A method for indoor space positioning based on flexible RFID passive tags

Abstract

The invention relates to an indoor space positioning method based on a flexible RFID passive tag. After a to-be tested object with an ultrasonic sensor and the flexible passive RFID passive tag enters positioning space, when the to-be tested object moves in the space, the height of the to-be tested object is firstly acquired through the ultrasonic sensor, then signal intensity from the flexible passive RFID passive tag to all antennae is acquired through a positioning terminal, then a reference tag positioning database is retrieved, and position coordinates of the object to be positioned can be given. The indoor space positioning method based on the flexible passive RFID passive tag has the advantages of being high in positioning precision, low in maintenance cost and easy to implement.

Description

technical field [0001] The invention belongs to the technical field of wireless space positioning, and in particular relates to an indoor space positioning method based on a flexible RFID passive tag. Background technique [0002] In recent years, with the rapid development of wireless technology and mobile communication technology, indoor positioning technology has attracted more and more attention. Indoor positioning technologies such as infrared, ultrasonic, bluetooth, and laser are either complex in system, expensive in cost, or unsatisfactory in positioning accuracy. The radio frequency identification (RFID) technology has become the preferred technology in the field of indoor positioning because of its low cost, non-contact, non-line-of-sight and other advantages, and is recognized by the industry as one of the most promising application technologies in this century. . In addition, due to the complex and changeable indoor environment, the interference of multipath pr...

AI Technical Summary

Problems solved by technology

[0005] The time positioning method based on distance measurement and positioning requires more accurate time synchronization between the sending and receiving parties, which is difficult for RFID systems. If the synchronization clock accuracy is to be improved, the cost will increase accordingly

[0006] The present invention uses signal strength information for positioning. In the patent application number CN201210004597, multiple readers are used, which is costly. The above is also limited to positioning on a two-dimensional plane, and cannot solve positioning in a three-dimensional space.