CN212540609U - High-voltage board box wall integral type acousto-optic electromagnetic composite sensor - Google Patents
High-voltage board box wall integral type acousto-optic electromagnetic composite sensor Download PDFInfo
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- CN212540609U CN212540609U CN202022180593.8U CN202022180593U CN212540609U CN 212540609 U CN212540609 U CN 212540609U CN 202022180593 U CN202022180593 U CN 202022180593U CN 212540609 U CN212540609 U CN 212540609U
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Abstract
The utility model relates to a high-voltage board box wall integral type sound photoelectromagnetic composite sensor, sensor include complementary dipole double-patch type antenna, transient state earth voltage probe, ultrasonic probe and optical probe, complementary dipole double-patch type antenna includes the insulating boot to and insulation board and metal patch subassembly, transient state earth voltage probe includes two insulating pieces and two transient states earth voltage metal patches, ultrasonic probe includes the PZT sensor with the outer wall connection of cubical switchboard tank wall, optical probe includes that the symmetry ring distributes in a plurality of fluorescence optic fibre in the insulating boot outside. Compared with the prior art, the device has the advantages of simple design and convenient processing, realizes ultrahigh frequency, transient voltage to ground, ultrasonic and optical synchronous combined measurement of electromagnetic waves, ultrasonic waves and optical pulse signals generated by insulation defect discharge of internal components of the high-voltage switch cabinet, realizes live detection/routing inspection, and can also provide signals for an online monitoring device or an intensive care system.
Description
Technical Field
The utility model belongs to the technical field of high tension switchgear partial discharge detection and specifically relates to a high tension cabinet box wall integral type acoustooptic photoelectromagnetic composite sensor is related to.
Background
The high-voltage switch cabinet is direct equipment of a power distribution network for supplying power to users, and the failure of the high-voltage switch cabinet can cause the power failure of the users, thereby bringing huge economic loss to the power distribution network and causing certain social influence; in addition, under the policy of creating a good operator environment, ensuring high-quality reliable power supply is a necessary way for guaranteeing operation and maintenance of a power grid. Because high tension switchgear inner structure is complicated, insulating interval is little, leads to it to appear insulating defect more easily than other electrical equipment in the electric wire netting, takes place Partial Discharge (PD) phenomena such as equipment insulating surface creepage under the condition of the condensation of weing. The long-term existence of PD can eventually lead to the insulation aging or deterioration or even damage of the equipment, which eventually develops into an insulation breakdown accident of the high-voltage switch cabinet. Therefore, it is very important to judge the insulation state through PD on-line monitoring and live detection of the high-voltage switch cabinet.
At present, methods applied to detecting PD signals of a high-voltage switch cabinet mainly include an ultrasonic wave (AE) detection method, a transient voltage To Earth (TEV) detection method, an ultrahigh frequency (UHF) detection method, and the like, and an Optical Pulse (OP) detection method is not reported. The ultrasonic detection method has been applied for many years, and forms the general technical conditions of the ultrasonic method partial discharge tester 2015 DL/T1416 in the electric power industry standard. Transient voltage-to-ground voltage detection has been applied for many years to section 10 of the 2016 DL/T846.10 general technical Condition for high Voltage test Equipment: transient ground voltage partial discharge detection, 2018 DL/T195 local discharge detector calibration standard based on transient ground voltage method. The PD in the switch cabinet can generate electromagnetic waves, skin effect is formed on the metal wall and the electromagnetic waves are propagated along the metal surface, meanwhile, transient voltage to ground is generated on the metal surface, and signal detection or monitoring can be achieved by using a special transient voltage to ground voltage sensor in the prior art. The ultrahigh frequency is a new technology developed in recent years, which judges whether equipment has PD or not by measuring electromagnetic waves radiated by insulation hidden troubles of high-voltage equipment under operating voltage, and the method can be used for non-contact measurement and is widely applied to online detection of electrical equipment; for the self characteristics of the high-voltage switch cabinet equipment, as shown in fig. 8(a) - (d), there are ultrahigh frequency detection sensors of a metal radiation patch, a reconfigurable antenna (square annular microstrip patch), a microstrip slot antenna and a snowflake type microstrip antenna.
The ultrasonic and transient voltage-to-ground detection is external and is easily interfered by external electromagnetic, so that detection personnel often suspects the detection result and cannot judge whether ultrasonic signals and electromagnetic signals are from the inside of a high-voltage switch cabinet or generated by an interference source, and thus serious short-circuit faults occur due to insulation breakdown caused by missing internal discharge signals. Above-mentioned existing superfrequency technique, sensor processing is comparatively complicated, is inconvenient to use widely at equipment manufacturer, and the installation also needs certain special condition, and this has restricted this superfrequency detection method greatly and has used in on-line monitoring, the live-line detection of high tension switchgear equipment insulation defect PD.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high-voltage board tank wall integral type acoustoelectric-optic-electromagnetic composite sensor in order to overcome the defect that above-mentioned prior art exists.
The purpose of the utility model can be realized through the following technical scheme:
a high-voltage cabinet wall integrated acousto-optic electromagnetic composite sensor comprises a complementary dipole double-patch antenna, a transient voltage-to-earth voltage probe, an ultrasonic probe and an optical probe, wherein the complementary dipole double-patch antenna comprises an insulating cover, an insulating plate and a metal patch component, the metal patch component comprises a first metal patch and a second metal patch which are the same, one surface of the insulating plate is connected with the inner wall of a switch cabinet wall, the other surface of the insulating plate is symmetrically connected with the first metal patch and the second metal patch, the insulating plate, the first metal patch and the second metal patch are arranged in a first cavity formed by the insulating cover and the inner wall of the switch cabinet wall, a gap is formed between the first metal patch and the second metal patch, the insulating plate is provided with a first through hole, the switch cabinet wall is provided with a second through hole, the gap, the first through hole and the second through hole are coaxial, one end of a first coaxial cable is respectively connected with the first metal patch and the second metal patch in a, the other end of the ultrasonic probe is in conduction connection with a first coaxial cable joint sequentially through a gap, a first through hole and a second through hole, the transient voltage-to-earth voltage probe comprises two insulating sheets and two transient voltage-to-earth voltage metal patches, the insulating sheets and the transient voltage-to-earth voltage metal patches are alternately arranged and connected with each other, one of the insulating sheets is connected with the wall of the switch cabinet, one end of a cable core of the second coaxial cable is in conduction connection with the transient voltage-to-earth voltage metal patches on the outer side, the other end of the cable core of the second coaxial cable is in conduction connection with a second coaxial cable joint, a shielding layer of the second coaxial cable is in conduction connection with the transient voltage-to-earth voltage metal patches on the inner side and the working side of an inductor, the ultrasonic probe comprises a PZT sensor connected with the outer wall of the switch cabinet, the PZT, transient state is to ground voltage probe and ultrasonic probe and is located the second cavity that first metal covering formed with the outer wall of cubical switchboard tank wall, the second through-hole is located the coverage of first metal covering, first coaxial cable joint and the first metal covering of third coaxial cable joint conducting connection, the first metal covering of second coaxial cable joint insulating connection, the first metal covering of ground connection side conducting connection of inductance, optical probe includes that symmetrical ring distributes in a plurality of fluorescence optic fibre in the insulating cover outside, and a plurality of fluorescence optic fibre connect the coupler of ring central authorities through a plurality of couplers that correspond, and single mode fiber passes third through-hole, clearance, first through-hole and the second through-hole conducting connection of insulating cover in proper order and the fiber connector of first metal covering conducting connection, fiber connector and first metal covering conducting connection.
The optical probe comprises 8 fluorescent fibers which are symmetrically distributed on the outer side of the insulating cover in a circular ring mode, and the 8 fluorescent fibers are connected with the coupler in the center of the circular ring through corresponding 8 connectors.
A plurality of fluorescence optic fibre symmetry rings distribute in the organic glass board, organic glass board fixed connection insulating boot, the insulation board is the polyethylene insulation board, the insulation piece be the phenolic plastic insulating piece.
The second coaxial cable connector is connected with the first metal cover through the insulating gasket.
The insulation cover is connected with the wall of the switch cabinet through an insulation bolt, the first metal cover is connected with the wall of the switch cabinet through a metal bolt, and the second metal cover is connected with the wall of the switch cabinet through a metal bolt.
The first coaxial cable connector is connected with the first metal cover through a metal bolt, the second coaxial cable connector is connected with the first metal cover through an insulating bolt, the third coaxial cable connector is connected with the first metal cover through a metal bolt, and the optical fiber connector is connected with the first metal cover through a metal bolt.
One end of a cable core wire of the first coaxial cable is connected with the second metal patch, and the shielding layer of the first coaxial cable is connected with the first metal patch.
The insulation board bond with first metal paster and second metal paster respectively, the insulating piece bonds with transient state earth voltage metal paster, an insulating piece bonds with the cubical switchboard box wall, the insulation board bonds with the cubical switchboard box wall.
The first metal patch, the second metal patch and the two transient-state voltage-to-earth metal patches are all copper patches.
A method for installing the high-voltage cabinet wall integrated acoustic-optical-electric-magnetic composite sensor comprises the following steps:
step S1: one end of the first coaxial cable is respectively connected with the feed points of the first metal patch and the second metal patch in a conducting manner;
step S2: one surface of the insulating plate is symmetrically connected with the first metal patch and the second metal patch, the other surface of the insulating plate is connected with the inner wall of the switch cabinet, and the second through hole, the gap and the first through hole are coaxial;
step S3: the insulating cover is connected with the inner wall of the switch cabinet;
step S4: the other end of the first coaxial cable is connected with a first coaxial cable connector in a conduction mode;
step S5: the plurality of fluorescent optical fibers are symmetrically distributed on the outer side of the insulating cover and are correspondingly connected with a plurality of couplers, the plurality of couplers are connected with a coupler positioned in the center of the ring, the coupler is connected with a single-mode optical fiber, and the single-mode optical fiber sequentially penetrates through the third through hole, the gap, the first through hole and the second through hole to be connected with an optical fiber connector in a conduction mode;
step S6: the two insulation sheets and the two transient voltage-to-earth metal patches are alternately arranged and connected, and one insulation sheet is connected with the outer wall of the box wall of the switch cabinet;
step S7: one end of a cable core wire of the second coaxial cable is in conductive connection with the transient voltage-to-earth voltage metal patch on the outer side, the other end of the cable core wire of the second coaxial cable is in conductive connection with the second coaxial cable connector, and the shielding layer of the second coaxial cable is in conductive connection with the transient voltage-to-earth voltage metal patch on the inner side and the working side of the inductor;
step S8: the PZT sensor is connected with the outer wall of the switch cabinet, and the second metal cover is connected with the outer wall of the switch cabinet in a conduction manner;
step S9: the grounding side of the inductor is connected with the first metal cover in a conduction mode, the optical fiber connector, the first coaxial cable connector and the third coaxial cable connector are connected with the first metal cover in a conduction mode, the second coaxial cable connector is connected with the first metal cover in an insulation mode, and the first metal cover is connected with the outer wall of the switch cabinet.
Compared with the prior art, the utility model has the advantages of it is following:
(1) the complementary dipole double-patch antenna, the capacitive voltage divider, the PZT sensor and the fluorescence optical fiber enhanced photodetector are respectively used as an ultrahigh frequency probe, a transient voltage-to-ground voltage probe, an ultrasonic probe and an optical probe of the acousto-optic electromagnetic composite sensor, the design is simple, the processing is convenient, and the ultrahigh frequency, transient voltage-to-ground voltage, ultrasonic and optical synchronous combined measurement of electromagnetic waves, ultrasonic waves and optical pulse signals generated by the insulation defect discharge of components in the high-voltage switch cabinet is realized.
(2) The acousto-optic electromagnetic composite sensor is easy to install (replacement or removal can be referred to) and has few steps, the application range of the acousto-optic electromagnetic composite sensor is greatly expanded, and a reliable implementation method is provided for integration, modularization and standardization of an equipment sensing unit.
(3) The acousto-optic-electromagnetic composite sensor utilizes the inductor to block the mutual influence of the transmission of high-frequency electromagnetic wave signals, 2 paths of output electromagnetic wave signals, 1 path of output optical pulse signals and ultrasonic wave signals with time difference delta t can be mutually proved, whether the current detection signals are from the defect discharge of the internal insulation of the high-voltage switch cabinet or not can be confirmed, and the serious short-circuit fault caused by insulation breakdown due to the missing of the internal discharge signals can be avoided.
(4) The formed acousto-optic-electro-magnetic composite sensor utilizes the switch cabinet box body as a ground plane, 4 signal output terminals can be operated under the live operation working condition, live detection/inspection is realized, and signals can be provided for an online monitoring device or an intensive care system.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of the present invention;
fig. 3 is a schematic view of the installation structure of the present invention;
FIG. 4 is a schematic diagram of the transient voltage-to-ground voltage probe of the present invention;
FIG. 5 is a schematic diagram of the optical probe of the present invention;
fig. 6(a) - (i) are schematic diagrams of the installation steps of the electromagnetic composite sensor of the present invention;
fig. 7(a) - (c) are 4 paths of single discharge detection time domain signals of the electromagnetic composite sensor of the present invention under different pressurization conditions;
FIG. 8(a) is a prior art metallic radiating patch UHF sensor;
FIG. 8(b) is a prior art square ring microstrip patch UHF sensor;
FIG. 8(c) is a prior art UHF sensor with microstrip slot antenna;
FIG. 8(d) is a very high frequency sensor of snowflake type microstrip antenna in the prior art;
reference numerals:
1 is an insulating plate; 2 is a first metal patch; 3 is a second metal patch; 4 is an insulating cover; 5, the wall of the switch cabinet; 6 is a first coaxial cable joint; 7 is a feeding point; 8 is a connector with a coaxial cable; 9 is the resistance of the grounding wire of the switch cabinet; 10 is a discharge source; 11 is a first coaxial cable; 12 is a second coaxial cable; 13 is a first through hole; 14 is a second through hole; 15 is a signal acquisition device; 16 is an insulating sheet; 17 is a transient voltage-to-ground metal patch; 18 is an inductor; 19 is a third coaxial cable; 20 is a first metal cover; 21 is a second coaxial cable connector; 22 is an insulating washer; 23 is a third coaxial cable connector; 24 is a second metal cover; 25 is PZT sensor; 26 is a fluorescent optical fiber; 27 is a coupler; 28 is a coupler; 29 is a third through hole; 30 is an optical fiber connector; 31 is an organic glass plate; 32 is a single mode optical fiber.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Examples
The embodiment provides an integrated acousto-optic-electro-magnetic composite sensor for a high-voltage switch cabinet wall, which comprises a complementary dipole double-patch type antenna which is formed by an insulating cover 4, a first metal patch 2, a second metal patch 3, an insulating plate 1, a first coaxial cable joint 6 and a high-voltage switch cabinet wall 5 and is used for coupling ultrahigh-frequency electromagnetic wave signals, wherein the complementary dipole double-patch type antenna is shown in figure 1; the capacitive voltage division type transient voltage-to-ground voltage probe capable of coupling electromagnetic wave signals is composed of two transient voltage-to-ground voltage metal patches 17, two insulating sheets 16, an inductor 18, a second coaxial cable connector 21, a first metal cover 20 and the high-voltage switch cabinet wall 5; the PZT sensor 25, the second metal cover 24, the third coaxial cable joint 23 and the high-voltage switch cabinet wall 5 form an ultrasonic probe which can be coupled with ultrasonic signals; an optical probe which is arranged on the insulating cover 4 and is composed of a plurality of fluorescent optical fibers 26 in parallel and used for detecting an optical pulse signal; therefore, the integrated acoustic-optical electromagnetic composite sensor for the wall of the high-voltage switch cabinet, which realizes the ultrahigh frequency, transient voltage to ground, ultrasonic and optical synchronous combined measurement of electromagnetic waves, ultrasonic waves and optical pulse signals generated by the insulation defect discharge of the components in the high-voltage switch cabinet, is formed.
Specifically, the method comprises the following steps:
one side of insulation board 1 connects the inner wall of cubical switchboard tank wall 5, another side symmetric connection first metal paster 2 and second metal paster 3, insulation board 1, the first cavity that insulating boot 4 and cubical switchboard tank wall 5's inner wall formed is arranged in to first metal paster 2 and second metal paster 3, form the clearance between first metal paster 2 and the second metal paster 3, insulation board 1 is equipped with first through-hole 13, cubical switchboard tank wall 5 is equipped with second through-hole 14, the clearance, first through-hole 13 and second through-hole 14 are coaxial, the one end of first coaxial cable 11 switches on respectively connects first metal paster 2 and second metal paster 3, the other end loops through the clearance, first through-hole 13 and second through-hole 14 switch on connects first coaxial cable joint 6.
The insulation sheets 16 and the transient state voltage-to-earth metal patches 17 are alternately arranged and connected with each other, one insulation sheet 16 is connected with the switch cabinet wall 5, one end of the cable core of the second coaxial cable 12 is conductively connected with the transient state voltage-to-earth metal patch 17 on the outer side, the other end of the cable core is conductively connected with the second coaxial cable connector 21, and the shielding layer of the second coaxial cable 12 is conductively connected with the transient state voltage-to-earth metal patch 17 on the inner side and the working side of the inductor 18.
The PZT sensor 25 is located in a third cavity formed by conducting and connecting the first metal cover 20 and the outer wall of the switch cabinet wall 5, the PZT sensor 25 is connected with a third coaxial cable connector 23 in a conducting manner, the transient voltage-to-ground voltage probe and the ultrasonic probe are located in a second cavity formed by the first metal cover 20 and the outer wall of the switch cabinet wall 5, the second through hole 14 is located in the coverage range of the first metal cover 20, the first coaxial cable connector 6 and the third coaxial cable connector 23 are connected with the first metal cover 20 in a conducting manner, the second coaxial cable connector 21 is connected with the first metal cover 20 in an insulating manner, and the grounding side of the inductor 18 is connected with the first metal cover 20 in a conducting manner.
The optical probe comprises a plurality of fluorescent fibers 26 which are distributed on the outer side of the insulating cover 4 in a symmetrical circular ring manner, the fluorescent fibers 26 are connected with a coupler 28 at the center of the circular ring via a plurality of corresponding couplers 27, and a single-mode fiber 32 sequentially penetrates through a third through hole 29, a gap, a first through hole 13 and a second through hole 14 of the insulating cover 4 to be connected with a fiber connector 30 which is connected with the first metal cover 20 in a conduction manner.
The optical probe comprises 8 fluorescent optical fibers 26 which are symmetrically distributed on the outer side of the insulating cover 4 in a circular ring shape, and the 8 fluorescent optical fibers 26 are connected with a coupler 28 in the center of the circular ring through corresponding 8 couplers 27; a plurality of fluorescence optic fibre 26 symmetry rings distribute in organic glass board 31, organic glass board 31 fixed connection insulating boot 4, and insulating board 1 is the polyethylene insulating board, and insulating piece 16 is the phenolic plastic insulating piece.
The second coaxial cable connector 21 is connected to the first metal cover 20 through an insulating washer 22.
The insulation cover 4 is connected with the wall 5 of the switch cabinet through an insulation bolt, the first metal cover 20 is connected with the wall 5 of the switch cabinet through a metal bolt, and the second metal cover 24 is connected with the wall 5 of the switch cabinet through a metal bolt; the first coaxial cable connector 6 is connected with the first metal cover 20 through a metal bolt, the second coaxial cable connector 21 is connected with the first metal cover 20 through an insulating bolt, the third coaxial cable connector 23 is connected with the first metal cover 20 through a metal bolt, and the optical fiber connector 30 is connected with the first metal cover 20 through a metal bolt.
One end of the cable core of the first coaxial cable 11 is connected with the second metal patch 3, and the shielding layer of the first coaxial cable 11 is connected with the first metal patch 2.
The high-voltage switch cabinet is characterized in that the wall 5 of the high-voltage switch cabinet is grounded through a switch cabinet grounding wire resistor 9, a discharge source 10 is arranged in the high-voltage switch cabinet, an electromagnetic-ultrasonic composite sensor is connected with a signal acquisition device 15, one end of a first coaxial cable 11 is connected with a first coaxial cable connector 6 through a connector 8 with a coaxial cable, the connector 8 with the coaxial cable is in threaded connection with the first coaxial cable connector 6, one end of a second coaxial cable 12 is connected with a second coaxial cable connector 21 through the connector 8 with the coaxial cable, the connector 8 with the coaxial cable is in threaded connection with the second coaxial cable connector 21, one end of a third coaxial cable 19 is connected with a third coaxial cable connector 23 through the connector 8 with the coaxial cable, and the connector 8 with the coaxial cable is in threaded connection with the third coaxial cable connector 23.
The operating characteristics of the complementary dipole dual patch antenna are determined by the length l, width w, thickness h, gap distance b of the first metal patch 2 and the second metal patch 3, and the thickness k of the insulating plate 1. Because a gap is left between the first metal patch 2 and the second metal patch 3 for symmetrical arrangement, according to the dipole theory, the gap impedance (i.e. the ultrahigh frequency sensor impedance) is in direct proportion to the dipole admittance, and the performance of the complementary gap of the dipole can be predicted by knowing the performance of the dipole, so that the dipole is complementary with the structure of the gap.
The copper patch and the insulating plate 1 of the complementary dipole double-patch type antenna can be formed by arranging a conductive copper sheet on the surface of a dielectric substrate of a bottom lining grounding plate, wherein the bottom lining grounding plate is in metal conductive contact with the wall 5 of the high-voltage switch cabinet; the conductive copper sheet may be attached to the insulating plate 1 made of polyethylene or the like.
The working principle of the transient voltage-to-ground voltage probe is shown in fig. 4, an insulation sheet 16 arranged between an inner transient voltage-to-ground voltage metal patch 17 and the wall of a switch cabinet forms a capacitor Cc1, a capacitor Cc2 formed by the insulation sheet 16 is arranged between the two transient voltage-to-ground voltage metal patches 17, the capacitor Cc and a series capacitor form a capacitive voltage-dividing type electromagnetic wave coupling transient voltage-to-ground voltage probe, and an inductor 18 is connected in series between a shielding layer (grounding) of the second coaxial cable 12 and the wall of the switch cabinet to block high-frequency electromagnetic waves from entering the acquisition device from the grounding side.
The principle of the composition structure of the optical probe is shown in fig. 5, 8 fluorescent fibers 26 are symmetrically arranged on an organic glass plate 31 in a ring shape, and are connected by 8 fiber connectors 27 and then sent into an 8 × 1 coupler 28 by a single-mode fiber 32 to form an enhanced optical probe, and the enhanced optical probe is connected with a fiber connector 30 by the single-mode fiber 32.
Fig. 6 shows a method for installing the high-voltage switch cabinet wall integrated acoustic-optical-electromagnetic composite sensor, which mainly includes 9 steps, specifically as follows (replacement or removal may also be referred to):
step 6, alternately stacking and bonding two insulating sheets 16 and two transient voltage-to-earth metal patches 17, and firmly bonding one surface of one insulating sheet 16 with the outer wall of the high-voltage switch cabinet wall 5;
step 9, conducting welding is carried out on the grounding side of the inductor 18 and the first metal cover 20; then, after the second coaxial cable joint 21 is in threaded connection with the second joint 8 with the coaxial cable, the coaxial cable joint and the metal cover are reliably installed in an insulating manner by using 4 insulating bolts and insulating washers 22, and the electromagnetic wave signal output interface of the transient voltage-to-ground voltage probe is fixedly installed; after the first coaxial cable joint 6 is in threaded connection with the first joint 8 with the coaxial cable, the first coaxial cable joint 6 and the first metal cover 20 are reliably installed in a conducting manner by using 4 metal bolts, and the fixed installation of the ultrahigh frequency electromagnetic wave signal output interface of the complementary dipole double-patch type antenna is completed; the optical fiber connector 30 is in threaded connection with the first metal cover 20 to finish the fixed installation of an optical pulse signal output interface of the enhanced optical probe formed by the fluorescent optical fibers 26; after the third coaxial cable connector 23 is in threaded connection with the third coaxial cable-equipped connector 8, the third coaxial cable connector 23 and the first metal cover 20 are installed reliably in a conductive manner by using 4 metal bolts, and the ultrasonic signal output interface of the ultrasonic probe based on the PZT sensor 25 is fixedly installed; the first metal cover 20 is then securely attached to the outer wall of the high-voltage switchgear cabinet wall 5 by means of 4 metal screws.
Fig. 7 is an output time domain waveform diagram of the high-voltage switch cabinet wall integrated acousto-optic electro-magnetic composite sensor, and the measurement parameters after the complementary dipole double patch type antenna is processed are as follows: the first metal patch 2 and the second metal patch 3 are 5cm in length, 10cm in width, 5mm in thickness, 1cm in gap distance and 1cm in thickness of the insulating plate 1 (polyethylene); the measurement size parameters after the capacitive electromagnetic wave coupling transient voltage-to-ground voltage probe is processed are as follows: the two transient voltage-to-earth metal patches 17 are 5cm in length, 5cm in width and 2mm in thickness, and the two insulating sheets 16 are made of insulating wood (phenolic plastics) and are 5cm in length, 5cm in width and 2mm in thickness; inductance 18L ═ 1100 nh; the PZT sensor 25 was chosen for the following main parameters: the resonance frequency is 150kHz, and the peak sensitivity is 75dB in the frequency range of 30 kHz-200 kHz; the fluorescent optical fiber 26 is made of Rhodamine6G doped fluorescent optical fiber 26, the working frequency range is 500nm-1000nm, and the length of each fluorescent optical fiber 26 is 8 cm.
Claims (9)
1. The integrated acousto-optic electromagnetic composite sensor for the high-voltage cabinet wall is characterized by comprising a complementary dipole double-patch type antenna, a transient voltage-to-earth voltage probe, an ultrasonic probe and an optical probe, wherein the complementary dipole double-patch type antenna comprises an insulating cover (4), an insulating plate (1) and a metal patch component, the metal patch component comprises a first metal patch (2) and a second metal patch (3) which are the same, one surface of the insulating plate (1) is connected with the inner wall of a switch cabinet wall (5), the other surface of the insulating plate (1) is symmetrically connected with the first metal patch (2) and the second metal patch (3), the insulating plate (1), the first metal patch (2) and the second metal patch (3) are arranged in a first cavity formed by the insulating cover (4) and the inner wall of the switch cabinet wall (5), and a gap is formed between the first metal patch (2) and the second metal patch (3), the insulation board (1) is provided with a first through hole (13), the switch cabinet wall (5) is provided with a second through hole (14), the gap, the first through hole (13) and the second through hole (14) are coaxial, one end of a first coaxial cable (11) is respectively connected with a first metal patch (2) and a second metal patch (3) in a conduction mode, the other end of the first coaxial cable is sequentially connected with a first coaxial cable connector (6) in a conduction mode through the gap, the first through hole (13) and the second through hole (14), the transient voltage-to-ground probe comprises two insulation sheets (16) and two transient voltage-to-ground metal patches (17), the insulation sheets (16) and the transient voltage-to-ground metal patches (17) are alternately arranged and connected with each other, one of the insulation sheets (16) is connected with the switch cabinet wall (5), one end of a cable core of the second coaxial cable (12) is connected with the transient voltage-, the other end of the ultrasonic probe is in conductive connection with a second coaxial cable connector (21), a shielding layer of a second coaxial cable (12) is in conductive connection with a transient earth voltage metal patch (17) at the inner side and a working side of an inductor (18), the ultrasonic probe comprises a PZT sensor (25) connected with the outer wall of the switch cabinet wall (5), the PZT sensor (25) is positioned in a third cavity formed by the first metal cover (20) and the outer wall of the switch cabinet wall (5), the PZT sensor (25) is in conductive connection with a third coaxial cable connector (23), the transient earth voltage probe and the ultrasonic probe are positioned in a second cavity formed by the first metal cover (20) and the outer wall of the switch cabinet wall (5), the second through hole (14) is positioned within the coverage range of the first metal cover (20), and the first coaxial cable connector (6) and the third coaxial cable connector (23) are in conductive connection with the first metal cover (20), second coaxial cable connects first metal covering (20) of insulating connection of (21), first metal covering (20) of ground connection side conducting connection of inductance (18), optical probe distributes in a plurality of fluorescence optic fibre (26) in the insulating cover (4) outside including symmetrical ring, and a plurality of fluorescence optic fibre (26) are through a plurality of couplers (27) that correspond and are connected central coupler (28) of ring, and single mode fiber (32) pass third through-hole (29), clearance, first through-hole (13) and second through-hole (14) conducting connection and first metal covering (20) conducting connection's optical fiber joint (30) in proper order, optical fiber joint (30) and first metal covering (20) conducting connection.
2. The acousto-optic-electromagnetic composite sensor integrated with the high-voltage cabinet wall as claimed in claim 1, wherein the optical probe comprises 8 fluorescent fibers (26) distributed outside the insulating cover (4) in a symmetrical circular ring, and the 8 fluorescent fibers (26) are connected with a coupler (28) at the center of the circular ring through corresponding 8 couplers (27).
3. The acousto-optic electromagnetic composite sensor integrated with the high-voltage cabinet wall as claimed in claim 1, wherein the plurality of fluorescent optical fibers (26) are symmetrically distributed on the organic glass plate (31), the organic glass plate (31) is fixedly connected with the insulating cover (4), the insulating plate (1) is a polyethylene insulating plate, and the insulating sheet (16) is a phenolic plastic insulating sheet.
4. The acousto-optic-electromagnetic composite sensor integrated with the high-voltage cabinet wall as claimed in claim 1, characterized in that the second coaxial cable connector (21) is connected with the first metal cover (20) through an insulating gasket (22).
5. The acousto-optic-electromagnetic composite sensor integrated with the high-voltage cabinet wall as claimed in claim 1, wherein the insulating cover (4) is connected with the switch cabinet wall (5) through an insulating bolt, the first metal cover (20) is connected with the switch cabinet wall (5) through a metal bolt, and the second metal cover (24) is connected with the switch cabinet wall (5) through a metal bolt.
6. The acousto-optic-electromagnetic composite sensor integrated with the high-voltage cabinet wall as claimed in claim 1, wherein the first coaxial cable connector (6) is connected with the first metal cover (20) through a metal bolt, the second coaxial cable connector (21) is connected with the first metal cover (20) through an insulating bolt, the third coaxial cable connector (23) is connected with the first metal cover (20) through a metal bolt, and the optical fiber connector (30) is connected with the first metal cover (20) through a metal bolt.
7. The acousto-optic-electromagnetic composite sensor integrated with the high-voltage cabinet wall as claimed in claim 1, wherein one end of the cable core of the first coaxial cable (11) is connected with the second metal patch (3), and the shielding layer of the first coaxial cable (11) is connected with the first metal patch (2).
8. The acousto-optic-electromagnetic composite sensor integrated with the high-voltage cabinet wall as claimed in claim 1 is characterized in that the insulating plate (1) is bonded with the first metal patch (2) and the second metal patch (3) respectively, the insulating plate (16) is bonded with the transient voltage-to-earth voltage metal patch (17), one insulating plate (16) is bonded with the switch cabinet wall (5), and the insulating plate (1) is bonded with the switch cabinet wall (5).
9. The acousto-optic-electromagnetic composite sensor integrated with the wall of the high-voltage cabinet according to claim 1, wherein the first metal patch (2), the second metal patch (3) and the two transient voltage-to-ground voltage metal patches (17) are all copper patches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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