CN114326651A - TCU test system and method - Google Patents
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Abstract
The invention provides a TCU test system and a method, wherein the system comprises: the load box is used for respectively supplying power to the signal module and the TCU module and realizing signal transmission between the signal module and the TCU module; the signal module comprises a switch signal generator and a function signal generator which are respectively connected with the load box, the switch signal generator sends a key signal to the TCU module through the load box so that the TCU module enters a working state according to the key signal, and the function signal generator is used for controlling and adjusting an output signal of the TCU module so that the TCU load module executes corresponding action according to the output signal; the TCU load module receives an output signal issued by the TCU module through the load box and sends a state feedback signal to the load box after executing a corresponding action. The TCU test system provided by the invention can be used for maximally detecting the software and hardware functions of the TCU module, and has the advantages of low test cost and simplicity in operation.
Description
Technical Field
The invention relates to the technical field of TCU rack testing, in particular to a TCU testing system and a TCU testing method.
Background
With the rapid development of automobile electronic control and the application of computer and information technology, more and more electronic control technologies are applied to automobiles, and automobile electronic control systems have been developed rapidly. An automatic Transmission electronic Control Unit (Transmission Control Unit) is one of core Control systems of a vehicle equipped with an automatic Transmission.
The electronic control unit of the automatic transmission can process various sensor signals representing the current vehicle running state in the running process of the automobile, so that the intention of a driver is judged to control the current vehicle gear.
In the prior art, electronic components on a vehicle are gradually complicated, and the requirements of people on the quality and the comfort of the vehicle are higher and higher. The quality requirements faced by TCU modules are also increasing. The traditional TCU module rack test execution operation is relatively single, and the TCU module test rack needs to be built again for testing the function of one TCU module, so that the corresponding load system design does not have the maximized function of verifying the software and hardware of the TCU module, the test cost of the TCU module is high, and the test process is complicated.
Disclosure of Invention
Based on this, the invention aims to provide a TCU test system and a method thereof, so as to solve the problems of high test cost and complicated test process caused by single operation of the traditional TCU test bench.
According to the TCU test system provided by the invention, the TCU test system comprises a load box, and a signal module, a TCU module and a TCU load module which are connected with the load box, wherein:
the load box is used for respectively supplying power to the signal module and the TCU module and realizing signal transmission between the signal module and the TCU module;
the signal module comprises a switch signal generator and a function signal generator which are respectively connected with the load box, the switch signal generator sends a key signal to the TCU module through the load box so that the TCU module enters a working state according to the key signal, and the function signal generator is used for controlling and adjusting an output signal of the TCU module so that the TCU load module executes corresponding action according to the output signal;
the TCU load module receives an output signal issued by the TCU module through the load box and sends a state feedback signal to the load box after executing a corresponding action.
In summary, according to the TCU test system, the load box is arranged to respectively supply power to the signal module and the TCU module and is used for signal transmission between the signal module and the TCU module, the signal module is arranged to send a key signal to the TCU module to enable the TCU module to enter a working state, the functional signal generator in the signal module controls and continuously adjusts the output signal of the TCU module to enable the TCU load module receiving the output signal to continuously execute the action corresponding to the output signal, so as to test whether each function of the TCU module is normal, and simultaneously, after each corresponding action is executed by the TCU load module, a state feedback signal is sent to the load box to judge the test result of each function of the TCU module, so as to achieve the test process of comprehensively testing each function of the TCU module, without re-building a test bench of the TCU module for each function of the TCU module as in the conventional manner, the operation is simple, and the test cost is greatly reduced.
Furthermore, the load box comprises a power supply unit, and a signal transceiver unit and a signal processing unit which are respectively connected with the power supply unit, wherein the signal transceiver unit is used for receiving signals sent by the TCU module and the signal module, the signal transceiver unit is also connected with the signal processing unit, and the signal processing unit is respectively connected with the TCU module, the signal module and the TCU load module.
Furthermore, the TCU test system also comprises a power module and a CAN bus module, wherein the power module is used for supplying power to the load box, and the CAN bus module is used for network communication between the load box and the TCU module.
Furthermore, the TCU test system further comprises a state indication module for displaying the current corresponding functional state of the load box according to the received state feedback signal, and the state indication module further comprises a gear switch indication unit, a ramp switch indication unit, a clutch motor dummy load indication unit, a gear shifting motor dummy load indication unit and a gear selecting motor dummy load indication unit which are respectively connected with the load box.
Furthermore, the function signal generator comprises a position signal generator and a rotating speed signal generator, and the position signal generator and the rotating speed signal generator are both connected with the signal transceiver.
Further, the TCU load module includes a motor load unit and a motor dummy load unit respectively connected to the signal processing unit, and both the motor load unit and the motor dummy load unit are configured to execute corresponding actions according to the output signal issued by the TCU module.
Further, the motor load unit comprises a clutch motor, a gear shifting motor and a gear selecting motor, and the motor dummy load unit comprises a clutch motor dummy load unit, a gear shifting motor dummy load unit and a gear selecting motor dummy load unit.
Furthermore, signal module still includes fender position switch generator, ramp switch generator, fender position switch generator and ramp switch generator all with signal transceiver electricity is connected, fender position switch generator be used for the TCU module sends fender position control command, ramp switch generator be used for the TCU module sends the supplementary instruction of climbing.
Furthermore, the load box further comprises a resistance unit and a safety unit, the power module is electrically connected with the safety power supply, and the CAN bus module is electrically connected with the resistance unit.
The invention also provides a TCU test method, which is realized by a TCU test system and comprises the following steps:
starting a power supply module to start a load box to supply power to a TCU module and a signal module, and sending a key signal to the TCU module by a switch signal generator through the load box to enable the TCU module to enter a working state;
the position signal generator sends a signal to the TCU module through the load box so that the TCU module starts to send a control instruction;
the control instruction is input into the motor load unit or the motor dummy load unit through the load box so as to enable the motor load unit or the motor dummy load unit to execute the action corresponding to the current control instruction;
and after the motor load unit or the motor dummy load unit executes the corresponding action, sending a state feedback signal to the load box so as to judge whether the control instruction sent by the TCU module is finished.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a flowchart of a TCU test system according to a first embodiment of the present invention;
FIG. 2 is a flowchart of a TCU test system according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a TCU testing method according to a third embodiment of the present invention.
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a schematic structural diagram of a TCU test system in a first embodiment of the present invention is shown, the system includes a load box 11, and a signal module 12, a TCU module 13, and a TCU load module 14 connected to the load box 11, where:
the load box 11 includes a power supply unit 111 therein, the power supply unit 111 is electrically connected to the signal module 12 and the TCU module 13, respectively, to supply power to the signal module 12 and the TCU module 13, and the load box 11 is mainly used for implementing signal transmission between the signal module 12 and the TCU module 13, that is, the signal module 12 sends a relevant signal to the TCU module 13 through the load box 11, so as to control the TCU to send a corresponding control instruction.
Further, the signal module 12 includes a switch signal generator 121 respectively connected to the load box 11 and a plurality of different function signal generators, the switch signal generator 121 firstly sends a key signal to the load box 11, then the load box 11 forwards the key signal to the TCU module 13, the TCU module 13 controls itself to enter a working state according to the received key signal, in this embodiment, the key signal sent by the switch signal generator may be a voltage signal triggering the TCU module to work, or a CAN network message, the function generator is used to control and adjust an output signal of the TCU module 13, that is, the function generator sends a control signal to the TCU module 13 through the load box 11, so that the TCU module 13 adjusts the output signal according to different control signals, and is electrically connected to the load box 11 by setting a plurality of different function generators, thereby effectively realizing different output signals to the TCU module 13, the TCU module 13 sends output signals corresponding to various functions to the TCU load module 14, so that the TCU load module 14 executes corresponding actions according to the output signals, thereby implementing effective testing of various functions of the TCU module 13.
It should be noted that, no matter the TCU module 13 performs signal transmission with the signal module 12 or with the TCU load module 14, the signal transmission is performed through the load box 11, and after the TCU load module 14 performs a corresponding action according to the received output signal, the TCU load module 14 sends a corresponding status feedback signal to the load box 11, so that the load box 11 confirms whether the corresponding function of the TCU module 13 is normal.
In summary, according to the above TCU test system, the load box 11 is configured to supply power to the signal module 12 and the TCU module 13, and is used for signal transmission between the signal module 12 and the TCU module 13, the signal module 12 is configured to send a key signal to the TCU module 13, so that the TCU module 13 enters a working state, the function signal generator in the signal module 12 controls and continuously adjusts the output signal of the TCU module 13, so that the TCU load module 14 receiving the output signal can continuously execute the action corresponding to the output signal, thereby testing whether each function of the TCU module 13 is normal, and meanwhile, after each corresponding action is executed by the TCU load module 14, a state feedback signal is sent to the load box 11 to determine the test result of each function of the TCU, so as to achieve a test process for comprehensively testing each function of the TCU module 13, without re-building the test bench for each function of the TCU module 13 as in a conventional manner, the operation is simple, and the test cost is greatly reduced.
Referring to fig. 2, a schematic structural diagram of a TCU test system according to a second embodiment of the present invention is shown, in which the TCU test system in this embodiment is substantially the same as the first embodiment, except that:
the TCU test system further comprises a power module 15 and a CAN bus module, wherein the power module 15 is used for supplying power to the load box 11, the CAN bus module is used for the load box 11 and the network communication between the TCU modules 13, in the embodiment, the load box 11 comprises a power supply unit 111 and a signal transceiving unit 112 and a signal processing unit 113 which are respectively connected with the power supply unit 111, namely, the power supply unit 15 supplies power to the load box 11, and the power supply unit 111 in the load box 11 supplies power to each component device in the signal transceiving unit 112, the signal processing unit 113, the signal module 12 and each component device in the TCU module 13 respectively, so that the normal operation of the whole TCU test system is ensured.
It should be noted that, in this embodiment, the load box 11 further includes a resistance unit and a safety unit, the power module 15 is electrically connected to the safety power supply, the CAN bus module is electrically connected to the resistance unit, the CAN bus module may include one or more paths of CAN signals, and each CAN branch line is matched with a corresponding resistance unit to prevent the signals from being transmitted.
Further, the signal transceiver unit 112 is configured to receive a signal sent by the TCU module 13 or the signal module 12, the signal receiver unit is further connected to the signal processing unit 113 to send the signal to the signal processing module, and the signal processing unit 113 is respectively connected to the TCU module 13, the signal module 12, and the TCU load module 14, so that the signal processing module can determine a signal receiving party in time by analyzing the signal, thereby implementing signal transmission among the TCU module 13, the signal module 12, and the TCU load module 14.
Further, the function signal generator includes a position signal generator and a rotation speed signal generator 125, both of which are connected to the signal transceiver, in this embodiment, when the function of the TCU module 13 needs to be tested, the position signal generator or the rotation speed signal generator 125 sends an instruction to the load box 11 to adjust and control the output signal of the TCU module 13, so as to test various functions of the TCU module 13.
Specifically, the position signal generator mainly includes a gear selection position signal generator 122, a gear shift position signal generator 123 and a clutch position signal generator 124, the gear selection position signal generator 122 is configured to send a gear position signal to the TCU module 13, the gear shift position signal generator 123 is configured to send a gear shift position signal to the TCU module 13, the clutch position signal generator 124 is configured to send a clutch position signal to the TCU module 13, and the rotational speed signal generator 125 in the signal module 12 is configured to send an output power signal of the load motor to the TCU module 13.
In this embodiment, the gear selection position signal generator sends a gear signal to the TCU module to remind the TCU module that a gear shifting operation needs to be performed; the shift position signal generator is also a gear signal for sending to the TCU module the gear to which the target needs to be changed. The rotating speed signal generator comprises an input shaft signal generator and an output shaft signal generator, and the input shaft signal generator and the output shaft signal generator send two different speed signals.
Further, the signal module 12 further includes a gear switch generator 126 and a ramp switch generator 127, where the gear switch generator 126 and the ramp switch generator 127 are both electrically connected to the signal transceiver, the gear switch generator 126 is configured to send a gear control instruction to the TCU module 13, and the ramp switch generator 127 is configured to send a hill climbing auxiliary instruction to the TCU module 13, where in this embodiment, the gear switch generator is specifically a two-gear start switch and is configured to send a switch signal; the ramp switch generator is specifically a ramp auxiliary switch.
Further, the TCU load module 14 includes a motor load unit and a motor dummy load unit respectively connected to the signal processing unit 113, and after the TCU module 13 realizes signal transmission through the load box 11 and the signal module 12, it determines a function currently required to be tested, and then the TCU module 13 sends a control instruction to the TCU load module 14 through the load box 11, so that the motor load unit and the motor dummy load unit in the TCU load module 14 execute corresponding operations according to the control instruction.
It can be understood that, in this embodiment, the motor load unit includes a clutch motor, a shift motor, and a gear selection motor, respectively, and the motor dummy load unit includes a clutch motor dummy load unit, a shift motor dummy load unit, and a gear selection motor dummy load unit, it should be noted that, regardless of whether each component in the motor load unit or each component in the motor dummy load unit is electrically connected to the signal receiving unit in the load box 11, by providing various load motors and dummy load motors, the operation corresponding to the TCU function can be realized in a simulated manner.
It should be noted that the purpose of providing the motor dummy load unit is to effectively improve the test accuracy by controlling the operation of the motor dummy load unit at this time, because the operation of the motor load unit may affect the test result in some TCU test items.
Further, the TCU test system further includes a status indication module, which is configured to display a current corresponding functional status of the load box 11 according to the received status feedback signal, the state indicating module further comprises a gear switch indicating unit 161, a ramp switch indicating unit 162, a clutch motor dummy load indicating unit 163, a gear shifting motor dummy load indicating unit 164 and a gear selecting motor dummy load indicating unit 165 respectively connected with the load box 11, by arranging various indication units, the state condition of the TCU load module 14 after executing the corresponding action of the output signal sent by the TCU module 13 can be accurately judged, it should be noted that, after performing the corresponding action, the TCU load module 14 sends a status feedback command to the load box 11, so that the load box 11 controls the indication unit corresponding to the state feedback instruction in the state indication module to be opened, thereby facilitating the intuitive judgment of the tested result of the TCU module 13.
Specifically, in this embodiment, each indication unit is set as an indication lamp, and whether the corresponding load operation of the TCU load module is normal can be known by controlling the brightness of the indication lamp.
In summary, according to the above TCU test system, the load box 11 is configured to supply power to the signal module 12 and the TCU module 13, and is used for signal transmission between the signal module 12 and the TCU module 13, the signal module 12 is configured to send a key signal to the TCU module 13, so that the TCU module 13 enters a working state, the function signal generator in the signal module 12 controls and continuously adjusts the output signal of the TCU module 13, so that the TCU load module 14 receiving the output signal can continuously execute the action corresponding to the output signal, thereby testing whether each function of the TCU module 13 is normal, and meanwhile, after each corresponding action is executed by the TCU load module 14, a state feedback signal is sent to the load box 11 to determine the test result of each function of the TCU, so as to achieve a test process for comprehensively testing each function of the TCU module 13, without re-building the test bench for each function of the TCU module 13 as in a conventional manner, the operation is simple, and the test cost is greatly reduced.
Referring to fig. 3, a flowchart of a TCU testing method according to a third embodiment of the present invention is shown, where the method is implemented by a TCU testing system, and the method includes steps S01 to S04, where:
step S01: the power supply module 15 is started to start the load box 11 to supply power to the TCU module 13 and the signal module 12, and the switch signal generator 121 sends a key signal to the TCU module 13 through the load box 11 to enable the TCU module 13 to enter a working state;
it should be noted that, the power module 15 is turned on to start the operation of the TCU test system, and then the switching signal generator 121 controls the TCU module 13 to enter the working state, so as to test various functions of the TCU module 13.
Step S02: the position signal generator sends a signal to the TCU module 13 through the load box 11 so that the TCU module 13 starts to send a control instruction;
it can be understood that the position signal generator can control the output signal of the TCU module 13 through the load box 11, and the output signal is a control command for the TCU load module 14, and it should be noted that the position generator can send various signals, such as signals related to gear shifting, gear selecting, a clutch, and the like, so as to achieve the purpose of enabling the TCU module 13 to send different control commands, thereby achieving the purpose of testing various functions of the TCU module 13.
Step S03: a control instruction is input to the motor load unit or the motor dummy load unit through the load box 11, so that the motor load unit or the motor dummy load unit executes an action corresponding to the current control instruction;
it should be noted that the TCU module 13 sends a control command corresponding to the test function to the TCU load module 14 through the load box 11, so that each motor load unit and each motor dummy load unit in the TCU load module 14 execute the action related to the control command, thereby completing the test of the function related to the TCU module 13.
Step S04: after the motor load unit or the motor dummy load unit executes the corresponding action, a state feedback signal is sent to the load box 11 to judge whether the control instruction issued by the TCU module 13 is completed.
It should be noted that, in order to intuitively determine the execution status of the TCU load module 14, after the TCU load module 14 executes the relevant action, the TCU load module also sends a state feedback signal to the load box 11, and the load box 11 lights up the corresponding indication unit in the execution control indication module according to the state feedback, so that it can be effectively determined whether the control instruction issued by the TCU module 13 is completed, that is, whether the relevant function of the TCU module 13 is normal.
In summary, according to the above TCU test method, the load box 11 is configured to supply power to the signal module 12 and the TCU module 13, and is used for signal transmission between the signal module 12 and the TCU module 13, the signal module 12 is configured to send a key signal to the TCU module 13, so that the TCU module 13 enters a working state, the function signal generator in the signal module 12 controls and continuously adjusts the output signal of the TCU module 13, so that the TCU load module 14 receiving the output signal can continuously execute the action corresponding to the output signal, thereby testing whether each function of the TCU module 13 is normal, and at the same time, after each corresponding action is executed by the TCU load module 14, a state feedback signal is sent to the load box 11 to determine the test result of each function of the TCU, so as to achieve a test process for comprehensively testing each function of the TCU module 13, without re-building the test bench for each function of the TCU module 13 as in a conventional manner, the operation is simple, and the test cost is greatly reduced.
Those of skill in the art will understand that the logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be viewed as implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: a connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The TCU test system is characterized by comprising a load box, and a signal module, a TCU module and a TCU load module which are connected with the load box, wherein:
the load box is used for respectively supplying power to the signal module and the TCU module and realizing signal transmission between the signal module and the TCU module;
the signal module comprises a switch signal generator and a function signal generator which are respectively connected with the load box, the switch signal generator sends a key signal to the TCU module through the load box so that the TCU module enters a working state according to the key signal, and the function signal generator is used for controlling and adjusting an output signal of the TCU module so that the TCU load module executes corresponding action according to the output signal;
the TCU load module receives an output signal issued by the TCU module through the load box and sends a state feedback signal to the load box after executing a corresponding action.
2. The TCU test system of claim 1, wherein the load box comprises a power supply unit, and a signal transceiver unit and a signal processing unit respectively connected to the power supply unit, the signal transceiver unit is configured to receive signals sent by the TCU module and the signal module, the signal transceiver unit is further connected to the signal processing unit, and the signal processing unit is respectively connected to the TCU module, the signal module, and the TCU load module.
3. The TCU test system of claim 2, further comprising a power module for supplying power to the load box and a CAN bus module for network communication between the load box and the TCU module.
4. The TCU test system according to claim 2, further comprising a status indication module for displaying a current corresponding functional status of a load box according to the received status feedback signal, wherein the status indication module further comprises a gear switch indication unit, a ramp switch indication unit, a clutch motor dummy load indication unit, a shift motor dummy load indication unit and a gear selection motor dummy load indication unit respectively connected to the load box.
5. The TCU test system of claim 4, wherein the functional signal generator comprises a position signal generator and a speed signal generator, both of which are coupled to the signal transceiver.
6. The TCU test system of claim 2, wherein the TCU load module comprises a motor load unit and a motor dummy load unit respectively connected to the signal processing unit, and the motor load unit and the motor dummy load unit are both configured to perform corresponding actions according to the output signal issued by the TCU module.
7. The TCU test system of claim 6, wherein the motor load unit comprises a clutch motor, a shift motor, and a select gear motor, respectively, and the motor dummy load unit comprises a clutch motor dummy load unit, a shift motor dummy load unit, and a select gear motor dummy load unit.
8. The TCU testing system of claim 4, wherein the signal module further comprises a gear switch generator and a ramp switch generator, the gear switch generator and the ramp switch generator are electrically connected to the signal transceiver, the gear switch generator is configured to send a gear control command to the TCU module, and the ramp switch generator is configured to send a hill climbing assistance command to the TCU module.
9. The TCU test system of claim 3, wherein the load box further comprises a resistance unit and a arming unit, the power module is electrically connected to the arming power supply, and the CAN bus module is electrically connected to the resistance unit.
10. A TCU test method is realized by a TCU test system, and is characterized by comprising the following steps:
starting a power supply module to start a load box to supply power to a TCU module and a signal module, and sending a key signal to the TCU module by a switch signal generator through the load box to enable the TCU module to enter a working state;
the position signal generator sends a signal to the TCU module through the load box so that the TCU module starts to send a control instruction;
the control instruction is input into the motor load unit or the motor dummy load unit through the load box so as to enable the motor load unit or the motor dummy load unit to execute the action corresponding to the current control instruction;
and after the motor load unit or the motor dummy load unit executes the corresponding action, sending a state feedback signal to the load box so as to judge whether the control instruction sent by the TCU module is finished.
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