Detection device of motor system and detection method of motor system

Abstract

The invention discloses a detection device of a motor system and a detection method of the motor system. The detection device of the motor system comprises a communication module, an acquisition module and a main control module. The communication module is connected with the motor controller and the main control module, and the communication module is used for transmitting a first state parameter output by the motor controller to the main control module; the acquisition module is connected with the motor and is used for transmitting an acquired second state parameter output by the motor to the main control module; the main control module is used for comparing the first state parameter with the second state parameter under a first preset condition so as to determine the accuracy of signal transmission of the communication module and obtain an accuracy test result; the first preset condition includes that current of the motor is smaller than or equal to a first preset value. The detection device of the motor system provided by the invention can more accurately judge the test accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic circuits, and in particular to a detection device and a detection method for a motor system. Background Art

[0002] The detection device of the motor system is a device for detecting the various modules included in the motor system, and is widely used in the fields of motor research and development, manufacturing, and testing.

[0003] Currently, motor system testing equipment typically includes an industrial computer, communication hardware, and analog data acquisition equipment. The industrial computer compares and analyzes data measured by the communication hardware and the analog data acquisition equipment to determine the accuracy of the measurement results. However, this existing technology does not consider the operating status of the motor, resulting in poor measurement accuracy. Summary of the Invention

[0004] The present invention provides a detection device for a motor system and a detection method for a motor system, so as to solve the problem that the detection device for a motor system in the prior art has poor accuracy in determining measurement results.

[0005] According to one aspect of the present invention, there is provided a detection device for a motor system, comprising a communication module, an acquisition module and a main control module;

[0006] The communication module is connected to the motor controller and the main control module, and the communication module is used to transmit the first state parameter output by the motor controller to the main control module;

[0007] The acquisition module is connected to the motor, and is used to transmit the acquired second state parameter output by the motor to the main control module;

[0008] The main control module is used to compare the first state parameter with the second state parameter under a first preset condition to determine the accuracy of the signal transmitted by the communication module and obtain an accuracy test result; the first preset condition includes that the current of the motor is less than or equal to a first preset value.

[0009] Optionally, the detection device of the motor system also includes a sensing module, the sensing module is connected to the motor, the acquisition module is connected to the sensing module and the main control module, the sensing module is used to collect the second state parameter output by the motor, the second state parameter is an analog signal, the acquisition module is used to convert the collected analog signal into a digital signal, and transmit the digital signal to the main control module.

[0010] Optionally, the acquisition module includes an analog-to-digital conversion chip, a first connector, a first voltage divider unit, a first filtering unit, a second voltage divider unit and a second filtering unit; the first connector is connected to the sensing module, the first end of the first voltage divider unit is connected to the first connector, the second end of the first voltage divider unit is grounded, the output end of the first voltage divider unit is connected to the analog-to-digital conversion chip, the first end of the second voltage divider unit is connected to the first connector, the second end of the second voltage divider unit is grounded, the output end of the second voltage divider unit is connected to the analog-to-digital conversion chip, the first end of the first filtering unit is connected to the output end of the first voltage divider unit, the second end of the first filtering unit is grounded, the first end of the second filtering unit is connected to the output end of the second voltage divider unit, and the second end of the second filtering unit is grounded.

[0011] Optionally, the main control module includes a main control chip and a first interface, and the main control chip is connected to the vehicle power supply through the first interface.

[0012] Optionally, the main control chip includes a power output interface, the power output interface is connected to the acquisition module and the communication module, and the acquisition module and the communication module are powered by the main control chip.

[0013] Optionally, the main control module is also used to judge the connection fault status of at least two modules in the detection device of the motor system under a second preset condition based on the difference between the first state parameter and the second state parameter, and obtain a connection fault status result; the second preset condition includes that the current of the motor is greater than or equal to a second preset value, and the second preset value is greater than the first preset value; the detection device of the motor system also includes at least one first display module, the first display module is connected to the main control module, and the first display module is used to display the accuracy test result or the connection fault status result.

[0014] Optionally, the first display module includes a first display unit and a second display unit, and the first display unit and the second display unit are respectively connected to the main control module, the first display unit is used to display whether the accuracy test is passed or the connection is faulty, and the second display unit is used to display whether the accuracy test is failed or the connection is fault-free.

[0015] Optionally, the detection device of the motor system also includes a second display module, which is connected to the main control module. The second display module is used to display the test status of the main control module, and the test status includes a first test status and a second test status. The first test status is that the main control module detects that the current of the motor meets the first preset condition, and the second test status is that the main control module detects that the current of the motor meets the second preset condition.

[0016] According to another aspect of the present invention, a detection method for a motor system is provided, comprising:

[0017] receiving a first state parameter output by the motor controller and transmitted by a communication module;

[0018] receiving a second state parameter of the motor output acquired by an acquisition module;

[0019] Under a first preset condition, the first state parameter and the second state parameter are compared to determine the accuracy of the signal transmitted by the communication module and obtain an accuracy test result; the first preset condition includes that the current of the motor is less than or equal to a first preset value.

[0020] Optionally, the testing method also includes: under a second preset condition, judging the connection fault status of at least two modules in the detection device of the motor system based on the difference between the first state parameter and the second state parameter, and obtaining a connection fault status result; the second preset condition includes that the current of the motor is greater than or equal to a second preset value, and the second preset value is greater than the first preset value.

[0021] According to the technical solution of the embodiment of the present invention, the detection device of the motor system includes a communication module, an acquisition module and a main control module; the communication module is connected to the motor controller and the main control module, and the communication module is used to transmit the first state parameter output by the motor controller to the main control module; the acquisition module is connected to the motor, and the acquisition module is used to transmit the acquired second state parameter output by the motor to the main control module; the main control module is used to compare the first state parameter with the second state parameter under a first preset condition to determine the accuracy of the signal transmitted by the communication module and obtain an accuracy test result; the first preset condition includes that the current of the motor is less than or equal to the first preset value. By setting the first preset condition, the current of the motor is less than or equal to the first preset value, ensuring that the motor is in standby mode. At this time, the difference between the first state parameter and the second state parameter is less than or equal to the set difference, and it can be determined that the signal transmitted by the communication module is relatively accurate, thereby improving the accuracy of the judgment test accuracy. The technical solution of the present invention solves the problem of poor accuracy of the measurement result judgment of the detection device of the motor system in the prior art.

[0022] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 1 is a schematic structural diagram of a detection device for a motor system provided by an embodiment of the present invention;

[0025] Figure 2 is a structural diagram of another detection device for a motor system provided by an embodiment of the present invention;

[0026] Figure 3 This is a circuit of a detection device for a motor system provided by an embodiment of the present invention;

[0027] Figure 4 This is a flow chart of a detection method for a motor system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] An embodiment of the present invention provides a detection device for a motor system. Figure 1 FIG. 1 is a schematic diagram of a detection device for a motor system according to an embodiment of the present invention. Figure 1As shown, the detection device 100 of the motor system includes a communication module 110, an acquisition module 120 and a main control module 130; the communication module 110 is connected to the motor controller and the main control module 130, and the communication module 110 is used to transmit the first state parameter output by the motor controller to the main control module 130; the acquisition module 120 is connected to the motor, and the acquisition module 120 is used to transmit the collected second state parameter output by the motor to the main control module 130; the main control module 130 is used to compare the first state parameter with the second state parameter under a first preset condition to determine the accuracy of the signal transmitted by the communication module and obtain an accuracy test result; the first preset condition includes that the current of the motor is less than or equal to the first preset value.

[0031] In this embodiment of the present invention, the communication module 110 facilitates communication between the motor controller and the main control module. For example, the communication method is Controller Area Network (CAN), and the communication module 110 includes a CAN controller, a CAN bus, etc. The acquisition module 120 collects motor state parameters and includes an analog-to-digital converter, etc. The main control module 130 is a processing module that performs data storage, data calculations, and other operations. It is the core module of the motor system detection device and plays a key role in directing and coordinating the system's operation.

[0032] In an embodiment of the present invention, the communication module 110 transmits the first state parameter output by the motor controller to the main control module 130, and the acquisition module 120 acquires the second state parameter output by the motor. The first state parameter is the motor state parameter output by the motor controller, and the second state parameter is the actual operating state parameter of the motor. The main control module 130 obtains the current signal of the motor through the communication module 110 or the acquisition module 120. When the current signal of the motor meets the first preset condition, the main control module 130 compares the first state parameter with the second state parameter to determine the accuracy of the communication module transmission signal and obtains the accuracy test result. For example, the first state parameter and the second state parameter are both voltage signals, and the current of the motor meets the first preset condition, that is, the current of the motor is less than or equal to the first preset value. At this time, the motor is in a standby state. When the difference between the first state parameter and the second state parameter is less than or equal to the set difference, illustratively, the set difference is 0, that is, the first state parameter is equal to the second state parameter, and it can be determined that the accuracy of the communication module transmission signal is high.

[0033] In the technical solution of this embodiment, the detection device of the motor system includes a communication module, an acquisition module and a main control module; the communication module is connected to the motor controller and the main control module, and the communication module is used to transmit the first state parameter output by the motor controller to the main control module; the acquisition module is connected to the motor, and the acquisition module is used to transmit the acquired second state parameter output by the motor to the main control module; the main control module is used to compare the first state parameter with the second state parameter under a first preset condition to determine the accuracy of the signal transmitted by the communication module and obtain an accuracy test result; the first preset condition includes that the current of the motor is less than or equal to the first preset value. By setting the first preset condition, the current of the motor is less than or equal to the first preset value, ensuring that the motor is in standby mode. At this time, the difference between the first state parameter and the second state parameter is less than or equal to the set difference, and it can be determined that the signal transmitted by the communication module is relatively accurate, thereby improving the accuracy of the test accuracy. The technical solution of the present invention solves the problem of poor accuracy in the detection device of the motor system in the prior art in judging the measurement results.

[0034] Figure 2 FIG. 1 is a schematic structural diagram of another motor system detection device provided by an embodiment of the present invention. Figure 2 As shown, the detection device 100 of the motor system also includes a sensing module 210, which is connected to the motor. The acquisition module 120 is connected to the sensing module 210 and the main control module 130. The sensing module 210 is used to collect the second state parameter output by the motor, and the second state parameter is an analog signal. The acquisition module 120 is used to convert the collected analog signal into a digital signal and transmit the digital signal to the main control module 130.

[0035] In an embodiment of the present invention, the sensing module 210 is a module that converts the sensed physical quantity into an electrical signal by sensing or receiving the physical quantity to be measured. For example, the sensing module 210 includes components such as sensors. Based on the above embodiment, the communication module 110 transmits the first state parameter output by the motor controller to the main control module 130, the sensing module 210 outputs the second state parameter by sensing the operating state of the motor, and the acquisition module 120 acquires the second state parameter of the signal output by the sensing module 210 and converts the second state parameter into a corresponding digital signal. When the main control module 130 detects that the current signal of the motor meets the first preset condition, the main control module 130 compares the first state parameter with the second state parameter to determine the accuracy of the signal transmitted by the communication module and obtains an accuracy test result. For example, when the motor is in standby state, if the first state parameter is equal to the second state parameter, it can be determined that the accuracy of the signal transmitted by the communication module is high.

[0036] Figure 3 This is a circuit of a detection device for a motor system provided by an embodiment of the present invention, such as Figure 3As shown, the acquisition module 120 includes an analog-to-digital conversion chip U1, a first connector J1, a first voltage divider unit 121, a first filtering unit 122, a second voltage divider unit 123 and a second filtering unit 124; the first connector J1 is connected to the sensing module 210, the first end of the first voltage divider unit 123 is connected to the first connector J1, the second end of the first voltage divider unit 121 is grounded, the output end of the first voltage divider unit 121 is connected to the analog-to-digital conversion chip U1, the first end of the second voltage divider unit 123 is connected to the first connector J1, the second end of the second voltage divider unit 123 is grounded, the output end of the second voltage divider unit 123 is connected to the analog-to-digital conversion chip U1, the first end of the first filtering unit 122 is connected to the output end of the first voltage divider unit 123, the second end of the first filtering unit 122 is grounded, the first end of the second filtering unit 124 is connected to the output end of the second voltage divider unit 123, and the second end of the second filtering unit 124 is grounded.

[0037] In this embodiment of the present invention, the first voltage divider unit 121 includes a first resistor R1 and a second resistor R2, the first filtering unit 122 includes a first capacitor C1, the second voltage divider unit 123 includes a third resistor R3 and a fourth resistor R4, and the second filtering unit 124 includes a second capacitor C2. Based on the above embodiment, the signal output by the sensing module 210 can be a differential signal, which is input to the first and second voltage divider units 121 and 123 respectively via the first connector J1. The signal output by the first voltage divider unit 121 is transmitted to pin A0 of the analog-to-digital conversion chip U1, and the signal output by the second voltage divider unit 123 is transmitted to pin A2 of the analog-to-digital conversion chip U1. The analog-to-digital conversion chip U1 performs data calculations based on the received signal, performs analog-to-digital conversion, and outputs a digital signal, which is transmitted to the main control module 130 via pins SCL and SDA. The model of the analog-to-digital conversion chip U1 is ADS1115, and the analog-to-digital conversion chip U1 also includes pins VDD, GND, A1, and A3.

[0038] Continue to refer Figure 3 The main control module 130 includes a main control chip U2 and a first interface P1 , and the main control chip U2 is connected to the vehicle power supply through the first interface P1 .

[0039] In this embodiment of the present invention, the vehicle power supply is provided by a 12V vehicle battery. The main control chip U2 is a Mega2560, which features a wide voltage input capability. Therefore, the main control chip U2 can be powered by the vehicle's 12V battery, allowing the motor system detection device to be installed on the vehicle without requiring an external power source, enabling on-board operation.

[0040] Continue to refer Figure 3The main control chip U2 includes a power output interface P2, which is connected to the acquisition module 120 and the communication module 110. The acquisition module 120 and the communication module 110 are powered by the main control chip U2.

[0041] In this embodiment of the present invention, the main control chip U2 can convert the voltage of the vehicle power supply into the voltage V1 of the first power supply, where the voltage V1 of the first power supply is 5 V. The main control chip U2 outputs the first power supply through the power output interface P2 to power the communication module 110 and the acquisition module 120, making the power supply circuit relatively simple.

[0042] The main control module 130 also includes a reset switch S1, a ninth resistor R9, and a fourth light-emitting diode D4. The reset switch S1 is used to reset the main control chip U2, and the fourth light-emitting diode D4 illuminates when the main control chip U2 is reset. The main control chip U2 includes pins RESET, Vo, GND, VIN, 50, 51, 52, 53, SCL, SDA, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12. Pin Vo outputs a first power supply.

[0043] Specifically, the communication module 110 includes a communication chip U3 and an eighth resistor R8. The communication chip U3 is connected to the motor controller via the second interface J2. The communication chip U3 is also connected to the main control module 130. The communication chip U3 is used to transmit the first state parameter output by the motor controller to the main control module 130. The communication type of the communication chip can be CAN communication, local interconnect network communication (LIN), RS-485 communication, RS-232 communication, etc. For example, the model of the communication chip U3 is MCP2515, and the communication chip U3 is used for CAN communication. The communication chip U3 includes pins VCC, GND, CS, SO, SI, and SCK.

[0044] Based on the above embodiment, the main control module 130 is further configured to determine, under a second preset condition, the connection fault status of at least two modules in the motor system detection device based on the difference between the first state parameter and the second state parameter, and obtain a connection fault status result. The second preset condition includes the motor current being greater than or equal to a second preset value, and the second preset value being greater than the first preset value. The motor system detection device also includes at least one first display module 310, which is connected to the main control module 130 and is configured to display the accuracy test result or the connection fault status result.

[0045] In this embodiment of the present invention, the first display module 310 is a module that displays accuracy test results or fault status detection results. For example, the first display module 310 includes display elements such as indicator lights. Based on the above embodiment, the main control module 130, under a first preset condition, determines the accuracy of the signal transmitted by the communication module 110, and the first display module displays the accuracy test result. Under a second preset condition, the main control module determines the connection fault status of at least two modules in the motor system's detection device, and the first display module displays the connection fault status result.

[0046] Exemplarily, the motor system detection device includes five first display modules 310, which can respectively display five accuracy test results or five connection fault status results, thereby improving the reliability of the test results. The first display module 310 includes a first display unit 311 and a second display unit 312. The first display unit 311 and the second display unit 312 are respectively connected to the main control module 130. The first display unit 311 is used to display whether the accuracy test has passed or a connection fault has occurred, and the second display unit 312 is used to display whether the accuracy test has failed or the connection is normal.

[0047] In this embodiment of the present invention, the first display unit 311 includes a fifth resistor R5 and a first light-emitting diode D1, and the second display unit 312 includes a sixth resistor R6 and a second light-emitting diode D2. Exemplarily, under a first preset condition, the main control module 130 determines the accuracy of the signal transmitted by the communication module 110. If the accuracy test is satisfactory, the first light-emitting diode D1 in the first display unit 311 illuminates, while the second light-emitting diode D2 in the second display unit 312 does not illuminate. Conversely, if the accuracy test fails, the first light-emitting diode D1 does not illuminate, while the second light-emitting diode D2 illuminates. Under a second preset condition, the main control module 130 determines whether there is a connection fault between at least two modules in the motor system's detection device. If the connection is faulty, the first light-emitting diode D1 in the first display unit 311 does not illuminate, while the second light-emitting diode D2 in the second display unit 312 illuminates. Conversely, if the connection is normal, the first light-emitting diode D1 illuminates, while the second light-emitting diode D2 does not illuminate. The first light-emitting diode D1 illuminates green, while the second light-emitting diode D2 illuminates red. By displaying the test results simultaneously on the first display unit and the second display unit, the reliability of the test results can be improved, and the user can intuitively observe the measurement results.

[0048] Continue to refer Figure 3The detection device of the motor system also includes a second display module 320, which is connected to the main control module 130. The second display module 320 is used to display the test status of the main control module 130. The test status includes a first test status and a second test status. The first test status is that the main control module 130 detects that the current of the motor meets the first preset condition, and the second test status is that the main control module 130 detects that the current of the motor meets the second preset condition.

[0049] In this embodiment of the present invention, the second display module 320 is a module that displays the test status of the main control module 130. Specifically, the second display module 320 includes a seventh resistor R7 and a third light-emitting diode D3. For example, under a first preset condition, when the main control module 130 tests the accuracy of the signal transmitted by the communication module 110, the third light-emitting diode D3 illuminates. Under a second preset condition, when the main control module 130 tests the connection fault status of at least two modules in the motor system detection device, the third light-emitting diode D3 does not illuminate.

[0050] In this embodiment of the present invention, the communication module 110 transmits the first state parameter output by the motor controller to the main control module 130, and the acquisition module 120 acquires the second state parameter output by the motor. Under a first preset condition, the main control module 130 compares the first state parameter with the second state parameter to determine the accuracy of the communication module transmission signal and obtain an accuracy test result. Under a second preset condition, the main control module 130 determines the connection fault status of at least two modules in the motor system detection device based on the difference between the first state parameter and the second state parameter, and obtains a connection fault status result. By setting preset conditions and performing tests under different motor operating conditions, the reliability of the test results is improved. In addition, by selecting the main control chip, communication chip, and analog-to-digital conversion chip, and utilizing the high integration of these chips, the size of the integrated system can be reduced to less than 10cm*10cm*3cm, making the motor system detection device smaller and able to operate on the vehicle. For example, the motor system detection device can be used to measure a 48V mild hybrid motor for a vehicle.

[0051] The embodiment of the present invention also provides a detection method for a motor system. Figure 4 FIG. 1 is a flow chart of a detection method for a motor system provided by an embodiment of the present invention. Figure 4 As shown, the test methods include:

[0052] S10: Receive a first state parameter output by the motor controller and transmitted by the communication module.

[0053] S20: Receive a second state parameter of the motor output acquired by an acquisition module.

[0054] S30. Under a first preset condition, compare the first state parameter with the second state parameter to determine the accuracy of the signal transmitted by the communication module and obtain an accuracy test result; the first preset condition includes that the current of the motor is less than or equal to a first preset value.

[0055] Optionally, under a second preset condition, a connection fault state of at least two modules in the detection device of the motor system is determined based on a difference between the first state parameter and the second state parameter to obtain a connection fault state result. The second preset condition includes that the motor current is greater than or equal to a second preset value, and the second preset value is greater than the first preset value.

[0056] In an embodiment of the present invention, the communication module 110 transmits the first state parameter output by the motor controller to the main control module 130, and the acquisition module 120 acquires the second state parameter output by the motor. Under the first preset condition, the main control module 130 compares the first state parameter with the second state parameter to determine the accuracy of the signal transmitted by the communication module and obtain an accuracy test result. For example, the first preset value is 0, which ensures that the motor is in standby mode. At this time, when the first state parameter is equal to the second state parameter, the accuracy of the signal transmitted by the communication module can be determined, thereby improving the accuracy of the test accuracy. Under the second preset condition, the main control module 130 judges the connection fault state of at least two modules in the detection device of the motor system based on the difference between the first state parameter and the second state parameter, and obtains a connection fault state result. Detection of internal faults in the detection device of the motor system is realized.

[0057] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0058] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A detection device for a motor system, characterized in that: Including communication module, acquisition module and main control module; The communication module is connected to the motor controller and the main control module, and the communication module is used to transmit the first state parameter output by the motor controller to the main control module; The acquisition module is connected to the motor, and is used to transmit the acquired second state parameter output by the motor to the main control module; The main control module is used to compare the first state parameter with the second state parameter under a first preset condition to determine the accuracy of the signal transmitted by the communication module and obtain an accuracy test result; the first preset condition includes that the current of the motor is less than or equal to a first preset value.

2. The detection device of the motor system according to claim 1, characterized in that: It also includes a sensing module, which is connected to the motor, and the acquisition module is connected to the sensing module and the main control module. The sensing module is used to acquire the second state parameter output by the motor, and the second state parameter is an analog signal. The acquisition module is used to convert the acquired analog signal into a digital signal and transmit the digital signal to the main control module.

3. The detection device of the motor system according to claim 1 or 2, characterized in that: The acquisition module includes an analog-to-digital conversion chip, a first connector, a first voltage divider unit, a first filtering unit, a second voltage divider unit and a second filtering unit; The first connector is connected to the sensing module, the first end of the first voltage divider unit is connected to the first connector, the second end of the first voltage divider unit is grounded, the output end of the first voltage divider unit is connected to the analog-to-digital conversion chip, the first end of the second voltage divider unit is connected to the first connector, the second end of the second voltage divider unit is grounded, the output end of the second voltage divider unit is connected to the analog-to-digital conversion chip, the first end of the first filtering unit is connected to the output end of the first voltage divider unit, the second end of the first filtering unit is grounded, the first end of the second filtering unit is connected to the output end of the second voltage divider unit, and the second end of the second filtering unit is grounded.

4. The detection device for the motor system according to claim 1, characterized in that: The main control module includes a main control chip and a first interface, and the main control chip is connected to the vehicle power supply through the first interface.

5. The detection device for the motor system according to claim 4, characterized in that: The main control chip includes a power output interface, which is connected to the acquisition module and the communication module. The acquisition module and the communication module are powered by the main control chip.

6. The detection device for a motor system according to claim 1, characterized in that: The main control module is further configured to determine, under a second preset condition, a connection fault state of at least two modules in the detection device of the motor system based on a difference between the first state parameter and the second state parameter, and obtain a connection fault state result; the second preset condition including that the current of the motor is greater than or equal to a second preset value, and the second preset value is greater than the first preset value; The detection device for the motor system further includes at least one first display module, which is connected to the main control module and is used to display the accuracy test result or the connection fault status result.

7. The detection device for the motor system according to claim 6, characterized in that: The first display module includes a first display unit and a second display unit, and the first display unit and the second display unit are respectively connected to the main control module. The first display unit is used to display whether the accuracy test is passed or the connection is faulty, and the second display unit is used to display whether the accuracy test is failed or the connection is fault-free.

8. The detection device for the motor system according to claim 6, characterized in that: The detection device of the motor system also includes a second display module, which is connected to the main control module. The second display module is used to display the test status of the main control module. The test status includes a first test status and a second test status. The first test status is that the main control module detects that the current of the motor meets the first preset condition, and the second test status is that the main control module detects that the current of the motor meets the second preset condition.

9. A method for detecting a motor system, characterized in that: include: receiving a first state parameter output by the motor controller and transmitted by the communication module; receiving a second state parameter of the motor output acquired by the acquisition module; Under a first preset condition, the first state parameter and the second state parameter are compared to determine the accuracy of the signal transmitted by the communication module and obtain an accuracy test result; the first preset condition includes that the current of the motor is less than or equal to a first preset value.

10. The detection method of the motor system according to claim 9, characterized in that: Also includes: Under a second preset condition, based on the difference between the first state parameter and the second state parameter, the connection fault state of at least two modules in the detection device of the motor system is judged to obtain a connection fault state result; the second preset condition includes that the current of the motor is greater than or equal to a second preset value, and the second preset value is greater than the first preset value.

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