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Multi-target real-time positioning device and positioning method

A real-time positioning and target technology, applied in positioning, measuring devices, instruments, etc., can solve the problems of poor ranging accuracy of TOA positioning system, affecting the positioning accuracy of the system, and achieve the effect of simple and effective positioning method and low system overhead.

Active Publication Date: 2011-06-01
BEIJING LOIT TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex indoor channel environment, the ranging accuracy of the TOA positioning system is poor, which seriously affects the positioning accuracy of the system
It is very challenging to achieve accurate positioning of objects in indoor environments

Method used

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  • Multi-target real-time positioning device and positioning method
  • Multi-target real-time positioning device and positioning method
  • Multi-target real-time positioning device and positioning method

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Experimental program
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Embodiment Construction

[0037] The present invention will be further described below in conjunction with accompanying drawing:

[0038] see figure 1 , the figure shows a method for real-time positioning of multiple targets according to an embodiment of the present invention, which specifically includes steps:

[0039] Step S101: setting the ranging error range of the monitoring node in the monitoring area;

[0040] Through a large number of point-to-point ranging experiments, the range of the ranging error of the monitoring node in the monitoring area can be obtained:

[0041] e∈[(R m -D m ) min , (R m -D m ) max ]

[0042] ∈[i,j]

[0043] Among them, e is the ranging error range of the monitoring node in the monitoring area, R m is the distance obtained by the TOA ranging of the monitoring node in the monitoring area, D m is the actual distance, m∈[1,n], n is the total number of ranging experiments, (R m -D m ) min means to take R m with D m The minimum value of the difference, its ...

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Abstract

The invention provides a multi-target real-time positioning device and positioning method. The positioning method comprises the steps of: confirming the area of positioning coordinates of a positioning target at the current moment; respectively constructing annular areas with position coordinates of a plurality of monitoring nodes as circle centers, with maximum ranging distance of each monitoring node in the range of permitted errors as an outer circumference radius and with minimum ranging distance of each monitoring node in the range of permitted errors as an inner circumference radius; judging one area with most overlaps of the constructed annular areas in the area of the positioning coordinates of the positioning target at the current moment; and calculating center-of-mass coordinates of the area with most overlaps, which serves as the positioning coordinates of the positioning target at the current moment. The positioning method is suitable for TOA (Time of Arrival) positioning under indoor channel environment, is simple and effective, and has the characteristics of high precision, small system overhead, real-time and the like.

Description

technical field [0001] The invention relates to a TOA (Time of arrival, time of arrival) real-time positioning device and positioning method in an indoor channel environment. Background technique [0002] The real-time positioning system has great application value and market potential. It is usually used to provide location-based services for airports, industrial parks and other areas, such as tourist guidance, material monitoring, personnel tracking and restricted area intrusion monitoring and other services. The TOA (Time of arrival) ranging method has high ranging accuracy and is a commonly used ranging method in many target positioning systems. The real-time positioning system based on TOA ranging is currently a commonly used real-time positioning system. Due to the complex indoor channel environment, the ranging accuracy of the TOA positioning system is poor, which seriously affects the positioning accuracy of the system. Accurate positioning of objects in an indoor e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/10
Inventor 黄孝斌魏剑平樊勇何杰张莹
Owner BEIJING LOIT TECH
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