Retarder controller aging test system, tool and method

Abstract

The invention relates to the field of vehicle testing, and particularly discloses a retarder controller aging test system, tool and method, a selection circuit of the test system comprises a working current relay, a current-limiting resistor and a grounding detection relay first contact, and the current-limiting resistor and the grounding detection relay first contact are connected in series. The selection circuit is respectively connected with the power supply and the test circuit; the test circuit comprises a controller test tool and a load, the controller test tool comprises a working circuit side and a control circuit side, the working circuit side is connected to the selection circuit, the output end of the working circuit side is grounded through the load, and the no-load end of the working circuit side is grounded; the control circuit side is connected with a power supply, a signal pin of the control circuit side is connected with the CAN communication module, and an output end of the control circuit side is grounded; and the CAN communication module is powered by a power supply. According to the invention, convenient, efficient, safe and reliable aging test of the eddy current retarder controller can be realized.

Description

Technical Field

[0001] This application relates to the field of vehicle testing, and specifically to a retarder controller aging test system, tooling, and method. Background Art

[0002] A retarder controller is used to precisely manage the start of the retarder, adjust the braking force, achieve safety protection and system coordination, and it real-time regulates the working state of the retarder by collecting the operating parameters of the vehicle. Retarder controllers are mainly divided into eddy current retarder controllers and hydraulic retarder controllers. Among them, the eddy current retarder controller relies on a large current to drive the coil, and adjusts the magnetic field size by controlling the current, thereby changing the eddy current intensity to generate braking force.

[0003] After all eddy current retarder controllers leave the factory, they need to undergo aging tests to ensure their reliability and stability. Aging tests can expose potential defects of the eddy current retarder, screen out early failure products, and stabilize product performance.

[0004] The currently commonly used aging test method for eddy current retarder controllers first requires connecting the copper bars of the eddy current retarder to the power supply cables of the test machine one by one through fasteners to supply a large working current. Then, the output signal is adjusted on the test machine to simulate the working conditions of the controller for aging tests. After the test is completed, the wiring of the retarder controller is removed from the cable. The entire process is relatively cumbersome and complex, and the wiring is time-consuming and laborious with low efficiency. In addition, since a relatively large working current needs to be passed to simulate the working conditions of the eddy current retarder controller, directly performing aging tests without confirming whether the retarder controller has defects is likely to cause direct damage to the retarder controller, making it impossible to be repaired, and even causing more serious secondary damage such as damage to the test machine. Summary of the Invention

[0005] The purpose of this application is to overcome the deficiencies of the prior art and provide a retarder controller aging test system, tooling, and method that can achieve convenient, efficient, safe, and reliable aging tests for eddy current retarder controllers.

[0006] In a first aspect, a retarder controller aging test system provided by this application adopts the following technical solution: The aging test system includes a power supply, a test circuit, as well as a selection circuit and a CAN communication module; The selection circuit includes a working current relay, a current limiting resistor, and a first contact of a ground detection relay. The current limiting resistor and the first contact of the ground detection relay are connected in series. The first contact of the ground detection relay is a normally open contact. The circuit formed by the two is connected in parallel with the working current relay. The input end of the selection circuit is connected to the output end of the power supply, and the output end of the selection circuit is connected to the test circuit; The test circuit includes a controller test tooling, and a controller to be tested is installed inside the controller test tooling; the controller test tooling includes a working circuit side and a control circuit side. The power supply terminal of the working circuit side is connected to the output terminal of the selection circuit. The working circuit side is provided with output terminals that match the number of gears of the controller to be tested. The output terminals are grounded through a load. The working circuit is provided with an unloaded terminal installed with a freewheeling diode, and the unloaded terminal is grounded; the power supply terminal of the control circuit side is connected to the output terminal of the power supply. The signal pin of the control circuit side is signal-connected to the CAN communication module, and the output terminal of the control circuit side is grounded; The CAN communication module is powered by the power supply.

[0007] By adopting the above technical solution, before the aging test, the working current relay is open, and the current passes through the current-limiting resistor and the first contact of the ground detection relay into the test circuit to charge the capacitive element in the controller to be tested with a small current, and at the same time, the ground detection is carried out; when the charging is completed and the ground detection passes, the first contact of the ground detection relay automatically disconnects, and the working current relay closes to drive a large current to supply the working current to the working circuit side. At the same time, the power supply supplies power to the control circuit side, and the CAN communication module controls the controller test tooling to carry out the simulated aging test. The above technical solution realizes the distinction of the current magnitudes for the ground detection power supply before the aging test and the working current power supply during the aging test by selecting the output of the power supply through the selection circuit, and has high reliability.

[0008] Preferably, the test system further includes a prompting sound and light lamp powered by the power supply. The prompting sound and light lamp is connected in series with the second contact of the ground detection relay, and the second contact of the ground detection relay is a normally open contact.

[0009] By adopting the above technical solution, as long as the coil of the ground detection relay is attracted, the prompting sound and light lamp is in the working state for alarming, indicating that the test circuit is charging the capacitive element of the controller to be tested, or there is a ground fault. In both of these cases, the subsequent test operation of supplying power with a large working current cannot be performed.

[0010] Preferably, the working current relay is connected to a switch circuit, and the switch circuit is connected to the power supply. The switch circuit includes a third contact of the ground detection relay and a first contact of the test tooling relay connected in series. The third contact of the ground detection relay is a normally closed contact, and the first contact of the test tooling relay is a normally open contact. When both of them are closed, the coil of the working current relay is conducted, so that the contact of the working current relay closes.

[0011] By adopting the above technical solution, the closing of the working current relay is controlled by a switching circuit. As long as the coil of the grounding detection relay is closed, the normally closed contact of the grounding detection relay's third contact is open. At this time, even if the first contact of the control test tooling relay is closed, the working current relay cannot be closed, which can prevent misoperation and improve reliability.

[0012] Preferably, the test system further includes a pneumatic solenoid valve powered by the power supply. The pneumatic solenoid valve is connected in series with the second contact of the test tooling relay. The second contact of the test tooling relay is a normally open contact, and the pneumatic solenoid valve is arranged on the controller test tooling.

[0013] By adopting the above technical solution, the opening and closing of the pneumatic solenoid valve and the test relay are controlled in a linkage manner. When starting the test by closing the test relay, the solenoid valve is automatically started to lock the controller test tooling.

[0014] Preferably, the test system further includes a test host, which is signal-connected to the CAN communication module. A USB relay is connected in series with the switching circuit, and the test host is connected to the USB relay.

[0015] By adopting the above technical solution, the control signals and test data of the CAN communication module can be received by the test host for test monitoring, recording, and feedback; on the one hand, the USB relay realizes the control of the opening and closing of the switching circuit by the test host, and on the other hand, the USB relay is linked with the opening and closing of the CAN communication module through the test host, so that the CAN communication module can be automatically closed before and after the test, isolating the signal from the controller to be tested, and preventing miscontrol or controller program disorder caused by misoperation.

[0016] Preferably, the test circuit further includes a positive control relay and a negative control relay connected to the switching circuit. The control circuit side includes a positive control relay pin and a negative control relay pin. The positive control relay pin is connected to the positive control relay, and the negative control relay pin is connected to the negative control relay.

[0017] By adopting the above technical solution, the circuit control of the controller to be tested can be selected. If positive power control is adopted, the positive control relay is enabled; if negative power control is adopted, the negative control relay is enabled.

[0018] In a second aspect, a controller test tooling provided by the present application is used to test a controller to be tested and adopts the following technical solution: The controller test tooling includes a controller fixing seat, a probe fixing frame, an insulating board, and probes; The controller fixing base is of a frame structure. On one end face of the controller fixing base, a number of connecting shafts are provided. The controller to be tested is provided with connecting holes corresponding to the connecting shafts. The controller to be tested is sleeved on each connecting shaft and is arranged within the frame structure of the controller fixing base. On the end face of the controller fixing base on the same side as the connecting shafts, a pivot seat is provided. The probe fixing bracket is pivotally connected to the controller fixing base through the pivot seat and can cover the surface of the controller to be tested. On the probe fixing bracket, a probe window is opened. Outside the probe window, an insulating plate connection hole is opened. The insulating plate is connected and fixed to the probe fixing bracket through fasteners. On the insulating plate, a probe connection hole is opened. The probe connection hole is within the range of the probe window. The probe is connected within the probe connection hole, and the probe passes through the probe window. Before the test, the probe fixing bracket is opened to provide an installation space for the controller to be tested. During the test, the probe fixing bracket flips, driving the insulating plate to cover the controller to be tested and pressing the probe against the wiring copper bar of the controller to be tested.

[0019] Through the above technical solution, a flip - type probe fixing bracket is adopted. When it is opened, it is convenient for the disassembly, installation and fixing of the controller to be tested, and is convenient for performing ground detection and troubleshooting of ground faults. When it is closed, it can drive the insulating plate equipped with the probe to cover the controller to be tested, so that the probe abuts against the wiring copper bar of the controller to be tested, realizing convenient, reliable installation, fixing and electrical connection of the controller to be tested.

[0020] Preferably, the controller fixing base is provided with a pneumatic solenoid valve. The pneumatic solenoid valve is located on the top surface on the opposite side of the pivot seat. During the test, the pneumatic solenoid valve locks and fixes the probe fixing bracket at the test position.

[0021] Preferably, the controller test tooling includes a control module. The control module is provided with a ground detection button for controlling the ground detection relay and a test tooling button for controlling the test tooling relay.

[0022] Through the above technical solution, the controller test tooling is adapted to the aging test system, realizing the locking and fixing of the controller to be tested during the aging test, as well as the opening and selection of ground detection and aging detection.

[0023] In a third aspect, a controller test method provided by the present application includes the following steps: S1, setting the controller to be tested on the controller test tooling; S2, closing the ground detection relay, conducting the controller test tooling and the ground detection circuit, charging the capacitive element in the controller test tooling through the power supply, and simultaneously performing ground detection; S3. After the charging time reaches the preset value, check if there is a grounding alarm. If there is a grounding alarm, remove the controller and find the grounding fault point. If there is no grounding alarm, proceed to S4. S4. Close the USB relay through the test host, then close the test fixture relay, start the pneumatic solenoid valve to fix the controller test fixture, conduct the controller test fixture and the working current circuit, the working current relay closes, provide the working current to the working circuit side of the controller test fixture, and at the same time, the power supply supplies power to the control circuit side of the controller test fixture to start the controller detection process. S5. The test host automatically conducts the controller test item by item, and at the same time displays the test results on the screen. S6. After the test is completed, first disconnect the USB relay through the test host, then disconnect the test fixture relay, close the pneumatic solenoid valve, and remove the controller to be tested, and the entire test process ends.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The aging test system of the present application can switch between two functions of grounding detection and aging test. Before the aging test, it preferentially charges the capacitive elements of the controller to be tested and conducts grounding detection to ensure that small current charging is used to prevent impact on the circuit. When a large working current is applied during the aging test, the controller to be tested that has passed the grounding detection will not have serious failures. The present application simplifies the test process and ensures the safety and reliability of the test.

[0025] 2. The working current relay of the present application is connected to the switch circuit, so that during the grounding detection, even if the test button is pressed, the working current relay cannot be turned on, and a large current cannot be applied to the controller to be tested, avoiding the risk of misoperation.

[0026] 3. The present application can realize the on-off control of the test through the program of the test host, and conduct the monitoring, recording and feedback of the test, which is convenient to operate. The test host is linked with the opening of the CAN communication module for the opening of the test, realizing the automatic closing of the CAN communication module, so as to isolate the signal from the controller to be tested in the non-test state and prevent miscontrol or controller program disorder caused by misoperation.

[0027] 4. The present application can be compatible with the aging test of controllers with positive and negative control.

[0028] 5. The controller test fixture of the present application can realize the convenient and efficient installation and fixation of the controller to be tested, and can realize the functions of the above aging test system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1Schematic wiring diagram of a retarder controller aging test system in an embodiment of the present application; Figure 2 Schematic wiring diagram of a switch circuit of a retarder controller aging test system in an embodiment of the present application; Figure 3 Exploded view of a controller test tooling in an embodiment of the present application; Figure 4 Schematic flow diagram of a retarder controller aging test method in an embodiment of the present application. Detailed implementation manners

[0030] This specific embodiment is only an interpretation of the present application and does not limit the present application. After reading this specification, those skilled in the art can make modifications without creative contributions to this embodiment as needed, but as long as it is within the scope of the present application, it is protected by the patent law.

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts belong to the scope of protection of the present application. It should be noted that in the alternative embodiments of the present application, for relevant data such as object information, when the embodiments in the present application are applied to specific products or technologies, permission or consent of the object needs to be obtained, and the collection, use, and processing of relevant data need to comply with relevant laws, regulations, and standards of relevant countries and regions. That is to say, in the embodiments of the present application, if it involves data related to the object, it needs to be obtained under the authorization and consent of the object, the authorization and consent of relevant departments, and compliance with relevant laws, regulations, and standards of relevant countries and regions. In the embodiments, if personal information is involved, the acquisition of all personal information needs to obtain the consent of the individual. If sensitive information is involved, the separate consent of the information subject needs to be obtained, and the embodiments also need to be implemented under the authorization and consent of the object.

[0032] The embodiments of the present application will be further described in detail below with reference to the accompanying drawings of the specification.

[0033] Embodiment 1: Please refer to Figure 1 , a retarder controller aging test system according to an embodiment of the present application includes a power supply 1, a selection circuit 2, a test circuit 3, and a CAN communication module 4.

[0034] The power supply 1 is a DC24V, 250A power supply and is connected to the selection circuit 2.

[0035] The selection circuit 2 includes a working current relay K1, a current limiting resistor, and the first contact K2-1 of the ground detection relay. The current limiting resistor and the first contact K2-1 of the ground detection relay are connected in series with each other. The first contact K2-1 of the ground detection relay is a normally open contact. The circuit formed by the two is connected in parallel with the working current relay K1. The input end of the selection circuit 2 is connected to the output end of the power supply 1, and the output end of the selection circuit 2 is connected to the test circuit 3. The function of the selection circuit is to select the mode of the test system and enter the ground detection mode or the aging test mode.

[0036] The test circuit 3 includes a controller test fixture 31 and a load. The controller test fixture 31 is internally provided with a controller to be tested. The controller test fixture 31 includes a working circuit side and a control circuit side. The working circuit side is used to input a large current into the working circuit of the controller to be tested, and the control circuit side is used to input a small current into the control circuit of the controller to be tested. The power supply terminal B+ of the working circuit side is connected to the output end of the selection circuit. The working circuit side is provided with output ends matching the number of gears of the controller to be tested. Each output end is connected to the corresponding load and grounded. In this embodiment, corresponding to the 4 gears of the controller to be tested, the output ends are P1, P2, P3, and P4 respectively, and the loads are RL1, RL2, RL3, and RL4 respectively. The load parameters are all 0.6 ohms and 2.5 kW. The working circuit side is provided with an open-circuit end M- equipped with a freewheeling diode, and the open-circuit end is grounded. When performing a ground test, the controller to be tested does not work, and the current is output from the open-circuit end. The freewheeling diode generates a high-voltage reverse electromotive force when the circuit is opened or closed or the current changes suddenly, so as to provide a low-impedance discharge loop to protect the switching element. The power supply terminal of the control circuit side is connected to the output end of the power supply 1. The signal pin of the control circuit side is signal-connected to the CAN communication module 4, and the output end of the control circuit side is grounded. The CAN communication module 4 is powered by the power supply.

[0037] Before performing the aging test of the controller to be tested, the ground detection is first performed. The working current relay K1 is open, and the first contact K2-1 of the ground detection relay is closed manually. The power supply 1 supplies power to the test circuit 3 through the current limiting resistor and the first contact K2-1 of the ground detection relay.

[0038] It should be noted that since there are a large number of capacitive elements in the controller under test, the initial stage of the ground detection is actually charging the capacitor. At this time, it is impossible to distinguish whether the controller under test is in a charging state or there is a ground fault. When the capacitor is fully charged, the current in the circuit decreases, and the ground detection relay automatically disconnects. At this time, it is judged that the capacitor charging is completed and there is no ground fault in the controller under test. If the ground detection relay remains closed for a long time and exceeds the preset time, it indicates that there is a ground fault in the controller under test, and it is necessary to check the ground fault point. In this embodiment, in order to ensure the charging efficiency of the capacitive elements of the controller under test, the current-limiting resistor uses two 220-ohm, 6W resistors connected in parallel.

[0039] Furthermore, the test system further includes a prompting sound and light lamp L0 powered by the power supply 1. The prompting sound and light lamp L0 is connected in series with the second contact K2-2 of the ground detection relay. The second contact K2-2 of the ground detection relay is a normally open contact. As long as the ground detection relay is closed, the prompting sound and light lamp is in the working state for alarming, indicating that the test circuit is charging the capacitive elements of the controller under test, or there is a ground fault. In these two cases, it is not possible to perform the subsequent test operation with a large working current for power supply.

[0040] After the controller under test passes the ground detection, the ground detection relay automatically disconnects. At this time, the working current relay K1 can be controlled to close to drive a large current to supply power to the working circuit of the controller under test. At the same time, the power supply 1 supplies power to the control circuit of the controller under test. The control circuit receives the control signal of the CAN communication module and sends the test signals of each gear to the CAN communication module.

[0041] Furthermore, each load is connected in parallel with a load indicator light. In this embodiment, the load indicator lights are L1, L2, L3, and L4. When testing any gear of the controller under test, the corresponding load is connected, and the corresponding load indicator light is lit, so as to identify the current test gear.

[0042] Embodiment 2: Please refer to Figure 1 , on the basis of Embodiment 1, the aging test system further includes a switch circuit 5. The working current relay K1 is connected to the switch circuit 5, and the switch circuit 5 is connected to the power supply 1.

[0043] The switch circuit 5 includes a third contact K2-3 of the ground detection relay and a first contact K3-1 of the test fixture relay connected in series. The third contact of the ground detection relay is a normally closed contact, and the first contact K3-1 of the test fixture relay is a normally open contact. At the same time, the control circuit side input end of the controller test fixture 31 is connected to the third contact K3-3 of the test fixture relay. The third contact K3-3 of the test fixture relay is a normally open contact.

[0044] In the initial state, the first contact K3 - 1 of the test tool relay is in an open circuit, the circuit where the coil of the working current relay K1 is located is open, and the working current relay K1 is disconnected.

[0045] When performing grounding detection, since the third contact K2-3 of the grounding detection relay is a normally closed contact, it is automatically disconnected when the grounding detection relay is energized. At this time, regardless of whether the control test tool relay is closed, the loop where the coil of the working current relay K1 is located cannot be opened and closed. The working current relay K1 remains disconnected and cannot pass a large working current to the controller under test, thereby preventing misoperation, current shock and serious faults. When the capacitor of the controller under test is fully charged and there is no grounding fault in the controller under test, the grounding detection relay is automatically released, so that the third contact K2-3 of the normally closed contact grounding detection relay is closed. At this time, the first contact K3-1 of the test tool relay can be operated to close the working current relay K1 and pass a large working current to the controller under test.

[0046] Furthermore, the aging test system also includes a pneumatic solenoid valve SV powered by the power supply, the pneumatic solenoid valve SV is connected in series with the second contact K3-2 of the test fixture relay, and is a normally open contact. The pneumatic solenoid valve SV is arranged on the controller test fixture. When the first contact K3-1 of the test fixture relay is closed, the pneumatic solenoid valve SV is linked to open, and the test fixture is locked and fixed to ensure that the controller to be tested does not move during the entire aging test process.

[0047] Furthermore, the control circuit side of the controller test fixture 31 is connected in series with the third contact K3-3 of the test fixture relay, which is a normally open contact. When the first contact K3-1 of the test fixture relay is closed, the third contact K3-3 of the test fixture relay is closed in linkage, so that the power supply supplies power to the control circuit of the controller to be tested, realizing the on-off control of the linkage between the control circuit and the aging test.

[0048] Embodiment 3: See also Figure 2 On the basis of Embodiment 2, the switch circuit 5 further includes a test host 6, and the test host 6 is connected to the CAN communication module 4. The test host 6 receives the control signal and test data of the CAN communication module 4, and performs monitoring, recording and feedback of the aging test.

[0049] The switch circuit 5 is connected in series with a USB relay K4, and the test host is connected to the USB relay K4. In the test program run by the test host, a start key for controlling the USB relay K4 is included, and the start key is linked to the opening and closing of the CAN communication module 4 at the same time.

[0050] The third contact K2-3 of the grounding detection relay is closed in the initial state. If the tester accidentally operates the test tooling and the first contact K3-1 of the relay is closed at this time, it will cause a large working current to be applied to the controller under test without the capacitor being charged and without grounding detection, resulting in potential safety hazards. Through the USB relay K4, the operator must first operate the USB relay K4 to close on the operation host and confirm the start of the aging test before a large working current can be supplied, thus avoiding the risk of accidental operation. In addition, the opening and closing of the USB relay K4 are linked to the opening and closing of the CAN communication module 4, so that when the aging test is not carried out, the CAN communication module 4 is signal-isolated from the controller under test, which is equivalent to isolating the vehicle signals, preventing the controller under test from being miscontrolled due to accidental operation, or causing the program of the controller under test to be disordered, or the controller under test interfering with the vehicle signals.

[0051] Embodiment 4: Please refer to Figure 1 , based on Embodiment 2, the test circuit 3 further includes a positive control relay K5 and a negative control relay K6 connected to the switch circuit. The control circuit side of the controller test tooling includes a positive control relay pin and a negative control relay pin. The positive control relay pin is connected to the positive control relay K5, and the negative control relay pin is connected to the negative control relay K6. The above solution enables the manufacturer to freely select positive power control and negative power control when aging-testing the controller. If positive power control is adopted, the positive control relay K5 is enabled; if negative power control is adopted, the negative control relay K6 is enabled. Further, the positive control relay K5 is connected in parallel with the positive control indicator light L5, and the negative control relay K6 is connected in parallel with the negative control indicator light L6, and the positive power control or negative power control is identified through the indicator lights.

[0052] Unless otherwise specified, the pins not clearly described in the circuit diagrams of the present application (such as the power supply pin VCC, the grounding pin GND, the enable pin EN, etc.) are connected in the conventional manner of those skilled in the art, and such connections do not constitute a limitation to the technical solution of the present invention. The decoupling capacitors, pull-up / pull-down resistors and other passive devices not shown in the figures are connected in accordance with the general specifications of electronic circuit design (such as the IEEE standard), and the specific parameters can be adjusted according to the actual application scenario.

[0053] Those skilled in the art can understand that Figure 1 and Figure 2 the structures shown in

[0054] Embodiment 5: Please refer to Figure 3, A controller test tooling according to an embodiment of the present application is used to perform aging tests on a to-be-tested controller to implement the functions of the retarder controller aging test system of the present application.

[0055] The controller test tooling includes a controller fixing seat 311, a probe fixing frame 312, an insulating board 313, and probes 314.

[0056] The controller fixing seat 311 is of a frame structure. On one end face of the controller fixing seat 311, a plurality of connecting shafts 3111 are provided. The to-be-tested controller 310 is provided with connection holes corresponding to the connecting shafts. The to-be-tested controller is sleeved on each connecting shaft and is arranged within the frame structure of the controller fixing seat 311. The upper part of the to-be-tested controller 310 is the working circuit side, provided with a wiring copper bar 3101, and the lower part is the control circuit side, provided with a junction box 3102 for arranging a circuit board and plugging in signal lines to be connected to the CAN communication module.

[0057] It should be noted that in the specific implementation process, a single controller test tooling 31 can adopt an array layout form with a plurality of controller fixing seats 311 arranged, so that multiple to-be-tested controllers 310 can be installed at one time for batch testing, further improving the efficiency of the aging test. In addition, the controller test tooling 31 can be provided with structures such as rollers for easy movement, so as to move the to-be-tested controller 310 into the high-temperature aging chamber for high-temperature aging testing.

[0058] On the end face of the controller fixing seat 311 on the same side as the connecting shaft 3111, a pivot seat 3112 is provided. The probe fixing frame 312 is pivotally connected to the controller fixing seat 311 through the pivot seat 3112 and can cover the surface of the to-be-tested controller 310.

[0059] A probe window 3121 is opened on the probe fixing frame 312. An insulating board connection hole 3122 is opened outside the probe window 3121. The insulating board 313 is fixedly connected to the probe fixing frame 312 through fasteners. A probe connection hole 3131 is opened on the insulating board 313. The probe connection hole 3131 is within the range of the probe window 3121 and corresponds to the position of the wiring copper bar of the to-be-tested controller 310. A probe 314 is connected in the probe connection hole 3131, and the probe 314 passes through the probe window 3121.

[0060] Before the test, the probe fixing frame 312 is opened to provide an installation space for the to-be-tested controller 310.

[0061] During the test, the probe fixing frame 312 flips, driving the insulating board 313 to cover the to-be-tested controller 310 and pressing the probe 314 against the wiring copper bar of the to-be-tested controller 310.

[0062] Further, the controller fixing base 311 is provided with a pneumatic solenoid valve (not shown in the figure), and the pneumatic solenoid valve is located on the top surface of the pivot seat 3112 on the opposite side. During testing, the pneumatic solenoid valve locks and fixes the probe holder 312 in the test position, thereby restricting the displacement of the controller 310 to be tested and making the connection between the probe and the copper bar tight.

[0063] Further, the controller test tooling includes a control module (not shown in the figure). The control module is provided with a ground detection button for controlling the ground detection relay and a test tooling button for controlling the test tooling relay. This control module can be directly set on the test tooling or can form a remotely movable control handle through wiring.

[0064] Embodiment 6: Please refer to Figure 4 , a retarder controller aging test method according to an embodiment of the present application, which is used to perform aging tests on the controller to be tested to implement the functions of the retarder controller aging test system of the present application. Specifically, it includes the following steps: S1, Set the controller to be tested on the controller test tooling.

[0065] S2, Press the ground detection button of the control module to close the ground detection relay, conduct the controller test tooling and the ground detection circuit, charge the capacitive element in the controller test tooling through the power supply, and perform ground detection at the same time. During the charging time, the signal of the prompt sound and light can be ignored.

[0066] S3, After the charging time reaches the preset value, check whether the prompt sound and light still emits an alarm signal. In this embodiment, the preset charging time is 5S - 10S. If the prompt sound and light still emits an alarm signal, take out the controller to be tested and search for the ground fault point. If there is no ground alarm, the ground detection relay automatically disconnects and enters S4.

[0067] S4, Close the USB relay through the test host, turn on the CAN communication module, and confirm that aging tests can be started. Then press the test tooling button to close the test tooling relay, start the pneumatic solenoid valve to fix the controller test tooling, the working current relay is energized, conduct the controller test tooling and the working current circuit, provide working current to the working circuit side of the controller test tooling, and at the same time, the power supply supplies power to the control circuit side of the controller test tooling, and the detection process of the controller to be tested can be executed.

[0068] S5, Click the "Start Test" button on the screen of the test host, and the test host automatically performs aging tests on each gear of the controller to be tested item by item according to the test items, and at the same time displays the test results on the screen of the test host.

[0069] S6. After the test is completed, first disconnect the USB relay through the test host, then press the test fixture button to disconnect the test fixture relay, close the pneumatic solenoid valve, and take out the controller to be tested. Thus, the entire test process ends.

[0070] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not imply the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0071] As used in the above embodiments, depending on the context, the term "when..." can be interpreted to mean "if...", or "after...", or "in response to determining...", or "in response to detecting...". Similarly, depending on the context, the phrase "when determining..." or "if detecting (the stated condition or event)" can be interpreted to mean "if determining...", or "in response to determining...", or "when detecting (the stated condition or event)", or "in response to detecting (the stated condition or event)".

[0072] Unless otherwise defined, the technical terms or scientific terms used in this application should have the ordinary meanings understood by those of ordinary skill in the art to which this application pertains. The "first", "second", "third" and similar terms used in the specification and claims of this application do not denote any order, quantity or importance, but are only used to distinguish different components. The term "a" or "an" and the like do not denote a quantity limitation, but mean that there is at least one. The terms "comprising" or "including" and the like mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. The terms "upper", "lower", "left", "right" and the like are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0073] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

[0074] The above are all preferred embodiments of this application. It does not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application should be covered within the protection scope of this application.

Claims

1. A retarder controller aging test system, comprising a power supply and a test circuit, characterized in that: It further includes a selection circuit and a CAN communication module; The selection circuit includes a working current relay, a current limiting resistor, and a first contact of a ground detection relay. The current limiting resistor and the first contact of the ground detection relay are connected in series. The first contact of the ground detection relay is a normally open contact. The circuit formed by the two is connected in parallel with the working current relay. The input end of the selection circuit is connected to the output end of the power supply, and the output end of the selection circuit is connected to the test circuit; The test circuit includes a controller test tooling and a load. The controller test tooling houses a controller to be tested. The controller test tooling includes a working circuit side and a control circuit side. The power supply end of the working circuit side is connected to the output end of the selection circuit. The working circuit side is provided with output ends matching the number of gears of the controller to be tested. The output ends are grounded through the load. The working circuit side is provided with an open-circuit end equipped with a freewheeling diode, and the open-circuit end is grounded; The power supply end of the control circuit side is connected to the output end of the power supply. The signal pins of the control circuit side are signal-connected to the CAN communication module, and the output end of the control circuit side is grounded; The CAN communication module is powered by the power supply.

2. The aging test system for a retarder controller according to claim 1, wherein The test system further includes a prompting sound and light device powered by the power supply. The prompting sound and light device is connected in series with a second contact of the ground detection relay. The second contact of the ground detection relay is a normally open contact.

3. The aging test system for a retarder controller according to claim 1, characterized in that The working current relay is connected to a switch circuit. The switch circuit is connected to the power supply. The switch circuit includes a third contact of the ground detection relay and a first contact of the test tooling relay connected in series. The third contact of the ground detection relay is a normally closed contact, and the first contact of the test tooling relay is a normally open contact. When both are closed, the coil of the working current relay is turned on, causing the contact of the working current relay to close.

4. A retarder controller aging test system according to claim 3, characterized in that, The test system further includes a pneumatic solenoid valve powered by the power supply. The pneumatic solenoid valve is connected in series with a second contact of the test tooling relay. The second contact of the test tooling relay is a normally open contact. The pneumatic solenoid valve is arranged on the controller test tooling.

5. The aging test system for a retarder controller according to claim 3, wherein The test system further includes a test host. The test host is signal-connected to the CAN communication module. A USB relay is connected in series in the switch circuit, and the test host is connected to the USB relay.

6. The aging test system for a retarder controller according to claim 3, characterized in that The test circuit further includes a positive control relay and a negative control relay connected to the switch circuit. The control circuit side includes a positive control relay pin and a negative control relay pin. The positive control relay pin is connected to the positive control relay, and the negative control relay pin is connected to the negative control relay.

7. A controller test tooling for testing a controller to be tested, characterized in that, It includes a controller fixing seat, a probe fixing frame, an insulating board, and probes; The controller fixing seat is of a frame structure. On one end face of the controller fixing seat, several connecting shafts are provided. The controller to be tested is provided with connecting holes corresponding to the connecting shafts. The controller to be tested is sleeved on each connecting shaft and is arranged within the frame structure of the controller fixing seat; On the end face of the controller fixing seat on the same side as the connecting shafts, a pivot seat is provided. The probe fixing frame is pivotally connected to the controller fixing seat through the pivot seat and can cover the surface of the controller to be tested; A probe window is formed on the probe holder, and an insulating plate connection hole is formed outside the probe window. The insulating plate is connected and fixed to the probe holder through fasteners. A probe connection hole is formed on the insulating plate, and the probe connection hole is within the range of the probe window. The probe is connected in the probe connection hole and passes through the probe window. Before the test, the probe holder is opened to provide an installation space for the controller to be tested. During the test, the probe holder is flipped to drive the insulating plate to cover the controller to be tested and press the probe against the wiring copper bar of the controller to be tested.

8. A controller test tooling according to claim 7, characterized in that, The controller fixing seat is provided with a pneumatic solenoid valve, and the pneumatic solenoid valve is located on the top surface of the pivot seat on the opposite side. During the test, the pneumatic solenoid valve locks and fixes the probe holder at the test position.

9. A controller test tooling according to claim 7, characterized in that, The controller test tooling includes a control module. The control module is provided with a ground detection button for controlling the ground detection relay and a test tooling button for controlling the test tooling relay.

10. A controller testing method, characterized in that, It includes the following steps: S1, Set the controller to be tested on the controller test tooling. S2, Close the ground detection relay to conduct the controller test tooling and the ground detection circuit, charge the capacitor element in the controller test tooling through the power supply, and conduct the ground detection at the same time. S3, After the charging time reaches the preset value, check whether there is a ground alarm. If there is a ground alarm, take out the controller and find the ground fault point. If there is no ground alarm, go to S4. S4, Close the USB relay through the test host, then close the test tooling relay, start the pneumatic solenoid valve to fix the controller test tooling, conduct the controller test tooling and the working current circuit, the working current relay is attracted, provide the working current to the working circuit side of the controller test tooling, and at the same time the power supply supplies power to the control circuit side of the controller test tooling to start the controller detection process. S5, The test host automatically conducts the controller test item by item and displays the test results on the screen at the same time. S6, After the test is completed, first disconnect the USB relay through the test host, then disconnect the test tooling relay, turn off the pneumatic solenoid valve, and take out the controller to be tested, and the whole test process ends.

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