CN103389419B - The sleep wake-up test device of onboard system - Google Patents

Abstract

The present invention provides a sleep wake-up testing device for a vehicle system, comprising: a control module that generates a corresponding control signal according to a preset control command; one or more automatic test channels connected to the control module. Under the control of the signal, switch the working/standby state of the on-board system under test connected to the automatic test channel, and detect the working current and standby current of the on-board system under test. The invention can improve the testing efficiency of the vehicle-mounted system, reduce the testing time and improve the testing accuracy.

Description

Sleep wake-up test device for in-vehicle systems

technical field

The invention relates to the testing technology of the vehicle system, in particular to a sleep wake-up test device of the vehicle system.

Background technique

At present, the application of in-vehicle systems is becoming more and more extensive, and the product functions are becoming more and more complex. With the continuous expansion of the scope of use of automobiles, the corresponding use environments are becoming more and more complex. Therefore, customers' quality requirements for automobiles and in-vehicle systems are also increasing. Higher and higher.

In the prior art, the on-board system is usually connected to the on-board power supply of the car, and is always in the power supply state, but is controlled by the corresponding work/standby control signal (ACC ON/OFF) when the car starts/stops. Due to the complexity of the product and the influence of the environment, when the car starts/stops, the on-board system may not be able to wake up or stand by normally, or even enter the standby state but the standby current is too large, which will continuously consume the power of the battery and cause the car to fail to start normally. .

In order to improve the reliability of the on-board system and improve the user experience of the product, it is necessary to test the on-board system in the process of R&D and production to test whether it can normally standby and wake up under the work/standby control signal, so as to ensure that the product can Normal operation, no failure will occur during the service life.

In the testing process of the existing technology, usually only one device under test can be tested at the same time, and the test efficiency is low. For example, in the test scenario of at least 3 samples, in order to simulate multiple standby and wake-ups that may occur during the product’s service life , it may take several months, and abnormal conditions cannot be monitored in real time during the test process, which affects test efficiency and test accuracy.

Contents of the invention

The technical problem to be solved by the present invention is to provide a sleep wake-up test device for a vehicle-mounted system, which can improve the test efficiency of the vehicle-mounted system and reduce the test time.

In order to solve the above-mentioned technical problems, the present invention provides a sleep wake-up testing device for a vehicle-mounted system, comprising:

The control module generates corresponding control signals according to preset control instructions;

One or more automatic test channels connected to the control module, under the control of the control signal, switch the working/standby state of the vehicle system to be tested connected to the automatic test channel, and detect the vehicle system to be tested Operating current and standby current of the system.

Optionally, each of the automated test channels includes:

A work/standby switch module, under the control of the control signal, provides a work/standby control signal to the vehicle system to be tested;

The current detection module supplies power to the on-board system to be tested, and detects the working current and standby current of the on-board system to be tested under the control of the control signal.

Optionally, the working/standby switching module includes:

The work/standby control signal input terminal receives the external work/standby control signal;

The work/standby control signal output end is connected to the vehicle-mounted system to be tested;

The first controllable switch, whose input end is connected to the input end of the working/standby control signal, and whose output end is connected to the output end of the working/standby control signal;

The first switch control module is connected to the control terminal of the first controllable switch, and switches the on/off state of the first controllable switch according to the control signal.

Optionally, the current detection module includes:

The power supply signal input terminal receives an external power supply signal;

The power supply signal output terminal is connected to the vehicle-mounted system to be tested;

a second controllable switch, the input end of which is connected to the input end of the power supply signal;

A working current sampling resistor, the first end of which is connected to the output end of the second controllable switch, and the second end thereof is connected to the output end of the power supply signal;

a third controllable switch, the input end of which is connected to the input end of the power supply signal;

A standby current sampling resistor whose first terminal is connected to the output terminal of the third controllable switch, and whose second terminal is connected to the output terminal of the power supply signal, and the resistance value of the standby current sampling resistor is greater than that of the working current sampling resistor. resistance value of the resistor;

The second switch control module is connected to the control terminals of the second controllable switch and the third controllable switch, and under the control of the control module, when the vehicle-mounted system to be tested is switched to the working state, control the The second controllable switch is turned on and the third controllable switch is controlled to be turned off. When the vehicle system to be tested is switched to the standby state, the second controllable switch is controlled to be turned off and the third switch conduction;

The current measurement module measures the voltage values of the working current sampling resistor and the standby current sampling resistor and converts them into current values.

Optionally, the current detection module also includes:

The fourth controllable switch has its input terminal connected to the power supply signal input terminal, its output terminal connected to the power supply signal output terminal, and its control terminal connected to the second switch control module;

Under the control of the control module, the second switch control module first controls the third controllable switch to be turned off and the fourth controllable switch to be turned on when the vehicle-mounted system to be tested switches from the standby state to the working state. turn on, and then control the fourth controllable switch to turn off and the second controllable switch to turn on; The fourth controllable switch is turned on, and then the fourth controllable switch is controlled to be turned off and the third controllable switch is turned on.

Optionally, the test device further includes: a power supply module, configured to generate the power supply signal.

Optionally, the control module includes:

A working/standby switching control submodule is connected to and controls the working/standby switching module;

The current detection control sub-module is connected with the current detection module and controls it.

Optionally, the control module also includes:

The recording sub-module is connected with the current detection control sub-module, and obtains and records the operating current and the standby current of the vehicle system to be tested.

Optionally, the content recorded by the recording sub-module includes: the device serial number of the vehicle-mounted system to be tested and its operating current and standby current.

Optionally, the control module also includes:

The display submodule displays the content recorded by the recording submodule.

Optionally, the control module also includes:

The determination sub-module compares the operating current and standby current of the vehicle system to be tested with the preset standard current to determine the test result.

Compared with the prior art, the present invention has the following advantages:

The sleep wake-up test device of the vehicle-mounted system of the embodiment of the present invention includes one or more automatic test channels, and the control module can generate corresponding control signals according to preset control instructions, and control each automatic test channel to switch the work/test of the vehicle-mounted system to be tested. Standby state to detect the working current and standby current in the corresponding state. Among them, the user can set parameters such as the number of working/standby state switching cycles of each automatic test channel in the control command, so that the sleep wake-up test device can perform automatic tests on multiple vehicle-mounted systems to be tested in parallel.

Furthermore, the sleep wake-up testing device of the vehicle-mounted system in the embodiment of the present invention can also record, compare and judge the measured working current and standby current, so as to facilitate timely troubleshooting and troubleshooting.

Description of drawings

Fig. 1 is the overall structural block diagram of the sleep wake-up testing device of the vehicle-mounted system of the embodiment of the present invention;

Fig. 2 is the structural block diagram of the working/standby switching module in the automatic test channel in Fig. 1;

Fig. 3 is the structural block diagram of the current detection module in the automatic test channel in Fig. 1;

FIG. 4 is a detailed structural block diagram of the control module in FIG. 1 .

detailed description

The present invention will be further described below in conjunction with specific embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

Fig. 1 shows the overall structural block diagram of the sleep wake-up testing device of the vehicle-mounted system of the present embodiment, including: a control module 11, which generates corresponding control signals according to preset control instructions; The test channel 12, under the control of the control signal, switches the working/standby state of the on-board system 13 to be tested connected to the automatic test channel 12, and detects the working current and standby current of the on-board system 13 to be tested. In addition, the sleep-wake test device of this embodiment may further include a power supply module (not shown in the figure) for generating a power supply signal provided to the vehicle system 13 to be tested.

In a specific embodiment, the user can set the control command through software programming, writing to the flash memory, etc., so as to determine the switching times and working conditions of the working/standby state of the automatic test channel 12 for each vehicle-mounted system 13 to be tested. For parameters such as the standard value of the standby current, the control module 11 converts the control command used for setting into a corresponding control signal, and controls each automatic test channel 12 to perform the test.

In this embodiment, the control instructions in the control module 11 can be independent for different automatic test channels 12, that is, different automatic test channels 12 can set different test parameters. Of course, those skilled in the art should also understand that in other specific embodiments, the control module 11 can also control the automatic test channels 12 to work synchronously, that is, different automatic test channels 12 can set exactly the same test parameters.

It should be noted that Fig. 1 is only a non-limiting example, wherein the number of automatic test channels 12 is 3, and in other specific embodiments, the number can be adjusted according to actual needs, such as 4, 5, etc. .

Wherein, each automatic test channel 12 comprises: work/standby switch module, is connected with control module 11, under the control of the control signal that it produces, provides work/standby control signal to the vehicle-mounted system 13 to be tested; The vehicle-mounted system 13 to be tested supplies power, and under the control of the control module 11, its operating current is detected when the vehicle-mounted system 13 to be tested is in a working state, and its standby current is detected when the vehicle-mounted system 13 to be tested is in a standby state. A detailed description will be given below with reference to FIG. 2 and FIG. 3 .

With reference to Fig. 2, Fig. 2 has shown the structural block diagram of the work/standby switching module 14 in the automatic test channel, comprise: work/standby control signal input end 141, receive external work/standby control signal; Work/standby control signal output Terminal 142 is connected with the vehicle-mounted system to be tested; the first controllable switch 143, its input terminal is connected with the work/standby control signal input terminal 141, and its output terminal is connected with the work/standby control signal output terminal 142; the first switch control module 144, connected to the control terminal of the first controllable switch 143, switching the on/off state of the first controllable switch 143 according to the control signal.

Wherein, the work/standby control signal is used to simulate the signal used to control the vehicle system to enter the work/standby state in the car, and can be generated by various signal generators in the prior art.

As a non-limiting example, the first controllable switch 143 is a relay in this embodiment, and its on/off state is controlled by the first switch control module 144 . Correspondingly, the first switch control module 144 may specifically include a relay driver 144a for controlling the relay, and an analog-to-digital converter 144b connected to the relay driver 144a, and the analog-to-digital converter 144b performs a control signal from the control module. The analog-to-digital conversion uses the converted control signal to drive the relay driver 144a, and then controls the on and off of the relay.

With reference to Fig. 3, Fig. 3 has shown the detailed structural block diagram of the current detection module 15 in the automatic test channel of the present embodiment, comprise: power supply signal input end 151, receive external power supply signal; The vehicle system is connected; the second controllable switch 153, its input end is connected with the power supply signal input end 151; the working current sampling resistor 156, its first end is connected with the output end of the second controllable switch 153, and its second end is connected with the power supply signal input end 151; The signal output terminal 152 is connected; the third controllable switch 154, its input terminal is connected with the power supply signal input terminal 151; the standby current sampling resistor 157, its first terminal is connected with the output terminal of the third controllable switch 154, and its second terminal Connected to the power supply signal output terminal 152, the resistance value of the standby current sampling resistor 157 is greater than the resistance value of the working current sampling resistor 156; the second switch control module 158 is connected to the control terminal of the second controllable switch 153 and the third controllable switch 154 connected, under the control of the control module (that is, the control module 11 in FIG. 1 ), when the vehicle-mounted system to be tested is switched to the working state, the second controllable switch 153 is controlled to be turned on and the third controllable switch 154 is controlled to be turned off. When the on-board system to be tested is switched to the standby state, control the second controllable switch 153 to turn off and control the third controllable switch 154 to be turned on; the current measurement module 159 measures the voltage of the working current sampling resistor 156 and the standby current sampling resistor 157 value and convert it to the corresponding current value.

As a preferred embodiment, the current detection module 15 in this embodiment also includes a fourth controllable switch 155, whose input end is connected to the power supply signal input end 151, whose output end is connected to the power supply signal output end 152, and whose control end Link to the second switch control module 158; The second switch control module 158 is under the control of the control module, when the vehicle-mounted system to be tested is switched from the standby state to the working state, firstly control the third controllable switch 154 to turn off, the fourth controllable switch The control switch 155 is turned on, and then the fourth control switch 155 is controlled to be turned off, and the second control switch 153 is turned on; 1. The fourth controllable switch 155 is turned on, and then the fourth controllable switch 155 is controlled to be turned off, and the third controllable switch 154 is turned on.

The fourth controllable switch 155 can play a transitional role when the state of the vehicle-mounted system to be tested is switched to maintain continuity. Of course, in other specific embodiments, the fourth controllable switch 155 can also be omitted.

Wherein, the power supply signal received by the power supply signal input terminal 151 may come from a power supply module inside the test device, or may also come from an external power supply module, for supplying power to the vehicle-mounted equipment to be tested.

The second controllable switch 153, the third controllable switch 154 and the fourth controllable switch 155 can also be implemented by using relays in this embodiment. Correspondingly, the second switch control module 158 can include required relay drivers, Components such as digital-to-analog converters are used to receive control signals from the control module and switch the on-off status of the relays according to the control signals.

When the vehicle-mounted system to be tested is switched to the working state (through the working/standby switching module 14 in FIG. The working current sampling resistor 156 and the power supply signal output terminal 152 flow into the vehicle-mounted device to be tested, and the current measurement module 159 can convert the corresponding working current according to the resistance value of the working current sampling resistor 156 by measuring the voltage across the working current sampling resistor 156 .

Similarly, when the in-vehicle system to be tested is switched to the standby state (through the working/standby switching module 14 in FIG. The switch 154, the standby current sampling resistor 157 and the power supply signal output terminal 152 flow into the vehicle-mounted device to be tested, and the current measurement module 159 can convert the voltage at both ends of the standby current sampling resistor 157 according to the resistance value of the standby current sampling resistor 157 into corresponding working current.

Usually, the standby current is much smaller than the working current. For example, the standby current is generally at the milliamp level, while the working current is at the ampere level. Therefore, in order to improve the accuracy of the test, the resistance value of the standby current sampling resistor 157 is higher than that of the working current sampling. The resistance value of the resistor 156 is large, for example, the multiple of the resistance value can be hundreds to thousands of times, so as to amplify the voltage across the standby current sampling resistor 157 and improve the measurement accuracy.

Fig. 4 shows the structural block diagram of the control module 11 in the testing device of the present embodiment, comprises: work/standby switch control submodule 111, is connected with the work/standby switch module 14 among Fig. 2 (for example, can be connected with Fig. 2 The first switch control module 144 in is connected) and controls it; the current detection control sub-module 112 is connected with the current detection module 15 in FIG. 3 (for example, it can be connected with the second switch air module 158 and current The measurement module 159 is connected) and controls it; the recording submodule 113 is connected with the current detection control submodule 112, and the working current and standby current of the vehicle-mounted system to be tested are obtained and recorded through the current measurement module 159 in FIG. 2 The display submodule 114 displays the content of the recording submodule 113; the determination submodule 115 compares the operating current and standby current of the vehicle-mounted system to be tested with the preset standard current to determine the test result.

Wherein, the recorded content of the record submodule record 113 can include data such as the device number, operating current, and standby current of the vehicle-mounted device to be tested connected to the automatic test channel, and the recorded file format can be TXT format or other appropriate file formats . The frequency of the data recorded by the recording sub-module 113 is related to the frequency at which the current detection control sub-module 112 obtains the working current and the standby current. In this embodiment, the frequency of obtaining the current can be selected within the range of 0.1 Hz-1 Hz.

After the judging sub-module 115 makes the judgment, if the test fails, an alarm can also be issued, and the alarm can also be displayed through the display sub-module 114 .

The display sub-module 114 can directly display data such as the recorded device number, current, and the number of tests that have been cycled so far, and can also draw the test results into a curve for display, so that users can view them. For example, the number of working/standby state switching completed by each vehicle-to-be-tested device can be displayed separately, and the number of failed cycles can be displayed under the test curve of each vehicle-to-be-tested device.

Still referring to Fig. 1, in a specific embodiment, the control module 11 can be implemented by a personal computer (PC), and the automatic test channel 12 can be implemented by a programmable logic device, etc. interface for data exchange. Of course, those skilled in the art should understand that in other specific embodiments, the control module 11 may also be implemented by an embedded system having a storage device, a display device, and a processing device.

To sum up, the testing device of this embodiment can test one or more vehicle-mounted devices, and the whole testing process is automatically completed according to preset control instructions, which can significantly improve testing efficiency and testing accuracy.

Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection should be based on the scope defined by the claims of the present invention.

Claims (9)

1. A sleep wake-up testing device for a vehicle-mounted system, characterized in that, comprising: The control module generates corresponding control signals according to preset control instructions; One or more automatic test channels connected to the control module, under the control of the control signal, switch the working/standby state of the vehicle system to be tested connected to the automatic test channel, and detect the vehicle system to be tested The operating current and standby current of the system; Each of these automated test channels includes: A work/standby switch module, under the control of the control signal, provides a work/standby control signal to the vehicle system to be tested; and A current detection module, which supplies power to the on-board system to be tested, and detects the working current and standby current of the on-board system to be tested under the control of the control signal; Wherein the current detection module includes: The power supply signal input terminal receives an external power supply signal; The power supply signal output terminal is connected to the vehicle-mounted system to be tested; a second controllable switch, the input end of which is connected to the input end of the power supply signal; A working current sampling resistor, the first end of which is connected to the output end of the second controllable switch, and the second end thereof is connected to the output end of the power supply signal; a third controllable switch, the input end of which is connected to the input end of the power supply signal; A standby current sampling resistor whose first terminal is connected to the output terminal of the third controllable switch, and whose second terminal is connected to the output terminal of the power supply signal, and the resistance value of the standby current sampling resistor is greater than that of the working current sampling resistor. resistance value of the resistor; The second switch control module is connected to the control terminals of the second controllable switch and the third controllable switch, and under the control of the control module, when the vehicle-mounted system to be tested is switched to the working state, control the The second controllable switch is turned on and the third controllable switch is controlled to be turned off. When the vehicle system to be tested is switched to the standby state, the second controllable switch is controlled to be turned off and the third switch conduction; and The current measurement module measures the voltage values of the working current sampling resistor and the standby current sampling resistor and converts them into current values. 2. the sleep wake-up test device of vehicle-mounted system according to claim 1, is characterized in that, described work/standby switching module comprises: The work/standby control signal input terminal receives the external work/standby control signal; The work/standby control signal output end is connected to the vehicle-mounted system to be tested; The first controllable switch, whose input end is connected to the input end of the working/standby control signal, and whose output end is connected to the output end of the working/standby control signal; The first switch control module is connected to the control terminal of the first controllable switch, and switches the on/off state of the first controllable switch according to the control signal. 3. the sleep wake-up testing device of vehicle-mounted system according to claim 1, is characterized in that, described current detection module also comprises: The fourth controllable switch has its input terminal connected to the power supply signal input terminal, its output terminal connected to the power supply signal output terminal, and its control terminal connected to the second switch control module; Under the control of the control module, the second switch control module first controls the third controllable switch to be turned off and the fourth controllable switch to be turned on when the vehicle-mounted system to be tested switches from the standby state to the working state. turn on, and then control the fourth controllable switch to turn off and the second controllable switch to turn on; The fourth controllable switch is turned on, and then the fourth controllable switch is controlled to be turned off and the third controllable switch is turned on. 4. the sleep wake-up testing device of vehicle-mounted system according to claim 1 or 3, is characterized in that, also comprises: The power module is used to generate the power supply signal. 5. the sleep wake-up test device of vehicle-mounted system according to claim 1, is characterized in that, described control module comprises: A working/standby switching control submodule is connected to and controls the working/standby switching module; The current detection control sub-module is connected with the current detection module and controls it. 6. the sleep wake-up testing device of vehicle-mounted system according to claim 5, is characterized in that, described control module also comprises: The recording sub-module is connected with the current detection control sub-module, and obtains and records the operating current and the standby current of the vehicle system to be tested. 7. The sleep wake-up testing device of the on-board system according to claim 6, wherein the content recorded by the recording sub-module includes: the equipment number of the under-test on-board system and its operating current and standby current. 8. The sleep wake-up testing device of the vehicle-mounted system according to claim 6 or 7, wherein the control module further comprises: The display submodule displays the content recorded by the recording submodule. 9. the sleep wake-up testing device of vehicle-mounted system according to claim 5, is characterized in that, described control module also comprises: The determination sub-module compares the operating current and standby current of the vehicle system to be tested with the preset standard current to determine the test result.