CN112362188A - Enhanced RFID passive temperature measurement label for power cable connector and temperature measurement method - Google Patents

Enhanced RFID passive temperature measurement label for power cable connector and temperature measurement method Download PDF

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Publication number
CN112362188A
CN112362188A CN202011256503.7A CN202011256503A CN112362188A CN 112362188 A CN112362188 A CN 112362188A CN 202011256503 A CN202011256503 A CN 202011256503A CN 112362188 A CN112362188 A CN 112362188A
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China
Prior art keywords
radio frequency
energy
interface
power cable
controller
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Pending
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CN202011256503.7A
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Chinese (zh)
Inventor
肖振锋
刘志刚
伍也凡
毛文奇
陈剑
陈仲伟
文明
李沛哲
王逸超
刘浩田
冷阳
李达伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
State Grid Hunan Electric Power Co Ltd
Economic and Technological Research Institute of State Grid Hunan Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Hunan Electric Power Co Ltd
Economic and Technological Research Institute of State Grid Hunan Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by State Grid Corp of China SGCC, State Grid Hunan Electric Power Co Ltd, Economic and Technological Research Institute of State Grid Hunan Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN202011256503.7A priority Critical patent/CN112362188A/en
Publication of CN112362188A publication Critical patent/CN112362188A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01KMEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00Thermometers specially adapted for specific purposes
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06Record 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
    • G06K19/067Record 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
    • G06K19/07Record 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
    • G06K19/077Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07749Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card

Abstract

The invention discloses an enhanced RFID passive temperature measurement tag for a power cable joint and a temperature measurement method, wherein the measurement tag comprises a radio frequency antenna, a radio frequency interface, a controller, a temperature sensor, a memory and an energy acquisition unit; the radio frequency antenna is connected with the radio frequency interface, and the radio frequency interface, the temperature sensor, the memory and the energy acquisition unit are all connected with the controller; the radio frequency antenna receives a radio frequency signal from the tag reader and sends the radio frequency signal to the radio frequency interface; the radio frequency interface demodulates the radio frequency signal and sends the radio frequency signal to the controller; the controller activates the energy acquisition unit after receiving the radio frequency signal; the energy acquisition unit acquires electric energy from the power cable and provides a working power supply for the enhanced RFID passive temperature measurement tag; the temperature sensor collects the temperature of the power cable interface and sends the temperature data to the controller, and the temperature data is modulated into a radio frequency signal by the radio frequency interface and sent to the tag reader through the radio frequency antenna. The invention has strong anti-interference capability and long transmission distance.

Description

Enhanced RFID passive temperature measurement label for power cable connector and temperature measurement method
Technical Field
The invention relates to the technical field of temperature monitoring, in particular to an enhanced RFID passive temperature measurement tag for a power cable connector and a temperature measurement method.
Background
In an electric power system, in order to ensure safe and stable operation of electric power equipment, temperature parameters of a power cable joint and the like need to be monitored. The existing method for measuring the temperature of the power cable mainly comprises the following steps: temperature sensing cable type temperature measurement, thermistor type temperature measurement, infrared sensing type temperature measurement, thermocouple type temperature measurement, optical fiber distributed temperature measurement and the like have numerous technical defects and economic defects in the aspects of safety, reliability, stability, economy, practicability and the like, and the temperature monitoring system is prevented from being applied to a power system on a large scale.
The Radio Frequency Identification (RFID) technology is a non-contact automatic identification technology, which automatically identifies a target object and obtains related data through a radio frequency signal, does not need manual intervention in identification work, and can work in various severe environments. The RFID technology can identify objects moving at high speed and can identify a plurality of labels simultaneously, and the operation is quick and convenient. In general, the frequency transmitted by the RFID reader is referred to as the operating frequency or carrier frequency of the RFID system. For the designed RFID reader-writer which works at the high frequency of 13.56MHz, the tag adopts a passive tag of which the energy is derived from the electromagnetic field of the reader-writer. The basic working principle is that the tag obtains energy from the radiation near field of the reader-writer coupling coil by adopting an electromagnetic coupling mode, so that the aim of exchanging data with the reader-writer is fulfilled.
The application of RFID in various industries has raised a wave, such as familiar logistics, ETC charging, electronic payment, and also in the fields of civil aviation, medical treatment, agricultural environmental monitoring, military, industrial manufacturing, electric power, security, and the like. In the power industry, the RFID is used for automatic meter reading application in a smart grid, automatic detection of working states of instruments and equipment of a power transmission substation, and inspection of a handheld reader-writer of an electric power worker. Abnormal conditions and equipment faults can be found in time, major safety accidents are avoided by timely processing, the working efficiency is improved, and the management cost is reduced.
The passive surface-mounted RFID temperature sensing technology is characterized in that an ultra-low power consumption temperature sensor is combined with an ultrahigh frequency radio frequency identification chip, and temperature and information reading and writing are realized through data exchange between a reader and a temperature tag by utilizing energy box information of space coupling electromagnetic waves. The energy of the temperature tag comes from a special antenna, and the defects of weak anti-interference capability and short transmission distance exist.
Disclosure of Invention
The invention provides an enhanced RFID passive temperature measurement tag for a power cable joint and a temperature measurement method, and aims to solve the problems of weak anti-interference capability and short transmission distance of the conventional RFID passive temperature measurement tag caused by energy collection.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
an enhanced RFID passive temperature sensing tag for a power cable joint, comprising: the device comprises a radio frequency antenna, a radio frequency interface, a controller, a temperature sensor, a memory and an energy acquisition unit; the radio frequency antenna is connected with a radio frequency interface, and the radio frequency interface, the temperature sensor, the memory and the energy acquisition unit are all connected with the controller;
the radio frequency antenna is used for sending the received radio frequency signal to the radio frequency interface;
the radio frequency interface is used for demodulating a radio frequency signal and sending the radio frequency signal to the controller;
the controller is used for activating the energy acquisition unit after receiving the radio frequency signal;
the energy acquisition unit is used for acquiring electric energy from the cable after being activated and providing a working power supply for the enhanced RFID passive temperature measurement tag;
the temperature sensor is provided with a working power supply by the energy acquisition unit, is used for acquiring the temperature of the power cable interface and sending the temperature to the controller;
the controller is also used for storing the temperature data of the power cable interface in the memory and sending the temperature data to the radio frequency interface;
the radio frequency interface is also used for modulating the temperature data of the power cable interface into radio frequency signals and sending the radio frequency signals to the tag reader through the radio frequency antenna.
In a more preferred technical scheme, the energy collecting unit collects electric energy from the power cable by adopting an electromagnetic induction principle.
In a more preferred technical scheme, the energy acquisition unit comprises an energy acquisition element, a rectifier, a voltage regulator, a lithium capacitor, a voltage stabilizer and an energy value judgment circuit; the energy taking element is used for picking up induced voltage from the power cable by adopting an electromagnetic induction principle; the rectifier is used for rectifying the picked-up induction voltage and storing electric energy in the lithium capacitor; the energy value judging circuit is used for acquiring and judging voltage values at two ends of the lithium capacitor; when the voltage at the two ends of the lithium capacitor exceeds a preset voltage value, the boost converter is activated by the controller and then performs boost conversion on the voltage at the two ends of the lithium capacitor; the voltage stabilizer is used for stabilizing the output voltage obtained by the boost conversion to the direct-current voltage required by the load so as to provide a working power supply for the enhanced RFID passive temperature measurement tag.
In a more preferable technical scheme, the memory comprises a read-only memory and a read-write memory, the read-only memory is used for storing tag information, the read-write memory is used for recording temperature data acquired by the temperature sensor, and the temperature data is data with a timestamp.
In a more preferable technical scheme, the carrier frequency of the radio frequency antenna and the radio frequency interface is 2.4 GHz.
The method for measuring the temperature of the power cable connector by adopting the enhanced RFID passive temperature measurement tag comprises the following steps:
the radio frequency antenna acquires and receives radio frequency signals from the tag reader and sends the radio frequency signals to the radio frequency interface;
the radio frequency interface demodulates the radio frequency signal and sends the radio frequency signal to the controller;
the controller activates the energy acquisition unit after receiving the radio frequency signal;
after the energy acquisition unit is activated by the controller, electric energy is acquired from the power cable, and a working power supply is provided for the enhanced RFID passive temperature measurement tag;
the temperature sensor collects the temperature of the power cable interface and sends temperature data to the controller under the condition that the energy collection unit provides a working power supply;
the controller stores the temperature data of the power cable interface in the memory and reads the temperature data from the memory to send to the radio frequency interface;
the radio frequency interface modulates the temperature data of the power cable interface into a radio frequency signal and sends the radio frequency signal to the tag reader through the radio frequency antenna.
In a more preferred technical scheme, the energy collecting unit collects electric energy from the power cable by adopting an electromagnetic induction principle.
In a more preferred technical scheme, the energy acquisition unit comprises an energy acquisition element, a rectifier, a voltage regulator, a lithium capacitor, a voltage stabilizer and an energy value judgment circuit; the specific method for acquiring electric energy and providing a working power supply for the enhanced RFID passive temperature measurement tag by the energy acquisition unit comprises the following steps:
the energy taking element picks up an induced voltage from the power cable by adopting an electromagnetic induction principle;
the rectifier rectifies the induction voltage picked up by the energy-taking element and stores the electric energy in the lithium capacitor;
the energy value judging circuit collects and judges voltage values at two ends of the lithium capacitor;
when the voltage at the two ends of the lithium capacitor exceeds a preset voltage value, the boost converter is activated by the controller and then performs boost conversion on the voltage at the two ends of the lithium capacitor;
the voltage stabilizer stabilizes the output voltage obtained by the boost conversion to the direct current voltage required by the load so as to provide a working power supply for the enhanced RFID passive temperature measurement tag.
In a more preferable technical scheme, the memory comprises a read-only memory and a readable and writable memory, the read-only memory stores label information, the readable and writable memory is used for recording temperature data acquired by the temperature sensor, and the temperature data is data with a timestamp; when the controller reads the temperature data from the read-write memory, the controller also reads the label information from the read-only memory, and the temperature data and the label information are integrated and then sent to the radio frequency interface for modulation.
In a more preferable technical scheme, the carrier frequency of the radio frequency antenna and the radio frequency interface is 2.4 GHz.
Advantageous effects
According to the invention, an ultra-low power consumption temperature sensor is combined with a 2.4G high-radio frequency identification chip, the energy of power cable space coupling electromagnetic waves is used as a working power supply, and the acquisition and reading of power cable temperature data are realized through data exchange between a reader and a label. Therefore, the invention has the following technical effects: (1) the temperature measurement tag adopts a passive technology, and has no later maintenance cost; (2) the energy source of the temperature measurement tag is a power cable, and a special antenna is not needed for wireless electromagnetic energy transmission, so that the anti-interference capability of the RFID temperature measurement tag is effectively enhanced, and the transmission distance is increased; (3) the RFID has the advantages of long identification distance, high identification speed and the like.
Drawings
FIG. 1 is a schematic diagram of an enhanced RFID passive thermometric tag coupled to an RFID reader according to an embodiment of the present invention;
FIG. 2 is a block diagram of an enhanced RFID passive temperature measurement tag according to an embodiment of the present invention;
fig. 3 is an equivalent circuit diagram of the energy harvesting unit according to the embodiment of the present invention.
Detailed Description
The embodiment is developed based on the technical scheme of the present invention, and a detailed implementation manner and a specific operation process are given, so as to further explain the technical scheme of the present invention.
The embodiment provides an enhanced RFID passive temperature measurement tag for a power cable connector and a temperature measurement method using the same, as shown in fig. 2, the temperature measurement tag includes: the system comprises a radio frequency antenna, a radio frequency interface, a controller (adopting an RFID chip), a temperature sensor, a memory and an energy acquisition unit; the radio frequency antenna is connected with a radio frequency interface, and the radio frequency interface, the temperature sensor, the memory and the energy acquisition unit are all connected with the controller. The energy acquisition unit comprises an energy acquisition element, a rectifier, a voltage regulator, a lithium capacitor, a voltage regulator and an energy value judgment circuit, and the carrier frequency of the radio frequency antenna and the radio frequency interface is 2.4 GH.
When the tag reader approaches the enhanced RFID passive temperature measurement tag of this embodiment, as shown in fig. 1, the radio frequency antenna acquires a received radio frequency signal from the tag reader and sends the received radio frequency signal to the radio frequency interface; the radio frequency interface demodulates the radio frequency signal and sends the radio frequency signal to the controller; the controller activates the energy acquisition unit after receiving the radio frequency signal; after the energy acquisition unit is activated by the controller, the energy acquisition element picks up the induction voltage from the power cable by adopting an electromagnetic induction principle; the rectifier rectifies the induction voltage picked up by the energy-taking element and stores the electric energy in the lithium capacitor; the energy value judging circuit collects and judges voltage values at two ends of the lithium capacitor; when the voltage at the two ends of the lithium capacitor exceeds a preset voltage value, the boost converter is activated by the controller and then performs boost conversion on the voltage at the two ends of the lithium capacitor; the voltage stabilizer stabilizes the output voltage obtained by the boost conversion to the direct-current voltage required by the load so as to provide a working power supply for the enhanced RFID passive temperature measurement tag; the temperature sensor collects the temperature of the power cable interface and sends temperature data to the controller under the condition that the energy collection unit provides a working power supply; the controller stores the temperature data of the power cable interface in the memory and reads the temperature data from the memory to send to the radio frequency interface; the radio frequency interface modulates the temperature data of the power cable interface into a radio frequency signal and sends the radio frequency signal to the tag reader through the radio frequency antenna.
When the voltage at the two ends of the lithium capacitor exceeds a preset voltage value, the controller sends a switching-on signal to activate the boost converter, so that the boost converter performs boost conversion on the voltage at the two ends of the lithium capacitor to further stably provide a working power supply for the label; when the voltage at two ends of the lithium capacitor is reduced to a set threshold value, the controller sends a judgment signal to stop the boost converter, the energy acquisition unit cuts off a channel for supplying power to the tag, but the energy acquisition element still continues to pick up electric energy from the cable and store the electric energy in the lithium capacitor, and the cycle is repeated.
The memory comprises a read-only memory and a read-write memory, the read-only memory is used for storing label information, the read-write memory is used for recording temperature data collected by the temperature sensor, and the temperature data is data with a time stamp. When the controller reads the temperature data from the memory, the tag information is also read from the read-only memory, the temperature data and the tag information are integrated and then are sent to the radio frequency interface, and the radio frequency interface modulates the temperature data with the tag information into a radio frequency signal and then sends the radio frequency signal to the tag reader through the radio frequency antenna.
Besides the energy acquisition unit provides a working power supply for the enhanced RFID passive temperature measurement tag, the enhanced RFID passive temperature measurement tag is activated by required electric energy, and the radio frequency antenna acquires induced voltage from an electromagnetic field of a tag reader. When the enhanced RFID passive temperature measurement tag enters the electromagnetic field range of a tag reader, induced voltage can be generated on the radio frequency antenna, and the controller is used for activating the energy acquisition unit to pick up electric energy from the cable and activating the boost converter to perform boost conversion. The principle of the induced voltage generated by the radio frequency antenna is as follows:
the radio frequency antenna is a loop antenna and is a square conductor loop with the side length of a. Assuming that the magnetic induction at the vertical distance X from the center of the rf antenna is B, the magnitude of B can be calculated by the following formula:
in the formula, mu0Is the dielectric constant of free space; n is the number of turns of the loop antenna, and I is the current in the loop antenna.
When x is2>>a2In time, the above equation can be simplified as:
it follows that the magnetic induction at a point is related to the distance x of the point from the center of the loop antenna, and that B is inversely proportional to x3. B decreases very rapidly with increasing x, which is the main reason why the read-write distance of RFID systems is limited.
According to the law of electromagnetic induction, the induced voltage on the tag antenna is
Where N is the number of turns of the tag antenna coil and φ is the magnetic flux through the tag antenna.
Assuming that the area of the tag antenna is S, and alpha is the included angle between the magnetic induction B generated by the reader antenna and the tag antenna. Obviously, when the reader antenna is parallel to the tag antenna, the magnetic flux passes through the tag antenna entirely, thereby obtaining the maximum induced voltage generated on the tag antenna:
v is an induced voltage on the tag antenna, N1 is the number of turns of the coil of the reader antenna, N2 is the number of turns of the coil of the tag antenna, a is the side length of the reader loop antenna, b is the side length of the tag antenna, x is the distance between the reader antenna and the tag antenna, and i is an instantaneous current flowing through the reader antenna.
The induced current voltage V generated by the magnetic field of the reader on the tag antenna can be deduced according to the formulaDC
VDC=2πfNSQB sinα
In the formula, N is the number of turns of the tag coil, S is the area of the tag antenna, and Q is the quality factor of the tag coil.
Fig. 3 is an equivalent circuit diagram of the energy harvesting unit. Wherein the power cable current I can be seen as flowing through a single turn conductor with a turn ratio to the energy extracting element of 1: n, the mutual inductance is M. The coil self-inductance of the energy-taking element is LS, the coil internal resistance is RS, the induction voltage is US, and the equivalent output load is RO. The power cable current I is a sinusoidal alternating current, the operating frequency f is 50Hz, and then according to the faraday's law of electromagnetic induction, the energy-taking element picks up the induced voltage from the power cable by the electromagnetic induction principle as follows:
US=jωMI;
where ω ═ 2 π f is the angular frequency of the cable current, M is the mutual inductance between the energy harvesting device and the power cable, and I is the current of the power cable.
The conventional RFID passive temperature measurement tag supplies energy through space coupling electromagnetic waves emitted by a radio frequency antenna, and the stability of the conventional RFID passive temperature measurement tag is generally reduced due to the distance between the radio frequency antenna and the temperature measurement tag. According to the enhanced RFID passive temperature measurement tag provided by the invention, the radio frequency antenna only needs to provide part of energy for activating the tag to work, and the working energy is provided by the energy acquisition unit in the temperature measurement tag through acquiring electromagnetic energy of the power cable, so that the stability and the transmission distance of RFID temperature measurement are effectively improved.
The above embodiments are preferred embodiments of the present application, and those skilled in the art can make various changes or modifications without departing from the general concept of the present application, and such changes or modifications should fall within the scope of the claims of the present application.

Claims (10)

1. An enhanced RFID passive temperature measurement tag for a power cable joint, comprising: the device comprises a radio frequency antenna, a radio frequency interface, a controller, a temperature sensor, a memory and an energy acquisition unit; the radio frequency antenna is connected with a radio frequency interface, and the radio frequency interface, the temperature sensor, the memory and the energy acquisition unit are all connected with the controller;
the radio frequency antenna is used for sending the received radio frequency signal to the radio frequency interface;
the radio frequency interface is used for demodulating a radio frequency signal and sending the radio frequency signal to the controller;
the controller is used for activating the energy acquisition unit after receiving the radio frequency signal;
the energy acquisition unit is used for acquiring electric energy from the cable after being activated and providing a working power supply for the enhanced RFID passive temperature measurement tag;
the temperature sensor is provided with a working power supply by the energy acquisition unit, is used for acquiring the temperature of the power cable interface and sending the temperature to the controller;
the controller is also used for storing the temperature data of the power cable interface in the memory and sending the temperature data to the radio frequency interface;
the radio frequency interface is also used for modulating the temperature data of the power cable interface into radio frequency signals and sending the radio frequency signals to the tag reader through the radio frequency antenna.
2. The enhanced RFID passive temperature measurement tag for power cable joints according to claim 1, wherein the energy harvesting unit harvests electrical energy from a power cable using the principle of electromagnetic induction.
3. The enhanced RFID passive temperature measurement tag for the power cable joint as claimed in claim 1, wherein the energy collection unit comprises an energy acquisition element, a rectifier, a voltage regulator, a lithium capacitor, a voltage regulator and an energy value judgment circuit; the energy taking element is used for picking up induced voltage from the power cable by adopting an electromagnetic induction principle; the rectifier is used for rectifying the picked-up induction voltage and storing electric energy in the lithium capacitor; the energy value judging circuit is used for acquiring and judging voltage values at two ends of the lithium capacitor; when the voltage at the two ends of the lithium capacitor exceeds a preset voltage value, the boost converter is activated by the controller and then performs boost conversion on the voltage at the two ends of the lithium capacitor; the voltage stabilizer is used for stabilizing the output voltage obtained by the boost conversion to the direct-current voltage required by the load so as to provide a working power supply for the enhanced RFID passive temperature measurement tag.
4. The enhanced RFID passive temperature measurement tag for the power cable joint as claimed in claim 1, wherein the memory comprises a read-only memory and a read-write memory, the read-only memory is used for storing tag information, the read-write memory is used for recording temperature data collected by the temperature sensor, and the temperature data is data with time stamp.
5. The enhanced RFID passive thermometric tag of claim 1, wherein the carrier frequency of the RF antenna and RF interface is 2.4 GHz.
6. The method for measuring the temperature of a power cable joint by using the enhanced RFID passive temperature measuring tag as claimed in claim 1, which is characterized by comprising the following steps:
the radio frequency antenna receives a radio frequency signal from the tag reader and sends the radio frequency signal to the radio frequency interface;
the radio frequency interface demodulates the radio frequency signal and sends the radio frequency signal to the controller;
the controller activates the energy acquisition unit after receiving the radio frequency signal;
after the energy acquisition unit is activated by the controller, electric energy is acquired from the power cable, and a working power supply is provided for the enhanced RFID passive temperature measurement tag;
the temperature sensor collects the temperature of the power cable interface and sends temperature data to the controller under the condition that the energy collection unit provides a working power supply;
the controller stores the temperature data of the power cable interface in the memory and reads the temperature data from the memory to send to the radio frequency interface;
the radio frequency interface modulates the temperature data of the power cable interface into a radio frequency signal and sends the radio frequency signal to the tag reader through the radio frequency antenna.
7. The method according to claim 6, wherein the energy collection unit collects electric energy from the power cable by using an electromagnetic induction principle.
8. The temperature measurement method according to claim 6, wherein the energy collection unit comprises an energy acquisition element, a rectifier, a voltage regulator, a lithium capacitor, a voltage regulator, and an energy value judgment circuit; the specific method for acquiring electric energy and providing a working power supply for the enhanced RFID passive temperature measurement tag by the energy acquisition unit comprises the following steps:
the energy taking element picks up an induced voltage from the power cable by adopting an electromagnetic induction principle;
the rectifier rectifies the induction voltage picked up by the energy-taking element and stores the electric energy in the lithium capacitor;
the energy value judging circuit collects and judges voltage values at two ends of the lithium capacitor;
when the voltage at the two ends of the lithium capacitor exceeds a preset voltage value, the boost converter is activated by the controller and then performs boost conversion on the voltage at the two ends of the lithium capacitor;
the voltage stabilizer stabilizes the output voltage obtained by the boost conversion to the direct current voltage required by the load so as to provide a working power supply for the enhanced RFID passive temperature measurement tag.
9. The temperature measurement method according to claim 6, wherein the memory comprises a read-only memory and a read-write memory, the read-only memory stores label information, the read-write memory is used for recording temperature data acquired by the temperature sensor, and the temperature data is data with a time stamp; when the controller reads the temperature data from the read-write memory, the controller also reads the label information from the read-only memory, and the temperature data and the label information are integrated and then sent to the radio frequency interface for modulation.
10. The method of claim 6, wherein the carrier frequency of the RF antenna and RF interface is 2.4 GHz.
CN202011256503.7A 2020-11-11 2020-11-11 Enhanced RFID passive temperature measurement label for power cable connector and temperature measurement method Pending CN112362188A (en)

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Application Number Priority Date Filing Date Title
CN202011256503.7A CN112362188A (en) 2020-11-11 2020-11-11 Enhanced RFID passive temperature measurement label for power cable connector and temperature measurement method

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Application Number Priority Date Filing Date Title
CN202011256503.7A CN112362188A (en) 2020-11-11 2020-11-11 Enhanced RFID passive temperature measurement label for power cable connector and temperature measurement method

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Publication Number Publication Date
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CN110659711A (en) * 2019-10-16 2020-01-07 浙江悦和科技有限公司 RFID temperature measurement label for cable connector, installation method and temperature measurement method
CN110770754A (en) * 2017-06-28 2020-02-07 兰洛克控股有限责任公司 Energy harvesting RFID circuits, energy harvesting RFID tags, and related methods
CN210515343U (en) * 2019-10-16 2020-05-12 浙江悦和科技有限公司 RFID temperature measurement label for cable joint and mounting structure thereof
CN211319271U (en) * 2019-10-04 2020-08-21 海王数据信息技术(天津)有限公司 RFID passive chip capable of measuring temperature and RFID temperature measurement label

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Publication number Priority date Publication date Assignee Title
CN202024833U (en) * 2010-11-11 2011-11-02 浙江图维电力科技有限公司 Cable joint accurate temperature measurement device based on radio frequency technique
CN105222915A (en) * 2015-10-31 2016-01-06 深圳市金瑞铭科技有限公司 A kind of cable temperature measuring equipment based on RFID technique
CN106768443A (en) * 2016-12-28 2017-05-31 国网山东省电力公司济南供电公司 A kind of high-tension cable conductor temperature measurement apparatus
CN206638359U (en) * 2016-12-28 2017-11-14 国网山东省电力公司济南供电公司 A kind of high-tension cable conductor temperature measurement apparatus
CN110770754A (en) * 2017-06-28 2020-02-07 兰洛克控股有限责任公司 Energy harvesting RFID circuits, energy harvesting RFID tags, and related methods
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CN109781303A (en) * 2019-03-16 2019-05-21 江明鸿 A kind of the conductor temp measuring method and device of separable cable connector
CN211319271U (en) * 2019-10-04 2020-08-21 海王数据信息技术(天津)有限公司 RFID passive chip capable of measuring temperature and RFID temperature measurement label
CN110659711A (en) * 2019-10-16 2020-01-07 浙江悦和科技有限公司 RFID temperature measurement label for cable connector, installation method and temperature measurement method
CN210515343U (en) * 2019-10-16 2020-05-12 浙江悦和科技有限公司 RFID temperature measurement label for cable joint and mounting structure thereof

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