CN118246471A - Transformer radio frequency temperature measurement label assembly for long-distance communication under strong electromagnetic interference - Google Patents
Transformer radio frequency temperature measurement label assembly for long-distance communication under strong electromagnetic interference Download PDFInfo
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- CN118246471A CN118246471A CN202311814102.2A CN202311814102A CN118246471A CN 118246471 A CN118246471 A CN 118246471A CN 202311814102 A CN202311814102 A CN 202311814102A CN 118246471 A CN118246471 A CN 118246471A
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- radio frequency
- transformer
- temperature measurement
- electromagnetic interference
- under strong
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- 238000009529 body temperature measurement Methods 0.000 title claims abstract description 27
- 238000004891 communication Methods 0.000 title claims abstract description 25
- 239000000919 ceramic Substances 0.000 claims description 21
- 239000002184 metal Substances 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 11
- 239000000853 adhesive Substances 0.000 claims description 5
- 230000001070 adhesive effect Effects 0.000 claims description 5
- 238000007747 plating Methods 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims 1
- 230000004927 fusion Effects 0.000 claims 1
- 239000012299 nitrogen atmosphere Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 5
- 230000005684 electric field Effects 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical group [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000003071 parasitic effect Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- SWPMTVXRLXPNDP-UHFFFAOYSA-N 4-hydroxy-2,6,6-trimethylcyclohexene-1-carbaldehyde Chemical compound CC1=C(C=O)C(C)(C)CC(O)C1 SWPMTVXRLXPNDP-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000004806 packaging method and process Methods 0.000 description 1
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- 239000000758 substrate Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07745—Mounting details of integrated circuit chips
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/0772—Physical layout of the record carrier
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a transformer radio frequency temperature measurement tag assembly for remote communication under strong electromagnetic interference, which comprises a radio frequency tag and a clamp, wherein the radio frequency tag comprises an antenna and an RFID chip, the RFID chip is packaged in a shell, a wiring seam is arranged at the bottom of the shell, and the RFID chip is connected with the antenna arranged at the bottom of the shell through the wiring seam; the fixture comprises a connecting structure and clamping structures connected to two sides of the connecting structure, wherein a clamping groove for clamping a radio frequency tag is formed in the connecting structure, and the radio frequency tag is clamped at a temperature measuring point of the transformer through the fixture. The method and the device can be applied to the application scene of the transformer substation in the complex electromagnetic environment.
Description
Technical Field
The invention relates to a transformer radio frequency temperature measurement tag assembly for remote communication under strong electromagnetic interference in the field of transformer substation temperature monitoring.
Background
Along with the rapid development of the RFID technology, the RFID is gradually used for monitoring instead of manpower in many fields requiring real-time temperature measurement and monitoring. Particularly in the field of cold chain logistics, when goods with labels are fed into an induction area in a cold chain logistics warehouse with RFID readers, the readers can simultaneously identify a plurality of labels in a long distance, and the information in the identified labels is uploaded to a warehouse management system through a network. The warehouse management system checks information such as the quantity and the type of the goods with a warehouse entry plan to check whether errors exist or not, meanwhile, the system also analyzes temperature information recorded in the label to judge whether the logistics process of the goods is safe or not, and after the goods are detected to be qualified, the information such as the receiving time and the quantity of the qualified goods is automatically input into the system database. The storage system arranges the position of the goods shelf according to the bin position information, calculates the goods storage and moving distance, and tracks the goods to ensure that the goods are put in the correct position. After goods are put on the shelf, the temperature label records the measured temperature periodically according to preset settings, and transmits the temperature data to a reader in a warehouse, and the temperature data are collected and transmitted to a system database in a unified way, so that the analysis is managed in a centralized way. When the product is delivered, the RFID reader reads the label on the product package, the warehousing system is compared with the export plan, and the delivery time and the quantity are recorded. The tag and the temperature measuring terminal have certain wireless temperature measuring capability, but the surface is not subjected to any measure, so that the tag and the temperature measuring terminal are only suitable for a cold storage warehouse with clean electromagnetic environment and no shielding, the communication distance is generally shorter, and the conventional RFID temperature measuring device can not meet the requirement under the conditions of strong electromagnetic interference environment and certain requirements on the communication distance. Therefore, the sensor and the temperature measuring terminal are required to be redesigned, and the communication distance and the anti-interference capability are improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a transformer radio frequency temperature measurement tag assembly for remote communication under strong electromagnetic interference, which can be applied to transformer substation application scenes in complex electromagnetic environments.
The technical scheme for achieving the purpose is as follows: the transformer radio frequency temperature measurement tag assembly for remote communication under strong electromagnetic interference comprises a radio frequency tag and a clamp, wherein the radio frequency tag comprises an antenna and an RFID chip, the RFID chip is packaged in a shell, a wiring seam is arranged at the bottom of the shell, and the RFID chip is connected with the antenna arranged at the bottom of the shell through the wiring seam; the fixture comprises a connecting structure and clamping structures connected to two sides of the connecting structure, wherein a clamping groove for clamping a radio frequency tag is formed in the connecting structure, and the radio frequency tag is clamped at a temperature measuring point of the transformer through the fixture.
Further, the shell is a ceramic shell, and the antenna is a ceramic antenna.
Further, a metal cover plate is fixed on the top of the ceramic shell through a welding ring to form a closed cavity.
Further, nitrogen is filled in the ceramic shell, so that the RFID is located in the nitrogen environment.
Further, metal plating layers are plated on the front, rear, left and right side walls of the ceramic shell.
Further, the temperature measuring points of the transformer, namely the clamping positions of the clamp are the high-voltage bushing of the transformer, the tapping switch of the transformer and the oil tank of the radiator of the transformer.
Further, the gripping structure includes a first grapple and a second grapple that are movable respectively.
Further, the clamping direction of the clamping structure is opposite to the direction of the clamping groove.
Further, a plurality of limit buckles for limiting the radio frequency tag are arranged on the groove arms at the two sides of the clamping groove.
Further, the RFID chip is connected with the antenna through ACA metal conductive adhesive.
The transformer radio frequency temperature measurement tag assembly for remote communication under strong electromagnetic interference has the following advantages:
1. the electromagnetic interference resistance of the RFID is improved: through designing and optimizing the RFID tag and the sensor, the anti-electromagnetic interference capability of the tag can be greatly improved, and the tag can work normally in a strong electromagnetic interference environment.
2. And (3) improving the measurement accuracy of the label: and determining the mounting positions of the labels according to the heating mechanism of the equipment and the characteristics of the RFID labels, ensuring accurate measurement and reducing the number of the labels.
Drawings
FIG. 1 is a schematic diagram of a RF tag of a transformer RF temperature measurement tag assembly for remote communication under strong electromagnetic interference according to the present invention;
FIG. 2 is a schematic structural diagram of a fixture for a transformer RF temperature measurement tag assembly for remote communication under strong electromagnetic interference in accordance with the present invention;
Fig. 3 is a top view of a fixture for a transformer radio frequency temperature measurement tag assembly for long-range communication under strong electromagnetic interference in accordance with the present invention.
Detailed Description
In order to better understand the technical solution of the present invention, the following detailed description is given by way of specific examples:
The working energy of the RFID temperature chip is mainly obtained in an electromagnetic coupling mode of a resonant circuit, the forward link is used for converting received radio frequency energy into direct current energy through a charge accumulation circuit and providing energy for self work, and the reverse link is used for demodulating signals carried in a radio frequency carrier wave, decoding the signals and making corresponding response in a form of reflecting electromagnetic waves according to a protocol. The temperature chip electromagnetic transmission mainly analyzes forward transmission and reverse transmission characteristics; the electromagnetic characteristic analysis of the scene mainly analyzes electromagnetic spatial distribution characteristics, electromagnetic generation mechanism and radiation characteristics in the scene. And then, comprehensively utilizing electromagnetic coupling, free space energy transmission and back electromagnetic scattering theory to establish an electromagnetic state model of the space scene, analyzing a space electromagnetic coupling transmission mechanism, and finally obtaining electromagnetic disturbed modes and characteristics in the working scene of the temperature chip.
The tag chip wire bonding is mainly used for hard substrate antenna tags, such as PCB and ceramic-based ultrahigh frequency tags. The tag chip is relatively distributed with two input ends, one end of the lead wire is bonded to the input end of the chip, the other end is bonded to the feed end of the antenna, and the two lead wires are approximately in a plane. A single bonding wire with the diameter of 1mi generates parasitic inductance of about 0.3n H in the 1GHz frequency band, the parasitic resistance is almost zero and can be ignored, and the influence of the length of the bonding wire is small. In the 900MHz band where the UHF tag operates, the calculated impedance is about 1Ω, with little effect relative to the matching impedance of about 200Ω. Therefore, the wire bonding has little effect on the impedance matching of the tag chip and the antenna, and the tag performance is hardly affected. The ACA conductive adhesive is a mixed jelly of conductive metal particles and polymers, and is solidified under the action of pressure and heat, so that the connection between the antenna and the chip is realized. The ACA conductive adhesive is bonded as shown in figure 1, the electrical connection is achieved by physical contact between the metal particles and the antenna feed point and the chip bump, and metallurgical bonding is not formed between the conductive particles, between the conductive particles and the antenna feed point and between the conductive particles and the chip bump, and the periphery of the conductive path is filled with polymer dielectric. Thus, the junction forms a capacitance model, such that parasitic capacitance exists. The influence of strong electromagnetic interference on tag communication can be greatly reduced by forming the tag into a sealed structure.
The invention relates to a transformer radio frequency temperature measurement tag assembly for remote communication under strong electromagnetic interference, which comprises a radio frequency tag and a clamp, wherein the radio frequency tag comprises an antenna and an RFID chip.
Referring to fig. 1, an rfid core 1 is encapsulated in a ceramic housing 2, and a wire joint 21 is formed at the bottom thereof. The top of the ceramic shell 2 is fixed with a metal cover plate 4 through a welding ring 3 to form a closed cavity. The interior of the ceramic shell is filled with nitrogen so that the RFID is in a nitrogen environment. The front, back, left and right side walls of the ceramic shell are plated with metal plating layers. The bottom of the RFID chip is connected with the ceramic antenna 5 through ACA metal conductive adhesive.
The chip packaging overall frame is formed by an HTCC ceramic shell and a metal cover plate into a closed cavity. The RFID chip is placed in the nitrogen environment of the closed cavity, the PAD salient points of the chip are communicated with the external ceramic antenna through ACA metal conductive rubber gold balls and metal through holes of the ceramic shell, and the metal cover plate and the metal layer of the ceramic inner wall form a metal shielding metal cavity which plays a role in blocking an electric field and a magnetic field, so that the intensity of an electromagnetic field generated by the external environment in the vertical direction relative to the radio frequency identification chip is cut off. And simultaneously, electromagnetic signals excited by the radio frequency identification chip can be received and transmitted through the ceramic antenna. The structure ensures normal operation of the high-temperature environment and has the advantage of strong electromagnetic interference resistance. The high-voltage electric field simulation is carried out on the tag through comsol simulation software, the surface electric field of the tag without any protection measures reaches 6.3910 10 5 V/m, the surface electric field of the tag adopting the electromagnetic interference resisting structure is only 2.5X10 4 V/m, and the electric field of the tag is only 3% of that of the tag, so that the tag with the structure can work normally on a temperature measuring point of a transformer.
Referring to fig. 2 and 3, the fixture includes a connection structure 6 and clamping structures connected to two sides of the connection structure, wherein a clamping groove for clamping a radio frequency tag is arranged on the connection structure, and the radio frequency tag is clamped at a temperature measuring point of the transformer through the fixture. During operation of the transformer, losses occur in the core, windings and structural members, which dissipate heat into the surrounding medium, causing the transformer to heat up and the temperature to rise. The heat of the transformer is transferred to the cooling medium in a thermally conductive, convective and radiative manner. In the oil immersed transformer, the transformer insulating oil is used as a cooling medium in the tank body, and heat transfer is performed through self circulation flow, so that the temperature rise of each part of the transformer is reduced. The heat in the winding is transferred to the surface of the winding in a heat conduction mode; heat on the surface of the winding is transferred to the transformer oil in a convection mode; the heat in the transformer oil is also transferred to the oil tank wall or the heat dissipation cooling device in a convection mode; finally, heat is dissipated by convection or heat radiation from the tank wall or the radiator cooling device to the surrounding air. Analysis shows that the heat points of the transformer surface box body are mainly concentrated in the middle position of the box body. The high-voltage bushing of the power transformer is an outlet device outside the S-shaped oil tank of the high-voltage winding lead wire and the low-voltage winding lead wire inside the transformer, and the heating point of the bushing is mainly concentrated at the position of the equipment wire clamp and the bushing wiring terminal and the position of the bushing wiring terminal and the army cap through analysis. Through the analysis, the temperature measuring point of the transformer is determined, namely the clamping position of the clamp is the position of the high-voltage bushing of the transformer, the tapping switch of the transformer and the oil tank of the radiator of the transformer.
The gripping structure comprises a first grapple 71 and a second grapple 72, which are movable respectively. The two-section clamping structure enables the clamp to be fixed at any position of the transformer. The clamping direction of the clamping structure is opposite to the direction of the clamping groove. And a plurality of limit buckles 8 for limiting the radio frequency tag are arranged on the groove arms at the two sides of the clamping groove. The clamp needs to simultaneously consider the characteristics of heat conductivity, firmness and electromagnetic field, and the clamp can ensure that the label is reliably installed while the temperature measurement performance of the label is not influenced.
The working flow of the RFID temperature measurement technology provided by the invention comprises the following steps:
After the tag is arranged at the point to be measured of the transformer, the transformer transmits radio frequency signals of two frequency bands, when the tag antenna receives the signals, induced current is generated, and the tag chip is activated to transmit information such as self codes to the tag antenna, so that the tag antenna transmits the information. The system receives the carrier signal transmitted from the tag antenna and transmits it to the reader through the antenna adjuster. The reader decodes the received signal, and the decoded information can be sent to the terminal data processing center through the network port. The main system of the data processing center judges the legitimacy of the card according to the logic operation. The card can be processed accordingly according to different settings. For example, if the card is legal, the control mechanism action can be instructed to implement the relevant operation. Through experimental tests, the error of the temperature measurement mode of the RFID is only 1.6%, and the temperature measurement accuracy requirement of equipment is completely met.
It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration only and not for limitation of the invention, and that variations and modifications of the above described embodiments are intended to fall within the scope of the claims of the invention as long as they fall within the true spirit of the invention.
Claims (10)
1. The utility model provides a transformer radio frequency temperature measurement label subassembly of long-range communication under strong electromagnetic interference, includes radio frequency label and anchor clamps, its characterized in that: the radio frequency tag comprises an antenna and an RFID chip, the RFID chip is packaged in the shell, a wiring seam is arranged at the bottom of the shell, and the RFID chip is connected with the antenna arranged at the bottom of the shell through the wiring seam; the fixture comprises a connecting structure and clamping structures connected to two sides of the connecting structure, wherein a clamping groove for clamping a radio frequency tag is formed in the connecting structure, and the radio frequency tag is clamped at a temperature measuring point of the transformer through the fixture.
2. The transformer radio frequency temperature measurement tag assembly for remote communication under strong electromagnetic interference as set forth in claim 1, wherein the housing is a ceramic shell and the antenna is a ceramic antenna.
3. The transformer radio frequency temperature measurement tag assembly for remote communication under strong electromagnetic interference as set forth in claim 2, wherein the top of the ceramic housing is fixed with a metal cover plate through a fusion ring to form a closed cavity.
4. A transformer radio frequency temperature measurement tag assembly for remote communication under strong electromagnetic interference as set forth in claim 3 wherein the interior of the ceramic housing is filled with nitrogen gas to allow the RFID to be in a nitrogen atmosphere.
5. The radio frequency temperature measurement tag assembly for a transformer for remote communication under strong electromagnetic interference as set forth in claim 2, wherein the four side walls of the ceramic housing are plated with metal plating layers.
6. The radio frequency temperature measurement tag assembly for a transformer for remote communication under strong electromagnetic interference according to claim 1, wherein the temperature measurement points of the transformer, namely the clamping positions of the clamp are the high voltage bushing of the transformer, the tapping switch of the transformer and the oil tank of the radiator of the transformer.
7. The remote communication transformer radio frequency temperature measurement tag assembly according to claim 1, wherein the clamping structure comprises a first grapple and a second grapple that are movable respectively.
8. The remote communication transformer radio frequency temperature measurement tag assembly according to claim 7, wherein the clamping direction of the clamping structure is opposite to the clamping direction of the clamping groove.
9. The transformer radio frequency temperature measurement tag assembly for remote communication under strong electromagnetic interference according to claim 8, wherein a plurality of limit buckles for limiting the radio frequency tag are arranged on the two side slot arms of the clamping slot.
10. The transformer radio frequency temperature measurement tag assembly for remote communication under strong electromagnetic interference as set forth in claim 1, wherein the RFID chip is connected to the antenna by ACA metal conductive adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311814102.2A CN118246471A (en) | 2023-12-27 | 2023-12-27 | Transformer radio frequency temperature measurement label assembly for long-distance communication under strong electromagnetic interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311814102.2A CN118246471A (en) | 2023-12-27 | 2023-12-27 | Transformer radio frequency temperature measurement label assembly for long-distance communication under strong electromagnetic interference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118246471A true CN118246471A (en) | 2024-06-25 |
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ID=91550022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311814102.2A Pending CN118246471A (en) | 2023-12-27 | 2023-12-27 | Transformer radio frequency temperature measurement label assembly for long-distance communication under strong electromagnetic interference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118246471A (en) |
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2023
- 2023-12-27 CN CN202311814102.2A patent/CN118246471A/en active Pending
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