Radio frequency indoor positioning method based on virtual tag algorithm

Abstract

The invention discloses a radio frequency indoor positioning method based on a virtual tag algorithm. A reference tag is fixed at a proper position in a positioning area; the coordinate of the proper position is measured in a relatively easy way; the signal intensity of the reference tag is read through an arranged RFID (Radio Frequency Identification Device) reader / writer every a section of time so as to adapt to the influence of the environment factor variation on the positioning error; and the positioned tag is attached to a target to be positioned; estimating the position of the tag in the space through the positioning tag signal received by the RFID reader / writer, wherein the method is implemented according to the following steps of: first, estimating an environment variable, wherein the estimation includes path consumption index estimation and normal distribution standard deviation estimation; and then constructing a virtual reference tag; and finally, realizing the positioning algorithm according to the virtual reference tag. By using the indoor positioning method disclosed by the invention, the problem of radio frequency signal interference brought by the setting of the high-density reference tag in the prior art is overcome, and flexible layout of the reference tag is obtained; meanwhile, the range of the positioning area is expanded and the indoor positioning precision is improved.

Description

technical field [0001] The invention belongs to the technical field of radio frequency identification, and relates to a wireless radio frequency indoor positioning method based on a virtual label algorithm. Background technique [0002] Radio Frequency Identification (RFID, Radio Frequency Identification) is a technology that uses radio frequency to conduct non-contact two-way communication through electromagnetic fields to achieve the purpose of identifying targets and realize non-contact automatic data exchange. At present, radio frequency identification technology has been widely used in production, logistics, transportation and other application fields, and has broad application prospects in unmanned automatic management fields such as location tracking and automatic scanning. Especially as the concept of "Internet of Things" (IoT, Internet of Things) has attracted widespread attention in the industry, as an advanced productivity, the wide application of RFID technology ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a wireless radio frequency indoor positioning method based on a virtual reference tag algorithm, which overcomes the radio frequency signal interference problem caused by setting high-density reference tags in the prior art, and has a flexible layout of reference tags, while expanding the scope of the positioning area. Improved indoor positioning accuracy

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