A testing method and system for real vehicle CAN network

Abstract

The present invention discloses a method and apparatus for testing a real vehicle CAN network. The method responds to a test start command input by a user, calls a preset test project, and calls a corresponding test environment based on the test project. A corresponding test message is sent to a node to be tested on the real vehicle according to the test project, and a test return message from the node to be tested is received and checked. If the test return message passes the check, the test return message is saved and displayed to the user. The present invention implements automated testing of nodes to be tested on the real vehicle CAN network through the preset test project. The implementation process is simple, fast, and low-cost. Furthermore, the test results obtained by the test project are more accurate than those obtained manually, with virtually no errors.

Description

Technical Field

[0001] The present invention relates to the field of automobile testing, and in particular to a testing method and system for a real vehicle CAN network Background Art

[0002] With the advancement of automotive technology and performance, users' demands for vehicle functionality continue to increase, and the number of controllers in vehicles is increasing, placing greater demands on on-vehicle network communications. The information exchange between the numerous controllers in a vehicle is achieved through a network consisting of the CAN bus. To make vehicles more intelligent and provide an ever-evolving user experience, the automotive industry needs to ensure the reliability and stability of vehicle networks. Therefore, pre-shipment network testing is essential, and industry requirements for testing are becoming increasingly stringent.

[0003] The existing technology mostly manually replaces the test node. Therefore, the disadvantages of the existing technology are that it is complicated to implement and requires repeated switching of the test interface line, which is inconvenient to implement, has low test efficiency, and inaccurate test results. Summary of the Invention

[0004] The present invention provides a method and system for testing a real vehicle CAN network, so as to achieve the technical effects of simple, fast, low-cost testing operation and improved accuracy of test results.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a method for testing a real vehicle CAN network, comprising the following steps:

[0006] In response to a test start instruction input by a user, calling a preset test project, and calling a corresponding test environment according to the test project;

[0007] The test environment is the CANoe environment required for testing the actual vehicle CAN network;

[0008] According to the test project, the corresponding test message is sent to the node to be tested of the actual vehicle, and the test return message of the node to be tested is received and checked. If the test return message passes the check, the test return message is saved and displayed to the user.

[0009] The embodiment of the present invention responds to the test start instruction input by the user, calls the preset test project, and calls the corresponding test environment according to the test project, sends the corresponding test message to the node to be tested of the actual vehicle according to the test project, receives and checks the test return message of the node to be tested, and if the test return message passes the inspection, saves the test return message and displays it to the user. Unlike the existing technology that requires manual switching of the test line interface and manual vehicle network testing, the technical solution of the present invention utilizes a preset test project to perform automated testing on the node to be tested of the actual vehicle according to the received test start instruction, and at the same time receives and checks the test results, and saves and displays the test return message that passes the inspection to the user. The embodiment of the present invention realizes automated testing of the node to be tested of the actual vehicle CAN network through a preset test project. The implementation process is simple, fast and low-cost, and the test results obtained by the test project are more accurate than those obtained manually, and almost no errors will occur.

[0010] Likewise, since the test project is preset and can be directly called, the test project can be reused. At the same time, the user can also make personalized adjustments to the test project as needed, so that the test project can be applied to various types of tests required by the user.

[0011] As a preferred example, the preset test project includes one or more of the following test combinations:

[0012] Physical layer test, data link layer test, interaction layer test, application layer test, fault tolerance test, communication fault test and diagnostic service test of the real vehicle CAN network.

[0013] The test project provided by the embodiment of the present invention includes but is not limited to testing various aspects of the physical layer, data link layer, interaction layer, application layer, fault tolerance, communication failures and diagnostic services of the actual vehicle CAN network. The embodiment of the present invention does not further limit the test items of the test project, and users can adjust them according to actual needs.

[0014] Likewise, in the embodiment of the present invention, adjusting a certain test in the test project will not affect other tests, and all tests included in the test project are independent and will not affect each other.

[0015] As a preferred example, the corresponding test environment is retrieved according to the test project, specifically:

[0016] The CANoe environment for testing the actual vehicle CAN network is retrieved according to the test project, and the test project is loaded into the CANoe environment for running, so that the test project is tested in the CANoe environment.

[0017] The embodiment of the present invention retrieves the test environment required for testing, namely the CANoe environment, based on the test project, and loads the test project into the CANoe environment for execution, so that the test project is tested in the CANoe environment. All tests included in the test project of the technical solution of the present invention can be tested by CANoe, realizing the free combination of multiple tests, and users can use CANoe to perform related tests as needed.

[0018] As a preferred example, the sending of the corresponding test message to the node to be tested of the actual vehicle according to the test project is specifically:

[0019] Determine the node to be tested corresponding to the actual vehicle CAN network according to the tests included in the test project, edit the tests included in the test project into corresponding test messages and send them to the corresponding node to be tested through CANoe and CANscope;

[0020] The node to be tested is an ECU node to be tested in the CAN network of a real vehicle.

[0021] The embodiment of the present invention determines the node to be tested corresponding to the actual vehicle CAN network by using the tests included in the retrieved test project, and edits the tests included in the test project into corresponding test messages, which are sent to the corresponding node to be tested via CANoe and CANscope. The technical solution of the present invention determines the node to be tested through a preset test project, and edits the corresponding test messages and sends them to the corresponding node via CANoe and CANscope. This is done automatically, eliminating the need for manual operation by the test engineer, saving manpower and material resources while also improving test efficiency.

[0022] Furthermore, the nodes under test provided by the embodiments of the present invention are actual vehicle ECU nodes. By directly testing these nodes, the technical solution provides more accurate test results that are closer to the actual values ​​generated by users operating the automotive product. With these test results, test engineers can make more precise adjustments to the product, ensuring that the final product better meets user needs and enhances user experience and comfort.

[0023] As a preferred example, the test project sends test messages to the corresponding node to be tested through CANoe and CANscope, specifically:

[0024] The test project is loaded through CANoe, and the CANoe realizes the sending of the test message and the receiving of the test return message through the network signal of the body controller on the actual vehicle;

[0025] The voltage waveform generated by the node to be tested during the actual vehicle CAN network test is collected by CANscope, and the physical characteristics of the actual vehicle are measured and analyzed based on the voltage waveform.

[0026] The CANoe provided by the embodiment of the present invention not only loads the required testing environment but also enables the monitoring and interaction of test messages. Simultaneously, the CANscope provided by the embodiment of the present invention measures and analyzes the physical characteristics of the actual vehicle by collecting the voltage waveforms generated by the nodes under test during the actual vehicle CAN network test. The CANoe and CANscope provided by the technical solution of the present invention jointly implement testing of the actual vehicle's physical layer, while CANoe, through message interaction, implements testing of the actual vehicle's CAN network, including the data link layer, interaction layer, application layer, fault tolerance, communication failures, and diagnostic services.

[0027] The technical solution of the present invention realizes most of the tests of the real vehicle CAN network through CANoe and CANscope, reduces the complexity of the test operation, and enables the test operation to be automated.

[0028] Accordingly, an embodiment of the present invention further provides a real vehicle CAN network testing system, the system comprising a test terminal, a multimeter, and an OBD interface circuit;

[0029] The test terminal is configured to respond to a test start command input by a user, retrieve a preset test project, retrieve a corresponding test environment according to the test project, and send a corresponding test message to a node to be tested on a real vehicle according to the test project, receive and check a test return message from the node to be tested, and if the test return message passes the check, save and display the test return message to the user; wherein the test environment is the CANoe environment required for testing the CAN network of a real vehicle;

[0030] The multimeter is used to test the physical layer of the CAN network of the actual vehicle;

[0031] The OBD interface circuit is used to connect the test terminal and the node to be tested of the real vehicle and to transmit test messages and test return messages.

[0032] The embodiment of the present invention provides a real vehicle CAN network testing system that does not require manual testing by the user and can automatically complete the test according to a preset test project. If the user needs to make modifications later, he can also make the modifications himself.

[0033] As a preferred example, the preset test project called by the test terminal includes one or more of the following test combinations:

[0034] Physical layer test, data link layer test, interaction layer test, application layer test, fault tolerance test, communication fault test and diagnostic service test of the real vehicle CAN network.

[0035] As a preferred example, the test terminal retrieves the corresponding test environment according to the test project, specifically:

[0036] The test terminal retrieves the CANoe environment for testing the actual vehicle CAN network according to the test project, loads the test project into the CANoe environment for execution, and performs the test in the CANoe environment;

[0037] The CANoe environment is integrated on the test terminal.

[0038] As a preferred example, the test terminal sends a corresponding test message to the node to be tested of the real vehicle according to the test project, specifically:

[0039] The test terminal determines the node to be tested corresponding to the real vehicle CAN network according to the tests included in the test project, edits the tests included in the test project into corresponding test messages and sends them to the corresponding node to be tested via CANoe, CANscope and OBD interface lines;

[0040] The node to be tested is an ECU node to be tested in the CAN network of a real vehicle.

[0041] As a preferred example, the test terminal is further used for:

[0042] The test project is loaded through CANoe, and the CANoe realizes the sending of the test message and the receiving of the test return message through the network signal of the body controller on the actual vehicle;

[0043] The voltage waveform generated by the node to be tested during the actual vehicle CAN network test is collected by CANscope, and the physical characteristics of the actual vehicle are measured and analyzed based on the voltage waveform. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 : A flow chart of an embodiment of a real vehicle CAN network testing method provided by the present invention;

[0045] Figure 2 : A flow chart of an embodiment of a method for activating a corresponding test environment according to a test project provided by the present invention;

[0046] Figure 3 : A flow chart of an embodiment of a method for sending a test message to a corresponding node to be tested provided by the present invention;

[0047] Figure 4 : A structural diagram of an embodiment of the test content included in a test project provided by the present invention;

[0048] Figure 5 : A structural diagram of an embodiment of a real vehicle CAN network testing system provided by the present invention. DETAILED DESCRIPTION

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0050] Example 1

[0051] Please refer to Figure 1 , which is a flow chart of an embodiment of a real vehicle CAN network testing method provided by an embodiment of the present invention, including steps 101 to 102, each of which is specifically as follows:

[0052] Step 101: In response to a test start instruction input by a user, a preset test project is retrieved, and a corresponding test environment is retrieved according to the test project.

[0053] In this embodiment, the test terminal calls a preset test project by responding to a test start instruction input by the user, and calls a corresponding test environment according to the test project, sends a corresponding test message to the node to be tested of the actual vehicle according to the test project, receives and checks the test return message of the node to be tested, and if the test return message passes the check, saves the test return message and displays it to the user. Unlike the prior art which requires manual switching of the test line interface and manual vehicle network testing, the technical solution of the present invention utilizes a preset test project to perform automated testing on the node to be tested of the actual vehicle according to the received test start instruction, and at the same time receives and checks the test results, and saves and displays the test return message that passes the check to the user. The embodiment of the present invention realizes automated testing of the node to be tested of the actual vehicle CAN network through a preset test project. The implementation process is simple, fast and low-cost, and the test results obtained by the test project are more accurate than those obtained manually, and there is almost no error.

[0054] Likewise, since the test project is preset and can be directly called, the test project can be reused. At the same time, the user can also make personalized adjustments to the test project as needed, so that the test project can be applied to various types of tests required by the user.

[0055] Step 102: Send the corresponding test message to the node to be tested of the actual vehicle according to the test project, receive and check the test return message of the node to be tested, and if the test return message passes the inspection, save the test return message and display it to the user.

[0056] In this embodiment, according to the test project, the corresponding test message is sent to the node to be tested of the actual vehicle and the test return message of the node to be tested is received. In this step, the sending of the test message is only associated with the reception of the test return message. There is no arbitrary association between the tests of any two different nodes to be tested. Several tests are independent and do not affect each other. At the same time, there is no sequential connection between the tests. Users can make corresponding adjustments as needed.

[0057] Specifically, such as Figure 2 As shown, Figure 2 A flow chart of an embodiment of a method for calling a corresponding test environment according to a test project provided by the present invention, and Figure 1 compared to, Figure 2 Step 202 is Figure 1 The specific implementation method of calling the corresponding test environment according to the test project in step 101 is to call the CANoe environment for testing the actual vehicle CAN network according to the test project, load the test project into the CANoe environment for running, and make the test project be tested in the CANoe environment.

[0058] In this embodiment, the test terminal calls the CANoe environment according to the test project, loads the test project into the CANoe environment for execution, and makes the entire test process in the CANoe environment, thereby meeting the test conditions required for testing the actual vehicle CAN network.

[0059] At the same time, most of the tests included in the test process in the embodiment of the present invention are performed by CANoe. By adjusting the test environment to the CANoe environment, a free combination of multiple tests can be achieved. Users can use CANoe to perform relevant tests as needed without making too many adjustments.

[0060] As another example of the embodiment of the present invention, see Figure 3 , Figure 3 Schematic diagram of a flow chart of an embodiment of a method for sending a test message to a corresponding node to be tested provided by the present invention. Figure 3 As shown, it includes step 301, step 301A and step 301B, wherein step 301A and step 301B are specific implementation methods of sending test messages of the test project to the corresponding node to be tested through CANoe and CANscope in step 301.

[0061] Step 301: Determine the node to be tested corresponding to the actual vehicle CAN network according to the tests included in the test project, edit the tests included in the test project into corresponding test messages and send them to the corresponding node to be tested via CANoe and CANscope.

[0062] In this embodiment, the nodes to be tested are determined through a preset test project, and the corresponding test messages are edited and sent to the corresponding nodes through CANoe and CANscope. The entire process is automatic and does not require manual operation by the test engineer, saving manpower and material resources while improving test efficiency.

[0063] In this embodiment, because the nodes under test are ECU nodes on the actual vehicle's CAN network, the present invention's technical solution directly tests the actual vehicle ECU nodes, resulting in more accurate test results that are closer to the actual values ​​generated by users operating the automotive product. With these test results, test engineers can make more precise adjustments to the product based on these results, ensuring that the final product better meets user needs and improves user experience and comfort.

[0064] Step 301A: The test project is loaded via CANoe, which sends the test message and receives the test return message via the network signal of the body controller on the actual vehicle.

[0065] Step 301B: using CANscope to collect the voltage waveform generated by the node to be tested during the actual vehicle CAN network test, and to measure and analyze the physical characteristics of the actual vehicle based on the voltage waveform.

[0066] In this embodiment, most tests of the real vehicle CAN network are implemented through CANoe and CANscope, which reduces the complexity of the test operation and enables the test operation to be automated.

[0067] As another example of the embodiment of the present invention, see Figure 4 , Figure 4 A structural diagram of an embodiment of the test content included in a test project provided by the present invention, such as Figure 4 As shown, the test content included in the test project 401 includes one or more of the following test combinations: physical layer test 401A, data link layer test 401B, interaction layer test 401C, application layer test 401D, fault tolerance 401E test, communication fault test 401F and diagnostic service test 401G of the actual vehicle CAN network.

[0068] In this embodiment, the technical solution of the present invention does not further limit the test items of the test project, and users can adjust them according to actual needs.

[0069] Among them, the physical layer test 401A of the real vehicle CAN network includes testing the real vehicle's explicit output voltage, real vehicle's implicit output voltage, real vehicle's rising edge time, real vehicle's falling edge time, real vehicle's bus resistance, and the vehicle's sleep and wake-up functions.

[0070] The real vehicle CAN network data link layer test 401B includes real vehicle message ID and DLC test, extended data frame sending test, remote frame sending test, real vehicle load rate test, and real vehicle high load test.

[0071] The actual vehicle CAN network interaction layer test 401C includes recording the sending time of all simulated message signals during the test and calculating the minimum, maximum and average values ​​of the sending intervals of several simulated message signals.

[0072] The actual vehicle CAN network application layer test 401D includes the communication status of the actual vehicle when the ignition switch is in the START position, the communication status of the actual vehicle when the ignition switch state is switched, the bus status of the actual vehicle after the vehicle is started, and whether there are error frames in the bus status in the OFF state and the ACC state.

[0073] The 401E fault tolerance test of the actual vehicle CAN network includes CAN_H short circuit test, CAN_L short circuit test, CAN_H short circuit to ground test, CAN_L short circuit to ground test, CAN_H short circuit to power supply test, CAN_L short circuit to power supply test, ECU power-off test, and verification of the efficiency of all nodes under test to restore normal communication after the fault is removed.

[0074] The actual vehicle CAN network communication fault test 401F includes checking whether there is an increase in communication-related faults in the vehicle before and after network sleep, wake-up, and power on and off.

[0075] The actual vehicle CAN network diagnostic service test 401G includes checking whether the relevant nodes to be tested in the entire vehicle can respond to diagnostic messages according to the requirements of the unified diagnostic service UDS.

[0076] In this embodiment, the test contents included in the test project include but are not limited to the above, and the user can make corresponding adjustments as needed.

[0077] In order to better illustrate the working principle and step flow of the testing method and system of the actual vehicle CAN network of the present invention, reference may be made to, but is not limited to, the relevant records above.

[0078] Accordingly, see Figure 5 , Figure 5 A structural diagram of an embodiment of a real vehicle CAN network testing system provided by the present invention is shown as follows: Figure 5The system shown includes a test terminal 501, a multimeter 502, and an OBD interface circuit 503;

[0079] The test terminal 501 is configured to respond to a test start command input by a user, retrieve a preset test project, retrieve a corresponding test environment according to the test project, and send a corresponding test message to a node to be tested 504 of a real vehicle according to the test project, receive and check a test return message from the node to be tested 504, and if the test return message passes the check, save the test return message and display it to the user; wherein the test environment is the CANoe environment required for testing the CAN network of a real vehicle;

[0080] The multimeter 502 is used to test the physical layer of the CAN network of the actual vehicle;

[0081] The OBD interface line 503 is used to connect the test terminal and the node to be tested of the real vehicle and to transmit test messages and test return messages.

[0082] Among them, the test terminal 501 calls the CANoe environment of the test vehicle CAN network according to the test project, loads the test project into the CANoe environment for operation, so that the test project is tested in the CANoe environment; wherein, the CANoe environment is integrated on the test terminal 501.

[0083] The test terminal 501 determines the node to be tested 504 corresponding to the actual vehicle CAN network based on the tests included in the test project, edits the tests included in the test project into corresponding test messages, and sends them to the corresponding node to be tested through CANoe501A, CANscope501B and OBD interface line 503; wherein, the node to be tested 504 is the ECU node to be tested in the actual vehicle CAN network.

[0084] The test terminal 501 is further used for:

[0085] The test project is loaded through CANoe501A, and the CANoe501A sends the test message and receives the test return message through the network signal of the body controller on the actual vehicle;

[0086] The voltage waveform generated by the node to be tested during the actual vehicle CAN network test is collected by CANscope501B, and the physical characteristics of the actual vehicle are measured and analyzed based on the voltage waveform.

[0087] In summary, the embodiment of the present invention provides a method and system for testing the CAN network of a real vehicle. By responding to a test start instruction input by the user, the system calls a preset test project, performs automated testing on the nodes to be tested of the real vehicle according to the received test start instruction, and simultaneously receives and checks the test results, and saves and displays the test return message that passes the inspection to the user. The technical solution of the present invention realizes automated testing of the nodes to be tested on the CAN network of a real vehicle through a preset test project. The implementation process is simple, fast, and low-cost, and the test results obtained by the test project are more accurate than those obtained manually, and almost no errors will occur.

[0088] The specific embodiments described above further illustrate the objectives, technical solutions, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of protection of the present invention for those skilled in the art.

Claims

1. A method for testing a real vehicle CAN network, characterized in that: The following steps are involved: In response to a test start instruction input by a user, calling a preset test project, and calling a corresponding test environment according to the test project; The test environment is the CANoe environment required for testing the actual vehicle CAN network; Determine the node to be tested corresponding to the actual vehicle CAN network according to the tests included in the test project, edit the tests included in the test project into corresponding test messages and send them to the corresponding node to be tested through CANoe and CANscope; wherein the node to be tested is the ECU node to be tested in the actual vehicle CAN network; This includes: using CANscope to collect the voltage waveform generated by the node to be tested during the actual vehicle CAN network test, and measuring and analyzing the physical characteristics of the actual vehicle based on the voltage waveform; receiving and checking the test return message of the node to be tested. If the test return message passes the inspection, the test return message is saved and displayed to the user.

2. A method for testing a real vehicle CAN network according to claim 1, characterized in that: The preset test project includes one or more of the following test combinations: Physical layer test, data link layer test, interaction layer test, application layer test, fault tolerance test, communication fault test and diagnostic service test of the real vehicle CAN network.

3. A method for testing a real vehicle CAN network according to claim 1, characterized in that: The method of calling the corresponding test environment according to the test project is as follows: The CANoe environment for testing the actual vehicle CAN network is retrieved according to the test project, and the test project is loaded into the CANoe environment for running, so that the test project is tested in the CANoe environment.

4. A method for testing a real vehicle CAN network according to claim 1, characterized in that: The test project sends test messages to the corresponding node to be tested through CANoe and CANscope, specifically: The test project is loaded through CANoe, and the CANoe realizes the sending of the test message and the receiving of the test return message through the network signal of the body controller on the actual vehicle.

5. A real vehicle CAN network testing system, characterized in that: The system includes a test terminal, a multimeter, and an OBD interface circuit; The test terminal is used to respond to a test start command input by a user, call a preset test project, call a corresponding test environment according to the test project, and send a corresponding test message to the node to be tested of the actual vehicle according to the test project, including: collecting the voltage waveform generated by the node to be tested during the actual vehicle CAN network test through CANscope, and measuring and analyzing the physical characteristics of the actual vehicle based on the voltage waveform; receiving and checking the test return message of the node to be tested, and if the test return message passes the check, saving the test return message and displaying it to the user; wherein the test environment is the CANoe environment required for testing the actual vehicle CAN network; The multimeter is used to test the physical layer of the CAN network of the actual vehicle; The OBD interface circuit is used to connect the test terminal and the node to be tested of the real vehicle and to transmit test messages and test return messages.

6. A real vehicle CAN network testing system as claimed in claim 5, characterized in that: The preset test project retrieved by the test terminal includes one or more of the following test combinations: Physical layer test, data link layer test, interaction layer test, application layer test, fault tolerance test, communication fault test and diagnostic service test of the real vehicle CAN network.

7. A real vehicle CAN network testing system as claimed in claim 5, characterized in that: The test terminal retrieves the corresponding test environment according to the test project, specifically: The test terminal retrieves the CANoe environment for testing the actual vehicle CAN network according to the test project, loads the test project into the CANoe environment for execution, and performs the test in the CANoe environment; The CANoe environment is integrated on the test terminal.

8. A real vehicle CAN network testing system as claimed in claim 5, characterized in that: The test terminal sends the corresponding test message to the node to be tested of the real vehicle according to the test project, specifically: The test terminal determines the node to be tested corresponding to the real vehicle CAN network according to the tests included in the test project, edits the tests included in the test project into corresponding test messages and sends them to the corresponding node to be tested via CANoe, CANscope and OBD interface lines; The node to be tested is an ECU node to be tested in the CAN network of a real vehicle.

9. A real vehicle CAN network testing system as claimed in claim 8, characterized in that: The test terminal is also used for: The test project is loaded through CANoe, and the CANoe realizes the sending of the test message and the receiving of the test return message through the network signal of the body controller on the actual vehicle.

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