Dynamic aging test device of transmission control unit and aging test method thereof

Abstract

The embodiment of the invention discloses a dynamic aging test device of a transmission control unit and an aging test method thereof, the device comprises a monitoring device and an aging test box, the transmission control unit to be tested is arranged in the aging test box, the transmission control unit is connected with the monitoring device through a transition cable, and the monitoring device is connected with the aging test box. The aging test box is used for circularly updating the environmental conditions of the aging test of the transmission control unit; under each environmental condition, the monitoring device is used for providing a control signal for simulating vehicle operation for the transmission control unit, and monitoring and recording the operation state of the transmission control unit in the aging test box in real time until the aging test frequency of the transmission control unit reaches a preset frequency. By means of the mode, the operation state of the transmission control unit under different environmental stress can be accurately evaluated, faults occurring during field operation can be found in advance, and the faults are eliminated before leaving a factory.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of aging tests, and in particular to a dynamic aging test device of a transmission control unit and an aging test method thereof. Background Art

[0002] The transmission control unit is the core component of the traction inverter. Once a fault occurs, the traction inverter will be isolated and the EMU will lose the power unit of the vehicle. According to the analysis of the repair of the fault, the fault occurred after a period of operation, and no abnormalities were found in the conventional factory tests and routine tests. From the perspective of reliability, environmental stress screening (ESS) of the product can accelerate the exposure of potential internal faults and eliminate early defects of materials.

[0003] Traditional aging methods use static aging or power-on aging, that is, the object under test can be placed in an aging box for a period of time, and then taken out for routine tests at room temperature to verify whether the hardware is damaged, but it is impossible to accurately evaluate the operating status of the object under different environmental stresses at the time. Alternatively, the transmission control unit can be installed in the whole vehicle, and type tests (environmental stress tests) can also be carried out for screening, but the cost is high, the waste is large, and it involves products from multiple third-party companies. If a fault occurs, the test can only be suspended and the fault cannot be accurately located. Summary of the invention

[0004] In view of the above problems, an embodiment of the present invention provides a dynamic aging test device for a transmission control unit and an aging test method thereof, which overcome the above problems or at least partially solve the above problems.

[0005] According to one aspect of an embodiment of the present invention, a dynamic aging test device for a transmission control unit is provided, the device comprising: a monitoring device and an aging test chamber, the transmission control unit to be tested is arranged in the aging test chamber, the transmission control unit is connected to the monitoring device via a transition cable, and the aging test chamber is used for cyclically updating the environmental conditions of the aging test of the transmission control unit; under various environmental conditions, the monitoring device is used for providing a control signal simulating vehicle operation to the transmission control unit, and monitoring and recording the operating status of the transmission control unit in the aging test chamber in real time until the number of aging tests of the transmission control unit reaches a preset number.

[0006] Optionally, the monitoring device includes: a host computer, a signal transmission and acquisition module connected to the transmission control unit and the host computer, and a first adjustable power supply; the host computer controls the first adjustable power supply to provide power to the transmission control unit, and controls the signal transmission and acquisition module to transmit a control signal to the transmission control unit to start the transmission control unit, sends a first indication signal of "the monitoring working status is TRUE" to the transmission control unit, performs an internal input performance test on the transmission control unit, and records faults; after the transmission control unit is started, it outputs a pulse signal and an external power supply signal to the signal transmission and acquisition module, sends a second indication signal of "the TCU working status is TRUE" to the signal transmission and acquisition module, performs an external output performance test on the transmission control unit, and records faults.

[0007] Optionally, the control signal includes: a voltage analog signal, a current analog signal, a temperature signal, and a speed signal.

[0008] Optionally, when the transmission control unit receives the first indication signal of "the monitoring working status is TRUE", it detects whether the control signal is within the corresponding preset range. If it exceeds the corresponding preset range, it determines that the analog input of the transmission control unit is abnormal, and triggers a fault record; when the signal transmission and acquisition module receives the second indication signal of "the TCU working status is TRUE", it detects whether the pulse signal or the external power supply signal is within the corresponding preset range. If it exceeds the corresponding preset range, it determines that the analog output of the transmission control unit is abnormal, and triggers a fault record.

[0009] Optionally, the monitoring device also includes: a network communication module, which is connected to the transmission control unit via Ethernet and MVB; when the transmission control unit receives a first indication signal of "the monitoring working status is TRUE", it detects whether the Ethernet and MVB life signals sent by the network communication module are constantly changing; if the Ethernet and MVB life signals sent by the network communication module remain unchanged for a first preset time, it is determined that the communication output of the transmission control unit is abnormal, and a fault record is triggered; when the signal transmission and acquisition module receives a second indication signal of "the TCU working status is TRUE", it detects whether the Ethernet and MVB life signals sent by the transmission control unit are constantly changing; if the Ethernet and MVB life signals sent by the transmission control unit remain unchanged for a first preset time, it is determined that the internal communication input of the transmission control unit is abnormal, and a fault record is triggered.

[0010] Optionally, the host computer controls the first adjustable power supply to provide power to the transmission control unit in a cycle of low voltage → normal voltage → high voltage → power off, and the signal transmission and acquisition module monitors whether the external power supply signal output by the transmission control unit is within a corresponding preset range. If it exceeds the corresponding preset range, it is determined that the external power supply of the transmission control unit is abnormal and a fault record is triggered.

[0011] Optionally, the monitoring device also includes: a second adjustable power supply connected to the host computer and the transmission control unit, the host computer controlling the second adjustable power supply to cyclically provide power to the transmission control unit in the order of low voltage → normal voltage → high voltage → power off, the transmission control unit controlling the output port of the built-in DIO plug-in to output high and low level signals every second preset time, and returning them to the transmission control unit through the input port of the DIO plug-in, the transmission control unit determining whether the output digital quantity is consistent with the input digital quantity, and if not, determining that the DIO signal of the transmission control unit is abnormal, and triggering a fault record.

[0012] Optionally, the host computer is also connected to the transmission control unit via Ethernet, and after completing the aging test under any environmental conditions, the transmission control unit and the signal transmission and acquisition module upload the fault record to the host computer.

[0013] Based on the same inventive concept, an embodiment of the present invention also proposes a dynamic aging test method for a transmission control unit applied to the aforementioned dynamic aging test device for the transmission control unit, comprising: an aging test chamber cyclically updates the environmental conditions for the aging test of the transmission control unit; under each of the environmental conditions, the monitoring device provides a control signal simulating vehicle operation to the transmission control unit, performs an aging test on the transmission control unit, monitors and records the operating status of the transmission control unit in the aging test chamber; if the number of aging tests of the transmission control unit reaches a preset number, the aging test of the transmission control unit is stopped.

[0014] Optionally, the monitoring and recording of the operating status of the transmission control unit in the aging test chamber includes: the transmission control unit detects whether the control signal and life signal sent by the monitoring device are normal, and if there is an abnormality, a fault record is triggered; the monitoring device detects whether the life signal, pulse signal and external power supply signal sent by the transmission control unit are normal, and if there is an abnormality, a fault record is triggered.

[0015] The dynamic aging test device of the transmission control unit in the embodiment of the present invention comprises: a monitoring device and an aging test box, wherein the transmission control unit to be tested is arranged in the aging test box, the transmission control unit is connected to the monitoring device via a transition cable, and the aging test box is used to cyclically update the environmental conditions of the aging test of the transmission control unit; under various environmental conditions, the monitoring device is used to provide the transmission control unit with a control signal simulating vehicle operation, and to monitor and record the operating status of the transmission control unit in the aging test box in real time until the number of aging tests of the transmission control unit reaches a preset number, so as to accurately evaluate the operating status of the transmission control unit under different environmental stresses, discover faults occurring during on-site operation in advance, and eliminate the faults before leaving the factory.

[0016] The above description is only an overview of the technical solution of the embodiment of the present invention. In order to more clearly understand the technical means of the embodiment of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0018] Figure 1 A schematic structural diagram of a dynamic aging test device for a transmission control unit provided by an embodiment of the present invention is shown;

[0019] Figure 2 The figure shows the internal connection diagram of the dynamic aging test device of the transmission control unit provided by the embodiment of the present invention;

[0020] Figure 3 A schematic diagram of an aging test of a dynamic aging test device for a transmission control unit provided by an embodiment of the present invention is shown;

[0021] Figure 4 A schematic flow chart of a dynamic aging test method for a transmission control unit provided in an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0022] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0023] Figure 1 FIG. 2 shows a schematic diagram of the structure of a dynamic aging test device for a transmission control unit provided by an embodiment of the present invention. Figure 1 As shown, the dynamic aging test device of the transmission control unit includes: a monitoring device and an aging test box, the transmission control unit (TCU) to be tested is set in the aging test box, the transmission control unit is connected to the monitoring device through a transition cable, and the aging test box is used to cyclically update the environmental conditions of the aging test of the transmission control unit; under various environmental conditions, the monitoring device is used to provide the transmission control unit with a control signal simulating vehicle operation, and monitor and record the operating status of the transmission control unit in the aging test box in real time until the number of aging tests of the transmission control unit reaches a preset number. The preset number can be set as needed and is not specifically limited here.

[0024] In an embodiment of the present invention, the transmission control unit is the object to be tested, which is installed in an aging test chamber and connected to the monitoring device through a transition cable. The aging test chamber is used to provide different environmental stresses, including environmental factors such as temperature, vibration, humidity, and dust. As the core unit of the entire dynamic aging test, the monitoring device provides control signals that simulate vehicle operation, detects the output signals of the transmission control unit in real time, and monitors and records the operating status of the object to be tested in the aging test chamber. According to the test process, the monitoring device uses communication control to apply different environmental stresses to stimulate product failures.

[0025] like Figure 2 As shown, the monitoring device includes: a host computer, a signal transmission and acquisition module connected to the transmission control unit and the host computer, and a first adjustable power supply. The host computer controls the first adjustable power supply to provide power to the transmission control unit, and controls the signal transmission and acquisition module to transmit a control signal to the transmission control unit to start the transmission control unit, sends a first indication signal of "the monitoring working status is TRUE" to the transmission control unit, performs an internal input performance test on the transmission control unit, and records faults. Among them, the control signal includes: voltage analog signal, current analog signal, temperature signal, speed signal. The first adjustable power supply is Figure 2 The adjustable power supply 1 is preferably 110V.

[0026] In an embodiment of the present invention, the monitoring device further includes a power module for providing 110V power to other components in the monitoring device, such as a host computer, a signal transmission and acquisition module, etc. Before the host computer controls the first adjustable power supply to provide power to the transmission control unit, the power module supplies power to each component in the monitoring device, and the monitoring device is powered on and started.

[0027] After the transmission control unit is started, it outputs a pulse signal and an external power supply signal to the signal transmission and acquisition module, sends a second indication signal "TCU is in working status TRUE" to the signal transmission and acquisition module, performs an external output performance test on the transmission control unit, and records faults.

[0028] The test process can be that the monitoring device sequentially performs communication output judgment, analog output judgment and external power supply judgment, and the transmission control unit sequentially performs communication input judgment, analog input judgment and DIO monitoring. The following is a detailed introduction:

[0029] In the embodiment of the present invention, see Figure 2 , the monitoring device also includes: a network communication module, which is connected to the transmission control unit via Ethernet and MVB. When the transmission control unit receives the first indication signal of "the monitoring working status is TRUE", it detects whether the Ethernet and MVB life signals sent by the network communication module are constantly changing; if the Ethernet and MVB life signals sent by the network communication module remain unchanged for the first preset time, it is determined that the communication output of the transmission control unit is abnormal, and a fault record is triggered. When the signal transmission and acquisition module receives the second indication signal of "the TCU working status is TRUE", it detects whether the Ethernet and MVB life signals sent by the transmission control unit are constantly changing; if the Ethernet and MVB life signals sent by the transmission control unit remain unchanged for the first preset time, it is determined that the internal communication input of the transmission control unit is abnormal, and a fault record is triggered. Among them, the first preset time can be set as needed, and is not specifically limited here, and is preferably 2 seconds.

[0030] When the transmission control unit receives the first indication signal of "the monitoring working state is TRUE", it detects whether the control signal is within the corresponding preset range. If it exceeds the corresponding preset range, it determines that the analog input of the transmission control unit is abnormal and triggers a fault record. When the signal transmission and acquisition module receives the second indication signal of "the TCU working state is TRUE", it detects whether the pulse signal or the external power supply signal is within the corresponding preset range. If it exceeds the corresponding preset range, it determines that the analog output of the transmission control unit is abnormal and triggers a fault record.

[0031] Continue to see Figure 2 , the monitoring device also includes: a second adjustable power supply connected to the host computer and the transmission control unit, the host computer controls the second adjustable power supply to cyclically provide power to the transmission control unit in the order of low voltage (e.g. 77V) → normal voltage (e.g. 110V) → high voltage (e.g. 137V) → power off, the transmission control unit controls the output port of the built-in DIO plug-in to output 0 / 1 high and low level signals every second preset time, and returns to the transmission control unit through the input port of the DIO plug-in, the transmission control unit determines whether the output digital quantity is consistent with the input digital quantity, if not, it determines that the transmission control unit DIO signal is abnormal, and triggers a fault record. Among them, the first preset time can be set as needed, and is not specifically limited here, preferably 2 minutes. The duty cycle of the high and low level signals is preferably 0.5. The second adjustable power supply is Figure 2 The adjustable power supply 2 is preferably 110V.

[0032] The embodiment of the present invention also judges the external power supply signal of the transmission control unit. Optionally, the host computer controls the first adjustable power supply to cyclically provide power to the transmission control unit in the order of low voltage (e.g. 77V) → normal voltage (e.g. 110V) → high voltage (e.g. 137V) → power off, and the signal transmission and acquisition module monitors whether the external power supply signal output by the transmission control unit is within the corresponding preset range. If it exceeds the corresponding preset range, it is determined that the external power supply of the transmission control unit is abnormal, and a fault record is triggered. Among them, the external power supply signal can be a power supply signal of ±15V or ±24V.

[0033] In the embodiment of the present invention, Figure 3 As shown, the aging test process of the dynamic aging test device of the transmission control unit is as follows:

[0034] Step 101: Start the monitoring device.

[0035] The power module supplies power to each component in the monitoring device, and the monitoring device is powered on and started.

[0036] Step 102: Signal output given environmental stress is applied.

[0037] The host computer in the monitoring device controls the first adjustable power supply to provide power to the transmission control unit, and controls the signal transmission and acquisition module to transmit control signals (voltage analog signal, current analog signal, temperature signal, speed signal) to the transmission control unit.

[0038] Step 103: Wait until the TCU starts.

[0039] After the signal transmission and acquisition module transmits the control signal to the TCU, it waits for the transmission control unit (TCU) to start up.

[0040] If the TCU starts normally, execute step 105 and step 112. If the TCU starts abnormally, execute step 104.

[0041] Step 104: Trigger fault recording.

[0042] If the TCU starts abnormally, a fault record will be triggered.

[0043] Step 105: "TCU working status" is set to TRUE.

[0044] After the TCU is started, it starts to output external signals (pulse signals, external power supply signals), and sends a second indication signal that the TCU is in working state TRUE to the monitoring device, indicating that the TCU external output performance test can be started.

[0045] Step 106: Start TCU detection.

[0046] Step 107: Communication input monitoring.

[0047] When the working state of TCU is TURE, the monitoring device detects that the Ethernet and MVB life signals sent by TCU have been changing. When the life signal remains unchanged for 2 seconds, it is determined that the communication input is abnormal, and the process goes to step 110 to trigger the fault record.

[0048] Step 108: Analog input monitoring.

[0049] The output signals (voltage, current, temperature, speed) of the monitoring device are all given to the TCU. When the monitoring working state is TURE, the TCU detects whether the signal is within the defined range. If it is beyond the range, it is abnormal, and the process goes to step 110 to trigger the fault record.

[0050] Step 109: DIO monitoring.

[0051] The DIO plug-in is set inside the transmission control unit and connected to the outside through output points and input points. The detection of the DIO signal adopts a self-circulating method. The output point of the output signal of the DIO plug-in is connected to the input point of the DIO input signal. The common terminal voltage is powered by the second adjustable power supply. During the power-on period of the TCU, the monitoring device adjusts the DIO voltage range from low voltage (e.g. 77V) → normal voltage (e.g. 110V) → high voltage (e.g. 137V), and the cycle continues until the TCU is powered off.

[0052] TCU sets the DIO output port to output a 0 / 1 level that alternately flips every 2 minutes (duty cycle is 0.5), and returns to TCU through the DIO input port. TCU determines whether the output digital quantity is consistent with the input digital quantity. If the inconsistency lasts for a period of time, it is considered abnormal, and the process goes to step 110 to trigger the fault record.

[0053] Step 110: Trigger TCU recording.

[0054] During the TCU detection process, as long as a communication input fault, analog input fault or DIO monitoring fault occurs, the fault record will be triggered to record the existing fault condition and the environmental status at that time.

[0055] Step 111: Determine whether the time has come. If so, execute step 119, otherwise return to execute step 106.

[0056] If the detection time has not arrived, return to step 106 and continue TCU detection. If the detection time has arrived, execute step 119. The detection time refers to the time period of a TCU detection, that is, the detection period of an aging test of the transmission control unit.

[0057] Step 112: "Monitoring Working Status" is set to TRUE.

[0058] If the TCU starts normally, a first indication signal indicating that the monitoring working state is TRUE is sent to the TCU, indicating that the TCU internal input performance test can be started.

[0059] Step 113: Start monitoring device detection.

[0060] Step 114: Communication output monitoring.

[0061] When the monitoring working state is TURE, the Ethernet and MVB life signals sent by the TCU detection monitoring device have been changing. When the life signal remains unchanged for 2 seconds, it is abnormal, and the process goes to step 117 to trigger the fault record.

[0062] Step 115: Analog output monitoring.

[0063] After the monitoring device receives that the TCU has been in working state TURE, it detects whether the corresponding analog output signal is within a defined range. If it exceeds the range, it is abnormal, and the process goes to step 117 to trigger a fault record.

[0064] Step 116: External power supply monitoring.

[0065] The TCU power supply voltage is supplied by the first adjustable power supply. During the period when the TCU is powered on, the monitoring device adjusts the TCU input voltage range from low voltage (e.g. 77V) → normal voltage (e.g. 110V) → high voltage (e.g. 137V), and repeats this cycle until the TCU chassis is powered off. At the same time, the monitoring device monitors whether the power supply (±15V, ±24V) output by the TCU is within the range. If it is out of the range, it is abnormal, and go to step 117 to trigger the fault record.

[0066] Step 117: Trigger the monitoring device to record.

[0067] During the detection process of the monitoring device, as long as a communication output fault, an analog output fault or an external power supply monitoring fault occurs, a fault record will be triggered to record the existing fault condition and the environmental status at that time.

[0068] Step 118: Determine whether the time has come. If so, execute step 119, otherwise return to execute step 113.

[0069] If the detection time has not arrived, return to step 113 and continue to perform the monitoring device detection. If the detection time has arrived, execute step 119. The detection time refers to the time period of a monitoring device detection. The time period of the monitoring device detection is the same as the time period of the previous TCU detection.

[0070] Step 119: Determine whether the number of cycles has been reached. If yes, execute step 121, otherwise execute step 120.

[0071] Determine whether the number of aging tests of the transmission control unit reaches a preset number. If yes, execute step 121, otherwise execute step 120.

[0072] Step 120: The number of loops is increased by 1.

[0073] If the number of aging tests of the transmission control unit does not reach the preset number, the number of cycles is increased by 1, and then the process returns to step 102, and steps 102-119 are repeated to adjust the environmental test conditions of the transmission control unit and repeat the aging test of the transmission control unit in a cycle.

[0074] Step 121: Upload the fault record.

[0075] If the aging test times of the transmission control unit reach the preset times, the fault record is uploaded. The monitoring device transmits the acquired fault record to the host computer in the monitoring device, and the transmission control unit also uploads the acquired fault record to the host computer for storage and display.

[0076] Step 122: End.

[0077] The dynamic aging test device of the transmission control unit of the embodiment of the present invention applies different environmental stresses (including temperature, vibration, humidity, dust, etc.) through communication control during the power-on period of the TCU, and monitors the working state of the TCU under various different combinations of environmental stresses. If there is an abnormality, the environmental state at that time is recorded. By designing different transition cables, the same type of transmission control unit can be tested for ESS, and the dynamic aging test device can also be used to perform ESS tests by using other software and hardware solutions. The monitoring device provides a state signal simulating the operation of the vehicle by constructing a dynamic aging test device, and detects the operating state of the transmission control unit in the aging box in real time. It can detect faults that occur during on-site operation in advance and eliminate the faults before leaving the factory; it can carry out ESS aging screening for the company's own products (transmission control units), and can accurately evaluate the operating state of the tested object under different environmental stresses at that time. The screening cost is low, and the fault can be quickly and accurately located. The entire dynamic aging test device adopts one-button operation and is unattended. When a fault occurs, an alarm prompt is triggered to notify the tester to handle it, and a state table is automatically generated to facilitate fault troubleshooting.

[0078] In summary, the dynamic aging test device of the transmission control unit in the embodiment of the present invention includes: a monitoring device and an aging test box, the transmission control unit to be tested is arranged in the aging test box, the transmission control unit is connected to the monitoring device through a transition cable, and the aging test box is used to cyclically update the environmental conditions of the aging test of the transmission control unit; under various environmental conditions, the monitoring device is used to provide a control signal simulating vehicle operation to the transmission control unit, and monitor and record the operating status of the transmission control unit in the aging test box in real time until the number of aging tests of the transmission control unit reaches a preset number, which can accurately evaluate the operating status of the transmission control unit under different environmental stresses, can detect faults occurring during on-site operation in advance, and eliminate the faults before leaving the factory.

[0079] For the convenience of description, the above device is described as various modules according to their functions. Of course, when implementing the embodiment of the present invention, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0080] Based on the same concept, an embodiment of the present invention also provides a dynamic aging test method for a transmission control unit.

[0081] Attached Figure 4 As shown, the dynamic aging test method of the transmission control unit includes:

[0082] Step S11: The aging test box cyclically updates the environmental conditions of the transmission control unit aging test.

[0083] Step S12: Under each of the environmental conditions, the monitoring device provides a control signal simulating vehicle operation to the transmission control unit, performs an aging test on the transmission control unit, and monitors and records the operating status of the transmission control unit in the aging test box.

[0084] When the transmission control unit is subjected to an aging test, the transmission control unit detects whether the control signal and life signal sent by the monitoring device are normal. If there is an abnormality, a fault record is triggered; the monitoring device detects whether the life signal, pulse signal and external power supply signal sent by the transmission control unit are normal. If there is an abnormality, a fault record is triggered. For more specific processes, please refer to the aforementioned device embodiment, which will not be described in detail here.

[0085] Step S13: If the number of aging tests of the transmission control unit reaches a preset number, the aging test of the transmission control unit is stopped.

[0086] The above specific embodiments of the present invention are described. In some cases, the actions or steps recorded in the embodiments of the present invention can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the process depicted in the accompanying drawings does not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0087] The method of the above embodiment is applied to the corresponding device in the above embodiment, and has the beneficial effects of the corresponding device embodiment, which will not be described in detail here.

[0088] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure is limited to these examples. Based on the concept of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0089] This application is intended to cover all such substitutions, modifications and variations that fall within the broad scope of all embodiments. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the scope of protection of this disclosure.

Claims

1. A dynamic aging test device for a transmission control unit, characterized in that: The dynamic aging test device of the transmission control unit includes: a monitoring device and an aging test box, the transmission control unit to be tested is arranged in the aging test box, the transmission control unit is connected to the monitoring device through a transition cable, and the aging test box is used to cyclically update the environmental conditions of the aging test of the transmission control unit; under various environmental conditions, the monitoring device is used to provide the transmission control unit with a control signal simulating vehicle operation, and monitor and record the operating status of the transmission control unit in the aging test box in real time until the number of aging tests of the transmission control unit reaches a preset number.

2. The device according to claim 1, characterized in that The monitoring device comprises: a host computer, a signal transmission and acquisition module connected to the transmission control unit and the host computer, and a first adjustable power supply; The host computer controls the first adjustable power supply to provide power to the transmission control unit, controls the signal transmission and acquisition module to transmit a control signal to the transmission control unit to start the transmission control unit, sends a first indication signal of "the monitoring working state is TRUE" to the transmission control unit, performs an internal input performance test on the transmission control unit, and records faults; After the transmission control unit is started, it outputs a pulse signal and an external power supply signal to the signal transmission and acquisition module, sends a second indication signal of "TCU is in working state as TRUE" to the signal transmission and acquisition module, performs an external output performance test on the transmission control unit, and records faults.

3. The device according to claim 1 or 2, characterized in that: The control signal includes: a voltage analog signal, a current analog signal, a temperature signal, and a speed signal.

4. The device according to claim 2, characterized in that When the transmission control unit receives the first indication signal of "the monitoring working state is TRUE", it detects whether the control signal is within the corresponding preset range. If it exceeds the corresponding preset range, it determines that the analog input of the transmission control unit is abnormal and triggers a fault record; When the signal transmission and acquisition module receives the second indication signal of "TCU is in working state as TRUE", it detects whether the pulse signal or the external power supply signal is within the corresponding preset range. If it exceeds the corresponding preset range, it determines that the analog output of the transmission control unit is abnormal and triggers a fault record.

5. The device according to claim 2, characterized in that The monitoring device further comprises: a network communication module, the network communication module being connected to the transmission control unit via Ethernet and MVB; When the transmission control unit receives the first indication signal of "the monitoring working state is TRUE", it detects whether the Ethernet and MVB life signals sent by the network communication module have been changing; if the Ethernet and MVB life signals sent by the network communication module remain unchanged for a first preset time, it is determined that the communication output of the transmission control unit is abnormal, and a fault record is triggered; When the signal transmission and acquisition module receives the second indication signal of "TCU is in working state as TRUE", it detects whether the Ethernet and MVB life signals sent by the transmission control unit are constantly changing; if the Ethernet and MVB life signals sent by the transmission control unit remain unchanged for a first preset time, it is determined that the internal communication input of the transmission control unit is abnormal, and a fault record is triggered.

6. The device according to claim 2, characterized in that The host computer controls the first adjustable power supply to provide power to the transmission control unit in a cycle in the order of low voltage → normal voltage → high voltage → power off. The signal transmission and acquisition module monitors whether the external power supply signal output by the transmission control unit is within the corresponding preset range. If it exceeds the corresponding preset range, it is determined that the external power supply of the transmission control unit is abnormal and a fault record is triggered.

7. The device according to claim 2, characterized in that The monitoring device further comprises: a second adjustable power supply connected to the host computer and the transmission control unit, The host computer controls the second adjustable power supply to cyclically provide power to the transmission control unit in the order of low voltage → normal voltage → high voltage → power off. The transmission control unit controls the output port of the built-in DIO plug-in to output high and low level signals every second preset time, and returns them to the transmission control unit through the input port of the DIO plug-in. The transmission control unit determines whether the output digital quantity is consistent with the input digital quantity. If not, it determines that the DIO signal of the transmission control unit is abnormal, and triggers a fault record.

8. The device according to claim 2, characterized in that: The host computer is also connected to the transmission control unit via Ethernet. After completing the aging test under any environmental conditions, the transmission control unit and the signal transmission and acquisition module upload the fault record to the host computer.

9. A dynamic aging test method for a transmission control unit applied to a dynamic aging test device for a transmission control unit as claimed in any one of claims 1 to 8, characterized in that: The dynamic aging test method of the transmission control unit includes: The aging test chamber cyclically updates the environmental conditions for the aging test of the transmission control unit; Under each of the environmental conditions, the monitoring device provides a control signal simulating vehicle operation to the transmission control unit, performs an aging test on the transmission control unit, and monitors and records the operating status of the transmission control unit in the aging test chamber; If the number of aging tests of the transmission control unit reaches a preset number, the aging test of the transmission control unit is stopped.

10. The method according to claim 9, characterized in that: The monitoring and recording of the operating status of the transmission control unit in the aging test chamber includes: The transmission control unit detects whether the control signal and life signal sent by the monitoring device are normal, and triggers a fault record if there is an abnormality; The monitoring device detects whether the life signal, pulse signal and external power supply signal sent by the transmission control unit are normal. If there is an abnormality, a fault record is triggered.

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