CN110632551A - LF-RFID array monitoring device and monitoring method thereof - Google Patents
LF-RFID array monitoring device and monitoring method thereof Download PDFInfo
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- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
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- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
- G01S1/08—Systems for determining direction or position line
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- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
- G01S1/68—Marker, boundary, call-sign, or like beacons transmitting signals not carrying directional information
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
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Abstract
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.
Description
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 chip LM 1 and the pin is connected between the pin V387 + 2-517 and the pin, The other end of the amplifying chip LM358 is grounded through a capacitor C515, a pin GND of the amplifying chip LM358 is connected with a ground end of the capacitor C515, a pin VCC of the amplifying chip LM358 is connected with a power supply VCC3.3, two ends of a resistor R514 are respectively connected with a pin V2O and a pin V2-of the amplifying chip LM358, a capacitor C510 is connected with the resistor R514 in parallel, a pin V2O of the amplifying chip LM358 is connected with a pin VI + of the amplifying chip LM358 sequentially through a capacitor C509 and a resistor R509, a pin V2-of the amplifying chip LM358 is connected with a pin V2+, a pin V2+ of the amplifying chip LM358 is grounded through a resistor R518, a resistor R519, a capacitor C513, a resistor R520 and a capacitor C514, one end of the capacitor C516 is connected between the capacitor C513 and a pin V2+ of the amplifying chip LM358, the other end of the capacitor C516 is connected between the resistor R520 and a pin V2+, and the amplifying chip LM, and one end of the diode D501 is connected, The other end of the resistor R507 is grounded sequentially through a resistor R516 and a capacitor C511, the collector of the thyristor Q501 is connected with a power supply VCC3.3, the collector of the thyristor Q501 is grounded through a capacitor C505, the base of the thyristor Q501 is connected with the base of the thyristor Q502, the emitter of the thyristor Q501 is connected with the collector of the thyristor Q502, the emitter of the thyristor Q502 is grounded, two ends of the resistor R511 are respectively connected with the base and the 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 resistor R507 is.
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 port 2 of the connecting terminal J1, a pin A2 of the radio frequency chip RF125-IC is connected between the resistor R5 and the capacitor C3, a GND pin of the radio frequency chip RF125-IC is grounded, a pin XH of the radio frequency chip RF125-IC is connected with a port 4 of the connecting terminal J1, a pin TXD of the radio frequency chip RF125-IC is connected with a port 3 of the connecting terminal J1, a pin LS 5 of the radio frequency chip RF125-IC 1 is connected with a pin L1 of the RF chip J3684 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 the port 7 of a connecting terminal J1, the other end of the diode D5 is connected between the capacitor C3 and the capacitor C2, one end of a capacitor C4 is connected with a grounding terminal of the capacitor C1, the other end of the capacitor C4 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 the resistor R4 is connected with a pin A1; and a pin PB1 of the micro-control chip ATTINY13-10U is connected with the cathode of the diode D5 through the resistor R505.
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.
Example 1
The embodiment is described with reference to fig. 1 to fig. 7, in the embodiment, the LF-RFID array monitoring device related to the embodiment includes 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. The device is a monitoring device based on a low frequency radio frequency identification (LF-RFID) array, and comprises a passive tag, a coil, a reader and a data processing center. Taking the size of fig. 1 as an example, the coils 3 x 3 with the side length of 200mm are arranged and distributed, the distance between every two coils is 200mm, and the aim of 1m pair of coils can be achieved2And the sensing distance can reach 1m by monitoring the large area and the small area. As shown in figure 2, the circuit structure of the device is relatively simple, a home-made reader is installed in the middle of each coil, all the readers are connected together through 3 lines, namely a 5V power supply, GND and a serial port, the power supply supplies power to the readers, and the serial port sends real-time data to a data processing center. 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. Another advantage of the device is that the real-time monitoring is realized, and the information read by the reader is real-time through the serial portThe time is sent to the data processing center, manual intervention is not needed, and once the reader scans the label, the monitoring device automatically operates.
More specifically: 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. The specific structure of the reader is shown in fig. 3, and it can be seen from the schematic diagram that the homemade reader comprises a modulation circuit, a resonance circuit, an amplification circuit and a rectification circuit. The cage is a cuboid with a bottom area equal to 5m × 5m and a height less than 1m, the reader part of the device is installed at the top of the cage, 45 readers are required to be installed in an area of 25m2 calculated according to the sensing distance, and fig. 4 is an installation schematic diagram in one square meter area. The coils are square with the side length of 20cm, the distance between every two adjacent coils is 20cm, the reader is installed in the center of the coils, and all the readers are connected with a 5V power supply and a serial port. The device is arranged at the top of a cage, and after a 5V power supply is connected, when a small animal wearing a passive tag enters a space with a sensing distance smaller than the sensing distance, the device can automatically run. The cage is simplified into a cuboid with the upper bottom area and the lower bottom area both being 25m2 and the height being less than 1m, the device is installed on the upper bottom surface of the cuboid, the passive RFID tag is worn on a leg or other parts of a monitoring target, after the monitoring target enters the cage, the tag obtains energy through magnetic field coupling, a reader obtains a pulse amplitude modulation signal, a low-frequency pulse signal is recovered after detection, if the tag carries the number information of the monitoring target, the number of the monitoring target is obtained after decoding, and the serial port transmits the obtained information to the data processing center in real time. Assuming that the readers No. 1, No. 2, No. 4 and No. 9 all read the signals within a period of time, the data processing center obtains the movement track of the monitored target through data processing, as shown in fig. 4; if only the reader 9 reads the signal of the monitored target in a period of time, the data processing center considers that the monitored target stays at the lower right corner of the cage in the period of time, and if the food bowl is placed at the lower right corner or the light at the lower right corner is different from that at other places, the information can also help researchers to guess the life habit of the monitored target.
More specifically: as shown in FIG. 5, the modulation circuit includes 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 PB0 of the micro-control chip ATTINY13-10U is grounded through the resistor R521. ATTINY13 is a low power consumption 8-bit CMOS microcontroller based on an enhanced AVRRISC architecture. Due to the advanced instruction set and the single-clock-cycle instruction execution time, the data throughput rate of ATTINY13 is as high as 1MIPS/MHz, so that the contradiction between the power consumption and the processing speed of the system can be relieved. The (ALU) is connected such that an instruction can access two separate registers simultaneously in one clock cycle. This architecture greatly improves code efficiency and has up to 10 times higher data throughput than a conventional CISC microcontroller. ATTINY13 has 1K byte Flash, 64 byte EEPROM, 64 byte SRAM, 6 general I/O port lines, 32 general working registers, 18 bit timer/counter with comparison mode, on/off interrupt, 4-way 10 bit ADC, programmable watchdog timer with on-chip oscillator, and three power saving modes which can be selected by software. When the CPU works in the idle mode, the CPU stops working, and the SRAM, the T/C, ADC, the analog comparator and the interrupt system continue working; in the power-down mode, the median value of the register is saved, and all functions except interrupt and hardware reset are stopped; and when the ADC noise suppression mode is in the ADC noise suppression mode, the work of the CPU and all I/O modules except the ADC is stopped so as to reduce ADC conversion noise.
More specifically: as shown in fig. 5, the resonant circuit includes a logic chip CD4060B, resistors R501 and R502, capacitors C502, C503, C504, and a crystal Y501, a pin T0 of the logic chip CD4060B is connected to a pin PB3 of the micro-control chip atm 13-10U, a pin T1 of the logic chip CD4060B is grounded through the capacitor C501, a pin T2 of the logic chip CD4060B is grounded through the resistor R502 and the capacitor C502 in sequence, two ends of the crystal Y501 are connected to a pin T1 and a pin T2 of a logic chip CD4060B, the resistor R501 is connected in parallel to the crystal Y501, a pin RST of the logic chip CD40 4060B is connected to a GND pin and is grounded, a pin VDD of the logic chip CD4060B is connected to a power supply VCC3.3, and two ends of the capacitor C503 are connected to a pin VDD and GND of the logic chip CD40 4060B, respectively. The logic chip CD4060B is a 4-bit binary serial counter. All counters are master-slave flip-flops. The counter is cleared when the count is performed on the falling edge of the clock and CR is at a high level. Since the schmitt trigger is used at the clock input, there is no limit to the pulse rise and fall times, and all inputs and outputs are buffered.
More specifically: as shown in fig. 5, the amplifying circuit includes 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, and Q502, a pin VIO of the amplifying chip LM358 is connected to a pin 39pb 56 of the micro control chip atm 13-10U through a resistor R508, a pin VIO of the amplifying chip LM358 is connected in parallel to a pin V1+ 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 to a power supply VCC3.3, the other end of the resistor R513 is connected to a pin V1-358, and the other end of the amplifying chip LM358 is connected to a pin V3892-517 through a resistor R387 2, and a pin of the amplifying chip LM358, and one end of the amplifying chip LM 515 + is connected to a pin LM358, The other end of the amplifying chip LM358 is grounded through a capacitor C515, a pin GND of the amplifying chip LM358 is connected with a ground end of the capacitor C515, a pin VCC of the amplifying chip LM358 is connected with a power supply VCC3.3, two ends of a resistor R514 are respectively connected with a pin V2O and a pin V2-of the amplifying chip LM358, a capacitor C510 is connected with the resistor R514 in parallel, a pin V2O of the amplifying chip LM358 is connected with a pin VI + of the amplifying chip LM358 sequentially through a capacitor C509 and a resistor R509, a pin V2-of the amplifying chip LM358 is connected with a pin V2+, a pin V2+ of the amplifying chip LM358 is grounded through a resistor R518, a resistor R519, a capacitor C513, a resistor R520 and a capacitor C514, one end of the capacitor C516 is connected between the capacitor C513 and a pin V2+ of the amplifying chip LM358, the other end of the capacitor C516 is connected between the resistor R520 and a pin V2+, and the amplifying chip LM, and one end of the diode D501 is connected, The other end of the resistor R507 is grounded sequentially through a resistor R516 and a capacitor C511, the collector of the thyristor Q501 is connected with a power supply VCC3.3, the collector of the thyristor Q501 is grounded through a capacitor C505, the base of the thyristor Q501 is connected with the base of the thyristor Q502, the emitter of the thyristor Q501 is connected with the collector of the thyristor Q502, the emitter of the thyristor Q502 is grounded, two ends of the resistor R511 are respectively connected with the base and the 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 resistor R507 is.
More specifically: as shown in fig. 6, the rectifier circuit includes a radio frequency chip RF125-IC, resistors R1, R2, R3, R4, R5, R6, capacitors C1, C2, C3, C4, a diode D5, and a connection terminal J1, 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 to a port 2 of the connection terminal J1, a pin a2 of the radio frequency chip RF125-IC is connected between the resistor R5 and the capacitor C3, a pin GND of the radio frequency chip RF125-IC is grounded, a pin XH of the radio frequency chip RF125-IC is connected to a port 4 of the connection terminal J1, a pin D of the radio frequency chip RF125-IC is connected to a port 3 of the connection terminal txj 1, a pin LS 1 of the radio frequency chip RF1 is connected to a port 5, a pin L of the radio frequency chip RF125-IC is connected with a port 6 of a wiring terminal J1 through a resistor R2, one end of the resistor R1 is connected with a port 2 of a wiring terminal J1, the other end of the resistor R1 is connected with a port 6 of a wiring terminal J1, a port 7 of the wiring terminal J1 is grounded through a capacitor C1, one end of a diode D5 is connected with a port 7 of a wiring terminal J1, the other end of the diode D5 is connected between a capacitor C3 and a capacitor C2, one end of a capacitor C4 is connected with a grounding end of a capacitor C1, the other end of the capacitor D4 is connected with a pin A1 of the radio frequency chip RF125-IC, two ends of a resistor R3 are respectively connected with a pin VCC and a pin A1 of the radio frequency chip RF125-IC, one end of a resistor R4 is; and a pin PB1 of the micro-control chip ATTINY13-10U is connected with the cathode of the diode D5 through the resistor R505.
Example 2
The present embodiment is described with reference to fig. 7 and embodiment 1, and in the present embodiment, a monitoring method based on the LF-RFID array monitoring device includes 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 device is used for laboratory animal monitoring, the animal (like the mice) that will wait to observe is put in the cage, this LF-RFID array monitoring devices is installed at the top of cage, when the animal of wearing low frequency passive label moves about in the cage, the position of continuous response label of different readers, all positional data form a orbit, thereby reach the monitoring to animal movement track, when being observed the animal and staying a position or frequently moving (restless) for a long time, the observation personnel can long-range understanding, in addition, the observation personnel can also wait to observe the life habit of animal through these data prejudgement.
Claims (7)
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.
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