Circuit line safe operation monitoring method based on digital twinning

Abstract

The invention discloses a circuit line safe operation monitoring method based on digital twinning, and relates to the technical field of circuit line operation monitoring. Laser reflection signal frequency spectrums, environment temperature change curves and operation thermal stripe change images of all line detection areas at all time nodes are acquired; a three-dimensional image model is established according to the laser reflection signal frequency spectrum, an influence relation graph is established according to the environment temperature change curve and the operation thermal stripe change image, and the influence relation graph is mapped to the three-dimensional image model to generate a three-dimensional thermal stripe change image model; according to the three-dimensional thermal stripe change image model under each time node, an operation anomaly detection decision is set, real-time data of each line detection area is collected, whether the line detection area is abnormal is further judged, a maintenance decision is generated according to a judgment result, and digital monitoring of the circuit line is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit line operation monitoring, and in particular to a circuit line safe operation monitoring method based on digital twins. Background Art

[0002] Line safety operation monitoring refers to the real-time monitoring of transmission lines, distribution lines and related equipment to ensure the stable operation of the power system and power supply safety.

[0003] The existing line safety operation monitoring technology has the following defects: Video surveillance technology: Traditional video surveillance directly transmits the collected images to the monitoring background without processing. This processing method is a great test for the monitoring background server's ability to process data. In addition, the monitoring background needs to observe the monitoring points continuously, which will consume a lot of manpower and material resources.

[0004] Transmission line vibration monitoring technology: The vibration conditions of the line are carefully analyzed and calculated based on the acceleration of multiple vibration points within a range, so as to obtain the basic data parameters of the line within the range, and analyze whether the line has vibration hazards based on the vibration half-wave number of the vibrating line and the trajectory-related parameters of the conductor operation. If the warning value is exceeded, an alarm message will be issued immediately. However, the vibration monitoring equipment may not be able to cover all lines, especially in complex terrain or vast areas, and there may be monitoring blind spots.

[0005] Therefore, how to improve the intelligence of circuit line detection while reducing monitoring leakage points is a difficulty in the existing technology. To this end, a circuit line safe operation monitoring method based on digital twins is provided. Summary of the invention

[0006] In order to solve the above technical problems, the purpose of the present invention is to provide a circuit line safe operation monitoring method based on digital twins.

[0007] In order to achieve the above object, the present invention provides the following technical solutions: A method for monitoring safe operation of a circuit line based on digital twins comprises the following steps: S1. Divide the circuit into several circuit detection areas, and set multiple sensors for each circuit detection area, so as to collect the laser reflection signal spectrum, ambient temperature change curve and operation thermal pattern change image of each time node in the circuit detection area under normal operation every day; S2. Establish a three-dimensional image model of the corresponding line detection area at each time node according to the laser reflection signal spectrum, and establish an influence relationship diagram of the line detection area according to the ambient temperature change curve and the running thermal pattern change image; S3, mapping the influence relationship diagram onto the three-dimensional image model to obtain a three-dimensional thermal pattern change image model of the line detection area at each time node; S4, setting operation anomaly detection decision according to the three-dimensional thermal pattern change image model at each time node; S5, collecting the real-time laser reflection signal spectrum, real-time ambient temperature change curve and real-time running thermal pattern change image of each line detection area, and judging whether there are abnormalities in the real-time laser reflection signal spectrum, real-time ambient temperature change curve and real-time running thermal pattern change image through abnormality detection decision; S6. Generate a corresponding line maintenance decision according to the judgment result of step S5.

[0008] Furthermore, the acquisition process of the laser reflection signal spectrum, the ambient temperature change curve and the running thermal pattern change image includes: Divide the circuit into several circuit detection areas, set a number for each circuit detection area, and set a temperature sensor, an infrared camera and a laser camera for each circuit detection area; The daily time length is divided into H time segments. The temperature sensors in each line detection area collect ambient temperature values ​​to generate an ambient temperature change curve. The infrared camera collects several operating thermal pattern change images of the line detection area. The laser camera sends a laser signal to the line detection area. The laser camera then generates a laser reflection signal spectrum of the corresponding time segment based on the received laser reflection signal. The thermal patterns on the thermal pattern distribution image are marked with corresponding temperature values. H is a natural number greater than 0.

[0009] Furthermore, the process of establishing the three-dimensional image model of the line detection area includes: When the laser camera sends a laser signal to the line, the laser signal first passes through the insulator to generate a first laser reflection signal, and then generates a second laser emission signal when the laser signal passes through the wire. Then, when the laser signal passes through the insulator again and reaches the ground, the first laser reflection signal is generated again. Then, according to the time interval between the first laser reflection signal and the second laser reflection signal in the laser reflection signal spectrum and the propagation speed of the laser signal, the thickness of the wire and the insulator in the circuit line is obtained, and then a three-dimensional image model of the circuit detection area is established and marked with corresponding numbers.

[0010] Furthermore, the process of establishing the influence relationship diagram includes: Establish a three-dimensional rectangular coordinate system, and map the ambient temperature change curves and operation thermal pattern change images of different years but the same date and the same time period onto the same three-dimensional rectangular coordinate system; The time segment is divided into several time nodes, and the running thermal pattern change image is mapped on the xy axis plane in the three-dimensional rectangular coordinate system. Then, according to the length and width of the running thermal pattern change image, the ambient temperature change curve is stretched into an ambient temperature change image, and mapped on top of the running thermal pattern change image; The thermal pattern lines on the thermal pattern change image running at the same time node are connected and matched with the ambient temperature change image, and then the influence relationship diagram of each line detection area under each ambient temperature is obtained.

[0011] Furthermore, the process of establishing the three-dimensional thermal pattern change image model includes: Setting a three-dimensional coordinate system, setting a number of edge feature points on the running thermal pattern change image in the influence relationship diagram, and then mapping the three-dimensional image model of the line detection area and the running thermal pattern image on the three-dimensional coordinate system; Matching edge feature points on the running thermal pattern change image with edge positions of the three-dimensional image model, and then mapping the running thermal pattern change image onto the three-dimensional image model; According to the correspondence between the ambient temperature change image and the operating thermal pattern change image in the influence relationship diagram, the ambient temperature change image is connected and bound with the thermal pattern on the three-dimensional image model to obtain a three-dimensional thermal pattern change image model, and the number of the corresponding line detection area and the corresponding time and date are marked.

[0012] Furthermore, the process of establishing the operation anomaly detection decision includes: According to the correspondence between the ambient temperature value and the thermal pattern in the three-dimensional thermal pattern change image model of each line detection area in each time segment, the first mapping deviation threshold and the second mapping deviation threshold are set.

[0013] Furthermore, the process of determining the current state of the line detection area according to the abnormal operation detection decision includes: Collect the real-time laser reflection signal spectrum, real-time ambient temperature change curve and real-time operation thermal pattern change image of each line detection area, and mark the number of the line detection area as well as the current date and time segment; A real-time three-dimensional image model of the corresponding line detection area is established according to the real-time laser reflection signal spectrum, and the average difference between the real-time ambient temperature and the operating temperature in the corresponding time section is obtained according to the real-time ambient temperature change curve and the real-time operation thermal pattern change image; Match the corresponding three-dimensional thermal pattern change image model according to the real-time laser reflection signal spectrum, the real-time ambient temperature change curve, the serial number of the real-time running thermal pattern change image, and the current date and time segment; The real-time three-dimensional image model is overlapped and mapped with the three-dimensional thermal pattern change image model, and the mapping deviation value is compared with the first mapping deviation threshold and the second mapping deviation threshold respectively, and it is judged whether there is any appearance abnormality, slight operation abnormality or severe operation abnormality in the line detection area according to the comparison result.

[0014] Furthermore, the process of obtaining the average difference between the real-time ambient temperature and the operating temperature includes: Divide the time segment into Num time nodes, and then divide the real-time ambient temperature change curve and the real-time running thermal pattern change image into Num real-time ambient temperature nodes and real-time running thermal pattern change nodes according to the time nodes, where Num is a natural number greater than 0; The temperature difference between the real-time ambient temperature node and the real-time running thermal pattern change node at each time node is obtained, and the temperature difference of all time nodes is accumulated and averaged to obtain the mapping deviation value of the corresponding time segment.

[0015] Furthermore, the process of generating monitoring results according to the judgment results includes: When it is determined that the appearance of the line detection area is normal or the operation is normal, no appearance maintenance decision or operation maintenance decision is generated; When it is determined that there is a slight operating abnormality in the line detection area, a corresponding operation and maintenance decision is generated; When it is determined that there is an appearance abnormality or a severe operation abnormality in the line detection area, the use of the circuit line is stopped, and a corresponding appearance maintenance decision or operation maintenance decision is generated; The appearance maintenance decision or the operation maintenance decision is sent to the maintenance personnel until the appearance and operation of the corresponding line detection area are both normal.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention collects laser reflection signal spectra, ambient temperature change curves and operating thermal pattern change images of various line detection areas at various time nodes, establishes a three-dimensional image model according to the laser reflection signal spectrum, and establishes an influence relationship diagram according to the ambient temperature change curve and the operating thermal pattern change image, thereby reducing the detection blind area of ​​circuit line detection to a certain extent. At the same time, the influence relationship diagram is mapped onto the three-dimensional image model to generate a three-dimensional thermal pattern change image model, and an operating abnormality detection decision is set according to the three-dimensional thermal pattern change image model at each time node, thereby improving the intelligence of circuit line detection and the response speed to abnormal conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 The present invention is a flow chart of the method. DETAILED DESCRIPTION

[0019] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention. Example

[0020] like Figure 1 As shown, a circuit line safe operation monitoring method based on digital twins includes the following steps: S1. Divide the circuit into several circuit detection areas, and set multiple sensors for each circuit detection area, so as to collect the laser reflection signal spectrum, ambient temperature change curve and operation thermal pattern change image of each time node in the circuit detection area under normal operation every day; S2. Establish a three-dimensional image model of the corresponding line detection area at each time node according to the laser reflection signal spectrum, and establish an influence relationship diagram of the line detection area according to the ambient temperature change curve and the running thermal pattern change image; S3, mapping the influence relationship diagram onto the three-dimensional image model to obtain a three-dimensional thermal pattern change image model of the line detection area at each time node; S4, setting operation anomaly detection decision according to the three-dimensional thermal pattern change image model at each time node; S5, collecting the real-time laser reflection signal spectrum, real-time ambient temperature change curve and real-time running thermal pattern change image of each line detection area, and judging whether there are abnormalities in the real-time laser reflection signal spectrum, real-time ambient temperature change curve and real-time running thermal pattern change image through abnormality detection decision; S6. Generate a corresponding line maintenance decision according to the judgment result of step S5. Example

[0021] This embodiment is a further limitation of Embodiment 1, and step S1 is implemented by the following process: The circuit is divided into n circuit detection areas, and each circuit detection area is numbered S1 , S 2 ,……,S n , where n is a natural number greater than 0; A temperature sensor, an infrared camera and a laser camera are set for each line detection area, wherein the infrared camera and the laser camera are set just above the line detection area, and the temperature sensor is located at the edge of the line detection area; It should be noted that the temperature sensors, infrared cameras and laser cameras in each line detection area are provided with a time synchronization mechanism. Before the temperature sensors, infrared cameras and laser cameras collect data in the line detection area, time synchronization instructions are sent to each other, and then the temperature sensors, infrared cameras and laser cameras in each line detection area are synchronized according to the time synchronization instructions. The daily time length is divided into H time segments. After the time synchronization is completed, the temperature sensors in each line detection area collect the ambient temperature value to generate the ambient temperature change curve. The infrared camera collects K running thermal pattern change images in the line detection area. The laser camera sends a laser signal to the line detection area. Then, the laser camera generates a laser reflection signal spectrum of the corresponding time segment according to the received laser reflection signal, where K and H are natural numbers greater than 0. It should be noted that the thermal patterns on the thermal pattern distribution image are marked with corresponding temperature values. Example

[0022] This embodiment is a further limitation of Embodiment 1, and Step S2 is implemented by the following process: Generally, the circuit line is composed of a conductor and an insulator, wherein the conductor is generally made of copper, aluminum and other materials, and the insulator is generally made of glass and composite materials. Then, when the laser camera sends a laser signal to the line, the laser signal first passes through the insulator to generate a first laser reflection signal, and when the laser signal passes through the conductor, a second laser emission signal is generated, and then when the laser signal passes through the insulator again and reaches the ground, the first laser reflection signal is generated again; It should be noted that when there is no damage in the circuit line, the first laser reflection signal and the second laser emission signal appear periodically in the laser reflection signal spectrum within any time segment, and then it can be determined whether the wire and the insulator in the circuit line are damaged according to the fluctuation of the first laser reflection signal and the second laser emission signal; Then, according to the time interval between the first laser reflection signal and the second laser reflection signal in the laser reflection signal spectrum and the propagation speed of the laser signal, the thickness of the conductor and the insulator in the circuit line is obtained; Establishing a three-dimensional image model of the corresponding line detection area according to the peak values ​​and valley values ​​in the first laser reflection signal and the second laser reflection signal in the laser reflection signal spectrum; Furthermore, a three-dimensional rectangular coordinate system is established, and the ambient temperature change curves and the operation thermal pattern change images of different years but the same date and the same time period are mapped onto the same three-dimensional rectangular coordinate system; The time segment is divided into several time nodes, and the running thermal pattern change image is mapped on the xy axis plane in the three-dimensional rectangular coordinate system. Then, according to the length and width of the running thermal pattern change image, the ambient temperature change curve is stretched into an ambient temperature change image, and mapped on top of the running thermal pattern change image; The thermal pattern lines on the thermal pattern change image running at the same time node are connected and matched with the ambient temperature change image, and then the influence relationship diagram of each line detection area under each ambient temperature is obtained. Example

[0023] This embodiment is a further limitation of Embodiment 1, and Step S3 is implemented by the following process: Setting a three-dimensional coordinate system, setting a number of edge feature points on the running thermal pattern change image in the influence relationship diagram, and then mapping the three-dimensional image model of the line detection area and the running thermal pattern image on the three-dimensional coordinate system; Matching edge feature points on the running thermal pattern change image with edge positions of the three-dimensional image model, and then mapping the running thermal pattern change image onto the three-dimensional image model; According to the correspondence between the ambient temperature change image and the operating thermal pattern change image in the influence relationship diagram, the ambient temperature change image is connected and bound with the thermal pattern on the three-dimensional image model to obtain a three-dimensional thermal pattern change image model, and the number of the corresponding line detection area and the corresponding time and date are marked. Example

[0024] This embodiment is a further limitation of Embodiment 1, and step S4 is implemented by the following process: According to the correspondence between the ambient temperature value and the thermal pattern in the three-dimensional thermal pattern change image model of each line detection area in each time segment within the time date, the first mapping deviation threshold and the second mapping deviation threshold are set. Example

[0025] This embodiment is a further limitation of Embodiment 1, and step S5 is implemented by the following process: After the temperature sensors, infrared cameras and laser cameras in each line detection area are synchronized, the real-time laser reflection signal spectrum, real-time ambient temperature change curve and real-time operation thermal pattern change image of the line detection area are collected, and the number of the line detection area and the current date and time segment are marked; A real-time three-dimensional image model of the corresponding line detection area is established according to the real-time laser reflection signal spectrum, and the average difference between the real-time ambient temperature and the operating temperature in the corresponding time section is obtained according to the real-time ambient temperature change curve and the real-time operation thermal pattern change image; The process of obtaining the average difference between the real-time ambient temperature and the operating temperature includes: Divide the time segment into Num time nodes, and then divide the real-time ambient temperature change curve and the real-time running thermal pattern change image into Num real-time ambient temperature nodes and real-time running thermal pattern change nodes according to the time nodes, where Num is a natural number greater than 0; Obtain the temperature difference between the real-time ambient temperature node and the real-time running thermal pattern change node at each time node, accumulate and average the temperature differences of all time nodes, and obtain the mapping deviation value of the corresponding time segment; Match the corresponding three-dimensional thermal pattern change image model according to the real-time laser reflection signal spectrum, the real-time ambient temperature change curve, the serial number of the real-time running thermal pattern change image, and the current date and time segment; Overlap the real-time 3D image model with the 3D thermal pattern change image model. If the difference between the two is greater than 5%, it is determined that the corresponding line inspection area has appearance defects. If the difference between the two is within 5%, the appearance of the corresponding line detection area is judged to be normal; Furthermore, if the mapping deviation value is less than or equal to the first mapping deviation threshold, it is determined that the corresponding line detection area operates normally. If the mapping deviation value is greater than the first mapping deviation threshold value and less than or equal to the second mapping deviation threshold value, it is determined that there is a slight operation abnormality in the corresponding line detection area; If the mapping deviation value is greater than the second mapping deviation threshold, it is determined that a severe operation abnormality exists in the corresponding line detection area. Example

[0026] This embodiment is a further limitation of Embodiment 1, and step S6 is implemented by the following process: When the line detection area has a normal appearance or normal operation, no appearance maintenance decision or operation maintenance decision is generated; When there is a slight operational abnormality in the line detection area, a corresponding operation and maintenance decision is generated; When there is an appearance abnormality or a serious operation abnormality in the line detection area, the circuit line is stopped from being used, and a corresponding appearance maintenance decision or operation maintenance decision is generated; The appearance maintenance decision or the operation maintenance decision is sent to the maintenance personnel until the appearance and operation of the corresponding line detection area are both normal.

[0027] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A circuit line safe operation monitoring method based on digital twin, characterized in that: The following steps are involved: S1. Divide the circuit into several circuit detection areas, and set multiple sensors for each circuit detection area, so as to collect the laser reflection signal spectrum, ambient temperature change curve and operation thermal pattern change image of each time node in the circuit detection area under normal operation every day; S2. Establish a three-dimensional image model of the corresponding line detection area at each time node according to the laser reflection signal spectrum, and establish an influence relationship diagram of the line detection area according to the ambient temperature change curve and the running thermal pattern change image; S3, mapping the influence relationship diagram onto the three-dimensional image model to obtain a three-dimensional thermal pattern change image model of the line detection area at each time node; S4, setting operation anomaly detection decision according to the three-dimensional thermal pattern change image model at each time node; S5, collecting the real-time laser reflection signal spectrum, real-time ambient temperature change curve and real-time running thermal pattern change image of each line detection area, and judging whether there are abnormalities in the real-time laser reflection signal spectrum, real-time ambient temperature change curve and real-time running thermal pattern change image through abnormality detection decision; S6. Generate a corresponding line maintenance decision according to the judgment result of step S5.

2. According to a method for monitoring safe operation of a circuit line based on digital twins according to claim 1, it is characterized in that: The acquisition process of the laser reflection signal spectrum, the ambient temperature change curve and the running thermal pattern change image includes: Divide the circuit into several circuit detection areas, set a number for each circuit detection area, and set a temperature sensor, an infrared camera and a laser camera for each circuit detection area; The daily time length is divided into H time segments, and the temperature sensors in each line detection area collect the ambient temperature values ​​in each time segment to generate an ambient temperature change curve. The infrared camera collects several running thermal pattern change images in the line detection area, and the laser camera sends a laser signal to the line detection area. The laser camera generates a laser reflection signal spectrum of the corresponding time segment according to the received laser reflection signal. The thermal patterns on the thermal pattern distribution image are marked with corresponding temperature values, and H is a natural number greater than 0.

3. According to a method for monitoring safe operation of a circuit line based on digital twins according to claim 2, it is characterized in that: The process of establishing the three-dimensional image model of the line detection area includes: When the laser camera sends a laser signal to the line, the laser signal first passes through the insulator to generate a first laser reflection signal, and then generates a second laser emission signal when the laser signal passes through the wire. Then, when the laser signal passes through the insulator again and reaches the ground, the first laser reflection signal is generated again. According to the time interval between the first laser reflection signal and the second laser reflection signal in the laser reflection signal spectrum and the propagation speed of the laser signal, the thickness of the wire and the insulator in the circuit line is obtained, and then a three-dimensional image model of the circuit detection area is established and marked with corresponding numbers.

4. A circuit line safe operation monitoring method based on digital twin according to claim 3, characterized in that: The process of establishing the influence relationship diagram includes: Establish a three-dimensional rectangular coordinate system, and map the ambient temperature change curves and operation thermal pattern change images of different years but the same date and the same time period onto the same three-dimensional rectangular coordinate system; The time segment is divided into several time nodes, and the running thermal pattern change image is mapped on the xy axis plane in the three-dimensional rectangular coordinate system. Then, according to the length and width of the running thermal pattern change image, the ambient temperature change curve is stretched into an ambient temperature change image, and mapped on top of the running thermal pattern change image; The thermal pattern lines on the thermal pattern change image running at the same time node are connected and matched with the ambient temperature change image, and then the influence relationship diagram of each line detection area under each ambient temperature is obtained.

5. A circuit line safe operation monitoring method based on digital twin according to claim 4, characterized in that: The process of establishing the three-dimensional thermal pattern change image model includes: Setting a three-dimensional coordinate system, setting a number of edge feature points on the running thermal pattern change image in the influence relationship diagram, and then mapping the three-dimensional image model of the line detection area and the running thermal pattern image on the three-dimensional coordinate system; Matching edge feature points on the running thermal pattern change image with edge positions of the three-dimensional image model, and then mapping the running thermal pattern change image onto the three-dimensional image model; According to the correspondence between the ambient temperature change image and the operating thermal pattern change image in the influence relationship diagram, the ambient temperature change image is connected and bound with the thermal pattern on the three-dimensional image model to obtain a three-dimensional thermal pattern change image model, and the number of the corresponding line detection area and the corresponding time and date are marked.

6. A circuit line safe operation monitoring method based on digital twin according to claim 5, characterized in that: The process of establishing the operation anomaly detection decision includes: According to the correspondence between the ambient temperature value and the thermal pattern in the three-dimensional thermal pattern change image model of each line detection area in each time segment, the first mapping deviation threshold and the second mapping deviation threshold are set.

7. A circuit line safe operation monitoring method based on digital twin according to claim 6, characterized in that: The process of judging the current state of the line detection area according to the operation abnormality detection decision includes: Collect the real-time laser reflection signal spectrum, real-time ambient temperature change curve and real-time operation thermal pattern change image of each line detection area, and mark the number of the line detection area as well as the current date and time segment; A real-time three-dimensional image model of the corresponding line detection area is established according to the real-time laser reflection signal spectrum, and the average difference between the real-time ambient temperature and the operating temperature in the corresponding time section is obtained according to the real-time ambient temperature change curve and the real-time operation thermal pattern change image; Match the corresponding three-dimensional thermal pattern change image model according to the real-time laser reflection signal spectrum, the real-time ambient temperature change curve, the serial number of the real-time running thermal pattern change image, and the current date and time segment; The real-time three-dimensional image model is overlapped and mapped with the three-dimensional thermal pattern change image model, and the mapping deviation value is compared with the first mapping deviation threshold and the second mapping deviation threshold respectively, and it is judged whether there is any appearance abnormality, slight operation abnormality or severe operation abnormality in the line detection area according to the comparison result.

8. The method for monitoring safe operation of a circuit line based on digital twins according to claim 7 is characterized in that: The process of obtaining the average difference between the real-time ambient temperature and the operating temperature includes: Divide the time segment into Num time nodes, and then divide the real-time ambient temperature change curve and the real-time running thermal pattern change image into Num real-time ambient temperature nodes and real-time running thermal pattern change nodes according to the time nodes, where Num is a natural number greater than 0; The temperature difference between the real-time ambient temperature node and the real-time running thermal pattern change node at each time node is obtained, and the temperature difference of all time nodes is accumulated and averaged to obtain the mapping deviation value of the corresponding time segment.

9. The method for monitoring safe operation of a circuit line based on digital twins according to claim 7, characterized in that: The process of generating monitoring results based on the judgment results includes: When it is determined that the appearance of the line detection area is normal or the operation is normal, no appearance maintenance decision or operation maintenance decision is generated; When it is determined that there is a slight operating abnormality in the line detection area, a corresponding operation and maintenance decision is generated; When it is determined that there is an appearance abnormality or a severe operation abnormality in the line detection area, the use of the circuit line is stopped, and a corresponding appearance maintenance decision or operation maintenance decision is generated; The appearance maintenance decision or the operation maintenance decision is sent to the maintenance personnel until the appearance and operation of the corresponding line detection area are both normal.

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