JPH09257860A - Method and apparatus for constructing database for detecting abnormal current of wire harness for vehicle - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To easily construct a database of reference data used for detecting occurrence of rare shorts and leaks. SOLUTION: A current flowing through a battery 3 of a vehicle is measured by a battery current measuring means 23b, and a current change of the battery 3 is detected by a battery current change detecting means 25A based on the measured current. 3 and multiple loads 17A
To a plurality of wire harnesses 6 that respectively connect to 17N
A parameter for detecting abnormal current, which is used when detecting whether or not an abnormal current has occurred in A to 6N, indicating the content of the state change occurring in each wire harness 6A to 6N corresponding to the normal operation of each load 17A to 17N Is calculated by the reference value indexing means 25B and the indexed reference data is linked to a predetermined title and stored in the database holding means 25bA.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention holds reference data of an abnormal current detection parameter used when detecting an abnormal current in a plurality of wire harnesses for supplying electric power respectively connecting a battery of a vehicle and a plurality of loads. And a device for constructing a database for the same.

[0002]

2. Description of the Related Art In a vehicle such as a passenger car, a load consisting of a combination meter including a speedometer and various warning lamps, a power window, and an electric equipment such as a lighting system such as a headlight and a hazard lamp,
The power from the battery is supplied by each individual wire harness.

FIG. 16 is an explanatory view of a vehicle electrical system showing a connection state of a conventional wire harness of this type, and reference numeral 1 in the figure.
In the electrical system shown by 1, the battery 1 has a load 1 that can be used according to the switching state of the ignition switch 5.
A main harness 7 for supplying electric power to 7a ₁ and 17a _{2 to} 17d is connected, and the main harness 7 is inside a relay box (hereinafter, abbreviated as R / B) 9 and is in a switching state of the ignition switch 5. The auxiliary trunk harness 11 for supplying a dark current to the always usable load 17e is branched into two.

The core harness 7 is connected to the common contact of the ignition switch 5 on the downstream side of the R / B 9,
"ACC (accessory)" and "ON" of the ignition switch 5 (in this case, "ON1", "ON2")
2 parallel contacts) and each contact of “START” are respectively connected to a joint box and a fuse box (hereinafter collectively abbreviated as J / B) 15 via intermediate harnesses 13a to 13d, and , The auxiliary trunk harness 11 branched from the trunk harness 7 is also J / B15
It is connected to the.

The J / B 15 is an ignition switch.
When chi 5 is at each contact of "START" and "ON"
Usable load 17a₁ , 17a_Two Similarly, "ST
Negative that can be used when it is at each contact of "ART" and "ON"
For load 17b, "START", "ON", and "AC"
"S" for load 17c that can be used at each contact of "C"
For the load 17d that can be used when it is at the contact of "TART",
Also, regardless of the contact position of the ignition switch 5.
For load 17e that is supplied with dark current so that it can be used
Small current fuse 15a₁ , 15a_Two With ~ 15e
Cage, each small current fuse 15a₁ , 15a_Two ~ 15e
The downstream side of the plurality of branch harnesses 19a ₁ , 19a_Two ~
Each load 17a corresponding to 19e₁ , 17a_Two ~ 1
7e.

A slow blow fuse (= large current fuse, hereinafter abbreviated as S / B) 9 which heats and blows when a current exceeding a predetermined value flows in the R / B 9.
a and 9b are accommodated, and the S / B 9a is located at the ignition switch 5 rather than at the branch point with the auxiliary backbone harness 11.
The main harness on the side is provided at 7 places, and the S / B 9b is provided on the auxiliary main harness 11.

In such a conventional electrical system 1, when an overcurrent state occurs due to the occurrence of a dead short,
For the main harness 7 and the intermediate harnesses 13a to 13d, the S / B 9a that has generated heat due to overcurrent is blown, and for the auxiliary main harness 11, the S / B 9b is also blown, and the branch harnesses 19a ₁ and 19a _{2 to} 19 are also blown.
For e, small current fuses 15a ₁ and 15a ₂ to 1
5e is also melted to cut off the connection between the location where the dead short occurs and the battery 3, whereby the harnesses 7, ₁₁ , 13, 19a ₁ , 19a _{2 to} 19e are overheated,
I try to protect it from damage such as ignition.

By the way, in the above-described conventional electrical equipment system 1, each harness 7, 11, 13a to 13d, 19a ₁ ,
A crack or the like occurs in the coating of 19a _{2 to} 19e, and the inner core wire is repeatedly brought into and out of contact with the vehicle body due to vibration accompanying traveling of the vehicle.
A so-called rare short may occur, or each harness 7,
11,13A～13d, the leakage current is generated at 19a _1, 19a ₂ ~19e, although as is not large when a dead short occurs, if left the harness 7,11,13a~13d, 19a ₁ ，
19a _{2 to} 19e are overheated, and an overcurrent that may cause ignition causes a short circuit or leak in the harness 7,1.
₁ , 13a to 13d, 19a ₁ and 19a _{2 to} 19e may flow.

However, when such a rare short circuit or a leak occurs, the overcurrent is not as large as that when a dead short circuit occurs, as described above. The fuses 15a ₁ and 15a _{2 to} 15e may not be heated until they are blown, and it is necessary to leave the fuses 15a ₁ and 15a _{2 to} 15e alone as they are.
It is not preferable considering that 3d, 19a ₁ and 19a _{2 to} 19e may eventually overheat and ignite, and it is desirable to take further measures from the viewpoint of safety.

[0010]

By the way, each of the above
Harnesses 7, 11, 13a to 13d, 19a₁ , 19a
_Two Occurs when a rare short circuit or leak occurs in ~ 19e
Harnesses 7, 11, 13a to 13d, 19a₁ , 1
9a_Two The current value changes at points -19e. Follow
The harness 7, 11, 13a to 13d, 19a₁ , 1
9a_Two ~ 19e can cause erroneous fusing in normal condition
S / B 9a, 9b and small current fuse 15a
₁ , 15a_Two Review the fusing characteristics of ~ 15e to improve
Rather than taking measures, it is not
U, each harness 7, 11, 13a to 13d, 19a₁ ,
19a_Two It is better to monitor the change state of the current value of ~ 19e,
More direct and reliable detection of rare shorts and leaks
Out can be realized.

However, in order to do so, each load 17a ₁ ,
When 17a ₂ ~17e is operating normally, the harness 7,11,13a~13d, 19a _1, 19a ₂ ~
Of whether 19e is much current value is, it is necessary to refer to the reference value of the parameter also said criteria in detecting rare short or leakage, in particular, the load 17a _1,
Or if the number and content of 17a ₂ ~17e varies depending on the model, the user is unknown spec load 17a _1, 17a ₂
When ˜17e is retrofitted, it becomes practically very difficult to keep the reference values of the above-mentioned parameters as known.

The present invention has been made in view of the above circumstances, and an object of the present invention is to detect in advance whether or not a rare short circuit having a smaller overcurrent than a dead short circuit or a leak is generated. Make sure that the reference value of the parameter to be retained is independent of the load content, and
An object of the present invention is to provide a method and an apparatus for constructing a database for detecting an abnormal current of a vehicle wire harness that can be obtained with high accuracy.

[0013]

In order to achieve the above object, a method for constructing a database for detecting an abnormal current of a vehicle wire harness according to the present invention described in claim 1 connects a vehicle battery and a plurality of loads, respectively. Abnormal current detection used to detect whether or not an abnormal current has occurred in a plurality of wire harnesses for power supply In constructing the database holding the reference data of the parameter for use, the load is operated, the change in the current between the battery and the wire harness when the load is operated is detected, and the detected battery is used. Based on the change in the current between the wire harness, the reference data regarding the wire harness to which the operated load is connected. Ri out, the reference data indexing said, is characterized in that as searchable manage the predetermined title.

According to a second aspect of the present invention, there is provided a method for constructing a database for detecting abnormal current in a wire harness for a vehicle, wherein the operation of the load for determining the reference data is performed for a limited period. did.

Further, in the method for constructing an abnormal current detection database for a wire harness for a vehicle according to a third aspect of the present invention, the reference data is the wire harness to which the loads are connected in association with the operation of each load. Is the value of the normal current flowing during normal operation, based on the change in the current between the detected battery and the wire harness, the change in the current between the battery and the wire harness due to the operation of each load. The amount was determined as the reference data.

According to a fourth aspect of the present invention, there is provided a method for constructing a database for detecting abnormal current of a wire harness for a vehicle, wherein the reference data is the wire harness to which the loads associated with the operation of the respective loads are connected. Is a waveform pattern showing a change in current of the battery, based on a change in the current between the detected battery and the wire harness, the waveform pattern showing a change in the current of the battery accompanying the operation of each load is the reference. I tried to figure it out as data.

Further, in the method for constructing a database for detecting abnormal current of a vehicle wire harness according to a fifth aspect of the present invention, the reference data is a resistance value between the battery and the wire harness, and The voltage of the battery is measured, and based on the measured voltage of the battery and the change in the current A between the detected battery and the wire harness, the battery and the wire that change with the operation of each load. The resistance value between the harness and the harness is calculated as the reference data.

According to a sixth aspect of the present invention, there is provided a method for constructing an abnormal current detection database for a wire harness for a vehicle, wherein the reference data is a resistance value of each wire harness at the time of operating each load. , Measuring the voltage of the battery and measuring the current of the corresponding wire harness when the load is operated, and based on the measured current of the wire harness and the measured voltage of the battery, The resistance value of each wire harness when the load is operated is determined as the reference data.

According to the seventh aspect of the present invention, in the method of constructing the abnormal current detection database for a vehicle wire harness, the reference data is used as the predetermined title.

Further, in the method for constructing a database for detecting abnormal current of a wire harness for a vehicle according to the present invention, the load actuated for calculating the reference data is identified, and the identified load is identified. The reference data is managed by using an identification name as the predetermined title.

According to the ninth aspect of the present invention, there is provided a method for constructing a database for detecting abnormal current in a wire harness for a vehicle, wherein the operation of the load for determining the reference data is individually performed in a predetermined order. I tried to do everything.

Further, in the method for constructing the abnormal current detection database for a wire harness for a vehicle according to the tenth aspect of the present invention, the identification name of the load corresponding to the order is set to the predetermined title.

Further, as shown in the basic configuration diagram of FIG. 1, the apparatus for constructing an abnormal current detection database for a wire harness for a vehicle of the present invention according to claim 11 has a vehicle battery 3 and a plurality of loads 17A to 17A. Each of the wire harnesses 6A corresponding to the normal operation of each of the loads 17A to 17N, which is used when detecting whether or not an abnormal current has occurred in the plurality of wire harnesses 6A to 6N for power supply, which are respectively connected to 17N. A device for constructing a database holding the reference data of the abnormal current detection parameter indicating the contents of the state change occurring in 6N to 6N on the database holding means 25bA, the battery 3 and the wire harness 6A.
To 6N, a battery current measuring means 23b for measuring a current flowing between the battery 3 and the wire harness when the loads 17A to 17N are operated based on the measured current of the battery current measuring means 23b. Battery current change detecting means 25A for detecting a change in current flowing between 6A and 6N, and the battery current change detecting means 25A.
Detected by the battery 3 and the wire harness 6A
The wire harness 6 to which the operated loads 17A to 17N are connected based on a change in current flowing between the wire harness 6 and the 6N.
A reference value indexing means 25B for indexing the reference data for A to 6N, and storing the reference data indexed by the reference value indexing means 25B in the database holding means 25bA by linking it with a predetermined title. Is characterized by.

Further, the apparatus for constructing an abnormal current detection database for a vehicle wire harness according to the present invention further comprises a learning period setting means 26 for setting a learning period, and the reference value indexing means 25B. However, the reference data of the wire harnesses 6A to 6N corresponding to the loads 17A to 17N operated during the learning period is determined.

Further, in the apparatus for constructing an abnormal current detection database for a vehicle wire harness according to a thirteenth aspect of the present invention, the reference data is used for each of the loads 17A to 17N.
Is a value of a normal current flowing through the wire harnesses 6A to 6N connected to the loads 17A to 17N in a normal state, and the reference value indexing means 25B detects the battery current change detecting means 25A. Based on the change in the current flowing between the battery 3 and the wire harnesses 6A to 6N, the amount of change in the current flowing between the battery 3 and the wire harnesses 6A to 6N is determined as the reference data.

Further, in the apparatus for constructing an abnormal current detection database for a vehicle wire harness according to the present invention, the reference data may be used for each of the loads 17A-17.
It is the waveform pattern which shows the change of the electric current of the said wire harness 6A-6N to which the said load 17A-17N is connected with the operation | movement of N, The said reference value indexing means 25B detected by the said battery current change detection means 25A. Based on the change in the current flowing between the battery 3 and the wire harnesses 6A to 6N, the battery 3 and the wire harnesses 6A to 6N
The waveform pattern S of the change in the current flowing between N and N is determined as the reference data.

The construction apparatus for an abnormal current detection database for a vehicle wire harness according to a fifteenth aspect of the present invention further comprises a battery voltage measuring means 23d for measuring the voltage of the battery 3, and the reference data is , The loads 17A to 17 associated with the operation of the loads 17A to 17N
N is the resistance value between the connected wire harnesses 6A to 6N and the battery 3, and the reference value calculating means 2
5B is based on the voltage of the battery 3 measured by the battery voltage measuring means 23d and the change in the current flowing between the battery 3 and the wire harnesses 6A to 6N detected by the battery current change detecting means 25A. In addition, the resistance value between the battery 3 and the wire harnesses 6A to 6N is determined as the reference data.

In the vehicle wire harness abnormal current detection database constructing apparatus of the present invention as defined in claim 16, a battery voltage measuring means 23d for measuring the voltage of the battery 3 and the wire harnesses 6A to 6N are provided. And a plurality of harness current measuring means 23e for measuring the current of the load, the reference data being the load 17A to 17A.
The resistance value of each of the wire harnesses 6A to 6N at the time of operation of N. Based on the measured currents of the wire harnesses 6A to 6N, the resistance values of the wire harnesses 6A to 6N during the operation of the loads 17A to 17N are determined as the reference data.

Further, in the apparatus for constructing a database for detecting abnormal current of a wire harness for a vehicle according to a seventeenth aspect of the present invention, the predetermined title is the reference data.

The vehicle wire harness abnormal current detection database building device of the present invention according to claim 18 further comprises an operating load identifying means 25C for identifying the operated loads 17A to 17N. The wire harness 6A to which the operated loads 17A to 17N are connected
To 6N, the reference data for the reference data
Every time 5B indexes, the identification names of the loads 17A to 17N identified by the operating load identifying means 25C are linked to the reference data indexed by the reference value indexing means 25B and stored in the database holding means 25bA. I decided.

Further, in the apparatus for constructing an abnormal current detection database for a vehicle wire harness according to a nineteenth aspect of the present invention, the battery current change detecting means 25A is based on the measured current of the battery current measuring means 23b. , The load 17A individually according to a predetermined order.
The change in the current flowing through the battery 3 when the 17N is operated is individually detected in the order of the operated loads 17A to 17N.

Further, in the apparatus for constructing a database for detecting abnormal current of a wire harness for a vehicle according to a twentieth aspect of the present invention, the predetermined title is an identification name of the loads 17A to 17N corresponding to the order. I decided.

According to the method for constructing the database for detecting abnormal current of the vehicle wire harness of the present invention described in claim 1, the battery accompanying the operation of the load is normally operated when the wire harness has no abnormality such as a rare short circuit or leakage. The change in the current between the wire harness and the wire harness is uniquely determined by the specifications of the operated load, and matches the current that flows in the wire harness to which the operated load is connected, in the absence of abnormalities such as rare shorts and leaks. On the contrary, if there is an abnormality such as a rare short circuit or a leak in the wire harness to which the operated load is connected, it does not match the current flowing at that time. Therefore, the reference data regarding the wire harness to which the operated load is connected, which is calculated based on the change in the current between the battery and the wire harness detected when the load is operated, is a rare short circuit to the wire harness. It can be treated as a reference value for detecting whether or not there is an abnormality such as a leak.

As described above, the reference data that can be used as a reference for determining whether or not there is an abnormality such as a rare short circuit or a leak is determined only by detecting the change in the current between the battery and the wire harness due to the operation of the load. Since it is made into a database, it becomes possible to construct the database of the reference data by a simple operation of operating the load, without the need to check the specifications of the load and then to construct the database in advance. Moreover, since the reference data can be searched by a predetermined title, the current change on the wire harness was obtained by actual measurement without knowing whether the wire harness had an abnormality such as a rare short circuit or a leak, and the index was calculated based on this. When performing anomaly detection by collating data in an arbitrary form with reference data, it becomes possible to select reference data to be collated according to the form of the data obtained by actual measurement. Incidentally, this is
The same applies to the apparatus for constructing an abnormal current detection database for a vehicle wire harness according to the present invention.

Further, according to the method for constructing the abnormal current detection database for a wire harness for a vehicle of the present invention as defined in claim 2, by limiting the period in which the load is operated for making the reference data database, It is possible to define the construction completion time of the database and to clarify the start time when the reference data of the database can be referred to in order to detect the occurrence of an abnormality such as a rare short or leak of the wire harness. The same applies to the apparatus for constructing the abnormal current detection database for a vehicle wire harness according to the present invention.

Further, according to the method for constructing the abnormal current detection database for a vehicle wire harness of the present invention as set forth in claim 3, the reference data is stored in the wire harness to which the load is connected as each load operates. By setting the normal current that flows in the normal state, it is possible to reduce the data amount per reference data and reduce the database capacity. The same applies to the apparatus for constructing an abnormal current detection database for a vehicle wire harness according to the present invention.

Further, according to the method for constructing the abnormal current detection database for a vehicle wire harness of the present invention as set forth in claim 4, the reference data is stored in the wire harness to which the load is connected according to the operation of each load. By using the waveform pattern of the current change that occurs, even if an abnormality such as a rare short circuit or leakage does not occur when the load is a motor, the current change that occurs in the wire harness to which the load is connected changes over time. Even if there is a change, a normal value change on the wire harness due to the operation of that load can be reliably distinguished from that due to the occurrence of an abnormality such as a rare short circuit or leakage. It can be provided at the time of detection. The same applies to the apparatus for constructing an abnormal current detection database for a vehicle wire harness according to the present invention as set forth in claim 14.

Further, according to the method for constructing the abnormal current detection database for a vehicle wire harness of the present invention described in claim 5 and claim 6, the reference data is used as the battery and the wire harness at the time of operation of each load. The resistance value between the two and the resistance value of the wire harness to which the load is connected during operation of each load are not affected by changes in the battery voltage due to changes in the surrounding environment. It becomes possible to create a database of reference values based on parameters that can reliably detect the occurrence of anomalies such as rare shorts and leaks, and provide them when anomalies are detected. The same applies to the apparatus for constructing an abnormal current detection database for a vehicle wire harness according to the present invention as described in claims 15 and 16.

Further, according to the method of constructing the abnormal current detection database for a vehicle wire harness of the present invention as set forth in claim 7, by using the reference data itself as a predetermined title, a rare short circuit or a leak occurs in the wire harness. Even if it is not possible to identify which load is associated with the current change on the connected wire harness, the data obtained by actual measurement without knowing whether or not there is an abnormality matches the content of the data. Alternatively, it is possible to select and search the reference data that are close to each other and provide the reference data for matching. The same applies to the apparatus for constructing the abnormal current detection database for a vehicle wire harness according to the present invention.

Further, according to the method of constructing the database for detecting abnormal current of the wire harness for a vehicle of the present invention described in claim 8, by making it possible to search the reference data by the title by the identification name of the corresponding load, On the detection side of whether there is an abnormality such as a rare short circuit or a leak, when it is possible to identify which load the wire harness to which the current change generated on the wire harness is connected,
Using the load connected to the specified wire harness as the address pointer, select and search the reference data for matching,
It can be provided for verification. The same applies to the apparatus for constructing the database for abnormal current detection of the vehicle wire harness according to the eighteenth aspect of the present invention.

According to the method for constructing a database for detecting abnormal current in a vehicle wire harness of the present invention as defined in claim 9, a database is created by individually operating all the loads in a predetermined order. It will be possible to collect all the minimum standard data required. The same applies to the device for constructing the abnormal current detection database for a vehicle wire harness according to the present invention.

Further, according to the method for constructing the database for detecting abnormal current of the wire harness for a vehicle of the present invention described in claim 10, it is possible to directly identify which load is operated at the time of indexing the reference data. Even if it is not possible, the reference data can be searched by the title by the corresponding load identification name. Therefore, the database for abnormal current detection of the vehicle wire harness of the present invention according to claim 7 is constructed. Similar to the method, if it is possible to identify which load the wire harness to which the current change generated on the wire harness is connected is detected on the detection side of whether there is an abnormality such as a rare short circuit or a leak. Using the load connected to the wire harness as an address pointer, select and search the reference data for verification and provide it for verification. Theft is possible. Incidentally, this is
The same applies to the apparatus for constructing an abnormal current detection database for a vehicle wire harness according to a twentieth aspect of the present invention.

[0043]

BEST MODE FOR CARRYING OUT THE INVENTION A method for constructing a database for detecting abnormal current in a vehicle wire harness according to the present invention will be described below.
An explanation will be given with reference to the drawings together with an apparatus for constructing an abnormal current detection database for a vehicle wire harness.

FIG. 2 is an explanatory diagram of a vehicle electrical system equipped with an abnormal current detection database building system according to the first embodiment of the present invention. In FIG. 2, the same parts and locations as shown in FIG. With the same reference numerals as those given in FIG. 16,
A duplicate description will be omitted.

In the electrical system of the present embodiment shown by reference numeral 21 in FIG. 2, the S / B 9a provided in the main harness 7 inside the R / B 9 is changed to the main relay 23a. A conventionally known current sensor 23b (corresponding to a battery current measuring means) for measuring the current flowing through the battery 3 is provided inside / B9.
16 is different from the conventional electrical system 1 shown in FIG. 16 in that it is provided at seven locations on the main harness on the ignition switch 5 side of the main relay 23a.

Further, the electrical system 21 of the present embodiment includes a microcomputer (hereinafter abbreviated as "microcomputer") 25 for controlling the opening / closing operation of the main relay 23a according to the current flowing through the battery 3 measured by the current sensor 23b. R
/ B9 and the auxiliary trunk harness 11 that was branched and connected to the trunk harness 7 inside the R / B9
Is different from the conventional electrical equipment system 1 shown in FIG. 16 in that it is connected to the end of the main harness 7 connected to the common contact of the ignition switch 5.

The microcomputer 25 has a CPU (Central Processing) as shown in the block diagram of the electrical configuration in FIG.
Unit, central processing unit) 25a, RAM (Random Access Memory) 25b and ROM (Read-Only Memory) 25c connected to the CPU 25a,
The microcomputer 25 is operated by a power source supplied from the battery 3 via the backbone harness 7 and a DC / DC converter (not shown).

The CPU 25a has the RAM 25b.
And the ROM 25c are connected, and the driver 23c of the main relay 23a and the current sensor 23b are connected.
The headlight (not shown) beam switch 27, wiper switch 29, and reset switch 31 are connected.

In the RAM 25b, as shown in a memory area map in FIG. 4, rare shorts, leaks, and
A data area for storing various data serving as a discrimination criterion for detecting a dead short and a work area used for various processing operations are provided, and in the work area, a current change amount buffer, a current change waveform pattern buffer, Rare short detection prohibition flag, learning completion flag,
In addition, each area of the learning flag and the like are provided.
The ROM 25c stores a control program necessary for the CPU 25a to perform various processes.

Next, the processing performed by the CPU 25a in accordance with the control program stored in the ROM 25c will be described with reference to the flow charts of FIGS.

When the microcomputer 25 connected to the battery 3 and supplied with power is activated and the program is started, the CPU 25a performs initialization as shown in the flowchart of the main routine in FIG. 5 (step S
1). In the initial setting of step S1, the RAM 25b
The current change amount buffer area and the current change waveform pattern buffer area are cleared, and the flag F1 of the rare short detection prohibition flag area, the flag F3 of the learning completed flag area, and the flag F5 of the learning in progress flag area are Set to "0".

When the initial setting in step S1 is completed,
It is confirmed whether or not the flag F1 in the rare short detection prohibition flag area of the RAM 25b is "0" (step S
3) If the flag F1 is not "0" (step S3)
N), the process proceeds to step S35 described later, and if it is "0" (Y in step S3), it is confirmed whether the flag F3 in the learning completed flag area of the RAM 25b is "0" (step S5). ).

If the flag F3 in the learning completed flag area is not "0" (N in step S5), the process proceeds to step S27 described later, and if it is "0" (step S5).
5) and confirms whether the flag F5 in the learning flag area of the RAM 25b is "0" (step S7),
If the flag F5 is not "0" (N in step S7), the process proceeds to step S13, which will be described later, and if the flag F5 is "0" (Y in step S7), the normal operation by the beam switch 27 and the wiper switch 29 is performed. It is confirmed whether or not an operation for instructing the start of learning is performed by a special combination operation that is not performed during the operation of (step S9).
If the learning start operation has not been performed (N in step S9), the process returns to step S3, and if it has been performed (Y in step S9), after setting the flag F5 to "1" (step S11), It returns to step S3.

When the flag F5 in the learning flag area is not "0" in step S7, the process proceeds to (N). In step S13, the contents different from the learning start operation by the beam switch 27 and the wiper switch 29. It is confirmed whether or not an operation for instructing the end of learning by a special combination operation, which is not performed during normal operation, is performed, and if the operation for ending learning is performed (step S13).
Y), the process proceeds to step S21 described later, and if not performed (N in step S13), it is confirmed whether or not there is a change in the current measured by the current sensor 23b and fetched (step S15).

If there is no change in the fetched current (N in step S15), the process returns to step S3, and if there is a change (Y in step S15), learning processing is performed (step S17).

In the learning process of step S17, the process shown in FIG.
As shown in the flow chart of the sub-routine, the change amount ΔA of the current confirmed to have changed in step S15
From the current measured and captured by the current sensor 23b (step S17a), and whether or not the acquired current change amount ΔA exists in the data of the current change amount stored in the data area of the RAM 25b. Is confirmed (step S17b). If the current change amount ΔA acquired in step S17a exists in the data of the current change amount in the data area (Y in step S17b), the process proceeds to step S17d described later, and if it does not exist (N in step S17b), After storing the current change amount ΔA acquired in step S17a in the current change amount buffer area of the RAM 25b (step S17c), the process proceeds to step S17d.

In step S17d, the waveform pattern S of the current change confirmed to have changed in step S15.
From the current measured and captured by the current sensor 23b, and then the acquired waveform pattern S is RA
It is confirmed whether or not it exists in the data of the current change waveform pattern stored in the data area of M25b (step S17e).

When the current change waveform pattern S acquired in step S17d exists in the data of the current change waveform pattern in the data area (Y in step S17e),
Returning to the main routine, the process proceeds to step S19, and if there is not any (N in step S17e), step S17
After storing the current change waveform pattern S acquired in step d in the current change waveform pattern buffer area of the RAM 25b (step S17f), the process returns to the main routine and returns to step S
Proceed to 19.

In step S19, which proceeds after the learning process of step S17 is completed, as shown in FIG. 5, the main harness 7, the auxiliary main harness 11, and the intermediate harnesses 13a-1
3d, and, branch harness 19a _1, 19a ₂ ~19e
A dead short detection process is performed to detect whether or not a dead short has occurred.

In the dead short detection processing of step S19, as shown in the flowchart of the subroutine in FIG. 7, the value A of the current measured and taken in by the current sensor 23b is acquired (step S19a), and then acquired. current value a, as a determination reference of the dead short occurs, the load 17a _1, 17a ₂ branch harness 19a ₁ corresponding to the time of operation of ~17e, 19a ₂ ~19e higher reference current than the sum of the normal current flowing It is confirmed whether or not the value has reached A _TH (step S19b).

When the current value A measured and fetched by the current sensor 23b does not reach the reference current value A _TH (N in step S19b), the process returns to the main routine and returns to step S3 to return the current value A _TH. Has reached the reference current value A _TH (Y in step S19b), the output of the main relay closing signal for closing the main relay 23a to the driver 23c is stopped (step S19c), and then the rare After setting the flag F1 in the short detection prohibition flag area to "1" (step S19)
d) The process returns to the main routine and returns to step S3.

Further, in step S21, which proceeds to the case where the learning end operation is performed in step S13 (Y), as shown in FIG. 5, the current change amount ΔA stored in the current change amount buffer area and the current change waveform pattern are stored. The current change waveform pattern S stored in the buffer area is stored in the RAM 25.
The learning data transfer process is performed to transfer the data to the data area b and clear the current change amount buffer area and the current change waveform pattern buffer area, respectively, and then set the flag F3 of the learning completed flag area to "1". At the same time (step S23), the flag F5 in the learning flag area is set to "0" (step S25), and the process returns to step S3.

Further, if the flag F3 in the learning completed flag area is not "0" in step S5, the process proceeds to step S27. In step S27, it is confirmed whether or not the current measured by the current sensor 23b has been changed. If there is no change in the fetched current (step S
27), the process returns to step S3, and if there is a change (Y in step S27), dead short detection processing is performed (step S29).

In the dead short detection process of step S29, as in step S19, as shown in FIG. 7, the value A of the current measured and fetched by the current sensor 23b is acquired (step S29a), and then, obtained current value a, as a determination reference of the dead short occurs, higher than the load 17a _1, 17a ₂ branch harness 19a ₁ corresponding to the time of operation of ~17e, 19a ₂ sum of the normal current through the ~19e It is confirmed whether or not the reference current value A _TH is reached (step S29b).

When the current value A measured and fetched by the current sensor 23b does not reach the reference current value A _TH (N in step S29b), the process returns to the main routine and proceeds to step S31, where the current value A is Reference current value A _TH
If it has reached (Y in step S29b), the output of the main relay closing signal to the driver 23c for closing the main relay 23a is stopped (step S2).
9c), then, after setting the flag F1 of the rare short detection prohibition flag area to "1" (step S29d),
It returns to the main routine and proceeds to step S31.

In step S31, which is executed after the dead short detection process in step S29, it is confirmed whether the flag F1 in the rare short detection prohibition flag area is "0", as shown in FIG. If the flag F1 is not "0" (N in step S3), step S
When it is “0” (Y in step S3), the main harness 7, the auxiliary main harness 11, the intermediate harnesses 13a to 13d, and the branch harness 19a ₁ ,
Rare short / leak detection processing is performed to detect whether or not a rare short or leak has occurred in 19a _{2 to} 19e (step S33).

In the rare short circuit / leakage detection process of step S33, as shown in the flow chart of the subroutine in FIG. 8, the current change amount ΔA confirmed to have changed in step S27 is measured by the current sensor 23b and fetched. Obtained from the generated current (step S33a),
It is confirmed whether or not the acquired current change amount ΔA exists in the current change amount data stored in the data area (step S33b).

Current change amount Δ obtained in step S33a
If A does not exist in the current change amount data in the data area (N in step S33b), the process proceeds to step S33e, which will be described later, and if A (Y in step S33b), confirms that there is a change in step S27. The waveform pattern S of the changed current is acquired from the current measured and captured by the current sensor 23b (step S33).
c) Next, it is confirmed whether or not the acquired waveform pattern S exists in the data of the current change waveform pattern stored in the data area (step S33d).

When the current change waveform pattern S acquired in step S33d exists in the data of the current change waveform pattern in the data area (Y in step S33d),
Return to the main routine, return to step S3, and if not present (N in step S33d), step S3
Go to 33e. In step S33e, the driver 23c
Output of the main relay closing signal for closing the main relay 23a is stopped, then the flag F1 in the rare short detection prohibition flag area is set to "1" (step S33f), and then the process returns to the main routine. And returns to step S3.

If the flag F1 of the rare short detection prohibition flag area is not "0" in step S5 (N), then in step S35, as shown in FIG.
It is confirmed whether or not the reset switch 31 has been operated, and if it has not been operated (N in step S35), the process returns to step S3, and if it has been operated (step S3).
5), the main relay closing signal is output to the driver 23c in order to close the main relay 23a (step S37), and then the flag F1 in the rare short detection prohibition flag area is set to "0". After doing (step S3
9) Return to the main routine and return to step S3.

As is clear from the above description, the present embodiment
In the form, the main harness 7 and the auxiliary main harness 1
1, intermediate harness 13a-13d, and branch harness
19a ₁ , 19a_Two ~ 19e, the wire in the claims
The harnesses 6A to 6N are configured to include the load 17a.₁ , 1
7a_Two ~ 17d corresponds to the loads 17A to 17N in the claims.
The beam switch 27 and wiper switch 29.
Therefore, the learning period setting means 26 in the claims is configured,
Flow sensor 23b, microcomputer 25, beam switch 27,
Also, the wiper switch 29 is used to detect the abnormal current detection data.
A database construction device is configured.

Further, in this embodiment, the database holding means 25bA in the claims is constituted by the data area of the RAM 25b, and the battery current change detecting means 25A.
5 includes steps S15 and S27 in the flowchart of FIG. 5, and steps S17a and S17d in the flowchart of FIG.

[0073] Further, in the present embodiment, the reference value indexing means 25B in claims is constituted by a step S17a and step S17d in FIG. 6, is stored in the data area of the RAM 25b, the loads 17a _1, 17a ₂ corresponding branch harnesses 19a with the operation of ~17e _1, 19a ₂ ~1
The data of the change amount ΔA of the change generated in the current flowing through 9e and the change waveform pattern S correspond to the reference data in the claims.

Next, the operation (action) of the apparatus for constructing the abnormal current detection database according to this embodiment having the above-mentioned configuration will be described.

For example, the final run before the delivery of the vehicle is completed.
Before taking the line test, RA of the microcomputer 25
M25b includes the main harness 7, the auxiliary main harness
11, intermediate harness 13a to 13d, and branch harness
Space 19a₁ , 19a_Two ~ 19e, rare shorts and Lee
Is a criterion for detecting whether or not a black mark has occurred,
Each load 17a₁ , 17a_Two Corresponding with the operation of ~ 17e
Branch harness 19a ₁ , 19a_Two ~ 19e electric current
Change amount ΔA of the change that occurs in the flow and the change waveform pattern S
Data is not stored at all.

Therefore, first, a learning start instruction operation is performed by a special combination of the beam switch 27 and the wiper switch 29 to notify the microcomputer 25 of the start of the learning period. Before the start of the learning period is notified to the microcomputer 25, it is confirmed whether or not the current value A measured by the current sensor 23b and taken into the microcomputer 25 has reached the reference current value A _TH. By doing so, only the operation of detecting the occurrence of a dead short is performed.

After the start of the learning period is notified to the microcomputer 25, in addition to the operation of detecting the occurrence of the dead short, the amount of change in the current serving as a discrimination reference for detecting the occurrence of a rare short or a leak is detected. A learning operation for collecting ΔA and the current change waveform pattern S is performed. In this learning operation, the loads 17a _1, 17a ₂ ~17e, alone, or, operating two or more simultaneously, with this, the current value A changes taken into the microcomputer 25 is measured by a current sensor 23b Each time, the current change amount ΔA and the current change waveform pattern S acquired by the microcomputer 25 from the changed current value A are collected and stored in the RAM 25b so that there is no duplication.

During this learning period, each load 17a
₁ , 17a _{2 to} 17e while operating one by one,
If the current change amount ΔA and the current change waveform pattern S acquired by the microcomputer 25 based on the current value A measured by the current sensor 23b and taken into the microcomputer 25 are collected and stored in the RAM 25b, the loads 17a ₁ and 17a can be stored. ₂ ~ 17e
Due to the single operation, trunk harness 7, auxiliary trunk harness 11, intermediate harnesses 13 a to 13 d, and the branch harnesses 19a _1, 19a ₂ normal current change amount of ～19E delta
It is possible to collect A and the current change waveform pattern S without omission. Also, if so, the plurality of loads 17a ₁ , 1
When 7a ₂ ~17e is activated at the same time, trunk harness 7, auxiliary trunk harness 11, intermediate harnesses 13a~13
This is also advantageous in determining the normal combined current change amount ΔA and the combined current change waveform pattern S of d and the branch harnesses 19a ₁ and 19a _{2 to} 19e.

In this case, the collected current change amount Δ
A or current change waveform pattern S is applied to each load 17a₁ , 17
a_Two Load 17 operated according to the order of operation
7a ₁ , 17a_Two ~ 17e name and alternatives
A title, number, etc. is given and this title and
And store it in RAM25b, and then specify the title.
And load 17a corresponding to the title₁ , 17a_Two 
~ 17e current change amount ΔA and current change waveform pattern
You may be able to search the S. That way
For example, in the case of
Although it is not performed in the detection operation of occurrence, rare short or lead
Load 17a while detecting the occurrence of₁ , 17a_Two ~ 17e
Switches etc. that are operated when activating or deactivating the
By monitoring the state of (No.) with the microcomputer 25, the load 17
a₁ , 17a_Two Which load 17a during operation of ~ 17e₁ ,
17a_Two Advantageous when it is possible to identify whether ~ 17e is activated
It is.

That is, the operating load 1 specified by the microcomputer 25
The current change amount ΔA and the current change waveform pattern S corresponding to 7a ₁ , 17a _{2 to} 17e are searched in the data area of the RAM 25b, and the current value A measured by the current sensor 23b and fetched by the microcomputer 25 is obtained. On the basis of this, the microcomputer 25 is configured to collate with the current variation amount ΔA and the current variation waveform pattern S acquired by the microcomputer 25 so that unnecessary collation with unnecessary data among the data stored in the data area of the RAM 25b can be avoided. You can

If a predetermined period has passed since the microcomputer 25 was notified of the start of the learning period, the beam switch 27 and the wiper switch 29 are learned by a special combination different from the instruction operation of the learning end. The end instruction operation is performed to notify the microcomputer 25 of the end of the learning period. After the end of this learning period is notified to the microcomputer 25, instead of the learning operation not being performed, in addition to the operation of detecting the occurrence of the dead short, the current sensor 23b measures the current and the microcomputer 25 captures it. By confirming whether the amount of change in the current value A or the changed waveform pattern corresponds to the amount of current change ΔA or the current change waveform pattern S collected and stored in the RAM 25b by the learning operation described above, a rare short circuit or A leak occurrence detection operation is also performed.

In the detecting operation of the occurrence of the dead short circuit, when the current value A measured by the current sensor 23b and taken into the microcomputer 25 reaches or exceeds the reference current value A _TH , and In the operation of detecting the occurrence of a short circuit or a leak, the amount of change and the change waveform pattern of the current value A measured by the current sensor 23b and taken into the microcomputer 25 correspond to the amount of current change ΔA and the current change waveform pattern S of the RAM 25b at all. Otherwise, the main relay 23a is opened and the battery 3 and each load 17
a _1, 17a ₂ ~17e electrical connection is interrupted.

Further, when the main relay 23a is opened and the reset switch 31 is subsequently operated, the main relay 23a is closed. At that time, the current value A reaches or exceeds the reference current value A _TH. If the dead short state is present, or the change amount or change waveform pattern of the current value A does not correspond to the current change amount ΔA or the current change waveform pattern S of the RAM 25b at all, it is a rare short circuit or a leak state. The relay 23a is opened again.
Therefore, a dead short, and, in the event of a rare short or leakage, dead short state and short circuit state eliminate the cause, or, if not eliminate the leakage state, the battery 3 the loads 17a _1, 17a ₂ ~17e of The electrical connection remains interrupted.

As described above, according to the apparatus for constructing the abnormal current detection database of this embodiment, the beam switch 27 is used.
Also, during the learning period notified to the microcomputer 25 by a learning start or learning end instruction operation by a special combination of the wiper switch 29, the battery 3 and each load 17a.
₁ , 17a _{2 to} 17e On the main harness 7 that connects to the common contact of the ignition switch 5 that serves as a branch point, the current flowing through the battery 3 is measured by the current sensor 23b, and each load 17a ₁ , 17a _{2 to} 17e is measured. When the current value A measured by the current sensor 23b changes due to the operation of the current sensor 23b, the amount of change in the current flowing through the battery 3 and the change waveform pattern are acquired based on this change, and this is used for each load 1
7a ₁ , 17a _{2 to} 17e are acquired as the current change amount ΔA and the current change waveform pattern S associated with the normal operation of the
The data is collected and stored in 25b.

Therefore, the loads 17a ₁ , 17a ₂ to 1
The current change amount ΔA and the current change waveform pattern S associated with the normal operation of 7e are known, and the data of the current change amount ΔA and the current change waveform pattern S are time-consuming, rather than being stored in the RAM 25b in advance. R easily
It can be stored in the AM 25b to build a database.

Further, according to the present embodiment, since the current change amount ΔA is used as the parameter of the discrimination standard for detecting the occurrence of the rare short circuit or the leak, the discrimination standard can be simplified and prevented from becoming complicated. The reference value can be provided, and the amount of data stored in the RAM 25b can be reduced. Further, according to the present embodiment, since the current change waveform pattern S is used as the discrimination reference parameter for detecting the occurrence of the rare short circuit or the leak, the loads 17a ₁ and 17a _{2 to} 17e are loaded with the current change waveform pattern S. Each harness 7, 11, 13 a to 1 is a normal current change due to operation.
3d, 19a ₁ , 19a _{2 to} 19e, even when the degree of change of the current flowing through the 3d, 19a ₁ to 19a _{2 to} 19e changes with the passage of time, a normal current change associated with the operation of the load 17a ₁ , 17a _{2 to} 17e is not It is possible to provide a reference value that can be reliably distinguished from the occurrence of an abnormality such as a leak.

In the present embodiment, the RAM 25b is used as a discrimination reference for detecting the occurrence of rare shorts and leaks.
Although the data to be stored in 2 is the two parameters of the current change amount ΔA and the current change waveform pattern S, either one of the parameters may be omitted or the change of the current value A measured by the current sensor 23b may be used. It is also possible to store another parameter different from the above that can be calculated in the above.

Therefore, next, there are two parameters, the current change amount ΔA and the current change waveform pattern S, as the parameters of the data stored in the RAM 25b as the discrimination reference for detecting the occurrence of the rare short circuit and the leak. Is different from
An apparatus for constructing an abnormal current detection database according to the second embodiment of the present invention will be described.

FIG. 9 is an explanatory diagram of a vehicle electrical system including an abnormal current detection database building system according to a second embodiment of the present invention. In FIG. 9, the same parts and locations as shown in FIG. The same reference numerals as those given in FIG. 2 are given, and duplicate explanations are omitted.

The electrical system of the present embodiment shown by reference numeral 41 in FIG. 9 has a conventionally known voltage sensor for measuring the voltage of the battery 3 inside the R / B 9, together with the main relay 23a and the current sensor 23b. FIG. 2 shows that 23d (corresponding to a battery voltage measuring means) is provided, and this voltage sensor 23d is provided at seven main harnesses on the ignition switch 5 side of the main relay 23a, like the current sensor 23b. The configuration is different from the electrical system 21 of the first embodiment. In addition, the electrical system 41 of the present embodiment,
Each branch harnesses 19a _1, 19a ₂ a conventionally known current sensor 23e for measuring the ~19e current (corresponding to the harness current measuring means), the loads 17a _1, 17a ₂ each branch harness J / B15 nearer ~17e 19a ₁ and 19a
_The configuration is different from the electrical system 21 of the first embodiment shown in FIG. 2 in that it is provided at each of _{2 to} 19e.

Further, in the electrical system 41 of this embodiment, the CPU 25a of the microcomputer 25 is provided with the RAM 25b and the ROM 25 as shown in the block diagram of the electrical configuration in FIG.
c, the driver 23c of the main relay 23a, the current sensor 23b, the beam switch 27, the wiper switch 29, and the reset switch 31, and the voltage sensor 23d.
And the point where each current sensor 23e is connected, and each load 17a
Signal lines 33a ₁ and 3 for capturing the operating and stopping states of ₁ , 17a _{2 to} 17e (for example, the open / closed state of the switch)
3a _{2 to} 33e are connected to the CPU 25a and the loads 17a ₁ and 1
7a _{2 to} 17e is different in configuration from the electrical system 21 of the first embodiment.

In the electrical system 41 of this embodiment,
Instead of the flow change amount ΔA and the current change waveform pattern S
Each load 17a₁ , 17a_Two With the operation of ~ 17e,
Its load 17a₁ , 17a_Two ~ 17e branch connected
Harness 19a₁ , 19a_Two Normal resistance value of ~ 19e R
a₁ , Ra_Two ~ Re and normal resistance value R of electrical system 41
To determine the occurrence of rare shorts and leaks
Parameter of data stored in RAM25b as a reference
And In the electrical system 41 of this embodiment, the
Branch harness 19a₁ , 19a_Two Normal resistance of ~ 19e
Value Ra₁ , Ra_Two ~ Re and normal resistance value of electrical system 41
R data is the negative that was activated when this data was acquired
Load 17a₁ , 17a_Two ~ 17e name, or
In RAM25b by linking with titles such as symbols and numbers
To store and detect the occurrence of rare shorts and leaks
Resistance value Ra₁ , Ra _Two ~ Use data of Re and resistance R
This title is used as an address pointer when using
It is configured so that you can search for specific data.

Furthermore, in the electrical system 41 of this embodiment, as shown in the memory area map in FIG. 11, in the work area, instead of the current change amount buffer and the current change waveform pattern buffer provided in the first embodiment, the entire Each area of the resistance value buffer and the resistance value buffer for each harness is provided, and the rare short detection detection flag, the learning completed flag,
In addition, each area of the learning flag is left as it is.

In the electrical system 41 of this embodiment having such a configuration, the microcomputer 25 carries out the processing of each step shown in the flowchart of FIG.
This is very similar to the process of the flowchart of FIG. 5 performed by the microcomputer 25 in the electrical system 21 of the embodiment.

Specifically, the current change amount ΔA stored in the current change amount buffer area and the current change waveform pattern S stored in the current change waveform pattern buffer area, which were performed in step S21 in FIG. RAM25
As shown in FIG. 12, the transfer of b to the data area is performed by step S22, and the resistance value R stored in the overall resistance buffer area and the resistance values Ra ₁ , Ra ₂ stored in the harness-specific resistance buffer area RAM25b with Re
Instead of posting to the data area.

Regarding the other steps, the specific contents of the learning process of step S17A, the dead short detection process of steps S19A and S29A, and the rare short circuit and leak detection process of step S33A are shown in FIG. Learning processing in step S17, step S
19 and the dead short detection processing of step S29, and the rare short circuit and leak detection processing of step S33, which are performed by the microcomputer 25 of the electrical component system 21 of the first embodiment, the concrete contents shown in FIGS. 6 to 8 respectively. The same processing as each step shown in the flowchart of FIG. 5 is performed except for the difference. Therefore, in FIG.
Steps that perform the same processing as in FIG. 5 are assigned the same step numbers as those given in FIG. 5, and description thereof will be omitted.

Next, the electrical component system 41 of the present embodiment, which is different from the contents performed by the microcomputer 25 of the electrical component system 21 of the first embodiment, is described.
Specific contents of the learning process of step S17A, the dead short detection process of steps S19A and S29A, and the rare short circuit and leak detection process of step S33A performed by the microcomputer 25 will be described with reference to FIGS. 13 to 15. .

First, the microcomputer 25 of the electrical system 41 of the present embodiment performs the learning process shown in FIG.
As shown in the flowchart of subroutine, on the basis of the state change of the input signal from the signal line 33a _1, 33a ₂ ~33e, identifies the actuated loads 17a _1, 17a ₂ ~17e (step S17Aa), the specific Load 17
Data whose titles are a ₁ and 17a _{2 to} 17e are R
It is confirmed whether or not they are stored in both the overall resistance value buffer area of the AM 25b and the harness-specific resistance value buffer area (step S17Ab).

Specified loads 17a ₁ , 17a _{2 to} 17e
If the data having the title of is stored in both areas of the total resistance buffer and the harness-specific resistance buffer (Y in step S17Ab) returns to the main routine and proceeds to step S19A. (N in step S17Ab), the process proceeds to step S17Ac. In step S17Ac, the current confirmed to have changed in step S15, that is, the changed current sensor 2
Get the value A of the measured with the trunk harness 7 captured currents by 3b, then the load 17a ₁ specified in step S17Aa, 17a ₂ ~17e connected branch harnesses 19a _1, 19a ₂ ~19e of Current sensor 23e
Specified load 17a measured and taken in by
_1, 17a ₂ branch harness 19a which ~17e is connected
₁ , 19a _{2 to} 19e current values Aa ₁ and Aa _{2 to} Ae
Is acquired (step S17Ad).

Then, the voltage of the battery 3 measured and taken in by the voltage sensor 23d is set in step S17A.
The resistance value R of the electrical system 41 is determined by dividing the current value A of the main harness 7 acquired in step c (step S17A).
e), the voltage the voltage of the battery 3 incorporated is measured by the sensor 23d, the branch harness 19a ₁ obtained in step S17Ad, 19a ₂ ~19e current value Aa
Dividing by ₁ , Aa _{2 to} Ae, the branch harness 19a ₁ , 1
The resistance values Ra ₁ and Ra _{2 to} Re of 9a _{2 to} 19e are calculated (step S17Af), and these resistance values R and Ra ₁ ,
Ra _{2 to} Re are the loads 1 specified in step S17Aa
After being stored in the current change amount buffer area of the RAM 25b by being linked with the names of 7a ₁ and 17a _{2 to} 17e or titles composed of symbols and numbers (step S17A).
g) Then, the process returns to the main routine and proceeds to step S19A.

Next, the microcomputer 25 of the electrical system 41 of this embodiment is measured and fetched by the current sensor 23b in the dead short detection process of steps S19A and S29A as shown in the flowchart of the subroutine in FIG. The current value A obtained (step S
19Aa, step S29Aa), then the voltage sensor 2
The voltage of the battery 3 measured and taken in by 3d is divided by the current value A acquired in steps S19Aa and S29Aa to determine the resistance value R of the electrical system 41 (steps S19Ab and S29Ab). R is a reference resistance value R _TH or less, which is a criterion for determining the occurrence of a dead short, which is lower than the normal resistance value of the branch harnesses 19a ₁ , 19a _{2 to} 19e when the loads 17a ₁ and 17a _{2 to} 17e are operating. It is confirmed whether or not (step S19Ac, step S29Ac).

If the resistance value R calculated based on the current value A and the voltage of the battery 3 measured by the current sensor 23b and the voltage sensor 23d is not equal to or less than the reference resistance value R _TH (in steps S19Ac and S29Ac, N), return to the main routine, and in the case of step S19Ac, return to step S3, while step S2
In the case of 9Ac, the process proceeds to step S31, and when the resistance value R is equal to or less than the reference resistance value R _TH (Y in step S19Ac and step S29Ac), a main relay closing signal for closing the main relay 23a to the driver 23c. Is stopped (step S19Ad, step S2
9Ad), then, after setting the flag F1 of the rare short detection prohibition flag area to "1" (step S19A).
e, step S29Ae), returning to the main routine,
In the case of step S19Ac, the process returns to step S3, while in the case of step S29Ac, step S31.
Proceed to.

Further, the microcomputer 25 of the electrical component system 41 of the present embodiment confirms that there is a change in step S27 in the rare short circuit / leakage detection process of step S33A, as shown in the flowchart of the subroutine in FIG. That is, the value A of the current of the backbone harness 7 measured and taken in by the changed current sensor 23b is acquired (step S33Aa).

Next, the signal line 33a₁ , 33a_Two ~ 33e
Based on the state change of the input signal from the
a₁ , 17a_Two To 17e are specified (step S33A
b), the specified load 17a₁ , 17a_Two ~ 17e
Branch harness 19a connected ₁ , 19a_Two ~ 19e
Specific measured and captured by the current sensor 23e
Load 17a₁ , 17a_Two ~ 17e branch connected
Harness 19a₁ , 19a_Two -19e current value Aa
₁ , Aa_Two -Ae are acquired (step S33Ac).

Subsequently, the voltage of the battery 3 measured and taken in by the voltage sensor 23d is set in step S33A.
The resistance value R of the electrical system 41 is divided by the current value A of the main harness 7 acquired in step a) (step S33A).
d), the voltage the voltage of the battery 3 incorporated is measured by the sensor 23d, the branch harness 19a ₁ obtained in step S33Ac, 19a ₂ ~19e current value Aa
Dividing by ₁ , Aa _{2 to} Ae, the branch harness 19a ₁ , 1
The resistance values Ra ₁ and Ra _{2 to} Re of 9a _{2 to} 19e are calculated (step S33Ae).

Then, the data of the resistance value R of the electrical system 41 having the loads 17a ₁ , 17a _{2 to} 17e specified in step S33Ab as titles is searched from the data stored in the data area of the RAM 25b, and the search is performed. It is confirmed whether or not the resistance value R of the obtained data matches the resistance value R of the electrical system 41 determined in step S33Ad (step S33Af).

Electrical equipment system 4 determined in step S33Ad
The resistance value R of 1 is retrieved from the data area of RAM 25b.
If the resistance value R does not match (step S33Af
N), the process proceeds to step S33Ah, which will be described later, and matches.
If (Y in step S33Af), step S33A
Load 17a specified in b₁ , 17a_Two ~ 17e tight
Branch harness 19a₁ , 19a_Two ~ 19e resistance
Resistance value Ra₁ , Ra_Two The data of ~ Re are stored in the RAM 25b.
Search from the data stored in the data area and
The resistance value Ra of the data retrieved by₁ , Ra_Two ~ Re and
Branch harness 19a indexed by step S33Ae₁ ,
19a_Two Resistance value Ra of up to 19e₁ , Ra _Two ~ Re and match
It is confirmed whether or not it matches (step S33Ag).

The resistance values Ra ₁ , Ra of the branch harnesses 19a ₁ , 19a _{2 to} 19e determined in step S33Ae.
_{When 2 to} Re match the resistance values Ra ₁ and Ra _{2 to} Re retrieved from the data area of the RAM 25b (Y in step S33Ag), the process returns to the main routine and returns to step S3. S33
N for Ag), main relay 23 for driver 23c
After the output of the main relay closing signal for closing a is stopped (step S33Ah), the flag F1 in the rare short detection prohibition flag area is set to "1" (step S33Aj), and then the main routine is executed. It returns and returns to step S3.

As is clear from the above description, in this embodiment, the voltage sensor 23d and the current sensor 23e are added to the current sensor 23b, the microcomputer 25, the beam switch 27, and the wiper switch 29 to detect an abnormal current. A database construction device is configured. Further, in the present embodiment, the database holding means 25bA in the claims.
Is constituted by the data area of the RAM 25b, and the battery current change detecting means 25A is constituted by steps S15 and S27 in the flowchart of FIG.

Further, in this embodiment, the reference value indexing means 25B in the claims is composed of step S17Ae and step S17Af in FIG.
C is configured in step S17Aa in FIG.
Each load 17a ₁ , stored in the data area of 25b,
17a ₂ ~17e and the resistance value R of the electrical system 41 during operation of the actuation and load 17a _1, 17a ₂ ~17e branch is connected harness 19a _1, 19a ₂ the resistance value of ~19e Ra _1, Ra ₂ ~Re Data corresponds to the reference data in the claims.

In the electrical equipment system 41 of the second embodiment having such a configuration, the beam switch 27 and the wiper switch 2 are used.
Before the instruction to start learning by a special combination of 9 is given to notify the start of the learning period to the microcomputer 25, the current is measured by the current sensor 23b and measured by the microcomputer 25.
The occurrence of a dead short circuit is confirmed by checking whether or not the resistance value R obtained by dividing the voltage of the battery 3 measured by the voltage sensor 23d by the current value A taken in is less than or equal to the reference resistance value R _TH . Only the detection operation is performed.

Then, the learning period starts in the microcomputer 25.
After being notified, detection of the occurrence of the dead short circuit is performed.
In addition to the work, detect the occurrence of rare shorts and leaks.
Resistance value R of the electrical system 41 and the branch
Ness 19a₁ , 19a_Two Resistance value Ra of up to 19e₁ , R
a_Two A learning operation for collecting ~ Re is performed. this
In the learning operation, each load 17a₁ , 17a_Two ~ 17e made
The current value of the electrical system 41 that has moved and changed accordingly
A or the activated load 17a₁ , 17a_Two ~ 17e is connected
Branched harness 19a₁ , 19a_Two ~ 19e current
Value Aa₁ , Aa_Two ~ Ae is the current sensor 23b, 23e
Each time it is measured by
These current value A and current value Aa₁ , Aa_Two ~ By Ae
The voltage of the battery 3 measured by the voltage sensor 23d
Resistance value R of the electrical system 41 and the operated load 17a
₁ , 17a_Two ~ 17e connected to the branch harness 19a
₁ , 19a_Two Resistance value Ra of up to 19e₁ , Ra_Two ~ Re
But the activated load 17a ₁ , 17a_Two ~ 17e name,
Or, by linking with a title consisting of symbols and numbers, dub
It is collected and stored in the RAM 25b so that there is no margin.

Then, the microcomputer 25 starts the learning period.
After the notification, the beam
Instruction to end learning of switch 27 and wiper switch 29
Instruction to end learning by special combination different from operation
Operated and notified the end of the learning period to the microcomputer 25
After that, the learning operation is not performed. Instead
In addition to the detection operation of the occurrence of the dead short circuit,
Load 17a₁, 17a_Two Acquired with the operation of ~ 17e
Measured by the current sensor 23b
The current value A taken in and measured by each current sensor 23e
The current value Aa measured and taken into the microcomputer 25₁ , A
a_Two ~ Ae measured by voltage sensor 23d
The resistance value R of the electrical system 41 obtained by dividing the voltage of the battery 3
Or the activated load 17a₁ , 17a_Two ~ 17e is connected
Branch harness 19a ₁ , 19a_Two ~ 19e resistance
Ra₁ , Ra_Two ~ Re is RA by the learning operation described above.
Activated load 17a, which was collected and stored in M25b
₁ , 17a_Two Stored by linking to ~ 17e title
Resistance value R and resistance value Ra₁ , Ra_Two ~ Matches Re
Rare shorts and leaks caused by checking
Raw detection operations are also performed.

Detection of occurrence of the dead short circuit
In operation, the resistance value R is the reference resistance value R_THBelow
And the occurrence of rare shorts and leaks
In operation, the current sensors 23b and 23e and the voltage sensor
Electrical equipment that is calculated by the microcomputer 25 from the measurement result of 23d
The resistance value R of the system 41 and the operated load 17a₁ , 17a _Two 
~ 17e connected to the branch harness 19a₁ , 19a_Two 
Resistance value Ra of up to 19e ₁ , Ra_Two ~ Re is negative
Load 17a₁ , 17a_Two Link to the title of ~ 17e
The resistance value R and the resistance value Ra stored in the RAM 25b₁ , R
a_Two ~ If it does not match Re, the main relay 23a
Is opened and the battery 3 and each load 17a ₁ , 17a_Two ~
The electrical connection of 17e is cut off.

When the opened main relay 23a is closed by operating the reset switch 31, unless the cause of occurrence is eliminated and the dead short state, the rare short state, or the leak state is eliminated, the battery 3 and each of the batteries 3 and The electrical connection of the loads 17a ₁ and 17a _{2 to} 17e is kept interrupted, which is the same as the electrical system 21 of the first embodiment.

With the electric component system 41 of the second embodiment having such a configuration, the same effect as that of the electric component system 21 of the first embodiment can be obtained. Moreover, according to the electrical system 41 of the second embodiment, as the parameters of the discriminating criteria for detecting the occurrence of a rare short or leakage, the resistance value R and the branch harnesses 19a ₁ of the electric system 41, 19a ₂ ～19E resistor Since the values Ra ₁ and Ra _{2 to} Re are used, it is possible to provide a reference value for accurately detecting the occurrence of a rare short circuit or a leak without being influenced by the fluctuation of the voltage of the battery 3.

Then, the electrical system 2 of the first and second embodiments
Common to 1 and 41, each load 17a ₁ , 17a_Two ~ 17
Current change amount ΔA and current change waveform pattern
Turn S, resistance R, and resistance Ra₁ , Ra_Two ~
Collect and store Re in RAM 25b by learning
Then, the vehicle user has an empty branch harness 19a.₁ , 19
a_Two ~ 19e is a spec not provided by the vehicle manufacturer.
If you connect an unknown load (not shown)
Current change ΔA due to normal operation of load with unspecified specifications
Or current change waveform pattern S, resistance value R, and resistance value
Ra₁ , Ra_Two ~ Re is acquired and stored in the RAM 25b
It is advantageous in that it can be performed.

The electrical system 21 of the first and second embodiments,
41, the learning period for collecting the current change amount ΔA, the current change waveform pattern S, the resistance value R, and the resistance values Ra ₁ , Ra _{2 to} Re for each of the loads 17a ₁ and 17a _{2 to} 17e is For example, considering that there is a load such as a defogger that is normally used only in a limited season, the period may be set separately for each load content. Further, the notification operation to the microcomputer 25 at the start of the learning period is omitted, or the notification operation to the microcomputer 25 at the end of the learning period is omitted, and the microcomputer 2 at the start of the learning period is omitted.
From the notification to 5, the learning period may be automatically ended, for example, after a predetermined period has elapsed or after the vehicle has traveled for a predetermined distance.

In addition, the electrical system 2 of the first and second embodiments
1 and 41, the current sensor 23b and the voltage sensor 23d are connected to the loads 17a ₁ and 17a ₂ to ₁ rather than the main relay 23a.
The main sensors are arranged at seven main harnesses on the 7e side, but the current sensor 23b and the voltage sensor 23d are arranged at seven main harnesses on the battery 3 side of the main relay 23a. It may be anywhere on the harness 7. Further, in the electric component systems 21 and 41 of the first and second embodiments, the microcomputer 25 is arranged in the R / B 23, but the arrangement of the microcomputer 25 is, for example, in the ignition switch 5 or J / B 15, or Ignition switch 5, J / B15, and
In another part which is not inside of R / B23, etc.
Optional.

In the electrical system 41 of the second embodiment,
Each load 17a adopted₁ , 17a _Two ~ 17e actuation,
Configuration for detecting outages and reference data obtained by learning
Load 17a₁ , 17a_Two ~ 17e tight
The configuration for linking with the RAM and storing it in the RAM 25b is
It may be omitted. On the contrary, in the electrical system 21 of the first embodiment,
May be adopted.

Similarly, the amount of current change ΔA and the current change waveform pattern S described in the explanation of the electrical system 21 of the first embodiment.
Loads 17a ₁ and 17a for collection by learning
The operations of _{2 to} 17e are independently performed one by one according to a predetermined order, and the load 17a corresponding to the order is performed.
_1, 17a _{2 ~17e} of the name, or, a title consisting of a symbol and number, and the like, linked to the reference data RAM25b
The method of storing in the above can also be applied to the learning process in the electrical equipment system 41 of the second embodiment. Then, in that case, as described above, each of the loads 17a ₁ and 17a _{2 -1} .
It is possible to omit the configuration for detecting the operation and stop of 7e.

Further, in the electrical equipment system 41 of the second embodiment, the resistance value R of the electrical equipment system 41 and each branch harness 19a.
_Although both the resistance values Ra ₁ and Ra _{2 to} Re of ₁ and 19a _{2 to} 19e are stored in the RAM 25b as reference data, one of them may not be stored. Then, in the case of a configuration for storing only the resistance value R of the electric system 41 to RAM25b as reference data, the operation of the loads 17a _1, 17a ₂ ~17e, the configuration for detecting the stop, the load 17a _1, A structure for linking the names of 17a _{2 to} 17e or titles composed of symbols and numbers to the reference data and storing them in the RAM 25b, and the current sensors 23e of the respective branch harnesses 19a ₁ and 19a _{2 to} 19e. Both can be omitted. Other than this, it is possible that parts having different configurations or methods in the electrical system 21 of the first embodiment and the electrical system 41 of the second embodiment can be interchanged and applied. Needless to say.

In addition, the electrical system 2 of the first and second embodiments
In common with Nos. 1 and 41, each load 17a ₁ is collected and stored in the RAM 25b as reference data of a discrimination reference parameter for detecting the occurrence of a rare short circuit or a leak, or is used as an actual measurement value to be compared with this reference data. , 17a ₂
To 17e, the current change amount ΔA, the current change waveform pattern S, the resistance value R, and the resistance values Ra ₁ and Ra _{2 to} Re.
May not only be indirectly affected by the voltage change of the battery 3 due to the temperature change, but may also be directly affected by the temperature change and change themselves.

Therefore, when the reference data is collected and stored in the RAM 25b, the collected loads 17a ₁ and 17a are collected.
_{2 to} 17e, the current change amount ΔA, the current change waveform pattern S, the resistance value R, and the resistance values Ra ₁ and Ra _{2 to} R
e is not stored in the RAM 25b as it is, but the ambient temperature is detected by a temperature sensor, the collected reference data is stored in the RAM 25b together with the detected temperature, and the measured current variation ΔA for each load 17a ₁ , 17a _{2 to} 17e is stored.
And the current change waveform pattern S, the resistance value R, and the resistance values Ra ₁ , Ra _{2 to} Re, the ambient temperature detected at the time of verification and the detection at the time of collecting the reference data stored in the RAM 25b. Either the reference data or the actual measurement value may be corrected according to the difference from the temperature.

Alternatively, depending on the difference between the detected temperature and the reference temperature at the time of collecting the reference data, the collected loads 17a ₁ and 17a are collected.
_{2 to} 17e, the current change amount ΔA, the current change waveform pattern S, the resistance value R, and the resistance values Ra ₁ and Ra _{2 to} R
e is corrected and the reference data that is the value at the reference temperature is R
Each of the loads 17a ₁ and 17 actually measured by storing in the AM 25b
Current variation amount ΔA, current variation waveform pattern S, resistance value R, and resistance values Ra ₁ , Ra _{2 for} a _{2 to} 17e
Re is also corrected at the time of collation with the reference data stored in the RAM 25b in accordance with the difference between the ambient temperature and the reference temperature at the time of actual measurement, and is collated with the reference data of the RAM 25b as the actually measured value at the reference temperature. You may comprise.

[0126]

As described above, according to the method for constructing the abnormal current detection database for the vehicle wire harness of the present invention as set forth in claim 1, the power supply for connecting the vehicle battery and the plurality of loads respectively. Used when detecting whether or not an abnormal current has occurred in a plurality of wire harnesses for use in the abnormal current detection parameter indicating the content of the state change that occurs in each wire harness corresponding to the normal operation of each load In constructing a database that holds reference data, the load is operated, and a change in current between the battery and the wire harness when the load is operated is detected, and the detected battery and the wire harness are detected. The reference data relating to the wire harness to which the operated load is connected, based on a change in current between The reference data indexing and to be searchable managed by a predetermined title.

According to the vehicle wire harness abnormal current detection database constructing apparatus of the present invention as defined in claim 11, a plurality of wires for supplying electric power for respectively connecting a battery and a plurality of loads of the vehicle. Holds reference data of an abnormal current detection parameter, which is used when detecting whether or not an abnormal current has occurred in the harness, indicating the content of the state change that occurs in each of the wire harnesses corresponding to the normal operation of each of the loads. A device for constructing a database on a database holding means, wherein the battery current measuring means for measuring a current flowing between the battery and the wire harness, and the load based on the measured current of the battery current measuring means Battery current change detection for detecting a change in current flowing between the battery and the wire harness when the battery is operated. Means, and a reference value for calculating the reference data regarding the wire harness to which the operated load is connected, based on a change in the current flowing between the battery and the wire harness detected by the battery current change detection means. An indexing unit is provided, and the reference data indexed by the reference value indexing unit is linked to a predetermined title and stored in the database holding unit.

Therefore, the reference data regarding the wire harness to which the operated load is connected, which can be used as a reference value for detecting whether there is an abnormality such as a rare short circuit or a leak, is associated with the operation of the load. Since it is indexed and databased only by detecting the change in the current between the battery and the wire harness, it is necessary to check the specifications of the load and then build the reference data database beforehand. It can be constructed by a simple operation of omitting the operation of the load. Moreover, since the reference data can be searched by a predetermined title, the current change on the wire harness was obtained by actual measurement without knowing whether the wire harness had an abnormality such as a rare short circuit or a leak, and the index was calculated based on this. When anomaly detection is performed by collating data in an arbitrary form with reference data, it is possible to select reference data to be collated in accordance with the form of data obtained by actual measurement.

Further, according to the method for constructing the abnormal current detection database for a vehicle wire harness of the present invention, the operation of the load for determining the reference data is performed for a limited period. I did it.

According to the twelfth aspect of the present invention, there is further provided a learning period setting means for setting a learning period, and the reference value calculating means. However, the reference data of the wire harness corresponding to each load operated during the learning period is calculated.

For this reason, by limiting the period in which the load is operated for creating the database of the reference data, the construction completion time of the database is specified, and in order to detect the occurrence of an abnormality such as a rare short-circuit or leak of the wire harness. It is possible to clarify the start time when the reference data of the database can be referred to.

Further, according to the method of constructing the abnormal current detection database for a vehicle wire harness of the present invention, the reference data may be the one to which the loads are connected in association with the operation of each of the loads. It is the value of the normal current flowing in the wire harness at normal time, based on the change in the current between the detected battery and the wire harness, the current between the battery and the wire harness accompanying the operation of each load The amount of change in the above was calculated as the reference data.

According to the vehicle wire harness abnormal current detection database construction device of the present invention as defined in claim 13, the reference data is the connection of the loads in association with the operation of each of the loads. It is the value of the normal current flowing in the wire harness at normal time, the reference value indexing means, based on the change in the current flowing between the battery and the wire harness detected by the battery current change detection means,
The amount of change in the current flowing between the battery and the wire harness is determined as the reference data.

Therefore, it is possible to reduce the data amount per reference data and reduce the database capacity.

Further, according to the method of constructing the abnormal current detection database for a vehicle wire harness of the present invention, the reference data may be the one to which the load associated with the operation of each load is connected. It is a waveform pattern showing the change in the current of the wire harness, based on the change in the current between the battery and the detected wire harness, a waveform pattern showing the change in the current of the battery with the operation of each load. It was determined as the reference data.

According to the vehicle wire harness abnormal current detection database building apparatus of the present invention as defined in claim 14, the reference data is the connection of the loads associated with the operation of each of the loads. Is a waveform pattern showing the change in the current of the wire harness, the reference value indexing means,
Based on the change in the current flowing between the battery and the wire harness detected by the battery current change detecting means, a waveform pattern of the change in the current flowing between the battery and the wire harness is determined as the reference data. It was configured.

Therefore, when the load is a motor or the like, the current change occurring in the wire harness to which the load is connected changes with the passage of time even if an abnormality such as a rare short circuit or a leak does not occur. Also, a standard value with parameters that can reliably distinguish the normal current change on the wire harness due to the operation of the load from the occurrence of an abnormality such as a rare short circuit or a leak, and provide it when an abnormality is detected. You can

Furthermore, according to the method for constructing the abnormal current detection database for a vehicle wire harness of the present invention as defined in claim 5, the reference data is a resistance value between the battery and the wire harness. A battery that measures the voltage of the battery and that changes with the operation of each load based on the measured voltage of the battery and a change in the current A between the detected battery and the wire harness; The resistance value between the wire harness and the wire harness is calculated as the reference data.

According to the method of constructing a database for detecting abnormal current of a wire harness for a vehicle according to a sixth aspect of the present invention, the reference data is a resistance value of each wire harness during operation of each load. Is, while measuring the voltage of the battery, to measure the current of the corresponding wire harness when operating the load, based on the current of the measured wire harness and the voltage of the measured battery, The resistance value of each wire harness at the time of operation of each load is calculated as the reference data.

Further, according to the apparatus for constructing a database for detecting abnormal current of a wire harness for a vehicle of the present invention according to claim 15, there is further provided a battery voltage measuring means for measuring the voltage of the battery, and the reference data is A resistance value between the battery and the wire harness to which the load is connected due to the operation of each of the loads, the reference value indexing means, and the voltage of the battery measured by the battery voltage measuring means, A resistance value between the battery and the wire harness is determined as the reference data based on a change in the current flowing between the battery and the wire harness detected by the battery current change detection means. .

According to the construction apparatus for an abnormal current detection database for a wire harness for a vehicle of the present invention, the battery voltage measuring means for measuring the voltage of the battery and the current of the wire harness can be used. Further comprising a plurality of harness current measuring means for measuring, wherein the reference data is a resistance value of each wire harness at the time of operation of each load, and the reference value indexing means measures the battery voltage measuring means. The voltage of the battery,
The resistance value of each wire harness during operation of each load is calculated as the reference data based on the current of each wire harness measured by the harness current measuring means.

Therefore, even if the voltage of the battery fluctuates due to changes in the surrounding environment or the like, a reference value with parameters that can reliably detect the occurrence of an abnormality such as a rare short circuit or a leak without being affected by it is made into a database and It can be provided at the time of detection.

Further, according to the method for constructing the abnormal current detection database for a vehicle wire harness of the present invention described in claim 7, the reference data is set as the predetermined title.

According to the construction apparatus for an abnormal current detection database for a vehicle wire harness of the invention described in claim 17, the predetermined title is the reference data.

Therefore, it is possible to identify which load is associated with the current change on the connected wire harness, which is obtained by actual measurement without knowing whether the wire harness has an abnormality such as a rare short circuit or a leak. Even if it is not possible, reference data that matches or is close to the content of the data can be selected and searched for and provided for verification.

Further, according to the method of constructing the abnormal current detection database for a wire harness for a vehicle of the present invention as defined in claim 8, the load operated to determine the reference data is identified and identified. The reference data is managed using the load identification name as the predetermined title.

According to the apparatus for constructing a database for detecting abnormal current of a wire harness for a vehicle of the present invention according to claim 18, there is further provided an operating load identifying means for identifying the operated load, and the operating load identifying means is provided. Each time the reference value indexing means indexes the reference data relating to the wire harness to which a different load is connected, the identification name of the load identified by the operating load identifying means is identified by the reference value indexing means. The data is stored in the database holding means by linking with the reference data.

Therefore, when it is possible to identify which load is connected to the wire harness to which the current change generated on the wire harness is detected on the detection side of whether there is an abnormality such as a rare short circuit or a leak, By using the load connected to the specified wire harness as an address pointer, reference data to be collated can be selected, searched, and provided for collation.

Further, according to the method for constructing the database for detecting abnormal current of the wire harness for a vehicle of the present invention described in claim 9, the operation of the load for calculating the reference data is performed in a predetermined order. I did it all individually.

According to the vehicle wire harness abnormal current detection database building apparatus of the present invention, the battery current change detecting means may be configured to detect the abnormal current based on the measured current of the battery current measuring means. The change in the current flowing through the battery when the loads are individually operated according to a predetermined order is individually detected in the order of the operated loads.

Therefore, it is possible to collect all the minimum reference data that needs to be made into a database.

Further, according to the method for constructing the abnormal current detection database for a wire harness for a vehicle of the present invention described in claim 10, the identification name of the load corresponding to the order is set as the predetermined title. did.

According to the apparatus for constructing a database for detecting abnormal current of a wire harness for a vehicle according to the present invention, the predetermined title is an identification name of the load corresponding to the order. And

Therefore, when determining the reference data,
Even if the operated load cannot be directly identified, the reference data can be searched by the title by the corresponding load identification name.
Similar to the method of constructing the database for detecting abnormal current of the vehicle wire harness of the present invention described in, on the detection side of whether there is an abnormality such as a rare short circuit or a leak, which load is the current change generated on the wire harness. If it can be identified whether it is on the wire harness connected to, the load connected to the specified wire harness can be used as an address pointer to select and search the reference data for verification and provide it for verification. it can.

[Brief description of drawings]

FIG. 1 is a basic configuration diagram of an apparatus for constructing an abnormal current detection database for a vehicle wire harness according to the present invention.

FIG. 2 is an explanatory diagram of a vehicle electrical system including an apparatus for constructing an abnormal current detection database according to the first embodiment of the present invention.

3 is a block diagram of an electrical configuration of the microcomputer shown in FIG.

FIG. 4 is a memory area map of the RAM shown in FIG.

5 is a flowchart of a main routine showing a process performed by a CPU according to a control program stored in the ROM shown in FIG.

FIG. 6 is a flowchart of a subroutine showing the learning process of FIG.

7 is a flowchart of a subroutine showing the dead short detection processing of FIG.

FIG. 8 is a flowchart of a subroutine showing the rare short circuit and leak detection processing of FIG.

FIG. 9 is an explanatory diagram of a vehicle electrical system including an abnormal current detection database building device according to a second embodiment of the present invention.

10 is a block diagram of an electrical configuration of the microcomputer shown in FIG.

11 is a memory area map of the RAM shown in FIG.

12 is a flowchart of a main routine showing a process performed by a CPU according to a control program stored in the ROM shown in FIG.

13 is a flowchart of a subroutine showing the learning process of FIG.

FIG. 14 is a flowchart of a subroutine showing the dead short detection processing of FIG.

15 is a flowchart of a subroutine showing the rare short circuit and leak detection processing of FIG.

FIG. 16 is an explanatory diagram of a vehicle electrical system according to a conventional technique.

[Explanation of symbols]

 3 battery 6A to 6N wire harness 17A to 17N load 25 microcomputer 25a CPU 25b RAM 25c ROM 25bA database holding means 23b battery current measuring means 23d battery voltage measuring means 23e harness current measuring means 25A battery current change detecting means 25B reference value indexing Means 25C Working load identification means 26 Learning period setting means

Claims (20)

[Claims] 1. Corresponding to normal operation of each load, which is used when detecting whether or not an abnormal current has occurred in a plurality of wire harnesses for power supply that respectively connect a vehicle battery and a plurality of loads. In constructing the database holding the reference data of the abnormal current detection parameter indicating the content of the state change occurring in each wire harness, the load is operated, and the battery and the wire harness when the load is operated A change in current between the wire harness and the detected battery and the change in the current between the detected battery and the wire harness, the reference data relating to the wire harness to which the operated load is connected, The wire harness for vehicle characterized in that the calculated reference data is managed so as to be searchable by a predetermined title. Construction method of detecting an abnormal current database. 2. The method for constructing an abnormal current detection database for a vehicle wire harness according to claim 1, wherein the operation of the load for determining the reference data is performed for a limited period. 3. The reference data is a value of a normal current flowing through the wire harness to which the loads are connected in a normal state according to the operation of each of the loads, and the current between the detected battery and the wire harness. The abnormal current of the vehicle wire harness according to claim 1 or 2, wherein the amount of change in the current between the battery and the wire harness due to the operation of each load is determined as the reference data based on the change in How to build a detection database. 4. The reference data is a waveform pattern indicating a change in the current of the wire harness to which the loads are connected due to the operation of each of the loads, and the current between the detected battery and the wire harness. The vehicle according to claim 1, 2 or 3, wherein a waveform pattern showing a change in current between the battery and the wire harness due to the operation of each load is determined as the reference data based on a change in For constructing a database for detecting abnormal current in wire harnesses for automobiles. 5. The reference data is a resistance value between the battery and the wire harness, the voltage of the battery is measured, the measured battery voltage, the detected battery and the wire harness are measured. The resistance value between the battery and the wire harness, which changes with the operation of each load, is calculated as the reference data based on the change in the current between the two. A method of constructing a database for detecting abnormal current of a wire harness for a vehicle as described above. 6. The reference data is a resistance value of each wire harness during operation of each load, measures the voltage of the battery, and corresponds to the wire harness when the load is operated. The resistance value of each wire harness at the time of actuation of each load is calculated as the reference data based on the measured current of the wire harness and the measured voltage of the battery. 2. A method for constructing an abnormal current detection database for a vehicle wire harness according to 2, 3, or 4. 7. The method for constructing an abnormal current detection database for a vehicle wire harness according to claim 1, 2, 3, 4, 5, or 6, wherein the reference data is the predetermined title. 8. The reference data is managed by identifying the load operated to calculate the reference data, and using the identification name of the identified load as the predetermined title to manage the reference data. 4. A method of constructing a database for detecting abnormal current of a wire harness for a vehicle according to 4, 5, 6 or 7. 9. The operations of the load for calculating the reference data are all individually performed according to a predetermined order.
Alternatively, the method for constructing a database for detecting abnormal current of a wire harness for a vehicle according to 8. 10. The method for constructing an abnormal current detection database for a vehicle wire harness according to claim 9, wherein the identification name of the load corresponding to the order is the predetermined title. 11. Corresponding to normal operation of each load, which is used when detecting whether or not an abnormal current has occurred in a plurality of wire harnesses for power supply that respectively connect a vehicle battery and a plurality of loads. A device for constructing a database for holding reference data of an abnormal current detection parameter indicating the content of a state change occurring in each wire harness on a database holding means, which flows between the battery and the wire harness. A battery current measuring unit that measures a current, and a battery current that detects a change in the current flowing between the battery and the wire harness when the load is operated, based on the measured current of the battery current measuring unit. Change detection means, the current flowing between the battery and the wire harness detected by the battery current change detection means A reference value indexing means for indexing the reference data relating to the wire harness to which the operated load is connected, the reference data indexed by the reference value indexing means being assigned a predetermined title. An apparatus for constructing a database for detecting an abnormal current in a wire harness for a vehicle, characterized in that the database is stored in the database holding means. 12. A learning period setting means for setting a learning period is further provided, and the reference value calculating means calculates the reference data of the wire harness corresponding to each of the loads operated during the learning period. 11. An apparatus for constructing a database for detecting an abnormal current of a vehicle wire harness according to item 11. 13. The reference data is a value of a normal current flowing through the wire harness to which the loads are connected during normal operation due to the operation of each of the loads, and the reference value indexing means,
The change amount of the current flowing between the battery and the wire harness is determined as the reference data based on the change of the current flowing between the battery and the wire harness detected by the battery current change detecting means. 11
Alternatively, the device for constructing a database for detecting an abnormal current of a vehicle wire harness according to item 12. 14. The reference data is a waveform pattern showing a change in the current of the wire harness to which the loads are connected in association with the operation of each load, and the reference value indexing means detects the battery current change. 13. The waveform pattern of the change in the current flowing between the battery and the wire harness is determined as the reference data based on the change in the current flowing between the battery and the wire harness detected by the means. Or the construction device of the database for abnormal current detection of the vehicle wire harness according to 13 above. 15. A battery voltage measuring means for measuring the voltage of the battery is further provided, and the reference data is a resistance value between the battery and the wire harness to which the load is connected according to the operation of each of the loads. The reference value indexing means indicates the voltage of the battery measured by the battery voltage measuring means, and the change in the current flowing between the battery and the wire harness detected by the battery current change detecting means. The apparatus for constructing an abnormal current detection database for a vehicle wire harness according to claim 11, 12, 13 or 14, wherein a resistance value between the battery and the wire harness is calculated as the reference data. 16. A battery voltage measuring unit for measuring a voltage of the battery, and a plurality of harness current measuring units for measuring a current of the wire harness are further provided, and the reference data is obtained when the loads are operated. The resistance value of each wire harness, the reference value indexing means, based on the voltage of the battery measured by the battery voltage measuring means, and the current of each wire harness measured by the harness current measuring means, The apparatus for constructing an abnormal current detection database for a vehicle wire harness according to claim 11, 12, 13 or 14, wherein a resistance value of each wire harness during operation of each load is calculated as the reference data. 17. The apparatus for constructing an abnormal current detection database for a vehicle wire harness according to claim 11, 12, 13, 14, 15, or 16, wherein the predetermined title is the reference data. 18. An operating load identifying means for identifying the operated load is further provided, and each time the reference value indexing means indexes the reference data regarding the wire harness to which the operated load is connected, The identification name of the load identified by the operating load identification means is linked to the reference data calculated by the reference value indexing means, and is stored in the database holding means.
An apparatus for constructing a database for detecting an abnormal current of a wire harness for a vehicle according to 4, 15, 16 or 17. 19. The battery current change detecting means, based on the measured current of the battery current measuring means, changes in the current flowing through the battery when the loads are individually operated according to a predetermined order, The detection is individually performed in the order of the operated loads.
4. An apparatus for constructing a database for detecting an abnormal current of a vehicle wire harness according to 4, 15, 16, 17 or 18. 20. The apparatus for constructing an abnormal current detection database for a vehicle wire harness according to claim 19, wherein the predetermined title is an identification name of the load corresponding to the order.