Steer-by-wire performance test system and application method thereof

Abstract

The invention discloses a steer-by-wire performance test system and an application method thereof, and belongs to the field of steer-by-wire performance test. The system comprises a serial port screen, a controller, a CAN communication module and a to-be-tested steer-by-wire device, the serial port screen is used for controlling a test process through a human-computer interaction interface and supporting serial port communication with the controller to send a test command; the controller is used for sending a corresponding message according to a test command of the serial port screen to control the to-be-tested steer-by-wire equipment to perform a corresponding test; and the CAN communication module is connected between the controller and the to-be-tested steer-by-wire equipment and is used for realizing CAN communication between the controller and the to-be-tested steer-by-wire equipment. According to the invention, the complete drive-by-wire performance test is realized, tools required for the drive-by-wire performance test are reduced, the test efficiency is improved, and subsequent test steps are reduced.

Description

Technical Field

[0001] The invention belongs to the field of wire-controlled steering device testing, and in particular, relates to a wire-controlled steering performance testing system and an application method thereof. Background Art

[0002] Steer-by-wire equipment is a modern automotive steering system that uses electronic control technology to replace traditional mechanical connections. It is widely used in vehicles, ships, aerospace and other technical fields to improve energy efficiency and driving experience.

[0003] The comparative document (CN118464413A) discloses a corner module steering mechanism test bench and test method, which solves the technical problem that the existing test benches perform less performance tests on the "corner module". The corner module steering mechanism test bench includes a bench body, a movable turntable, a test device and a controller; the movable turntable is rotatably arranged on the bench body for supporting the wheel; the test device includes a motor and a transmission assembly, and the output end of the transmission assembly is fixedly connected to the movable turntable; the controller is electrically connected to the motor, and is used to control the motor to output a preset torque or obtain the power generation power and speed of the motor. The test bench of the present application can perform a variety of tests on the corner module, test the steering torque and steering angular velocity of the corner module, connect the corner module steering mechanism test bench with the wire control steering, and apply torque to the wheel of the corner module through the corner module steering mechanism test bench to simulate the force along the steering kingpin circumference on the wheel on different road surfaces, and carry out wire control steering simulation development.

[0004] Although the above-mentioned comparative documents have achieved the performance test of the wire-controlled steering product, their focus is on the improvement of the test end operation structure, and they do not involve the planning of the test process from product selection, standard detection, no-load, load, etc., and they are extremely dependent on the control of the host computer or computer and are limited by the host computer or computer, resulting in high difficulty in operation, inconvenient movement, and inconvenient testing. At the same time, the existing wire-controlled steering performance test of different products requires familiarity with the different CAN communication messages corresponding to a variety of products, and requires the use of a computer for operation, which is not convenient for ordinary workers to test product performance. Summary of the invention

[0005] The present invention aims to overcome the shortcomings of the prior art and proposes a wire-controlled steering performance testing system and an application method thereof, so as to achieve the following purposes: to realize a comprehensive performance test of a wire-controlled steering device corresponding to a product model after the product model is selected, and to receive various data fed back during the product testing process for display, so that the results of the performance test are clear at a glance, and at the same time, the integrated system makes the operation process simpler to reduce the tools required for performance testing, improve test efficiency, and reduce subsequent steps.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A steering-by-wire performance test system, the system comprising a serial port screen, a controller, a CAN communication module, and a steering-by-wire device to be tested, wherein the serial port screen is used to control the test process through a human-computer interaction interface, and supports serial port communication with the controller to send test commands; the controller is used to send corresponding messages according to the test commands of the serial port screen to control the steering-by-wire device to be tested to perform corresponding tests; the CAN communication module is connected between the controller and the steering-by-wire device to be tested, and is used to realize CAN communication between the controller and the steering-by-wire device to be tested.

[0008] Preferably, the CAN communication module includes a CAN conversion chip, and the CAN conversion chip is connected between the controller and the steer-by-wire device to be tested, and is used to realize CAN communication between different systems.

[0009] Preferably, the controller is a single chip microcomputer.

[0010] Preferably, the steer-by-wire device to be tested includes a steer-by-wire electric power steering system.

[0011] Preferably, the human-computer interaction interface of the serial port screen includes selection buttons for multiple models of wire-controlled steering devices to be tested.

[0012] Preferably, after the model selection is completed, the human-machine interaction interface of the serial port screen also includes control buttons for powering on, powering off, starting the test, returning to the correct position, and clearing faults of the wire-controlled steering device to be tested.

[0013] Preferably, the human-computer interaction interface of the serial port screen also includes a current status display interface and a test feedback display interface of the wire-controlled steering device to be tested, the status including ignition status, marking status, and fault clearing status; the test feedback includes the maximum speed, minimum angle, and maximum angle of the wire-controlled steering device to be tested.

[0014] Preferably, after clicking the start test button, the human-computer interaction interface of the serial port screen also includes confirmation interfaces for no-load test and load test.

[0015] At the same time, based on the above-mentioned steering-by-wire performance test system, the present invention also proposes an application method thereof, which comprises the following steps:

[0016] S1. After the test system is powered on, the serial port screen is turned on. If the serial port screen is not turned on, the test is terminated;

[0017] S2. Select the model of the wire-controlled steering device to be tested through the serial port screen, and click the power-on and clear fault buttons in sequence. Correspondingly, the controller sends a message to control the wire-controlled steering device to be tested to power on and clear fault codes;

[0018] S3, click the start test button on the serial port screen, and correspondingly, the controller sends a message to control the wire-controlled steering device to be tested to perform a hit, and ends the test if the hit fails;

[0019] S4. After the bid is successful, a no-load test is first performed and confirmed through the serial port screen. Correspondingly, the controller sends a message to control the wire-controlled steering device to be tested to perform a no-load test, and the result of the no-load test is fed back to the serial port screen for display;

[0020] S5. After the no-load test, click the return and power-off buttons on the serial port screen in sequence, and correspondingly, the controller sends a message to control the tested wire-controlled steering device to perform return and power-off operations;

[0021] S6. Install the steer-by-wire device to be tested on the test bench to install the load. After confirming that the installation is complete, click the power-on and start test buttons on the serial port screen and confirm to perform the load test. Correspondingly, the controller sends a message to control the steer-by-wire device to be tested to perform the load test, and the result of the load test is fed back to the serial port screen for display;

[0022] S7. After the load test, click the return to center, clear fault and power-off buttons on the serial port screen in sequence. Correspondingly, the controller sends a message to control the tested wire-controlled steering device to return to center, and performs a power-off operation after clearing the fault code; after powering off, remove the tested wire-controlled steering device from the test bench to end the test.

[0023] The technical effects of the present invention are:

[0024] 1. The system structure of the present invention is simple, supports multiple communication protocols, and is applicable to various types of wire control products;

[0025] 2. The design of the human-machine interaction interface makes the operation of the present invention simple and easy for workers to operate;

[0026] 3. The test operation of the present invention is realized by a highly integrated controller, with high test accuracy and efficiency. At the same time, the test results are fed back to the serial port screen for display, and the performance test results are intuitive and clear at a glance.

[0027] 4. The present invention takes into account various situations in the performance test of wire-controlled steering, including on-target detection, no-load test, load test, etc., making the test more comprehensive and improving the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A structural diagram of a steer-by-wire performance test system according to an embodiment of the present invention;

[0029] Figure 2This is a schematic diagram of the product selection interface of the serial port screen according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the test interface of the serial port screen according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the no-load test interface of the serial port screen according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of a load test interface of a serial port screen according to an embodiment of the present invention;

[0033] Figure 6 A flow chart of a method for testing the steering-by-wire performance of a serial port screen according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following is a further detailed description of the specific implementation of the present invention through the description of the embodiments with reference to the accompanying drawings, with the purpose of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention and to facilitate its implementation. In order to make the technical solution of the present invention clearer, the present invention is explained through the following embodiments:

[0035] A steer-by-wire performance test system, such as Figure 1 As shown, the system includes a serial port screen, a controller, a CAN communication module, and a wire-controlled steering device to be tested, wherein the serial port screen is used to control the test process through a human-computer interaction interface, and supports serial port communication with the controller to send test commands; the controller is used to send corresponding messages according to the test commands of the serial port screen to control the wire-controlled steering device to be tested to perform corresponding tests; the CAN communication module is connected between the controller and the wire-controlled steering device to be tested, and is used to realize CAN communication between the controller and the wire-controlled steering device to be tested.

[0036] Specifically, due to the different communication protocols adopted between different devices or systems, including all adopting CAN communication but with different transmission rates or baud rates, in this context, the CAN conversion chip can unify different communication protocols, thereby realizing stable and reliable communication between different devices or systems. In this embodiment, the CAN communication module adopted includes a CAN conversion chip, which is connected between the controller and the wire-controlled steering device to be tested, and is used to realize CAN communication between different systems, so that there is no need to analyze multiple messages, and there is no need for multiple wiring harnesses, the operation is simple, and the cost is reduced. In addition, the controller of this embodiment is a single-chip microcomputer (MCU), and is also equipped with a corresponding reset circuit and a crystal oscillator circuit. The single-chip microcomputer has the advantages of high integration and small size, which can improve the control efficiency of the test system of the present invention and improve the test efficiency; the wire-controlled steering device to be tested includes a wire-controlled electric power steering system (EPS). EPS is the most commonly used wire-controlled steering device in the prior art, has a variety of models, is widely used in vehicles, and the performance test on it is representative.

[0037] The system structure of the present invention is simple, which reduces the tools required for performance testing and improves testing efficiency. In order to facilitate operation and repeated use, the present invention can integrate the above system into a control box as a movable portable testing tool to test wire-controlled steering products in various scenarios. At the same time, in order to ensure the versatility of the tool, the present embodiment also adds a DCDC converter, which is connected to the controller and the serial port screen to convert the external voltage (VIN: input voltage) into the working voltage required by the controller and the serial port screen, thereby ensuring the normal use of the test tool.

[0038] In order to meet the test requirements of the steering performance of the wire control, the present invention also sets a human-machine interaction interface of the serial port screen, which includes a selection button for multiple types of wire control steering devices to be tested, such as Figure 2 As shown, the models of the wire-controlled steering devices to be tested in this embodiment include W004U, P007J, WO17, etc. After clicking the corresponding model selection button, the serial port screen can jump to the test interface under the corresponding model. This embodiment takes W004U as an example, which will not be repeated later.

[0039] like Figure 3As shown in the figure, in the test interface under the W004U model, the human-machine interaction interface of the serial port screen also includes control buttons for powering on, powering off, starting the test, returning to the center, and clearing faults of the wire-controlled steering device to be tested. Among them, returning to the center means returning the steering wheel of the EPS system to the center; clearing faults means clearing the fault code of the EPS system; when the start test operation is triggered, it is necessary to first perform a centering test on the wire-controlled steering device to be tested, that is, to determine whether the installation angle of the EPS input shaft corresponds to the EPS steering angle of 0 degrees. If they do not correspond, it means that the device is unqualified and has safety hazards. After clicking the corresponding button, the serial port screen will package the corresponding operation instructions and send them to the controller, and the controller will then send a message to the wire-controlled steering device to be tested to drive it to perform the corresponding operation.

[0040] At the same time, in order to monitor the results of the operation execution in real time, the human-computer interaction interface of the serial port screen of the present invention also includes a current status display interface of the wire control steering device to be tested, such as Figure 3 As shown, the status in this embodiment includes ignition status, hit status, fault clearing status, etc. Among them, when the wire-controlled steering device to be tested is powered on, the ignition status is displayed in green, and when it is powered off, the ignition status is displayed in red; when the wire-controlled steering device to be tested is successfully hit, the hit status is displayed in green, and when it fails to hit, the hit status is displayed in red; when the fault of the wire-controlled steering device to be tested is cleared, the fault clearing status is displayed in green, and when the fault clearing is not completed, the fault clearing status is displayed in red.

[0041] In specific implementation, other state representation methods may also be selected to reflect the difference between different states, and the present invention is not limited thereto.

[0042] After clicking the start test button, the human-computer interaction interface of the serial port screen also includes a confirmation interface for no-load test and load test, such as Figure 4 and 5 As shown. The present invention takes into account various situations when testing the performance of wire-controlled steering, such as no-load test, load test, etc., so that the test is more comprehensive and the accuracy of the test results is improved. In this embodiment, after clicking the start test button, the confirmation interfaces of the no-load test and the load test should pop up one after another, that is, the no-load test is performed first and then the load test, and the load test is performed after the no-load test is completed, so as to simplify the test process and speed up the test efficiency. At the same time, in order to feedback the test results in real time and determine whether the product performance is qualified by monitoring various data, the human-computer interaction interface of the serial port screen of the present invention should also include a test feedback display interface for the tested wire-controlled steering device, such as Figure 3 , 4 As shown in any one of , 5, the test feedback of this embodiment includes the maximum speed (angular velocity), minimum angle, maximum angle, etc. of the wire-controlled steering device to be tested. During specific implementation, the content to be displayed can be flexibly selected according to actual needs.

[0043] At the same time, based on the above-mentioned wire control steering performance test system, the present invention proposes a corresponding application method, such as Figure 6 As shown, the method comprises the following steps:

[0044] S1. After the test system is powered on, the serial port screen is lit up. If the serial port screen is not lit up, the test is terminated.

[0045] S2. Select the model of the wire-controlled steering device to be tested through the serial port screen, and click the power-on and clear fault buttons in sequence. Correspondingly, the controller sends a message to control the wire-controlled steering device to be tested to power on and clear fault codes.

[0046] S3, click the start test button on the serial port screen, and correspondingly, the controller sends a message to control the wire-controlled steering device to be tested to perform a hit, and ends the test if the hit fails;

[0047] S4. After the bid is successful, the serial port screen first pops up a no-load test confirmation interface. After the operator confirms, the controller sends a message to control the wire-controlled steering device to be tested to perform a no-load test. The result of the no-load test is fed back to the serial port screen for display.

[0048] S5. After the no-load test, click the return and power-off buttons on the serial port screen in turn, and the controller sends a message to control the tested wire-controlled steering device to return and power off. Since the load test requires additional installation of loads, it is necessary to power off in advance to ensure personnel safety.

[0049] S6. Install the wire-controlled steering device to be tested on the test bench to install the load. After confirming that the installation is complete, click the power-on and start test buttons on the serial port screen, and the serial port screen pops up a load test confirmation interface. After the operator confirms, the controller sends a message to control the wire-controlled steering device to be tested to perform a load test, and the result of the load test is fed back to the serial port screen for display.

[0050] S7. After the load test, click the return to center, clear fault and power-off buttons on the serial port screen in sequence. Correspondingly, the controller sends a message to control the tested wire-controlled steering device to return to center, and performs a power-off operation after clearing the fault code; after powering off, remove the tested wire-controlled steering device from the test bench to end the test.

[0051] In summary, the system and method of the present application have the following advantages:

[0052] 1. Applicable to various types of wire control products

[0053] 2. Simple operation, easy for workers to operate;

[0054] 3. High accuracy, high efficiency, and intuitive performance test results that are clear at a glance.

[0055] The present invention is described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention; or the above concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A steering-by-wire performance test system, characterized in that: The system includes a serial port screen, a controller, a CAN communication module, and a wire-controlled steering device to be tested, wherein the serial port screen is used to control the test process through a human-computer interaction interface, and supports serial port communication with the controller to send test commands; the controller is used to send corresponding messages according to the test commands of the serial port screen to control the wire-controlled steering device to be tested to perform corresponding tests; the CAN communication module is connected between the controller and the wire-controlled steering device to be tested, and is used to realize CAN communication between the controller and the wire-controlled steering device to be tested.

2. A steer-by-wire performance test system according to claim 1, characterized in that: The CAN communication module includes a CAN conversion chip, which is connected between the controller and the steer-by-wire device to be tested and is used to realize CAN communication between different systems.

3. A steer-by-wire performance testing system according to claim 1, characterized in that: The controller is a single chip microcomputer.

4. A steer-by-wire performance testing system according to claim 1, characterized in that: The steer-by-wire device to be tested includes a steer-by-wire electric power steering system.

5. The steer-by-wire performance testing system according to claim 1, characterized in that: The human-computer interaction interface of the serial port screen includes buttons for selecting a plurality of models of the wire-controlled steering devices to be tested.

6. A steer-by-wire performance test system according to claim 5, characterized in that: After the model selection is completed, the human-machine interaction interface of the serial port screen also includes control buttons for powering on, powering off, starting the test, returning to the center, and clearing faults of the wire-controlled steering device to be tested.

7. A steer-by-wire performance testing system according to claim 6, characterized in that: The human-computer interaction interface of the serial port screen also includes a current status display interface and a test feedback display interface of the wire-controlled steering device to be tested, wherein the status includes ignition status, on-target status, and fault clearing status; the test feedback includes the maximum speed, minimum angle, and maximum angle of the wire-controlled steering device to be tested.

8. A steer-by-wire performance test system according to claim 6 or 7, characterized in that: After clicking the start test button, the human-computer interaction interface of the serial port screen also includes confirmation interfaces for no-load test and load test.

9. An application method of a steer-by-wire performance test system, characterized in that: The method is applied to a steer-by-wire performance test system according to any one of claims 1 to 8, and the method comprises the following steps: S1. After the test system is powered on, the serial port screen is turned on. If the serial port screen is not turned on, the test is terminated; S2. Select the model of the wire-controlled steering device to be tested through the serial port screen, and click the power-on and clear fault buttons in sequence. Correspondingly, the controller sends a message to control the wire-controlled steering device to be tested to power on and clear fault codes; S3, click the start test button on the serial port screen, and correspondingly, the controller sends a message to control the wire-controlled steering device to be tested to perform a hit, and ends the test if the hit fails; S4. After the bid is successful, a no-load test is first performed and confirmed through the serial port screen. Correspondingly, the controller sends a message to control the wire-controlled steering device to be tested to perform a no-load test, and the result of the no-load test is fed back to the serial port screen for display; S5. After the no-load test, click the return and power-off buttons on the serial port screen in sequence, and correspondingly, the controller sends a message to control the wire-controlled steering device to be tested to perform return and power-off operations; S6. Install the steer-by-wire device to be tested on the test bench to install the load. After confirming that the installation is complete, click the power-on and start test buttons on the serial port screen and confirm to perform the load test. Correspondingly, the controller sends a message to control the steer-by-wire device to be tested to perform the load test, and the result of the load test is fed back to the serial port screen for display; S7. After the load test, click the return to center, clear fault and power-off buttons on the serial port screen in sequence. Correspondingly, the controller sends a message to control the tested wire-controlled steering device to return to center, and performs a power-off operation after clearing the fault code; after powering off, remove the tested wire-controlled steering device from the test bench to end the test.

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