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A RFID indoor positioning fingerprint library updating system and method

An indoor positioning and updating method technology, applied in database update, positioning, neural learning method and other directions, can solve the problems of high time and labor cost, inaccurate fingerprint update, low efficiency of fingerprint database, etc., to improve accuracy and reduce work intensity Effect

Active Publication Date: 2020-12-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the deficiencies of the prior art, the present disclosure provides an RFID indoor positioning fingerprint library update system and method, which solves the problems of low efficiency, high time and labor costs, and inaccurate fingerprint update in the prior art when updating the fingerprint library. , realizing the accurate and rapid update of the RFID indoor positioning fingerprint library

Method used

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  • A RFID indoor positioning fingerprint library updating system and method
  • A RFID indoor positioning fingerprint library updating system and method
  • A RFID indoor positioning fingerprint library updating system and method

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Embodiment 1

[0057] Such as Figure 1-2 As shown, Embodiment 1 of the present disclosure provides an RFID indoor positioning fingerprint database update system, in figure 1 In this method, any fixed point of the indoor positioning rectangle is used as the origin, and the two adjacent sides of the origin are used as the X-axis and Y-axis to establish a plane Cartesian coordinate system.

[0058] RFID readers R1, R2, R3, and R4 can collect the signal strength values ​​of anchor tags AT and target tags DT in real time, and transmit the signal strength values ​​to the STM32 microcontroller module in JSON format through the RS232 serial port. In the fingerprint library initialization stage, the signal strength values ​​of the anchor tags AT and the target tag DT are collected at the same time, and the axis coordinate values ​​of the anchor tags AT and the target tag DT are measured at the same time as the initial fingerprint library. In the real-time update stage of the fingerprint library, On...

Embodiment 2

[0063] Such as image 3 As shown, Embodiment 2 of the present disclosure provides a method for updating the RFID indoor positioning fingerprint database, and the steps are as follows:

[0064] Step 1: Establish a plane Cartesian coordinate system based on the rectangular space of the positioning area, arrange the anchor tags and target tags in the positioning area, set the anchor tags in the offline fingerprint collection and update the online fingerprint database, and keep the coordinates in the positioning area unchanged, and the target tags only In the offline stage, set, measure and store the planar rectangular coordinate values ​​of the anchor tag and the target tag. The specific method is:

[0065] Establish a plane Cartesian coordinate system based on the rectangular space of the positioning area, take any fixed point as the origin O, and take the two adjacent sides of the origin as the X and Y axes. Take the set of RFID anchor signal strength value labels in the posit...

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Abstract

The invention provides an RFID indoor positioning fingerprint database updating system and method. According to the method, actual coordinates, Euclidean distances and X-axis and Y-axis mapping coordinate difference data of each anchor label and each target label are used as input data; GBDT model training is performed by taking the target label signal strength as a target value; a real-time change relationship between the anchor label and the target label is established; the problems of low efficiency, high time and labor cost, inaccurate fingerprint updating and the like during fingerprint database updating in the prior art are solved, accurate and rapid updating of the RFID indoor positioning fingerprint database is realized, and the signal sampling work intensity is greatly reduced under the condition of ensuring accurate online updating of the fingerprint database.

Description

technical field [0001] The present disclosure relates to the technical field of indoor positioning, and in particular to an RFID indoor positioning fingerprint database update system and method. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art. [0003] With the development of the Internet of Things, the indoor positioning system based on the Internet of Things has shown a broad market prospect and a wide range of product applications. Radio Frequency Identification (RFID) technology is an advanced technology for information identification through radio frequency signals. Due to the advantages of low price and small size of RFID tags, indoor positioning by using radio frequency identification technology has become a mainstream indoor positioning solution. [0004] In the RFID indoor positioning system, the commonly used methods include the rangin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/33H04W64/00G01S5/14G06F16/23G06N3/08
CPCG01S5/14G06N3/08G06F16/23H04W64/00H04W4/33
Inventor 李歧强谷民阳
Owner SHANDONG UNIV
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