Array type orientation identification method and system

Abstract

The invention discloses an array type orientation identification technology and system, and relates to the technical field of radio frequency identification, antennas are arranged on all side surfaces of target objects, the target objects are stacked, and the antennas are used for sending wireless signals and receiving wireless signals sent by antennas on other target objects; the controller is connected with the antenna through the sending unit, and the antenna is connected with the controller through the receiving unit; when a signal is sent, the sending unit modulates a modulation signal to the system carrier frequency of the antenna, and the antenna radiates the modulated wireless signal to the surrounding space. When the signal is received, the receiving unit processes the wireless signal picked up by the antenna in real time and sends the picked-up wireless signal to the controller; the controller decodes the received information; the antennas circularly and alternately work in a reciprocating mode according to the sending and receiving time sequence, information is sent and received through the same antenna, the structure is relatively simple, and cost is low.

Description

Technical Field

[0001] The present invention relates to the field of radio frequency identification technology, and in particular to an array-type orientation recognition method and system. Background Art

[0002] The RFID identification system generally includes two important components: the RFID identification device host and the RFID antenna. The RFID identification device host unit is used to implement RFID protocol encoding, decoding, RF signal modulation and demodulation, etc. The RFID antenna unit is used for RF power transmission and RFID electronic tag signal coupling, etc.

[0003] In specific application systems, it is often necessary to identify the array position information of target objects relative to each other. However, existing recognition technologies cannot send and receive information on the same antenna, and the structure is complex and the cost is relatively high. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the current field of radio frequency identification technology, the present invention provides an array-type direction recognition method and system, in which a transmission unit modulates a modulated signal onto the system carrier frequency of an antenna, and the antenna radiates the modulated wireless signal to the surrounding space; a receiving unit processes the wireless signal picked up by the antenna in real time, and sends the picked up wireless signal to a controller, and the controller decodes the received information, so that information can be sent and received on the same antenna, and the structure is relatively simple and the cost is low.

[0005] To achieve the above object, the embodiments of the present invention adopt the following technical solutions: An array-type orientation recognition method comprises the following steps: Deploy antennas on each side of the target object, the target objects are stacked on each other so that the antenna on each side of the target object is connected to the antenna on the adjacent target object, and the antenna is used to send wireless signals and receive wireless signals sent by the antenna on the adjacent target object; Connect the controller to the antenna via the sending unit, and connect the antenna to the controller via the receiving unit; When sending a signal, the transmitting unit modulates the modulated signal onto the system carrier frequency of the antenna, and the antenna radiates the modulated wireless signal to the surrounding space; When receiving a signal, the receiving unit processes the wireless signal picked up by the antenna in real time and sends the picked up wireless signal to the controller; The controller decodes the information transmitted by the receiving unit; The antenna works alternately and cyclically according to the sending and receiving timing sequence.

[0006] According to one aspect of the present invention, the antennas work alternately and cyclically according to the sending and receiving timing sequence, and at the same time, all antennas of the target object are in the sending state or the receiving state at the same time.

[0007] According to one aspect of the present invention, in the process of connecting the controller to the antenna via the transmitting unit and connecting the antenna to the controller via the receiving unit, the antenna operates in an LC resonant circuit mode, and the LC resonant frequency is the system carrier frequency.

[0008] According to one aspect of the present invention, when sending a signal, the sending unit modulates the modulated signal to the system carrier frequency of the antenna, and the antenna radiates the modulated wireless signal to the surrounding space. It also includes a power amplifier, which amplifies the power of the wireless signal modulated by the sending unit, and then radiates the power-amplified wireless signal to the surrounding space through the antenna, forming an electromagnetic wave.

[0009] According to one aspect of the present invention, when receiving a signal, the receiving unit processes the wireless signal picked up by the antenna in real time and sends the picked up wireless signal to the controller. It also includes a bandpass filter and a shaping circuit. The bandpass filter filters and amplifies the wireless signal picked up by the antenna, and the shaping circuit performs square wave shaping on the filtered and amplified wireless signal.

[0010] According to one aspect of the present invention, when the controller decodes the information transmitted by the receiving unit, the controller decodes the input signal data according to the agreed communication protocol and restores the device identifier, thereby confirming the device identifier corresponding to the target object received by the antenna.

[0011] According to one aspect of the present invention, the device identifier is a string of N-byte data streams. The longer the device identifier is, the more effective information it expresses; and the shorter the device identifier is, the faster it is identified.

[0012] According to one aspect of the present invention, the frequency range of the modulation signal is between 10KHz and 100KHz, and the frequency range of the system carrier frequency is between 300KHz and 1000KHz.

[0013] According to one aspect of the present invention, the time that all antennas of the target object are simultaneously in a receiving state is much longer than the time that they are simultaneously in a transmitting state.

[0014] An array-type orientation recognition system includes a controller and a plurality of basic units connected thereto, wherein the basic units include a sending unit, a receiving unit and an antenna, the controller is connected to the sending unit and the receiving unit respectively, and the other ends of the sending unit and the receiving unit are connected to the antenna, the sending unit modulates its own device identifier signal and transmits it to the antenna, the antenna transmits the received own device identifier signal outward, then receives the device identifiers sent by other target objects, and transmits them to the controller through the receiving unit, and the antenna works alternately and cyclically according to the sending and receiving timing sequence.

[0015] The advantages of the implementation of the present invention are as follows: by deploying antennas on each side of the target object, the target objects are stacked on each other, the antenna is connected to the controller, and a sending unit and a receiving unit are arranged between the antenna and the controller; when sending a signal, the sending unit modulates the modulated signal to the system carrier frequency of the antenna, and the antenna radiates the modulated wireless signal to the surrounding space; when receiving a signal, the receiving unit processes the wireless signal picked up by the antenna in real time, and sends the picked up wireless signal to the controller; the controller decodes the received information, and the target objects are stacked in an array; the antenna works alternately and cyclically according to the sending and receiving timing sequence and sends and receives information through the same antenna, and the structure is relatively simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the internal antenna deployment of a target object of an array-type position recognition method and system according to the present invention; Figure 2 An array stacking diagram of target objects in an array orientation recognition method and system according to the present invention; Figure 3 A hardware circuit connection block diagram of an array-type orientation recognition method and system according to the present invention; Figure 4 A modulation and demodulation circuit diagram of an array-type orientation recognition method and system according to the present invention; Figure 5 A schematic diagram of the working sequence of an array-type orientation recognition method and system according to the present invention; Figure 6 A schematic diagram of the content of a message sent by an array-type position recognition method and system according to the present invention.

[0018] Description of reference numerals: 1. Basic unit; 2. Second basic unit; 3. Third basic unit; 4. Fourth basic unit; 5. First antenna; 6. First sending unit; 7. First receiving unit; 8. Second antenna; 9. Second sending unit; 10. Second receiving unit; 11. Third antenna; 12. Third sending unit; 13. Third receiving unit; 14. Fourth antenna; 15. Fourth sending unit; 16. Fourth receiving unit; 17. Controller; 18. First sending timing; 19. First receiving timing; 20. Second sending timing; 21. Second receiving timing; 22. Device identifier; 23. Modulation circuit; 24. Power amplifier; 25. Bandpass filter; 26. Shaping circuit. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Embodiment 1

[0021] like Figures 1 to 6 As shown, an array-type orientation recognition method, which relates to the field of radio frequency identification technology, comprises the following steps: S1: Deploy antennas on each side of a target object, and the target objects are stacked on each other so that the antenna on each side of the target object is connected to the antenna on an adjacent target object, and the antenna is used to send wireless signals and receive wireless signals sent by the antenna on the adjacent target object.

[0022] Place the target item as follows: Figure 2 As shown in the stack, the surfaces of two adjacent target objects are in contact with each other, and the corresponding antennas on each surface send and receive wireless signals to each other.

[0023] S2: Connecting the antenna to the controller, wherein a sending unit and a receiving unit are arranged between the antenna and the controller.

[0024] The antenna works in the LC resonant circuit mode, and the LC resonant frequency is the system carrier frequency.

[0025] S3: When sending a signal, the sending unit modulates the modulated signal to the system carrier frequency of the antenna, and the antenna radiates the modulated wireless signal to the surrounding space.

[0026] It also includes a modulation circuit and a power amplifier. The transmitting unit modulates the modulation signal to the system carrier frequency of the antenna through the modulation circuit. The power amplifier amplifies the wireless signal modulated by the transmitting unit, and then radiates the amplified wireless signal to the surrounding space through the antenna to form an electromagnetic wave. The frequency range of the modulation signal is between 10KHz and 100KHz, and the frequency range of the system carrier frequency is between 300KHz and 1000KHz.

[0027] S4: When receiving a signal, the receiving unit processes the wireless signal picked up by the antenna in real time and sends the picked up wireless signal to the controller.

[0028] It also includes a bandpass filter and a shaping circuit. The bandpass filter filters and amplifies the wireless signal picked up by the antenna. The shaping circuit performs square wave shaping on the filtered and amplified wireless signal, filters out invalid signals and shapes the waveform into a square wave, which is then sent to the controller.

[0029] S5: The controller decodes the information transmitted by the receiving unit.

[0030] The controller decodes the input signal data according to the agreed communication protocol and restores the device identifier, thereby confirming the device identifier corresponding to the target item received by the antenna. The device identifier is a string of N-byte data streams. The longer the device identifier is, the more effective information it expresses; the shorter the device identifier is, the faster it is identified. The antenna of the target item works alternately and cyclically according to the sending and receiving timing sequence. At the same time, all antennas of the target item are in the sending state or in the receiving state at the same time. The time that all antennas of the target item are in the receiving state at the same time is much longer than the time they are in the sending state at the same time.

[0031] The advantages of the implementation of the present invention are as follows: by deploying antennas on various sides of the target object and stacking them with other target objects, the antennas are connected to the controller, and a sending unit and a receiving unit are arranged between the antenna and the controller; when sending a signal, the sending unit modulates the modulated signal to the system carrier frequency of the antenna, and the antenna radiates the modulated wireless signal to the surrounding space; when receiving a signal, the receiving unit processes the wireless signal picked up by the antenna in real time, and sends the picked up wireless signal to the controller; the controller decodes the received information; the antenna works alternately and cyclically according to the sending and receiving timing sequence and sends and receives information through the same antenna, the target objects are stacked in an array, and information is sent and received through the same antenna, the structure is relatively simple, and the cost is low.

[0032] Embodiment 2

[0033] like Figures 1 to 6As shown, an array-type orientation recognition system relates to the field of radio frequency identification technology, and includes a controller 17 and a plurality of basic units connected thereto.

[0034] like Figure 1 As shown, basic units are deployed on the four sides of the target object, namely the first basic unit 1, the second basic unit 2, the third basic unit 3 and the fourth basic unit 4. The basic units all include a sending unit, a receiving unit and an antenna.

[0035] like Figure 2 As shown, the target objects are stacked in a 2*2 matrix, and the surfaces of two adjacent target objects are in contact with each other, and the corresponding antennas on each surface send and receive wireless signals to each other. The antennas corresponding to the adjacent sides of the target objects interact with each other to form an electromagnetic field, thereby achieving wireless communication.

[0036] like Figure 3 As shown, the first basic unit 1 includes a first transmitting unit 6, a first receiving voltage 7 and a first antenna 5, the second basic unit 2 includes a second transmitting unit 9, a second receiving unit 10 and a second antenna 8, the third basic unit 3 includes a third transmitting unit 12, a third receiving unit 13 and a third antenna 11, and the fourth basic unit 4 includes a fourth transmitting unit 15, a fourth receiving unit 16 and a fourth antenna 14. One end of the first transmitting unit 6 is connected to the controller 17, and the other end is connected to the first antenna 5; one end of the second transmitting unit 9 is connected to the controller 17, and the other end is connected to the second antenna 8; one end of the third transmitting unit 12 is connected to the controller 17, and the other end is connected to the third antenna 11; one end of the fourth transmitting unit 15 is connected to the controller 17, and the other end is connected to the fourth antenna 14. One end of the first receiving unit 7 is connected to the controller 17, and the other end is connected to the first antenna 5; one end of the second receiving unit 10 is connected to the controller 17, and the other end is connected to the second antenna 8; one end of the third receiving unit 13 is connected to the controller 17, and the other end is connected to the third antenna 11; one end of the fourth receiving unit 16 is connected to the controller 17, and the other end is connected to the fourth antenna 14. Among them, the first antenna 5, the second antenna 8, the third antenna 11 and the fourth antenna 14 work in the LC resonant circuit mode, and the LC resonant frequency is the system carrier frequency fc.

[0037] like Figure 4As shown, the modulation circuit 23, the power amplifier 24 and the antenna are connected in sequence, and the antenna is then connected to the bandpass filter and the shaping circuit in sequence. The first sending unit 6, the second sending unit 9, the third sending unit 12 and the fourth sending unit 15 modulate the modulation signal fm to the system carrier frequency fc through the modulation circuit 23, and the modulated signal is power amplified by the power amplifier 24, and the power-amplified signal is then output to the corresponding antenna. The signal picked up by the antenna is transmitted to the bandpass filter 25, and the bandpass filter 25 filters out the invalid signal and amplifies the signal. The amplified signal is sent to the shaping circuit 26 to be shaped into a square wave and sent to the controller 17. The controller 17 decodes the data stream according to the agreed communication protocol and restores the device identifier 22, thereby confirming the device identifier 22 of the adjacent target item. In this embodiment, the frequency of the modulation signal fm is 26KHz, and the frequency of the carrier signal fc is 423KHz.

[0038] like Figure 5 As shown, TX is a data transmission time slot, including a first transmission time 18 and a second transmission time 20, and RX is a data reception time slot, including a first reception time 19 and a second reception time 21. In the present invention, the first antenna 5, the second antenna 8, the third antenna 11 and the fourth antenna 14 corresponding to the target object work in accordance with the transmission and reception timing sequence. In the data transmission time slot, the four antennas are in the transmission state at the same time; in the data reception time slot, the four antennas are in the reception state at the same time. Since the target objects are in an asynchronous working mode, in order to ensure the reliability of the system, the time of the data reception time slot is much longer than the time of the data transmission time slot. In this embodiment, the data transmission time slot is set to 2ms, and the data reception time slot is set to 20ms. When the system is working, the data transmission time slot and the data reception time slot work alternately back and forth.

[0039] like Figure 6 As shown, the device identifier 22 is a string of N-byte data streams, and all target items are configured with independent device identifiers 22. The longer the device identifier 22 is, the more effective information it expresses, and the shorter the device identifier 22 is, the faster the recognition speed is. In this embodiment, the length of the device identifier 22 is set to 4 bytes in consideration of the balance between the amount of information and the recognition speed.

[0040] When the system is working, the target object sends its own device identifier 22 in real time through its antenna in the TX data transmission time slot, receives the device identifier 22 sent by the adjacent target object in the RX data reception time slot, and parses the device identifier 22 sent by the adjacent target object. In this way, each target object can obtain the device identifiers 22 of the target objects around it, thereby forming the orientation information in the matrix space.

[0041] Advantages of the implementation of the present invention: by deploying antennas on each side of the target object, the target objects are stacked in a 2*2 matrix, the antennas are connected to the controller, and a sending unit and a receiving unit are arranged between the antenna and the controller; when sending a signal, the sending unit modulates the modulated signal to the system carrier frequency of the antenna, and the antenna radiates the modulated wireless signal to the surrounding space; when receiving a signal, the receiving unit processes the wireless signal picked up by the antenna in real time, and sends the picked up wireless signal to the controller; the controller decodes the received information; the antenna works alternately and cyclically according to the sending and receiving timing sequence and sends and receives information through the same antenna, the target objects are stacked in an array, and information is sent and received through the same antenna, the structure is relatively simple, and the cost is low.

[0042] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the art within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An array-type orientation recognition method, characterized in that: The following steps are involved: Deploy antennas on each side of the target object, the target objects are stacked on each other so that the antenna on each side of the target object is connected to the antenna on the adjacent target object, and the antenna is used to send wireless signals and receive wireless signals sent by the antenna on the adjacent target object; Connect the controller to the antenna via the sending unit, and connect the antenna to the controller via the receiving unit; When sending a signal, the transmitting unit modulates the modulated signal onto the system carrier frequency of the antenna, and the antenna radiates the modulated wireless signal to the surrounding space; When receiving a signal, the receiving unit processes the wireless signal picked up by the antenna in real time and sends the picked up wireless signal to the controller; The controller decodes the information transmitted by the receiving unit; The antenna works alternately and cyclically according to the sending and receiving timing sequence.

2. The array-based position recognition method according to claim 1, characterized in that: The antennas work alternately and cyclically according to the sending and receiving timing sequence, and at the same time, all antennas of the target object are in the sending state or the receiving state at the same time.

3. The array-based position recognition method according to claim 1, characterized in that: The controller is connected to the antenna via the transmitting unit, and the antenna is connected to the controller via the receiving unit. The antenna works in an LC resonant circuit mode, and the LC resonant frequency is the system carrier frequency.

4. The array-based position recognition method according to claim 1, characterized in that: When sending a signal, the sending unit modulates the modulated signal to the system carrier frequency of the antenna, and the antenna radiates the modulated wireless signal to the surrounding space. It also includes a power amplifier, which amplifies the power of the wireless signal modulated by the sending unit, and then radiates the power-amplified wireless signal to the surrounding space through the antenna, forming an electromagnetic wave.

5. The array-based position recognition method according to claim 1, characterized in that: When receiving a signal, the receiving unit processes the wireless signal picked up by the antenna in real time and sends the picked up wireless signal to the controller. It also includes a bandpass filter and a shaping circuit. The bandpass filter filters and amplifies the wireless signal picked up by the antenna, and the shaping circuit performs square wave shaping on the filtered and amplified wireless signal.

6. The array-based position recognition method according to claim 1, characterized in that: When the controller decodes the information transmitted by the receiving unit, the controller decodes the input signal data according to the agreed communication protocol and restores the device identifier, thereby confirming the device identifier corresponding to the target object received by the antenna.

7. The array-based position recognition method according to claim 6, characterized in that: The device identifier is a string of N-byte data streams. The longer the device identifier is, the more effective information it expresses; and the shorter the device identifier is, the faster it is identified.

8. The array-based position recognition method according to claim 1, characterized in that: The frequency range of the modulation signal is between 10KHz and 100KHz, and the frequency range of the system carrier frequency is between 300KHz and 1000KHz.

9. The array-based position recognition method according to any one of claims 1 to 8, characterized in that: The time that all antennas of the target object are simultaneously in the receiving state is much longer than the time that they are simultaneously in the transmitting state.

10. An array-type position recognition system, comprising a controller and a plurality of basic units connected thereto, characterized in that: The basic unit includes a sending unit, a receiving unit and an antenna. The controller is connected to the sending unit and the receiving unit respectively. The other ends of the sending unit and the receiving unit are connected to the antenna. The sending unit modulates the device identifier signal and transmits it to the antenna. The antenna sends the received device identifier signal to the outside, then receives the device identifier sent by other target items, and transmits it to the controller through the receiving unit. The antenna works alternately and cyclically according to the sending and receiving timing sequence.

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