Mobile equipment near field distance measurement positioning method based on acoustics

Abstract

The invention discloses a mobile equipment near field distance measurement positioning method based on acoustics. The method mainly solves the problems of low distance measurement precision and complicated distance measurement equipment in the prior art. The method has the technical scheme that (1) emitting signals are manufactured by using a linear frequency modulation principle; (2) main node mobile equipment starts wifi to build a local area network, and the local area network is connected from the node mobile equipment; (3) the distance between every two pieces of mobile equipment is measured; (4) four pieces of mobile equipment are used for determining a relative space coordinate system; (5) when new mobile equipment is added into the local area network, the distance information between the new mobile equipment and the positioned mobile equipment in the local area network is used for determining the coordinates of the mobile equipment; (6) when one piece of positioned mobile equipment moves, the coordinate information of the mobile equipment is continuously updated by using the method in (5), and the mobile track tracking is realized. The method provided by the invention has the advantages that the positioning precision is high; the robustness on the noise is good; meanwhile, the moving is convenient; the method can be used for application requiring positioning or tracking in near field environment.

Description

technical field [0001] The invention belongs to the field of sound distance measurement and positioning, in particular to an acoustic-based distance measurement method for mobile equipment in a near-field environment, which can be used in applications that need to determine the mutual distance and relative position between mobile terminals in a short-distance environment. technical background [0002] Positioning technology has a very wide range of applications in modern society where mobile devices are popular. Because of its low cost and high positioning accuracy, the GPS system has been popularized in outdoor wide-area positioning. However, due to the blockage of satellite signals by large buildings, the application of GPS positioning technology in indoor near-field positioning is greatly limited. The positioning technology based on electromagnetic waves is also difficult to apply to near-field positioning due to cost, accuracy or volume reasons. Specifically, the posit...

AI Technical Summary

Problems solved by technology

The disadvantage is that the beacon group and central station need to be provided indoors, which increases the system cost

But the disadvantage is that the indoor positioning accuracy is not high, it can only reach the meter level, and the electromagnetic wave system is used for distance measurement, which requires a high-precision clock and the cost is high

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