Goods array type positioning device

Abstract

The invention discloses a goods array type positioning device, and relates to the technical field of radio frequency identification, antennas are arranged on all side surfaces of target articles, the target articles are stacked, and the antennas are used for sending wireless signals and receiving wireless signals sent by antennas on other target articles; the controller is connected with the antenna through the sending module, and the antenna is connected with the controller through the receiving module; when a signal is sent, the sending module 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 module processes a 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 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 technical field of radio frequency identification, and particularly to an array positioning device for goods. Background Art

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

[0003] In a specific application system, it is often necessary to identify the array orientation information between target items. However, the existing identification technologies cannot send and receive information on the same antenna, with complex structures and relatively high costs. Summary of the Invention

[0004] In view of the above deficiencies in the current technical field of radio frequency identification, the present invention provides an array positioning device for goods. The modulation signal is modulated onto the system carrier frequency of the antenna by a transmission module, and the antenna radiates the modulated wireless signal into the surrounding space. The receiving module 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, enabling sending and receiving information on the same antenna, with a relatively simple structure and low cost.

[0005] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0006] An array positioning device for goods includes a controller for decoding information and a plurality of functional modules connected thereto. The functional modules include:

[0007] Antennas are deployed on each side of the goods. By stacking the goods on top of each other, the antennas on each side of the goods are connected to the antennas on adjacent goods. The antennas send out their own device identifier signals and then receive the device identifier signals sent by other goods, working in a cyclic and alternating manner according to the sending and receiving time sequence.

[0008] A transmission module is connected between the controller and the antenna. When sending a signal, the transmission module modulates the modulation signal onto the system carrier frequency of the antenna, causing the antenna to radiate the modulated wireless signal into the surrounding space.

[0009] A receiving module is connected between the antenna and the controller. When receiving a signal, the receiving module processes the wireless signal picked up by the antenna in real time and sends the picked-up wireless signal to the controller.

[0010] According to one aspect of the present invention, the antennas work in a cyclic and alternating manner according to the transmission and reception time sequence. At the same time, all the antennas of the goods are in the transmission state or in the reception state simultaneously.

[0011] According to one aspect of the present invention, the antennas operate in the LC resonance circuit mode, and the LC resonance frequency is the system carrier frequency.

[0012] According to one aspect of the present invention, the transmission module includes a power amplifier. The power amplifier amplifies the power of the wireless signal modulated by the transmission module, and then radiates the power-amplified wireless signal into the surrounding space through the antenna to form an electromagnetic wave.

[0013] According to one aspect of the present invention, the reception module includes a band-pass filter and a shaping circuit. The wireless signal received by the antenna first passes through the band-pass filter and then through the shaping circuit.

[0014] According to one aspect of the present invention, the band-pass filter filters and amplifies the wireless signal picked up by the antenna, and the shaping circuit shapes the filtered and amplified wireless signal into a square wave.

[0015] According to one aspect of the present invention, the controller decodes the input signal data according to the agreed communication protocol and restores the device identifier, so as to confirm the device identifier corresponding to the goods received by the antenna.

[0016] According to one aspect of the present invention, the device identifier is a string of N-byte data streams. If the device identifier is longer, the more effective information it expresses; if the device identifier is shorter, the faster its recognition speed.

[0017] 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.

[0018] According to one aspect of the present invention, the time when all the antennas of the goods are in the reception state is much longer than the time when they are in the transmission state.

[0019] Advantages of the implementation of the present invention: By deploying antennas on each side of the target items, the target items are stacked on top of each other. Connect the antennas to the controller, and a transmitting module and a receiving module are arranged between the antennas and the controller. When transmitting a signal, the transmitting module modulates the modulation signal onto the system carrier frequency of the antenna, and the antenna radiates the modulated wireless signal into the surrounding space. When receiving a signal, the receiving module 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 items are stacked in an array. The antennas work in a cyclic and alternating manner according to the transmission and reception timing sequences and send and receive information through the same antenna, with a relatively simple structure and low cost. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 Schematic diagram of the internal antenna deployment method of the target item of a goods array positioning device according to the present invention;

[0022] Figure 2 Array stacking diagram of the target item of a goods array positioning device according to the present invention;

[0023] Figure 3 Hardware circuit connection block diagram of a goods array positioning device according to the present invention;

[0024] Figure 4 Modulation and demodulation circuit diagram of a goods array positioning device according to the present invention;

[0025] Figure 5 Schematic diagram of the working timing of a goods array positioning device according to the present invention;

[0026] Figure 6 Schematic diagram of the content of the transmitted message of a goods array positioning device according to the present invention.

[0027] Description of the reference numerals:

[0028] 1. First functional module; 2. Second functional module; 3. Third functional module; 4. Fourth functional module; 5. First antenna; 6. First transmission module; 7. First reception module; 8. Second antenna; 9. Second transmission module; 10. Second reception module; 11. Third antenna; 12. Third transmission module; 13. Third reception module; 14. Fourth antenna; 15. Fourth transmission module; 16. Fourth reception module; 17. Controller; 18. First transmission timing; 19. First reception timing; 20. Second transmission timing; 21. Second reception timing; 22. Device identifier; 23. Modulation circuit; 24. Power amplifier; 25. Band-pass filter; 26. Shaping circuit. Detailed implementation

[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] As Figures 1 to 6 shown, an article array positioning device relates to the field of radio frequency identification technology and includes a controller 17 for decoding information and a plurality of functional modules connected thereto.

[0031] As Figure 1 shown, functional modules are deployed on the upper, lower, left, and right four sides of the target article, namely the first functional module 1, the second functional module 2, the third functional module 3, and the fourth functional module 4. Each functional module includes a transmission module, a reception module, and an antenna.

[0032] As Figure 2 shown, the target articles are stacked in a 2×2 matrix, and the surfaces between adjacent target articles are in contact with each other. The antennas corresponding to each surface transmit and receive wireless signals to each other. The antennas corresponding to adjacent side surfaces of the target articles interact with each other to form an electromagnetic field, thereby realizing wireless communication.

[0033] As Figure 3As shown in the figure, the first functional module 1 includes a first transmission module 6, a first received voltage 7, and a first antenna 5. The second functional module 2 includes a second transmission module 9, a second receiving module 10, and a second antenna 8. The third functional module 3 includes a third transmission module 12, a third receiving module 13, and a third antenna 11. The fourth functional module 4 includes a fourth transmission module 15, a fourth receiving module 16, and a fourth antenna 14. One end of the first transmission module 6 is connected to the controller 17, and the other end is connected to the first antenna 5. One end of the second transmission module 9 is connected to the controller 17, and the other end is connected to the second antenna 8. One end of the third transmission module 12 is connected to the controller 17, and the other end is connected to the third antenna 11. One end of the fourth transmission module 15 is connected to the controller 17, and the other end is connected to the fourth antenna 14. One end of the first receiving module 7 is connected to the controller 17, and the other end is connected to the first antenna 5. One end of the second receiving module 10 is connected to the controller 17, and the other end is connected to the second antenna 8. One end of the third receiving module 13 is connected to the controller 17, and the other end is connected to the third antenna 11. One end of the fourth receiving module 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 operate in the LC resonance circuit mode, and the LC resonance frequency is the system carrier frequency fc.

[0034] As Figure 4 shown in the figure, the modulation circuit 23, the power amplifier 24, and the antenna are connected in sequence, and the antenna is then connected to the band-pass filter and the shaping circuit in sequence. The first transmission module 6, the second transmission module 9, the third transmission module 12, and the fourth transmission module 15 modulate the modulation signal fm to the system carrier frequency fc through the modulation circuit 23. 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 band-pass filter 25. The band-pass filter 25 filters out the invalid signals and amplifies the signal. The amplified signal is sent to the shaping circuit 26 to be shaped into a square wave and then sent to the controller 17. The controller 17 decodes the data stream according to the agreed communication protocol and restores the device identifier 22, so as to confirm the device identifier 22 of the adjacent target item. In this embodiment, the frequency of the modulation signal fm is 26 KHz, and the frequency of the carrier signal fc is 423 KHz.

[0035] As Figure 5As shown, TX is the transmission data time slot, including a first transmission time 18 and a second transmission time 20, and RX is the reception data 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 article operate in the order of transmission and reception timing. In the transmission data time slot, the four antennas are simultaneously in the transmission state; in the reception data time slot, the four antennas are simultaneously in the reception state. Since the target articles operate in an asynchronous mode, to ensure the reliability of the system, the time of the reception data time slot is much greater than the time of the transmission data time slot. In this embodiment, the transmission data time slot is set to 2 ms, and the reception data time slot is set to 20 ms. When the system operates, the transmission data time slot and the reception data time slot alternate reciprocally.

[0036] As Figure 6 shown, the device identifier 22 is a string of N-byte data streams, and all target articles are configured with independent device identifiers 22. The longer the device identifier 22 is, the more effective information it expresses; the shorter the device identifier 22 is, the faster the recognition speed is. In this embodiment, considering the balance between the comprehensive information amount and the recognition speed, the length of the device identifier 22 is set to 4 bytes.

[0037] When the system operates, the target article transmits its own device identifier 22 outward through its antenna in the TX transmission data time slot in real time, receives the device identifier 22 sent by the adjacent target article in the RX reception data time slot, and parses the device identifier 22 sent by the adjacent target article. In this way, each target article can obtain the device identifiers 22 of the target articles around itself, thereby forming the orientation information within the matrix space.

[0038] Advantages of the implementation of the present invention: By deploying antennas on each side of the target article, the target articles are stacked in a 2×2 matrix, connecting the antennas to the controller, and a transmission module and a reception module are arranged between the antennas and the controller; when transmitting a signal, the transmission module modulates the modulation signal onto the system carrier frequency of the antenna, and the antenna radiates the modulated wireless signal into the surrounding space; when receiving a signal, the reception module 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 operate in a cyclic reciprocating and alternating manner according to the transmission and reception timing sequence and send and receive information through the same antenna. The target articles are stacked in an array and send and receive information through the same antenna, with a relatively simple structure and low cost.

[0039] As described above, it is only the specific implementation manner 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 those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims described above.

Claims

1. A product array positioning device, comprising a controller for decoding information and a plurality of functional modules connected thereto, characterized in that: The functional modules include: Antennas are deployed on all sides of the goods. The goods are stacked on each other so that the antennas on each side of the goods are connected to the antennas on the adjacent goods. The antennas send their own device identifier signals outward and then receive device identifier signals sent by other goods, and work alternately and cyclically according to the sending and receiving timing sequence; A sending module is connected between the controller and the antenna. When sending a signal, the sending module modulates the modulated signal to the system carrier frequency of the antenna, so that the antenna radiates the modulated wireless signal to the surrounding space; The receiving module is connected between the antenna and the controller. When receiving a signal, the receiving module processes the wireless signal picked up by the antenna in real time and sends the picked up wireless signal to the controller.

2. The product array positioning device according to claim 1, characterized in that: The antennas work alternately and cyclically according to the sending and receiving timing sequence. At the same time, all antennas of the goods are in the sending state or the receiving state at the same time.

3. The product array positioning device according to claim 1, characterized in that: The antenna operates in an LC resonant circuit mode, and the LC resonant frequency is the system carrier frequency.

4. The product array positioning device according to claim 1, characterized in that: The sending module includes a power amplifier, which amplifies the power of the wireless signal modulated by the sending module, and then radiates the power-amplified wireless signal to the surrounding space through an antenna to form an electromagnetic wave.

5. The product array positioning device according to claim 1, characterized in that: The receiving module includes a bandpass filter and a shaping circuit. The wireless signal received by the antenna first passes through the bandpass filter and then passes through the shaping circuit.

6. The array positioning device for goods according to claim 5, characterized in that: 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.

7. The product array positioning device according to claim 1, characterized in that: 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 goods received by the antenna.

8. The array positioning device for goods according to claim 7, 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.

9. The product array positioning device 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.

10. The product array positioning device according to any one of claims 1 to 8, characterized in that: The time that all antennas of the goods are in the receiving state at the same time is much longer than the time that they are in the transmitting state at the same time.

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