CN207764333U - A vehicle grounding detection system - Google Patents

Abstract

The utility model discloses a kind of automobile-used bonding detecting systems, which is characterized in that including：Multiple bonding dots, multiple bonding dots include a bonding datum mark, and bonding datum mark is electrically connected by main ground strap with car battery cathode；A plurality of detection line is arranged in a one-to-one correspondence with multiple bonding dots, and detection line is electrically connected with corresponding bonding dots, and the detection line being electrically connected with bonding datum mark is detection datum line；Data processing module, including multiple detection ports, multiple detection ports correspond and are electrically connected with a plurality of detection line, data processing module obtains the bonding signal of each bonding dots and the bonding reference signal of bonding datum mark by a plurality of detection line respectively, judges that bonding dots whether there is failure according to the bonding reference signal of the bonding signal of bonding dots and bonding datum mark.The utility model embodiment, after realizing overall wire sheaves entrucking, the detection to the bonding dots of overall wire sheaves and body earth facilitates malfunction elimination, improves vehicle operational reliability.

Description

A vehicle grounding detection system

technical field

The embodiment of the utility model relates to a grounding detection technology, in particular to a vehicle grounding detection system.

Background technique

The ground wire is part of the circuit loop that makes up the car. The vehicle ground is usually directly connected to the body by the negative pole of the battery, so that the body becomes a large negative pole, and all the ground lines pass through the body ground. Therefore, the quality of the grounding point of the vehicle body is the key to the work of the automotive electronic control system and the automotive electrical device.

At present, the wiring harness of the whole vehicle is only tested offline after the wiring harness is processed, that is, the wire continuity test is performed before the wiring harness is processed and loaded. This detection method can ensure the conduction of the branches of the wires (including the ground wire) inside the wiring harness. sexual satisfaction.

However, the detection methods in the prior art can only ensure that the continuity of the branches of the wires inside the wiring harness meets the requirements, and cannot detect the conduction of the vehicle wiring harness with the ground point of the vehicle body after loading. In the subsequent vehicle debugging, it will bring difficulties to troubleshooting.

Utility model content

The utility model provides a vehicle grounding detection system to realize the detection of the grounding point of the vehicle wiring harness and the vehicle body grounding after the vehicle wiring harness is loaded, so as to facilitate troubleshooting.

The embodiment of the utility model provides a vehicle grounding detection system, the detection system includes:

Multiple grounding points, including a grounding reference point, the grounding reference point is electrically connected to the negative pole of the vehicle battery through the main grounding line;

A plurality of detection lines are set in one-to-one correspondence with multiple ground points, the detection lines are electrically connected to the corresponding ground points, and the detection line electrically connected to the ground reference point is the detection reference line;

The data processing module includes multiple detection ports, and the multiple detection ports correspond to multiple detection lines and are electrically connected. The data processing module obtains the grounding signal of each grounding point and the grounding reference point through multiple detection lines. According to the grounding reference signal of the grounding point and the grounding reference signal of the grounding reference point, it is judged whether there is a fault in the grounding point.

Wherein, the data processing module includes a data acquisition sub-module and a fault judgment sub-module;

The data acquisition sub-module is used to obtain the ground point voltage value of the ground point electrically connected to the detection line through the detection line, and obtain the ground reference point voltage value of the ground reference point through the detection reference line;

The fault judgment sub-module is used to detect that the absolute value of the voltage difference between the ground point voltage value of the ground point and the ground reference point voltage value of the ground reference point is greater than the voltage drop threshold corresponding to the ground point, It is judged that the grounding point is faulty.

Among them, the detection system also includes: a display module, which is electrically connected to the data processing module; the fault judgment sub-module is also used to record the location of the faulty grounding point when there is a fault at the grounding point, and to count the number of faulty grounding points and transmit them to the display module to display.

Wherein, the data processing module pre-stores the ground point fault number threshold, and the fault determination sub-module is also used to determine that the ground reference point has a fault when the number of faulty ground points is detected to be greater than or equal to the ground point fault number threshold.

Wherein, the fault number threshold is greater than or equal to 1/2 of the total number of grounding points.

Wherein, the data processing module pre-stores a plurality of voltage drop thresholds corresponding to a plurality of grounding points one-to-one.

Wherein, the data processing module and the display module are electrically connected through a CAN line.

Among them, the data processing module is also used to sequentially detect whether there is a fault in each ground point after the system is powered on, and control to disconnect the electrical connection between each ground point and the corresponding detection line after all the detection of multiple ground points is completed. .

Wherein, the detection system also includes: multiple vehicle wiring harnesses corresponding to multiple grounding points one by one, and the ground wire of each vehicle wiring harness is electrically connected to the corresponding grounding point.

Wherein, the vehicle wiring harness ground wire is electrically connected to the grounding point through the O-shaped terminal.

The vehicle grounding detection system provided by the embodiment of the utility model includes: a plurality of grounding points, a plurality of detection lines corresponding to the plurality of grounding points, and a data processing module. Set the grounding point connected to the vehicle body as the grounding reference point, where one end of the main grounding wire is connected to the negative terminal of the battery, and the other end is connected to the vehicle body. The grounding signal of each grounding point and the grounding reference signal of the grounding reference point are respectively obtained by the data processing module, and the grounding signal of the grounding point and the grounding reference signal of the grounding reference point are calculated and processed, and then judged Whether the ground point is faulty. The embodiment of the utility model solves the problem that the existing technology cannot detect the conduction between the vehicle wiring harness and the ground point of the vehicle body after loading, which brings difficulties to troubleshooting during subsequent vehicle debugging. After the vehicle wiring harness is loaded, the detection of the grounding point between the vehicle wiring harness and the body grounding is realized, which facilitates troubleshooting and improves vehicle operation reliability.

Description of drawings

FIG. 1 is a schematic structural diagram of a vehicle grounding detection system provided by Embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of a vehicle grounding detection system provided by Embodiment 2 of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail. It can be understood that the specific embodiments described here are only used to explain the utility model, rather than limit the utility model. In addition, it should be noted that, for the convenience of description, only some structures related to the present utility model are shown in the drawings but not all structures.

Embodiment one

FIG. 1 is a schematic structural diagram of a vehicle grounding detection system provided by Embodiment 1 of the present invention. This embodiment is applicable to the situation where fault detection is performed on each grounding point of the vehicle wiring harness after the vehicle wiring harness is loaded. The vehicle grounding detection system includes:

A plurality of grounding points 110, including a grounding reference point 111 in the plurality of grounding points 110, the grounding reference point 111 is electrically connected to the vehicle battery negative pole 150 through the main grounding line 140;

A plurality of detection lines 120 are provided in one-to-one correspondence with a plurality of ground points 110, the detection lines 120 are electrically connected to the corresponding ground points 110, and the detection line 120 electrically connected to the ground reference point 111 is the detection reference line 121; The processing module 130 includes a plurality of detection ports 131, and the plurality of detection ports 131 correspond to and are electrically connected to the plurality of detection lines 120. The data processing module 130 obtains the grounding signals of each grounding point 110 respectively through the plurality of detection lines 120 , and the grounding reference signal of the grounding reference point 111, according to the grounding signal of the grounding point 110 and the grounding reference signal of the grounding reference point 111, it is judged whether there is a fault in the grounding point 110.

In the automotive electrical system, the whole vehicle has a main ground wire 140, one end of which is connected to the battery negative terminal 150, and the other end is connected to the vehicle body 200. , forming a working loop. On the vehicle body 200, a plurality of ground points 110 are provided. Wherein, the grounding point 110 where the main grounding wire 140 is electrically connected to the battery negative pole 150 of the vehicle body 200 is the grounding reference point 111 . A plurality of detection lines 120 are provided in one-to-one correspondence with the plurality of ground points 110 for transmitting detection signals of each ground point 110 . Wherein, the detection line 120 electrically connected to the ground reference point 111 is the detection reference line 121 .

The data processing module 130 in the detection system is provided with multiple detection ports 131 , and the multiple detection ports 131 correspond to the multiple detection lines 120 one by one, and the multiple detection lines 120 are electrically connected to the data processing module 130 through the multiple detection ports 131 . When the vehicle is started, the vehicle ground detection system is powered on to detect each ground point 110 . The data processing module 130 obtains the ground signal of each ground point 110 through the detection line 120 corresponding to the ground point 110 , and obtains the ground reference signal of the ground reference point 111 through the detection reference line 121 .

With the use of the vehicle, each ground point 110 may be corroded, bolts loose, and covered with oil, etc. When the above situation occurs, the contact resistance of the ground point 110 will increase, and the voltage drop will increase accordingly. Therefore, the above-mentioned ground signals of each ground point 110 and the ground reference signal of the ground point 110 may be selected as voltage signals, for example, may be voltage values corresponding to each ground point 110 . After detecting the voltage value of each ground point 110 and the voltage value of the ground reference point 111, the data processing module 130 determines the voltage value of each ground point 110 according to the voltage value of each ground point 110 and the voltage value of the ground reference point 111. Is there a fault. For example, the detection system can be used to detect the voltage value of each ground point 110 after the wiring harness of the vehicle is loaded and before the vehicle leaves the factory, so as to determine the voltage difference range between each ground point 110 and the ground reference point 111 . When the voltage difference between a certain grounding point 110 and the grounding reference point 111 is too large, exceeding the range detected before leaving the factory, it can be determined that the grounding point 110 is faulty. Furthermore, timely warnings can be given to each fault point, so that the user can clean and treat each grounding point 110 in time according to the early warning at the early stage of corrosion of the grounding point 110, thereby improving the reliability of the vehicle operation.

On the basis of the above scheme, optionally, the vehicle detection system also includes: a plurality of vehicle wiring harnesses 160 corresponding to a plurality of grounding points 110 one by one, and the ground wire of each vehicle wiring harness 160 corresponds to its corresponding grounding point. Iron point 110 is electrically connected.

There are many vehicle wiring harnesses 160 in the vehicle, and each connection point between the vehicle wiring harness 160 and the vehicle body 200 corresponds to a grounding point 110 . Optionally, the ground wire of the vehicle wiring harness 160 is electrically connected to the ground point 110 through the O-shaped terminal 170 . A plurality of O-type terminals 170 are provided on the vehicle body 200 , and the ground wire of the vehicle wiring harness 160 is connected to the ground point 110 of the body 200 through the O-type terminals 170 , so that the contact between the ground wire and the ground point 110 is firmer.

The vehicle grounding detection system provided by the embodiment of the utility model includes: a plurality of grounding points, a plurality of detection lines corresponding to the plurality of grounding points, and a data processing module. The grounding point connected to the vehicle body is set as the grounding reference point, wherein one end of the main grounding line is connected to the battery negative terminal, and the other end is connected to the vehicle body. The grounding signal of each grounding point and the grounding reference signal of the grounding reference point are respectively obtained by the data processing module, and the grounding signal of the grounding point and the grounding reference signal of the grounding reference point are calculated and processed, and then judged Whether the ground point is faulty. The embodiment of the utility model solves the problem that the existing technology cannot detect the conduction between the vehicle wiring harness and the ground point of the vehicle body after loading, which brings difficulties to troubleshooting during subsequent vehicle debugging. After the wiring harness of the whole vehicle is loaded, the detection of the grounding point between the wiring harness of the whole vehicle and the ground iron of the vehicle body is realized, which is convenient for troubleshooting and improves the reliability of the vehicle operation.

Embodiment two

Fig. 2 is a schematic structural diagram of a vehicle grounding detection system provided by Embodiment 2 of the present invention. This embodiment is applicable to the situation where fault detection is performed on each grounding point of the vehicle wiring harness after the vehicle wiring harness is loaded. The vehicle grounding detection system includes:

A plurality of grounding points 110, including a grounding reference point 111 in the plurality of grounding points 110, the grounding reference point 111 is electrically connected to the vehicle battery negative pole 150 through the main grounding line 140;

A plurality of detection lines 120 are provided in one-to-one correspondence with a plurality of ground points 110, the detection lines 120 are electrically connected to the corresponding ground points 110, and the detection line 120 electrically connected to the ground reference point 111 is the detection reference line 121;

The data processing module 130 includes a plurality of detection ports 131, and the plurality of detection ports 131 are in one-to-one correspondence with the plurality of detection lines 120 and are electrically connected. signal, and the grounding reference signal of the grounding reference point 111, according to the grounding signal of the grounding point 110 and the grounding reference signal of the grounding reference point 111, it is judged whether the grounding point 110 has a fault.

Optionally, the data processing module 130 includes a data acquisition submodule 132 and a fault determination submodule 133;

The data acquisition sub-module 132 is used to obtain the ground point voltage value of the ground point 110 electrically connected to the detection line 120 through the detection line 120, and obtain the ground reference point of the ground reference point 111 through the detection reference line 121 Voltage value;

The fault judgment sub-module 133 is used to detect that the absolute value of the voltage difference between the ground point voltage value of the ground point 110 and the ground reference point voltage value of the ground reference point 111 is greater than the voltage corresponding to the ground point 110 When the threshold is lowered, it is determined that the ground point 110 is faulty.

Wherein, the data processing module 130 pre-stores a plurality of voltage drop thresholds corresponding to the plurality of grounding points 110 one-to-one.

Exemplarily, when the vehicle is started, the vehicle ground detection system is powered on and starts to detect each ground point 110 of the vehicle. For example, there are N ground points 110, which are ground points 1, 2, . . . N respectively. Wherein, the ground point 1 is connected to the battery negative pole 150 of the vehicle body 200 through the main ground wire 140 , which is the ground reference point 111 . Assume that the voltage drop fault thresholds of the grounding points 2, . . . N pre-stored in the data processing module 130 are U2a, U3a... UNa respectively. Optionally, the data acquisition sub-module 132 first obtains the ground reference point voltage value U1 of the ground reference point 111 through the detection reference line 121 electrically connected to the ground reference point 111, and obtains the voltage value U1 of the ground reference point 111 through the electrical connection corresponding to the ground reference point 2. The detection line of the grounding point 2 obtains the grounding point voltage value U2 of the grounding point 2, and transmits U1 and U2 to the fault judgment sub-module 133, and the fault judgment sub-module 133 compares the grounding reference point voltage value U1 of the grounding reference point 111 with the grounding The ground point voltage value U2 of iron point 2 is subtracted to find the absolute value, assuming that the obtained value is U2b. Then, by comparing the relationship between U2b and U2a, it is determined whether there is a fault at ground point 2. For example, when U2b>U2a, it can be determined that there is a fault at ground point 2; when U2b≤U2a, it can be determined that ground point 2 is normal and there is no fault. Then continue to detect the ground point 3 according to the above detection method until the detection of the ground point N is completed.

Optionally, the vehicle grounding detection system also includes: a display module 180 electrically connected to the data processing module 130; the fault determination sub-module 133 is also used to record the position of the faulty grounding point 110 when there is a fault at the grounding point 110 , and count the number of faulty grounding points 110 and transmit it to the display module 180 for display.

Optionally, the data processing module 130 is electrically connected to the display module 180 through a CAN line 190 .

Exemplarily, assuming that the fault determination sub-module 133 determines that there is a fault in the ground point 2 and the ground point 3, it can record that both the ground point 2 and the ground point 3 are faulty ground points, and transmit it to the display module 180 for display . Optionally, the display module 180 may be a touch screen. During the process of detecting each ground point 110 by the detection system, the fault judgment sub-module 133 is also used to count the number of fault points in real time. For example, when the detection system is just powered on, the number of faulty ground points 110 is initialized to 0. Along with the detection of each ground point 110 , the fault judging sub-module 133 adds 1 to the number of fault ground points each time a fault ground point is determined. Assuming that the fault determination sub-module 133 determines that there is a fault in the ground point 2 and the ground point 3, the fault determination sub-module 133 determines that the ground point 2 is a fault ground point, and adds 1 to the number of fault ground points, and determines that the ground point Point 3 is the faulty grounding point, and the number of faulty grounding points is added by 1, and finally the number of faulty grounding points (for example, 2) is counted and then transmitted to the display module 180 for display. That is, when there is a fault in grounding point 2 and grounding point 3 among the N grounding points 110, the display module 180 will display the corresponding positions of faulty grounding point 2 and faulty grounding point 3 and the number of faulty grounding points 2, and An exception alarm is issued.

Optionally, the display module 180 may include an input button, and the user may set the voltage drop threshold of each ground point 110 according to actual conditions. For example, before the vehicle leaves the factory, the vehicle grounding system performs multiple detections on each grounding point 110 of the vehicle, so as to determine the voltage drop threshold corresponding to each grounding point 110 according to the large data detected. The staff can input the voltage drop threshold corresponding to each ground point 110 on the display module 180 through the input button according to the determined voltage drop threshold; when the display module 180 is a touch screen, they can directly input each ground point Point 110 corresponds to the voltage drop threshold.

Optionally, the data processing module 130 pre-stores the grounding point 110 fault number threshold, and the fault determination submodule 133 is also used to determine the grounding point 110 fault number threshold when detecting that the number of faulty grounding points 110 is greater than or equal to the grounding point 110 fault number threshold. Iron reference point 111 is faulty.

Because the fault judgment of all ground points 110 is based on the absolute value of the pressure drop between the ground point 110 and the ground reference point 111, when the ground reference point 111 fails, the detection results of each ground point 110 will be different. is inaccurate, and most of the ground points 110 will be judged as faulty ground points. Therefore, the data processing module 130 may pre-store a threshold number of faulty ground points. When the fault determination sub-module 133 detects that the number of faulty ground points is greater than or equal to the threshold number of faulty ground points, it determines that the ground reference point 111 is faulty. Optionally, the fault number threshold is greater than or equal to 1/2 of the total number of grounding points 110 . That is, when the fault judging sub-module 133 determines that half or more than half of the ground points 110 are faulty, it determines that the ground reference point 111 is a faulty ground point, and sets the number of faulty ground points to 1. Then it is transmitted to the display module 180 for display. The fault number threshold can also be set through the display module 180 according to actual conditions.

Optionally, the data processing module 130 is also used to sequentially detect whether each ground point 110 is faulty after the system is powered on, and control to disconnect each ground point 110 from the corresponding The electrical connection of the detection line 120.

The vehicle ground detection system is a single-cycle detection, that is, each ground point 110 is detected sequentially after the power is turned on. After the diagnosis is completed, the data processing module 130 automatically disconnects the ground point detection line 120 to avoid high current when the vehicle is started and running. Impact on it can damage the module. This detection method can realize high-frequency detection whether each grounding point 110 has a fault, or will break down (such as the grounding point 110 is in the early stage of corrosion, or there is paint or dirt on the grounding point 110 when the wiring harness is loaded. ); and will not consume too much system power.

In the technical solution of this embodiment, the grounding point voltage value of each grounding point and the grounding reference point voltage value of the grounding reference point are obtained through the data acquisition sub-module; When the absolute value of the voltage difference between the point voltage value and the voltage value of the ground reference point of the ground reference point is greater than the voltage drop threshold corresponding to the ground point, it is determined that the ground point is faulty, and the fault point is transmitted to the display module for further analysis. display; and when the number of faulty grounding points is greater than the threshold of the number of faults, it is judged that the grounding reference point is faulty, which facilitates troubleshooting and provides a basis for eliminating faults caused by poor grounding. After the wiring harness of the whole vehicle is loaded, the detection of the grounding point of the wiring harness of the whole vehicle and the ground iron of the vehicle body is realized, which improves the reliability of the vehicle operation and further improves the detection accuracy.

Note that the above are only preferred embodiments of the present invention and the applied technical principles. Those skilled in the art will understand that the utility model is not limited to the specific embodiments described here, and various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the utility model. Therefore, although the utility model has been described in detail through the above embodiments, the utility model is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the utility model. The scope of the present invention is determined by the appended claims.

Claims (10)

1. a kind of automobile-used bonding detecting system, which is characterized in that including：

Multiple bonding dots, the multiple bonding dots include a bonding datum mark, and the bonding datum mark passes through main ground strap It is electrically connected with car battery cathode；

A plurality of detection line is arranged in a one-to-one correspondence with the multiple bonding dots, and the detection line is electrically connected with the corresponding bonding dots It connects, the detection line being electrically connected with the bonding datum mark is detection datum line；

Data processing module, including multiple detection ports, the multiple detection port correspond simultaneously with a plurality of detection line Electrical connection, the data processing module obtained respectively by a plurality of detection line each bonding dots bonding signal, with And the bonding reference signal of the bonding datum mark, according to the bonding of the bonding signal of the bonding dots and the bonding datum mark Reference signal judges that the bonding dots whether there is failure.

2. detecting system according to claim 1, which is characterized in that the data processing module includes data acquisition submodule Block and fault verification submodule；

The data acquisition submodule, the bonding dots for obtaining electrical connection corresponding with the detection line by the detection line Bonding dots voltage value, and pass through the detection datum line and obtain the bonding datum mark voltage value of the bonding datum mark；

The fault verification submodule, in the bonding dots voltage value and the bonding benchmark for detecting the bonding dots When voltage difference absolute value between the bonding datum mark voltage value of point is more than the bonding dots corresponding pressure drop threshold value, judgement should Bonding point failure.

3. detecting system according to claim 2, which is characterized in that further include：Display module, with the data processing mould Block is electrically connected；The fault verification submodule is additionally operable in the bonding dots there are when failure, record failure bonding dots position, with And it counts failure bonding dots quantity and is transmitted to the display module and shown.

4. detecting system according to claim 3, which is characterized in that prestore bonding dots in the data processing module Number of faults threshold value, the fault verification submodule are additionally operable to detecting that it is described that the failure bonding dots quantity is greater than or equal to When bonding dots number of faults threshold value, judge that there are failures for the bonding datum mark.

5. detecting system according to claim 4, which is characterized in that the number of faults threshold value is more than or equal to described The 1/2 of bonding dots total quantity.

6. detecting system according to claim 2, which is characterized in that prestored in the data processing module with it is described Multiple bonding dots multiple pressure drop threshold values correspondingly.

7. detecting system according to claim 3, which is characterized in that the data processing module and the display module it Between be electrically connected by CAN lines.

8. detecting system according to claim 1, which is characterized in that the data processing module is additionally operable in system electrification It detects each bonding dots successively afterwards and whether there is failure, and control disconnects after the completion of the multiple bonding dots all detection The electrical connection of each bonding dots and the corresponding detection line.

9. detecting system according to claim 1, which is characterized in that further include：A plurality of overall wire sheaves are taken with the multiple Iron spot corresponds, and the bonding dots that the ground wire of every overall wire sheaves is corresponding are electrically connected.

10. detecting system according to claim 9, which is characterized in that the overall wire sheaves ground wire passes through O-shaped terminal and institute State bonding dots electrical connection.