Online circuit testing method with dynamic threshold value

Abstract

The invention relates to the technical field of automatic temperature control devices, and discloses an on-line circuit test method with a dynamic threshold value, which comprises the following steps: acquiring the relationship between current and voltage when low voltage and high voltage are simultaneously started, constructing a current-voltage curve graph, starting a communication circuit through communication control, and sending a discharge instruction to a detonator. Closing an ignition circuit and a communication circuit; comparing and judging the state of a control branch, if the control branch is normal, the detonator current IOHV is greater than the dynamic threshold ITH (t), if the control branch is short-circuited, the detonator current IOHV is approximately equal to the IIT (t), and if the control branch is open-circuited, the ignition circuit and the communication circuit are closed; if the current is not changed but the ignition voltage cannot be transmitted to the detonator, reporting the state of the control branch, and if the control branch is detected to be damaged, forbidding detonation and discharging by the system.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature automatic control devices, and particularly relates to an online circuit testing method with a dynamic threshold. Background Art

[0002] In the civil explosive industry, long wires are usually used as blasting wires to connect a certain number of electronic delay detonators. The initiator sends signals to each electronic delay detonator through the blasting wire, and each electronic delay detonator responds to the instructions sent by the initiator according to a specific protocol.

[0003] To ensure the safety of blasting personnel, the blasting wire is generally very long, and 1000 meters is a common length reference value. Due to the harsh conditions at the blasting site and the tight time after charging, there may be a situation of short - circuit of the blasting wire during the network connection detection. Using over - current detection for connection detection can exclude general simple short - circuits of the blasting wire, but it cannot avoid the short - circuit of the blasting wire caused instantaneously by explosion. At the moment of explosion, there is a certain probability that the blasting wire will be instantaneously or permanently short - circuited. Since ignition is a time period, the ignition high voltage always exists on the blasting wire during this time period, and the duration exceeds the time for the primer to cause detonation. If a short - circuit occurs during this ignition time period, after this blasting, there is a risk of damage to the control branch of the ignition circuit of the initiator. Usually, the short - circuit of the control branch is more dangerous. Since the communication circuit is independent of the ignition circuit and has a low working voltage, it will basically not be damaged. Therefore, when the control branch of the ignition circuit is damaged, the connection detection can often be successfully executed. When entering the waiting - for - explosion state, the ignition circuit starts to work and outputs high voltage outward. Due to the damage of the control branch of the ignition circuit, the ignition high voltage will be transmitted along the damaged control branch to the detonator when the ignition circuit starts, thus causing premature explosion. Premature explosion will affect the blasting effect and even threaten the lives of the staff. Therefore, it is necessary to conduct an online inspection of the ignition control branch to reduce premature explosion accidents and reduce risks.

[0004] For example, the "Online Circuit Testing Method with a Dynamic Threshold" with patent application number CN202411475115.6 can work reliably when the number of detonators is small or the load is stable. When the number of detonators is large, due to the voltage change of the blasting wire, external interference, discreteness and non - linearity of the detonator current, there are relatively high false alarms and it is sensitive to leakage.

[0005] Based on this, the present application proposes an online circuit testing method with a dynamic threshold. Summary of the Invention

[0006] The purpose of the present invention is to provide an online circuit testing method with a dynamic threshold, which indirectly detects the circuit state of the ignition branch by detecting the current of the communication circuit, reduces premature explosion accidents and reduces risks. By dynamically adjusting the threshold, the present invention can adapt to the circuit state in different environments and significantly improve the accuracy and reliability of detection.

[0007] The object of the present invention can be achieved by the following technical solutions:

[0008] An on-line circuit testing method with a dynamic threshold, comprising the following steps:

[0009] S1: Obtain the relationship between current and voltage when low voltage and high voltage are turned on simultaneously, construct a current-voltage curve graph, and select the linear segment in the curve graph to establish a fitting formula I OLV = a TH × V OLV + b TH , and determine the parameters a TH and b TH ;

[0010] S2: Start the communication circuit through communication control, send a discharge instruction to the detonator, and make the detonator discharge to release the residual voltage energy on the ignition capacitor;

[0011] S3: Start measuring the real-time detonator current V OLV (t) and establish a dynamic threshold I TH (t), start measuring the real-time detonator current I OHV ;

[0012] S4: Turn off the ignition circuit and the communication circuit;

[0013] S5: Compare and determine the state of the control branch. If the control branch is normal, the detonator current I OHV is greater than the dynamic threshold I TH (t);

[0014] If the control branch is short-circuited, the detonator current I OHV ≈ I TH (t);

[0015] If the control branch is open, the current remains unchanged but the ignition voltage cannot be transmitted to the detonator;

[0016] S6: Report the state of the control branch. If it is detected that the control branch is damaged, the system prohibits detonation and discharges;

[0017] S7: Collect data on the circuit state based on multi-sensor fusion technology to construct a historical database, and perform early warning identification of the circuit fault state according to the processing of the historical database and real-time monitoring data.

[0018] As a further solution of the present invention: The setting of the dynamic threshold I TH (t) is 1 / 5 to 4 / 5 of the working current of a single detonator.

[0019] As a further solution of the present invention: The discharge time T1 of the detonator depends on the time constant of the detonator.

[0020] As a further solution of the present invention: the dynamic threshold I TH (t) is established based on the current response curve of the detonator at different voltages, and the threshold is dynamically adjusted through a fitting formula to adapt to the circuit state under different environments.

[0021] As a further solution of the present invention: raise the gun line, set the voltage difference between gun lines A / B to a set low voltage, and start the voltage detection circuit to detect the operating voltage V OLV (t), I TH (t) = a TH ×V OLV (t) + b TH .

[0022] As a further solution of the present invention: when the control branch is short-circuited, when I OHV < I TH (t) + I TH2 , it is determined that the control branch is short-circuited, and the state of the control branch is modified to a damaged state.

[0023] As a further solution of the present invention: the multi-sensor fusion technology includes a temperature sensor, a humidity sensor, and a vibration sensor, which are used to collect historical data of the circuit.

[0024] As a further solution of the present invention: the early warning process for the circuit fault state is based on processing the historical collected data by a machine learning algorithm.

[0025] As a further solution of the present invention: perform fusion processing on the monitoring data to extract the characteristics of the historical collected data of the circuit, train a machine learning model using the historical data, and process the extracted characteristics to obtain a health index.

[0026] As a further solution of the present invention: when the health index is lower than a preset threshold, the system issues a fault warning to prompt the user to perform maintenance or replace circuit components.

[0027] Advantages of the present invention: The present invention combines a microprocessor, can reliably detect a short circuit in the control branch of the ignition circuit, is insensitive to the number of detonators and leakage, significantly reduces the early explosion accidents of detonators, improves blasting safety, and can adapt to the circuit state under different environments by dynamically adjusting the threshold, significantly improving the accuracy and reliability of detection;

[0028] By combining multi-dimensional features such as the rate of temperature change, the rate of humidity change, the peak value of vibration, current fluctuations, and voltage fluctuations, the present invention can significantly improve the calculation effect of the health index based on machine learning algorithms. The combination of such multi-dimensional features can not only comprehensively reflect the health status of the circuit but also capture potential fault modes, thereby improving the accuracy of fault prediction and reducing the occurrence of sudden faults. By real-time monitoring and analyzing these features, it can provide strong support for the health management of the circuit, extend the equipment life, reduce the maintenance cost, improve the production efficiency, and enhance the equipment reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] Figure 1 is a flowchart of an online circuit testing method with a dynamic threshold according to an embodiment of the present invention;

[0031] Figure 2 is the I in an online circuit testing method with a dynamic threshold according to an embodiment of the present invention OLV -V OLV curve graph;

[0032] Figure 3 is a block diagram of a detonating system according to an embodiment of the present invention;

[0033] Figure 4 is a block diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0035] Embodiment 1

[0036] Please refer to Figure 1 as shown, the present invention is an online circuit testing method with a dynamic threshold, including the following steps:

[0037] Step 1: Obtain the relationship between the current when LV (low voltage) and HV (high voltage) are turned on simultaneously and LV (low voltage);

[0038] Turn on LV (low voltage) and HV (high voltage) simultaneously, start the current detection circuit 20 to detect the working current I of the detonator 50 OLV , and start the voltage detection circuit 25 to detect the working voltage V of the detonator 50 OLV ;

[0039] As shown Figure 2 , plot the I OLV -V OLV curve graph, select the linear segment in the curve graph, and establish the fitting formula I OLV = a TH ×V OLV + b TH , and determine the parameters a TH and b TH ;

[0040] Step 2: Detonator discharge:

[0041] Start the communication circuit 10 through the communication control Ctl. The microprocessor circuit 40 sends a discharge instruction to the input In of the communication circuit 10. After being processed by the communication circuit 10, the low-voltage communication signal is transmitted to the detonator 50 through the current detection circuit 20, the first reverse protection diode D1, and the blasting cable. Each detonator 50 performs a discharge action to completely release the residual voltage energy on the firing capacitor;

[0042] Among them, the discharge time T1 depends on the time constant of the detonator, generally 1 - 10 seconds;

[0043] Step 3: Measure the real-time detonator current V OLV (t) and establish the dynamic threshold I TH (t);

[0044] Raise the blasting cable, set the voltage difference between the blasting cables A / B to the set low voltage LV (low voltage), and start the voltage detection circuit 20 to detect the working voltage V OLV (t) of the detonator 50, I TH (t) = a TH ×V OLV (t) + b TH ;

[0045] Step 4: Turn off the ignition circuit 30 and the communication circuit 10 for subsequent work;

[0046] Step 5: Compare and determine the state of the control branch:

[0047] If the control branch is normal, since the ignition enable En2 is not turned on, the high voltage HV cannot be transmitted to the blasting cable A, and the detonator current I OHV should be greater than the dynamic threshold I TH (t). Theoretically, this difference is at least the working current of one detonator. Considering the influence of distributed parameters, set this threshold I TH (t) to 1 / 5 to 4 / 5 of the working current of a single detonator;

[0048] Preferably, I TH (t) is set to half of the working current of a single detonator;

[0049] If the control branch is short-circuited, even if the ignition enable En2 is not turned on, the high voltage HV (high voltage) will be transmitted to the gun line A. Since HV (high voltage) is greater than LV (low voltage), the current I measured when the ignition circuit 30 is turned on OHV will not include the operating current of the detonator, and its theoretical value is the dynamic threshold of the detonator, that is, I OHV ≈I TH (t);

[0050] When I OHV <I TH (t)+I TH2 , it is determined that the control branch is short-circuited, and the state of the control branch is modified to the damaged state;

[0051] If the control branch is open-circuited, although the current remains unchanged, the ignition voltage during detonation cannot be transmitted to the detonator 50, and the detonator can be replaced in time for operation;

[0052] Step Six: Report the state of the control branch;

[0053] After detecting that the control branch is damaged, the mcu reports the circuit damage to the system. The system prohibits detonation and discharges. At the same time, even if the mcu receives a charging instruction, it does not perform a charging operation to ensure safety.

[0054] Embodiment 2

[0055] During the operation of the circuit, historical data of the circuit state is collected. The collected data includes temperature, humidity, vibration, current, and voltage;

[0056] Among them, the collected historical data is cleaned and preprocessed to remove noise and outliers;

[0057] Extract features from the historical data;

[0058] Exemplary:

[0059] The process of obtaining the temperature change rate is as follows:

[0060] Obtain the instantaneous temperature change rate ΔTs = T t -T t-1 ;

[0061] Among them, T t is the temperature at the current moment, and T t-1 is the temperature at the previous moment;

[0062] Obtain the moving average temperature change rate

[0063]

[0064] Among them, n is the size of the moving window, and Ti is the temperature at the i-th moment;

[0065] Obtain the temperature extreme value change rate

[0066]

[0067] where T t-n:t is the temperature data from time t - n to time t, and n is the time window;

[0068] Perform weighted processing on the instantaneous temperature change rate ΔTs, the moving average temperature change rate ΔTm, and the temperature extreme value change rate ΔTg;

[0069] Allocate the weight ratio of the instantaneous temperature change rate ΔTs as r1, the weight ratio of the moving average temperature change rate ΔTm as r2, and the weight ratio of the temperature extreme value change rate ΔTg as r3;

[0070] Calculate the temperature change rate ΔT through the formula ΔT = ΔTs * r1 + ΔTm * r2 + ΔTg * r3, where r1 + r2 + r3 = 1, and r1, r2, and r3 are all greater than zero;

[0071] The temperature change rate obtained in this embodiment can reflect the heat change situation generated by the circuit during operation. By analyzing the temperature change rate, it is possible to effectively predict whether there is an overheating risk in the circuit, so as to take measures in advance to avoid circuit damage.

[0072] The process of obtaining the humidity change rate is as follows:

[0073] Obtain the instantaneous humidity change rate ΔHs = H t - H t-1 ;

[0074] where H t is the humidity at the current moment, and H t-1 is the humidity at the previous moment;

[0075] Obtain the moving average humidity change rate

[0076]

[0077] where n is the size of the moving window, and Hi is the humidity at the i-th moment;

[0078] Obtain the humidity extreme value change rate

[0079]

[0080] where H t-n:t is the humidity data from time t - n to time t, and n is the time window;

[0081] Perform weighted processing on the instantaneous humidity change rate ΔHs, the moving average humidity change rate ΔHm, and the humidity extreme value change rate ΔHg;

[0082] Allocate the weight proportion of the instantaneous humidity change rate ΔHs as R1, allocate the weight proportion of the moving average humidity change rate ΔHm as R2, and allocate the weight proportion of the humidity extreme value change rate ΔHg as R3;

[0083] Calculate the temperature change rate ΔH through the formula ΔH = ΔHs*R1 + ΔHm*R2 + ΔHg*R3, where R1 + R2 + R3 = 1 and R1, R2, and R3 are all greater than zero;

[0084] The humidity change rate can reflect the impact of environmental humidity changes on the circuit. Excessive humidity may cause circuit leakage or short - circuit, while too low humidity may lead to static electricity accumulation. By analyzing the humidity change rate, it is possible to effectively predict whether there is a fault risk in the circuit caused by humidity changes.

[0085] Vibration peak value: V max = max(V t )

[0086] where Vt is the vibration signal value at time t, and the vibration signal is usually collected through a vibration sensor;

[0087] The vibration peak value can reflect the mechanical vibration intensity that the circuit experiences during operation. Excessive vibration may cause loose circuit connections or component damage. By analyzing the vibration peak value, it is possible to predict whether there is a fault risk in the circuit caused by vibration.

[0088] Current fluctuation: ΔI = I t - I t-1 ;

[0089] where I t is the current at time t, and I t-1 is the current at the previous time;

[0090] The current fluctuation can reflect the change of the current in the circuit during operation. Excessive current fluctuation may mean unstable circuit load or short - circuit risk. By analyzing the current fluctuation, it is possible to predict whether there is a fault risk in the circuit caused by current instability;

[0091] Voltage fluctuation: ΔU = U t - U t-1 ;

[0092] where U t is the voltage at time t, and U t-1 is the voltage at the previous time;

[0093] Voltage fluctuations can reflect the voltage changes in the circuit during operation. Excessive voltage fluctuations may indicate unstable power supply or the risk of short circuit. By analyzing voltage fluctuations, it is possible to predict whether there is a risk of circuit failure caused by voltage instability;

[0094] Use historical data to train machine learning models (such as random forest, XGBoost, neural network, etc.), with the input being the extracted features and the output being the circuit health index;

[0095] Exemplary:

[0096] Use the random forest model to predict the health index:

[0097] HI = RF(T, H, V, I, U, ΔT, ΔH, Vmax, ΔI, ΔU)

[0098] Where RF is the random forest model.

[0099] When the circuit health index is lower than the preset threshold, the system issues a fault warning to prompt the user to perform maintenance or replace circuit components;

[0100] This application can significantly improve the calculation effect of the health index based on machine learning algorithms by combining multi-dimensional features such as temperature change rate, humidity change rate, vibration peak value, current fluctuation, and voltage fluctuation. The combination of these multi-dimensional features can not only comprehensively reflect the health status of the circuit but also capture potential fault modes, thereby improving the accuracy of fault prediction and reducing the occurrence of sudden faults. By real-time monitoring and analyzing these features, it can provide strong support for the health management of the circuit, extend the equipment life, reduce maintenance costs, improve production efficiency and equipment reliability.

[0101] Embodiment 3

[0102] As Figure 3 The shown detonator system block diagram includes a communication circuit 10, a current detection circuit 20, a voltage detection circuit 25, an ignition circuit 30, a microprocessor circuit 40, and a detonator 50;

[0103] Among them, the communication circuit 10, the current detection circuit 20, the voltage detection circuit 25, the ignition power 30, and the microprocessor circuit 40 together form a detonator;

[0104] The detonator is connected to the detonator 50 through a blasting wire, and multiple detonators 50 are connected in parallel.

[0105] Embodiment Four

[0106] Refer to Figure 4, an embodiment of the present invention further provides a computer device 3, including: a memory 302, a processor 301, and a computer program 303 stored on the memory 302. When the computer program 303 is executed on the processor 301, the online circuit testing method with a dynamic threshold described above is implemented.

[0107] The computer device 3 may be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. The computer device 3 may include, but is not limited to, a processor 301 and a memory 302. Those skilled in the art can understand that Figure 3 merely examples of the computer device 3, which do not constitute a limitation on the computer device 3, may include more or fewer components than those shown in the figure, or combine some components, or different components. For example, it may also include input / output devices, network access devices, etc.

[0108] The so-called processor 301 may be a central processing unit (CPU), and the processor 301 may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0109] In some embodiments, the memory 302 may be an internal storage unit of the computer device 3, such as the hard disk or memory of the computer device 3. In some other embodiments, the memory 302 may also be an external storage device of the computer device 3, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the computer device 3. Further, the memory 302 may also include both the internal storage unit and the external storage device of the computer device 3. The memory 302 is used to store an operating system, application programs, a boot loader, data, and other programs, such as the program code of the computer program. The memory 302 may also be used to temporarily store data that has been output or will be output.

[0110] Embodiment 4

[0111] An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is run by a processor, the online circuit testing method with a dynamic threshold described above is implemented.

[0112] In this embodiment, if the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, to implement all or part of the processes in the above embodiment methods of this application, a computer program can be used to instruct relevant hardware to complete. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above various method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can at least include: any entity or device that can carry the computer program code to the photographing device / terminal device, recording medium, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal, and software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk, or an optical disc, etc. In some jurisdictions, according to legislation and patent practice, the computer-readable medium cannot be an electrical carrier signal and a telecommunication signal.

[0113] In the above embodiments, the descriptions of the various embodiments each have their own emphases. For the parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0114] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0115] In the embodiments disclosed in the present application, it should be understood that the disclosed device / terminal device and method can be implemented in other ways. For example, the device / terminal device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in electrical, mechanical or other forms.

[0116] The unit described as a separate component may or may not be physically separated. The component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or it may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0117] The working principle of the present invention: The present invention combines a microprocessor and can reliably detect a short circuit in the control branch of the ignition circuit while being insensitive to the number of detonators and leakage, significantly reducing the accidental premature explosion of detonators and improving blasting safety. By dynamically adjusting the threshold, the present invention can adapt to the circuit state in different environments and significantly improve the accuracy and reliability of detection;

[0118] At the same time, the present invention combines multi-sensor fusion technology and can reliably detect a short circuit in the control branch of the ignition circuit while being insensitive to the number of detonators and leakage, significantly reducing the accidental premature explosion of detonators and improving blasting safety.

[0119] The above has described a detailed description of an embodiment of the present invention, but the content described is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the present invention application should still fall within the scope covered by the patent of the present invention.

Claims

1. An online circuit testing method with a dynamic threshold, characterized in that: The following steps are involved: S1: Obtain the relationship between current and voltage when low voltage and high voltage are turned on at the same time, construct a current-voltage curve, and select the linear segment in the curve to establish the fitting formula I OLV =a TH ×V OLV +b TH , determine the parameter a TH and b TH ; S2: Start the communication circuit through communication control and send a discharge command to the detonator, so that the detonator discharges and releases the residual voltage energy on the ignition capacitor; S3: Start low voltage measurement of real-time detonator current V OLV (t) and establish a dynamic threshold I TH (t), start high voltage to measure the real-time detonator current I OHV ; S4: turn off the ignition circuit and the communication circuit; S5: Compare and determine the state of the control branch. If the control branch is normal, the detonator current I OHV Greater than the dynamic threshold I TH (t); If the control branch is short-circuited, the detonator current I OHV ≈I TH (t); If the control branch is open, the current remains unchanged but the ignition voltage cannot be transmitted to the detonator; S6: Report the control branch status. If the control branch is detected to be damaged, the system prohibits detonation and discharge; S7: Based on multi-sensor fusion technology, data on circuit status is collected to build a historical database, and based on the processing of the historical database and real-time monitoring data, early warning identification of circuit fault status is performed.

2. The online circuit testing method with dynamic threshold according to claim 1, characterized in that: The dynamic threshold I TH (t) is set to 1 / 5 to 4 / 5 of the operating current of a single detonator.

3. The online circuit testing method with dynamic threshold according to claim 1, characterized in that: The detonator discharge time T1 depends on the time constant of the detonator.

4. The online circuit testing method with dynamic threshold according to claim 1, characterized in that: The dynamic threshold I TH The establishment of (t) is based on the current response curve of the detonator under different voltages, and the threshold is dynamically adjusted through the fitting formula to adapt to the circuit status under different environments.

5. The online circuit testing method with dynamic threshold according to claim 4, characterized in that: Pull up the gun line, set the voltage difference between the gun line A and B to the set low voltage, and start the voltage detection circuit to detect the working voltage V of the detonator. OLV (t), I TH (t) = a TH ×V OLV (t)+b TH .

6. The online circuit testing method with dynamic threshold according to claim 1, characterized in that: When the control branch is short-circuited, when I OHV <I TH (t)+I TH2 When the control branch is short-circuited, the control branch status is changed to a damaged status.

7. The online circuit testing method with dynamic threshold according to claim 1, characterized in that: The multi-sensor fusion technology includes a temperature sensor, a humidity sensor and a vibration sensor, which are used to collect circuit historical data.

8. The online circuit testing method with dynamic threshold according to claim 7, characterized in that: The early warning process of circuit fault status is based on the processing of historical collected data by machine learning algorithms.

9. The online circuit testing method with dynamic threshold according to claim 8, characterized in that: The monitoring data is fused to extract the features of the circuit's historical data, the historical data is used to train the machine learning model, and the extracted features are processed to obtain the health index.

10. The online circuit testing method with dynamic threshold according to claim 9, characterized in that: When the health index is lower than the preset threshold, the system issues a fault warning, prompting the user to perform maintenance or replace circuit components.

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