Intelligent cable monitoring system

Abstract

An intelligent cable monitoring system comprises an information acquisition unit which detects temperature data and circulation data at the position of a cable and transmits the detected temperature data and circulation data to an information processing unit; the information processing unit respectively processes the temperature data and the circulation data transmitted by the information acquisition unit, determines the abnormal type of the detected temperature data after completing abnormal value processing on the data, and respectively generates a temperature early warning signal I and a temperature early warning signal II; judging and detecting the abnormal type of the circulating current data, and respectively generating a circulating current early warning signal I and a circulating current early warning signal II; then, the generated early warning signal is transmitted to an early warning warning unit; and the early warning and warning unit is used for receiving the warning signal transmitted by the information processing unit and executing corresponding warning operation. The intelligent cable monitoring system provided by the invention can monitor the temperature and improve the capability of judging faults outside the cable.

Description

Technical Field

[0001] The present invention relates to an aluminum-magnesium alloy cable connection bracket, and particularly to an intelligent cable monitoring system. Background Art

[0002] Traditional cable temperature monitoring means are often too simple, mostly single-point measurement or measurement at a limited number of points, and it is impossible to comprehensively obtain the temperature distribution along the cable; this makes it difficult to detect and locate problem points in time when the cable has local overheating; the existing technology has limited monitoring accuracy for cable circulating current, it is difficult to capture small but potentially indicative circulating current changes of potential faults, and there is a lack of effective algorithms and models when determining the relationship between abnormal circulating current and cable faults; when the circulating current is abnormal, it is impossible to accurately judge the cause of external cable faults.

[0003] In addition, an aluminum-magnesium alloy cable connection bracket is a device for supporting and fixing cables, usually made of aluminum-magnesium alloy material. Aluminum-magnesium alloy has the advantages of light weight, high strength, corrosion resistance, etc., and is suitable for fields such as electric power, communication, and construction;

[0004] When the existing aluminum-magnesium alloy cables are in use, the cables will be placed on the aluminum-magnesium alloy cable connection brackets, and the cables themselves are relatively heavy, which easily causes the positions far from the connection of the aluminum-magnesium alloy cable connection brackets to be crushed by the cables, affecting the use of the aluminum-magnesium alloy cable connection brackets and further reducing the service life of the aluminum-magnesium alloy cable connection brackets. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an intelligent cable monitoring system that can monitor temperature and improve the ability to judge external cable faults.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is:

[0007] An intelligent cable monitoring system includes a controller, and an intelligent control module is further provided inside the controller. The intelligent control module includes an information acquisition unit, an information processing unit, and a warning and alarm unit;

[0008] The information acquisition unit detects the temperature data and circulating current data at the cable position, and transmits the detected temperature data and circulating current data to the information processing unit;

[0009] The information processing unit processes the temperature data and circulating current data transmitted by the information acquisition unit respectively. After processing the abnormal values of the data, it determines the types of abnormal detected temperature data, and generates a temperature warning signal one and a temperature warning signal two respectively; determines the types of abnormal detected circulating current data, and generates a circulating current warning signal one and a circulating current warning signal two respectively; then, transmits the generated warning signals to the warning and alarm unit;

[0010] The early warning alarm unit receives the alarm signal transmitted by the information processing unit and performs corresponding alarm operations.

[0011] The information processing unit performs abnormal value determination, including the following steps:

[0012] M1: After the cable has been running for a period of time, a temperature monitoring point is set at a set distance on the cable surface, and the cable temperature is detected at the temperature monitoring point. Then, the detected temperature data is sorted according to the collection time through the information processing unit in the intelligent control module;

[0013] M2: Calculate the mean A and standard deviation B of the detected temperature data for a temperature data collected at the same time, and then use the calculated mean A and standard deviation B to establish the fluctuation range of the detected temperature data, the fluctuation range of the detected temperature data is [A-2B, A+2B], and the detected temperature data that is not within the fluctuation range of the detected temperature data is determined as a detected abnormal value, and the abnormal value is marked and counted, and the count is b;

[0014] M3: If the preset temperature comparison threshold The detected temperature data is determined to be abnormal, and the temperature data is re-detected. If, after the re-detected temperature data is analyzed, the proportion of abnormal values ​​in the detected temperature data is still greater than the preset temperature comparison threshold, the detected position is determined to be a temperature abnormality point;

[0015] M4: If the preset temperature comparison threshold It is determined that the detection position is not a part prone to heat, and the detection position is moved backward by a distance X, where X is the diameter data of the temperature range that the temperature sensor can monitor.

[0016] The information processing unit analyzes the temperature data, including the following steps:

[0017] S1: Detect the temperature data at multiple locations within a set range near the cable, remove the abnormal temperature data and calculate the average value, and use the calculated average value as the ambient temperature data T at the temperature measurement point HJ ;

[0018] S2: The temperature data detected at the cable temperature measurement point is T DL , compare the cable temperature with the ambient temperature. If T DL >T HJ , then the actual temperature data of the cable is determined to be T1 = T DL +T HJ If T DL <T HJ , then the actual temperature data of the cable is determined to be T1 = T DL -T HJ ;

[0019] S3: Calculate the temperature data detected at each cable measurement point, calculate the actual cable temperature data corresponding to the detected temperature data, establish a coordinate system of the actual cable temperature data and the acquisition time, plot and connect the corresponding coordinate points within the coordinate system, and then calculate the slope of the connected line segment.

[0020] S4: If the slope of the connected line segment is greater than the preset slope threshold, it is determined that the temperature data at the temperature measurement point has a large increase, and there may be a poor contact situation. Generate a temperature warning signal 1 and transmit the temperature warning signal 1 to the warning unit.

[0021] S5: If the slope of the connected line segment is less than the preset slope threshold, compare the temperature data corresponding to the right end of the connected line segment with the preset temperature threshold. If the temperature data corresponding to the right end of the line segment is greater than the preset temperature threshold, generate a temperature warning signal 2 and transmit the temperature warning signal 2 to the warning unit.

[0022] The analysis of the circulating current data by the information processing unit includes the following steps:

[0023] K1: Eliminate the outliers of the detected data from the circulating current data detected at the same time point of the circulating current measurement point. Based on the mean value of the remaining detected circulating current data as the detected circulating current data at this time point, and then sort the detected circulating current data in the order of the acquisition time.

[0024] K2: Calculate the mean value of the detected circulating current data within the set time period, and then compare the difference between the other detected circulating current data within the set time period and the calculated circulating current mean value. If the absolute value of the calculated difference is greater than the preset circulating current difference threshold, mark the detected circulating current data greater than the preset circulating current difference threshold as abnormal circulating current data.

[0025] K3: Calculate the interval time period between each abnormal circulating current data and the adjacent abnormal circulating current data. If the interval time periods corresponding to the adjacent abnormal circulating current data are the same, and the fluctuation amplitude of the adjacent abnormal circulating current data is within the set fluctuation amplitude range, and it is determined that the cable has an outer layer breakage situation, then judge the influence of environmental corrosion.

[0026] The analysis of the influence of environmental corrosion by the information processing unit includes the following steps:

[0027] N1: The cable corrosion rate R = c1 * HJ SD + c2 * (PH - 7) 2 + c3 * (T HJ - T0), where c1, c2, and c3 are the weight coefficients corresponding to the environmental humidity, PH value, and environmental temperature data respectively, HJ SD is the environmental humidity data, and T0 is the reference temperature at which the outer layer material of the cable is least likely to corrode.

[0028] N2: Divide the thickness data of the cable outer layer by the cable corrosion rate to obtain the corrosion time. Compare the corrosion time with the laying time. If it is determined that the damage to the cable outer layer is caused by corrosion, generate a first loop current warning signal, and transmit the first loop current warning signal to the warning unit; otherwise, detect the grounding resistance of the corresponding loop current measurement point. If it is detected that the grounding resistance exceeds the standard value and the loop current amplitude also exceeds the standard value, it is determined that there is a grounding fault at the corresponding loop current measurement point, generate a second loop current warning signal, and transmit the second loop current warning signal to the warning unit.

[0029] The steps for the warning unit to perform a warning operation are as follows:

[0030] P1: After receiving the first temperature warning signal, the warning light corresponding to the temperature on the controller lights up, the number of the corresponding temperature measurement point is displayed on the display screen, the buzzer module inside the controller emits a buzzer warning, and the first color number light among the three-color indicator lights set on the controller lights up, informing the staff that there may be a poor contact at the cable detection position corresponding to the number;

[0031] P2: After receiving the second temperature warning signal, the warning light corresponding to the temperature on the controller lights up, the number of the corresponding temperature measurement point is displayed on the display screen, the buzzer module inside the controller emits a buzzer warning, and the second color number light among the three-color indicator lights set on the controller lights up, informing the staff that the temperature at the cable detection position corresponding to the number is abnormal;

[0032] P3: After receiving the first loop current warning signal, the warning light corresponding to the loop current on the controller lights up, the number of the corresponding loop current measurement point is displayed on the display screen, the buzzer module inside the controller emits a buzzer warning, and the first color number light among the three-color indicator lights set on the controller lights up, informing the staff that there may be a corrosion and breakage at the cable detection position corresponding to the number;

[0033] P4: After receiving the second loop current warning signal, the warning light corresponding to the loop current on the controller lights up, the number of the corresponding loop current measurement point is displayed on the display screen, the buzzer module inside the controller emits a buzzer warning, and the second color number light among the three-color indicator lights set on the controller lights up, informing the staff that there may be a grounding fault at the cable detection position corresponding to the number;

[0034] P5: After the warning signal is transmitted, start timing the response time. If there is no response within the set time period, send a warning text message to the mobile phone numbers of the pre-set relevant maintenance personnel and management personnel through the SMS platform. The content of the text message includes the location of the abnormal cable and the specific abnormal parameter values, so that the relevant personnel can know the situation in the first time and take corresponding measures.

[0035] The controller is installed on an aluminum-magnesium alloy cable connection frame. The aluminum-magnesium alloy cable connection frame includes a mounting plate, on which a U-shaped frame is installed. Along the length direction of the U-shaped frame, a plurality of brackets are installed, and the lower end of each bracket is supported by a support member; the controller is installed on the bracket.

[0036] The support member includes a hinge seat one fixed inside the U-shaped frame and a hinge seat two fixed on the bottom surface of the bracket. A hinge head one is rotatably provided on the hinge seat one, and a screw one is fixed at the other end of the hinge head one. A hinge head two is rotatably provided on the hinge seat two, and a screw two is fixed at the other end of the hinge head two. The screw one and the screw two are threadedly connected to a connecting member.

[0037] The connecting member is a threaded sleeve and the threads of the left and right two sections inside are opposite in rotation direction.

[0038] The bracket is connected to the U-shaped frame through fixing bolts and nuts.

[0039] The mounting plate is fixed in the cable well through locking bolts.

[0040] The present invention provides a cable intelligent monitoring system, having the following technical effects:

[0041] 1), By adopting a multi-point distributed monitoring method, temperature monitoring points are set at regular intervals along the surface of the cable, so as to comprehensively obtain the temperature distribution of the cable along the line and avoid missing local overheating problems; in the temperature data analysis, the influence of environmental factors is fully considered. By detecting the temperature data at multiple positions within a set range near the cable, the mean value is calculated after removing the outliers as the environmental temperature, and then compared with the cable temperature measurement value to determine the actual temperature data of the cable; this precise temperature analysis method greatly improves the accuracy of temperature monitoring and effectively avoids misjudgment caused by environmental factors; at the same time, by establishing a coordinate system of the actual temperature data of the cable and the acquisition time, calculating the slope of the connecting line segment, and comparing it with the preset slope threshold and the preset temperature threshold, it is possible to accurately judge whether there is poor contact or other temperature anomalies in the cable, providing strong support for timely discovery of potential faults.

[0042] 2), By selecting current transformers with appropriate specifications and accuracies, ensuring tight fit and correct polarity connection with the cable metal sheath or grounding wire, the accuracy of circulating current data acquisition is guaranteed; in terms of circulating current data processing and fault determination, by removing outliers from the circulating current data at the same time point, calculating the mean value within a set time period, and comparing the other data with it, marking the abnormal data, and then combining the interval time period and the fluctuation amplitude of adjacent abnormal data to judge whether the outer layer of the cable is damaged; this refined analysis method effectively improves the accuracy of circulating current monitoring, can accurately distinguish circulating current anomalies caused by different reasons, greatly improves the accuracy of fault diagnosis, and provides a reliable basis for cable maintenance.

[0043] 3), by using an aluminum-magnesium alloy cable connecting frame to support the cable, and the aluminum-magnesium alloy cable connecting frame is provided with a support member, so as to prevent the outer end of the bracket from being crushed due to placing too many cables, thereby improving the service life and stability of the bracket, and facilitating the support of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The present invention will be further described below in conjunction with the drawings and embodiments:

[0045] Figure 1 It is a structural schematic diagram of the present invention (first perspective).

[0046] Figure 2 It is a structural schematic diagram of the present invention (second perspective).

[0047] Figure 3 It is a cross-sectional view of the present invention.

[0048] Figure 4 It is a system flow chart of the present invention.

[0049] In the figure: mounting plate 1, U-shaped frame 2, fixing bolt 3, bracket 4, second screw 5, connecting member 6, controller 7, nut 8, first hinge seat 9, first hinge head 10, first screw 11, second hinge seat 12. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0050] As Figures 1-4 shown, an aluminum-magnesium alloy cable connecting frame includes a mounting plate 1. A U-shaped frame 2 is provided on the mounting plate 1. A plurality of brackets 4 are evenly arranged in the U-shaped frame 2. The brackets 4 are made of aluminum-magnesium alloy material and are used to support the cable. A controller 7 is provided on the bracket 4, and the controller 7 has functions of detecting temperature, circulating current, electromagnetic field and cable side pressure, and also has functions such as data remote transmission and early warning.

[0051] A support member for supporting the bracket 4 is provided in the U-shaped frame 2. By using the support member, it is convenient to support the bracket 4 and improve the stability of the bracket 4.

[0052] In the present invention, the support member includes a first hinge seat 9 fixedly connected in the U-shaped frame 2 and a second hinge seat 12 fixedly connected to the bottom surface of the bracket 4. A first hinge head 10 is rotatably arranged in the first hinge seat 9, and a first screw 11 is fixedly connected to the first hinge head 10. A second hinge head is rotatably arranged in the second hinge seat 12, and a second screw 5 is fixedly connected to the second hinge head. The second screw 5 has a right-handed thread, and the first screw 11 has a left-handed thread. The connecting member 6 is a threaded sleeve and the internal threads of the left and right sections have opposite thread directions. The second screw 5 and the first screw 11 are threadedly connected to the connecting member 6. When the connecting member 6 is rotated, the second screw 5 and the first screw 11 move relatively closer or farther away. The second screw 5, the first screw 11 and the connecting member 6 constitute the support member, and the support member is used to support the bracket 4.

[0053] When installing the cable connection frame, first install the bracket 4 in the U-shaped frame 2 through the fixing bolts 3 and nuts 8, and then screw the first screw 11 and the second screw 5 into the connecting piece 6. Through the connecting piece 6, the second screw 5 and the first screw 11 are connected together and are distributed in a triangular shape with the bracket 4, so as to facilitate the support of the bracket 4 and improve the stability of the bracket 4.

[0054] When disassembling, reverse-rotate the connecting piece 6, and the first screw 11 and the second screw 5 move relatively away and disengage from the connecting piece 6.

[0055] In the present invention, threaded holes one are symmetrically formed on the U-shaped frame 2, and threaded holes two matching with the threaded holes one are formed on the bracket 4. Fixing bolts 3 are arranged in the threaded holes one and the threaded holes two. One end of each fixing bolt 3 is provided with a nut 8. By the mutual cooperation of the fixing bolts 3 and the nuts 8, it is convenient to install the bracket 4 in the U-shaped frame 2, and at the same time, it is also convenient to disassemble the bracket 4, so as to facilitate the installation or replacement of the bracket 4.

[0056] In the present invention, a plurality of circular holes are formed on the mounting plate 1, and locking bolts are arranged in the circular holes. By using the locking bolts, it is convenient to install the cable connection frame in the cable well, and the circular holes on each mounting plate 1 are the same, which is convenient for installation and disassembly.

[0057] The cable is placed between the two brackets 4. During the forward and reverse rotation of the connecting piece 6, the inclination angle of the bracket 4 is adjusted to rotate, and the cable placed between the two brackets 4 is clamped; a controller 7 is installed on each bracket 4, and the intelligent control module inside the controller 7 collects information on the cable between the two brackets 4 at the corresponding position.

[0058] An intelligent control module is also arranged inside the controller 7, and the intelligent control module includes an information collection unit, an information processing unit and a warning unit.

[0059] After the cable runs for a period of time, a temperature monitoring point is set at a set distance on the surface of the cable at intervals (the temperature is monitored by a temperature sensor with the model MFP-8). The temperature of the cable is detected at the temperature monitoring point position, and then the detected temperature data is sorted according to the collection time by the information processing unit in the intelligent control module; the average value A and the standard deviation B of the detected temperature data are calculated for a temperature data collected at the same time, and then the fluctuation range of the detected temperature data is set with the calculated average value A and standard deviation B, and the detected temperature data fluctuation range is [A - 2B, A + 2B]. The detected temperature data not within the detected temperature data fluctuation range is determined as a detected abnormal value, and the abnormal value is marked and counted abnormally, and the count is b; if the preset temperature comparison threshold If the detected temperature data is determined to be abnormal, the temperature data is re-detected. If the proportion of abnormal values ​​in the detected temperature data is still greater than the preset temperature comparison threshold after the re-detected temperature data is analyzed, the detected location is determined to be a temperature abnormal location. If the preset temperature comparison threshold is It is determined that the detection position is not a heat-prone part, and the detection position is moved backward by a distance X, where X is the diameter data of the temperature range that the temperature sensor can monitor;

[0060] After each temperature sensor completes the temperature detection within the set distance, install the temperature sensor at locations prone to heating problems, such as cable joints and cable-dense areas. During installation, ensure that the temperature sensor is in close contact with the cable sheath, and use thermal conductive silicone to assist in fitting to reduce temperature measurement errors; mark the temperature sensor detection location as the temperature measurement point;

[0061] The temperature data at multiple locations within the set range near the cable are detected, and the average value is calculated after the abnormal temperature data is eliminated. The calculated average value is used as the ambient temperature data T at the temperature measurement point. HJ ; The temperature data detected at the cable temperature measurement point is T DL , compare the cable temperature with the ambient temperature. If T DL >T HJ , then the actual temperature data of the cable is determined to be T1 = T DL +T HJ ; If T DL <T HJ , then the actual temperature data of the cable is determined to be T1 = T DL -T HJ ; Calculate the temperature data detected at each cable measurement point, and calculate the actual temperature data of the cable corresponding to the detected temperature data, establish a coordinate system of the actual temperature data of the cable and the acquisition time, draw and connect the corresponding coordinate points in the coordinate system, and then calculate the slope of the connecting line segment; if the slope of the connecting line segment is greater than the preset slope threshold, it is determined that the temperature data of the temperature measurement point has increased significantly, and there may be poor contact, and a temperature warning signal 1 is generated, and the temperature warning signal 1 is transmitted to the warning alarm unit; if the slope of the connecting line segment is less than the preset slope threshold, the temperature data corresponding to the right end of the connecting line segment is compared with the preset temperature threshold. If the temperature data corresponding to the right end of the line segment is greater than the preset temperature threshold, a temperature warning signal 2 is generated, and the temperature warning signal 2 is transmitted to the warning alarm unit.

[0062] Select current transformers with appropriate specifications and accuracies and install them at corresponding monitoring positions. During installation, ensure that the current transformers are closely attached to the metal sheath or grounding wire of the cable to be detected, and ensure that the polarity connections of the current transformers are correct to avoid measurement result deviations caused by incorrect polarity. Eliminate outliers from the detected circulating current data at the same time point of the circulating current measurement points. Based on the mean value of the remaining detected circulating current data, use it as the detected circulating current data at this time point, and then sort the detected circulating current data in the order of acquisition time. Calculate the mean value of the detected circulating current data within the set time period. Finally, compare the difference between other detected circulating current data within the set time period and the calculated circulating current mean value. If the absolute value of the calculated difference is greater than the preset circulating current difference threshold, mark the detected circulating current data greater than the preset circulating current difference threshold as abnormal circulating current data. Calculate the interval time period between each abnormal circulating current data and the adjacent abnormal circulating current data. If the interval time periods corresponding to adjacent abnormal circulating current data are the same, and the fluctuation amplitudes of adjacent abnormal circulating current data are within the set fluctuation amplitude range, and it is determined that there is damage to the outer layer of the cable, then judge the influence of environmental corrosion.

[0063] The cable corrosion rate R = c1 * HJ SD + c2 * (PH - 7) 2 + c3 * (T HJ - T0);

[0064] Where: c1, c2, and c3 are the weight coefficients corresponding to environmental humidity, pH value, and environmental temperature data respectively. PH is the pH value, HJ SD is the environmental humidity data, and T0 is the reference temperature at which the outer layer material of the cable is least prone to corrosion.

[0065] Then, divide the thickness data of the cable outer layer by the cable corrosion rate to obtain the corrosion time, and compare the corrosion time with the laying time. If it is determined that the damage to the outer layer of the cable is caused by corrosion, generate a circulating current warning signal 1 and transmit the circulating current warning signal 1 to the warning and alarm unit; otherwise, detect the grounding resistance of the corresponding circulating current measurement point. If the detected grounding resistance exceeds the standard value and the circulating current amplitude also exceeds the standard value, it is determined that there is a grounding fault at the corresponding circulating current measurement point, generate a circulating current warning signal 2, and transmit the circulating current warning signal 2 to the warning and alarm unit.

Claims

1. A cable intelligent monitoring system, characterized in that: The controller includes an intelligent control module, which includes an information collection unit, an information processing unit and an early warning unit. The information acquisition unit detects the temperature data and circulation data at the cable position, and transmits the detected temperature data and circulation data to the information processing unit; The information processing unit processes the temperature data and circulation data transmitted by the information collection unit respectively, and after completing the abnormal value processing of the data, determines the type of abnormal temperature data detected, and generates temperature warning signal 1 and temperature warning signal 2 respectively; determines the type of abnormal circulation data detected, and generates circulation warning signal 1 and circulation warning signal 2 respectively; then, transmits the generated warning signal to the warning alarm unit; The early warning alarm unit receives the alarm signal transmitted by the information processing unit and performs corresponding alarm operations.

2. The intelligent cable monitoring system according to claim 1, characterized in that: The information processing unit performs abnormal value determination, including the following steps: M1: After the cable has been running for a period of time, a temperature monitoring point is set at a set distance on the cable surface, and the cable temperature is detected at the temperature monitoring point. Then, the detected temperature data is sorted according to the collection time through the information processing unit in the intelligent control module; M2: Calculate the mean A and standard deviation B of the detected temperature data for a temperature data collected at the same time, and then use the calculated mean A and standard deviation B to establish the fluctuation range of the detected temperature data, the fluctuation range of the detected temperature data is [A-2B, A+2B], and the detected temperature data that is not within the fluctuation range of the detected temperature data is determined as a detected abnormal value, and the abnormal value is marked and counted, and the count is b; M3: If the preset temperature comparison threshold The detected temperature data is determined to be abnormal, and the temperature data is re-detected. If, after the re-detected temperature data is analyzed, the proportion of abnormal values ​​in the detected temperature data is still greater than the preset temperature comparison threshold, the detected position is determined to be a temperature abnormality location; M4: If the preset temperature comparison threshold It is determined that the detection position is not a part prone to heat, and the detection position is moved backward by a distance X, where X is the diameter data of the temperature range that the temperature sensor can monitor.

3. The intelligent cable monitoring system according to claim 2, characterized in that: The information processing unit analyzes the temperature data, including the following steps: S1: Detect the temperature data at multiple locations within a set range near the cable, remove the abnormal temperature data and calculate the average value, and use the calculated average value as the ambient temperature data T at the temperature measurement point HJ ; S2: The temperature data detected at the cable temperature measurement point is T DL , compare the cable temperature with the ambient temperature. If T DL >T HJ , then the actual temperature data of the cable is determined to be T1 = T DL +T HJ ; If T DL <T HJ , then the actual temperature data of the cable is determined to be T1 = T DL -T HJ ; S3: Calculate the temperature data detected at each cable measurement point, and calculate the actual cable temperature data corresponding to the detected temperature data, establish a coordinate system of the actual cable temperature data and the acquisition time, draw and connect the corresponding coordinate points in the coordinate system, and then calculate the slope of the connecting line segment; S4: If the slope of the connecting line segment is greater than a preset slope threshold, it is determined that the temperature data of the temperature measurement point has increased significantly, and there may be a poor contact situation, and a temperature warning signal 1 is generated and transmitted to the warning alarm unit; S5: If the slope of the connecting line segment is less than the preset slope threshold, the temperature data corresponding to the right end of the connecting line segment is compared with the preset temperature threshold. If the temperature data corresponding to the right end of the line segment is greater than the preset temperature threshold, a second temperature warning signal is generated and transmitted to the warning unit.

4. The intelligent cable monitoring system according to claim 3, characterized in that: The information processing unit analyzes the circulation data, including the following steps: K1: Remove abnormal values ​​from the circulation data detected at the same time point of the circulation measurement point, take the mean value of the remaining detected circulation data as the detected circulation data at that time point, and then sort the detected circulation data according to the order of collection time; K2: Calculate the mean of the detected circulation data within the set time period, and then compare the difference between other detected circulation data within the set time period and the calculated circulation mean. If the calculated difference absolute value is greater than the preset circulation difference threshold, the detected circulation data greater than the preset circulation difference threshold is marked as abnormal circulation data; K3: Calculate the interval time period between each abnormal circulation data and the adjacent abnormal circulation data. If the interval time periods corresponding to the adjacent abnormal circulation data are the same, and the fluctuation amplitude of the adjacent abnormal circulation data is within the set fluctuation amplitude range, and it is determined that the outer layer of the cable is damaged, then judge the impact of environmental corrosion.

5. The intelligent cable monitoring system according to claim 4, characterized in that: The information processing unit performs analysis of the environmental corrosion impact, including the following steps: N1: Cable corrosion rate R = c1*HJ SD +c2*(PH-7) 2 +c3*(T HJ -T0), c1, c2 and c3 are weight coefficients corresponding to ambient humidity, pH value and ambient temperature data, HJ SD is the environmental humidity data, T0 is the reference temperature at which the cable outer material is least susceptible to corrosion; N2: The corrosion time is obtained by dividing the cable outer layer thickness data by the cable corrosion rate. The corrosion time is compared with the laying time. If It is determined that the damage to the outer layer of the cable is caused by corrosion, and a circulating current warning signal 1 is generated, and the circulating current warning signal 1 is transmitted to the early warning alarm unit; otherwise, the grounding resistance of the corresponding circulating current measurement point is detected. If the grounding resistance is detected to exceed the standard value and the circulating current amplitude also exceeds the standard value, it is determined that there is a grounding fault at the corresponding circulating current measurement point, and a circulating current warning signal 2 is generated, and the circulating current warning signal 2 is transmitted to the early warning alarm unit.

6. The intelligent cable monitoring system according to claim 5, characterized in that: The steps for the early warning unit to perform early warning operations are as follows: P1: After receiving the temperature warning signal 1, the warning light corresponding to the temperature on the controller (7) lights up, the number of the corresponding temperature measurement point is displayed on the display screen, the buzzer module inside the controller (7) emits a buzzer warning, and the first color number light of the three-color indicator light set on the controller (7) lights up, informing the staff that there may be a poor contact at the corresponding numbered cable detection position; P2: After receiving the second temperature warning signal, the warning light corresponding to the temperature on the controller (7) lights up, the number of the corresponding temperature measurement point is displayed on the display screen, the buzzer module inside the controller (7) emits a buzzer warning, and the second color number light of the three-color indicator light set on the controller (7) lights up, informing the staff that the temperature at the corresponding numbered cable detection position is abnormal; P3: After receiving the circulation warning signal 1, the warning light corresponding to the circulation on the controller (7) lights up, the number of the corresponding circulation measurement point is displayed on the display screen, the buzzer module inside the controller (7) emits a buzzer warning, and the first color number light of the three-color indicator light set on the controller (7) lights up, informing the staff that the cable detection position with the corresponding number may be corroded or damaged; P4: After receiving the second circulation warning signal, the warning light corresponding to the circulation on the controller (7) lights up, the number of the corresponding circulation measurement point is displayed on the display screen, the buzzer module inside the controller (7) emits a buzzer warning, and the second color number light of the three-color indicator light set on the controller (7) lights up, informing the staff that there may be a grounding fault at the corresponding numbered cable detection position; P5: After the early warning signal is transmitted, the response time is counted. If there is no response within the set time period, an early warning text message is sent to the pre-set mobile phone numbers of relevant maintenance personnel and management personnel through the SMS platform. The text message content includes the abnormal cable location and specific abnormal parameter values, so that relevant personnel can know the situation at the first time and take countermeasures.

7. The intelligent cable monitoring system according to claim 6, characterized in that: The controller is mounted on an aluminum-magnesium alloy cable connection frame, which comprises a mounting plate (1), a U-shaped frame (2) is mounted on the mounting plate (1), a plurality of brackets (4) are mounted on the U-shaped frame (2) along the length direction, and the lower end of each bracket (4) is supported by a support member; a controller (7) is mounted on the bracket (4); The support member comprises an articulated seat 1 (9) fixedly connected to the U-shaped frame (2) and an articulated seat 2 (12) fixedly connected to the bottom surface of the bracket (4); an articulated head 1 (10) is rotatably provided on the articulated seat 1 (9); a screw rod 1 (11) is fixed to the other end of the articulated head 1 (10); an articulated head 2 is rotatably provided on the articulated seat 2 (12); a screw rod 2 (5) is fixed to the other end of the articulated head 2; the screw rod 1 (11) and the screw rod 2 (5) are threadedly connected to the connecting member (6).

8. The intelligent cable monitoring system according to claim 7, characterized in that: The connecting piece (6) is a threaded sleeve and the threads of the left and right sections inside the sleeve are in opposite directions.

9. The intelligent cable monitoring system according to claim 8, characterized in that: The bracket (4) is connected to the U-shaped frame (2) via fixing bolts (3) and nuts (8).

10. The intelligent cable monitoring system according to claim 9, characterized in that: The mounting plate (1) is fixed in the cable well by means of locking bolts.

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