Passive label positioning device, system and method and motion trail positioning method

Abstract

The invention provides a passive label positioning device, system and method and a motion trail positioning method. The positioning device comprises a passive label; an array antenna which comprises a first-direction antenna array, a second-direction antenna array, a third-direction antenna array, a fourth-direction antenna array and a fifth-direction antenna array, a second direction antenna array which is used for acquiring the incident angle of the passive tag in the second direction. According to the invention, only one positioning array antenna is used to complete the positioning of the passive tag in the coverage field, and there is no need to place a plurality of reader-writers and reference tags. Therefore, even if the vehicle pasted with the passive label is in a high-speed driving state, the positioning device can still accurately collect label information and calculate position information of the vehicle, and meanwhile the driving track of the vehicle can be obtained.

Description

technical field [0001] The invention relates to the technical field of positioning and identification, in particular to a passive tag positioning device, a system, a positioning method and a motion track positioning method. Background technique [0002] Positioning technology is an important derivative function of UHF RFID. At present, RFID-based positioning technology is divided into the following types: 1) Based on received signal strength (RSSI); 2) Based on the angle of arrival (AOA) of the propagated signal; 3) Based on the phase of arrival (POA) of the propagated signal. [0003] In a complex traffic environment, the received signal strength (RSSI) is greatly disturbed by the environment, and the positioning result will have a large error; the positioning method based on POA needs to obtain phase information accurately, which has high requirements for the receiver, and the phase has Periodicity, the phase of the electronic tag will appear periodic during the driving p...

AI Technical Summary

Problems solved by technology

[0003] In a complex traffic environment, the received signal strength (RSSI) is greatly disturbed by the environment, and the positioning result will have a large error; the positioning method based on POA needs to obtain phase information accurately, which has high requirements for the receiver, and the phase has Periodicity, the phase of the electronic tag will appear periodic during the driving process of the vehicle, resulting in multi-valued positioning results; and AOA-based positioning methods generally only need array antennas, and the accuracy is relatively high, but the traditional AOA Positioning technology generally only has horizontal positioning

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