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Ultrasonic wave based indoor three-dimensional positioning system and method

A three-dimensional positioning and ultrasonic technology, applied in the field of positioning and navigation, can solve the problems of low radio frequency positioning accuracy and small ultrasonic positioning coverage, and achieve the effects of low cost, low power consumption and good confidentiality

Inactive Publication Date: 2011-11-23
CHANGCHUN UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

The main problems of traditional positioning methods are: the positioning accuracy of single radio frequency is not high; the coverage of single ultrasonic positioning is small

Method used

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  • Ultrasonic wave based indoor three-dimensional positioning system and method
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  • Ultrasonic wave based indoor three-dimensional positioning system and method

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Embodiment Construction

[0024] An ultrasonic-based indoor three-dimensional positioning system and method, the equipment and working steps required by the system are as follows:

[0025] Equipment needed: such as figure 1 As shown, the system includes a beacon group 1 composed of N beacons, a central station 2 and a target node 3 . Among them, each beacon in the beacon group 1 is composed of a radio frequency chip, a single-chip microcomputer and an ultrasonic transmitter; the central station 2 is composed of a radio frequency chip, a single-chip microcomputer and a temperature sensor; the target node 3 is composed of a radio frequency chip, a TMS320F2812 processor, and an ultrasonic receiver composition.

[0026] Work steps:

[0027] Step 1: In the ranging stage, the TDOA algorithm, namely the Time Difference Of Arrival algorithm, is used to calculate the distance between the target node 3 and the beacons in the beacon group 1. This stage includes the following steps:

[0028] Step 1.1: The centr...

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Abstract

The invention provides an ultrasonic wave based indoor three-dimensional positioning system and method, which belong to the technical field of positioning and navigation. The system is a wireless sensor network system, and through combining with the radio frequency technology and the ultrasonic technology, the system can implement accurate positioning by using a TDOA (time difference of arrival) algorithm and a trilateral location algorithm. By using the system provided by the invention, the centimeter-level positioning accuracy can be achieved, and the real-time positioning of a plurality of target nodes in a passive positioning mode can be realized, so that the application of the system in positioning or navigating a plurality of targets becomes possible. The system also has the advantages of good confidentiality, low cost and low power consumption.

Description

technical field [0001] The invention relates to an ultrasonic-based indoor three-dimensional positioning system and method, belonging to the technical field of positioning and navigation. Background technique [0002] Indoors is the place where human activities are the most intensive and most related to human life and production. Indoor positioning can be regarded as the most closely related component of positioning technology and people, and its important potential applications have attracted a lot of research and attention in recent years. Due to the existence of a large number of obstacles such as walls and screens in the room, the multipath effect is serious, and the field strength distribution is uneven and even blind spots exist. The frequent movement of people, the opening and closing of electronic equipment and doors and windows also bring a lot of random and unpredictable interference and fluctuations to signal transmission. Therefore, positioning technology for c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/30
Inventor 杨阳刘智肖金红赵义武王英志刘丹
Owner CHANGCHUN UNIV OF SCI & TECH
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