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Double-loop switching layer antenna device based on RFID

An antenna device and switching layer technology, which is applied in the field of radio frequency identification systems for books, can solve the problems of antenna installation complexity and antenna cost increase, affecting the overall appearance of the bookshelf, and reducing the permeability of the bookshelf, so as to reduce the installation complexity and cost , improve the success rate of reading, increase the effect of convenience

Inactive Publication Date: 2019-03-01
WEIHAI BEIYANG PHOTOELECTRIC INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the management of the library consumes a lot of manpower. Due to the large number of books, the work of book classification and book inventory is time-consuming and laborious. Therefore, RFID smart bookshelves came into being.
At present, most smart bookshelf antennas on the market are vertical, and multiple sets of antennas need to be placed on each shelf to achieve stable reading. Due to the large number of antennas, the complexity of antenna installation and the cost of antennas will increase accordingly.
At the same time, the vertical antenna needs to add metal shielding on the front, rear, left, and right layers to prevent cross-reading, resulting in a decrease in the permeability of the bookshelf and affecting the overall appearance of the bookshelf

Method used

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  • Double-loop switching layer antenna device based on RFID
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  • Double-loop switching layer antenna device based on RFID

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Effect test

Embodiment 1

[0024] Such as figure 1 As shown, the present invention proposes a two-way switching antenna device, which includes: a power module 1, a radio frequency reader 2, a two-way matching board 3, and an antenna array.

[0025] The antenna array adopts a two-way form, which is composed of two zigzag antennas overlapping and complementary, so that the blind areas of the two antennas cancel each other out, greatly increasing the reading stability of the tag, and effectively improving the reading success rate.

[0026] The input terminal of the radio frequency reader 2 is connected to the power module, and is used to generate radio frequency signals and antenna selection signals, and these signals are sent to the dual matching board 3 through radio frequency lines.

[0027] The two-way matching board 3, the input end is connected to the radio frequency reader, and the output end is connected to the corresponding antenna, which is used to perform impedance matching on the corresponding ...

Embodiment 2

[0031] Such as figure 2 As shown, the antenna array of the present invention is in the form of a laminate, and since the tag is perpendicular to the antenna, the traditional rectangular antenna cannot perform stable reading. In order to ensure that the plate-shaped antenna can read book labels, the present invention adopts a zigzag antenna, widening the vertical side and narrowing the horizontal side of the zigzag antenna, so that the magnetic field radiated by the antenna in the direction perpendicular to the label is the largest. Since the two vertical sides of the zigzag antenna are in opposite directions, the magnetic fields in the middle of the two sides cancel each other and an inevitable dead zone appears. Therefore, a two-way antenna is required so that the dead zones of the two antennas cancel each other out.

[0032] The two-way antenna is in a zigzag shape, and the two antennas overlap and complement each other with a phase difference of 90°.

[0033] The antenna ...

Embodiment 3

[0035] Such as image 3 As shown, the reader / writer of the present invention is composed of a radio frequency output circuit 6, a positive pressure circuit 7, a negative pressure circuit 8, and a radio frequency output interface 9, wherein the radio frequency output circuit 6 is used to complete the processing, amplification and matching functions of radio frequency signals to ensure The radio frequency signal has sufficient output power, and the positive voltage circuit 5 and the negative voltage circuit 8 are used to provide antenna selection signals. When the reader / writer is working, the AC radio frequency signal and the DC antenna selection signal are superimposed, and transmitted to the dual-channel matching board through the radio frequency output interface 9 and the radio frequency line.

[0036]The reader superimposes the radio frequency signal and the antenna selection signal, and outputs it through a radio frequency line, so that a single radio frequency line can tr...

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Abstract

The invention relates to an RFID-based double-loop switching layer plate antenna device provided with a power supply module, radio frequency reader / writer, a dual-way match board and antenna array. The radio frequency reader / writer is connected with the power supply module, the RF signal output end of the RF reader / writer is connected with the input end of the dual matching board through the RF line, the output end of the two-way matching board is connected with the antenna array, characterized in that the antenna array consists of two sawtooth antennas overlapping and complementing each other, that is, the two sawtooth antennas are placed side by side and face each other, Compared with the prior art, the number of antennas is reduced, the cost is reduced, and the antenna is changed from aplurality of vertical antennas to a single layer board type antenna, which is simple in installation and strong in retrofitting; the working mode of switching two antennas is adopted, and the antennas are complementary before the two antennas so as to eliminate the blind area, thereby effectively reducing the leakage reading rate.

Description

Technical field: [0001] The invention relates to a radio frequency identification (RFID, Radio Frequency Identification) system for books, in particular to an RFID-based double-circle switching laminate antenna device capable of realizing book labels identified by a laminate antenna and effectively saving costs. Background technique: [0002] RFID (Radio Frequency Identification), also known as radio frequency identification, is a non-contact communication technology that achieves information transmission through electromagnetic fields. In the current radio frequency identification field, its typical system generally includes read-write modules, antennas and labels. The read-write module is used to transmit and receive radio frequency signals, and the antenna is used to transmit information between the read-write module and the tags. Each tag has a unique electronic code and is attached to the identified object. [0003] At present, the management of the library consumes a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/077
CPCG06K19/07722G06K19/07758G06K19/07773
Inventor 李泽民赵俊栋曹峰高明超任永涛郭辰明刘涛
Owner WEIHAI BEIYANG PHOTOELECTRIC INFORMATION TECH
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