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RFID indoors positioning system

An indoor positioning and RFID tag technology, applied in the field of positioning systems, can solve the problems of limited number of card reader antennas, high energy consumption, high implementation costs, etc., to reduce the possibility of position equivalence and improve the effect of positioning accuracy

Inactive Publication Date: 2009-10-07
SHANGHAI JIAO TONG UNIV
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  • Description
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AI Technical Summary

Problems solved by technology

However, this method uses a large number of antennas, and a large number of antennas are kept powered on during operation, which consumes a lot of energy, and the number of antennas connected to each card reader is limited, so it is necessary to increase the number of readers to a certain extent, thereby reducing the implementation cost. is too big

Method used

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Embodiment Construction

[0020] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented under the premise of the technical solution of the present invention, and detailed implementation methods and processes are provided, but the protection scope of the present invention is not limited to the following implementations example.

[0021] This embodiment includes that the present invention includes an RFID reader-writer, an RFID reader-writer antenna, an RFID tag, a data signal processing module and a positioning analysis module.

[0022] In this embodiment, four short-range RFID readers are selected, and the maximum reading and writing distance is 5-7 centimeters. The side length of the RFID reader antenna is 10cm, and the RFID reader antenna is assembled into a large square with a side length of 20cm. Such as figure 1 The upper right is RFID reader I, the upper left is RFID reader II, the lower left is RFID r...

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Abstract

The invention relates to a RFID indoors positioning system belonging to the telecommunication technology field. The working process of the system in the invention comprises: arranging the RFID labels, which is used as positioning reference points, on the robot motion plane according to regular triangle inlaying mode; using a single chip microcomputer to control four RFID reader-writer to read information in the RFID labels; performing data processing, and positioning analysis provided in the invention to obtain the positioning information and positioning precision of the robot; computing and analyzing the theory position and positioning precision of the robot under constraints of different positioning information; evaluating the area made up by all the possible position of the equivalent positioning points under different conditions; and obtaining the theory position and the positioning precision of the robot according to the area. The scheme has the advantages of low cost, equipment generality, easily purchased, simple positioning principle and easily realized; is influenced by environment in low degree; is especially suitable for the indoors environment or poor light working environment, and has a wide application prospect.

Description

technical field [0001] The present invention relates to a positioning system in the technical field of telecommunications, in particular to an RFID (Radio Frequency Identification, Radio Frequency Identification) indoor positioning system. Background technique [0002] RFID is an automatic identification technology that began to emerge in the 1990s, that is, to identify targets through non-contact two-way data communication through unlimited radio frequency. RFID technology can complete information input and processing without direct contact, without optical visualization, and without manual intervention. In addition, with the advancement of technology, the reading and writing speed of RFID readers and the ability to process signals have improved, and the application of RFID radio frequency identification technology It has broad prospects for mobile robot positioning. [0003] In addition to RFID technology, there are many different technologies that can be applied to indoo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/74G06K17/00
CPCG01S5/02955
Inventor 冷春涛曹其新王泷皓夏若冰陈其洲
Owner SHANGHAI JIAO TONG UNIV
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