HIL test system based on PEPS system and signal transmission method

Abstract

The invention discloses an HIL test system based on a PEPS system and a signal transmission method. The whole system is composed of an upper computer, an HIL rack, a key control system and the PEPS system. A control instruction of the key is sent out through the upper computer, a communication signal is sent out through the wireless communication board card of the HIL rack, the key control system comprises a wireless communication module which carries out signal interaction with the wireless communication board card in the HIL rack, and actions such as key pressing and moving of the key are achieved through the control signal sent by the HIL rack. By using the HIL automatic test system provided by the invention, the upper computer can wirelessly issue the control instruction to the key control system through the wireless communication board card of the HIL rack so as to control the key action. After the key can be controlled by the upper computer, related function items can be tested through automatic testing software of the upper computer, so that the testing efficiency and the testing standardization are effectively improved, and errors of personnel during manual testing are reduced.

Description

Technical Field

[0001] This application relates to the technical field of vehicle testing, and particularly to a HIL test system and a signal transmission method based on a PEPS system. Background Art

[0002] With the continuous progress of commercial vehicle manufacturing technology and the continuous subdivision development of the commercial vehicle market, each vehicle enterprise has applied PEPS (Passive Entry Passive Start, keyless entry and start system) on vehicles. PEPS consists of a controller, a radio frequency transmitter in the intelligent key, a receiver at the vehicle end, an LF drive antenna, a start switch, etc. When the key is within the effective range, the vehicle owner pulls the car door or presses the one-key start switch, and the corresponding module will send a terminal signal to wake up the main controller to start the entire communication process. The entire process can open the car door or start the engine without using the key. This system is generally integrated in the corresponding domain controller, and the functions of the corresponding key buttons are also integrated in the same controller.

[0003] For the PEPS system, the realization of the functions of this system requires both the controller integrating this system and the key. Since the system needs to judge whether the key is within the effective range, there is a functional requirement for moving the key position. At the same time, as a tester, it is also necessary to test the functions of the relevant key buttons. When testing the above functions currently, only the method of manual button pressing and moving can be used to verify the functions of the PEPS system, with low test efficiency and poor test standardization. With the continuous improvement of the controller functions, the functions to be tested are gradually becoming more complex, and the time required to test all functions is also increasing continuously. Summary of the Invention

[0004] This application provides a HIL test system and a signal transmission method based on a PEPS system to solve the above problems.

[0005] On the one hand, this application provides a HIL test system based on a PEPS system. The system includes: a HIL bench communicatively connected to a host computer, a PEPS controller communicatively connected to the HIL bench, and a key control system communicatively connected to the PEPS controller, wherein the key control system is communicatively connected to the HIL bench, and a communication bus, a switch signal, and a wireless communication board are integrated on the HIL bench.

[0006] In an implementation manner of this application, in the control panel of the host computer, there are provided a control panel for the key switch and a control panel for key movement. During the test process, the corresponding control instructions are selected through the control panel of the host computer.

[0007] In an implementation manner of the present application, the HIL bench is used to convert the control instructions sent by the host computer into wireless communication signals through a wireless communication board card, so as to achieve wireless transmission with the key control system; the HIL bench is hard-wired to the PEPS controller through a CAN line, and is used to complete the interaction of CAN signals, switch signals and the acquisition of controller output signals between the two.

[0008] In an implementation manner of the present application, the key control system includes a single-chip microcomputer control system, a power supply module, a mobile module, a wireless communication module and a key module.

[0009] In an implementation manner of the present application, the single-chip microcomputer control system decouples the wireless communication signal into control signals for the mobile module and the key module according to a specific operation method for the control signals transmitted by the wireless communication module, and issues the control signals.

[0010] In an implementation manner of the present application, the mobile module and the key module are actuators of the key control system, and are used to complete the decoupling instructions of the single-chip microcomputer control system.

[0011] In an implementation manner of the present application, the mechanical button of the original key is removed from the key module, and the original button switch is connected to the single-chip microcomputer control system, and the output of the single-chip microcomputer control system is used to control the suction of the relay as its switch.

[0012] In an implementation manner of the present application, the key is designed according to the internal circuit of the original key and the communication protocol between the PEPS system and the key, and is integrated into the single-chip microcomputer control system.

[0013] In an implementation manner of the present application, the host computer completes remote communication with the key control system according to the corresponding communication protocol, so as to achieve that the issued control instructions do not pass through the HIL cabinet.

[0014] The present application also provides a HIL test signal transmission method based on a PEPS system. The method includes: the control panel of the host computer issues a control instruction for closing a key. The control instruction is transmitted to the wireless communication board card in the HIL cabinet. The board card converts the control instruction into a wireless communication signal and sends it out. The wireless communication module in the key control system receives the wireless communication signal and transmits the signal to the single-chip microcomputer control system. The single-chip microcomputer control system decouples the wireless communication signal into a switch control signal and transmits it to the key module to trigger its key closing operation. The key module closes the key and emits an electromagnetic wave signal. The PEPS system receives the electromagnetic wave signal and completes the corresponding functions. At the same time, the HIL bench monitors the PEPS system and transmits the monitored CAN information and hard-wired information back to the host computer for logical judgment. After completing the signal transmission closed-loop, the automated test software's test script is used to complete the automated test of the PEPS system's functions.

[0015] A HIL test system and signal transmission method based on a PEPS system provided by the present application have the following beneficial effects: The host computer sends a key control instruction, and the instruction is transmitted to the key control system through the wireless communication board card. The key control system can receive the wireless communication signal and complete the relevant instructions to meet the test requirements of the PEPS system. After the host computer can control the key, the automated test software of the host computer can be used to design automated test cases and scripts to realize the automated test of the PEPS system functions. The test items of manual testing are reduced, and the work efficiency and test standardization are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0017] Figure 1 It is a flowchart of a HIL test method based on a PEPS system provided by an embodiment of the present application;

[0018] Figure 2 It is an internal structure diagram of the key control system provided by an embodiment of the present application;

[0019] Figure 3 It is a signal transmission flowchart provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To make the objectives, technical solutions and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments of this application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts shall fall within the scope of protection of this application.

[0021] The embodiments of this application provide a HIL test system and a signal transmission method based on a PEPS system. The technical solutions proposed in the embodiments of this application will be described in detail below with reference to the drawings.

[0022] This application provides a HIL test system based on a PEPS system, as Figure 1 shown, the system includes: a HIL bench communicatively connected to a host computer, a PEPS controller communicatively connected to the HIL bench, and a key control system communicatively connected to the PEPS controller, wherein the key control system is communicatively connected to the HIL bench, and the HIL bench integrates a communication bus, switch signals and a wireless communication board.

[0023] There is a host computer control system on the host computer for different actions of the key. When testing different requirements, the key needs to complete different actions. In the system proposed by the present invention, in cooperation with the key control system, on the control panel of the host computer, there is a control panel for the switch of the key and a control panel for the movement of the key. During the test, the corresponding control instructions are selected through the control panel of the host computer.

[0024] The HIL bench is responsible for converting the control instructions sent by the host computer into wireless communication signals through the wireless communication board to achieve wireless transmission with the key control system; among them, the HIL bench is connected to the CAN line and hard wire of the domain controller where the PEPS is located to complete the interaction of CAN signals and switch signals between the two and the acquisition of the controller output signals. After collecting the signals, the collected signals are sent back to the host computer for analysis to determine whether the function is realized.

[0025] The PEPS controller is a domain controller integrating the PEPS system. To test the functions of the PEPS system, this controller needs to be connected to the vehicle HIL test system. The functional linkage between this controller and the key can be fed back to the host computer through the CAN bus and hard wire of the HIL cabinet for function judgment.

[0026] The key control system is the core part of the present invention. As a bridge between the HIL bench and the PEPS system, it completes functions such as receiving wireless communication signals, moving the key, and triggering the key button. The schematic diagram of the internal structure of the key control system is as Figure 2As shown in the figure. The entire system consists of five parts: a single-chip microcomputer control system, a power module, a mobile module, a wireless communication module, and a key module.

[0027] The power module is the internal power supply of the entire system. After the level conversion of the power module, it supplies power to the entire control system; the wireless communication module and the wireless communication board of the HIL bench follow the same communication protocol, receive the wireless communication signal of the HIL cabinet, and transmit the signal to the single-chip microcomputer control system for processing; the single-chip microcomputer control system is responsible for decoupling the control signal transmitted by the wireless communication module into the control signals of the mobile module and the key module according to a specific operation method, and sending down the control signals; the mobile module and the key module are the execution mechanisms of the key control system, and complete the decoupling instructions of the single-chip microcomputer control system.

[0028] Among them, the key module is the unit of final control. It mainly removes the mechanical button of the original key and connects the original button switch to the single-chip microcomputer control system, and controls the relay to be energized through the output of the single-chip microcomputer control system as its switch. Due to the need for key positioning in the PEPS system, the PEPS system sends low-frequency signals and receives high-frequency signals, and the key sends high-frequency signals and receives low-frequency signals. Through this signal interaction method, the position of the key is determined to realize the opening and closing of the vehicle door and the keyless start of the vehicle. Therefore, the mobile module is responsible for changing the position of the key to verify related functions.

[0029] In the embodiment of the present application, the switch of the original key is disassembled and integrated into the key module, and the actual button of the key is replaced by a relay controlled by the output of the single-chip microcomputer control system. In addition, the key can be redesigned according to the internal circuit of the original key and the communication protocol between the PEPS system and the key and integrated into the single-chip microcomputer control system to maintain the integrity of the original key.

[0030] In addition, in the present application, the host computer issues control instructions to the wireless communication board of the HIL cabinet, and the wireless communication board and the key control system complete remote communication. In addition, the host computer can directly complete remote communication with the key control system according to the corresponding communication protocol, and realize that the control instructions are issued without passing through the HIL cabinet. There is only one key module in the present application, and it receives wireless communication signals through the wireless communication module, and changes the position of the key through the mobile module. In addition, multiple identical key modules can be designed according to Alternative One and placed in different positions to simulate different positions where the key is located. At the same time, the single-chip microcomputer control module can be integrated into the HIL cabinet and completely receive the control instructions of the host computer and issue control instructions through hard-wired connections.

[0031] The above is a HIL test system based on the PEPS system provided by an embodiment of the present application. The present application also provides a HIL test signal transmission method based on the PEPS system, and the process is as follows Figure 3 As shown, the method includes: the control panel of the host computer issues a control instruction for key closure, and the control instruction is transmitted to the wireless communication board card in the HIL cabinet. The board card converts the control instruction into a wireless communication signal and sends it out. The wireless communication module in the key control system receives the wireless communication signal and transmits the signal to the single-chip microcomputer control system. The single-chip microcomputer control system decouples the wireless communication signal into a switch control signal and transmits it to the key module to trigger its key closure operation. The key module closes the key and emits an electromagnetic wave signal. The PEPS system receives the electromagnetic wave signal and completes the corresponding function. At the same time, the HIL bench monitors the PEPS system and transmits the monitored CAN information and hard wire information back to the host computer for logical judgment; after completing the signal transmission loop, the automation test software's test script completes the automation test of the PEPS system's function.

[0032] A HIL test system and signal transmission method based on the PEPS system provided by the present application have the following beneficial effects: the host computer sends a key control instruction, and the instruction is transmitted to the key control system through the wireless communication board card. The key control system can receive the wireless communication signal and complete the relevant instructions to meet the test requirements of the PEPS system. After the host computer can control the key, the automation test software of the host computer can be used to design automation test cases and scripts to realize the automation test of the PEPS system's function. The test items of manual testing are reduced, and the work efficiency and test standardization are improved.

[0033] Each embodiment in the present application is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the differences between each embodiment and other embodiments are emphasized. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment.

[0034] It should also be noted that the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, commodity or device. Without further limitation, the element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, commodity or device including the element.

[0035] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A HIL test system based on a PEPS system, characterized in that: The system includes: a HIL test bench connected to a host computer for communication, a PEPS controller connected to the HIL test bench for communication, and a key control system connected to the PEPS controller for communication, wherein the key control system is connected to the HIL test bench for communication, and the HIL test bench integrates a communication bus, a switch signal, and a wireless communication board.

2. A HIL test system based on a PEPS system according to claim 1, characterized in that: The control panel of the host computer is provided with a control panel for key switching and a control panel for key movement. During the test, the corresponding control instruction is selected through the control panel of the host computer.

3. A HIL test system based on a PEPS system according to claim 1, characterized in that: The HIL bench is used to convert the control instructions issued by the host computer into wireless communication signals through the wireless communication board to achieve wireless transmission with the key control system; the HIL bench and the PEPS controller are hard-wired via a CAN line to complete the interaction of CAN signals and switch signals between the two and the collection of controller output signals.

4. A HIL test system based on a PEPS system according to claim 1, characterized in that: The key control system includes a single chip microcomputer control system, a power module, a mobile module, a wireless communication module and a key module.

5. A HIL test system based on a PEPS system according to claim 4, characterized in that: The single-chip control system decouples the control signal transmitted from the wireless communication module into control signals of the mobile module and the key module according to a specific operation method, and sends the control signal.

6. A HIL test system based on a PEPS system according to claim 4, characterized in that: The moving module and the key module are the actuators of the key control system, and are used to complete the decoupling instructions of the single-chip microcomputer control system.

7. The HIL test system based on the PEPS system according to claim 4, characterized in that: The key module is made by removing the mechanical key of the original key and connecting the original key switch to the single-chip control system, and controlling the switch by the output control relay of the single-chip control system.

8. The HIL test system based on the PEPS system according to claim 7, characterized in that: The key is designed according to the original key internal circuit and the communication protocol between the PEPS system and the key, and is integrated into the single-chip microcomputer control system.

9. The HIL test system based on the PEPS system according to claim 3, characterized in that: The host computer completes remote communication with the key control system according to the corresponding communication protocol, so that control instructions can be sent without passing through the HIL cabinet.

10. A HIL test signal transmission method based on a PEPS system, characterized in that: The method comprises: a control panel of a host computer issues a control instruction for key closing, the control instruction is transmitted to a wireless communication board of a HIL cabinet, the board converts the control instruction into a wireless communication signal and sends it out, a wireless communication module in a key control system receives the wireless communication signal and transmits the signal to a single-chip control system, the single-chip control system decouples the wireless communication signal into a switch control signal and transmits the signal to a key module to trigger its key closing operation, the key module closes the key and sends out an electromagnetic wave signal, the PEPS system receives the electromagnetic wave signal and completes a corresponding function, the HIL bench monitors the PEPS system, and transmits the monitored CAN information and hard-wired information back to the host computer for logic judgment; after completing the signal transmission closed loop, the automated test of the function of the PEPS system is completed through the test script of the automated test software.

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