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Positioning method for detecting fixed radio frequency identification (RFID) electronic tag by utilizing movable reader

A technology of electronic tags and readers, which is applied in the field of positioning by using mobile readers to detect fixed RFID electronic tags. It can solve problems such as poor signal reception, signal loss of lock, and errors in GPS/Beidou satellite positioning, etc., to achieve accurate positioning. High precision, low cost, high comprehensive effect can be achieved

Inactive Publication Date: 2013-01-09
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the positioning in the city is mainly realized by the GPS / Beidou satellite positioning system, but in the urban "canyon" area full of tall buildings, the GPS / Beidou satellite positioning is prone to errors
GPS / Beidou satellite signal error sources are mainly caused by the following reasons: ① multipath effect: the reflection of GPS signals by buildings; The signal reception effect is poor; ③ signal loss caused by tunnels and underground parking plants, etc.

Method used

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  • Positioning method for detecting fixed radio frequency identification (RFID) electronic tag by utilizing movable reader
  • Positioning method for detecting fixed radio frequency identification (RFID) electronic tag by utilizing movable reader
  • Positioning method for detecting fixed radio frequency identification (RFID) electronic tag by utilizing movable reader

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Embodiment 1

[0021] The present invention is applied to a positioning method in an on-vehicle system in an automobile. The positioning steps are as follows:

[0022] (1) Install RFID electronic tags and mobile readers: lay RFID electronic tags as location anchor nodes according to the positioning accuracy, and install RFID mobile readers on the car's vehicle system;

[0023] (2) Establishment and initial setting of the database: establish a geographic information database to store the ID number of each RFID electronic tag and its corresponding actual geographic location;

[0024] (3) Mobile detection process: The RFID reader in the vehicle system periodically sends out radio frequency signals. When the car arrives near a marked point where the RFID electronic tag is installed, the RFID reader sends out radio frequency information that is detected by the RFID electronic tag in the place. Receive and return the radio frequency signal with ID electronic code;

[0025] (4) Information proces...

Embodiment 2

[0040] The present invention is applied to a method for positioning people indoors. The positioning steps are as follows:

[0041] (1) Install RFID electronic tags and mobile readers: Lay RFID electronic tags as location anchor nodes according to the positioning accuracy, and users carry RFID mobile readers;

[0042] (2) Establishment and initial setting of the database: establish a room information database to store the ID number of the RFID electronic tag in each room and its corresponding room number;

[0043] (3) Mobile detection process: The RFID reader carried by the user periodically sends out radio frequency signals. When the user arrives near a room where the RFID electronic tag is installed, the radio frequency information sent by the RFID reader is detected by the RFID electronic tag in the place. Receive and return the radio frequency signal with ID electronic code;

[0044] (4) Information processing process: use the RFID reader carried by the person to obtain t...

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Abstract

The invention discloses a positioning method for wireless communication, in particular a positioning method for detecting a fixed radio frequency identification (RFID) electronic tag by utilizing a movable reader. The positioning method comprises the following steps of: finishing an initial RFID reader and electronic tag mounting process; establishing a road information database, and setting a corresponding electronic code; transmitting a radio frequency signal, and receiving a signal returned by the electronic tag by using the movable reader; and transmitting an ID number of the electronic tag and signal receiving time to a processing unit, and processing information to obtain related position information, thereby fulfilling the aims of real-time positioning and navigation. The method is high in positioning accuracy, and the electronic tag is low in cost and small in size, so that the method is high in comprehensive implementability and widely applicable to the navigation positioning of a vehicular system and indoor three-dimensional positioning; and the method also can be used as a useful addition to the conventional global positioning system (GPS) / Beidou satellite positioning system to compensate positioning errors caused by factors such as shadow and multi-path during the city positioning of the conventional GPS / Beidou satellite positioning system.

Description

technical field [0001] The invention discloses a positioning method for wireless communication, in particular to a method for realizing positioning by using a mobile reader to detect a fixed RFID electronic tag. Background technique [0002] RFID (Radio Frequency IDentification) technology, also known as electronic tags and radio frequency identification, is a communication technology that can identify specific targets through radio signals and read and write related data without the need to establish a mechanical system or optical contacts. [0003] Based on the unique identification characteristics of RFID tags to objects, people have triggered an upsurge of research on the application of RFID technology. One research hotspot is logistics and physical Internet, and another applied research hotspot is spatial positioning and tracking RFID positioning. The tracking system mainly uses the unique identification characteristics of the tag to the object, and measures the spati...

Claims

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Application Information

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IPC IPC(8): G06K7/00
Inventor 叶芝慧吕珺李文峰王健赵康僆
Owner NANJING UNIV
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