Vehicle sensor testing tool, testing device and testing method

Abstract

The invention provides a vehicle sensor test tool, a test device and a test method. The test device comprises a test box, a cover plate, a mounting plate, a display screen, a control unit and the like. The test method comprises the following steps: firstly, mounting the gear sensor, the rotating speed sensor, the electromagnetic valve plate and the plug in corresponding mounting grooves of the test box; turning on a power supply, and checking a circuit conduction state and initial data of each sensor through a display screen; the shifting part of the gear sensor is manually shifted to verify the gear detection accuracy; controlling the motor to drive the gear at different rotating speeds, and comparing the rotating speed of the motor with detection data of the rotating speed sensor to judge performance; and disassembling the components after the test is completed. According to the method, an integrated device is utilized, joint testing can be carried out on various vehicle sensors and plugs at the same time, whether all parts are qualified or not is rapidly detected by simulating actual working conditions, the detection process is simplified, the detection efficiency and accuracy are remarkably improved, and the testing cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sensor testing devices, and particularly relates to a vehicle sensor testing tooling, a testing device and a testing method. Background Art

[0002] In a modern automotive transmission system, a gear position sensor, a transmission gear speed sensor, and a transmission solenoid valve constitute the core components for achieving precise gear shifting and power transmission.

[0003] Gear position sensor: Detects the gear position (P / R / N / D / S, etc.) selected by the driver, and converts the mechanical operation into an electrical signal to be transmitted to the transmission control unit (TCU).

[0004] Transmission gear speed sensor: Monitors the speed of the transmission gears to determine whether the current gear position matches the driving requirements.

[0005] Transmission solenoid valve: After receiving the electrical signal from the TCU, it controls the on / off or pressure magnitude of the hydraulic oil circuit, and manipulates actuators such as clutches and brakes to achieve gear shifting actions.

[0006] The number of solenoid valves on the transmission is generally around 4 - 8. Usually, a solenoid valve plate (oil circuit plate) is used to connect to multiple solenoid valves. The solenoid valve plate is provided with power connection pins respectively corresponding to different solenoid valves. Each solenoid valve is correspondingly connected to two power connection pins. The power connection pins are connected to a plug through a wire harness, and the plug is connected to the control unit. Due to the large number of power connection pins on the solenoid valve plate, it is necessary to detect whether the welding of the power connection pins and the wire harness is correct, and it is necessary to detect whether the wire harness connected to the power connection pins can conduct electricity after being powered on.

[0007] The gear position sensor needs to detect whether its detection and induction of gear position changes are qualified. The transmission gear speed sensor needs to detect whether its detection of the transmission gear speed is qualified.

[0008] However, in the prior art, the testing of the gear position sensor, the gear speed sensor, and the solenoid valve plate is usually carried out separately.

[0009] However, due to the cooperative working relationship of the three, these three components are connected together during production and manufacturing. Conducting separate detections is rather cumbersome, prolongs the detection cycle, and is also prone to component damage due to multiple disassembly and assembly. Therefore, it is necessary to develop a device that can conduct combined testing on the three.

[0010] The prior art relatively close to the present application: Patent Application No. CN201410825920.7, a transmission gear position sensor signal testing device and testing method. Summary of the Invention

[0011] In view of the problems pointed out in the background technology, the present invention proposes a vehicle sensor testing tool, a testing device and a testing method to solve the above technical problems.

[0012] The technical solution of the present invention is achieved in this way: A vehicle sensor testing tool comprises a flippable cover plate, a mounting plate spaced apart from the cover plate is provided above the cover plate, a mounting groove penetrating the upper and lower sides of the cover plate is provided on the mounting plate, a supporting portion is provided on the side wall of the mounting groove, a spring is provided on the upper side surface of the supporting portion, two electrical connection pins are provided at positions on the cover plate corresponding to the mounting groove, the two electrical connection pins penetrate the upper and lower sides of the cover plate, the upper ends of the two electrical connection pins are arranged lower than the lower side of the mounting plate, and a clamping device that can move up and down is provided above the mounting plate.

[0013] A vehicle sensor testing device includes a test box, on which are provided mounting grooves for connecting a gear position sensor, a speed sensor, a solenoid valve plate, and a plug respectively; The test box is provided with a display screen and a control unit connected thereto; The solenoid valve plate has a plurality of electrical connection pins 1, and a mounting groove connected to the solenoid valve plate is provided with electrical connection pins 2 corresponding to the electrical connection pins 1, and the electrical connection pins 2 are connected to the control unit; Also includes expansion joints; The first power connection pin, the gear position sensor, the speed sensor, and the expansion connector are respectively connected to the plug through wires. The plug has a third power connection pin connected to the first power connection pin, the gear position sensor, the speed sensor, and the expansion connector respectively. A fourth power connection pin corresponding to the third power connection pin is provided in the installation slot of the connecting plug. The fourth power connection pin is connected to the control unit. The test box is provided with a gear corresponding to the rotation speed sensor and a motor for driving the gear to rotate, and the motor is connected to the control unit.

[0014] The present invention is further configured such that the gear position sensor has a toggle portion that can be toggled to correspond to different gear positions.

[0015] The present invention is further configured such that the test box is also provided with a clamping device for clamping and fixing the rotation speed sensor, the solenoid valve plate and the plug placed in the installation groove.

[0016] The present invention is further configured such that four mounting plates are provided on the upper side of the test box, the mounting grooves are provided on the mounting plates, and the mounting plates are fixedly connected to the test box.

[0017] The present invention is further configured such that a power supply interface is provided on the control unit.

[0018] The present invention is further configured such that the test box is configured with an upper opening, an openable cover is connected to the upper opening of the test box, the mounting groove and the display screen are both arranged on the upper side of the cover, and the control unit, gears, and motor are all arranged on the lower side of the cover.

[0019] The present invention is further configured to include a switch for controlling the on and off of the power supply of the control unit, and button one and button two for controlling the acceleration and deceleration of the motor respectively. The switch, button one and button two are respectively connected to the control unit.

[0020] A method for testing a vehicle sensor comprises the following steps: Step 1: Install the gear position sensor, speed sensor, solenoid valve plate and plug in the corresponding installation slots on the test box; Step 2. Turn on the power switch on the test box, and check whether the circuit formed by the corresponding pin 1, pin 2, pin 3, pin 4, and wires is in a conducting state through the display screen. The display screen can display the on-off status of all pins 1 respectively; check the current gear position detected by the gear position sensor through the display screen; check the current speed of the gear detected by the speed sensor through the display screen; Step 3, manually toggle the toggle part of the gear position sensor to check whether the current gear position displayed on the display screen is consistent with the gear position where the toggle part is located, and operate the toggle part to test all gear positions at least once; Step 4, the motor speed can be controlled by the control unit to be A1, A2, A3...AN, and the speed from A1 to AN gradually increases; each time button 1 is pressed, the motor speed increases once according to the speed gradient; each time button 2 is pressed once, the motor speed decreases once according to the speed gradient; the motor speed displayed on the display screen is compared with the speed detected by the speed sensor to determine whether the speed sensor is qualified; Step 5: After the test is completed, remove the gear position sensor, speed sensor, solenoid valve plate, and plug from the test box.

[0021] The present invention is further configured to further include a signal generator and an oscilloscope connected to the expansion connector.

[0022] By adopting the above technical solution, the beneficial effects of the present invention are as follows: The test fixture of the present invention facilitates the rapid installation and fixation of the component to be tested, and because the second electrical connection pin is located in the area between the mounting plate and the cover plate, it is possible to intuitively see whether the electrical contact between the component to be tested and the second electrical connection pin is good.

[0023] The testing device of the present invention can test the gear position sensor, the speed sensor, the electromagnetic valve plate and the plug at the same time to detect whether each component is qualified, thereby simplifying the testing process and improving the testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 It is a schematic diagram of the front structure of the present invention.

[0026] Figure 2 It is a schematic diagram of the rear structure of the present invention.

[0027] Figure 3 It is a schematic diagram of the top structure of the present invention.

[0028] Figure 4 It is a schematic diagram of the structure inside the test box of the present invention.

[0029] Figure 5 It is a schematic diagram of the structure of the gear position sensor, speed sensor, solenoid valve plate and plug of the present invention.

[0030] Figure 6 The structure diagram of the clamping device of the present invention is shown in FIG. Figure 1 .

[0031] Figure 7 The structure diagram of the clamping device of the present invention is shown in FIG. Figure 2 .

[0032] Figure 8 This is a schematic diagram of the mounting groove structure for connecting the solenoid valve plate of the present invention.

[0033] Explanation of the numbers in the accompanying drawings: cover plate 1, mounting plate 2, mounting groove 3, supporting part 4, spring 5, electrical connection pin 2 6, clamping device 7, test box 8, gear sensor 9, speed sensor 10, solenoid valve plate 11, plug 12, display screen 13, control unit 14, electrical connection pin 15, expansion connector 16, electrical connection pin 3 17, electrical connection pin 4 18, gear 19, motor 20, toggle part 21, switch 22, button 1 23, button 2 24, bracket 31, fixing frame 32, guide sleeve 33, pressure rod 34, pressure plate 35, driving part 36, connecting strip 37, guide rod 38, fixing seat 41, L-shaped pressure strip 42, operating rod 43, linkage strip 44. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] The following reference Figures 1 - 8 is used to illustrate the present invention: Embodiment: A vehicle sensor test tooling includes a flip-up cover plate 1. The cover plate 1 serves as a basic load-bearing component and is in a horizontal setting state, providing stable bottom support for the tooling. At the same time, its flipping function facilitates opening the cover plate 1 to maintain and manage the internal space of the test box 8.

[0036] Above the cover plate 1, there is an installation plate 2 spaced from it. The installation plate 2 is parallel to the cover plate 1 above it, and there are columns fixedly connecting the two between the installation plate 2 and the cover plate 1, forming a double-layer space structure with a specific spacing, providing a stable space layout for the installation and testing of the solenoid valve plate 11.

[0037] On the installation plate 2, there is an installation groove 3 penetrating through its upper and lower sides, and the solenoid valve plate 11 is adaptively installed in the installation groove 3. The size of the installation groove 3 is precisely adapted to the solenoid valve plate 11, which can ensure the accurate positioning of the solenoid valve plate 11 during installation and avoid installation instability problems caused by size deviations.

[0038] On the side wall of the installation groove 3, there is a supporting part 4, and the supporting part 4 is used to support the solenoid valve plate 11 from below.

[0039] On the upper side surface of the supporting part 4, there is a spring 5, and the spring 5 exerts an upward elastic force on the solenoid valve plate 11. This elastic force can, on the one hand, assist in the installation and positioning of the solenoid valve plate 11, and on the other hand, during subsequent pressing operations, it can achieve elastic buffering and reset functions.

[0040] At the position corresponding to the installation groove 3 on the cover plate 1, there is a second power connection pin 6, which penetrates through the upper and lower sides of the cover plate 1. The upper end of the second power connection pin 6 is used for electrical contact with the first power connection pin 15 on the solenoid valve plate 11, and the lower end of the second power connection pin 6 is connected to a wire. The wire is arranged on the lower side of the cover plate 1. This layout effectively hides the wire, making the appearance of the tooling simple and regular. At the same time, it avoids problems such as entanglement and damage that may be caused by wire exposure, improving the safety and reliability of the tooling during use.

[0041] The upper end of the second power connection pin 6 is set lower than the lower side of the mounting plate 2, thereby forming a visible gap between the mounting plate 2 and the cover plate 1. Through this gap, testers can directly and clearly observe the contact state between the upper end of the second power connection pin 6 and the first power connection pin 15 on the solenoid valve board 11, which is convenient for promptly detecting problems such as poor contact and misalignment, and ensuring the accuracy of electrical connection.

[0042] Above the mounting plate 2, there is a pressing device 7 that can move up and down.

[0043] The pressing device 7 applies and releases pressure on the solenoid valve board 11 through its up and down movement. When the pressing device 7 moves downward, it applies a vertically downward pressure on the solenoid valve board 11. Under the action of the pressure, the solenoid valve board 11 moves downward against the elastic force of the spring 5, and the spring 5 is compressed until the first power connection pin 15 on the solenoid valve board 11 is in close contact with the second power connection pin 6, completing the establishment of electrical connection. When the pressure is released after the pressing device 7 moves upward, the spring 5 releases its elastic potential energy, pushing the solenoid valve board 11 to move upward and reset, which is convenient for quickly disassembling the solenoid valve board 11 for the next test operation.

[0044] Beneficial effects: Convenient installation and fixation: The matching design of the installation groove 3 and the solenoid valve board 11, combined with the auxiliary positioning functions of the supporting part 4 and the spring 5, makes the installation process of the solenoid valve board 11 simple and efficient. Without complex positioning tools and operation steps, the solenoid valve board 11 can be quickly and accurately installed in place. The pressure application of the pressing device 7 and the reset function of the spring 5 achieve the stable fixation and quick disassembly of the solenoid valve board 11 during the test process, greatly improving the test efficiency.

[0045] Intuitive electrical contact detection: The second power connection pin 6 is located in the interval area between the mounting plate 2 and the cover plate 1. During the test process, testers can directly judge whether the electrical contact between the component to be tested and the second power connection pin 6 is good through visual observation without the need for additional detection equipment. This intuitive detection method can promptly detect abnormal electrical contact situations, avoid test result errors caused by poor electrical contact, and improve the accuracy and reliability of test results.

[0046] A vehicle sensor test device includes a rectangular test box 8 with an open upper side. At the open upper side of the test box 8, there is a connectable and openable cover plate 1.

[0047] As the core bearing platform, there are four customized mounting plates 2 on the upper side of the cover plate 1, and the mounting plates 2 are fixedly connected to the cover plate 1. The mounting plates 2 are provided with mounting grooves 3 penetrating through their upper and lower sides. This modular layout realizes the physical isolation and precise positioning of the test objects, and at the same time provides stable support for subsequent electrical connection and functional testing.

[0048] The mounting grooves 3 on the four mounting plates 2 are respectively used to connect the gear position sensor 9, the rotational speed sensor 10, the solenoid valve board 11, and the plug 12. The gear position sensor 9, the rotational speed sensor 10, the solenoid valve board 11, and the plug 12 are respectively adaptively connected in the corresponding mounting grooves 3.

[0049] It also includes a display screen 13 and a control unit 14 (control circuit board). The display screen 13 is arranged on the upper side surface of the cover plate 1, and the control unit 14 is arranged on the lower side surface of the cover plate 1. The display screen 13 is connected to the control unit 14.

[0050] The space hierarchical design of the test box 8 places the display screen 13 on the upper surface of the cover plate 1 for easy operation and observation, and the control unit 14 is installed on the lower surface of the cover plate 1, optimizing the internal wiring. The wiring is hidden in the test box 8, effectively hiding the wires and making the appearance simple and regular.

[0051] The solenoid valve board 11 is long strip-shaped, and the solenoid valve board 11 has a plurality of first power connection pins 15, and the plurality of first power connection pins 15 are arranged in the length direction of the solenoid valve board 11.

[0052] On the cover plate 1 corresponding to the position of the solenoid valve board 11, there are second power connection pins 6 corresponding to and connected to the first power connection pins 15. The second power connection pins 6 penetrate through the cover plate 1. The upper end of the second power connection pins 6 is connected to the first power connection pins 15, and the lower end of the second power connection pins 6 is connected to the control unit 14 through a wire.

[0053] Solenoid valve board test circuit: The first power connection pins 15 arranged along the length direction of the long strip-shaped solenoid valve board 11 achieve electrical conduction through the second power connection pins 6 arranged correspondingly on the cover plate 1. The second power connection pins 6 penetrate through the cover plate 1, and the lower end is connected to the control unit 14 through a wire, and the upper end is in elastic contact with the first power connection pins 15, ensuring stable signal transmission and facilitating inspection of the contact state.

[0054] It also includes an expansion joint 16. Expansion joint 16: The reserved expansion interface provides functional expandability for the test device, and other components to be tested or test modules can be connected, improving the versatility and adaptability of the device.

[0055] The first power connection pins 15 of the solenoid valve board 11, the gear position sensor 9, the rotational speed sensor 10, and the expansion joint 16 are respectively connected to the plug 12 through wires.

[0056] The plug 12 has third power connection pins 17 respectively connected to the first power connection pins 15, the gear position sensor 9, the rotational speed sensor 10, and the expansion joint 16.

[0057] On the cover plate 1 corresponding to the position of the plug 12, there are fourth power connection pins 18 corresponding to and connected to the third power connection pins 17. The fourth power connection pins 18 penetrate through the upper and lower sides of the cover plate 1. The upper end of the fourth power connection pins 18 is connected to the third power connection pins 17, and the lower end of the fourth power connection pins 18 is connected to the control unit 14 through a wire.

[0058] Plug test circuit: Plug 12 is the core adapter component, and its electrical connection pin 3 17 is electrically connected to the solenoid valve plate 11, the gear position sensor 9, the speed sensor 10 and the expansion connector 16 respectively. The electrical connection pin 4 18 set on the cover plate 1 corresponds to the electrical connection pin 3 17, and also penetrates the cover plate 1 to connect the control unit 14, forming a complete signal transmission path. This double adapter design can not only test the conductivity performance of the plug itself, but also verify the connection reliability between the components.

[0059] Connect pin 2 6, connect pin 1 15, wire, connect pin 3 17, connect pin 4 18, wire, control unit 14, wire, and connect pin 2 6 to form a complete electrical circuit.

[0060] An indicator light corresponding to the second power connection pin 6 may also be provided. When the electrical circuit where the second power connection pin 6 is located is turned on, the corresponding indicator light is illuminated, and the control unit 14 controls the indicator light to illuminate.

[0061] The test box 8 is also provided with a clamping device 7 for clamping and fixing the rotation speed sensor 10 , the solenoid valve plate 11 , and the plug 12 placed in the installation groove 3 .

[0062] The gear position sensor 9 does not need to be fixed. When operating the toggle part 21 , the gear position sensor 9 can be operated while being installed in the installation slot 3 , or the toggle part 21 can be directly operated by holding the gear position sensor 9 in hand.

[0063] The structure of the clamping device 7 for clamping the solenoid valve plate 11 and the plug 12 is the same. The clamping device 7 includes a bracket 31 fixedly arranged on the cover plate 1, a fixing frame 32 is provided on the bracket 31, a guide sleeve 33 is provided at the lower end of the fixing frame 32, a pressure rod 34 that can move up and down is connected inside the guide sleeve 33, a pressure plate 35 is connected at the lower end of the pressure rod 34, and also includes an L-shaped driving part 36, one end of the driving part 36 is hinged to the upper end of the fixing frame 32, the other end of the driving part 36 is the operating end, the middle part of the driving part 36 is connected to the upper end of the pressure rod 34 through a connecting strip 37, and the two ends of the connecting strip 37 are respectively hinged to the driving part 36 and the pressure rod 34. It also includes a guide rod 38 for guiding the pressure plate 35 to move up and down. The pressure plate 35 is used to clamp and fix the solenoid valve plate 11 and the plug 12 placed in the mounting groove 3.

[0064] The clamping device 7 for clamping the gear position sensor 9 includes a fixed seat 41, an L-shaped pressure strip 42, an operating rod 43, and a linkage bar 44. The fixed seat 41 is fixedly connected to the cover plate 1, the rear end of the pressure strip 42 is hinged to the front end of the fixed seat 41, the front end of the pressure strip 42 is used to clamp and fix the gear position sensor 9, the front end of the operating rod 43 is hinged to the middle part of the pressure strip 42, the middle part of the operating rod 43 is connected to the rear end of the fixed seat 41 through the linkage bar 44, and the two ends of the linkage bar 44 are respectively hinged to the operating rod 43 and the fixed seat 41.

[0065] The test box 8 is provided with a gear 19 corresponding to the speed sensor 10 and a motor 20 for driving the gear 19 to rotate, and the motor 20 is connected to the control unit 14. The gear 19 is used to simulate the gear rotation of the gearbox. The gear 19 and the motor 20 are both arranged on the lower side of the cover plate 1. The cover plate 1 is provided with a hole for the detection part of the speed sensor 10 to pass through and extend close to the gear 19.

[0066] Speed ​​simulation module: The motor 20 is driven by the control unit 14 to drive the gear 19 to rotate, simulating the actual working condition of the gearbox. The positioning hole on the cover plate 1 accurately defines the relative position between the detection part of the speed sensor 10 and the gear 19 to ensure the accuracy of the speed detection. The control unit 14 supports multi-speed adjustment (A1 to AN), and can realize step-by-step acceleration and deceleration control through button 1 23 and button 2 24 to meet the needs of different test scenarios.

[0067] The gear position sensor 9 has a toggle portion 21 that can be toggled to correspond to different gear positions. The toggle portion 21 is manually operated to simulate the change of the gear position of the car.

[0068] Gear position simulation module: The shifting part 21 of the gear position sensor 9, the operation stroke simulates the gear position switching of the real vehicle. When manually shifted, the gear position sensor 9 converts the mechanical displacement into an electrical signal and transmits it to the control unit 14, which is displayed in real time on the display screen 13 after processing, realizing the dynamic test of the gear position signal.

[0069] The control unit 14 is provided with a power interface for supplying power to the entire test device, and also includes a switch 22 for controlling the on and off of the power supply, and a button 1 23 and a button 24 for controlling the acceleration and deceleration of the motor 20, respectively. The switch 22, the button 1 23, and the button 2 24 are connected to the control unit 14, respectively.

[0070] The control unit 14 is the core of the device, integrating signal acquisition, processing, control and other functional modules: Power management: external power supply is realized through the power interface, and switch 22 controls the power on and off to ensure safe operation.

[0071] Data acquisition: Real-time collection of sensor signals, electrical connection status and motor speed data to provide original information for testing.

[0072] Display output: After processing the collected data, it is transmitted to the display screen 13, and the test results of each component are presented in a partitioned display manner, including the on / off state of the power connection pins of the solenoid valve board, the current gear position of the gear position sensor, the actually measured rotational speed of the rotational speed sensor, etc., which is convenient for the operator to quickly judge.

[0073] Logical control: According to the preset program or the operator's instructions, control actions such as the rotational speed adjustment of the motor 20 and the start / stop of the test process to achieve automated testing.

[0074] The test process adopts standardized operations: Install the component to be tested → Turn on the power → Detect the electrical connection → Simulate the working condition test → Data comparison and analysis → Dismantle the component. Each link is closely connected to reduce the loss of test time.

[0075] Analysis of technical advantages: Efficient integrated testing: Traditional testing requires multiple devices to separately detect the gear position sensor, rotational speed sensor, and solenoid valve board, while this device can simultaneously conduct joint tests on four components, improving the test efficiency and significantly shortening the production cycle.

[0076] Accurate simulation testing: Through the motor-gear system, simulate the real rotational speed working condition of the gearbox, and manually shift the gear position to simulate the operation of a real vehicle, making the test environment closer to the actual usage scenario and improving the accuracy of test data.

[0077] Convenient fault location: The display screen 13 real-time displays the status and test data of each component. Combined with the visual electrical connection structure, it can quickly locate fault points such as poor contact and abnormal signals, improving the efficiency of fault troubleshooting.

[0078] A test method for vehicle sensors includes the following steps: Step 1. Component installation and positioning: The operation of installing the gear position sensor 9, rotational speed sensor 10, solenoid valve board 11, and plug 12 into the corresponding installation slots 3 of the test box 8 is the basic link of the test process. The installation slots 3 on the four installation plates 2 are customized according to the outer dimensions and interface layouts of each component. For example, the long-strip installation slot 3 of the solenoid valve board 11 adapts to its multiple power connection pins 15 arranged along the length direction; the installation slot 3 of the plug 12 accurately corresponds to the distribution of the power connection pins 17. During installation, the component and the installation slot 3 achieve precise positioning through physical limits, ensuring that the power connection pins can accurately align with the corresponding power connection pins (power connection pin 15 and power connection pin 6, power connection pin 17 and power connection pin 18), laying a foundation for the stability of subsequent electrical connections. At the same time, the installation slot 3 cooperates with the pressing device 7 to apply a stable pressure after the component is installed in place, ensuring that the electrical connection is tight and reliable, and avoiding test data deviation caused by loosening.

[0079] Step 2. Initial state detection: After turning on the power switch 22, the control unit 14 starts to conduct a power-on test on the entire test circuit. The display screen 13, as a data output terminal, real-time displays the conduction status of the circuit composed of the first power connection pin 15, the second power connection pin 6, the third power connection pin 17, the fourth power connection pin 18 and the wire. For the multiple first power connection pins 15 of the solenoid valve board 11, the display screen 13 has the function of independently displaying the on / off status of each power connection pin. The tester can intuitively judge whether there are problems such as loose connection and open circuit, ensuring the smooth signal transmission path between the solenoid valve board 11 and the control unit 14. At the same time, the display screen 13 synchronously collects and displays the initial gear position signal detected by the gear position sensor 9, and the rotational speed data detected by the rotational speed sensor 10 when the gear 19 is stationary or in the initial rotational state. These initial data serve as the basis for subsequent tests. The control unit 14 stores them and makes a preliminary comparison with the preset standard values. If obvious abnormalities are found, the test can be terminated in time and the installation or component problems can be checked to avoid the progress of invalid test processes.

[0080] Step 3: Gear position sensor function test: Manually toggle the toggle part 21 of the gear position sensor 9 to simulate the gear shifting operation of a driver during actual driving. The mechanical displacement of the toggle part 21 is converted into an electrical signal through the internal structure of the sensor and transmitted to the control unit 14. After the control unit 14 analyzes and processes the signal, it displays the corresponding gear position information on the display screen 13 in real time. The tester judges the signal conversion accuracy of the gear position sensor 9 by comparing the gear position displayed on the display screen 13 with the actual gear position of the toggle part 21. To ensure the comprehensiveness of the test, it is required to conduct at least one switching test for all gears (P / R / N / D / S, etc.), covering the full working range of the sensor. During the test, the control unit 14 continuously records parameters such as the response time and signal stability of each gear shift. If situations such as a lag in the displayed gear position, jumping, or inconsistency with the actual gear position occur, it can be determined that the gear position sensor 9 is faulty and needs further repair or replacement.

[0081] Step 4: Rotational speed sensor performance verification: The control unit 14 controls the motor 20 to rotate the gear 19 at different speeds (A1, A2, A3... AN, with increasing speeds) through a preset program or manual instructions from the operator, simulating the speed changes of the transmission under different working conditions. Button 1 23 and Button 2 24 respectively achieve a step - by - step increase and decrease in the speed of the motor 20. Each time a button is pressed, the motor 20 adjusts according to a preset speed gradient. The speed sensor 10 continuously detects the rotation speed of the gear 19 and transmits the signal to the control unit 14. The control unit 14 performs a high - precision comparison between the data received from the speed sensor 10 and the actual output speed of the motor 20 (synchronously displayed on the display screen 13). The error range is set according to industry standards or enterprise requirements. If the deviation between the two data exceeds the allowable range, it is determined that the speed sensor 10 has insufficient detection accuracy; if there are situations such as data loss or abnormal fluctuations, it also indicates that the sensor performance does not meet the standard. Through multi - gear and multi - speed working condition tests, the accuracy and stability of the speed sensor 10 under different working conditions are comprehensively verified.

[0082] Step 5, Test Completion and Component Disassembly: After completing all the above - mentioned test items and confirming that the test results of each component meet the standards, the test process enters the completion stage. Turn off the power switch 22 to cut off the power supply of the test device and ensure operation safety. Release the pressure exerted by the pressing device 7 on the components. Since the installation groove 3 and the components are designed with non - adhesive and easy - disassembly features, the gear position sensor 9, speed sensor 10, solenoid valve board 11, and plug 12 can be easily removed from the corresponding installation groove 3. The disassembled components are classified and stored. If there are components that fail the test, they are marked and transferred to the repair or scrapping process; qualified components can enter the subsequent assembly link. At the same time, the test device is simply cleaned and inspected to prepare for the next test, ensuring that the entire test process forms an efficient and orderly closed - loop.

[0083] Auxiliary Fault Troubleshooting: In Step 2, if abnormal test data appears, a signal generator and an oscilloscope can be connected through the extension joint 16. Taking the solenoid valve board test as an example, if the electrical circuit is not conducting, a signal generator can be connected to the extension joint 16 to inject a standard test signal into the electrical circuit, and the signal transmission waveform can be observed through the oscilloscope to accurately locate the fault point and improve the efficiency of fault troubleshooting.

[0084] Hardware Connection and Test Path Construction: When the electrical circuit is not conducting, it indicates that there are problems such as open circuit, loose connection, or short circuit in the closed circuit composed of electrical connection pin two 6, electrical connection pin one 15, the wire, electrical connection pin three 17, electrical connection pin four 18, and the control unit 14. At this time, the signal generator and the oscilloscope are connected to the test system through the extension joint 16. The extension joint 16 is connected to the electrical connection pin three 17 of the plug 12, thereby incorporating the auxiliary equipment into the main test circuit and forming a complete detection path of "signal generator - extension joint 16 - plug 12 - solenoid valve board - control unit 14 - oscilloscope". This modular access method does not require modifying the original wiring layout of the test device, ensuring the convenience and safety of the detection operation.

[0085] Standard signal injection and excitation generation: The signal generator injects a standard test signal into the electrical circuit through the extension joint 16. This signal has stable voltage amplitude, frequency, and waveform parameters (such as sine wave, square wave). Taking the solenoid valve board test as an example, when the circuit is open and the control unit 14 cannot obtain an effective feedback signal, the standard signal output by the signal generator enters the solenoid valve board along the electrical connection pin three 17 and the electrical connection pin one 15, and then is transmitted to the oscilloscope through the electrical connection pin two 6. By injecting a signal with known characteristics, it provides a reference benchmark for subsequent waveform analysis, making the judgment of the fault point more objective.

[0086] Waveform analysis and fault feature identification: The oscilloscope captures the signal transmission waveform in the electrical circuit in real time. By comparing the differences between the standard signal and the measured waveform, the fault features are identified. If the waveform amplitude detected at the electrical connection pin two 6 is significantly attenuated or distorted, it may indicate that there is excessive contact resistance or local open circuit between the electrical connection pin one 15 and the electrical connection pin two 6; if the waveform completely disappears, it is necessary to focus on checking whether the wire between the electrical connection pin one 15 and the electrical connection pin three 17 of the plug 12 is broken. Through the time axis and voltage axis data of the oscilloscope, the specific position of the signal interruption or abnormality can be accurately determined, and the error range can be controlled within the centimeter-level line length.

[0087] Hierarchical positioning and fault point locking: Based on the waveform analysis results, a segmented troubleshooting strategy is adopted to lock the fault point. First, the test circuit is divided into three sections: "signal generator - extension joint 16 - plug 12", "plug 12 - solenoid valve board", and "solenoid valve board - control unit 14". If a normal waveform is detected at the output end of the plug 12 but no signal is received at the input end of the solenoid valve board, the fault lies in the connection line or electrical connection pins between the plug 12 and the solenoid valve board; if the waveform at the input end of the control unit 14 is abnormal, it is necessary to check the line and solder joints between the electrical connection pin two 6 and the control unit 14. By this hierarchical detection method, compared with the traditional point-by-point troubleshooting, the fault location efficiency can be improved, the test interruption time can be significantly shortened, and the overall detection efficiency can be enhanced.

[0088] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A vehicle sensor testing tooling, including a flip - up cover plate, characterized in that: A mounting plate is provided above the cover plate and spaced therefrom, a mounting groove is provided on the mounting plate and passes through the upper and lower sides thereof, a supporting portion is provided on the side wall of the mounting groove, a spring is provided on the upper side surface of the supporting portion, and two electrical connection pins are provided at the position of the cover plate corresponding to the mounting groove, the two electrical connection pins pass through the upper and lower sides of the cover plate, the upper ends of the two electrical connection pins are arranged lower than the lower side of the mounting plate, and a clamping device which can move up and down is provided above the mounting plate.

2. A vehicle sensor testing device, including a test box, characterized in that: The test box is provided with mounting slots for connecting the gear position sensor, the speed sensor, the solenoid valve plate, and the plug respectively; The test box is provided with a display screen and a control unit connected thereto; The solenoid valve plate has a plurality of electrical connection pins 1, and a mounting groove connected to the solenoid valve plate is provided with electrical connection pins 2 corresponding to the electrical connection pins 1, and the electrical connection pins 2 are connected to the control unit; Also includes expansion joints; The first power connection pin, the gear position sensor, the speed sensor, and the expansion connector are respectively connected to the plug through wires. The plug has a third power connection pin connected to the first power connection pin, the gear position sensor, the speed sensor, and the expansion connector respectively. A fourth power connection pin corresponding to the third power connection pin is provided in the installation slot of the connecting plug. The fourth power connection pin is connected to the control unit. The test box is provided with a gear corresponding to the rotation speed sensor and a motor for driving the gear to rotate, and the motor is connected to the control unit.

3. The vehicle sensor testing device according to claim 2, characterized in that: The gear position sensor has a toggle portion which can be toggled to correspond to different gear positions.

4. The vehicle sensor testing device according to claim 2, characterized in that: The test box is also provided with a clamping device for clamping and fixing the rotation speed sensor, the electromagnetic valve plate and the plug placed in the installation groove.

5. The vehicle sensor testing device according to claim 2, characterized in that: Four mounting plates are arranged on the upper side of the test box, mounting grooves are arranged on the mounting plates, and the mounting plates are fixedly connected to the test box.

6. The vehicle sensor testing device according to claim 3, characterized in that: The control unit is provided with a power supply interface.

7. The vehicle sensor testing device according to claim 2, characterized in that: The test box is provided with an upper opening, and an openable cover is connected to the upper opening of the test box. The mounting slot and the display screen are arranged on the upper side of the cover, and the control unit, gears and motor are arranged on the lower side of the cover.

8. The vehicle sensor testing device according to claim 6, characterized in that: It also includes a switch for controlling the on and off of the power supply of the control unit, and a button 1 and a button 2 for controlling the acceleration and deceleration of the motor respectively. The switch, the button 1 and the button 2 are respectively connected to the control unit.

9. A testing method for a vehicle sensor, characterized in that, The steps include: Step 1: Install the gear position sensor, speed sensor, solenoid valve plate and plug in the corresponding installation slots on the test box; Step 2. Turn on the power switch on the test box, and check whether the circuit formed by the corresponding pin 1, pin 2, pin 3, pin 4, and wires is in a conducting state through the display screen. The display screen can display the on-off status of all pins 1 respectively; check the current gear position detected by the gear position sensor through the display screen; check the current speed of the gear detected by the speed sensor through the display screen; Step 3, manually toggle the toggle part of the gear position sensor to check whether the current gear position displayed on the display screen is consistent with the gear position where the toggle part is located, and operate the toggle part to test all gear positions at least once; Step 4: The control unit can control the motor speed to be A1, A2, A3... AN, and the speeds of A1 to AN gradually increase; each time Button 1 is pressed, the motor speed increases once according to the above speed gradient; each time Button 2 is pressed, the motor speed decreases once according to the above speed gradient; compare the motor speed displayed on the display screen with the speed detected by the speed sensor to determine whether the speed sensor is qualified; Step 5: After the test is completed, remove the gear sensor, speed sensor, solenoid valve board, and plug from the test box.

10. The testing method for a vehicle sensor according to claim 9, characterized in that: It also includes a signal generator and an oscilloscope connected to the extension joint.

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