Clipping detector system

Abstract

The application provides a clipper detection system, which comprises a clipper and a detection unit; the clipper comprises a control chip and a power switch, and the control chip is electrically connected with the power switch and a voltage source respectively; the detection unit is electrically connected with the control chip, and is used for detecting whether the control chip and the power switch are faulty. Through the detection unit, whether the control chip and the power switch are faulty is detected, so that the structure of the clipper can be detected during the operation of the clipper, and the staff can be informed to repair as soon as possible, so that greater failure can be prevented, and the problem of high clipper failure rate in the prior art is solved.

Description

Technical Field

[0001] This application relates to the field of clipper technology, and more specifically, to a clipper detection system. Background Technology

[0002] When the drive system's engine drives the main generator, it provides excitation current to the generator, which then generates three-phase AC power. The main rectifier converts this AC power into DC power, which is then converted by the inverter to provide the electric wheel with an adjustable frequency AC power output. In actual operation, the DC bus voltage cannot exceed 1700V, as high voltage can easily burn out the inverter and contactors. Therefore, the main unit manufacturer incorporates a clipper into the DC bus system during design. The clipper discharges the high-voltage DC portion through a resistor grid, providing a stable DC power supply to the inverter. Because the clipper plays a crucial role in the drive system, and the compatibility of existing components is not perfect, the clipper failure rate has been increasing year by year.

[0003] Therefore, there is an urgent need for a clipper detection system. Summary of the Invention

[0004] The main objective of this application is to provide a clipper detection system to at least solve the problem of high clipper failure rate in existing solutions.

[0005] To achieve the above objectives, according to one aspect of this application, a clipper detection system is provided, the detection system including a clipper and a detection unit; the clipper includes a control chip and a power switch, the control chip being electrically connected to the power switch and a voltage source respectively; the detection unit is electrically connected to the control chip, the detection unit being used to detect whether the control chip and the power switch are malfunctioning.

[0006] Optionally, the control chip has multiple transmitting terminals, through which it transmits high-level or low-level signals. The detection unit includes multiple light-emitting diodes (LEDs), multiple transistors, and a microcontroller. The negative terminal of each LED is grounded. The emitter of each transistor is electrically connected to the positive terminal of one LED. The microcontroller has multiple receiving terminals and multiple transmitting terminals. Each receiving terminal of the microcontroller is electrically connected to a transmitting terminal of the control chip, and each transmitting terminal of the microcontroller is electrically connected to the base of one transistor. The microcontroller controls a portion of the LEDs to emit light based on the high-level or low-level signals transmitted by the transmitting terminals of the control chip, thereby indicating whether the control chip and the power switch have malfunctioned.

[0007] Optionally, the clipper detection system further includes a first voltage conversion module and a second voltage conversion module; the input terminals of the first voltage conversion module and the second voltage conversion module are respectively electrically connected to the voltage source, the output terminal of the first voltage conversion module is electrically connected to the power supply terminal of the microcontroller, and the output terminal of the second voltage conversion module is electrically connected to the power supply terminal of the control chip. The first voltage conversion module is used to convert the AC voltage of the voltage source into a first DC voltage to power the microcontroller, and the second voltage conversion module is used to convert the AC voltage of the voltage source into a second DC voltage to power the control chip.

[0008] Optionally, the detection unit further includes a relay having a first terminal, a second terminal, and a turn-off terminal. The turn-off terminal of the relay is electrically connected to the input terminal of the second voltage conversion module, the first terminal of the relay is electrically connected to the output terminal of the second voltage conversion module, and the second terminal of the relay is electrically connected to the power supply terminal of the control chip.

[0009] Optionally, the detection unit further includes a first light-emitting diode, and the control chip further includes a power supply voltage monitoring and transmitting terminal. The positive terminal of the first light-emitting diode is electrically connected to the power supply voltage monitoring and transmitting terminal of the control chip, and the negative terminal of the first light-emitting diode is electrically connected to the output terminal of the second voltage conversion module.

[0010] Optionally, the control chip further has a test terminal, and the detection unit further includes a voltage test module. The input terminal of the voltage test module is electrically connected to the voltage source, and the output terminal of the voltage test module is electrically connected to the test terminal of the control chip. The voltage test module is used to convert the AC voltage of the voltage source into a test voltage. When the test voltage is greater than a voltage threshold, the control chip controls the shut-off terminal of the relay to open.

[0011] Optionally, the detection unit further includes a current stabilization module and a current transformer. The current stabilization module is used to stabilize the current flowing through the power switch. The input terminal of the current stabilization module is electrically connected to the voltage source. The output terminal of the current stabilization module is electrically connected to the first terminal of the current transformer. The acquisition terminal of the current transformer is electrically connected to the current acquisition terminal of the control chip. The second terminal of the current transformer is electrically connected to the power switch.

[0012] Optionally, the detection unit further includes a second light-emitting diode (LED), the positive terminal of which is electrically connected to the power switch, and the negative terminal of which is grounded. When the power switch is in the ON state, the second LED emits light, and when the power switch is in the OFF state, the second LED does not emit light.

[0013] Optionally, the detection unit further includes an oscilloscope, which is electrically connected to the control chip. The oscilloscope is used to acquire the waveform of the control chip. If the waveform of the control chip is a predetermined erroneous waveform, the oscilloscope controls the control chip to stop working.

[0014] Optionally, the detection unit further includes a thermistor, and the control chip further has a first shutdown terminal and a second shutdown terminal. The first terminal of the thermistor is electrically connected to the first shutdown terminal of the control chip, and the second terminal of the thermistor is electrically connected to the second shutdown terminal of the control chip. When the temperature of the control chip at the current moment is greater than the temperature threshold of the thermistor, the thermistor is disconnected, so that the control chip stops working.

[0015] By applying the technical solution of this application, the detection unit detects whether the control chip and the power switch are faulty, thereby enabling the structure of the clipper to be detected during the operation of the clipper, so as to notify the staff to repair it as soon as possible and prevent larger failures, thus solving the problem of high failure rate of clippers in the existing solution. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 A first schematic diagram of a clipper detection system provided in an embodiment according to this application is shown;

[0018] Figure 2 A second schematic diagram of a clipper detection system provided in an embodiment of this application is shown.

[0019] The above figures include the following reference numerals:

[0020] 100. Detection Unit. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0024] As described in the background section, when the drive system's engine drives the main generator, it provides excitation current to the main generator, which then generates three-phase alternating current (AC). The main rectifier converts this AC to DC, and the inverter provides the DC inverter voltage and frequency-adjustable AC to the electric wheel for driving. In actual operation, the DC bus voltage cannot exceed 1700V. Since high voltage can easily burn out the inverter and contactors, the main unit manufacturer adds a clipper to the DC bus system during design. The clipper discharges the high-voltage DC portion through a resistor grid, providing a stable DC power supply to the inverter. Because the clipper plays a crucial role in the drive system, and the compatibility of existing components is insufficient, the clipper failure rate has been increasing year by year. To address the high failure rate of clippers in existing solutions, this application provides a clipper detection system.

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0026] This application provides a clipper detection system, such as Figure 1 and Figure 2As shown, the detection system includes a clipper and a detection unit 100; the clipper includes a control chip IC5 (the control chip is an integrated control board, the control board part number is 1700-16902) and a power switch Q5, the control chip IC5 being electrically connected to the power switch Q5 and the voltage source AC220 respectively; the detection unit 100 is electrically connected to the control chip IC5, and the detection unit 100 is used to detect whether the control chip IC5 and the power switch Q5 are faulty.

[0027] In the aforementioned detection system, the detection unit detects whether the control chip and the power switch are faulty, thereby enabling the structure of the clipper to be inspected during its operation. This allows the staff to be notified to repair it as soon as possible, preventing more serious failures and thus solving the problem of high clipper failure rate in existing solutions.

[0028] The analysis and recording of the input / output working principles of the clipper in the main circuit control system of the MT5500 truck, as well as the working principles of the internal components of the clipper module, provide positive guidance for the technical field of main circuit control systems for other truck models. The system independently programs a microcontroller to implement logic control operations, simulating the truck control environment, and accurately and quickly analyzes the clipper's operation. The MT5500 electric wheel truck clipper detection system detects and repairs damaged clippers, accurately identifies fault points, and quickly and efficiently repairs them. After repair, monitoring confirms no errors, achieving autonomous repair of the main component (clipper) in the main circuit control system of the MT5500 electric wheel truck.

[0029] In one embodiment of this application, such as Figure 1 and Figure 2As shown, the control chip IC5 has multiple transmitting terminals (A1, A2, A3, and A4, respectively). The control chip IC5 transmits high-level signals or low-level signals through its transmitting terminals. The detection unit 100 includes multiple light-emitting diodes (D6, D7, D8, and D9, respectively), multiple transistors (Q1, Q2, Q3, and Q4, respectively), and a microcontroller IC3 (MSP430-149). The negative terminal of each light-emitting diode is grounded; the emitter of each transistor is connected to one of the aforementioned... The positive terminal of the light-emitting diode is electrically connected; the microcontroller IC3 has multiple receiving terminals and multiple transmitting terminals. Each receiving terminal of the microcontroller IC3 is electrically connected to a transmitting terminal of the control chip IC5, and each transmitting terminal of the microcontroller IC3 is electrically connected to the base of the transistor. The microcontroller IC3 controls a portion of the light-emitting diodes to emit light according to the high-level or low-level signals sent by the transmitting terminals of the control chip IC5, so as to indicate whether the control chip IC5 and the power switch Q5 have malfunctioned.

[0030] Specifically, the microcontroller can be controlled using PLC, DSP, and other control units. R6, R7, R8, R9, R13, R42, R43, and R44 are all used for protection circuits. SW10 serves as the microcontroller's service button. The protection diode D2 provides a stable voltage to the microcontroller's output power supply circuit, preventing fluctuations in the output voltage from affecting the microcontroller's power supply voltage. Multiple polarized capacitors (C1, C2, C3, C4, C6, C8, C9, C7) serve as energy storage and filtering capacitors. Capacitor C5 is a filter capacitor. The specific connection method is as follows... Figure 1 and Figure 2 As shown.

[0031] In one embodiment of this application, such as Figure 1 and Figure 2 As shown, the clipper detection system further includes a first voltage conversion module T1 and a second voltage conversion module T2. The input terminals of the first voltage conversion module T1 and the second voltage conversion module T2 are electrically connected to the voltage source AC220, respectively. The output terminal of the first voltage conversion module T1 is electrically connected to the power supply terminal of the microcontroller IC3, and the output terminal of the second voltage conversion module T2 is electrically connected to the power supply terminal of the control chip IC5. The first voltage conversion module T1 is used to convert the AC voltage of the voltage source AC220 into a first DC voltage to power the microcontroller IC3, and the second voltage conversion module T2 is used to convert the AC voltage of the voltage source AC220 into a second DC voltage to power the control chip IC5.

[0032] Specifically, the detection system also includes IC1 and IC2, both of which are Zener transistors, model LM7805 and LM7824 respectively.

[0033] In one embodiment of this application, such as Figure 1 and Figure 2 As shown, the detection unit 100 further includes a relay, the relay p5 having a first terminal, a second terminal and a turn-off terminal SW2, the turn-off terminal SW2 of the relay p5 being electrically connected to the input terminal of the second voltage conversion module T2, the first terminal of the relay being electrically connected to the output terminal of the second voltage conversion module T2, and the second terminal of the relay being electrically connected to the power supply terminal of the control chip IC5.

[0034] In one embodiment of this application, such as Figure 1 and Figure 2 As shown, the detection unit 100 further includes a first light-emitting diode, and the control chip IC5 also has a power supply voltage monitoring and transmitting terminal. The positive terminal of the first light-emitting diode is electrically connected to the power supply voltage monitoring and transmitting terminal of the control chip IC5, and the negative terminal of the first light-emitting diode is electrically connected to the output terminal of the second voltage conversion module T2.

[0035] In one embodiment of this application, such as Figure 1 and Figure 2 As shown, the control chip IC5 also has a test terminal, and the detection unit 100 further includes a voltage test module. The input terminal of the voltage test module is electrically connected to the voltage source AC220, and the output terminal of the voltage test module is electrically connected to the test terminal of the control chip IC5. The voltage test module is used to convert the AC voltage of the voltage source AC220 into a test voltage. When the test voltage is greater than the voltage threshold, the control chip IC5 controls the shut-off terminal of the relay to open.

[0036] In one embodiment of this application, such as Figure 1 and Figure 2 As shown, the detection unit 100 further includes a current stabilization module T4 and a current transformer. The current stabilization module is used to stabilize the current flowing through the power switch Q5. The input terminal of the current stabilization module is electrically connected to the voltage source AC220. The output terminal of the current stabilization module is electrically connected to the first terminal of the current transformer. The acquisition terminal of the current transformer is electrically connected to the current acquisition terminal of the control chip IC5. The second terminal of the current transformer is electrically connected to the power switch Q5.

[0037] T1, T2, T3, and T4 are all AC-to-DC converter chips, all model D25XB80, providing DC5V, DC24V, DC0-30V (adjustable voltage), and DC310V respectively. The DC5V power supply powers the MSP430-149 microcontroller and oscilloscope IC4, the 24V power supply powers the control chip IC5, and the 310V power supply drives the power switch Q5 through the control chip IC5 to form a loop circuit.

[0038] In one embodiment of this application, such as Figure 1 and Figure 2 As shown, the detection unit 100 also includes a second light-emitting diode (LED) D11. The positive terminal of the second LED D11 is electrically connected to the power switch Q5, and the negative terminal of the second LED D11 is grounded. When the power switch Q5 is in the ON state, the second LED D11 emits light; when the power switch Q5 is in the OFF state, the second LED D11 does not emit light. The function of the third LED D5 is to indicate that the residual charge in C7 has not been completely discharged after the test, showing whether there is voltage in C7, thus ensuring safety. Resistor R3 is used to protect D5, resistor R2 is used to protect diode D3, the first Zener diode D4 is used for voltage regulation, inductor L5 is used to protect the circuit, and resistor R40 is used to protect switch SW3. The function of SW3 is mainly to discharge capacitor C7 after the test. The specific connection method is as follows: Figure 1 and Figure 2 As shown.

[0039] In one embodiment of this application, such as Figure 1 and Figure 2 As shown, the detection unit 100 also includes an oscilloscope IC4, which is electrically connected to the control chip IC5. The oscilloscope IC4 is used to acquire the waveform of the control chip IC5. If the waveform of the control chip IC5 is a predetermined erroneous waveform, the oscilloscope IC4 controls the control chip IC5 to stop working. When the oscilloscope displays a straight line, it indicates that the operation has stopped; when the oscilloscope displays a PWM waveform, it indicates normal operation.

[0040] In one embodiment of this application, such as Figure 1 and Figure 2As shown, the detection unit 100 further includes a thermistor VT1, and the control chip IC5 also has a first shutdown terminal and a second shutdown terminal. The first terminal of the thermistor VT1 is electrically connected to the first shutdown terminal of the control chip IC5, and the second terminal of the thermistor VT1 is electrically connected to the second shutdown terminal of the control chip IC5. When the temperature of the control chip IC5 at the current moment is greater than the temperature threshold of the thermistor VT1, the thermistor VT1 is disconnected, so that the control chip IC5 stops working.

[0041] Specifically, the sliding rheostat VR1 is an adjustable resistor. Resistor R20 is used to protect the sliding rheostat VR1. The fourth LED D10 is used when IC5 is working normally during static testing, A5 outputs a high potential, and D10 lights up normally. Resistor R34 is used to protect D10. L1, L2, and L3 are all transformers used to adjust the voltage of the voltage source. Resistor R1 is used to protect the sixth LED D1. The function of D1 is to indicate that the microcontroller power supply voltage is normal. The Zener diodes D20 and D30 are symmetrically set to prevent instantaneous high voltage from 220V AC and to protect the downstream power supply. Switch SW1 is the main power switch for the test platform. Push-button switch SW9 is a short-circuit protection switch. Fuse FU1 is used to prevent the detection system from burning out. The specific connection method is as follows: Figure 1 and Figure 2 As shown.

[0042] The test mode is divided into two parts: static test and dynamic test. The first step is to enter the static test mode. During static testing, a 24V DC power supply, a temperature signal, and a current transformer signal are provided to the clipper. When the input voltages F1 and F2 are below 24.1V, if the clipper is functioning normally during the static test, then A4 of the clipper will provide a high-potential signal, and A5 will have no voltage output signal. When the microcontroller receives the high-potential signal from A4, it processes the signal, and P0.0 will output, driving the LED Q1 to light up. This ensures that the waveform display on IC4 has no waveform output, and D7, D8, D9, D10, and D11 do not light up. If D7 lights up, the microcontroller's I0.1 and I0.3 simultaneously receive a high-level signal, indicating an abnormal current transformer signal from the clipper. First, check for cold solder joints at the current transformer terminals. If any are found, resolder them with a soldering iron. If the problem persists, replace the current transformer signal processing chip U14. If indicator light D8 is lit, the temperature signal receiving circuit of the clipper needs to be checked. If D11 is constantly lit, it indicates an abnormality in the clipper output drive. Because Q5 has no output signal when the voltages of F1 and F2 are not higher than 25.4V, D11 will not light up. In this case, the operator should check the clipper receiving bus voltage processing circuit and the electronic components connected to F1 and F2. These electronic components are soldered on the IC5 circuit board. Alternatively, check the IGBT drive circuit (i.e., Q5) for faults. Check the multiple additional transistors on the drive board. These additional transistors are Q9, Q10, Q11, Q12, Q13, Q14, Q15, Q16, and Q17. Q9, Q10, Q13, and Q14 are all FZT849, and Q11, Q12, Q15, Q16, and Q17 are all FZT949. Q9 to Q17 (the additional transistors) are only examples and are not listed in the standard specifications. Figure 1 and Figure 2 The static test section is now complete. It is used to inspect the additional transistors on the driver board, which helps to identify the cause of the fault.

[0043] In the dynamic testing section, a voltage signal is supplied to the clipper's voltage signal receiving terminal during dynamic testing, and VR1 is adjusted. When the voltage signal reaches 25.7V (the step-down ratio is reduced from 1575V to 25.7V), a normal clipper will operate normally, driving Q5 in a pulse manner. Q5 discharges to the DC bus at a high frequency, forming the D11 circuit, and the LED illuminates. When the voltage drops to 24.1V (1475V), the clipper stops working, and D11 (LED) turns off. If, during the clipper test, the input voltage exceeds 25.7V and the clipper still does not operate normally, or if the clipper does not stop working after the voltage drops to 24.1V after activation, then the DC bus voltage detection circuit of the clipper is faulty, and the operator should measure and analyze the voltage comparator on the clipper. After the clipper is activated, the microcontroller receives high-potential digital signals through I0.1 and I0.3. Following the program settings, this will cause D7 to light up, indicating a fault in the current transformer. The relevant circuitry of the clipper should be measured and repaired. Alternatively, after activating the clipper, if the microcontroller only receives the high-potential signal from I0.1 and not I0.3, D9 will light up, indicating that the clipper is not receiving a voltage feedback signal. In this case, the clipper's feedback voltage signal receiving circuit should be tested and repaired. If both static and dynamic tests on the clipper are normal, it indicates that the clipper is intact and can be directly put into operation. If either condition is not met, the clipper is faulty. Personnel should locate the corresponding fault point based on the indicator lights on the clipper's test module and repair it. The repaired clipper can then be put into operation again. This significantly improves maintenance efficiency and quality, fills the gap in independent maintenance and testing of clippers, increases equipment availability, and ensures normal production.

[0044] Utilizing digital communication technology ensures compatibility in testing. Employing a microcontroller as the control unit facilitates easier equipment control. All internal power supplies use isolated switching power supplies, guaranteeing safer and more stable operation. This revolutionizes traditional maintenance methods, enabling real-time, accurate testing and repair. It eliminates the previous limitation of simply replacing damaged clippers with new parts; now, clipper drive faults can be accurately and efficiently resolved, resulting in well-functioning clippers after repair. It also eliminates equipment downtime caused by delayed delivery of new clippers, enabling rapid testing and repair, significantly improving work efficiency. The device boasts high precision, small size, excellent insulation, and a high-strength enclosure.

[0045] It should be noted that the above electrical connection can be a direct electrical connection or an indirect electrical connection. A direct electrical connection means that two devices are directly connected, while an indirect electrical connection means that there are other devices such as capacitors and resistors connected between the connected A and B.

[0046] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0047] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0048] The clipper detection system of this application detects whether the control chip and the power switch are faulty through the detection unit. This allows the clipper to be inspected during operation, enabling staff to be notified to repair it as soon as possible to prevent more serious failures. This solves the problem of high clipper failure rate in existing solutions.

[0049] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A clipper detection system, characterized in that, include: A clipper includes a control chip and a power switch, wherein the control chip is electrically connected to the power switch and a voltage source respectively; A detection unit is electrically connected to the control chip, and the detection unit is used to detect whether the control chip and the power switch are malfunctioning. The control chip has multiple transmitting terminals, and the control chip transmits high-level signals or low-level signals through the transmitting terminals. The detection unit includes: Multiple light-emitting diodes, with the negative terminal of each light-emitting diode grounded; Multiple transistors, each of which has its emitter electrically connected to the positive terminal of a light-emitting diode; A microcontroller has multiple receiving terminals and multiple transmitting terminals. Each receiving terminal of the microcontroller is electrically connected to a transmitting terminal of a control chip, and each transmitting terminal of the microcontroller is electrically connected to the base of a transistor. The microcontroller controls a portion of the light-emitting diodes to emit light based on a high-level or low-level signal sent by each transmitting terminal of the control chip, thereby indicating whether the control chip and the power switch have malfunctioned.

2. The clipper detection system according to claim 1, characterized in that, The clipper detection system further includes a first voltage conversion module and a second voltage conversion module; the input terminals of the first voltage conversion module and the second voltage conversion module are respectively electrically connected to the voltage source, the output terminal of the first voltage conversion module is electrically connected to the power supply terminal of the microcontroller, and the output terminal of the second voltage conversion module is electrically connected to the power supply terminal of the control chip. The first voltage conversion module is used to convert the AC voltage of the voltage source into a first DC voltage to power the microcontroller, and the second voltage conversion module is used to convert the AC voltage of the voltage source into a second DC voltage to power the control chip.

3. The clipper detection system according to claim 2, characterized in that, The detection unit further includes a relay, which has a first terminal, a second terminal, and a turn-off terminal. The turn-off terminal of the relay is electrically connected to the input terminal of the second voltage conversion module, the first terminal of the relay is electrically connected to the output terminal of the second voltage conversion module, and the second terminal of the relay is electrically connected to the power supply terminal of the control chip.

4. The clipper detection system according to claim 2, characterized in that, The detection unit further includes a first light-emitting diode, and the control chip also has a power supply voltage monitoring and transmitting terminal. The positive terminal of the first light-emitting diode is electrically connected to the power supply voltage monitoring and transmitting terminal of the control chip, and the negative terminal of the first light-emitting diode is electrically connected to the output terminal of the second voltage conversion module.

5. The clipper detection system according to claim 3, characterized in that, The control chip also has a test terminal, and the detection unit further includes a voltage test module. The input terminal of the voltage test module is electrically connected to the voltage source, and the output terminal of the voltage test module is electrically connected to the test terminal of the control chip. The voltage test module is used to convert the AC voltage of the voltage source into a test voltage. When the test voltage is greater than the voltage threshold, the control chip controls the shut-off terminal of the relay to open.

6. The clipper detection system according to claim 1, characterized in that, The detection unit further includes a current stabilization module and a current transformer. The current stabilization module is used to stabilize the current flowing through the power switch. The input terminal of the current stabilization module is electrically connected to the voltage source. The output terminal of the current stabilization module is electrically connected to the first terminal of the current transformer. The acquisition terminal of the current transformer is electrically connected to the current acquisition terminal of the control chip. The second terminal of the current transformer is electrically connected to the power switch.

7. The clipper detection system according to claim 1, characterized in that, The detection unit further includes a second light-emitting diode (LED). The positive terminal of the second LED is electrically connected to the power switch, and the negative terminal of the second LED is grounded. When the power switch is in the ON state, the second LED emits light, and when the power switch is in the OFF state, the second LED does not emit light.

8. The clipper detection system according to any one of claims 1 to 7, characterized in that, The detection unit also includes an oscilloscope, which is electrically connected to the control chip. The oscilloscope is used to acquire the waveform of the control chip. If the waveform of the control chip is a predetermined erroneous waveform, the oscilloscope controls the control chip to stop working.

9. The clipper detection system according to any one of claims 1 to 7, characterized in that, The detection unit further includes a thermistor, and the control chip also has a first shutdown terminal and a second shutdown terminal. The first terminal of the thermistor is electrically connected to the first shutdown terminal of the control chip, and the second terminal of the thermistor is electrically connected to the second shutdown terminal of the control chip. When the temperature of the control chip at the current moment is greater than the temperature threshold of the thermistor, the thermistor is disconnected, so that the control chip stops working.

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