Landmark system based on radio frequency identification

Abstract

A landmark system based on radio frequency identification effectively solves the problems of high cost and poor compatibility, and comprises a landmark tag, a reader and a manager, the landmark tag stores position information of a location, the landmark tag comprises a plurality of inductance coils, each inductance coil is provided with a tag chip and at least one planar slot capacitor, and the planar slot capacitor is connected with the reader. The label chip is arranged on the inductance coil, the reader is arranged on the inductance coil and is not at any position of the label chip, the first dipole antenna is connected to the outer side of the inductance coil, the reader comprises a second dipole antenna, and the reader transmits a first signal to the landmark label through the second dipole antenna so as to provide a working power supply for the label chip. The reader is used for reading the location information of the location stored in the landmark tag; the communication mode of the landmark label is compatible with a wireless local area network protocol, and the reader forms a measurement point, measures a second signal of the received landmark label, and forwards second signal data to the management server.

Description

Technical Field

[0001] The invention belongs to the technical field of wireless radio frequency identification, and in particular relates to a landmark system based on wireless radio frequency identification. Background Art

[0002] With the development of microelectronics, computers and network technology, RFID is a non-contact automatic identification technology that automatically identifies the target object and obtains relevant data through radio frequency signals. The identification work does not require human intervention and can work in various harsh environments. RFID technology can identify high-speed moving objects and can identify multiple tags at the same time. It is quick and convenient to operate, and can realize automatic identification of various objects, equipment, vehicles and personnel in different states (moving, stationary), thereby realizing automatic management of targets.

[0003] In the past, systems based on RFID technology, such as EPC (Electronic Product Code) networks, all adopted a model in which fixed readers were installed in some important commodity distribution centers and RFID tags were attached to items. This model is widely used in commodity logistics, but in other application scenarios such as personnel positioning and vehicle navigation, in order to make the positioning accuracy meet the requirements of system practicality, the deployment density of readers must be increased. Compared with RFID tags, the cost of deploying such dense readers is very high. At the same time, many different frequency bands are used, there is no unified standard, and the product compatibility of each manufacturer is poor. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a landmark system based on wireless radio frequency identification, which effectively solves the problems of high cost and poor compatibility.

[0005] The technical solution to the technical problem is: including

[0006] Landmark tag; the landmark tag is a wireless radio frequency tag, the location information of the location is stored in the landmark tag, the landmark tag includes a plurality of inductors, a tag chip is arranged on the inductor, at least one planar gap capacitor is arranged on the inductor and at any position other than the tag chip, and the planar gap capacitor has overlapping parallel lines; and a first dipole antenna is connected to the outside of the inductor; wherein the tag chip, the inductor and the planar gap capacitor are matched with each other to provide power coupling of the wireless radio frequency identification tag;

[0007] The reader includes a second dipole antenna, and the reader transmits a first signal to the landmark tag through the second dipole antenna to provide a working power supply to the tag chip, and the reader is used to read the location information of the location stored in the landmark tag;

[0008] Management server; the communication method of the landmark tag is compatible with the wireless local area network protocol, the reader constitutes a measurement point, measures the second signal received from the landmark tag, and forwards the second signal data to the management server. The management server displays the location information stored in the landmark tag through software.

[0009] Preferably, the landmark tag receives a first signal through a first dipole antenna, the landmark tag converts the first signal into an induced current, the landmark tag boosts the induced current and provides it to a tag chip, the tag chip transmits the location information of the stored location through a second signal emitted by the first dipole antenna to a reader, and the reader processes the location information of the location stored in the landmark tag and transmits it to a management server.

[0010] Preferably, the communication mode of the landmark tag includes physical layer and media access control functions, and is compatible with the IEEE802.11 protocol of the wireless local area network.

[0011] Preferably, the reader includes a control unit and a radio frequency unit, the control unit is bidirectionally connected to the communication unit, the control unit establishes bidirectional communication with the management server via a communication interface, the radio frequency unit is bidirectionally connected to the control unit, the radio frequency unit converts the current signal output by the control unit into a first signal and sends it to the landmark tag, or receives the location information stored in the location transmitted by the landmark tag and converts it into a second signal and transmits it to the control unit.

[0012] Preferably, the management server is a wireless local area network terminal device, a mobile phone, a PDA or a computer.

[0013] Preferably, there are more than two planar gap capacitors, and the planar gap capacitors have parallel lines that overlap in the horizontal direction or the vertical direction.

[0014] The present invention has the following advantages over traditional equipment: 1) It can not only ensure the communication distance between the RFID reader and the landmark tag, but also further improve the stability of the RFID system and the recognition speed of the RFID reader; 2) It uses the standard 802.11 LAN communication method, simplifies the network structure, effectively reduces the installation and operation costs of the reader and the system, has good compatibility, unified management, and convenient maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the implementation of the system of the present invention. DETAILED DESCRIPTION

[0016] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0017] Depend on Figure 1 A landmark system based on wireless radio frequency identification is provided, comprising a landmark tag; the landmark tag is a wireless radio frequency tag, the location information of the location is stored in the landmark tag, the landmark tag comprises a plurality of inductors, a tag chip is arranged on the inductor, at least one planar gap capacitor is arranged on the inductor and at any position other than the tag chip, and the planar gap capacitor has overlapping parallel lines; and a first dipole antenna is connected to the outside of the inductor; wherein the tag chip, the inductor and the planar gap capacitor are matched with each other to provide power coupling of the wireless radio frequency identification tag;

[0018] The reader includes a second dipole antenna, and the reader transmits a first signal to the landmark tag through the second dipole antenna to provide a working power supply to the tag chip, and the reader is used to read the location information of the location stored in the landmark tag;

[0019] Management server; the communication method of the landmark tag is compatible with the wireless local area network protocol, the reader constitutes a measurement point, measures the second signal received from the landmark tag, and forwards the second signal data to the management server. The management server displays the location information stored in the landmark tag through software.

[0020] When in use, the management server sends a control instruction to the reader. After receiving the control instruction and responding to the control instruction, the reader writer transmits a first signal (the first signal is a scanning signal) to the landmark tag through the second dipole antenna. The first dipole antenna receives the first signal and converts the first signal into an induced current and transmits it to the radio frequency front-end circuit. The radio frequency front-end circuit converts the induced current into a digital signal, and then processes the digital signal through the logic control circuit and transmits it to the memory. The memory makes a corresponding reply according to the input digital signal carrying the scanning information. The memory sends the stored product information to the radio frequency front-end circuit through the logic control circuit, and then feeds back to the reader through the second signal of the first dipole antenna. The reader processes the location information of the location and transmits it to the management server.

[0021] The reader includes a control unit and a radio frequency unit. The control unit is connected to the communication unit in a two-way communication manner. The control unit establishes a two-way communication with the management server through a communication interface. The radio frequency unit is connected to the control unit in a two-way communication manner. The radio frequency unit converts the current signal output by the control unit into a first signal and sends it to the landmark tag, or receives the location information stored in the location transmitted by the landmark tag and converts it into a second signal and transmits it to the control unit. The communication unit includes an RS-232 communication interface, or an RS-485 communication interface, or a Bluetooth communication interface, or a GPRS communication interface, or a USB communication interface.

[0022] The two planar slot capacitors of the landmark tag have parallel lines that overlap in the horizontal direction, wherein each planar slot capacitor has multiple overlapping parallel lines, and each planar slot capacitor has an odd number of overlapping parallel lines, but the number of overlapping parallel lines is not limited to this, and the number can also be an even number, or a series arrangement and combination of an odd number and an even number respectively. It should be noted that the horizontal or vertical direction design of the parallel lines can be adjusted or customized according to the different sizes of the wireless radio frequency identification tags, and the design direction or tilt angle is more compatible with the wireless radio frequency identification tag design.

[0023] The communication method of the landmark tag includes the physical layer and media access control (MAC) functions, which are compatible with the IEEE 802.11 protocol of the wireless LAN. The management server can be a wireless LAN terminal device composed of a Wi-Fi mobile phone or a PDA. It uses the standard 802.11 LAN communication method, simplifies the network structure, and effectively reduces the installation and operation costs of the reader and the system. The system has good compatibility and is easy to maintain and upgrade later.

[0024] This embodiment does not impose any formal limitation on the shape, material, structure, etc. of the present invention. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A landmark system based on radio frequency identification, characterized in that: include Landmark tag; the landmark tag is a wireless radio frequency tag, which stores the location information of the location, and includes a plurality of inductors, on which a tag chip is arranged, and at least one planar gap capacitor, which is arranged on the inductor and not at any position of the tag chip, and the planar gap capacitor has overlapping parallel lines; and a first dipole antenna connected to the outside of the inductor coil; wherein the tag chip, the inductor coil and the planar gap capacitor are matched with each other to provide power coupling of the wireless radio frequency identification tag; The reader includes a second dipole antenna, and the reader transmits a first signal to the landmark tag through the second dipole antenna to provide a working power supply to the tag chip, and the reader is used to read the location information of the location stored in the landmark tag; Manage servers; The communication method of the landmark tag is compatible with the wireless local area network protocol. The reader constitutes a measurement point, measures the second signal received from the landmark tag, and forwards the second signal data to the management server. The management server displays the location information stored in the landmark tag through software.

2. A landmark system based on wireless radio frequency identification according to claim 1, characterized in that: The landmark tag receives a first signal through a first dipole antenna, converts the first signal into an induced current, boosts the induced current and provides it to a tag chip, the tag chip transmits the location information of the stored location to a reader through a second signal emitted by the first dipole antenna, and the reader processes the location information of the location stored in the landmark tag and transmits it to a management server.

3. A landmark system based on wireless radio frequency identification according to claim 1, characterized in that: The communication mode of the landmark tag includes physical layer and medium access control functions, and is compatible with the IEEE802.11 protocol of the wireless local area network.

4. The landmark system based on wireless radio frequency identification according to claim 1, characterized in that: The reader includes a control unit and a radio frequency unit. The control unit is bidirectionally connected to the communication unit. The control unit establishes bidirectional communication with the management server through a communication interface. The radio frequency unit is bidirectionally connected to the control unit. The radio frequency unit converts the current signal output by the control unit into a first signal and sends it to the landmark tag, or receives the location information stored in the location transmitted by the landmark tag and converts it into a second signal and transmits it to the control unit.

5. The landmark system based on wireless radio frequency identification according to claim 1, characterized in that: The management server is a wireless LAN terminal device, a mobile phone, a PDA or a computer.

6. The landmark system based on wireless radio frequency identification according to claim 1, characterized in that: There are more than two planar gap capacitors, and the planar gap capacitors have parallel lines that overlap in the horizontal direction or the vertical direction.

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