A SBW assembly durability testing device based on LabVIEW

Abstract

The present invention discloses a LabVIEW-based SBW assembly durability testing device, including an electrical cabinet, a workbench fixed to the upper end surface of the electrical cabinet, a plurality of guide rods fixed to the upper end surface of the workbench, a lifting platform sleeved between the surfaces of the plurality of guide rods, a lifting seat installed between the electrical cabinet and the lower end surface of the lifting platform, a plurality of support plates fixed to the upper end surface of the lifting platform, a sleeve fixed to one side of the support plate, and a bracket fixed to the extended end surface of the sleeve. In the present invention, the device can simultaneously perform durability tests of three SBWs, and continuously and stably run up to 30,000 test cycles. In order to ensure the stability of the test, the position origin of the servo motor is locked from the start of software operation, and the angle of rotation of the servo motor is recorded during the entire shifting process to ensure that the angle deviation of each servo motor rotation is stable. In order to ensure the long-term operation of the software, an independent thread is added, which can release computer memory once every hour.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile gear position detection equipment, and in particular to a SBW assembly durability detection equipment based on LabVIEW. Background Art

[0002] The automobile shift mechanism is an operating mechanism for changing the speed of the automobile. The quality of the automobile shift mechanism is also related to the safety performance of driving. That is to say, if one end of the gear lever is damaged during the driving shifting process, it is directly related to safety and the consequences may be very serious. Therefore, it is very necessary to test the durability of the automobile shift mechanism. SBW is a system that realizes shifting through electronic control. The system cancels the cable between the traditional shift mechanism and the gearbox, and transmits the shift signal to the electronic control unit through the sensor in the shift mechanism. After processing the signal, the electronic control unit sends the shift command to the shift motor, thereby realizing the switching of forward gear, reverse gear, neutral gear, parking gear and other gears. In the prior art, a manual detection device is used for the durability detection of the automobile shift mechanism. LabVIEW is a program development environment. The durability of the SBW assembly can be automatically detected through a preset program.

[0003] The automobile gear shift high and low temperature durability testing device shown in the publication number CN112444380A includes a testing body, an automobile gear shift high and low temperature durability test cabinet, a testing mechanism, a support frame, a reversing mechanism and a transmission mechanism. A testing room is provided on the left side of the front end of the testing body, a storage room is provided on the right side of the testing body, the support frame is provided with two supporting plates distributed up and down, the reversing mechanism and the transmission mechanism are distributed up and down and are respectively fixed on the two supporting plates, and the testing mechanism is installed in the testing room;

[0004] In the above device, although pneumatic means are used and the temperature of the actual driving environment is simulated to facilitate the simulation of the practical driving environment of the car gear lever at different temperatures, during the detection process, only a single assembly can be detected, which makes the detection efficiency slow and the detection is not stable. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a LabVIEW-based SBW assembly durability testing device to solve the above problems and the problems raised by the background technology.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a LabVIEW-based SBW assembly durability testing device, comprising an electrical cabinet, a workbench is fixed on the upper end surface of the electrical cabinet, a plurality of guide rods are fixed on the upper end surface of the workbench, a lifting platform is sleeved between the surfaces of the plurality of guide rods, a lifting seat is installed between the electrical cabinet and the lower end surface of the lifting platform, a plurality of support plates are fixed on the upper end surface of the lifting platform, a sleeve is fixed on one side of the support plate, a bracket is fixed on the extended end surface of the sleeve, an SBW bracket is assembled in the inner cavity of the bracket, an SBW assembly is installed on the upper end surface of the SBW bracket, and an SCU control module is installed on the lower end surface of the SBW bracket;

[0009] A plurality of motors 1 are installed on one side of the upper end surface of the lifting platform, and a transmission shaft is installed on the output end of the plurality of motors 1, a mounting plate 1 is fixed on the extended end of the transmission shaft, a lever 1 is fixed on one side of the surface of the mounting plate 1, and a lever 2 is fixed on the other side of the surface of the mounting plate 1, a mounting plate 2 is installed on the surface of the transmission shaft, a cylinder is fixed on one side of the mounting plate 2, and a thimble is fixed on the extended end of the cylinder, a motor 2 is installed on one side of the mounting plate 2, and a pressure claw is fixed on the rotating end of the motor 2, a plurality of torque sensors are installed on the upper end surface of the lifting platform, and an encoder is installed on one side of the mounting plate 2;

[0010] A profile is installed on the upper end surface of the workbench, and a display module is assembled on the surface of the profile via a connecting seat.

[0011] Preferably, the SCU control module is arranged below the SBW assembly for connection with the SBW assembly.

[0012] Preferably, the transmission shaft passes through the support plate and is sleeved with the inner cavity of the sleeve.

[0013] Preferably, the ejector pin passes through a sleeve and is connected to a mounting plate, and the ejector pin is connected to one side of the SBW assembly.

[0014] Preferably, the pressure claw is connected to the sleeve through and through, and the pressure claw is arranged at one end of the SBW assembly.

[0015] Preferably, the plurality of torque sensors are respectively sleeved on the surface of the transmission shaft.

[0016] Preferably, the pressing claw forms a flip structure through motor 2 and mounting plate 2, and is used to squeeze a button at one end of the SBW assembly.

[0017] Preferably, the ejector pin forms a retractable structure with the second mounting plate through a cylinder, and is used to squeeze a button on one side of the SBW assembly.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, the device can perform three SBW durability tests at the same time and run stably for up to 30,000 test cycles. In order to ensure the stability of the test, the position origin of the servo motor is locked from the start of the software operation, and the rotation angle of the servo motor is recorded during the entire shifting process to ensure that the angle deviation of each servo motor rotation is stable. In order to ensure the long-term operation of the software, an independent thread is added to release computer memory once every hour.

[0021] 2. In the present invention, the device can be based on the requirements of various performance tests formulated by customers, combined with the characteristics and development trends of current virtual instruments, and by selecting appropriate hardware equipment, the software design is completed on LabVIEW to realize the SBW durability test system, which is simple to operate, stable and reliable in testing, and automatically saves the data collected during the test and outputs the test report.

[0022] 3. In the present invention, the SBW assembly of the device is easy to install up and down, which is convenient for the staff to assemble and test. At the same time, the bracket can be placed in a temperature box to simulate different air environments, which is convenient for simulating accurate testing operations in different environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front view structural diagram of a LabVIEW-based SBW assembly durability testing device in the present invention;

[0024] Figure 2 It is a structural schematic diagram of the workbench in the present invention;

[0025] Figure 3 It is a front view of the structure of the connection between the support plate and the bracket in the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of the connection between the support plate and the bracket in the present invention from a rear view;

[0027] Figure 5 It is a schematic diagram of the structure of the support plate in the present invention from the front;

[0028] Figure 6 It is a schematic diagram of the structure of the support plate in the present invention from a rear view;

[0029] Figure 7 It is a structural schematic diagram of the bracket in the present invention;

[0030] Figure 8 It is a schematic diagram of the gear shifting in the present invention;

[0031] Fig. 9 A schematic diagram of the test system design framework in the present invention;

[0032] Fig.10It is a flowchart of the testing software program in the present invention;

[0033] Fig.11 This is a schematic diagram of user data of the front panel in the present invention;

[0034] Fig.12 It is a schematic diagram of the main program in the present invention;

[0035] Fig.13 It is a schematic diagram of the correct synchronous acquisition method in the present invention;

[0036] Fig.14 A schematic diagram of converting voltage into force value in the present invention;

[0037] Fig.15 It is a schematic diagram of the collection method actually used in the present invention;

[0038] Fig.16 This is a schematic diagram of the initial display method in the present invention;

[0039] Fig.17 It is a schematic diagram of the improved display method in the present invention.

[0040] In the figure: 1. electrical cabinet; 2. workbench; 3. guide rod; 4. lifting platform; 5. lifting seat; 6. support plate; 7. sleeve; 8. bracket; 9. SBW bracket; 10. SBW assembly; 11. SCU control module; 12. motor 1; 13. transmission shaft; 14. mounting plate 1; 15. lever 1; 16. lever 2; 17. mounting plate 2; 18. cylinder; 19. ejector pin; 20. motor 2; 21. pressure claw; 22. torque sensor; 23. encoder; 24. profile; 25. display module. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1-Figure 17, a LabVIEW-based SBW assembly durability testing device, comprising an electrical cabinet 1, a workbench 2 is fixed on the upper end surface of the electrical cabinet 1, a plurality of guide rods 3 are fixed on the upper end surface of the workbench 2, a lifting platform 4 is sleeved between the surfaces of the plurality of guide rods 3, a lifting seat 5 is installed between the electrical cabinet 1 and the lower end surface of the lifting platform 4, a plurality of support plates 6 are fixed on the upper end surface of the lifting platform 4, a sleeve 7 is fixed on one side of the support plate 6, a bracket 8 is fixed on the extended end surface of the sleeve 7, an SBW bracket 9 is assembled in the inner cavity of the bracket 8, an SBW assembly 10 is installed on the upper end surface of the SBW bracket 9, and an SCU control module 11 is installed on the lower end surface of the SBW bracket 9;

[0043] A plurality of motors 12 are installed on one side of the upper end surface of the lifting platform 4, a transmission shaft 13 is installed on the output end of the plurality of motors 12, a mounting plate 14 is fixed on the extended end of the transmission shaft 13, a lever 15 is fixed on one side of the surface of the mounting plate 14, a lever 2 16 is fixed on the other side of the surface of the mounting plate 14, a mounting plate 2 17 is installed on the surface of the transmission shaft 13, a cylinder 18 is fixed on one side of the mounting plate 2 17, a ejector pin 19 is fixed on the extended end of the cylinder 18, a motor 20 is installed on one side of the mounting plate 2 17, a pressure claw 21 is fixed on the rotating end of the motor 20, a plurality of torque sensors 22 are installed on the upper end surface of the lifting platform 4, and an encoder 23 is installed on one side of the mounting plate 2 17;

[0044] A profile 24 is installed on the upper end surface of the workbench 2, and a display module 25 is assembled on the surface of the profile 24 through a connecting seat;

[0045] Assemble the SBW assembly 10 on the upper end of the SBW bracket 9, and assemble the SCU control module 11 on the lower end of the SBW bracket 9, so that the SCU control module 11 is connected to the SBW assembly 10, and then connected to the monitoring equipment of the electrical cabinet 1 through a connecting line, and the SBW bracket 9 is installed in the bracket 8;

[0046] At this time, the output end of the motor 12 rotates, driving the transmission shaft 13 to rotate, and the transmission shaft 13 drives the mounting plate 14 to flip the angle, so that the lever 15 and the lever 2 16 mounted on the bottom end of the mounting plate 14 flip, and the lever 15 and the lever 2 16 flip and drive the SBW assembly 10 to shift, simulating the gear shifting action;

[0047] The telescopic end of the cylinder 18 drives the ejector pin 19 to telescope and move, and the ejector pin 19 squeezes the outer side of the SBW assembly 10, thereby squeezing the outer side of the SBW assembly 10 to simulate the gear shifting operation;

[0048] The output end of the second motor 20 drives the pressing claw 21 to flip, so that the pressing claw 21 squeezes the rear end of the SBW assembly 10, simulating the operation of pressing the P gear;

[0049] The SBW assembly 10 is mainly composed of a handball, an E-shifter and an SCU. The handball has a Park button and an Unlock button. The E-shifter is a shift lever that can be pushed from the Stable position to the A1, A2, B1, B2 positions in the up and down directions, and automatically returns to the Stable position after the push is completed. The SCU is a gear controller that controls the vehicle to shift into the target gear after the shift lever is pushed to the target gear position, and then sends the target gear information through the CAN bus. During the test, the handball and the E-shifter have been assembled together, and a wiring harness is required to connect the SCU and the E-shifter.

[0050] E-shiter contains a total of 5 positions, namely A2 position, A1 position, Stable position, B1 position, and B2 position.

[0051] like Figure 8 As shown, there are a total of 4 gears, namely P gear (Parking gear. Used when the car is turned off or parked for a long time), R gear (Reverse gear. Used when reversing), N gear (Neutral gear. Used for temporary parking), and D gear (Drive gear, used for normal driving).

[0052] Test system:

[0053] like Fig. 9 As shown, this design system consists of a host computer, motor, cylinder, PLC, torque sensor, encoder, acquisition board, CAN card, etc.

[0054] PC is the host computer, the transmission device is the servo motor and the drag shaft, and the key device is the cylinder;

[0055] The host computer controls the power supply to SCU and E-shifter through RS-232 communication, and then controls the servo driver through RS-458 communication to control the motor rotation. The motor rotation drags the shaft mechanism to move the shift lever to shift gears, and communicates with PLC through ModbusTCP protocol;

[0056] During the gear shifting process, the torque sensor and encoder are used to collect signals during the rotation of the motor. The signals are then transmitted to the host computer through the DAQ acquisition system, i.e., the acquisition board. The host computer uses LabVIEW software to process the signals and obtain the torque or force value and angle.

[0057] During the shifting process, the SCU transmits signals to the host computer through the CAN bus. The E-shifter outputs PWM waves to the acquisition board, which are then transmitted to the host computer to calculate the PWM wave duty cycle. The host computer determines whether the shifting is successful by judging the message transmitted by the SCU, and whether the shifting process is normal by judging the torque, angle and duty cycle. The durability of the product gear is verified by continuously executing the shifting action.

[0058] Software Design:

[0059] like Fig.10 As shown, when the software starts running, it will be initialized first, and the set parameters will be imported into the software. Then, according to the selected test mode, it will choose to power on the SCU or E-shifter, initialize the PLC, start the force value and angle acquisition thread and the CAN read and write thread, and then enter the loop to execute the test, first execute the motor cylinder action, then judge the test value, and finally display it. At the end of a cycle, it will be judged whether it is equal to the set number of cycles. If it is, it will exit the cycle, otherwise it will continue to execute the next cycle until the test is completed and then the motor and power output are turned off;

[0060] The front panel is used for data display and user operation, so the simpler the better. The front panel of this software mainly consists of 3 buttons, test record table, CAN message display table, and angle force characteristic curve.

[0061] like Fig.11 As shown in the figure, the corresponding operation is executed after the button is clicked. The test record table records the executed test steps, test range, test value and test results. The CAN message display table displays the read message in real time. The angle-force characteristic curve is an XY graph with angle as X-axis and force as Y-axis. It will be displayed or updated only when the step of testing angle is executed. After clicking the menu button, the menu selection interface will be entered, where you can select the test mode or enter the parameter setting interface, etc.

[0062] Main program:

[0063] like Fig.12 As shown, the overall framework of the software is composed of while loops, queues and conditional structures. Strings are passed through the queue to execute branches of the conditional structure.

[0064] An event structure is added to the top loop, and the buttons on the front panel are used to trigger this event structure to execute different programs. The middle loop is the core part of the entire software, which is mainly used to control various instruments and execute test programs. There are many loops below. For the overall simplicity and clarity, these loops are encapsulated into sub-VIs. Among them, Queue Read CAN.vi is mainly for sending and reading CAN messages, ReadDAQ Loop.vi is mainly for real-time reading of angles and force values, Save Data.vi is mainly for saving angles, force values ​​and CAN messages, PLC Heartbeat.vi is mainly for continuously sending 0 and 1 to the PLC alternately (to avoid the host computer crashing), and Clear Memory Loop.vi is mainly for clearing the system's running memory every hour.

[0065] Degree and force value collection:

[0066] like Figure 13-Figure 15 As shown, because it is necessary to draw the angle-force characteristic curve, the angle and force value need to be collected synchronously. The force value is output by the torque sensor as an electrical signal to the analog input (AI) terminal of the PCI-6220 board, and the angle is output by the encoder as a pulse signal to the counter input (CounterInput) terminal of the PCI-6220 and PCI-6602 boards. The correct way to synchronize the acquisition is to start the analog acquisition and counter acquisition tasks at the same time, and the two should use the same sampling clock frequency. However, since the PCI-6220 contains a 100K clock, the PCI-6602 does not have a 100K clock, and the minimum clock is only 20M (this clock frequency is too high), so this method is difficult to implement without changing the hardware.

[0067] Since it is impossible to truly synchronize data, the interval between AI and Counter data collection can be minimized to approximately achieve synchronization. Fig.13 The method currently used is shown in the figure. The counter uses single sampling and reads one angle in one cycle. AI uses continuous multi-sampling and reads N voltage values ​​in each cycle. The N voltage values ​​are averaged to get a value. This average voltage corresponds to the angle of this time. The time of each cycle is set to 11ms, and the sampling period of AI is set to 10ms. The number of samples used in this vi is 100, and the sampling rate is 10000, that is, the sampling period = number of samples / sampling rate = 100 / 10000 = 10ms. In this way, the interval between angle acquisition and voltage acquisition differs by 9ms, which can be approximately synchronized.

[0068] Since AI collects raw electrical signals, it needs to be converted into force values. The output torque of the torque sensor is plus or minus 7.5 N·m, and the output voltage is 0-5V, so the electrical signal needs to be amplified 3 times to get the torque. Torque = lever arm × force, force = torque / lever arm, the lever arm is 0.0945m, and the force value can be obtained by dividing the torque by the lever arm. The obtained force value and angle are created into an array and transmitted using a queue.

[0069] Force angle data display:

[0070] like Fig.16 As shown, the initial design method is to start the above acquisition thread before each loop starts, and then create an array of the data collected each time and put it into the shift register of the while loop. After a loop ends, stop the while loop, take out all the data in the shift register and pass it to the curve display VI for processing and displaying the characteristic curve. However, this design system is a durable system and needs to be cycled hundreds of thousands of times. Therefore, it is necessary to record the angle of each rotation of the motor in order to analyze whether the shift lever is pushed to the specified position each time. Since the encoder is incremental, that is, when the angle acquisition task is started, the default current position is 0 degrees. Therefore, to record the angle of each rotation, the task must be started only once, and the acquisition loop cannot be stopped before the entire test is completed. In this case, the initial design method is unreasonable, and the use of functional variables for transmission will cause data conflicts.

[0071] After thinking about it, I came up with a solution. I opened a separate thread for displaying the curve. The acquisition thread wrote each angle and force value into the queue, dequeued it in the thread displaying the curve, and created an array with the previous data and put it into the shift register of the loop. In this way, the data within a period of time can be saved. After the test steps are completed, all the saved data are input into the front panel display.vi for display processing.

[0072] like Fig.17As shown, the collected original data of angle force value is jittery and not smooth after being plotted into characteristic curve. This is caused by the slow loading torque of the motor. Therefore, the curve is smoothed and filtered. The front panel shows that .vi splits the input two-dimensional array and extracts the force value for smoothing filtering. Smoothing filtering is a low-frequency enhanced spatial domain filtering technology. It has two purposes, one is blurring and the other is eliminating noise. Smoothing filtering in the spatial domain is generally performed using a simple averaging method, which is to calculate the average brightness value of neighboring pixel points. The size of the neighborhood is directly related to the smoothing effect. The larger the neighborhood, the better the smoothing effect. However, if the neighborhood is too large, smoothing will cause greater loss of edge information. , so that the output image becomes blurred, so the size of the neighborhood needs to be reasonably selected. The filter vi in ​​this vi is written based on the principle of median filtering, that is, a moving window with an odd number of points is used, and the value of the center point of the window is replaced by the median of each point in the window (assuming that there are five points in the window, and their values ​​are 80, 90, 200, 110 and 120, then the median of each point in this window is 110). The filtered force value and the angle of the corresponding station are bundled into a cluster and then input into the XY diagram of the front panel. Note that the X axis is on the top, the Y axis is on the bottom, the corresponding angle is on the top and the force value is on the bottom. Finally, the filtered force value and angle are created into an array and passed to the saving thread through the queue;

[0073] It can carry out 3 SBW durability tests at the same time, and run stably for up to 30,000 test cycles. In order to ensure the stability of the test, the position origin of the servo motor is locked from the start of the software operation. The rotation angle of the servo motor is recorded during the entire shifting process to ensure that the angle deviation of the servo motor is stable each time. In order to ensure the long-term operation of the software, an independent thread is added to release the computer memory every 1 hour. Since the product to be tested needs to communicate with CAN and needs to send the specified CAN message cyclically, and the messages with different IDs require different cycle periods, how to send messages with different cycles without adding independent threads is a key point. After thinking and observation, it is found that messages with different cycles are multiples of 5ms, so it is only necessary to control the refresh interval of a cycle to 5ms, and then divide the number of loop executions i by n (n is the message period per frame / 5ms) to take the remainder. When the remainder is equal to 0, send this frame of message. In this way, multiple frames of CAN messages with different cycles can be sent in one cycle, saving computer memory.

[0074] According to the requirements of various performance tests set by customers, combined with the characteristics and development trends of current virtual instruments, by selecting appropriate hardware equipment, the software design was completed on LabVIEW, and the SBW durability test system was realized. The operation is simple, the test is stable and reliable, and the data collected during the test process is automatically saved and the test report is output;

[0075] Virtual instruments can replace some traditional measuring instruments, such as oscilloscopes, logic analyzers, spectrum analyzers, etc. They can be used in automatic control systems and can be freely constructed into special instrument systems. Virtual instruments have been used in various industries, especially in the field of experiments and tests. They are the product of the deep integration of measurement and control technology and computer technology. They blur the boundary between measuring instruments and computers. They use the powerful and efficient digital signal processing and control capabilities of computers, combined with high-speed and high-precision A / D and D / A conversion cards, to achieve the same or even stronger functions as traditional special instruments, forming virtual instruments.

[0076] The hardware part of the system, from the industrial computer to the selection of various instruments and sensors, transmits the output signal to the NI acquisition board through each sensor, and then reads the data from the buffer area of ​​the acquisition board with the DAQmx module in the LabVIEW software, so as to quickly and effectively complete the acquisition and reading of the required signals. This method has the characteristics of simple configuration, compact structure and cost saving, and it is based on the internal bus of the PC, so that the original data can be transmitted to the computer in the most effective way, and the transmission speed is very fast.

[0077] See also Figure 2 The SCU control module 11 is disposed below the SBW assembly 10 and is used to connect with the SBW assembly 10 .

[0078] See also Figure 3 The transmission shaft 13 passes through the support plate 6 and is sleeved with the inner cavity of the sleeve 7.

[0079] See also Figure 6 , Figure 7 The ejector pin 19 passes through the sleeve 7 and is sleeved with the mounting plate 14 , and the ejector pin 19 is connected to one side of the SBW assembly 10 .

[0080] See also Figure 6 , Figure 7 The pressure claw 21 is connected with the sleeve 7 through the sleeve, and the pressure claw 21 is arranged at one end of the SBW assembly 10.

[0081] See also Figure 3 , multiple torque sensors 22 are respectively sleeved on the surface of the transmission shaft 13.

[0082] See also Figure 6 , Figure 7 The pressing claw 21 forms a flip structure through the motor 20 and the mounting plate 2 17 to squeeze the button at one end of the SBW assembly 10 .

[0083] See also Figure 6 , Figure 7 The ejector pin 19 forms a retractable structure with the cylinder 18 and the mounting plate 17 to squeeze the button on one side of the SBW assembly 10.

[0084] A working method of a SBW assembly durability testing device based on LabVIEW comprises the following steps:

[0085] First, assemble the SBW assembly 10 on the upper end of the SBW bracket 9, and then assemble the SCU control module 11 on the lower end of the SBW bracket 9, so that the SCU control module 11 is connected to the SBW assembly 10, and then connected to the monitoring equipment of the electrical cabinet 1 through the connecting line, and the SBW bracket 9 is installed in the bracket 8. At this time, the output end of the motor 12 rotates, driving the transmission shaft 13 to rotate, and the transmission shaft 13 drives the mounting plate 14 to flip the angle, so that the bottom end of the mounting plate 14 is facing the surface mounted dial The lever 15 and the lever 2 16 are flipped, and the flipping of the lever 15 and the lever 2 16 drives the SBW assembly 10 to be shifted to simulate the gear shifting action, and the telescopic end of the cylinder 18 drives the ejector pin 19 to telescopically move, and the ejector pin 19 squeezes the outside of the SBW assembly 10, thereby simulating the gear shifting operation by squeezing the outside of the SBW assembly 10, and the pressure claw 21 is driven to flip through the output end of the motor 2 20, so that the pressure claw 21 squeezes the rear end of the SBW assembly 10 to simulate the operation of pressing the P gear, thus completing the working principle of the present invention.

[0086] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A LabVIEW-based SBW assembly durability testing device, comprising an electrical cabinet (1), characterized in that: A workbench (2) is fixed to the upper end surface of the electrical cabinet (1), a plurality of guide rods (3) are fixed to the upper end surface of the workbench (2), a lifting platform (4) is sleeved between the surfaces of the plurality of guide rods (3), a lifting seat (5) is installed between the electrical cabinet (1) and the lower end surface of the lifting platform (4), a plurality of support plates (6) are fixed to the upper end surface of the lifting platform (4), a sleeve (7) is fixed to one side of the support plate (6), a bracket (8) is fixed to the extended end surface of the sleeve (7), an SBW bracket (9) is installed in the inner cavity of the bracket (8), an SBW assembly (10) is installed on the upper end surface of the SBW bracket (9), and an SCU control module (11) is installed on the lower end surface of the SBW bracket (9); A plurality of motors (12) are mounted on one side of the upper end surface of the lifting platform (4), a transmission shaft (13) is mounted on the output end of the plurality of motors (12), a mounting plate (14) is fixed to the extended end of the transmission shaft (13), a lever (15) is fixed to one side of the surface of the mounting plate (14), a lever (16) is fixed to the other side of the surface of the mounting plate (14), a mounting plate (17) is mounted on the surface of the transmission shaft (13), a cylinder (18) is fixed to one side of the mounting plate (17), a pin (19) is fixed to the extended end of the cylinder (18), a motor (20) is mounted on one side of the mounting plate (17), a pressure claw (21) is fixed to the rotating end of the motor (20), a plurality of torque sensors (22) are mounted on the upper end surface of the lifting platform (4), an encoder (23) is mounted on one side of the mounting plate (17); A profile (24) is installed on the upper end surface of the workbench (2), and a display module (25) is assembled on the surface of the profile (24) via a connecting seat; The ejector pin (19) passes through the sleeve (7) and is sleeved with the first mounting plate (14), and the ejector pin (19) is connected to one side of the SBW assembly (10); the ejector pin (19) forms a retractable structure with the second mounting plate (17) through the cylinder (18), and is used to squeeze a button on one side of the SBW assembly (10); The pressing claw (21) is connected to the sleeve (7) through the pressing claw (21), and the pressing claw (21) is arranged at one end of the SBW assembly (10); the pressing claw (21) forms a flip structure through the second motor (20) and the second mounting plate (17), and is used to press the button at one end of the SBW assembly (10); The plurality of torque sensors (22) are respectively sleeved on the surface of the transmission shaft (13).

2. The SBW assembly durability testing device based on LabVIEW according to claim 1, characterized in that: The SCU control module (11) is arranged below the SBW assembly (10) and is used to be connected to the SBW assembly (10).

3. The SBW assembly durability testing device based on LabVIEW according to claim 1, characterized in that: The transmission shaft (13) passes through the support plate (6) and is sleeved into the inner cavity of the sleeve (7).

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