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Single-point difference positioning method

A positioning method and single-node technology, applied in positioning, measuring devices, instruments, etc., can solve the problems of inability to use satellite positioning functions, low positioning accuracy, and inability to use indoor environments.

Inactive Publication Date: 2016-01-27
郁涛
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Problems solved by technology

Although the positioning technology based on navigation satellites is very mature, it cannot be used in indoor environments because microwave signals are easily absorbed and reflected by objects such as buildings.
However, at present, many location-based services and location-aware computing requirements are in non-outdoor areas, and satellite positioning functions cannot be used. For example, when indoor mobile robots drive autonomously, reliable and accurate positioning information must be obtained continuously and in real time.
[0003] The existing single-point short-distance wireless positioning is mainly realized by detecting the received signal strength. This method is easily affected by environmental factors and other factors, and the positioning accuracy is not high.
[0004] In fact, due to various reasons, it is difficult to use multi-node fusion technology to achieve high-precision positioning in many occasions

Method used

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Embodiment

[0034] A high-accuracy measurement Single point phase difference positioning method . attached figure 1 is a one-dimensional bibasic matrix; attached figure 2 The segmental equivalence function curve of the path difference difference is given; attached image 3 Describes the longitudinal position deviation between two points; attached Figure 4 The relative ranging error at different target distances is given.

[0035] Since the amount of information that a single node can obtain is relatively less than that of multiple observation nodes, it is more difficult to achieve better measurement accuracy for single point positioning.

[0036] Recent theoretical analysis has shown that the phase difference measurement technology can use a shorter baseline length to achieve high-precision ranging and positioning, but to realize it in engineering applications, it is necessary to solve the problem of the influence of the measurement error of the wavelength integer cycle numb...

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Abstract

By means of a difference change rate multichannel difference measurement method and a difference change rate non-fuzzy detection method, a positioning range finding equation based on the difference change rate is converted into a combined function of difference direction finding and non-fuzzy path difference, the non-fuzzy path difference value is resolved by means of a difference value measured by one-directional equidistant double arrays, and a directional value of a target is given by means of the difference of a one-directional array, so that a single-node difference positioning method being irrelevant to a difference value of a wavelength integer and being capable of realizing high measurement accuracy is provided.

Description

technical field [0001] The invention relates to radio positioning technology, in particular to a single point positioning method based on phase difference measurement. Background technique [0002] Location-based services and location-aware computing have become more and more important in practical applications, and the development of industries related to such applications, such as intelligent robots, smart homes, and intelligent wireless sensor networks, has entered an explosive period. Although the positioning technology based on navigation satellites is very mature, it cannot be used in indoor environments because microwave signals are easily absorbed and reflected by objects such as buildings. However, at present, many location-based services and location-aware computing requirements are in non-outdoor areas, and satellite positioning functions cannot be used. For example, when indoor mobile robots drive autonomously, reliable and accurate positioning information must b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/06
CPCG01S5/06
Inventor 郁涛
Owner 郁涛
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