Short circuit detection method capable of preventing misjudgment and implementation device

Abstract

The invention provides an anti-misjudgment short circuit detection method and an implementation device, which are used for solving the technical problem that the accurate judgment of the existing short circuit detection method can be influenced by the switching of main and standby power of industrial alarm control related devices, the fluctuation of field power supply voltage and the like. According to the invention, information of delay detection time, a post-stage circuit state, post-stage circuit continuous short circuit times, a post-stage circuit detection period and a main power supply state is collected; accurate judgment and processing of short circuit are realized through cooperative detection of parameters of delay detection time, post-stage circuit states, post-stage circuit continuous short circuit times and post-stage circuit detection periods in different main power supply states, so that main power, standby power and other voltage fluctuations are effectively filtered. According to the invention, the short circuit condition of a part of circuits to be judged can be accurately judged, and the on-site personal and property safety can be protected through emergency modes such as power failure of post-stage equipment and transmission of abnormal information to a platform in time.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial alarm control related devices, and in particular to a short circuit detection method and an implementation device for preventing misjudgment. Background Art

[0002] With the development of electronic instruments and meters, their safety has attracted much attention while they are widely used. In particular, the reliability of industrial instruments and meters is directly related to personal and property safety. The accuracy of short-circuit detection of industrial instruments and meters is directly related to whether emergency measures can effectively deal with on-site problems. However, due to the misjudgment caused by some operations of the instrument itself, the complex power supply environment on site will also bring difficulties to short-circuit detection. For example, the switching of the main and standby power supply of industrial alarm control related devices and the fluctuation of on-site power supply voltage will affect the accurate judgment of short-circuit detection.

[0003] Existing short-circuit detection and shutdown methods mostly use hardware to set threshold limits, such as fuses, MOS tube circuits, etc. Although this solution is simple to implement, it lacks flexibility and is prone to misjudging certain special situations such as power supply voltage fluctuations, causing the equipment to shut down inadvertently.

[0004] The invention patent with application number 202011101518.6 discloses a detection method for DC short-circuit fault of MMC-HVDC based on transient energy. A vector is constructed according to the transient energy of the bridge arm capacitance and DC inductance of MMC-HVDC, and fault judgment is performed according to the change of transient energy vector: when the change of transient energy vector exceeds the threshold, detection is started; when the interval positioning criterion is greater than the set value, the fault is judged to occur in the area, otherwise it is outside the area; for the sending end station, when the fault line selection criterion of a certain line is greater than the set value, the line is judged to have a fault, otherwise there is no fault; when the DC short-circuit fault identification criterion of the line is greater than the set value, a DC short-circuit fault is judged to have occurred, otherwise it is a power fluctuation or lightning fault; for the receiving end station, the situation is the opposite to that of the sending end station. The above invention can detect the fault within 1ms or even shorter time after the fault occurs and determine the location of the fault. However, the above invention has limitations. The detection method is mainly used for fault diagnosis of DC power grids and is not applicable to conventional industrial instruments. First, the hardware on which the transient energy construction theory described therein relies is not universal. Second, the parameter values ​​required in the detection method are highly correlated and cannot be flexibly applied to other fields or equipment. Summary of the invention

[0005] In order to solve the technical problem that the switching of main and standby power and the fluctuation of on-site power supply voltage will affect the accurate judgment of the existing short-circuit detection method, the present invention proposes a short-circuit detection method and implementation device that can prevent misjudgment, which fully considers the voltage fluctuations caused by various power supplies of the equipment and the on-site environment, filters out various fluctuations through software, accurately judges the short-circuit situation of the circuit to be judged, and protects the personal and property safety of the site in time through emergency measures such as powering off the subsequent equipment and transmitting abnormal information to the platform.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present invention is implemented as follows: a short-circuit detection method for preventing false judgment collects information on delayed detection time, post-stage circuit status, number of consecutive short-circuit events in the post-stage circuit, post-stage circuit detection cycle, and main power supply status, and accurately judges and processes short circuits by collecting and detecting the parameters of delayed detection time, post-stage circuit status, number of consecutive short-circuit events in the post-stage circuit, and post-stage circuit detection cycle under different main power supply states, so as to effectively filter out voltage fluctuations in the main power, backup power, and other power supplies.

[0007] Preferably, the state of the post-stage circuit for judging the state of the main power supply is determined according to the voltage of the equipment, including parameter values ​​of the main power minimum threshold, the number of consecutive main power detections, the median filtering level, and the detection cycle.

[0008] Preferably, the main power supply voltage value is obtained regularly according to the detection cycle, and the main power supply voltage value is subjected to multi-level filtering according to the median filtering level to determine whether the filtered main power supply voltage value is lower than the main power minimum threshold. If so, the main power supply is faulty, otherwise the main power supply is normal.

[0009] Preferably, if the main power supply is detected N times continuously and there is at least one main power supply failure but less than N times, the current main power supply status is main power fluctuation; if N consecutive detections are all main power supply failures, the current main power supply status is main power failure; if N consecutive detections are all normal, the current main power supply status is main power normal.

[0010] Preferably, the delayed detection time is the time for delaying the execution of short-circuit detection and processing when main power fluctuation is detected. The delayed detection time needs to be determined by monitoring the impact of on-site voltage fluctuations on the main power voltage and monitoring the main power voltage during the main-backup power switching process; The state of the subsequent circuit is realized by hardware construction to read the high and low levels of the IO specified by the single-chip microcomputer to determine the short circuit of the subsequent circuit, and the high and low levels are generated by comparing the voltage of the subsequent circuit with the specified voltage through a comparator to indicate the on and off of the subsequent circuit; The number of consecutive short circuits of the subsequent circuit is the number of times the state of the subsequent circuit is judged when the state of the main power supply is faulty or fluctuating; The subsequent circuit detection cycle is a time interval for actively reading the subsequent circuit status.

[0011] Preferably, the detection period is determined according to the larger value within the range of the AD conversion speed of the single-chip microcomputer and the software operation capability; The median filtering level is determined based on multiple experiments, so that the collected values ​​have no obvious jumps when compared with multiple consecutive values ​​after multi-level filtering; A power sampling circuit is built through resistor voltage division, and the power supply voltage is obtained through the single-chip microcomputer. When a tolerable voltage fluctuation occurs, the voltage fluctuation duration of the main power voltage is monitored to determine the delay detection time. According to the main power supply status, the IO interrupt of the microcontroller and the periodic access are used to collect the status of the subsequent circuit; The detection period of the subsequent circuit needs to be coordinated with the number of consecutive short circuits of the subsequent circuit.

[0012] Preferably, when the main power supply state is a main power failure or a main power fluctuation, the state of the subsequent circuit is actively collected, and the short circuit fault is determined before the subsequent circuit actually short-circuits and burns the circuit. The time obtained by multiplying the number of consecutive short circuits of the subsequent circuit and the subsequent circuit detection cycle is less than the minimum time for the fuse in the circuit to take effect.

[0013] Preferably, if the current main power supply state is normal and it is not in the delayed detection state at this time, the state of the subsequent circuit is detected by means of IO interruption. Once the subsequent circuit state is detected to be short-circuited, it is judged as a short-circuit fault, the power supply of the subsequent circuit is immediately cut off, and the abnormal information is transmitted to the platform; if the current main power supply state is normal and it is currently in the delayed detection state, it enters the delayed detection state and waits for the delay to end; If the current main power supply status is fluctuating, the voltage will fluctuate at this time. If the IO interruption method detects that the status of the subsequent circuit is short-circuited, it will enter the delayed detection state. During the delayed detection time, the IO interruption method is used to detect that the status of the subsequent circuit is short-circuited, and the power supply of the subsequent circuit will not be cut off. If the IO interruption method detects that the status of the subsequent circuit is not short-circuited, continue monitoring; If the current main power supply status is faulty, the backup power supply is in working state at this time. Even if the IO interrupt mode detects that the status of the subsequent circuit is short-circuited, no operation is performed. The MCU IO status is read regularly according to the subsequent circuit detection cycle. If the number of consecutive short circuits in the subsequent circuit reaches the limit, it is judged that a short circuit fault has occurred, and the power supply of the subsequent circuit is immediately cut off, and the abnormal information is transmitted to the platform.

[0014] A device for implementing a short-circuit detection method for preventing misjudgment comprises a main power supply, a backup power supply, a single-chip microcomputer, a short-circuit detection module, a rear-stage circuit interaction module and a rear-stage circuit power supply switching module. The main power supply, the backup power supply, the short-circuit detection module, the rear-stage circuit interaction module and the rear-stage circuit power supply switching module are all connected to the single-chip microcomputer, the rear-stage circuit power supply switching module is connected to the rear-stage circuit interaction module, and the rear-stage circuit interaction module is connected to the short-circuit detection module; the rear-stage circuit interaction module ensures normal linkage or communication between a device and a rear-stage device, the rear-stage circuit power supply cut-off module performs corresponding operations when the single-chip microcomputer instructs to cut off or open the rear-stage circuit power supply, and the short-circuit detection module is a hardware implementation for detecting whether the rear-stage interaction circuit is short-circuited, and cooperates with the single-chip microcomputer to realize short-circuit detection.

[0015] Preferably, it also includes a wireless upload module, which is connected to the single-chip microcomputer to report the detection results to the platform and notify the corresponding office and corresponding functional personnel.

[0016] Compared with the prior art, the present invention has the following beneficial effects: by reasonably determining the delayed detection time (DT), the method for judging the state of the subsequent circuit (CS), the number of consecutive short circuits of the subsequent circuit (CSC), the detection cycle of the subsequent circuit (CST), and the method for judging the state of the main power supply (MS), monitoring the current state of the main power supply (MS) through real-time voltage acquisition, judging whether the state of the main power supply (MS) is normal, fluctuating, or faulty, and dynamically adjusting the judgment method of the state of the subsequent circuit (CS) under different states; combining the delayed detection time (DT), the state of the subsequent circuit (CS), the number of consecutive short circuits of the subsequent circuit (CSC), the detection cycle of the subsequent circuit (CST), and the effective cooperation with the hardware, it is possible to filter out various fluctuations of the main and standby power and the on-site voltage, accurately judge the short circuit situation of the circuit to be judged, and timely protect the personal and property safety of the on-site through emergency methods such as powering off the subsequent equipment and transmitting abnormal information to the platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative work.

[0018] Figure 1 Flow chart of the short circuit detection method of the present invention.

[0019] Figure 2 The figure is a principle block diagram of the device for implementing the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0021] Example 1 like Figure 1 As shown, a short-circuit detection method for preventing false judgment includes collecting information on delayed detection time (DT), post-stage circuit status (CS), number of consecutive short circuits in the post-stage circuit (CSC), post-stage circuit detection cycle (CST), and main power supply status (MS). The short-circuit judgment method is dynamically adjusted under different main power supply status (MS) to effectively filter out the main power, backup power and other voltage fluctuations. Accurate judgment and processing of short circuits are achieved through coordinated detection of DT, CS, CSC, and CST parameters under each main power supply status (MS). The specific functions of each parameter are as follows: The main power supply status (MS) is the main basis for determining the method of judging the status of the post-collection circuit. The judgment method is as follows: First, you need to determine the parameter values ​​according to the voltage conditions of the equipment: main power minimum threshold (MMIT), main power continuous detection times (N), median filter level (FC), and detection cycle (T).

[0022] The minimum threshold of the main power is determined by the actual circuit voltage conditions when the main power is normal and when the voltage fluctuates. For example, assuming the main power is 24V, the voltage is stably greater than 22V when the main power is normal, and even slight fluctuations will be lower than 22V when the voltage fluctuates. The minimum threshold of the main power can be set to 22, which is an empirical value.

[0023] The number of continuous main power detections and the detection cycle are a standard for judging the main power supply status. It is a subjective desire to judge the severity of the main power. If there is an abnormality within 5ms, the main power is abnormal, and the number of times is determined in combination with the detection cycle.

[0024] The detection cycle determines the speed of judging the main power status, which in turn affects the speed of judging the short circuit detection. It is determined according to the larger value within the AD conversion speed of the microcontroller and the software operating capability.

[0025] The median filtering level is determined based on multiple experiments, so that there is no obvious jump in the comparison of multiple consecutive values ​​of the collected values ​​after filtering.

[0026] The main power supply voltage value is obtained regularly according to the detection cycle (T), and multi-level filtering is performed according to the median filter level (FC) to determine whether the filtered main power supply voltage value is lower than the main power minimum threshold (MMIT). If so, the main power supply is faulty, otherwise the main power supply is normal. If the main power supply is detected N times continuously and there is at least one main power supply fault but less than N times, the current main power supply status is main power fluctuation; if the main power supply is faulty for N consecutive times, the current main power supply status is main power fault; if the main power supply is normal for N consecutive times, the current main power supply status is main power normal.

[0027] The delayed detection time (DT) is the time to delay the execution of short-circuit detection and processing when the main power fluctuation is detected. The delayed detection time needs to be determined by monitoring the impact of the on-site voltage fluctuation on the main power voltage and the main power voltage during the main-backup power switching process. The power sampling circuit is built by resistor voltage division, and the power supply voltage is obtained through the single-chip AD. When a tolerable voltage fluctuation occurs, the voltage fluctuation duration of the main power voltage is monitored to determine the delayed detection time.

[0028] The status of the subsequent circuit (CS) is realized by hardware construction to read the high and low levels of the IO specified by the microcontroller to determine the short circuit of the subsequent circuit. The comparator compares the voltage of the subsequent circuit with the specified voltage (such as 0.02V) to generate high and low levels to indicate the on and off of the subsequent circuit. The specific implementation in the microcontroller can be divided into IO interruption and periodic access. According to the status of the main power supply, IO interruption and periodic access are used to collect the status of the subsequent circuit.

[0029] The number of consecutive short circuits (CSC) of the downstream circuit is the number of times the downstream circuit status is judged when the main power supply status is the main power failure or the main power fluctuation. It is judged as a short circuit only when it reaches a certain limit. In order to improve the fault tolerance of short circuit judgment, the number of short circuits is at least greater than or equal to 3 times.

[0030] The subsequent circuit detection cycle (CST) is the time interval for actively reading the subsequent circuit status, which needs to be coordinated with the number of consecutive short circuits (CSC) of the subsequent circuit.

[0031] When the main power supply status is the main power failure or main power fluctuation, the status of the back-stage circuit is actively collected to determine the short-circuit fault before the back-stage circuit actually short-circuits and burns the circuit. Combined with the number of consecutive short circuits (CSC) of the back-stage circuit and the detection cycle (CST) of the back-stage circuit, the time obtained by multiplying the two should be less than the minimum time for the fuse in the circuit to work. The detection cycle is also determined according to the software operation capability. The number of consecutive short circuits (CSC) of the back-stage circuit and the detection cycle (CST) of the back-stage circuit need to be determined according to the actual experiment of the specific circuit, which is an empirical value.

[0032] After the above parameters are determined, the short-circuit detection method to prevent false judgment can be executed as follows: If the current main power supply status (MS) is normal and it is not in the delayed detection state at this time, it proves that the current and previous main power supplies and voltages are normal. The state of the subsequent circuit (CS) is detected through IO interruption. Once the state of the subsequent circuit (CS) is detected to be short-circuited, it is judged as a short-circuit fault, and the power supply of the subsequent circuit is immediately cut off, and the abnormal information is transmitted to the platform. If the current main power supply status (MS) is normal and the current delayed detection state is in progress, that is, the main power is normal and enters the delayed detection state, no detection is performed during this period, and the delay is waited for. After the delay ends, exit the delayed detection state and re-determine how to detect based on the current power supply status.

[0033] If the current main power supply status (MS) is fluctuating, the voltage will fluctuate at this time. If the IO interruption method detects that the state of the subsequent circuit (CS) is short-circuited, it will enter the delayed detection state. During the delayed detection time (DT), regardless of the power supply status, the power supply of the subsequent circuit will not be cut off if the IO interruption method is used to detect that the state of the subsequent circuit (CS) is short-circuited, thereby reducing the short-circuit detection misjudgment caused by voltage fluctuations. If the IO interruption method detects that the state of the subsequent circuit (CS) is not short-circuited, it is normal to continue monitoring.

[0034] If the current main power supply status (MS) is faulty, the backup power is in working state. To avoid the misjudgment of the subsequent circuit status (CS) caused by the sudden recovery of the main power, no operation is performed even if the IO interrupt mode detects that the subsequent circuit status (CS) is short-circuited. The IO status of the microcontroller connected to the hardware is read regularly according to the subsequent circuit detection cycle (CST). If the consecutive short circuits of the subsequent circuit reach the CSC limit of the subsequent circuit status, it is judged that a real short circuit fault has occurred, and the power supply of the subsequent circuit is immediately cut off, and the abnormal information is transmitted to the platform.

[0035] It should be noted that this method needs to continuously adjust parameters and judgment methods through practice to achieve better short-circuit detection without false judgments, so that this method can play a greater role.

[0036] Example 2 Before using the short-circuit detection method of Example 1, a short-circuit detection implementation device for preventing misjudgment should be designed based on a certain industrial alarm control device or similar device, including main power, backup power, single-chip microcomputer, short-circuit detection module, rear-stage circuit interaction module, and rear-stage circuit power switching module. The main power, backup power, short-circuit detection module, rear-stage circuit interaction module, and rear-stage circuit power switching module are all connected to the single-chip microcomputer, and the rear-stage circuit power switching module is connected to the rear-stage circuit interaction module, and the rear-stage circuit interaction module is connected to the short-circuit detection module. The main power and backup power ensure the normal operation of the equipment. The main power is directly connected to the main power, and the backup power is a battery brought by the equipment. When the main power is abnormal, the backup power works to ensure the operation of the equipment. The rear-stage circuit interaction module ensures the normal linkage or communication between the equipment and the rear-stage equipment. The rear-stage circuit power cut-off module is used to perform corresponding operations when the single-chip microcomputer indicates to cut off or turn on the rear-stage circuit power. The short-circuit detection module is a hardware implementation for detecting whether the rear-stage interactive circuit is short-circuited, and it is necessary to cooperate with the single-chip microcomputer to realize short-circuit detection. The single chip microcomputer realizes the functional operation of the device and all the logic of the short circuit detection method.

[0037] It also includes a wireless upload module, which is connected to the single-chip microcomputer to report the test results to the platform and notify the corresponding office and corresponding functional personnel.

[0038] The parameters for determining the delayed detection time (DT), the status of the subsequent circuit (CS), the number of consecutive short circuits of the subsequent circuit (CSC), the subsequent circuit detection cycle (CST), and the main power supply status (MS) should be determined according to the hardware conditions of the equipment and the possible on-site environment. The reasonable determination of these parameters and judgment methods should fully rely on the equipment hardware, usage environment, a large amount of time monitoring and experience values.

[0039] After the parameters and methods to be determined are determined, the software function module is implemented according to the detection method described in the present invention, and the program file with the function module is burned into the device, so that short-circuit detection that prevents false judgment can be realized.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A short circuit detection method for preventing misjudgment, characterized in that: Collect information on delayed detection time, post-stage circuit status, number of consecutive short circuits in the post-stage circuit, detection cycle of the post-stage circuit, and main power supply status. Accurately judge and handle short circuits by collecting parameters of delayed detection time, post-stage circuit status, number of consecutive short circuits in the post-stage circuit, and detection cycle of the post-stage circuit under different main power supply states, so as to effectively filter out voltage fluctuations in the main power, backup power, and other voltages.

2. The short-circuit detection method for preventing misjudgment according to claim 1, characterized in that: The state of the post-stage circuit for judging the state of the main power supply is determined according to the voltage of the equipment, including the parameter values ​​of the main power minimum threshold, the number of main power continuous detection times, the median filter level, and the detection cycle.

3. The short-circuit detection method for preventing misjudgment according to claim 2, characterized in that: The main power supply voltage value is obtained regularly according to the detection cycle, and the main power supply voltage value is multi-level filtered according to the median filtering level to determine whether the filtered main power supply voltage value is lower than the main power minimum threshold. If so, the main power supply is faulty, otherwise the main power supply is normal.

4. The short-circuit detection method for preventing misjudgment according to claim 3, characterized in that: If the main power supply is detected N times in a row and there is at least one main power supply failure but less than N times, the current main power supply status is main power fluctuation; if N consecutive detections are all main power supply failures, the current main power supply status is main power failure; if N consecutive detections are all normal, the current main power supply status is main power normal.

5. The short-circuit detection method for preventing misjudgment according to any one of claims 1 to 4, characterized in that: The delayed detection time is the time for delaying the execution of short-circuit detection and processing when main power fluctuation is detected. The delayed detection time needs to be determined by monitoring the impact of on-site voltage fluctuations on the main power voltage and monitoring the main power voltage during the main-backup power switching process; The state of the subsequent circuit is realized by hardware construction to read the high and low levels of the IO specified by the single-chip microcomputer to determine the short circuit of the subsequent circuit, and the high and low levels are generated by comparing the voltage of the subsequent circuit with the specified voltage through a comparator to indicate the on and off of the subsequent circuit; The number of consecutive short circuits of the subsequent circuit is the number of times the state of the subsequent circuit is judged when the state of the main power supply is faulty or fluctuating; The subsequent circuit detection cycle is a time interval for actively reading the subsequent circuit status.

6. The short-circuit detection method for preventing misjudgment according to claim 5, characterized in that: The detection cycle is determined according to the larger value within the range of the AD conversion speed of the single chip microcomputer and the software operation capability; The median filtering level is determined based on multiple experiments, so that the collected values ​​have no obvious jumps when compared with multiple consecutive values ​​after multi-level filtering; A power sampling circuit is built through resistor voltage division, and the power supply voltage is obtained through the single-chip microcomputer. When a tolerable voltage fluctuation occurs, the voltage fluctuation duration of the main power voltage is monitored to determine the delay detection time. According to the main power supply status, the IO interrupt of the microcontroller and the periodic access are used to collect the status of the subsequent circuit; The detection period of the subsequent circuit needs to be coordinated with the number of consecutive short circuits of the subsequent circuit.

7. The short-circuit detection method for preventing misjudgment according to claim 5, characterized in that: When the main power supply status is main power failure or main power fluctuation, the status of the subsequent circuit is actively collected to determine the short circuit fault before the subsequent circuit actually short-circuits and burns the circuit. The time obtained by multiplying the number of consecutive short circuits of the subsequent circuit and the subsequent circuit detection cycle is less than the minimum time for the fuse in the circuit to take effect.

8. The short-circuit detection method for preventing misjudgment according to any one of claims 1 to 4, 6 or 7, characterized in that: If the current main power supply status is normal and it is not in the delayed detection status, the status of the subsequent circuit is detected through IO interruption. Once the subsequent circuit status is detected to be short-circuited, it is judged as a short-circuit fault, and the power supply of the subsequent circuit is immediately cut off, and the abnormal information is transmitted to the platform; if the current main power supply status is normal and it is currently in the delayed detection status, it enters the delayed detection status and waits for the delay to end; If the current main power supply status is fluctuating, the voltage will fluctuate at this time. If the IO interruption method detects that the status of the subsequent circuit is short-circuited, it will enter the delayed detection state. During the delayed detection time, the IO interruption method is used to detect that the status of the subsequent circuit is short-circuited, and the power supply of the subsequent circuit will not be cut off. If the IO interruption method detects that the status of the subsequent circuit is not short-circuited, continue monitoring; If the current main power supply status is faulty, the backup power supply is in working state at this time. Even if the IO interrupt mode detects that the status of the subsequent circuit is short-circuited, no operation is performed. The MCU IO status is read regularly according to the subsequent circuit detection cycle. If the number of consecutive short circuits in the subsequent circuit reaches the limit, it is judged that a short circuit fault has occurred, and the power supply of the subsequent circuit is immediately cut off, and the abnormal information is transmitted to the platform.

9. The device for implementing the short-circuit detection method for preventing misjudgment according to claim 8, characterized in that: It includes a main power supply, backup power, a single-chip microcomputer, a short-circuit detection module, a rear-stage circuit interaction module and a rear-stage circuit power switching module. The main power supply, backup power, short-circuit detection module, rear-stage circuit interaction module and rear-stage circuit power switching module are all connected to the single-chip microcomputer, the rear-stage circuit power switching module is connected to the rear-stage circuit interaction module, and the rear-stage circuit interaction module is connected to the short-circuit detection module; the rear-stage circuit interaction module ensures normal linkage or communication between the device and the rear-stage device, the rear-stage circuit power cut-off module performs corresponding operations when the single-chip microcomputer instructs to cut off or turn on the rear-stage circuit power, and the short-circuit detection module is a hardware implementation for detecting whether the rear-stage interaction circuit is short-circuited, and cooperates with the single-chip microcomputer to realize short-circuit detection.

10. The implementation device according to claim 9, characterized in that: It also includes a wireless upload module, which is connected to the single-chip microcomputer to report the test results to the platform and notify the corresponding office and corresponding functional personnel.

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