Array-type object positioning device

Abstract

Disclosed in the present invention is an array-type object positioning device, relating to the technical field of radio frequency identification. An antenna is deployed on each side face of each target object; the target objects are stacked on each other; and the antennas are used for transmitting wireless signals and receiving wireless signals transmitted by the antennas on other target objects. A controller is connected to the antennas by means of transmitter modules, and the antennas are connected to the controller by means of receiver modules; during signal transmission, the transmitter modules modulate onto system carrier frequencies of the antennas signals to be modulated, and the antennas radiate the modulated wireless signals to a surrounding space; and during signal reception, the receiver modules process in real time wireless signals picked up by the antennas, and transmit same to the controller, and the controller decodes received information. Each antenna works alternately in a cycle according to a transmission and receiving time sequence, and information transmission and information reception are performed by the same antenna, thereby resulting in a simple structure and low cost.

Description

A cargo array positioning device Technical Field

[0001] This invention relates to the field of radio frequency identification technology, and in particular to a cargo array positioning device. Background Technology

[0002] An RFID identification system generally consists of 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, and radio frequency signal modulation and demodulation, while the RFID antenna unit is used for radio frequency power transmission and RFID electronic tag signal coupling.

[0003] In specific application systems, it is often necessary to identify the array-like orientation information between target objects. However, existing identification technologies cannot transmit and receive information on the same antenna, which is complex and relatively expensive. Summary of the Invention

[0004] In view of the above-mentioned shortcomings in the current field of radio frequency identification technology, the present invention provides a goods array positioning device. 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. 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. The device can transmit and receive information on the same antenna, which is relatively simple in construction and low in cost.

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

[0006] A goods array positioning device includes a controller for decoding information and multiple functional modules connected thereto, the functional modules including:

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

[0008] The transmitting module is connected between the controller and the antenna. When transmitting a signal, the transmitting module modulates the modulation signal onto the system carrier frequency of the antenna, so that the antenna radiates the modulated wireless signal into the surrounding space.

[0009] 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.

[0010] According to one aspect of the invention, the antennas operate alternately in a cyclical manner according to the transmission and reception sequence, such that all antennas of the goods are simultaneously in a transmission state or simultaneously in a reception state at the same time.

[0011] According to one aspect of the invention, the antenna operates in LC resonant circuit mode, where the LC resonant frequency is the system carrier frequency.

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

[0013] According to one aspect of the present invention, the receiving module includes a bandpass filter and a shaping circuit, wherein the wireless signal received by the antenna first passes through the bandpass filter and then through the shaping circuit.

[0014] According to one aspect of the present invention, the bandpass 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 invention, the controller decodes the input signal data according to a pre-defined communication protocol and restores the device identifier, thereby confirming 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 stream of N bytes of data. The longer the device identifier, the more valid information it expresses; the shorter the device identifier, the faster it can be identified.

[0017] According to one aspect of the invention, the frequency range of the modulation signal is between 10 kHz and 100 kHz, and the frequency range of the system carrier frequency is between 300 kHz and 1000 kHz.

[0018] According to one aspect of the invention, the time during which all antennas of the goods are simultaneously in the receiving state is much longer than the time during which they are simultaneously in the transmitting state.

[0019] The advantages of this invention are as follows: Antennas are deployed on each side of the target item, which is stacked on top of each other. The antennas are connected to a controller, and a transmitting module and a receiving module are provided between the antennas and the controller. When transmitting a signal, the transmitting module modulates the signal onto the antenna's system carrier frequency, 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 signal to the controller. The controller decodes the received information. The target items are stacked in an array. The antennas work alternately and cyclically according to the transmission and reception sequence, transmitting and receiving information through the same antenna. The construction is relatively simple and the cost is low. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 is a schematic diagram of the antenna deployment method inside the target item of a cargo array positioning device according to the present invention.

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

[0023] Figure 3 is a hardware circuit connection block diagram of a cargo array positioning device according to the present invention.

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

[0025] Figure 5 is a schematic diagram of the working timing of a cargo array positioning device according to the present invention;

[0026] Figure 6 is a schematic diagram of the message content sent by a cargo array positioning device according to the present invention.

[0027] Explanation of reference numerals in the attached figures:

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

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

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

[0031] As shown in Figure 1, functional modules are deployed on the four sides of the target object, 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 transmitting module, a receiving module, and an antenna.

[0032] As shown in Figure 2, the target items are stacked in a 2x2 matrix, with the surfaces of adjacent target items in contact with each other. The antennas on each surface transmit and receive wireless signals. The antennas on adjacent sides of the target items interact to form an electromagnetic field, thereby enabling wireless communication.

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

[0034] As shown in Figure 4, the modulation circuit 23, power amplifier 24, and antenna are connected in sequence. The antenna is then connected in sequence to the bandpass filter and shaping circuit. The first transmitting module 6, the second transmitting module 9, the third transmitting module 12, and the fourth transmitting module 15 modulate the modulation signal fm onto the system carrier frequency fc through the modulation circuit 23. The modulated signal is amplified by the power amplifier 24 and then output to the corresponding antenna. The signal picked up by the antenna is transmitted to the bandpass filter 25, which filters out invalid signals and amplifies the signal. The amplified signal is then 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 26 kHz, and the frequency of the carrier signal fc is 423 kHz.

[0035] As shown in Figure 5, TX represents the data transmission time slot, including a first transmission time 18 and a second transmission time 20, and RX represents the data reception time slot, including a first reception time 19 and a second reception time 21. In this invention, the first antenna 5, the second antenna 8, the third antenna 11, and the fourth antenna 14 corresponding to the target item operate in a transmission and reception sequence. During the data transmission time slot, all four antennas are simultaneously in the transmission state; during the data reception time slot, all four antennas are simultaneously in the reception state. Since the target items operate asynchronously, to ensure system reliability, 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. During system operation, the data transmission time slot and the data reception time slot alternate between each other.

[0036] As shown in Figure 6, the device identifier 22 is a string of N bytes of data, and all target items are configured with a unique device identifier 22. The longer the device identifier 22, the more effective information it conveys; the shorter the device identifier 22, the faster the recognition speed. In this embodiment, considering both the amount of information and the recognition speed, the length of the device identifier 22 is set to 4 bytes.

[0037] During system operation, each target item transmits its own device identifier 22 via its antenna in real time during the TX data transmission time slot. During the RX data reception time slot, it receives and parses the device identifiers 22 transmitted by neighboring target items. In this way, each target item can obtain the device identifiers 22 of its surrounding target items, thus forming location information within the matrix space.

[0038] The advantages of this invention are as follows: By deploying antennas on each side of the target item, which is stacked in a 2x2 matrix, and connecting the antennas to a controller, a transmitting module and a receiving module are provided between the antennas and the controller. When transmitting a signal, the transmitting module modulates the 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. The antennas work alternately in a cyclical manner according to the transmission and reception sequence and transmit and receive information through the same antenna. The target items are stacked in an array and transmit and receive information through the same antenna, resulting in a relatively simple structure and low cost.

[0039] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

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