GIL deformation monitoring system and method based on capacitive RFID tag, and storage medium

Abstract

The invention provides a GIL deformation monitoring system and method based on a capacitive RFID tag, and a storage medium, and belongs to the technical field of power transmission line monitoring. The GIL deformation monitoring system based on the capacitive RFID tag comprises a passive capacitive RFID tag and a terminal module, the passive capacitive RFID tag comprises a pole plate type capacitive sensor, the pole plate type capacitive sensor is used for being attached to the outer wall of a barrel of the GIL, and the terminal module is in wireless communication connection with the passive capacitive RFID tag and is used for receiving capacitance change information transmitted by the pole plate type capacitive sensor when the barrel deforms; generating deformation data of the electrode plate type capacitance sensor according to the capacitance change information; generating deformation data of the cylinder according to the deformation data of the pole plate type capacitive sensor; and generating and storing deformation monitoring information of the GIL according to the deformation data of the cylinder. The GIL deformation monitoring device is simple in structure and convenient to install, transmission stability and accuracy of generated data can be guaranteed, and then precise monitoring of GIL deformation is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of power transmission line monitoring, and in particular relates to a GIL deformation monitoring system, method and storage medium based on a capacitive RFID tag. Background Art

[0002] Gas Insulated Transmission Lines (GIL) are power transmission equipment that consists of a grounded alloy aluminum shell and an internal tubular alloy aluminum conductor and uses insulating gases such as sulfur hexafluoride as the insulating medium. GIL has the characteristics of large transmission capacity, low unit loss and flexible layout, and has obvious performance advantages over traditional power transmission.

[0003] At present, as a pressure vessel, the grounded alloy aluminum shell of GIL, i.e., the cylinder, is injected with high-voltage insulating gas. During the production, manufacturing, operation and maintenance of GIL, if external conditions such as ambient temperature or air pressure change, it is very easy to cause deformation of the cylinder. Once the deformation reaches a certain extent, it will have an adverse effect on the overall operation safety and reliability of GIL. Therefore, it is necessary to monitor the deformation of the cylinder of GIL during service, and promptly identify and deal with the location of excessive deformation.

[0004] However, as can be seen from the Chinese invention patent with application number "201910434862.8" and the Chinese utility model patent with application number "201920754276.7", the existing deformation monitoring device has a relatively complex structure and a large monitoring error, and is not suitable for accurate monitoring of the deformation of the outer shell of a pressure vessel such as a cylinder. Summary of the invention

[0005] The technical problem to be solved by the present invention is how to achieve accurate monitoring of GIL deformation. In view of the shortcomings of the prior art, a GIL deformation monitoring system, method and storage medium based on a capacitive RFID tag are provided.

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

[0007] First, as Figure 1 As shown, the present invention provides a GIL deformation monitoring system based on a capacitive RFID tag, comprising a passive capacitive RFID tag and a terminal module; the passive capacitive RFID tag comprises a plate-type capacitive sensor, the plate-type capacitive sensor is used to be attached to the outer wall of the cylinder of the GIL, the terminal module is wirelessly connected to the passive capacitive RFID tag, and is used to:

[0008] When the cylinder is deformed, receiving capacitance change information transmitted by the plate-type capacitance sensor;

[0009] generating deformation data of the plate-type capacitance sensor according to the capacitance change information;

[0010] generating deformation data of the cylinder according to the deformation data of the plate-type capacitance sensor;

[0011] Deformation monitoring information of the GIL is generated and stored according to the deformation data of the cylinder.

[0012] Compared with the prior art, the beneficial effects of the GIL deformation monitoring system based on the capacitive RFID tag of the present invention include: the passive capacitive RFID tag and the terminal module constitute the GIL deformation monitoring system based on the capacitive RFID tag, and the structure is relatively simple, wherein the passive capacitive RFID tag is provided with a plate-type capacitive sensor, and the plate-type capacitive sensor can be attached to the outer wall of the cylinder of the GIL, so that when the GIL is deformed, the deformation of the cylinder can cause the deformation of the plate-type capacitive sensor, thereby causing the capacitance change information output by the plate-type capacitive sensor to change, and the terminal module is wirelessly connected to the passive capacitive RFID tag, and the terminal module can be located in an area far away from the GIL, and can accurately receive the output of the plate-type capacitive sensor. Capacitance change information can ensure the stable transmission of the original data information of GIL monitoring; on this basis, the terminal module can first generate the deformation data of the plate type capacitance sensor according to the capacitance change information, and then generate the deformation data of the cylinder according to the deformation data of the plate type capacitance sensor. On the basis of accurately receiving the capacitance change information, the accuracy of the generated cylinder deformation data can be effectively guaranteed, and the terminal module can generate and store the GIL deformation monitoring information according to the cylinder deformation data, which can not only provide accurate GIL deformation monitoring information and ensure accurate monitoring of GIL deformation, but also allow operators to retrieve the stored GIL deformation monitoring information at any time, and operators can trace the deformation of the GIL, which is convenient for health assessment and maintenance of the GIL.

[0013] Optionally, the passive capacitive RFID tag also includes a transmission unit, the plate-type capacitive sensor includes an anti-metal substrate, a proximal capacitor plate and a distal capacitor plate, the anti-metal substrate is used to adhere to the outer wall of the cylinder, the transmission unit, the proximal capacitor plate and the distal capacitor plate are arranged in sequence on the anti-metal substrate, the proximal capacitor plate and the distal capacitor plate are parallel to each other, the transmission unit is wirelessly connected to the terminal module, and is used to obtain the capacitance change information and transmit it to the terminal module.

[0014] Optionally, there are multiple passive capacitive RFID tags, and the multiple passive capacitive RFID tags are used to be evenly distributed along the axial direction of the cylinder, and / or the multiple passive capacitive RFID tags are used to be evenly distributed along the circumferential direction of the cylinder.

[0015] Optionally, the transmission unit includes a passive radio frequency tag antenna and a radio frequency tag chip, the radio frequency tag chip is wirelessly connected to the terminal module through the passive radio frequency tag antenna, and the radio frequency tag chip is used to transmit the identity information, spatial position information and capacitance change information of the passive capacitive RFID tag to the terminal module.

[0016] Optionally, the terminal module includes an analysis and processing unit, which is wirelessly connected to the transmission unit and is used to generate deformation data of the plate-type capacitance sensor according to the capacitance change information and the following formula:

[0017]

[0018] Among them, ΔC is the capacitance change, ε is the dielectric constant of the medium between the proximal capacitor plate and the distal capacitor plate, H is the height of the proximal capacitor plate and the distal capacitor plate, T is the ambient temperature between the proximal capacitor plate and the distal capacitor plate, S is the facing area of ​​the proximal capacitor plate and the distal capacitor plate, Δd is the distance between the proximal capacitor plate and the distal capacitor plate, k is the electrostatic force constant, and π is the pi.

[0019] Optionally, the analysis and processing unit is used to obtain the S and the Δd according to the following formula:

[0020] S=(D0-L0*sin(θ))*H

[0021] Δd=D0*sin(θ)

[0022] Among them, D0 is the length of the proximal capacitor plate, L0 is the length of the distal capacitor plate, θ is the deflection angle of the proximal capacitor plate and the distal capacitor plate or the deflection angle of the pole arms of the two, the pole arm of the proximal capacitor plate is the perpendicular line from the transmission unit to the proximal capacitor plate, and the pole arm of the distal capacitor plate is the perpendicular line from the transmission unit to the distal capacitor plate.

[0023] Optionally, the passive capacitive RFID tag also includes an environment sensing unit, which includes at least one of a thermal sensitive element, a pressure sensitive element, an electrical sensitive element or a light sensitive element. The environment sensing unit is wirelessly connected to the analysis and processing unit, and is used to obtain environmental sensing data around the plate-type capacitive sensor and transmit it to the analysis and processing unit, so that the analysis and processing unit can correct the ε according to the environmental sensing data.

[0024] Optionally, the terminal module also includes a radio frequency reader / writer, which is wirelessly connected to the analysis and processing unit and the transmission unit respectively, and the radio frequency reader / writer is used to transmit an excitation signal to the plate-type capacitive sensor through the transmission unit, and is used to transmit the capacitance change information to the analysis and processing unit.

[0025] In a second aspect, the present invention further provides a GIL deformation monitoring method based on a passive capacitive RFID tag, which is applied to the GIL deformation monitoring system based on a capacitive RFID tag as described above, and the GIL deformation monitoring method based on a passive capacitive RFID tag comprises the following steps:

[0026] When the cylinder of the GIL is deformed, the plate-type capacitance sensor of the passive capacitive RFID tag of the GIL deformation monitoring system based on the capacitive RFID tag generates capacitance change information;

[0027] Transmitting the capacitance change information to a terminal module of the GIL deformation monitoring system based on a capacitive RFID tag through the plate-type capacitance sensor, and generating deformation data of the plate-type capacitance sensor through the terminal module and the capacitance change information;

[0028] Generate deformation data of the cylinder through deformation data of the terminal module and the plate-type capacitive sensor;

[0029] The deformation monitoring information of the GIL is generated by the deformation data of the terminal module and the cylinder, and stored in the terminal module.

[0030] Compared with the prior art, the beneficial effects of the GIL deformation monitoring method based on the passive capacitive RFID tag of the present invention are the same as the beneficial effects of the GIL deformation monitoring system based on the capacitive RFID tag as described above, which will not be repeated here.

[0031] In a third aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the GIL deformation monitoring method based on the passive capacitive RFID tag as described above is implemented.

[0032] Compared with the prior art, the beneficial effects of the computer-readable storage medium of the present invention are the same as the beneficial effects of the GIL deformation monitoring method based on the passive capacitive RFID tag as described above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0034] Figure 1 : A connection diagram of a GIL deformation monitoring system based on a capacitive RFID tag in an embodiment of the present invention;

[0035] Figure 2 : A schematic diagram of the distribution of the plate-type capacitive sensor on the cylinder at a viewing angle in an embodiment of the present invention;

[0036] Figure 3 : A schematic diagram of the distribution of the plate-type capacitive sensor on the cylinder from another perspective in the embodiment of the present invention;

[0037] Figure 4 : Schematic diagram of deformation of the plate-type capacitive sensor in an embodiment of the present invention;

[0038] Figure 5 : Flow chart of a GIL deformation monitoring method based on a passive capacitive RFID tag in an embodiment of the present invention;

[0039] Figure 6 : Monitoring data diagram of the axial deformation of the GIL in the embodiment of the present invention;

[0040] Figure 7 : Monitoring data diagram of radial deformation of GIL in an embodiment of the present invention.

[0041] Among them, 1-passive capacitive RFID tag, 11-plate capacitive sensor, 111-anti-metal substrate, 112-proximal capacitive plate, 113-remote capacitive plate, 12-transmission unit, 2-terminal module, 21-analysis and processing unit, 22-radio frequency reader, 3-cylinder. DETAILED DESCRIPTION

[0042] In order to better understand the present invention, the content of the present invention is further clearly described below in conjunction with the embodiments and drawings. Although certain embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. Instead, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only used for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0043] It should be noted that the Z axis in the drawings represents the vertical direction, that is, the up and down position, and the positive direction of the Z axis represents the top, and the reverse direction of the Z axis represents the bottom; the Y axis in the drawings represents the horizontal direction, and is designated as the front and back position, and the positive direction of the Y axis represents the front side, and the reverse direction of the Y axis represents the back side; the X axis in the drawings represents the left and right position, and the positive direction of the X axis represents the right side, and the reverse direction of the X axis represents the left side. It should also be noted that the aforementioned Z axis, Y axis, and X axis are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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.

[0044] In the related art, during the service of GIL, the cyclic stress-strain state caused by the alternating internal pressure on the structure of the cylinder 3 will affect the fatigue life of the structure and threaten the safety and reliability of equipment operation. Therefore, it is necessary to apply non-destructive testing or structural health monitoring management technology to evaluate the safety performance of the structure. However, traditional non-destructive testing technology has the disadvantages of complex procedures and dependence on the operator's experience level, which is not conducive to accurate monitoring of GIL.

[0045] First, as Figure 1 As shown, an embodiment of the present invention provides a GIL deformation monitoring system based on a capacitive RFID tag, including a passive capacitive RFID tag 1 and a terminal module 2; the passive capacitive RFID tag 1 includes a plate-type capacitive sensor 11, and the plate-type capacitive sensor 11 is used to be attached to the outer wall of the cylinder 3 of the GIL, and the terminal module 2 is wirelessly connected to the passive capacitive RFID tag 1, and is used to: receive capacitance change information transmitted by the plate-type capacitive sensor 11 when the cylinder 3 is deformed; generate deformation data of the plate-type capacitive sensor 11 according to the capacitance change information; generate deformation data of the cylinder 3 according to the deformation data of the plate-type capacitive sensor 11; generate and store deformation monitoring information of the GIL according to the deformation data of the cylinder 3.

[0046] Specifically, radio frequency identification (RFID) is a technology that identifies RFID is a kind of automatic identification technology, which performs non-contact two-way data communication through wireless radio frequency, and uses wireless radio frequency to read and write the recording medium electronic tag or radio frequency card, so as to achieve the purpose of identifying the target and exchanging data; the plate-type capacitance sensor 11 of the passive capacitive RFID tag 1 can be bonded to the outer wall of the cylinder 3 by curing adhesive, and is bent to fit the outer wall of the cylinder 3 completely. Of course, the passive capacitive RFID tag 1 can also be embedded in the inside of the cylinder 3, as long as the deformation of the cylinder 3 can cause the corresponding deformation of the plate-type capacitance sensor 11 of the passive capacitive RFID tag 1; the capacitance change information can be the capacitance change value output by the plate-type capacitance sensor 11, or it can be the real-time capacitance value output by the plate-type capacitance sensor 11; the deformation data of the plate-type capacitance sensor 11 can be the size change value along the radial direction of the cylinder 3, or it can be the size change value along the axial direction of the cylinder 3, and correspondingly, the deformation data of the cylinder 3 can be the size change value along the radial direction, or it can be the size change value along the axial direction.

[0047] In this embodiment, Figure 1 As shown, a passive capacitive RFID tag 1 and a terminal module 2 are provided to form a GIL deformation monitoring system based on a capacitive RFID tag, and the structure is relatively simple, wherein the passive capacitive RFID tag 1 is provided with a plate-type capacitive sensor 11, and the plate-type capacitive sensor 11 can be attached to the outer wall of the cylinder 3 of the GIL, so that when the GIL is deformed, the deformation of the cylinder 3 can cause the deformation of the plate-type capacitive sensor 11, thereby causing the capacitance change information output by the plate-type capacitive sensor 11 to change, and the terminal module 2 is wirelessly connected to the passive capacitive RFID tag 1, and the terminal module 2 can be arranged in an area far away from the GIL, and can accurately receive the capacitance change information output by the plate-type capacitive sensor 11, thereby ensuring the monitoring of the GIL. Stable transmission of original data information; on this basis, the terminal module 2 can first generate the deformation data of the plate-type capacitance sensor 11 according to the capacitance change information, and then generate the deformation data of the cylinder 3 according to the deformation data of the plate-type capacitance sensor 11. On the basis of accurately receiving the capacitance change information, the accuracy of the generated deformation data of the cylinder 3 can be effectively guaranteed, and the terminal module 2 can generate and store the deformation monitoring information of the GIL according to the deformation data of the cylinder 3, which can not only provide accurate deformation monitoring information of the GIL and ensure accurate monitoring of the deformation of the GIL, but also allow operators to retrieve the stored deformation monitoring information of the GIL at any time. The operator can trace the deformation of the GIL, which is convenient for health assessment and maintenance of the GIL.

[0048] Optionally, the passive capacitive RFID tag 1 also includes a transmission unit 12, and the plate-type capacitive sensor 11 includes an anti-metal substrate 111, a proximal capacitor plate 112 and a distal capacitor plate 113, the anti-metal substrate 111 is used to adhere to the outer wall of the cylinder 3, the transmission unit 12, the proximal capacitor plate 112 and the distal capacitor plate 113 are arranged in sequence on the anti-metal substrate 111, the proximal capacitor plate 112 and the distal capacitor plate 113 are parallel to each other, the transmission unit 12 is wirelessly connected to the terminal module 2, and is used to obtain capacitance change information and transmit it to the terminal module 2.

[0049] Specifically, the anti-metal substrate 111 attached to the outer wall of the cylinder 3 can effectively prevent the metal of the cylinder 3 from interfering with the radio frequency signal of the passive capacitive RFID tag 1. The reading distance attached to the metal is farther than that without metal. For example, the anti-metal substrate 111 is made of ceramic.

[0050] In this optional embodiment, if Figure 1 and Figure 2 As shown, an anti-metal substrate 111, a proximal capacitor plate 112 and a distal capacitor plate 113 are provided to form a plate-type capacitive sensor 11, and the passive capacitive RFID tag 1 is also provided with a transmission unit 12, wherein the anti-metal substrate 111 is used to be attached to the outer wall of the cylinder 3, and the transmission unit 12, the proximal capacitor plate 112 and the distal capacitor plate 113 are sequentially arranged on the anti-metal substrate 111 at intervals, and the proximal capacitor plate 112 and the distal capacitor plate 113 are parallel to each other. In this arrangement, when the cylinder 3 is deformed, the anti-metal substrate 111 can be deformed along with the cylinder 3, so that the proximal capacitor plate 112 and the distal capacitor plate 113 can be deformed by the proximal capacitor plate 113. The positions and relative distances between the capacitor plate 112 and the remote capacitor plate 113 change, thereby affecting the capacitance change information output by the plate-type capacitance sensor 11; on this basis, the transmission unit 12 is wirelessly connected to the terminal module 2, and can receive the capacitance change information output by the plate-type capacitance sensor 11 and transmit it to the terminal module 2. With this arrangement, due to the shielding characteristics of the anti-metal substrate 111, the transmission unit 12 can accurately and quickly obtain the capacitance change information output by the plate-type capacitance sensor 11, and can also accurately transmit it to the terminal module 2 over a long distance, effectively ensuring the accuracy of GIL deformation monitoring.

[0051] Optionally, there are multiple passive capacitive RFID tags 1 , and the multiple passive capacitive RFID tags 1 are used to be evenly distributed along the axial direction of the cylinder 3 , and / or the multiple passive capacitive RFID tags 1 are used to be evenly distributed along the circumferential direction of the cylinder 3 .

[0052] Specifically, for example, Figure 2 and Figure 3As shown, there are 16 passive capacitive RFID tags 1, which are equally divided into two groups. The two groups of passive capacitive RFID tags 1 are equally spaced along the axial direction of the cylinder 3, and the passive capacitive RFID tags 1 of any group are equally spaced along the circumferential direction of the cylinder 3.

[0053] In this optional embodiment, in order to solve the problem that it is difficult to fully monitor the deformation of the GIL in the prior art, as shown in FIG. Figure 2 and Figure 3 A plurality of passive capacitive RFID tags 1 are arranged, wherein the plurality of passive capacitive RFID tags 1 can be evenly spaced along the axial direction of the cylinder 3. With this arrangement, the deformation of a plurality of points along the axial direction of the cylinder 3 can be monitored through the terminal module 2 and the passive capacitive RFID tag 1, thereby realizing comprehensive monitoring of the deformation of the GIL, and facilitating the operator to more accurately obtain evaluation opinions and control measures on the structural health status of the GIL.

[0054] In this optional embodiment or other embodiments of the present invention, multiple passive capacitive RFID tags 1 can be evenly distributed along the circumferential direction of the cylinder 3, so that the deformation of multiple points along the circumferential direction of the cylinder 3 can be monitored through the terminal module 2 and the passive capacitive RFID tag 1, thereby further improving the comprehensiveness of the deformation monitoring of the GIL.

[0055] Optionally, the transmission unit 12 includes a passive RFID tag antenna and a RFID tag chip, the RFID tag chip is wirelessly connected to the terminal module 2 via the passive RFID tag antenna, and the RFID tag chip is used to transmit the identity information, spatial position information and capacitance change information of the passive capacitive RFID tag 1 to the terminal module 2.

[0056] Specifically, the RFID tag chip is a dedicated chip, which meets the impedance matching conditions during design, and receives the capacitance change information of the plate-type capacitive sensor 11, thereby forming a load adjustment signal to transmit the monitoring signal through the passive RFID tag antenna; the passive RFID tag antenna serves as an uplink sensing component, and mainly receives the excitation signal of the terminal module 2 through electromagnetic induction or radiation effect, thereby exciting the RFID tag chip and the plate-type capacitive sensor 11, and uploads the capacitance change information obtained by the RFID tag chip to the terminal module 2 in the form of a load modulation signal; the identity information of the passive capacitive RFID tag 1 can be data information such as the component ID that can play a role in distinguishing the identity; the spatial position information can be the relative spatial position information of multiple passive capacitive RFID tags 1 with respect to each other. For example, it can be the relative distance between multiple passive capacitive RFID tags 1 or the distance relative to a fixed point. Of course, the spatial position information can also be the spatial position information of multiple passive capacitive RFID tags 1 relative to the cylinder 3.

[0057] In this optional embodiment, in order to achieve accurate and comprehensive monitoring of the deformation of the GIL, while arranging multiple passive capacitive RFID tags 1 on the cylinder 3, a passive radio frequency tag antenna and a radio frequency tag chip are also provided to form a transmission unit 12, wherein the radio frequency tag chip can be wirelessly connected to the terminal module 2 via the passive radio frequency tag antenna, and can transmit the identity information, spatial position information and capacitance change information of the passive capacitive RFID tag 1 to the terminal module 2. With this arrangement, when integrating the deformation data of the cylinder 3, the specific location where the deformation occurs on the cylinder 3 can be determined in combination with the identity information and spatial position information of different passive capacitive RFID tags 1, and then the deformation condition of a specific location on the cylinder 3 can be obtained in combination with the capacitance change information, thereby obtaining comprehensive and accurate GIL deformation data information, thereby achieving accurate and comprehensive monitoring of the deformation of the GIL.

[0058] Optionally, the terminal module 2 includes an analysis and processing unit 21, which is wirelessly connected to the transmission unit 12 and is used to generate deformation data of the plate-type capacitance sensor 11 according to the capacitance change information and the following formula:

[0059]

[0060] Among them, ΔC is the capacitance change, ε is the dielectric constant of the medium between the proximal capacitor plate 112 and the distal capacitor plate 113, H is the height of the proximal capacitor plate 112 and the distal capacitor plate 113, T is the ambient temperature between the proximal capacitor plate 112 and the distal capacitor plate 113, S is the facing area of ​​the proximal capacitor plate 112 and the distal capacitor plate 113, Δd is the distance between the proximal capacitor plate 112 and the distal capacitor plate 113, k is the electrostatic force constant, and π is the pi.

[0061] Specifically, the analysis and processing unit 21 stores the geometric and electromagnetic characteristic parameters of the passive capacitive RFID tag 1 , and by way of example, the geometric and electromagnetic characteristic parameters include ε, k, π, S, and the like.

[0062] In this optional embodiment, if Figure 1 As shown, in order to ensure the accuracy of the deformation data generated by the plate-type capacitive sensor 11, the terminal module 2 is provided with an analysis and processing unit 21, which can receive the capacitance change information transmitted by the transmission unit 12, obtain the capacitance change ΔC, and then obtain the deformation data of the plate-type capacitive sensor 11 according to the corresponding formula of ΔC and S, Δd and other geometric data of the plate-type capacitive sensor 11, and determine the axial / circumferential strain of the cylinder 3 with reference to the geometric and electromagnetic characteristic parameters of the passive capacitive RFID tag 1 and the stress-strain characteristics of the cylinder 3, so as to ensure the accuracy of the deformation data of the plate-type capacitive sensor 11, and then ensure the accuracy of the deformation data of the cylinder 3 generated subsequently.

[0063] Optionally, the analysis and processing unit 21 is used to obtain S and Δd according to the following formula:

[0064] S=(D0-L0*sin(θ))*H

[0065] Δd=D0*sin(θ)

[0066] Among them, D0 is the length of the proximal capacitor plate 112, L0 is the length of the distal capacitor plate 113, θ is the deflection angle of the proximal capacitor plate 112 and the distal capacitor plate 113 or the deflection angle of the pole arms of the two, the pole arm of the proximal capacitor plate 112 is the perpendicular line from the transmission unit 12 to the proximal capacitor plate 112, and the pole arm of the distal capacitor plate 113 is the perpendicular line from the transmission unit 12 to the distal capacitor plate 113.

[0067] Specifically, the geometric and electromagnetic characteristic parameters of the passive capacitive RFID tag 1 stored in the analysis and processing unit 21 also include D0, H, θ and L0, etc.; Figure 4 As shown, before the passive capacitive RFID tag 1 is deformed, a0 is the arm of the proximal capacitor plate 112, and b0 is the arm of the distal capacitor plate 113. Correspondingly, after the passive capacitive RFID tag 1 is deformed, c0 is the proximal capacitor plate 112, c1 is the distal capacitor plate 113, a1 is the arm of the proximal capacitor plate 112, b1 is the arm of the distal capacitor plate 113, the angle between a0 and a1 is the deflection angle of the proximal capacitor plate 112, and the angle between b0 and b1 is the deflection angle of the distal capacitor plate 113.

[0068] In this optional embodiment, in order to further improve the accuracy of the deformation data of the plate-type capacitive sensor 11, the geometric data such as the length of the proximal capacitor plate 112, the length of the distal capacitor plate 113, the height of the proximal capacitor plate 112 and the distal capacitor plate 113, and the deflection angle of the proximal capacitor plate 112 and the distal capacitor plate 113 or the deflection angle of the pole arms of the two are combined with the generation formula of S and Δd to obtain accurate S and Δd, thereby ensuring the accuracy of the deformation data of the plate-type capacitive sensor 11, and further ensuring the accuracy of the deformation data of the cylinder 3 generated subsequently.

[0069] Optionally, the passive capacitive RFID tag 1 also includes an environment sensing unit, which includes at least one of a thermal sensitive element, a pressure sensitive element, an electrical sensitive element or a light sensitive element. The environment sensing unit is wirelessly connected to the analysis and processing unit 21, and is used to obtain environmental sensing data around the plate-type capacitive sensor 11 and transmit it to the analysis and processing unit 21, so that the analysis and processing unit 21 can correct ε according to the environmental sensing data.

[0070] Specifically, the environment sensing unit is disposed on the anti-metal substrate 111 of the plate-type capacitive sensor 11 of the passive capacitive RFID tag 1; the heat-sensitive element, pressure-sensitive element, electrical-sensitive element or light-sensitive element are all sensing elements such as sensor chips.

[0071] In this optional embodiment, in order to further improve the accuracy of the deformation data of the plate-type capacitive sensor 11, the passive capacitive RFID tag 1 is also provided with an environmental sensing unit. Considering that the dielectric constant ε of the plate-type capacitive sensor 11 is easily affected by environmental factors such as temperature, an environmental sensing unit composed of at least one of a thermal sensitive element, a pressure sensitive element, an electrical sensitive element or a light sensitive element is provided to obtain the environmental sensing data around the plate-type capacitive sensor 11 in real time, and transmit it to the analysis and processing unit 21 via wireless transmission, so that the analysis and processing unit 21 can subsequently correct ε according to the change value of the environmental sensing data, thereby ensuring the accuracy of the deformation data of the plate-type capacitive sensor 11.

[0072] Optionally, the terminal module 2 also includes a radio frequency reader / writer 22, which is wirelessly connected to the analysis and processing unit 21 and the transmission unit 12 respectively, and is used to transmit the excitation signal to the plate-type capacitive sensor 11 through the transmission unit 12, and is used to transmit capacitance change information to the analysis and processing unit 21.

[0073] Specifically, the radio frequency reader 22 serves as an active repeater of the GIL deformation monitoring system based on the capacitive RFID tag, and mainly realizes non-contact communication with the passive capacitive RFID tag 1 by electromagnetic induction or radiation, thereby realizing the transmission of electromagnetic excitation energy and load modulation signal with the passive capacitive RFID tag 1, and uploading it to the analysis and processing unit 21.

[0074] In this optional embodiment, in order to ensure the stability of information data transmission, the terminal module 2 is further provided with a radio frequency reader 22, and the radio frequency reader 22 is used to transmit and receive information data, thereby effectively ensuring the stability of information data transmission.

[0075] It should be noted that in the present invention, the terminal module 2 is also provided with a mobile terminal and / or a fixed terminal. After the terminal module 2 generates the deformation monitoring information of the GIL, the structural health status of the GIL can be inverted and stored in the analysis and processing unit 21, forming a historical service status account of the GIL, which is convenient for the evaluation, analysis and management of the GIL throughout its life cycle. At the same time, the operator can read the passive capacitive RFID tag 1 and the digitized information used for monitoring / transmission / analysis of the analysis and processing unit 21 storage system in real time at the location of the GIL through a mobile terminal such as a radio frequency reader or a portable mobile terminal, and obtain the deformation data of the cylinder 3. The deformation data obtained through analysis and the corresponding monitoring, evaluation and control measures are stored in the analysis and processing unit 21. Correspondingly, the operator can also remotely obtain the deformation data of the GIL and the corresponding monitoring, evaluation and control measures in real time through the fixed terminal, so as to realize the real-time, comprehensive and accurate monitoring of the GIL deformation.

[0076] For example, the GIL deformation monitoring system based on capacitive RFID tag of the present invention is used to monitor the deformation of 500kV GIL in the substation. The monitoring is continuous for 24 hours. The highest temperature of the GIL surface is 23.1°C and the lowest temperature is 8.9°C. Specifically, on the one hand, the axial expansion and contraction of the cylinder 3 is monitored, such as Figure 6 As shown, the monitoring start time is from 14:52 on November 27, 2024 to 14:23 on November 28, 2024, and the expansion amount is: 0mm~0.1mm. The expansion amount change is less affected by the ambient temperature, and no abnormality is found in the 24-hour expansion amount detection; on the other hand, the radial expansion amount of the cylinder 3 is monitored, such as Figure 7 As shown in the figure, the monitoring start time is from 14:52 on November 27, 2024 to 14:23 on November 28, 2024, the expansion amount is 0mm~0.2mm, the expansion amount change is less affected by the ambient temperature, and no abnormality is found in the 24-hour expansion amount detection. In summary, the monitoring report can be obtained: the deformation amount does not change significantly with the ambient temperature, among which the axial deformation amount is: 0mm~0.1mm, the radial deformation amount is: 0mm~0.2mm, and no abnormality is found in the 24-hour deformation amount detection.

[0077] Second, as Figure 5As shown, an embodiment of the present invention provides a GIL deformation monitoring method based on a passive capacitive RFID tag, which is applied to the above-mentioned GIL deformation monitoring system based on a capacitive RFID tag. The GIL deformation monitoring method based on a passive capacitive RFID tag includes the following steps: when the cylinder 3 of the GIL is deformed, the capacitance change information is generated by the plate-type capacitance sensor 11 of the passive capacitive RFID tag 1 of the GIL deformation monitoring system based on the capacitive RFID tag; the capacitance change information is transmitted to the terminal module 2 of the GIL deformation monitoring system based on the capacitive RFID tag through the plate-type capacitance sensor 11, and the deformation data of the plate-type capacitance sensor 11 is generated through the terminal module 2 and the capacitance change information; the deformation data of the cylinder 3 is generated through the deformation data of the terminal module 2 and the plate-type capacitance sensor 11; the deformation monitoring information of the GIL is generated through the deformation data of the terminal module 2 and the cylinder 3, and stored in the terminal module 2.

[0078] like Figure 5 As shown, the technical effect of the GIL deformation monitoring method based on the passive capacitive RFID tag in this embodiment is similar to the technical effect of the GIL deformation monitoring system based on the capacitive RFID tag mentioned above, which will not be repeated here.

[0079] In a third aspect, an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the above-mentioned GIL deformation monitoring method based on a passive capacitive RFID tag is implemented.

[0080] The technical effect of the computer-readable storage medium in this embodiment is similar to the technical effect of the above-mentioned GIL deformation monitoring method based on passive capacitive RFID tag, which will not be repeated here.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A GIL deformation monitoring system based on capacitive RFID tags, characterized in that: The invention comprises a passive capacitive RFID tag (1) and a terminal module (2); the passive capacitive RFID tag (1) comprises a plate-type capacitive sensor (11), the plate-type capacitive sensor (11) is used to be attached to the outer wall of a cylinder (3) of a GIL, and the terminal module (2) is wirelessly connected to the passive capacitive RFID tag (1) and is used to: When the cylinder (3) is deformed, receiving capacitance change information transmitted by the plate-type capacitance sensor (11); Generating deformation data of the plate-type capacitance sensor (11) according to the capacitance change information; generating deformation data of the cylinder (3) according to the deformation data of the plate-type capacitance sensor (11); Deformation monitoring information of the GIL is generated and stored based on the deformation data of the cylinder (3).

2. The GIL deformation monitoring system based on capacitive RFID tag according to claim 1, characterized in that: The passive capacitive RFID tag (1) further comprises a transmission unit (12); the plate-type capacitive sensor (11) comprises an anti-metal substrate (111), a proximal capacitor plate (112) and a distal capacitor plate (113); the anti-metal substrate (111) is used to be attached to the outer wall of the cylinder (3); the transmission unit (12), the proximal capacitor plate (112) and the distal capacitor plate (113) are sequentially arranged at intervals on the anti-metal substrate (111); the proximal capacitor plate (112) and the distal capacitor plate (113) are parallel to each other; the transmission unit (12) is wirelessly connected to the terminal module (2) and is used to obtain the capacitance change information and transmit it to the terminal module (2).

3. The GIL deformation monitoring system based on capacitive RFID tag according to claim 2, characterized in that: The passive capacitive RFID tags (1) are multiple, and the multiple passive capacitive RFID tags (1) are used to be evenly distributed along the axial direction of the cylinder (3), and / or the multiple passive capacitive RFID tags (1) are used to be evenly distributed along the circumferential direction of the cylinder (3).

4. The GIL deformation monitoring system based on capacitive RFID tag according to claim 3, characterized in that: The transmission unit (12) comprises a passive radio frequency tag antenna and a radio frequency tag chip, the radio frequency tag chip being wirelessly connected to the terminal module (2) via the passive radio frequency tag antenna, and the radio frequency tag chip being used to transmit the identity information, spatial position information and capacitance change information of the passive capacitive RFID tag (1) to the terminal module (2).

5. The GIL deformation monitoring system based on capacitive RFID tag according to claim 2, characterized in that: The terminal module (2) comprises an analysis and processing unit (21), the analysis and processing unit (21) being wirelessly connected to the transmission unit (12) and used to generate deformation data of the plate-type capacitance sensor (11) according to the capacitance change information and the following formula: Wherein, ΔC is the capacitance change, ε is the dielectric constant of the medium between the proximal capacitor plate (112) and the distal capacitor plate (113), H is the height of the proximal capacitor plate (112) and the distal capacitor plate (113), T is the ambient temperature between the proximal capacitor plate (112) and the distal capacitor plate (113), S is the facing area of ​​the proximal capacitor plate (112) and the distal capacitor plate (113), Δd is the distance between the proximal capacitor plate (112) and the distal capacitor plate (113), k is the electrostatic force constant, and π is the circumference of a circle.

6. The GIL deformation monitoring system based on capacitive RFID tag according to claim 5, characterized in that: The analysis and processing unit (21) is used to obtain the S and the Δd according to the following formula: S=(D0-L0*sin(θ))*H Δd=D0*sin(θ) Wherein, D0 is the length of the proximal capacitor plate (112), L0 is the length of the distal capacitor plate (113), θ is the deflection angle of the proximal capacitor plate (112) and the distal capacitor plate (113) or the deflection angle of the pole arms of the two, the pole arm of the proximal capacitor plate (112) is the perpendicular line from the transmission unit (12) to the proximal capacitor plate (112), and the pole arm of the distal capacitor plate (113) is the perpendicular line from the transmission unit (12) to the distal capacitor plate (113).

7. The GIL deformation monitoring system based on capacitive RFID tag according to claim 5, characterized in that: The passive capacitive RFID tag (1) further comprises an environment sensing unit, the environment sensing unit comprising at least one of a thermal sensing element, a pressure sensing element, an electrical sensing element or a light sensing element, the environment sensing unit being wirelessly connected to the analysis and processing unit (21) and used for acquiring environment sensing data around the plate-type capacitive sensor (11) and transmitting the data to the analysis and processing unit (21), so that the analysis and processing unit (21) can correct the ε according to the environment sensing data.

8. The GIL deformation monitoring system based on capacitive RFID tag according to claim 5, characterized in that: The terminal module (2) further comprises a radio frequency reader / writer (22), the radio frequency reader / writer (22) being wirelessly connected to the analysis and processing unit (21) and the transmission unit (12), respectively, and the radio frequency reader / writer (22) being used to transmit an excitation signal to the plate-type capacitance sensor (11) via the transmission unit (12), and to transmit the capacitance change information to the analysis and processing unit (21).

9. A GIL deformation monitoring method based on passive capacitive RFID tag, characterized in that: Applied to the GIL deformation monitoring system based on capacitive RFID tags as described in any one of claims 1 to 8, the GIL deformation monitoring method based on passive capacitive RFID tags comprises the following steps: When the cylinder (3) of the GIL is deformed, a plate-type capacitance sensor (11) of a passive capacitive RFID tag (1) of a GIL deformation monitoring system based on a capacitive RFID tag generates capacitance change information; Transmitting the capacitance change information to a terminal module (2) of the GIL deformation monitoring system based on a capacitive RFID tag via the plate-type capacitance sensor (11), and generating deformation data of the plate-type capacitance sensor (11) via the terminal module (2) and the capacitance change information; Generating deformation data of the cylinder (3) through deformation data of the terminal module (2) and the plate-type capacitance sensor (11); Deformation monitoring information of the GIL is generated through deformation data of the terminal module (2) and the cylinder (3), and is stored in the terminal module (2).

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the GIL deformation monitoring method based on a passive capacitive RFID tag as claimed in claim 9 is implemented.

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