Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Indoor positioning method based on conjugate gradient method

A conjugate gradient method and indoor positioning technology, applied in the direction of using re-radiation, measuring devices, instruments, etc., can solve the problem of inaccurate positioning of the centroid algorithm

Inactive Publication Date: 2018-01-19
NANJING UNIV OF POSTS & TELECOMM
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to propose an indoor positioning method based on the conjugate gradient method to solve the problem of inaccurate positioning of the centroid algorithm in RFID positioning technology in view of the defects of the background technology

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Indoor positioning method based on conjugate gradient method
  • Indoor positioning method based on conjugate gradient method
  • Indoor positioning method based on conjugate gradient method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0056] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0057] Such as figure 1 As shown, in the present invention, due to the long RFID transmission distance and high positioning accuracy, the general positioning space is selected relatively large. When the present invention actually deploys RFID, considering cost and other factors, three RFID readers and one RFID tag are selected. RFID reader And the actual specific of the RFID tag is 20m.

[0058] Such as figure 2 Shown is a schematic diagram of the trilateral positioning algorithm of the present invention, with three reference nodes as the center of the circle, the corrected distance as the radius, three circles intersecting in one area, and three sets of equations are listed:

[0059]

[0060] Three sets of solutions are obtained separately, and the solution obtained in each set of equations is discarded, and the solution farthest from the remaining thi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an indoor positioning method based on a conjugate gradient method, and belongs to the field of indoor positioning methods. Position estimation of an unknown label is conductedthrough a distance measuring method based on signal intensity, and optimal estimation is conducted on a result through an optimal method, and a position result with lowest errors is obtained. In a condition of a logarithm normal state transmission loss model, an intensity value of a received signal is measured, the influence of multiple aspects upon an RSSI value is taken into account, the RSSI value is corrected through a Gauss model and a mean value method, a distance is corrected through the least square method, the position of the unknown label is solved through a three-edge positioning algorithm, and the accurate position of the unknown label is solved by means of a conjugate gradient method in the optimal method. According to the method, the indoor positioning precision can be improved and positioning errors can be reduced.

Description

technical field [0001] The invention relates to the field of indoor positioning methods, in particular to an indoor positioning method based on a conjugate gradient method. Background technique [0002] Indoor positioning technology refers to the realization of position positioning in the indoor environment. It mainly uses wireless communication, base station positioning and other technologies to integrate a set of indoor position positioning system, so as to realize the position monitoring of people and objects in the indoor space. When satellite positioning cannot be used in an indoor environment, indoor positioning technology is used as an auxiliary positioning of satellite positioning to solve the problem that satellite signals are weak when they reach the ground and cannot penetrate buildings. [0003] The present invention adopts the RFID-based WSN positioning technology. RFID positioning technology uses radio frequency to conduct non-contact two-way communication and...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01S11/06G01C21/20
Inventor 董恒张志伟谭建勇
Owner NANJING UNIV OF POSTS & TELECOMM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com