LF-RFID array monitoring device and monitoring method thereof
阅读说明：本技术 一种lf-rfid阵列监测装置及其监测方法 (LF-RFID array monitoring device and monitoring method thereof ) 是由 孙继禹 李冬明 王梅雪 于 2019-10-09 设计创作，主要内容包括：一种LF-RFID阵列监测装置及其监测方法,属于无线监测装置领域,本发明提供了一种能够长距离定位、实时监测动物轨迹、使用寿命长的LF-RFID阵列监测装置及其监测方法。本发明中,无源标签固定在动物体上,阅读器分别安装在每个线圈中间；无源标签分别与阅读器无线连接,阅读器的三个端点分别为5V电源端、GND接地端和串口端,串口端与数据处理中心的输入端连接,5V电源端用于对阅读器供电,阅读器将实时数据发送至数据处理中心。将待监测的动物放在待监测区域内,将无源标签固定在待监测的动物体上；将线圈按阵列固定在待监测区域上方,将多组阅读器通过串口分别与数据处理中心连接。本发明主要用于无线监测。(The invention discloses an LF-RFID array monitoring device and a monitoring method thereof, belongs to the field of wireless monitoring devices, and provides the LF-RFID array monitoring device and the monitoring method thereof, which can realize long-distance positioning and real-time monitoring of animal tracks and have long service life. In the invention, the passive tag is fixed on an animal body, and the readers are respectively arranged in the middle of each coil; the passive tag is respectively in wireless connection with the reader, three endpoints of the reader are respectively a 5V power end, a GND grounding end and a serial port end, the serial port end is connected with the input end of the data processing center, the 5V power end is used for supplying power to the reader, and the reader sends real-time data to the data processing center. Placing an animal to be monitored in an area to be monitored, and fixing a passive tag on the animal to be monitored; the coils are fixed above the area to be monitored according to an array, and the plurality of groups of readers are respectively connected with the data processing center through serial ports. The invention is mainly used for wireless monitoring.)
1. An LF-RFID array monitoring device is characterized by comprising a passive tag, a plurality of coils, a plurality of readers and a data processing center; each passive tag is fixed on an animal body, the plurality of coils form an LF-RFID array, and each reader is respectively arranged in the middle of each coil; each passive tag is wirelessly connected with each reader, three endpoints of each reader are a 5V power end, a GND grounding end and a serial port end, the serial port end is connected with an input end of the data processing center, the 5V power end is used for supplying power to the readers, and each reader sends real-time data to the data processing center.
2. The LF-RFID array monitoring device according to claim 1, characterized in that each reader comprises a modulation circuit, a resonance circuit, an amplification circuit and a rectification circuit, wherein the input terminals of the amplification circuit and the resonance circuit are connected to the output terminal of the modulation circuit, the output terminals of the resonance circuit and the amplification circuit are connected to the input terminal of the rectification circuit, and the output terminal of the rectification circuit is connected to the input terminal of the data processing center.
3. The LF-RFID array monitoring device of claim 2, wherein the modulation circuit comprises a micro-control chip ATTINY13-10U, resistors R503, R504, R505, R521, R530, a capacitor C504, and a power supply VCC3.3, a pin PB4 of the micro-control chip ATTINY13-10U is connected with the power supply VCC3.3 through the resistor R504, a pin VCC of the micro-control chip ATTINY13-10U is connected with the power supply VCC3.3, a pin VCC of the micro-control chip ATTINY13-10U is grounded through the capacitor C504, a pin PB2 of the micro-control chip ATTINY13-10U is grounded through the resistor R530, a pin PB2 of the micro-control chip ATTINY13-10U is connected with the power supply VCC3.3 through the resistor R503, and a pin PB 13-PB 0 of the micro-control chip ATTINY 35U is grounded through the resistor R521.
4. The LF-RFID array monitoring device as claimed in claim 3, wherein the resonant circuit comprises a logic chip CD4060B, resistors R501 and R502, capacitors C502, C503, C504, and a crystal Y501, the pin T0 of the logic chip CD4060B is connected to the pin PB3 of the ATTINY13-10U of the micro control chip, the pin T1 of the logic chip CD4060B is grounded through the capacitor C501, the pin T2 of the logic chip CD40 4060B is grounded through the resistor R502 and the capacitor C502 in turn, two ends of the crystal Y501 are connected to the pin T1 and the pin T2 of the logic chip CD4060B respectively, the resistor R501 is connected in parallel with the crystal Y501, the pin RST of the logic chip CD40 4060B is connected to the pin GND and grounded, the pin CD4060B is connected to the power supply 3.3, and two ends of the capacitor C4063503 are connected to the pins VDD and VDD of the logic chip VCC 4060B respectively.
5. An LF-RFID array monitoring device according to claim 4, characterized in that the amplifying circuit comprises an amplifying chip LM358, resistors R507, R508, R509, R510, R511, R512, R513, R514, R515, R516, R517, R518, R519, R520, R522, a capacitor C505, C509, C510, C511, C513, C514, C515, C516, an inductor, L501, a diode D501, a thyristor Q501, Q502, the VIO of the amplifying chip LM358 is connected with the PB0 of the micro-control chip ATTINY13-10U through a resistor R508, the VIO of the amplifying chip LM358 is connected with the V1+ in parallel and is grounded through a resistor R515, the V1-LM is grounded through a resistor R512, one end of the resistor R510 is connected with the power supply 3.3, the other end of the resistor R512 is connected with the VCC 56, the V513 of the amplifying chip LM358 is connected with the two ends of the resistor R29 and the LM 29-1, one end of the resistor R517 is connected between a pin V1+ and a resistor R515 of the amplification chip LM358, the other end of the resistor R517 is grounded through a capacitor C515, a pin GND of the amplification chip LM358 is connected with a ground end of the capacitor C515, a pin VCC of the amplification chip LM358 is connected with a power supply VCC3.3, two ends of the resistor R514 are respectively connected with a pin V2O and a pin V2-of the amplification chip LM358, the capacitor C510 is connected in parallel with the resistor R514, a pin V2O of the amplification chip LM358 is connected with a pin VI + of the amplification chip LM358 sequentially through a capacitor C509 and a resistor R509, a pin V2-of the amplification chip LM358 is connected with a pin V2+, a pin V2+ of the amplification chip LM358 is respectively grounded through a resistor R518, a resistor R519, a capacitor C513, a resistor R520 and a capacitor C514, one end of the capacitor C513 is connected between a pin V2+ 358 and the other end of the amplification chip LM 2, one end of the diode D501 is connected between a resistor R520 and a capacitor C516, the other end of the diode D501 is grounded sequentially through the resistor R516 and the capacitor C511, a collector of the thyristor Q501 is connected with a power supply VCC3.3, a collector of the thyristor Q501 is grounded through a capacitor C505, a base of the thyristor Q501 is connected with a base of the thyristor Q502, an emitter of the thyristor Q501 is connected with a collector of the thyristor Q502, an emitter of the thyristor Q502 is grounded, two ends of the resistor R511 are respectively connected with a base and an emitter of the thyristor Q502, one end of the resistor R508 is connected between the emitter of the thyristor Q501 and the collector of the thyristor Q502, the other end of the resistor R508 is grounded sequentially through a resistor R508, an inductor L501 and a capacitor C511, one end of the resistor R507 is connected between the base of the thyristor Q501 and the base of the thyristor Q502, and the other end of the.
6. An LF-RFID array monitoring device according to claim 5, wherein the rectification circuit comprises a RF chip RF125-IC, resistors R1, R2, R3, R4, R5, R6, capacitors C1, C2, C3, C4, a diode D5, and a connection terminal J1, the pin A1 of the RF chip RF125-IC is grounded via a resistor R5, a capacitor C3 and a capacitor C2 in sequence, the resistor R6 is connected in parallel with the capacitor C2, the pin VCC of the RF125-IC is connected with the port 2 of the connection terminal J1, the pin A2 of the RF chip RF125-IC is connected between the resistor R5 and the capacitor C3, the pin GND of the RF chip RF125-IC is grounded, the pin XH of the RF chip RF125-IC is connected with the port 4 of the TXJ 1, the pin D of the RF chip RF125-IC is connected with the pin 3 of the connection terminal J1, a pin LS of the radio frequency chip RF125-IC is connected with a port 5 of a connecting terminal J1, a pin L of the radio frequency chip RF125-IC is connected with a port 6 of a connecting terminal J1 through a resistor R2, one end of the resistor R1 is connected with a port 2 of a connecting terminal J1, the other end of the resistor R1 is connected with a port 6 of a connecting terminal J1, a port 7 of the connecting terminal J1 is grounded through a capacitor C1, one end of a diode D5 is connected with a port 7 of a connecting terminal J1, the other end of the diode D5 is connected between a capacitor C3 and a capacitor C2, one end of the capacitor C4 is connected with a grounding end of a capacitor C1, the other end of the capacitor D1 is connected with a pin A1 of the radio frequency chip RF125-IC, two ends of the resistor R3 are respectively connected with a pin VCC and a pin A1 of the radio frequency chip RF125-IC, one end of; and a pin PB1 of the micro-control chip ATTINY13-10U is connected with the cathode of the diode D5 through the resistor R505.
7. A monitoring method of LF-RFID array monitoring devices according to claim 1, characterized in that it comprises the following steps:
firstly, placing an animal to be monitored in an area to be monitored, and fixing a passive tag on the animal to be monitored;
secondly, placing a plurality of groups of readers in the coils, fixing the coils above the area to be monitored according to the array, and respectively connecting the plurality of groups of readers with a data processing center through serial ports;
and step three, the plurality of groups of readers monitor the positions of the passive tags in real time, generate motion tracks and transmit the motion tracks to a data processing center.
Technical Field
The invention belongs to the field of wireless monitoring devices, and particularly relates to an LF-RFID array monitoring device and a monitoring method thereof.
Background
The Radio Frequency Identification (RFID) technology is an automatic identification technology, and non-contact communication is performed by means of electromagnetic induction to achieve the purpose of target identification and data exchange, and RFID tags are classified into Low Frequency (LF), High Frequency (HF), Ultra High Frequency (UHF) and other types according to different working frequencies, and the working principle and identification distance of RFID systems with different frequencies are different. To read the passive low-frequency tag, sufficient energy must be generated by means of electromagnetic induction to drive a chip in the tag, so that the tag must be located in a near field region radiated by a reader antenna, which results in a short communication distance of the LF-RFID. In recent years, the RFID passive tag is excellent in the field of animal individual identification, and can conveniently read the animal number information by a reader, but cannot monitor the animal movement track and life habit only by a single induction coil.
Therefore, a long-distance positioning, real-time monitoring and long-service life LF-RFID array monitoring device and a monitoring method thereof are needed.
Disclosure of Invention
Aiming at the defects that the existing monitoring device cannot monitor in a long distance and in real time and has short service life, the invention provides the LF-RFID array monitoring device and the monitoring method thereof, which can position in a long distance and monitor the animal track in real time and have long service life.
The invention relates to an LF-RFID array monitoring device and a monitoring method thereof, and the technical scheme is as follows:
the invention relates to an LF-RFID array monitoring device, which comprises a passive tag, a plurality of coils, a plurality of readers and a data processing center, wherein the passive tag is connected with the plurality of coils; each passive tag is fixed on an animal body, the plurality of coils form an LF-RFID array, and each reader is respectively arranged in the middle of each coil; each passive tag is wirelessly connected with each reader, three endpoints of each reader are a 5V power end, a GND grounding end and a serial port end, the serial port end is connected with an input end of the data processing center, the 5V power end is used for supplying power to the readers, and each reader sends real-time data to the data processing center.
Further: each reader comprises a modulation circuit, a resonance circuit, an amplification circuit and a rectification circuit, wherein the input ends of the amplification circuit and the resonance circuit are connected with the output end of the modulation circuit, the output ends of the resonance circuit and the amplification circuit are connected with the input end of the rectification circuit, and the output end of the rectification circuit is connected with the input end of the data processing center.
Further: the modulation circuit comprises a micro-control chip ATTINY13-10U, resistors R503, R504, R505, R521, R530, a capacitor C504 and a power supply VCC3.3, wherein a pin PB4 of the micro-control chip ATTINY13-10U is connected with the power supply VCC3.3 through the resistor R504, a pin VCC of the micro-control chip ATTINY13-10U is connected with the power supply VCC3.3, a pin VCC of the micro-control chip ATTINY13-10U is grounded through the capacitor C504, a pin PB2 of the micro-control chip ATTINY13-10U is grounded through the resistor R530, a pin PB2 of the micro-control chip ATNY 13-10U is connected with the power supply VCC3.3 through the resistor R503, and a pin PB0 of the micro-control chip ATTINY13-10U is grounded through the resistor R521.
Further: the resonant circuit comprises a logic chip CD4060B, resistors R501 and R502, capacitors C502 and C503, a C504 and a crystal Y501, wherein a pin T0 of the logic chip CD4060B is connected with a pin PB3 of an ATTINY13-10U, a pin T1 of the logic chip CD4060B is grounded through the capacitor C501, a pin T2 of the logic chip CD4060B is grounded sequentially through the resistor R502 and the capacitor C502, two ends of the crystal Y501 are respectively connected with the pin T1 and the pin T2 of the logic chip CD40 4060B, the resistor R501 is connected with the crystal Y501 in parallel, a pin RST of the logic chip CD40 4060B is connected with a pin GND and grounded, a pin VDD of the logic chip CD4060B is connected with a power supply VCC3.3, and two ends of the capacitor C503 are respectively connected with a pin and a pin GND of the logic chip CD40 4060B.
Further: the amplifying circuit comprises an amplifying chip LM358, resistors R507, R508, R509, R510, R511, R512, R513, R514, R515, R516, R517, R518, R519, R520, R522, capacitors C505, C509, C510, C511, C513, C514, C515, C516, an inductor, L501, a diode D501, a thyristor Q501, and a Q502, wherein a pin VIO of the amplifying chip LM358 is connected with a pin PB0 of a micro-control chip ATTINY13-10U through a resistor R508, a pin VIO of the amplifying chip LM358 is connected with a pin V1+ in parallel and is grounded through a resistor R515, a pin V1-of the amplifying chip LM358 is grounded through a resistor R512, one end of the resistor R510 is connected with a power supply VCC 3.3.3, the other end of the resistor R512 is connected between the resistor R512 and a pin V1-of the amplifying chip LM, two ends of the resistor R513 are respectively connected with a pin V2-517 of the amplifying chip 358 and a pin V1, and one end of the amplifying
Further: the rectifying circuit comprises a radio frequency chip RF125-IC, resistors R1, R2, R3, R4, R5, R6, capacitors C1, C2, C3, C4, a diode D5 and a connecting terminal J1, wherein a pin A1 of the radio frequency chip RF125-IC is grounded through a resistor R5, a capacitor C3 and a capacitor C2 in sequence, the resistor R6 is connected in parallel with the capacitor C2, a pin VCC of the radio frequency chip RF125-IC is connected with a
A monitoring method based on the LF-RFID array monitoring device comprises the following steps:
firstly, placing an animal to be monitored in an area to be monitored, and fixing a passive tag on the animal to be monitored;
secondly, placing a plurality of groups of readers in the coils, fixing the coils above the area to be monitored according to the array, and respectively connecting the plurality of groups of readers with a data processing center through serial ports;
and step three, the plurality of groups of readers monitor the positions of the passive tags in real time, generate motion tracks and transmit the motion tracks to a data processing center.
The LF-RFID array monitoring device and the monitoring method thereof have the beneficial effects that:
when an animal wearing a low-frequency passive tag moves in a cage, different readers continuously sense the position of the tag, and all position data form a track, so that the movement track of the animal is monitored, when the observed animal stays at one position for a long time or moves frequently (restless), an observer can remotely know the movement track, and the observer can pre-judge the life habit of the animal to be observed through the data. The device can work in a severe working environment, and dust, darkness and animal excrement cannot interfere communication; the LF-RFID array comprises a plurality of readers, and reading without dead angles can be realized in a designated space; the communication distance is increased, and the reading distance of the LF-RFID array can reach 1 m. The tags used by the device are passive tags, and energy is obtained by means of electromagnetic induction without charging or battery replacement; the access voltage of the reader is only 5V, and 9 square coils per square meter have the advantages of low power consumption, low cost and long service life. The device can monitor in real time, information read by the reader is sent to the data processing center in real time through the serial port, manual intervention is not needed, and once the reader scans the label, the monitoring device automatically operates.
Drawings
FIG. 1 is a schematic structural diagram of an LF-RFID array monitoring device per square meter;
FIG. 2 is a schematic diagram of the structural connection of the reader;
FIG. 3 is a block diagram of a reader;
FIG. 4 is a trace plot of monitored signals of the reader per square meter;
FIG. 5 is a diagram of a circuit of the reader;
FIG. 6 is a second circuit diagram of the reader;
fig. 7 is a flow chart of a monitoring method of the LF-RFID array monitoring device.
Detailed Description
The technical solutions of the present invention are further described below with reference to the following examples, but the present invention is not limited thereto, and any modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
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