阅读说明：本技术 一种电线信息撷取系统及其方法 (Wire information acquisition system and method thereof ) 是由 余志成 林信岳 于 2020-03-20 设计创作，主要内容包括：一种电线信息撷取系统,包括：RFID卷标、RFID读取器及数据中心。RFID卷标用于取得电线的感测信息,发送感测信息及RFID卷标的识别信息。RFID读取器用于发射高频电磁波触发RFID卷标并收发RFID卷标发送的感测信息及识别信息。数据中心与RFID读取器通讯连接,根据所接收的感测信息及识别信息判断接收到的感测信息种类,进行数据分析。(An electrical wire information acquisition system comprising: RFID label, RFID reader and data center. The RFID tag is used to acquire sensing information of the wire and transmit the sensing information and identification information of the RFID tag. The RFID reader is used for emitting high-frequency electromagnetic waves to trigger the RFID volume label and receiving and sending sensing information and identification information sent by the RFID volume label. The data center is in communication connection with the RFID reader, and judges the type of the received sensing information according to the received sensing information and the identification information to analyze data.)

1. A method for retrieving wire information, the method comprising the steps of:

transmitting high-frequency electromagnetic waves through the RFID reader to trigger the RFID tag;

transmitting a trigger signal to the RFID reader through the RFID tag to inform the RFID reader to suspend transmitting the high-frequency electromagnetic wave;

acquiring sensing information of the wire through the RFID tag, wherein the sensing information comprises current, temperature and humidity of the wire;

transmitting the sensing information and the identification information of the RFID tag to the RFID reader through the RFID tag, and resuming the transmission of the high frequency electromagnetic wave after the RFID reader receives the sensing information;

communicating with the RFID reader via a data center, the RFID reader transmitting the sensing information and the identification information to the data center; and

and judging the type of the received sensing information according to the identification information through the data center, and performing data analysis.

2. The method as claimed in claim 1, wherein the identification information comprises a number of the RFID tag and an identifier of the sensing information, and the type of the sensing information is determined according to the identifier.

3. The method for retrieving wire information as claimed in claim 1, wherein the communication link comprises: the link of wired network communication is carried out by the mode of Ethernet, and the link of wireless network is carried out by the mode of 4G, 5G, Wi-Fi and Bluetooth.

4. The method of claim 1, further comprising the steps of:

acquiring first wire information of a first wire through a first RFID tag, and transmitting the first wire information and first identification information of the first RFID tag;

acquiring second wire information of a second wire through a second RFID tag, and transmitting the second wire information and second identification information of the second RFID tag;

receiving the first wire information, the first identification information, the second wire information, and the second identification information through the RFID reader, and transmitting the first wire information, the first identification information, the second wire information, and the second identification information to the data center;

the data center determines that the first wire information is from the first RFID tag based on the first identification information, and determines that the second wire information is from the second RFID tag based on the second identification information.

5. An electrical wire information acquisition system, comprising:

an RFID tag for acquiring sensing information of the wire, the sensing information including a current, a temperature, and a humidity of the wire, and transmitting the sensing information and identification information of the RFID tag itself;

an RFID reader for emitting a high frequency electromagnetic wave to trigger the RFID tag and transmitting and receiving the sensing information and the identification information transmitted from the RFID tag;

and a data center which is in communication link with the RFID reader and is used for receiving the sensing information and the identification information, judging the type of the received sensing information according to the identification information and analyzing data.

6. The wire information retrieval system of claim 5, wherein the RFID tag comprises:

a label clamp for clamping the electric wire;

a temperature and humidity sensor for acquiring the temperature and the humidity to generate temperature and humidity information;

a coil antenna for receiving the high frequency electromagnetic wave transmitted from the RFID reader, receiving a wire electromagnetic wave radiated from the wire, transmitting the sensing information and the identification information, coupling a first induced electromotive force according to the high frequency electromagnetic wave, and generating a second induced electromotive force according to the wire electromagnetic wave;

the amplifying circuit is electrically connected to the coil antenna, generates a trigger signal according to the first induced electromotive force and generates current information according to the second induced electromotive force; and

and a microprocessor, coupled to the temperature and humidity sensor, for informing the RFID reader to suspend sending the high frequency electromagnetic wave through the coil antenna according to the trigger signal, obtaining the current information through the amplifying circuit, and generating the sensing information according to the temperature and humidity information and the current information.

7. The electrical wire information retrieving system as claimed in claim 5, wherein the identification information comprises a number of the RFID tag and an identifier of the sensing information, and the type of the sensing information is determined according to the identifier.

8. The wire information acquisition system of claim 5 wherein the communication link comprises: the link of wired network communication is carried out by the mode of Ethernet, and the link of wireless network is carried out by the mode of 4G, 5G, Wi-Fi and Bluetooth.

9. The wire information acquisition system of claim 5, further comprising:

a first RFID tag for acquiring first wire information of a first wire and transmitting the first wire information and first identification information of the first RFID tag itself;

a second RFID tag for acquiring second wire information of a second wire and transmitting the second wire information and second identification information of the second RFID tag itself;

the RFID reader receives the first wire information, the first identification information, the second wire information, and the second identification information, and transmits the first wire information, the first identification information, the second wire information, and the second identification information to the data center; and

the data center determines that the first wire information is from the first RFID tag based on the first identification information, and determines that the second wire information is from the second RFID tag based on the second identification information.

Technical Field

The invention relates to a technology for acquiring electric wire current and electric wire surrounding environment information, in particular to a passive and wireless method for acquiring electric wire current and temperature and humidity data.

Background

The current measurement is commonly used as a Hall current sensor, the current is introduced from a control circuit end of a Hall assembly based on a magnetic balance Hall principle, a magnetic field with magnetic induction intensity is applied to a normal direction of a control plane on the Hall assembly, an electromotive force is generated in a direction vertical to the current and the magnetic field, and the magnitude of the electromotive force is in direct proportion to the control current. However, the hall current sensor has the disadvantages that the size of the device is large, the processing circuit is not integrated, and the hall current sensor is not easy to be installed and cannot measure the temperature and humidity while measuring the current.

Disclosure of Invention

In view of the above, the present invention provides a method and a system for capturing information of an electric wire, wherein electric energy and data are transmitted by using an electromagnetic induction coupling manner, the electric wire is designed to be conveniently fixed on the electric wire to be tested in a wire clamp manner through an RFID tag, the electric wire is not required to be cut off when the electric wire is installed, a backend data center can conveniently judge which RFID tag the information comes from and judge the type of the received information and classify the data by using an identification code of the RFID tag, the electric wire is detected by using a non-contact coupling manner, direct contact with metal of the electric wire is avoided, and safety is improved.

The embodiment of the invention provides a wire information acquisition method, which comprises the following steps: transmitting high-frequency electromagnetic waves through the RFID reader to trigger the RFID tag; acquiring sensing information of the wire through the RFID tag, wherein the sensing information comprises current, temperature and humidity of the wire; transmitting the sensing information and the identification information of the RFID tag itself to the RFID reader through the RFID tag; communicating with the RFID reader via a data center, the RFID reader transmitting the sensing information and the identification information to the data center; and judging the type of the received sensing information according to the identification information through the data center, and performing data analysis.

The embodiment of the invention provides an electric wire information acquisition system, which comprises: an RFID tag that clamps a wire by a tag clamp, acquires sensing information of the wire, the sensing information including a current, a temperature, and a humidity of the wire, and transmits the sensing information and identification information of the RFID tag; an RFID reader for emitting a high frequency electromagnetic wave to trigger the RFID tag and transmitting and receiving the sensing information and the identification information transmitted from the RFID tag; and a data center which is in communication link with the RFID reader and is used for receiving the sensing information and the identification information, judging the type of the received sensing information according to the identification information and analyzing data.

The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.

Drawings

FIG. 1 is a schematic diagram of a system architecture according to an embodiment of the present invention.

Fig. 2 is a schematic plan view of an RFID tag according to an embodiment of the present invention.

FIG. 3 is a schematic side view of an RFID tag clip according to an embodiment of the invention.

FIG. 4 is a schematic diagram of an internal circuit of an RFID tag according to an embodiment of the present invention.

FIG. 5 is a flowchart illustrating the operation of an RFID reader according to an embodiment of the present invention.

FIG. 6 is a flowchart illustrating operation of an RFID tag according to an embodiment of the present invention.

Fig. 7 is a diagram illustrating an application scenario of the wire information retrieving system according to an embodiment of the present invention.

Description of the main Components

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

In order to facilitate the understanding and implementation of the present invention for those of ordinary skill in the art, the present invention will be described in further detail with reference to the accompanying drawings and examples, it being understood that the examples described herein are only for the purpose of illustration and explanation and are not intended to limit the present invention.

Fig. 1 is a schematic diagram illustrating a wire information acquisition system according to an embodiment of the invention. As shown in fig. 1, the wire information retrieving system 100 includes an RFID tag 110, a wire 120, an RFID reader 130, and a data center 140. The RFID tag 110 clamps the wire 120 in a tag clamp manner, the RFID tag 110 includes a coil antenna, and when the tag clamp of the RFID tag 110 clamps the antenna, a plane formed by the coil antenna is parallel to the wire 120, so that a magnetic line direction of an electromagnetic wave radiated from the wire 120 is perpendicular to a plane direction of the coil antenna in the RFID tag 110, and related sensing information of the wire 120 is obtained by a wireless method of electromagnetic induction. The RFID reader 120 emits high-frequency electromagnetic wave magnetic field energy to trigger the RFID tag 110, so that the RFID tag 110 starts to operate, the RFID tag 110 first emits a coding command, so that the RFID reader 120 temporarily stops emitting high-frequency electromagnetic waves, the RFID tag 110 induces electromagnetic waves radiated by the wire 120 to generate electromotive force, thereby obtaining a current value of the wire 120, and obtaining environment sensing information such as temperature and humidity near the wire 120 according to a temperature and humidity sensor in the RFID tag 110. The RFID tag 110 transmits the collected current value, temperature, humidity, and identification information of the RFID tag 110 itself to the RFID reader 130. The RFID reader 130 is communicatively linked to the data center 140, and the communication link may include a wired network communication link through an ethernet network, and a wireless network communication link through a 4G, 5G, Wi-Fi or bluetooth network. The RFID reader 130 sends the current value, the temperature, the humidity and the identification information returned by the RFID tag 110 to the data center 140, and the data center 140 determines the type of the received sensing information according to the identification information for further classification and data analysis.

Fig. 2 is a schematic plan view of an RFID tag according to an embodiment of the present invention. As shown in fig. 2, the RFID tag 210 includes a temperature/humidity sensor 211, a coil antenna 212, a microcontroller 213, and a tag clip 214. Wherein the RFID tag 210 will clamp the wire 220 through the tag clip 214, the tag clip 214 in fig. 2 is only a schematic diagram of the wire that can be clamped, and the actual tag clip structure is described in detail in fig. 3. The temperature and humidity sensor 211 is disposed on a side close to the electric wire, so that the temperature and humidity sensor 211 is as close as possible to the electric wire 220 for obtaining the temperature and humidity of the environment around the electric wire. Microcontroller 213 adopts electric connection with temperature and humidity sensor 211, and temperature and humidity sensor 211 sends the temperature and the humidity information of gathering to microcontroller 213. In addition, the microcontroller 213 is electrically connected to the coil antenna 212, the coil antenna 212 is configured to receive and transmit electromagnetic waves, receive high-frequency electromagnetic waves emitted from the RFID reader, couple the high-frequency electromagnetic waves to generate a trigger signal for driving the RFID tag 210, receive the wire electromagnetic waves radiated by the wire 220, couple the wire electromagnetic waves to generate a second induced electromotive force, capture electromagnetic waves of the wire to generate current information, and process the current information through the microprocessor 213, thereby obtaining related information of the wire 220, the microprocessor 213 transmits the obtained temperature and humidity sensing information and related information of the wire 220 to the RFID reader through the coil antenna 212 for wireless communication, and transmits the temperature and humidity sensing information, related information of the wire 220, and identification information of the RFID tag 210 to the RFID reader.

Fig. 3 shows a top view of a label clip according to an embodiment of the present invention. As shown in fig. 3, one side of the RFID tag 310 has a tag line clamp 311, the tag line clamp 311 is wedge-shaped and has a notched clip shape, and can be directly sleeved on the wire 320, a coil antenna is disposed in the RFID tag 310, when the tag line clamp 311 clamps the wire 320, a plane formed by the coil antenna is parallel to the wire 320, the wire 320 is shown by an angle of a cross section in fig. 3, wherein a normal direction of the plane formed by the coil antenna is orthogonal to an extending direction of the wire 320, an electromagnetic wave generated by the wire 320 is shown by 330, as shown in fig. 3, when the tag line clamp 311 clamps the antenna 320, the magnetic line 330 vertically enters the plane of the RFID tag 310 (as shown by an arrow in fig. 3), and the magnetic line 330 is perpendicular to the plane formed by the coil antenna in the RFID tag 310, so that the coil antenna in the RFID tag 310 can obtain a maximum magnetic flux.

Fig. 4 is a schematic diagram illustrating an internal circuit of an RFID tag according to an embodiment of the present invention. As shown in fig. 4, the internal circuit of the RFID tag 400 includes a microcontroller 401, a coil antenna 402, a transistor 403, a resistor 404, a first capacitor 405, a diode 406, a second capacitor 407, an amplifier 408, an analog/digital converter 409, and a temperature/humidity sensor 410. The transistor 403, the resistor 404, the first capacitor 405, the diode 406, the second capacitor 407, and the amplifier 408 form an amplifying circuit 411. The coil antenna 402 in the RFID tag 400 couples the RFID reader and receives the electromagnetic wave emitted from the wire to be tested to induce charges, the charges are stored in the first capacitor 405, when the charges in the first capacitor 405 are larger than those in the second capacitor 407, the first capacitor 405 transfers the charges to the second capacitor 407 through the diode 406, and when the second capacitor 407 reaches a specific voltage, the microcontroller 401 is triggered. When the microcontroller 401 is triggered, a coding command is first issued to temporarily stop the RFID reader from sending high frequency electromagnetic waves, at this time, the coil antenna 402 on the RFID tag 400 can only sense electromagnetic waves generated by wire radiation, a second induced electromotive force is generated through the coil antenna to charge the first capacitor 405, so as to generate a voltage for the resistor 404 on the path, the microcontroller 401 reads the voltage data of the resistor 404 in the amplifying circuit 411 through the analog/digital converter 409, and calculates the current information of the wire to be measured according to the measured voltage data and the known resistance value of the resistor 404. The temperature and humidity sensor 410 is electrically connected to the microcontroller 401, and the temperature and humidity sensor 410 transmits the collected temperature and humidity information to the microcontroller 401. The microcontroller 401 sends the identification information of the RFID tag 400 itself, the voltage measured by the resistor 404, and the temperature and humidity information obtained by the temperature and humidity sensor 410 to the RFID reader through the coil antenna 402, and when the RFID reader receives the identification information, the high-frequency electromagnetic wave is re-emitted, and the number and data of the corresponding RFID tag 400 are obtained, so as to monitor the current and temperature and humidity of the wire.

Fig. 5 is a flowchart illustrating the operation of the RFID reader according to the embodiment of the present invention. As shown in fig. 5, in step S501, the RFID reader emits a high-frequency electromagnetic wave, thereby driving the RFID tag that receives the high-frequency electromagnetic wave. Step S502, judging whether the instruction sent by the RFID volume label is received, if the instruction sent by the RFID volume label is not received, executing step S501 to continuously send the high-frequency electromagnetic wave, and if the instruction sent by the RFID volume label is received, executing step S503. In step S503, transmission of the high frequency electromagnetic wave is suspended. Step S504, determining whether the sensing information sent by the RFID tag is received, if the sensing information sent by the RFID tag is not received, executing step S503 to suspend transmitting the high frequency electromagnetic wave, waiting for receiving the sensing information sent by the RFID tag, and returning to step S501 when the sensing information sent by the RFID tag is received, where the RFID reader transmits the high frequency electromagnetic wave.

FIG. 6 is a flow chart illustrating operation of an RFID tag according to an embodiment of the present invention. As shown in fig. 6, in step S601, the RFID tag determines whether a high frequency electromagnetic wave is received, returns to the starting step to continue waiting if the high frequency electromagnetic wave is not received, and executes step S602 if the high frequency electromagnetic wave is received. In step S602, the coil antenna of the RFID tag is induced by the high frequency electromagnetic wave to generate an induced charge, and the generated induced charge is stored in the first capacitor of the RFID tag circuit. Step S603, comparing the voltage of the first capacitor with the voltage of the second capacitor, returning to step S602 to continue storing the generated induced charges in the first capacitor when the voltage of the first capacitor is lower than the voltage of the second capacitor, and executing step S604 to trigger the microcontroller when the voltage of the first capacitor is higher than the voltage of the second capacitor. In step S604, when the microcontroller is triggered, it first sends an instruction to the RFID reader to notify the RFID processor to suspend transmitting the high frequency electromagnetic wave. In step S605, since the RFID reader is notified to stop transmitting the high frequency electromagnetic wave, the coil antenna in the RFID tag charges the first capacitor according to the induced electromotive force generated by the electromagnetic energy around the wire to be measured, and generates a voltage on the resistor. Step S606, the microcontroller in the RFID tag starts to read the voltage value of the resistor and the temperature and humidity information of the temperature and humidity sensor, step S605 is executed to continuously charge the first capacitor when the microcontroller has not acquired the voltage value of the resistor and the temperature and humidity information, and step S607 is executed when the microcontroller has acquired the voltage value of the battery, the temperature and humidity information. In step S607, the RFID tag sends its own identification information, the voltage value of the resistor, the temperature and humidity information to the RFID reader, and then returns to step S601 to wait for receiving the high frequency electromagnetic wave.

Fig. 7 is a diagram illustrating an application scenario of the wire information retrieving system according to an embodiment of the present invention. As shown in fig. 7, the application scenarios include a first RFID tag 710, a second RFID tag 711, an nth RFID tag 712, a first wire 720, a second wire 721, an nth wire 722, an RFID reader 730, and a data center 740. The application scenario sets a plurality of RFID tags for measuring wire information at different positions, wherein a first RFID tag 710 is used for measuring first wire information of a first wire 720, a second RFID tag 711 is used for measuring second wire information of a second wire 721, an nth RFID tag 712 is used for measuring nth wire information of an nth wire 722, the first RFID tag 710 sends the measured first wire information and identification information of the first RFID tag 710 to an RFID reader 730, the second RFID tag 711 sends the measured second wire information and identification information of the second RFID tag 711 to the RFID reader 730, the nth RFID tag 712 sends the measured nth wire information and identification information of the nth RFID tag 712 to the RFID reader 730, the RFID reader 730 sends the received wire information and corresponding RFID tag identification information to a data center 740, and the data center 740 can determine which wire information comes from the RFID tag, the RFID tag according to an identifier in the identification information, The type of the wire information (wire current, voltage, temperature, humidity), the data center can perform corresponding data analysis according to the collected wire information, and the data is provided for users. For example, the current values obtained by the first RFID tag, the second RFID tag and the nth RFID tag are compared with each other to determine the power consumption information, or when an abnormal temperature or humidity is detected, the power consumption information is determined according to which RFID tag is used to transmit the abnormal temperature or humidity, and the manager is notified to remove the abnormal temperature or humidity according to the position of the RFID tag.

In summary, the present invention is in accordance with the patent requirements of the invention, and the following claims are hereby made. However, the above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited to the above embodiments, and equivalent modifications or variations, which will occur to those skilled in the art and are derived from the spirit of the present invention, should be covered by the following claims.