A retarder controller aging test system, tooling and method

Abstract

The present application relates to the field of vehicle testing, and specifically discloses a retarder controller aging test system, tooling and method, wherein the selection circuit of the test system includes a working current relay, a current limiting resistor and the first contact of the grounding detection relay, the current limiting resistor and the first contact of the grounding detection relay are connected in series, the circuit composed of the two is connected in parallel with the working current relay, and the selection circuit is connected to the power supply and the test circuit respectively; the test circuit includes a controller test tooling and a load, the controller test tooling includes 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 to the power supply, the signal pin of the control circuit side is 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. The present application can realize a convenient, efficient, safe and reliable aging test for the eddy current retarder controller.

Description

Technical Field

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

[0002] The retarder controller precisely manages retarder activation, adjusts braking force, and achieves safety protection and system coordination. It collects vehicle operating parameters to control the retarder's operating status in real time. Retarder controllers are primarily categorized as eddy current retarder controllers and hydraulic retarder controllers. Eddy current retarder controllers rely on high-current drive coils, regulating the magnetic field by controlling the current, thereby varying the eddy current intensity to generate braking force.

[0003] All eddy current retarder controllers undergo aging testing after leaving the factory to ensure their reliability and stability. Aging testing can reveal potential defects in eddy current retarders, screen out premature failures, and stabilize product performance.

[0004] The current conventional eddy current retarder controller aging test method first requires that the copper busbar of the eddy current retarder be connected to the power supply cable of the test machine by fasteners one by one, so as to carry out large working current power supply. Then, the output signal is adjusted on the test machine to simulate the working condition of the controller to carry out aging test. After the test is completed, the wiring of the retarder controller is removed from the cable. The whole process is relatively cumbersome and complicated, and the wiring is time-consuming and labor-intensive and inefficient. In addition, since the eddy current retarder controller is subjected to working condition simulation and needs to be fed with larger working current, directly carrying out aging test when it is impossible to confirm whether the retarder controller is defective can easily cause the retarder controller to be directly damaged, cannot be repaired, and even cause more serious secondary injuries such as the damage of the test machine. Summary of the Invention

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

[0006] In the first aspect, the present application provides a retarder controller aging test system, which adopts the following technical solutions:

[0007] The aging test system includes power supply, test circuit, selection circuit and CAN communication module;

[0008] 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, and a circuit composed of 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;

[0009] The test circuit includes a controller test fixture, in which the controller to be tested is installed; the controller test fixture 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 an output end matching the number of gears of the controller to be tested, the output end is grounded through a load, the working circuit is provided with a no-load end equipped with a freewheeling diode, and the no-load end is grounded; the power supply end of the control circuit side is connected to the output end of the power supply, the signal pin of the control circuit side is connected to the CAN communication module signal, and the output end of the control circuit side is grounded;

[0010] The CAN communication module is powered by the power supply.

[0011] By adopting the above technical solution, before the aging test, the working current relay is opened, and the current is passed into the test circuit through the current limiting resistor and the first contact of the ground detection relay, and the capacitor element in the controller to be tested is charged with a small current, and the ground detection is performed at the same time; when the charging is completed and the ground detection is passed, the first contact of the ground detection relay is automatically disconnected, and the working current relay is closed, driving a large current to supply the working current to the working circuit side, and at the same time the power supply supplies power to the control circuit side, and the controller test fixture is controlled by the CAN communication module to perform a simulated aging test. The above technical solution selects the output of the power supply by selecting the circuit, and realizes the distinction between the current size of the ground detection power supply before the aging test and the working current power supply during the aging test, and has high reliability.

[0012] Preferably, the test system further comprises a prompt sound and light powered by the power supply, the prompt sound and light being connected in series with the second contact of the ground detection relay, and the second contact of the ground detection relay being a normally open contact.

[0013] By adopting the above technical solution, as long as the ground detection relay coil is energized, the warning sound and light will be in operation and alarm, indicating that the test circuit is charging the capacitor element of the controller under test or there is a ground fault. In either case, subsequent test operations using high operating current power supply cannot be performed.

[0014] Preferably, the working current relay is connected to the switching circuit, the switching circuit is connected to the power supply, and the switching circuit includes a third contact of the grounding detection relay and a first contact of the test tool relay connected in series. The third contact of the grounding detection relay is a normally closed contact, and the first contact of the test tool relay is a normally open contact. When the two are closed at the same time, the working current relay coil is turned on, so that the working current relay contacts are closed.

[0015] By adopting the above technical solution, the operating current relay is controlled by a switch circuit. As long as the ground detection relay coil is closed, the third contact of the normally closed ground detection relay is open. At this time, even if the first contact of the control test tool relay is closed, the operating current relay cannot be closed, which can prevent misoperation and improve reliability.

[0016] Preferably, the test system also 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.

[0017] By adopting the above technical solution, the opening and closing of the pneumatic solenoid valve and the test relay are linked and controlled. When the test relay is closed for start-up test, the start-up solenoid valve is automatically started to lock the controller test fixture.

[0018] Preferably, the test system further comprises a test host, which is connected to the CAN communication module signal, and the switch circuit is connected in series with a USB relay, to which the test host is connected.

[0019] By adopting the above technical solution, the control signal and test data of the CAN communication module can be received by the test host, and the test can be monitored, recorded and fed back. On the one hand, the USB relay realizes the control of the opening and closing of the switch circuit through the test host. On the other hand, the USB relay is linked to 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, isolated from the signal of the controller under test, and prevent miscontrol or controller program disorder due to misoperation.

[0020] Preferably, the test circuit also includes a positive control relay and a negative control relay connected to the switching circuit, and 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.

[0021] 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, and if negative power control is adopted, the negative control relay is enabled.

[0022] In a second aspect, the present application provides a controller testing tool for testing a controller to be tested, using the following technical solution:

[0023] The controller test fixture includes a controller fixing seat, a probe fixing frame, an insulating plate and a probe;

[0024] The controller fixing seat is a frame structure, and a plurality of connecting shafts are provided on one end surface of the controller fixing seat. 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 in the frame structure of the controller fixing seat;

[0025] The end surface of the controller fixing seat on the same side as the connecting shaft is provided with a pivot seat, and 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;

[0026] A probe window is provided on the probe fixing frame, an insulating plate connection hole is provided on the outside of the probe window, the insulating plate is connected and fixed to the probe fixing frame by a fastener, a probe connection hole is provided on the insulating plate, the probe connection hole is located within the range of the probe window, the probe is connected to the probe connection hole, and the probe passes through the probe window;

[0027] Before testing, the probe fixing frame is opened to provide installation space for the controller to be tested;

[0028] During testing, the probe fixing frame flips over, driving the insulating plate to cover the controller to be tested, and pressing the probe tightly against the wiring copper bus of the controller to be tested.

[0029] Through the above technical solution, a reversible probe fixing frame is adopted, which is convenient for disassembly, assembly and fixation of the controller to be tested when opened, and is convenient for grounding detection and grounding fault troubleshooting; when closed, it can drive the insulating plate equipped with the probe to cover the controller to be tested, so that the probe abuts the wiring copper bus of the controller to be tested, thereby realizing convenient and reliable installation, fixation and electrical connection of the controller to be tested.

[0030] Preferably, the controller fixing seat is provided with a pneumatic solenoid valve, which is located on the top surface on the opposite side of the pivot seat. When testing, the pneumatic solenoid valve locks the probe fixing frame in the testing position.

[0031] Preferably, the controller test fixture comprises a control module, the control module is provided with a ground detection button for controlling a ground detection relay, and is provided with a test fixture button for controlling a test fixture relay.

[0032] Through the above technical solution, the controller test fixture is adapted to the aging test system, which realizes the locking and fixation of the controller to be tested during the aging test, as well as the opening and selection of the grounding test and the aging test.

[0033] In a third aspect, the present application provides a controller testing method comprising the following steps:

[0034] S1, placing the controller to be tested on the controller test fixture;

[0035] S2, closes the ground detection relay, connects the controller test fixture and the ground detection circuit, charges the capacitor element in the controller test fixture through the power supply, and performs ground detection at the same time;

[0036] S3, after the charging time reaches the preset value, check whether 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, enter S4;

[0037] S4, the test host closes the USB relay, then closes the test fixture relay, starts the pneumatic solenoid valve to fix the controller test fixture, connects the controller test fixture to the working current circuit, the working current relay is attracted, and provides working current to the working circuit side of the controller test fixture. At the same time, the power supply supplies power to the control circuit side of the controller test fixture, starting the controller detection process;

[0038] S5, the test host automatically tests the controller item by item and displays the test results on the screen;

[0039] S6, after the test is completed, first disconnect the USB relay through the test host, then disconnect the test tooling relay, close the pneumatic solenoid valve, take out the controller to be tested, and the entire test process is completed.

[0040] In summary, this application includes at least one of the following beneficial technical effects:

[0041] 1. The burn-in test system of this application can switch between ground detection and burn-in testing. Before the burn-in test, the capacitor components of the controller under test are charged and ground detection is performed first, ensuring that low current charging is used to prevent circuit shock. When a high operating current is applied during the burn-in test, the controller under test that passes the ground detection will not suffer serious failures. This application simplifies the testing process and ensures the safety and reliability of the test.

[0042] 2. The working current relay of the present application is connected to the switch circuit, so that when the ground detection is in progress, even if the test button is pressed, the working current relay cannot be turned on, and a large current cannot be passed to the controller under test, thereby avoiding the risk of misoperation.

[0043] 3. This application can realize the on-off control of the test through the program of the test host, and monitor, record and feedback the test, which is convenient to operate; the test host links the start of the test with the start of the CAN communication module, realizing the automatic shutdown of the CAN communication module, thereby isolating it from the signal of the controller to be tested in the non-test state, preventing miscontrol or controller program disorder due to misoperation.

[0044] 4. This application is compatible with aging tests of controllers with positive and negative charge control.

[0045] 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 various functions of the above-mentioned aging test system. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a wiring diagram of a retarder controller aging test system in an embodiment of the present application;

[0047] Figure 2 This is a schematic diagram of the switch circuit wiring of a retarder controller aging test system in an embodiment of the present application;

[0048] Figure 3 This is an exploded view of a controller test fixture in an embodiment of the present application;

[0049] Figure 4 Schematic diagram of a flow chart of a retarder controller aging test method in an embodiment of the present application. DETAILED DESCRIPTION

[0050] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the present application, they are protected by patent law.

[0051] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. It should be noted that in the optional embodiments of the present application, when the embodiments in the present application are applied to specific products or technologies, the object information and other related data involved need to obtain the object's permission or consent, and the collection, use and processing of the relevant data need to comply with the relevant laws, regulations and standards of the relevant countries and regions. In other words, if the embodiments of the present application involve data related to the object, it needs to be obtained through the authorization and consent of the object, the authorization and consent of the relevant departments, and in compliance with the relevant laws, regulations and standards of the country and region. If personal information is involved in the embodiments, the acquisition of all personal information requires the consent of the individual. If sensitive information is involved, the separate consent of the information subject needs to be obtained. The embodiments also need to be implemented with the authorization and consent of the object.

[0052] The embodiments of the present application are described in further detail below with reference to the accompanying drawings.

[0053] Example 1:

[0054] See also 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.

[0055] Power supply 1 is a DC24V, 250A power supply, which is connected to selection circuit 2.

[0056] 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 the first contact K2-1 being a normally open contact. The circuit formed by the resistor and the first contact K2-1 is connected in parallel with the working current relay K1. The input of selection circuit 2 is connected to the output of power supply 1, and the output of selection circuit 2 is connected to test circuit 3. The function of the selection circuit is to select the test system mode, either ground detection mode or burn-in test mode.

[0057] Test circuit 3 includes a controller test fixture 31 and a load. The controller under test is housed within the controller test fixture 31. The controller test fixture 31 includes a working circuit side and a control circuit side. The working circuit side is used to input a high current into the working circuit of the controller under test, while the control circuit side is used to input a low current into the control circuit of the controller under test. The power supply terminal B+ on the working circuit side is connected to the output terminal of the selection circuit. The working circuit side is provided with output terminals matching the number of gears of the controller under test. Each output terminal is connected to a corresponding load and grounded. In this embodiment, the output terminals correspond to the four gears of the controller under test, namely P1, P2, P3, and P4, 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 has an unloaded terminal M- equipped with a freewheeling diode, which is grounded. During the grounding test, the controller under test is inoperative, and current is output from the unloaded terminal. The freewheeling diode generates a high-voltage reverse electromotive force when the circuit is opened or closed, or when the current suddenly changes, thereby providing a low-impedance discharge circuit to protect the switching components. The power supply terminal of the control circuit side is connected to the output terminal of the power supply 1, the signal pin of the control circuit side is connected to the CAN communication module 4, and the output terminal of the control circuit side is grounded. The CAN communication module 4 is powered by the power supply.

[0058] Before performing a burn-in test on the controller under test, a grounding test is performed. The operating current relay K1 is opened, and the first contact K2-1 of the grounding detection relay is manually closed. Power supply 1 supplies power to test circuit 3 through a current-limiting resistor and the first contact K2-1 of the grounding detection relay.

[0059] It should be noted that, since there are a large number of capacitive elements in the controller to be tested, the initial stage of ground detection is actually charging the capacitor. At this time, it is impossible to distinguish whether the controller to be tested is in a charging state or has 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 is fully charged and there is no ground fault in the controller to be tested. If the ground detection relay maintains a closed state for a long time and exceeds a preset time, it indicates that there is a ground fault in the controller to be tested, 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 to be tested, two 220 ohm, 6W resistors are used as the current limiting resistor in parallel.

[0060] Furthermore, the test system includes an audible and visual indicator light L0, powered by power supply 1. This indicator light L0 is connected in series with the second contact K2-2 of the ground detection relay, which is a normally open contact. As long as the ground detection relay is closed, the audible and visual indicator light activates and issues an alarm, indicating that the test circuit is charging the capacitive element of the controller under test or that a ground fault exists. In either case, subsequent test operations using high operating current cannot be performed.

[0061] After the controller under test passes the ground test, the ground detection relay automatically disconnects. At this point, the operating current relay K1 is closed, driving a high current to supply power to the working circuit of the controller under test. Simultaneously, power supply 1 supplies power to the control circuit of the controller under test. The control circuit receives control signals from the CAN communication module and sends test signals for each gear position to the CAN communication module.

[0062] 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 the gear position of any controller under test is tested, the corresponding load is connected and the corresponding load indicator light is lit, thereby identifying the current test gear position.

[0063] Example 2:

[0064] See also 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.

[0065] Switch circuit 5 includes a third contact K2-3 of a ground detection relay and a first contact K3-1 of a test fixture relay, connected in series. The third contact K2-3 of the ground detection relay is normally closed, while the first contact K3-1 of the test fixture relay is normally open. Simultaneously, the control circuit-side input of the controller test fixture 31 is connected to the third contact K3-3 of the test fixture relay, which is also normally open.

[0066] In the initial state, the first contact K3 - 1 of the test tool relay is open, the circuit where the coil of the working current relay K1 is located is open, and the working current relay K1 is disconnected.

[0067] During the grounding test, since the third contact K2-3 of the grounding detection relay is a normally closed contact, it automatically opens when the grounding detection relay is energized. At this time, regardless of whether the control test fixture relay is closed, the circuit where the coil of the working current relay K1 is located cannot be opened or closed. The working current relay K1 remains disconnected, and a large working current cannot be supplied 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 automatically releases, closing the normally closed contact of the third contact K2-3 of the grounding detection relay. At this time, the first contact K3-1 of the test fixture relay can be operated to close the working current relay K1, thereby supplying a large working current to the controller under test.

[0068] The burn-in test system further includes a pneumatic solenoid valve (SV) powered by the power supply. This valve is connected in series with the second contact (K3-2) of the test fixture relay and is a normally open contact. The valve is mounted on the controller test fixture. When the first contact (K3-1) of the test fixture relay is closed, the valve opens, locking the test fixture and ensuring that the controller does not move during the burn-in test.

[0069] 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 also closed, allowing power to be supplied to the control circuit of the controller under test, thus achieving on-off control of the control circuit in conjunction with the burn-in test.

[0070] Example 3:

[0071] See also Figure 2 On the basis of embodiment 2, the switch circuit 5 further includes a test host 6, which is connected to the CAN communication module 4. The test host 6 receives the control signal and test data from the CAN communication module 4, and monitors, records, and provides feedback on the aging test.

[0072] 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 button for controlling the USB relay K4 is included, and the start button is linked to the opening and closing of the CAN communication module 4.

[0073] The third contact K2-3 of the ground detection relay is closed in the initial state. If the tester mistakenly closes the first contact K3-1 of the test tool relay at this time, a large operating current will be passed to the controller under test without charging the capacitor and performing the ground detection, which will cause a safety hazard. Through the USB relay K4, the operator must first close the USB relay K4 on the operating host and confirm the start of the aging test before the large operating current can be supplied, thus avoiding the risk of misoperation. In addition, the opening and closing of the USB relay K4 is linked to the opening and closing of the CAN communication module 4, so that when the aging test is not being performed, the CAN communication module 4 is isolated from the signal of the controller under test, which is equivalent to isolating the signal of the entire vehicle, preventing the controller under test from being miscontrolled due to misoperation, causing program disorder in the controller under test, or the controller under test from interfering with the signal of the entire vehicle.

[0074] Example 4:

[0075] See also Figure 1Based on Example 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 fixture 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 allows manufacturers to freely choose between positive and negative control when performing burn-in tests on the controller. If positive control is used, the positive control relay K5 is activated, and if negative control is used, the negative control relay K6 is activated. Furthermore, 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. The indicators indicate whether positive or negative control is used.

[0076] Unless otherwise noted, pins not explicitly described in the circuit diagrams herein (e.g., power pin VCC, ground pin GND, enable pin EN, etc.) are connected in accordance with conventional methods known to those skilled in the art, and such connections do not constitute limitations on the technical solutions of the present invention. Passive components not shown in the diagrams, such as decoupling capacitors and pull-up / pull-down resistors, are connected in accordance with common electronic circuit design specifications (e.g., IEEE standards), and their specific parameters may be adjusted based on actual application scenarios.

[0077] Those skilled in the art will understand that Figure 1 and Figure 2 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the electronic device to which the solution of the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0078] Example 5:

[0079] See also Figure 3 A controller testing tool in an embodiment of the present application is used to perform an aging test on the controller to be tested, so as to realize the function of the retarder controller aging test system of the present application.

[0080] The controller test fixture includes a controller fixing seat 311 , a probe fixing frame 312 , an insulating plate 313 and a probe 314 .

[0081] The controller mount 311 is a frame structure with several connecting shafts 3111 positioned on one end. The controller under test 310 is provided with corresponding connection holes for these connecting shafts. The controller under test is fitted onto each connecting shaft and positioned within the frame structure of the controller mount 311. The upper portion of the controller under test 310 houses the working circuitry, equipped with a wiring busbar 3101. The lower portion houses the control circuitry, equipped with a junction box 3102 for mounting a circuit board and connecting signal cables to the CAN communication module.

[0082] It should be noted that, in practice, a single controller test fixture 31 can be configured with multiple controller mounts 311 arranged in an array. This allows for simultaneous mounting of multiple controllers 310 under test, enabling batch testing and further improving the efficiency of the burn-in test. Furthermore, the controller test fixture 31 can be equipped with wheels or other features for easy movement, allowing the controllers 310 under test to be moved into the high-temperature burn-in chamber for high-temperature burn-in testing.

[0083] A pivot seat 3112 is provided on the end surface of the controller fixing seat 311 on the same side as the connecting shaft 3111 . The probe fixing frame 312 is pivotally connected to the controller fixing seat 311 via the pivot seat 3112 and can cover the surface of the controller 310 to be tested.

[0084] The probe holder 312 has a probe window 3121, and an insulating plate connection hole 3122 is defined outside the probe window 3121. The insulating plate 313 is secured to the probe holder 312 via fasteners. A probe connection hole 3131 is defined in the insulating plate 313. This hole is located within the probe window 3121 and corresponds to the location of the copper busbar on the controller under test 310. A probe 314 is connected to the probe connection hole 3131, which passes through the probe window 3121.

[0085] Before testing, the probe holder 312 is opened to provide an installation space for the controller 310 to be tested.

[0086] During testing, the probe fixing frame 312 is turned over, driving the insulating plate 313 to cover the controller 310 under test, and pressing the probe 314 against the copper busbar of the controller 310 under test.

[0087] Furthermore, the controller mount 311 is equipped with a pneumatic solenoid valve (not shown), located on the top surface opposite the pivot mount 3112. During testing, the pneumatic solenoid valve locks the probe mount 312 in the test position, thereby limiting the displacement of the controller 310 under test and ensuring a tight connection between the probe and the copper busbar.

[0088] Furthermore, the controller test fixture includes a control module (not shown). The control module is equipped with a ground detection button for controlling the ground detection relay and a test fixture button for controlling the test fixture relay. The control module can be installed directly on the test fixture or connected to form a remotely movable control handle.

[0089] Example 6:

[0090] See also Figure 4A retarder controller aging test method according to an embodiment of the present application is used to perform an aging test on a controller to be tested, thereby realizing the function of the retarder controller aging test system of the present application. Specifically, the method comprises the following steps:

[0091] S1, placing the controller to be tested on the controller test fixture.

[0092] In step S2, press the ground detection button on the control module, closing the ground detection relay and connecting the controller test fixture to the ground detection circuit. This allows the power supply to charge the capacitor element in the controller test fixture while performing a ground detection. During the charging time, the warning light and sound signal can be ignored.

[0093] S3: After the charging time reaches the preset value, check whether the warning sound and light indicator still emits an alarm signal. In this embodiment, the preset charging time is 5 to 10 seconds. If the warning sound and light indicator still emits an alarm signal, remove the controller under test and search for the ground fault point. If the ground fault alarm is not present, the ground detection relay automatically disconnects and the process proceeds to S4.

[0094] In step S4, the test host closes the USB relay and turns on the CAN communication module, confirming that the aging test can begin. The test fixture button is then pressed, closing the test fixture relay and activating the pneumatic solenoid valve fixed controller test fixture. The working current relay closes, connecting the controller test fixture to the working current circuit, supplying working current to the working circuit side of the controller test fixture. Simultaneously, the power supply supplies power to the control circuit side of the controller test fixture, allowing the controller under test to be tested.

[0095] S5. Click the "Start Test" button on the test host screen. 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 displays the test results on the test host screen.

[0096] S6: After the test is completed, first disconnect the USB relay through the test host, then press the test tool button to disconnect the test tool relay, close the pneumatic solenoid valve, and remove the controller to be tested. At this point, the entire test process is completed.

[0097] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0098] As used in the above embodiments, the term “when” may be interpreted to mean “if” or “after” or “in response to determining that” or “in response to detecting that”, depending on the context. Similarly, the phrases “upon determining that” or “if (stated condition or event) is detected” may be interpreted to mean “if determining that” or “in response to determining that” or “upon detecting (stated condition or event)” or “in response to detecting (stated condition or event)”, depending on the context.

[0099] Unless otherwise defined, the technical or scientific terms used in this application shall have the usual meanings understood by persons of ordinary skill in the field to which this application belongs. The words "first", "second", "third" and similar terms used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one" or "a" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprises" cover the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0100] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

[0101] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A retarder controller aging test system, comprising a power supply and a test circuit, characterized in that: It also includes selection circuit and 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, and a circuit composed of 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 fixture and a load. The controller to be tested is installed in the controller test fixture. The controller test fixture 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 an output end that matches the number of gears of the controller to be tested. The output end is grounded through the load. The working circuit side is provided with an unloaded end equipped with a freewheeling diode, and the unloaded end is grounded. The power supply end of the control circuit side is connected to the output end of the power supply. The signal pin of the control circuit side is connected to the CAN communication module signal. The output end of the control circuit side is grounded. The CAN communication module is powered by the power supply; The working current relay is connected to the switch circuit, which 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 tool relay connected in series. The third contact of the ground detection relay is a normally closed contact, and the first contact of the test tool relay is a normally open contact. When the two are closed at the same time, the working current relay coil is turned on, so that the working current relay contacts are closed; The test system also includes a test host, which is connected to the CAN communication module signal. The switch circuit is connected in series with a USB relay, and the test host is connected to the USB relay.

2. A retarder controller aging test system according to claim 1, characterized in that: The test system also includes a prompt sound and light lamp powered by the power supply, the prompt 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.

3. The retarder controller aging test system according to claim 1, characterized in that: The test system also 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 tool relay, the second contact of the test tool relay is a normally open contact, and the pneumatic solenoid valve is arranged on the controller test tool.

4. The retarder controller aging test system according to claim 1, characterized in that: The test circuit also includes a positive control relay and a negative control relay connected to the switch circuit, and 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.

5. A controller testing method, characterized in that: The steps include: S1, placing the controller to be tested on the controller test fixture; S2, closes the ground detection relay, connects the controller test fixture and the ground detection circuit, charges the capacitor element in the controller test fixture through the power supply, and performs ground detection at the same time; S3, after the charging time reaches the preset value, check whether 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, enter S4; S4, the test host closes the USB relay, then closes the test fixture relay, starts the pneumatic solenoid valve to fix the controller test fixture, connects the controller test fixture to the working current circuit, the working current relay is attracted, and provides working current to the working circuit side of the controller test fixture. At the same time, the power supply supplies power to the control circuit side of the controller test fixture, starting the controller detection process; S5, the test host automatically tests the controller item by item and 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 tooling relay, close the pneumatic solenoid valve, take out the controller to be tested, and the entire test process is completed.

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