CN107491061B - A network automated test system and method for commercial vehicle OBD diagnostic equipment - Google Patents

Abstract

The present invention provides a network automated test system for commercial vehicle OBD diagnostic equipment, including: a main control device, a power control device, a CAN communication device and a tested OBD diagnostic equipment, wherein the main control device is based on the information sent by the tested OBD diagnostic equipment. Diagnosis request, select the corresponding test script to call the power control device to provide power for the tested OBD diagnostic device and call the CAN communication device to send the corresponding CAN diagnostic response message to the tested OBD diagnostic device, and the tested OBD diagnostic device receives the CAN communication device to send diagnosis response message and generate diagnosis result data. The invention also provides a network automatic testing method of the commercial vehicle OBD diagnostic equipment. The invention can automatically test the tested OBD diagnostic equipment in the simulated ECU environment at the early stage of vehicle development, does not depend on the real ECU environment, and can automatically execute test cases and result judgments, avoiding errors in manual testing and improving Test efficiency and precision.

Description

A network automated test system and method for commercial vehicle OBD diagnostic equipment

technical field

The invention relates to an automatic test system and a method thereof, in particular to a network automatic test system of commercial vehicle OBD diagnostic equipment and a method thereof.

Background technique

With the continuous development of automotive electronics technology, more and more electronic control units (ECUs) are deployed on commercial vehicles. ECUs cooperate with each other through CAN bus communication to form complex functional architectures and network topologies to achieve increasing functional configurations. At the same time, it also causes ECU to contain more faults, function configuration and detection items. At present, commercial vehicles are equipped with an on-board diagnostic system (OBD). The diagnostic equipment communicates with each ECU through the OBD diagnostic interface, and is used to realize functions such as vehicle fault reading, parameter configuration, program update, and vehicle self-inspection, which facilitates after-sales and maintenance of vehicles. .

While ensuring the correctness of ECU diagnostic communication, network testing requirements are also put forward for OBD diagnostic equipment to verify its consistency based on the diagnostic protocol, eliminate its interference with the diagnostic process, and ensure the accuracy of vehicle diagnostic results.

The current test method for OBD diagnostic equipment is to connect the diagnostic equipment with a real ECU, manually control the bus and hard wire excitation of the ECU, and verify the typical functions of the diagnostic equipment. However, this testing method is in the final stage of vehicle development. By integrating the diagnostic equipment into the real ECU and real vehicle environment, the correctness of the diagnostic request sent by the diagnostic equipment and the consistency of the diagnostic response display are verified. This test method has the following problems: it depends on the development progress of the ECU and the whole vehicle, and the intervention time is relatively late; in the real ECU environment, some fault codes and vehicle data are difficult to manufacture and cannot cover the forward test; in the real ECU environment, it cannot be covered Reverse testing such as negative response and abnormal response; manual verification is inefficient and cannot guarantee high precision and reliability requirements.

Contents of the invention

The technical problem to be solved by the examples of the present invention is to provide a network automated test system and method for commercial vehicle OBD diagnostic equipment that improves the testing efficiency of the OBD diagnostic equipment.

The technical scheme adopted in the present invention is:

An embodiment of the present invention provides a network automated test system for commercial vehicle OBD diagnostic equipment, including: a main control device, a power control device, a CAN communication device, and a tested OBD diagnostic device, wherein the main control device is used for The diagnostic database files of one or more ECUs generate test configuration information and test case information, and generate corresponding test scripts based on the generated test configuration information and the test case information; and in response to receiving the OBD diagnostic device under test The diagnostic request sent to diagnose the ECU, select the test script corresponding to the diagnostic service under test from the generated test scripts and execute the corresponding test script, generate various diagnostic responses corresponding to the diagnostic request and send The diagnostic response is sent to the CAN bus through the CAN communication device; the diagnostic file includes a diagnostic protocol and a diagnostic database related to the ECU, and the diagnostic request includes the simulated CAN message data corresponding to the diagnostic database The diagnostic response includes emulation CAN message data corresponding to the diagnostic request; the power control device is used to control the communication control device and supply power to the OBD diagnostic device under test through the communication control device; The CAN communication device is used to receive the diagnostic request and send it to the main control device and send the diagnostic response to the tested OBD diagnostic device; the tested OBD diagnostic device is used to send a diagnostic request to the CAN bus and analyze and process the received diagnostic response to obtain corresponding diagnostic result data; the main control device is also used to compare the received diagnostic result data with the expected result data represented by the diagnostic response , and generate a test report corresponding to the diagnosis result data based on the comparison result.

Optionally, it also includes: a communication control device, connected to the power control device, the CAN communication device and the OBD diagnostic device under test, for selectively connecting the The power provided by the power control device is provided to the OBD diagnostic device under test and selectively sends the diagnostic response sent by the CAN communication device to the OBD diagnostic device under test;

Optionally, the main control device includes a test management module, a test script execution module, a test script library module and a hardware control driver module, the test management module is configured to receive the diagnosis file and based on the received diagnosis The document generates test configuration information and test case information, and generates a test report based on the test results of the OBD diagnostic device under test; the test script library module is used to establish and store the diagnostic categories and corresponding diagnostic categories for diagnosing the ECU. Test case; the test script execution module is used to generate a test script according to the test configuration information configured by the test management module and the test case information, and determine from the generated test script to correspond to the diagnosis request and execute the corresponding test script to generate a diagnostic response in response to the diagnostic request; and to compare the received diagnostic result data with the preset response data and generate a corresponding test based on the comparison result result, and send the test result to the test management module; the hardware control driver module is used to control the power control device and the communication control device to provide power to the OBD diagnostic device under test and control the The CAN communication device receives the diagnosis request sent by the OBD diagnosis device under test and sends the diagnosis response to the OBD diagnosis device under test.

Optionally, the diagnostic category includes one or more of the following categories: ECU identification test, vehicle information reading test, dynamic data reading and writing test, fault code reading test, IO control and routine control test, program refresh Write tests and transport protocol tests.

Optionally, the ECU identification test includes one or more of the following test cases: positive response test, negative response traversal test, response timeout test and invalid response test; the vehicle information reading test includes the following test cases One or more: valid range traversal test, invalid data test, negative response traversal test, response timeout test and invalid response test; the dynamic data read and write test includes valid value range traversal test, negative response traversal test, response timeout test And invalid response test; Described fault code reading test comprises one or more in the following test cases: fault code traversal test, invalid fault code test, negative response traversal test, response timeout test and invalid response test; control and routine The control test includes one or more of the following test cases: control mode traversal test, control result traversal test, negative response traversal test, response timeout test and invalid response test; the program flashing test includes one or more of the following test cases A plurality of: flashing process test, failure mode processing test, security access algorithm test and flashing file reading test; the transmission protocol test includes one or more of the following test cases: single frame transmission test, multi-frame transmission test , Multi-frame receiving test and time parameter test.

Another embodiment of the present invention provides a network automated testing method for commercial vehicle OBD diagnostic equipment, including: generating test configuration information and test case information based on the diagnostic files of one or more ECUs, and based on the generated test configuration information and the generated test configuration information. The test case information generates a corresponding test script; the diagnosis document includes a diagnosis protocol and a diagnosis database relevant to the ECU; in response to receiving the diagnosis request that the ECU is diagnosed by the OBD diagnosis device under test, Determine a test script corresponding to the diagnosis request from the generated test scripts and execute the corresponding test script, generate a diagnosis response in response to the diagnosis request, and send the diagnosis response to the OBD under test Diagnosing equipment; the diagnosis request includes emulation CAN message data corresponding to the diagnosis database; the diagnosis response includes emulation CAN message data corresponding to the diagnosis request; in response to receiving the diagnosis response, The OBD diagnostic device under test analyzes and processes the diagnostic response to obtain corresponding diagnostic result data; receives the diagnostic result data and compares the received diagnostic result data with the preset response data represented by the diagnostic response comparison, and generate a corresponding test report based on the comparison results.

Optionally, the method further includes: during the transmission of the diagnostic response, interrupting the transmission of the diagnostic response, and interrupting the power supplied to the OBD diagnostic device under test.

Optionally, the diagnostic category includes one or more of the following categories: ECU identification test, vehicle information reading test, dynamic data reading and writing test, fault code reading test, IO control and routine control test, program refresh Write tests and transport protocol tests.

Optionally, the ECU identification test includes one or more of the following test cases: positive response test, negative response traversal test, response timeout test and invalid response test; the vehicle information reading test includes the following test cases One or more: valid range traversal test, invalid data test, negative response traversal test, response timeout test and invalid response test; the dynamic data read and write test includes valid value range traversal test, negative response traversal test, response timeout test And invalid response test; The fault code reading test includes one or more of the following test cases: fault code traversal test, invalid fault code test, negative response traversal test, response timeout test and invalid response test; the IO control And the routine control test includes one or more in the following test cases: control mode traversal test, control result traversal test, negative response traversal test, response timeout test and invalid response test; One or more of: flashing process test, failure mode processing test, security access algorithm test and flashing file reading test; the transmission protocol test includes one or more of the following test cases: single frame sending test, multiple Frame sending test, multi-frame receiving test and time parameter test.

Compared with the prior art, the network automated test system of the commercial vehicle OBD diagnostic equipment provided by the embodiment of the present invention can automatically diagnose the tested OBD diagnostic equipment of the diagnostic ECU in the initial stage of vehicle development in the simulated ECU environment, without relying on It is based on the real ECU environment, and can automatically execute test cases and result judgments, avoiding errors in manual testing, and improving testing efficiency and accuracy.

Description of drawings

Fig. 1 is the structural representation of the network automatic test system of commercial vehicle OBD diagnostic equipment provided by the embodiment of the present invention;

Fig. 2 is the structural representation of the main control device of the network automatic test system of commercial vehicle OBD diagnostic equipment provided by the embodiment of the present invention;

Fig. 3 is the structural representation of the test script library module of the master control device of the network automation test system of commercial vehicle OBD diagnostic equipment provided by the embodiment of the present invention;

FIG. 4 is a schematic flowchart of a network automated test system for commercial vehicle OBD diagnostic equipment provided by an embodiment of the present invention.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

Fig. 1 is the structural representation of the network automation test system of the commercial vehicle OBD diagnostic equipment provided by the embodiment of the present invention; Fig. 2 is the structural representation of the main control device of the network automatic test system of the commercial vehicle OBD diagnostic equipment provided by the embodiment of the present invention; Fig. 3 is a schematic structural diagram of the test script library module of the main control device of the network automation test system of the commercial vehicle OBD diagnostic equipment provided by the embodiment of the present invention.

As shown in Figure 1, the network automated test system of the commercial vehicle OBD diagnostic equipment provided by the embodiment of the present invention includes: a main control device 101, a power control device 102, a CAN communication device 103, a communication control device and a tested OBD diagnostic device 104 . Wherein, the main control device 101 is configured to generate test configuration information and test case information based on diagnostic database files of one or more ECUs, and generate corresponding test scripts based on the generated test configuration information and the test case information; and in response to receiving a diagnostic request for diagnosing the ECU sent by the OBD diagnostic device under test, determining a test script corresponding to the diagnostic request from the generated test scripts and executing the corresponding test script, Generate a diagnostic response in response to the diagnostic request, and send the diagnostic response to the CAN bus through the CAN communication device 103; the diagnostic file includes a diagnostic protocol and a diagnostic database related to the ECU, and the diagnostic request It includes simulated CAN message data corresponding to the ECU diagnosis database; the diagnosis response includes simulated CAN message data corresponding to the diagnosis request. The power control device 102 is used to control the communication control device and supply power to the OBD diagnostic device under test 104 through the communication control device. The CAN communication device 103 is configured to receive the diagnosis request and send it to the main control device 101 and send the diagnosis response to the OBD diagnosis device 104 . The OBD diagnostic device under test 104 is configured to send a diagnostic request to the CAN bus and analyze and process the received diagnostic response to obtain corresponding diagnostic result data. In addition, the main control device 101 is further configured to compare the received diagnostic result data with the preset response data represented by the diagnostic response, and generate a test report corresponding to the diagnostic result data based on the comparison result .

It should be noted that the diagnostic request sent by the OBD diagnostic device under test 104 can be operated manually, or can be sent through the control command of the main control device 101. In this case, the OBD diagnostic device under test 104 and the main control device Corresponding communication interfaces exist between 101. In addition, the diagnostic result data generated by the OBD diagnostic equipment under test can be read through the corresponding display terminal and input into the main control device 101, and can also be automatically sent to the main control device 101 through a USB interface or a serial port. It may be a display screen provided by the OBD diagnostic device 104 under test or an additionally configured display screen.

The network automated test system for commercial vehicle OBD diagnostic equipment provided by the embodiments of the present invention can automatically diagnose the tested OBD diagnostic equipment of the diagnostic ECU in the simulated ECU environment at the initial stage of vehicle development, including verifying the diagnosis of the tested OBD diagnostic equipment The consistency of request sending, diagnosis response processing and transmission protocol, the diagnosis does not depend on the real ECU environment, and can automatically execute test cases and result judgments, avoiding manual test errors and improving test efficiency and accuracy.

Specifically, as shown in FIG. 2 , the main control device may include a test management module, a test script execution module, a test script library module and a hardware control driver module.

Further, the test management module is configured to receive the diagnosis document and configure and manage information required for diagnosing the ECU based on the received diagnosis document, so as to generate the test configuration information and test case information , the configuration and management may specifically include: diagnostic database loading, simulation ECU configuration, test case configuration, test parameter configuration, managed diagnostic equipment under test, test record report management and tester management, etc., wherein the diagnostic document may be CDD or ODX format. In addition, the test management module is also used to generate a test report based on the diagnostic test results sent by the OBD diagnostic device under test and provide a user interface to display information such as test configuration, so that the user can perform corresponding operations. The test case information can be selected in the test script library module. If there is no test case corresponding to the ECU diagnosis document in the test script library module, it can be generated by creating a new one. In an example of the present invention, the test management module can be implemented by using Hengrun Technology INTA software.

Further, the test script execution module is configured to generate test scripts according to the test configuration information and test case information configured by the test management module, and select the test corresponding to the diagnosis request from the generated test scripts script and execute the corresponding test script, generating a diagnostic response in response to the diagnostic request. The test script compiles the test case corresponding to the diagnosis request into an executable program. In addition, the test script execution module also compares the diagnostic result data generated by the tested OBD diagnostic device 104 with the preset response data, and the comparison result includes: diagnostic request consistency, diagnostic data display consistency, abnormal prompt consistency, and Consistency in the diagnostic process. and generate corresponding test results based on the comparison results, and send the test results to the test management module, and the test management module embeds the test results into the test report template, thereby automatically generating a test report corresponding to the test results . When the test script execution module generates test scripts based on test configuration information and test case information, it can choose from the test script library module. If there is no test script corresponding to the test case of the ECU diagnostic document in the test script library module, it can Generated by way of new creation. The preset response data represented by the diagnostic response is the data obtained by running according to the preset logic and transmission protocol, that is, the test script execution module compares whether the tested OBD diagnostic device runs the CAN simulation data according to the preset logic and transmission protocol to verify the transmission protocol consistency. In an example of the present invention, the test script execution module can be executed by using software such as Vector CANoe.

Further, the test script library module, the test script is based on the program file written in the Vector CAPL language, and is used to establish and store the diagnosis categories and corresponding test cases for diagnosing the ECU. In an example of the present invention, as shown in FIG. 3 , the diagnostic categories established and stored by the test script library module include one or more of the following categories: ECU identification test, vehicle information reading test, dynamic data reading Write test, fault code read test, IO control and routine control test, program flash test and transmission protocol test. The ECU identification test includes one or more of the following test cases: positive response test, negative response traversal test, response timeout test and invalid response test; the vehicle information reading test includes one or more of the following test cases : Valid value field traversal test, invalid data test, negative response traversal test, response timeout test and invalid response test; the dynamic data reading and writing test includes valid value field traversal test, negative response traversal test, response timeout test and invalid response test ; The fault code reading test includes one or more of the following test cases: fault code traversal test, invalid fault code test, negative response traversal test, response timeout test and invalid response test; the IO control and routine control The test includes one or more of the following test cases: control mode traversal test, control result traversal test, negative response traversal test, response timeout test and invalid response test; the program flashing test includes one or more of the following test cases one: flashing process test, failure mode processing test, security access algorithm test and flashing file reading test; the transmission protocol test includes one or more of the following test cases: single frame sending test, multi-frame sending test, Multi-frame reception test and time parameter test. In this way, the network automated test system of the commercial vehicle OBD diagnostic equipment provided by the embodiment of the present invention can cover various diagnostic responses of the ECU, including reverse tests such as forward tests that cannot be covered in a real ECU environment, negative responses that cannot be covered, and abnormal responses. .

Further, the hardware control driver module is used to control the power control device and the communication control device to provide power to the OBD diagnostic device under test and control the CAN communication device to receive the OBD diagnostic device under test. The diagnostic request and sending the diagnostic response to the OBD diagnostic device under test may include a power control drive unit and a CAN bus drive unit. In an example of the present invention, the hardware control driver module can be implemented by using software such as Vector CANoe to call the driver of the power supply and the CAN communication device.

In addition, in an embodiment of the present invention, the network automated test system of the commercial vehicle OBD diagnostic equipment may also include a communication control device, one end of the communication control device is connected to the power control device 102 and the CAN communication device 103 connected, the other end is connected to the OBD diagnostic device under test 104, for selectively providing the power supply provided by the power control device 102 to the OBD diagnostic device under test based on the instructions sent by the main control device 101 104 and selectively send the diagnostic response sent by the CAN communication device 103 to the OBD diagnostic device 104 under test. Since the communication control device can be used to control the communication control device to control the on-off of the power supply and the CAN communication, the abnormal test of the CAN communication can be simulated.

In the present invention, the main control device 101 can be an industrial application computer or a PC. The power control device 102 can be a programmable power supply, such as the N6702 power supply from Keysight, and the power control device can be connected to a power supply device that provides 220V power to provide power for the entire system. CAN communication device 103 can be the CAN emulator that supports CAN communication, for example, the CAN box of Vector VN1640 that supports CANoe software, and communication control device can be the device that can carry out on-off operation to power supply and communication based on master control device 101, in this In an example of the invention, a bus test board and an IO control board may be included. In one example, the bus test board may be a model Vector VT2820 board, and the IO control board may be a NI control board, but not It is not limited to this. Among them, the main control device 101 can be connected with the power control device 102 through the Ethernet interface, and can be connected with the CAN communication device 103 through the USB interface. When the CAN communication device 103 is a CAN simulator, it can be connected with the CAN communication device through the USB interface 103 connections. The program-controlled power supply is connected to the power supply pin of the OBD diagnostic device 104 under test through the bus test board to supply power to the OBD diagnostic device 104 under test. Specifically, the bus test board has a plurality of input channels and output channels, and the input channel and the output channel Relays are arranged between them, some of the input channels are connected to the KL30, KL15 and GND pins of the program-controlled power supply, and the corresponding output channels are connected to the KL30, KL15 and GND pins of the OBD diagnostic device 104 under test, thereby providing the program-controlled power supply The power supplied to the OBD diagnostic device 104 under test. The CAN emulator is connected to the CAN bus of the tested OBD diagnostic device 104 through the bus test board, and performs diagnostic communication with it. Specifically, two input channels in the input channels of the bus test board are respectively connected to the CAN_H pin and the The CAN_L pin is connected, and the corresponding output channel is connected to the CAN_H pin and the CAN_L pin of the OBD diagnostic device 104 under test. The main control device 101 is connected to the NI control board through the PCI interface, and the NI control board controls the on-off of each channel of the bus test board through the IO pins based on the instructions sent by the main control device, thereby selectively turning the power control device 102 The provided power is provided to the OBD diagnostic device under test 104 and selectively sends the diagnostic response sent by the CAN communication device 103 to the OBD diagnostic device under test 104 . In an example of the present invention, the bus test board may include a power protection module, a relay matrix module, a load matching module and an indicator light, and the power protection module is used to limit the power supplied by the programmable power supply to protect The OBD diagnostic device under test 104, the relay matrix module controls the on-off operation of the relays arranged on the bus test board, and the load matching module is used for the CAN emulator and the tested The CAN communication configuration terminal load between the OBD diagnostic devices is measured, and the indicator light is used to indicate the input and output states of the bus test board.

In an exemplary embodiment, the test process of the network automated test system of the commercial vehicle OBD diagnostic equipment provided by the embodiment of the present invention may include the following steps:

Step 1. Configure the diagnostic database. Load one or more diagnostic protocol description diagnostic database files (CDD or ODX) containing relevant ECUs in the test management module.

Step 2: Configure the simulated ECU. Select the ECU to be simulated according to the loaded diagnostic database file, and one or more ECUs can be selected to establish a simulation diagnostic network test environment.

Step 3. Configure test cases and related parameters. The test management module selects executable test cases from the test script library module according to the configured simulation ECU, and the tester selects the test cases to be executed through the interface and configures test parameters: such as execution times, test depth, valid/invalid sub-services number of tests etc.

Step 4. Test the management configuration. Enter tester information through the interface of the test management module, such as tester name, department and level, etc.; enter the information of the diagnostic equipment under test, such as diagnostic equipment manufacturer, software and hardware version number, development stage, etc.; input test process management: such as test Time, number of test rounds and data storage path, etc.

Step five, generate a test script. After the test configuration is completed and distributed, the test script execution module selects and executes the test script from the test script library module according to the test configuration information and the test case information, and configures the test script parameters. Specifically, the test script execution module generates test cases and test scripts based on the diagnostic database, and then selects and executes corresponding test cases and test scripts from the test script library module based on the diagnostic request sent by the OBD.

Step 6: Compile the module and execute the test. After running the test script, the test execution module compiles the test script and automatically executes the test. During the test, it controls the power control module to provide power to the OBD diagnostic device under test and controls the CAN communication device to send a simulated diagnostic response to the OBD device under test.

Step seven, diagnosis result data record analysis. During the test execution process, the diagnostic result data generated by the tested OBD diagnostic equipment will be sent to the main control device through the USB interface or serial port, and the test execution module will automatically compare the diagnostic result data with the expected diagnostic result data, generate and display the test result, the test result Including PASS and FAIL.

Step 8: Generate a test report. The test execution module uploads the diagnostic result data and results to the test management module, and the test management module fills in the test results into the test report template and automatically generates the test report.

Based on the same inventive concept, the embodiment of the present invention also provides a network automated test method for commercial vehicle OBD diagnostic equipment. Since the principle of the problem solved by this method is similar to the aforementioned test system, the implementation of this method can refer to the aforementioned test system. implementation, the repetition will not be repeated.

Embodiments of the present invention also provide a network automated testing method for commercial vehicle OBD diagnostic equipment, as shown in Figure 4, the method includes the following steps:

S100. Generate test configuration information and test case information based on the diagnostic documents of one or more ECUs, and generate corresponding test scripts based on the generated test configuration information and the test case information; the diagnostic documents include information related to the ECU diagnostic protocol and diagnostic database;

S200. In response to receiving a diagnostic request for diagnosing the ECU sent by the OBD diagnostic device under test, determine a test script corresponding to the diagnostic request from the generated test scripts and execute the corresponding test script. , generating a diagnostic response in response to the diagnostic request, and sending the diagnostic response to the OBD diagnostic device under test; the diagnostic request includes emulation CAN message data corresponding to the ECU diagnostic database; the The diagnostic response includes simulated CAN message data corresponding to the diagnostic request;

S300. In response to receiving the diagnostic response, the OBD diagnostic device under test analyzes the diagnostic response to obtain corresponding diagnostic result data;

S400. Receive the diagnosis result data and compare the received diagnosis result data with the preset response data represented by the diagnosis response, and generate a corresponding test report based on the comparison result.

Further, the automatic testing method provided by this embodiment further includes the following steps: during the transmission of the diagnostic response, interrupting the transmission of the diagnostic response, and interrupting the power supplied to the OBD diagnostic device under test.

It should be noted that if the OBD diagnostic device under test does not receive a diagnostic command or the power supply is interrupted, it will give an abnormal prompt or alarm processing.

Further, the diagnostic category includes one or more of the following categories: ECU identification test, vehicle information reading test, dynamic data reading and writing test, fault code reading test, IO control and routine control test, program flashing testing and transport protocol testing.

Further, the ECU identification test includes one or more of the following test cases: positive response test, negative response traversal test, response timeout test and invalid response test;

The vehicle information reading test includes one or more of the following test cases: valid value range traversal test, invalid data test, negative response traversal test, response timeout test and invalid response test; the dynamic data read and write test includes valid Range traversal test, negative response traversal test, response timeout test and invalid response test;

The fault code reading test includes one or more of the following test cases: fault code traversal test, invalid fault code test, negative response traversal test, response timeout test and invalid response test;

The IO control and routine control tests include one or more of the following test cases: control pattern traversal test, control result traversal test, negative response traversal test, response timeout test and invalid response test;

The program flashing test includes one or more of the following test cases: flashing process test, failure mode processing test, security access algorithm test and flashing file reading test;

The transmission protocol test includes one or more of the following test cases: single frame transmission test, multi-frame transmission test, multi-frame reception test and time parameter test.

The above-mentioned steps can be realized by the above-mentioned devices, which will not be repeated here. And in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

The above-described embodiments are only specific implementations of the present invention, used to illustrate the technical solutions of the present invention, but not to limit them, and the protection scope of the present invention is not limited thereto, although the present invention has been described with reference to the foregoing embodiments Detailed description, those of ordinary skill in the art should understand: any person familiar with the technical field within the technical scope disclosed in the present invention can still modify the technical solutions described in the foregoing embodiments or can easily think of changes, Or perform equivalent replacements for some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (7)

1. A network automated testing system for commercial vehicle OBD diagnostic equipment, characterized in that, comprising: master control device, power control device, CAN communication device and tested OBD diagnostic equipment, wherein, The main control device is used to generate test configuration information and test case information based on the diagnostic files of one or more ECUs, and generate corresponding test scripts based on the generated test configuration information and the test case information; and in response to receiving To the diagnostic request for diagnosing the ECU sent by the OBD diagnostic device under test, select a test script corresponding to the diagnostic service under test from the generated test scripts and execute the corresponding test script, and generate a test script corresponding to the diagnostic service. Request various diagnostic responses and send the diagnostic responses to the CAN bus through the CAN communication device; the diagnostic files include diagnostic protocols and diagnostic databases related to the ECU, and the diagnostic requests include information related to the diagnostic database Corresponding simulated CAN message data in the above; the diagnostic response includes simulated CAN message data corresponding to the diagnostic request; The power control device is used to control the communication control device and supply power to the OBD diagnostic device under test through the communication control device; The CAN communication device is used to receive the diagnosis request and send it to the main control device and send the diagnosis response to the OBD diagnostic device under test; The OBD diagnostic device under test is used to send a diagnostic request to the CAN bus and analyze and process the received diagnostic response to obtain corresponding diagnostic result data; The main control device is further configured to compare the received diagnosis result data with the preset response data represented by the diagnosis response, and generate a test report corresponding to the diagnosis result data based on the comparison result. 2. The system according to claim 1, further comprising: The communication control device is connected with the power control device, the CAN communication device and the OBD diagnostic equipment under test, and is used to selectively switch the power provided by the power control device based on the instructions sent by the main control device providing the OBD diagnostic device under test and selectively sending the diagnostic response sent by the CAN communication device to the OBD diagnostic device under test. 3. system according to claim 2, is characterized in that, described master control device comprises test management module, test script execution module, test script library module and hardware control drive module, The test management module is configured to receive the diagnostic document and generate test configuration information and test case information based on the received diagnostic document, and generate a test report based on the test results of the OBD diagnostic device under test; The test script library module is used to establish and store diagnostic categories and corresponding test cases for diagnosing the ECU; The test script execution module is configured to generate a test script according to the test configuration information configured by the test management module and the test case information, and determine the test script corresponding to the diagnosis request from the generated test script And execute the corresponding test script, generate a diagnostic response in response to the diagnostic request; and compare the received diagnostic result data with the preset response data, and generate a corresponding test result based on the comparison result, and sending the test result to the test management module; The hardware control drive module is used to control the power control device and the communication control device to provide power to the OBD diagnostic equipment under test and control the CAN communication device to receive the diagnosis request sent by the OBD diagnostic device under test and sending the diagnostic response to the OBD diagnostic device under test. 4. The system according to claim 3, wherein the diagnostic category includes one or more of the following categories: ECU identification test, vehicle information reading test, dynamic data reading and writing test, fault code reading test , IO control and routine control test, program flash test and transmission protocol test. 5. The system according to claim 4, wherein the ECU identification test includes one or more of the following test cases: positive response test, negative response traversal test, response timeout test and invalid response test; The vehicle information reading test includes one or more of the following test cases: valid value range traversal test, invalid data test, negative response traversal test, response timeout test and invalid response test; the dynamic data read and write test includes valid Range traversal test, negative response traversal test, response timeout test and invalid response test; The fault code reading test includes one or more of the following test cases: fault code traversal test, invalid fault code test, negative response traversal test, response timeout test and invalid response test; The IO control and routine control tests include one or more of the following test cases: control pattern traversal test, control result traversal test, negative response traversal test, response timeout test and invalid response test; The program flashing test includes one or more of the following test cases: flashing process test, failure mode processing test, security access algorithm test and flashing file reading test; The transmission protocol test includes one or more of the following test cases: single frame transmission test, multi-frame transmission test, multi-frame reception test and time parameter test. 6. A network automated testing method for commercial vehicle OBD diagnostic equipment, characterized in that, comprising: Generate test configuration information and test case information based on diagnostic documents of one or more ECUs, and generate corresponding test scripts based on the generated test configuration information and the test case information; the diagnostic documents include diagnostics related to the ECU protocol and diagnostic database; In response to receiving the diagnostic request for diagnosing the ECU sent by the OBD diagnostic device under test, determining a test script corresponding to the diagnostic request from the generated test scripts and executing the corresponding test script, generating a response to The diagnostic response of the diagnostic request, and the diagnostic response is sent to the tested OBD diagnostic device; the diagnostic request includes the simulation CAN message data corresponding to the diagnostic database; the diagnostic response includes the corresponding Simulation CAN message data corresponding to the diagnosis request; In response to receiving the diagnostic response, the OBD diagnostic device under test analyzes the diagnostic response to obtain corresponding diagnostic result data; receiving the diagnosis result data and comparing the received diagnosis result data with the preset response data represented by the diagnosis response, and generating a corresponding test report based on the comparison result. 7. The method according to claim 6, further comprising: During the transmission of the diagnostic response, the transmission of the diagnostic response is interrupted, and the power supplied to the OBD diagnostic device under test is interrupted.