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Fine grain multi-target passive positioning method on the basis of RFID

A positioning method and passive technology, applied in the field of wireless positioning, can solve the problems of inability to meet the requirements, the monitoring area cannot achieve multi-target positioning, and the equipment is not cheap.

Active Publication Date: 2016-05-04
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, these methods can only point out the approximate location of the target, but cannot accurately calculate the target location, and cannot meet people's needs.
In addition, the existing positioning methods mainly use RSSI technology, but RSSI technology will be restrained by multipath due to the influence of antenna gain, so it can only achieve coarse-grained positioning
[0005] In summary, the existing passive positioning methods generally have the following defects: 1) multi-target positioning cannot be achieved in the monitoring area; 2) the equipment is not cheap; 3) the accuracy cannot meet people's needs

Method used

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  • Fine grain multi-target passive positioning method on the basis of RFID
  • Fine grain multi-target passive positioning method on the basis of RFID
  • Fine grain multi-target passive positioning method on the basis of RFID

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0151] Two common RFID systems were used to complete the test in the laboratory of Northwestern University's School of Information Science and Technology. Multiple tables, shelves, desktop computers, etc. were placed in the laboratory to form a complex indoor environment. In this experiment, there are a total of three different experiments to verify the effectiveness, robustness and advantages of the present invention compared with other methods. Each experiment has a different experimental scenario and is completed by 7 volunteers for a total duration of In 14 hours, 1,054,400 pieces of data were collected.

[0152] This embodiment adopts the first scene of Experiment I. In scene one, 25 RFID tags form a 5*5 tag matrix, and the interval between each pair of tags is 1.2m, thereby forming a monitoring area of ​​480cm*480cm. Two RFID readers and their corresponding antenna arrays are placed on adjacent sides of the monitoring area. In this scenario, there are a total of 4 volun...

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Abstract

The present invention discloses a fine-grain multi-target passive positioning method on the basis of a RFID. The method provided by the invention is able to take the disturbance of multipath information as fingerprint information, and a multi-target positioning method in the prior art remove multipath or neglect multipath information, so that the method provided by the invention is able to realize the calculation of fine grain position, and other methods can only indicate the substantial position of an object. The method provided by the invention is able to accurately perform fine grain multi-target positioning and fill up defects of the multi-target positioning algorithm in the aspect of positioning precision, and has good dynamic adaptability of the environment and low economic cost.

Description

technical field [0001] The invention belongs to the field of wireless positioning, and relates to a fine-grained multi-target positioning method, in particular to an RFID-based fine-grained multi-target passive positioning method. Background technique [0002] In many application scenarios today, such as anti-intrusion detection, shopping mall navigation, elderly fall detection, etc., obtaining the location information of the target is the most basic content, which has attracted a large number of scholars to carry out related research work in the past 20 years. Among them, passive (without carrying other devices) positioning methods have always played an important role in anti-intrusion applications, especially for multi-target positioning methods. [0003] Existing passive positioning methods use sensor nodes, infrared devices, advanced cameras, and even specialized equipment, which are expensive and difficult to meet the needs of large-scale deployment. At present, RFID p...

Claims

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Application Information

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IPC IPC(8): G01S5/02
CPCG01S5/0215G01S5/0252
Inventor 谢彬彬张立超李荔垚陈晓江房鼎益邢天璋汤战勇王安文王薇刘晨
Owner NORTHWEST UNIV
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