GIS expansion joint deformation measuring scale for on-line monitoring

Abstract

The invention discloses a GIS expansion joint deformation measuring scale for online monitoring, which relates to the technical field of expansion joint monitoring, and comprises a scale, a processor and a wireless transmission module, a digital display module is arranged at the side part of the scale, the digital display module of the scale is connected with the processor through the wireless transmission module, the processor comprises a module box, the module box is provided with a display module, and the display module is connected with the processor through the wireless transmission module. And an edge calculation module, a temperature measurement module, a time synchronization module and a data storage module are arranged in the module box. According to the device, the scale is used for uninterruptedly monitoring, meanwhile, the time synchronization module is arranged in the process that the scale sends data to the processor, the time synchronization module provides time synchronization service to optimize the data transmission and processing process, the processor uninterruptedly calculates and judges, and the influence of temperature on the deformation quantity of the GIS expansion joint is considered in the judgment process of the processor; and the judgment result is displayed on the module box, so that workers can check at any time during inspection, and the workers can find problems at the first time and take correct treatment measures.

Description

Technical Field

[0001] The present invention belongs to the technical field of expansion joint monitoring, and particularly relates to a deformation measurement scale for on-line monitoring of GIS expansion joints. Background Technique

[0002] Gas-insulated switchgear seals all high-voltage electrical components in a grounded metal cylinder metal-enclosed switchgear, using SF6 gas as the insulating medium, abbreviated as GIS. It mainly consists of circuit breakers, current transformers, disconnectors, busbars, outgoing bushings, expansion joints and other equipment. The busbars are connected to each device in the form of pipes in GIS, and their lengths are different. As an auxiliary device of the busbar pipes, the expansion joints are basically used as compensation devices for length compensation during the installation of GIS equipment and for the expansion and contraction amount changes of the busbar pipes with climate and seasonal temperature changes after operation.

[0003] In high-altitude or extremely low-temperature regions in winter, the temperature difference between day and night is large, and the GIS pipes change with the temperature. If the process of the GIS expansion joint is poor during installation or manufacturing, the GIS expansion joint cannot play a role in adjusting the expansion and contraction amount during the temperature change process. In extreme environments, it may even cause air leakage at the connection part of the busbar pipes due to the expansion and contraction stress of the GIS equipment, and in severe cases, it may even damage the insulation performance of the equipment.

[0004] Chinese Patent No. 201821351637.5 discloses a deformation recording scale for GIS expansion joints. For this kind of deformation recording scale for GIS expansion joints, both sides of the expansion joint are installed on the flanges, including a scale, a cursor connecting rod, a main cursor and a passive cursor. One end of the scale with graduations is fixed on the flange on one side of the expansion joint, and the main cursor sleeved on the scale is connected to the flange on the other side of the expansion joint through the cursor connecting rod. There is a passive cursor on each side of the main cursor.

[0005] The existing GIS deformation measurement scale has the following deficiencies:

[0006] 1) Poor real-time monitoring ability, data cannot be transmitted to the background data processing center in real time, the timeliness of fault judgment and processing is poor. Once an abnormality occurs in the GIS expansion joint, remote duty personnel cannot immediately know that there is an abnormality in the equipment.

[0007] 2) There are many installation positions and a large number of GIS expansion joints, and data needs to be manually transcribed, with low intelligent application, time-consuming and laborious, and low accuracy.

[0008] 3) There is a possibility of data interruption in the manually recorded data, and the continuity of the data cannot be achieved, which is not conducive to data comparison and analysis.

[0009] 4) Using traditional scale measurement, the data source is relatively single, and data analysis does not refer to quantities such as temperature and time.

[0010] 5) The data error judgment and comparative analysis have a long cycle, and it is impossible to monitor the deformation data in real time and conduct comprehensive comparative analysis well.

[0011] In actual use, it is very unfriendly to the on-site work recorders. It requires on-site staff to read and record all the measurement data of the sleeve expansion joint scale, and then calculate the deformation amount. The workload is large, and the accuracy of manual recording is low.

[0012] Therefore, to solve the above problems, it is necessary to design an online monitoring GIS expansion joint deformation measurement scale to measure and judge the deformation amount of the expansion joint. Summary of the Invention

[0013] The technical problem to be solved by the present invention is to solve the deficiencies existing in the prior art, and design an online monitoring GIS expansion joint deformation measurement scale. This online monitoring GIS expansion joint deformation measurement scale has a simple structure, including a scale, a processor and a wireless transmission module. The scale measures the expansion joint in real time, and the scale transmits the measurement results to the processor through the wireless transmission module. The processor records the data measured by the scale and calculates according to the calculation steps set in the processor. According to the calculation results, it judges whether the deformation amount of the expansion joint is within the preset normal range, and displays it through the display module, so that the staff can immediately find it when checking on-site.

[0014] In addition, a time synchronization module is set during the process of the scale sending data to the processor. The time synchronization module provides time synchronization services to optimize the data transmission and processing process. The processor continuously calculates and judges. During the judgment process of the processor, the influence of temperature on the deformation amount of the GIS expansion joint is considered, and the judgment results are displayed on the module box for the staff to check at any time during the patrol, which is convenient for the staff to discover problems in the first time and take correct treatment measures, solving the problem that the current GIS expansion joint deformation measurement scale is very unfriendly to on-site recorders, and it requires on-site staff to read and record all the measurement data of the sleeve expansion joint scale, and then calculate the deformation amount, resulting in a large workload.

[0015] The solution adopted by the present invention to solve its technical problems is as follows:

[0016] An online monitoring GIS expansion joint deformation measurement scale,

[0017] Characterized in that,

[0018] It includes a scale, a processor and a wireless transmission module,

[0019] A digital display module is arranged on the side of the scale,

[0020] The digital display module of the scale is connected to the processor through the wireless transmission module,

[0021] The processor includes a module box,

[0022] The module box is provided with a display screen,

[0023] An edge computing module, a temperature measurement module, a time synchronization module, and a data storage module are arranged in the module box,

[0024] The digital display module is used to collect the measurement data of the scale and send the collected data to the edge computing module,

[0025] The edge computing module is used to continuously record the data collected by the digital display module, send the recorded data to the data storage module, and perform calculations and judgments synchronously,

[0026] The display screen is used to display the calculation and judgment results of the edge computing module,

[0027] The temperature measurement module is used to monitor the ambient temperature around the module box in real time,

[0028] The time synchronization module is used to provide time synchronization services,

[0029] The data storage module is used to store the data collected by the digital display module.

[0030] As a preferred embodiment of the present invention,

[0031] The edge computing module includes the following calculation steps:

[0032] Set the initial monitoring time point as t, the monitoring time interval as Δt, and the monitoring time point after n time intervals as t + nΔt, where n is a positive integer,

[0033] At the same time, set the initial value of the expansion joint as L, then the monitored value after n time intervals is , where the unit of the value of the expansion joint is mm,

[0034] Then the measured difference is ΔLr, where r is a positive integer,

[0035] The calculation method of the measured difference ΔLr is:

[0036] , where r = n.

[0037] As a preferred embodiment of the present invention,

[0038] The edge computing module includes the following judgment principles:

[0039] Set the allowable deformation error range of the expansion joint as ±X, and the unit is mm,

[0040] When: , it is determined that the monitoring result is normal;

[0041] However: , it is determined that the monitoring result is abnormal,

[0042] where Δm is the change amount of the expansion joint,

[0043] α is the coefficient of thermal expansion of the material,

[0044] ΔT is the temperature change amount, and the temperature change amount is the temperature difference between the temperature at the time of installation of the expansion joint and the environment during operation.

[0045] As a preferred embodiment of the present invention,

[0046] The time synchronization module uses both the GPS positioning system and the Beidou satellite navigation system as the time reference source to provide time synchronization services for the processor.

[0047] As a preferred embodiment of the present invention,

[0048] The processor is connected to a monitoring platform,

[0049] The edge computing module records data and sends the data to the monitoring platform at the same time.

[0050] As a preferred embodiment of the present invention,

[0051] Both the monitoring platform and the processor are provided with alarm modules.

[0052] As a preferred embodiment of the present invention,

[0053] The alarm module adopts an audible and visual alarm mode.

[0054] As a preferred embodiment of the present invention,

[0055] The processor is connected to a wire tracer through a wireless transmission module.

[0056] As a preferred embodiment of the present invention,

[0057] The processor and the monitoring platform are connected through an information communication module,

[0058] The information communication module includes a housing,

[0059] A wireless communication module is arranged inside the housing,

[0060] A connection interface is arranged on the side.

[0061] As a preferred embodiment of the present invention,

[0062] The scale includes a scale body and a cursor.

[0063] The scale body is provided with a cursor connecting rod for connecting the cursor, and the cursor is fixed on the side of the scale body with scales through the cursor connecting rod.

[0064] The digital display unit is arranged on the side of the scale body with scales.

[0065] Compared with the prior art, the present invention has the following beneficial effects:

[0066] 1. The device of the present invention provides an on-line monitoring GIS expansion joint deformation measurement scale, which has a simple structure and includes a scale, a processor and a wireless transmission module. The scale measures the expansion joint in real time, and the scale transmits the measurement results to the processor through the wireless transmission module. The processor records the data measured by the scale and calculates according to the calculation steps set in the processor, judges whether the deformation amount of the expansion joint is within the preset normal range according to the calculation results, and displays it through the display screen, so that the staff can immediately find it when checking on site.

[0067] The device of the present invention sets the scale and the processor to measure the deformation amount of the GIS expansion joint in real time. The scale monitors continuously. A time synchronization module is set during the process of the scale sending data to the processor, and the time synchronization module provides time synchronization services to optimize the data transmission and processing process. The processor calculates and judges continuously. During the judgment process of the processor, the influence on the deformation amount of the GIS expansion joint is considered, and the judgment results are displayed on the module box for the staff to check at any time during the patrol, which is convenient for the staff to find problems in the first time and make correct treatment measures.

[0068] 2. The processor is connected to the monitoring platform through the information communication module. While recording, calculating and judging the data, the edge computing module sends the data to the monitoring platform, and the monitoring platform performs secondary storage of the data, which is convenient for the staff to remotely view the relevant data of the deformation amount of the GIS expansion joint and realize the on-line monitoring of the deformation amount of the GIS expansion joint.

[0069] 3. The scale is provided with a digital display module, and the measurement results of the scale are displayed through the digital display screen. There is no need to manually align the scales for reading, which avoids the inconvenience of manually aligning the scales for reading of the traditional scale and the errors caused by manual reading. Only by viewing the numbers can the measurement results be obtained, which greatly simplifies the operation process and improves the accuracy and reliability of the measurement.

[0070] 6. The processor is connected to the wire finder through the wireless transmission module. When the staff conducts a manual inspection, the device monitoring data, temperature, deformation amount and other information can be sent to the inspection instrument, which is convenient for the on-site inspection personnel to view the deformation amount of the GIS expansion joint, the judgment results of the processor and other remaining data at any time. Description of the Drawings

[0071] Figure 1 Schematic diagram of the structure of a deformation measurement scale for an on-line monitored GIS expansion joint proposed by the present invention;

[0072] Figure 2 Side view of a deformation measurement scale for an on-line monitored GIS expansion joint proposed by the present invention from a certain perspective;

[0073] Figure 3 Side view of a deformation measurement scale for an on-line monitored GIS expansion joint proposed by the present invention from a certain perspective;

[0074] Figure 4 Schematic diagram of the monitoring platform of a deformation measurement scale for an on-line monitored GIS expansion joint proposed by the present invention;

[0075] Figure 5 Schematic diagram of the structure of a processor of a deformation measurement scale for an on-line monitored GIS expansion joint proposed by the present invention;

[0076] Figure 6 Schematic diagram of the principle of a certain embodiment of a deformation measurement scale for an on-line monitored GIS expansion joint proposed by the present invention;

[0077] Figure 7 Schematic diagram of the principle of a certain embodiment of a deformation measurement scale for an on-line monitored GIS expansion joint proposed by the present invention.

[0078] Description of reference numerals:

[0079] 1. Scale,

[0080] 1-1. Scale main body,

[0081] 1-2. Vernier,

[0082] 1-3. Digital display module,

[0083] 2. Processor,

[0084] 2-1. Module box,

[0085] 2-2. Display screen,

[0086] 2-3. Edge computing module,

[0087] 2-4. Temperature measurement module,

[0088] 2-5. Time synchronization module,

[0089] 2-6. Data storage module,

[0090] 2-7. Alarm module,

[0091] 3. Wireless transmission module,

[0092] 4. Monitoring platform. Specific implementation manners

[0093] The specific implementation manners of the present invention will be described below in conjunction with the accompanying drawings and embodiments:

[0094] It should be noted that the structures, colors, proportions, sizes, etc. illustrated in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed by the present invention.

[0095] At the same time, in the description of the present invention, it should be understood that the orientation or positional relationships indicated by terms such as "one end", "the other end", "the middle part", "above", "one side", "the top", "inside", "the front part", "the center", "both ends", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0096] In addition, the terms "first", "second", "third", "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third", "fourth" may explicitly or implicitly include at least one of such features.

[0097] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", "fixation", "swivel connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0098] As Figures 1-7 shown, the present invention proposes an online monitoring GIS expansion joint deformation measurement scale, which includes a scale 1, a processor 2, and a wireless transmission module 3. The scale 1 is fixed on the side of the expansion joint through the flange of the expansion joint. Both the scale 1 and the processor 2 are provided with corresponding wireless transmission modules 3. The processor 2 is fixed on the side of the busbar connected to the expansion joint that fixes the scale 1. The scale 1 and the processor 2 are relatively close to ensure the accuracy of data transmission.

[0099] The expansion joint is measured in real time by the scale 1. The scale 1 is connected to the processor 2 through the wireless transmission module 3, so that the scale 1 transmits the measurement result to the processor 2 through the wireless transmission module 3. The processor 2 records the data measured by the scale 1 and calculates according to the calculation steps set in the processor 2, then judges whether the deformation amount of the expansion joint is within the preset normal range, and displays it through the display module 2-2. When the on-site staff conducts an inspection, they can view it in real time, and when the deformation amount of the GIS expansion joint exceeds the preset value, it can be immediately discovered.

[0100] The device of the present invention sets the scale 1 to measure the deformation amount of the GIS expansion joint in real time, and transmits the transmission result to the processor 2 in real time through the wireless transmission module 3. The processor 2 continuously calculates the received data in real time, judges whether the deformation amount is normal, and displays the judgment result for the on-site staff to view during the patrol inspection, ensuring the online monitoring of the deformation amount of the GIS expansion joint.

[0101] Preferably, an alarm device can also be set on the processor 2 to remind the on-site staff that the deformation amount of the GIS expansion joint exceeds the preset range and needs to be repaired in time.

[0102] Among them, the fixed position of the processor 2 is not fixed, and it can be fixed in various positions such as up, down, left, and right, and is specifically adjusted according to the actual situation on site. The position where most on-site staff can easily see the result displayed by the display module 2-2 is the fixed position of the processor 2, ensuring the convenience of on-site staff viewing while ensuring stable installation.

[0103] A digital display module 1-3 is arranged on the side of the scale 1. The digital display module 1-3 can display the measurement result of the scale 1 through a digital display screen. The on-site staff does not need to manually align the scale for reading, avoiding the inconvenience of the traditional scale 1 that requires manual alignment of the scale for reading. They only need to view the numbers on the digital display screen to obtain the measurement result, greatly simplifying the operation process. In addition, the digital display module 1-3 can reduce the error caused by manual reading and improve the accuracy and reliability of the measurement.

[0104] The digital display module 1-3 of the scale 1 is connected to the processor 2 through the wireless transmission module 3. The digital display module 1-3 transmits the measurement result to the processor 2 through the wireless transmission module 3, and then the processor 2 records, calculates and judges the data monitored by the digital display module 1-3 to ensure the timeliness and stability of data transmission, thereby ensuring the online monitoring of the deformation amount of the GIS expansion joint.

[0105] The processor 2 includes a module box 2-1, which uniformly houses the various modules of the processor 2. It is convenient for installation and transportation and protects the various modules at the same time, avoiding the problem that the service life of the various modules is relatively short due to long-term exposure to wind, water, sun and rain.

[0106] As shown Figure 5 in FIG., the module box 2-1 is provided with a display module 2-2, and the display module 2-2 is used to display the calculation and judgment results of the edge computing module 2-3 for the staff to view in real time.

[0107] The display module 2-2 is at least provided with a display screen for displaying the calculation results, such as an LED screen

[0108] An edge computing module 2-3, a temperature measurement module 2-4, a time synchronization module, and a data storage module 2-6 are arranged in the module box 2-1.

[0109] The digital display module 1-3 is used to collect the measurement data of the scale 1 and send the collected data to the edge computing module 2-3, providing data support for online monitoring of the deformation of the GIS expansion joint.

[0110] The edge computing module 2-3 is used to continuously record the data collected by the digital display module 1-3, send the recorded data to the data storage module 2-6, perform calculations and judgments synchronously, and complete the specific data processing and judgment process for online monitoring of the deformation of the GIS expansion joint.

[0111] The temperature measurement module 2-4 is used to monitor the ambient temperature around the module box 2-1 in real time. In high-altitude or extremely cold winter areas, the temperature difference between day and night is large, and the GIS pipeline changes with the change of temperature. If the process of installing or manufacturing the GIS expansion joint is poor, the GIS expansion joint cannot play a role in adjusting the expansion amount during the temperature change process. In extreme environments, it may even cause air leakage at the connection part of the busbar pipeline due to the action of the expansion stress of the GIS equipment, and in severe cases, it may even damage the insulation performance of the equipment. Therefore, the influence of the ambient temperature needs to be considered when judging whether the deformation amount of the expansion joint meets the preset value.

[0112] The time synchronization module is used to provide time synchronization services. During the process of the digital display module 1-3 measuring and sending data to the processor 2, multiple measurement nodes may collect data simultaneously or at different time points. If the time of these nodes is not synchronized, there will be a deviation in the collected data in the time dimension. Even if the measured values are accurate, the measurement results will be incorrect. Precise time synchronization helps to optimize the data transmission and processing process.

[0113] The data storage module 2-6 is used to store the data collected by the digital display module 1-3. By storing the data measured by the scale 1 through the storage module, it is convenient for long-term data comparison.

[0114] As Figure 6 shown, the working principle of the device of the present invention is:

[0115] 1. The digital display modules 1-3 collect the measurement data of the scale 1, and the time synchronization module provides time synchronization services for the data collected by the digital display modules 1-3;

[0116] 2. The temperature measurement module 2-4 synchronously measures the ambient temperature around the device;

[0117] 3. The wireless transmission module 3 sends the data collected by the digital display modules 1-3 and the temperature measurement module 2-4 to the edge computing module 2-3;

[0118] 4. The edge computing module 2-3 records and calculates the received data, and determines whether the deformation of the GIS expansion joint is within the preset range according to the calculation results;

[0119] 5. The display module 2-2 displays the judgment results of the edge computing module 2-3.

[0120] The edge computing module 2-3 includes the following calculation steps:

[0121] Set the initial monitoring time point as t, and the monitoring time interval as Δt. Then the subsequent monitoring times are t + 1Δt, t + 2Δt, t + 3Δt......t + nΔt (n = 1, 2, 3...).

[0122] At the same time, set the initial value of the expansion joint as L (unit: mm). Then the monitored value after n time intervals is ,

[0123] Then the measured difference is ΔLr (r = 1, 2, 3...),

[0124] The calculation method of the measured difference ΔLr is:

[0125] .

[0126] The edge computing module 2-3 includes the following judgment principles:

[0127] Set the allowable deformation error range of the expansion joint as ±X, unit: mm,

[0128] When: , it is determined that the monitoring result is normal;

[0129] While: , it is determined that the monitoring result is abnormal,

[0130] Where, Δm is the change amount of the expansion joint, α is the coefficient of thermal expansion of the material, ΔT is the temperature change amount, and the temperature change amount is the temperature difference between the temperature at the time of installation of the expansion joint and the ambient temperature during operation.

[0131] Set the error range of the allowable deformation of the expansion joint, and the limit value of the deformation under the test pressure is 15%. During actual operation, monitoring means need to be combined to ensure that the expansion joint is within a reasonable compensation range, and the set value needs to be set manually according to the actual situation.

[0132] The time synchronization module uses both the GPS positioning system and the Beidou satellite navigation system as the time reference source to provide time synchronization services for the processor 2. By combining the respective advantages of GPS and Beidou, the accuracy and reliability of time synchronization are improved.

[0133] As Figure 7 shown, the processor 2 is connected to the monitoring platform 4. While the edge computing module 2-3 records data, it sends the data to the monitoring platform 4. The monitoring platform 4 performs secondary storage of the data, facilitating the staff to remotely view the relevant data of the deformation amount of the GIS expansion joint in the background.

[0134] The monitoring platform 4 is provided with an alarm module 2-7. It reminds the staff that the deformation of the GIS expansion joint exceeds the preset range, and corresponding maintenance, replacement and other remedial measures need to be taken.

[0135] The alarm module 2-7 adopts an audible and visual alarm mode. The dual alarm mode of sound reminder and light reminder can ensure that the staff can receive the early warning signal sent by the monitoring platform 4 in time and take corresponding subsequent remedial measures in time.

[0136] The processor 2 is connected to a wire tracer through a wireless transmission module 3. During manual inspection, information such as equipment monitoring data, temperature, and deformation amount can be sent to the inspection instrument. The staff can view the deformation amount of the GIS expansion joint and the judgment result of the processor 2 at any time. The staff does not need to move near the processor 2 to view the data, which is convenient for on-site inspection personnel to view the data.

[0137] The processor 2 and the monitoring platform 4 are connected through an information communication module 2-8. The information communication module 2-8 includes a housing. A wireless communication module is set inside the housing, such as Wi-Fi, Bluetooth, 4G / 5G, etc., so that the processor 2 and the monitoring platform 4 can transmit data through a wireless transmission mode; connection interfaces are set on the side, such as Ethernet ports, USB ports, etc., so that the processor 2 and the monitoring platform 4 can transmit data through a physical link.

[0138] The scale 1 includes a scale main body 1-1 and a cursor 2. The scale main body 1-1 is provided with a cursor 2 connecting rod for connecting the cursor 2. The cursor 2 is fixed on the side of the scale main body 1-1 with scales through the cursor 2 connecting rod. The digital display unit is set on the side of the scale main body 1-1 with scales, which is convenient for the digital display module 1-3 to capture the relative moving distance of the cursor 2 in real time.

[0139] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those of ordinary skill in the art.

[0140] Many other changes and modifications can be made without departing from the concept and scope of the present invention. It should be understood that the present invention is not limited to the specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. A GIS expansion joint deformation measuring scale for online monitoring, It is characterized in that It comprises a ruler (1), a processor (2) and a wireless transmission module (3). A digital display module (1-3) is provided on the side of the ruler (1). The digital display module (1-3) of the ruler (1) and the processor (2) are connected via a wireless transmission module (3). The processor (2) comprises a module box (2-1), The module box (2-1) is provided with a display module (2-2). The module box (2-1) is provided with an edge computing module, a temperature measurement module, a time synchronization module and a data storage module. The digital display module (1-3) is used to collect measurement data of the ruler (1) and send the collected data to the edge computing module. The edge computing module is used to continuously record the data collected by the digital display module (1-3), and send the recorded data to the data storage module to perform calculations and judgments synchronously. The display module (2-2) is used to display the calculation and judgment results of the edge computing module. The temperature measurement module is used to monitor the ambient temperature of the module box (2-1) in real time. The timing module is used to provide time synchronization services. The data storage module is used to store data collected by the digital display modules (1-3).

2. A GIS expansion joint deformation measuring scale for online monitoring as claimed in claim 1, It is characterized in that The edge computing module includes the following computing steps: The initial monitoring time point is set to t, the monitoring time interval is Δt, and the monitoring time point after n time intervals is t+nΔt, where n is a positive integer. At the same time, the initial value of the expansion joint is set to L, and the value monitored after n time intervals is , where the unit of the expansion joint value is mm, The measured difference is ΔLr, where r is a positive integer. The measured difference ΔLr is calculated as: , where r=n.

3. A GIS expansion joint deformation measuring scale for online monitoring as claimed in claim 2, It is characterized in that The edge computing module includes the following judgment principles: Set the allowable deformation error range of the expansion joint to ±X, in mm. when: , the monitoring result is judged to be normal; and: , the monitoring result is judged to be abnormal. Where Δm is the change in the expansion joint, α is the thermal expansion coefficient of the material, and ΔT is the temperature change, which is the temperature difference between the temperature when the expansion joint is installed and the environment during operation.

4. The GIS expansion joint deformation measuring scale for online monitoring according to claim 1, It is characterized in that The time synchronization module uses the GPS positioning system and the Beidou satellite navigation system as time reference sources to provide time synchronization services for the processor (2).

5. A GIS expansion joint deformation measuring scale for online monitoring as claimed in claim 4, It is characterized in that The processor (2) is connected to a monitoring platform (4). The edge computing module records the data and sends the data to the monitoring platform (4).

6. The GIS expansion joint deformation measuring scale for online monitoring according to claim 1, It is characterized in that The monitoring platform (4) and the processor (2) are both provided with an alarm module.

7. A GIS expansion joint deformation measuring scale for online monitoring as claimed in claim 6, It is characterized in that The alarm module adopts an audible and visual alarm mode.

8. A GIS expansion joint deformation measuring scale for online monitoring as claimed in claim 7, It is characterized in that The processor (2) is connected to a line finder via a wireless transmission module (3).

9. The GIS expansion joint deformation measuring scale for online monitoring according to claim 1, It is characterized in that The processor (2) and the monitoring platform (4) are connected via an information communication module. The information communication module comprises a housing, A wireless communication module is arranged in the housing. The side portion is provided with a connection interface.

10. The GIS expansion joint deformation measuring scale for online monitoring according to claim 1, It is characterized in that The ruler (1) comprises a ruler body (1-1) and a cursor (2). The scale body (1-1) is provided with a cursor (2) connecting rod connected to the cursor (2), and the cursor (2) is fixed to a side of the scale body (1-1) provided with a scale through the cursor (2) connecting rod. The digital display unit is arranged on a side of the ruler body (1-1) on which scales are arranged.

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