Indoor positioning method based on intelligent mobile terminal with sound ranging function

An intelligent mobile terminal and indoor positioning technology, applied in positioning, measuring devices, radio wave measuring systems, etc., to achieve high-precision indoor positioning and good scalability

Inactive Publication Date: 2016-11-23
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing location services based on smart mobile terminal platforms mainly rely on GPS information for acquisition. The research on indoor positioning technology is still at the bot

Method used

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  • Indoor positioning method based on intelligent mobile terminal with sound ranging function
  • Indoor positioning method based on intelligent mobile terminal with sound ranging function
  • Indoor positioning method based on intelligent mobile terminal with sound ranging function

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[0021] The present invention is an intelligent mobile terminal indoor positioning method based on sound ranging. The specific work flow is as follows figure 1 As shown, the user's mobile terminal first initiates a positioning request, and the server responds to the request and distributes instructions to control the broadcast of the beacon node and the user's mobile terminal acoustic signals. The beacon node respectively estimates the time delay of the acoustic signal and sends it to the user's mobile terminal together with the position coordinates of the beacon. The user mobile terminal calculates the distance to each beacon according to the delay estimation result and the position of the beacon, and then obtains the user position estimate according to the positioning algorithm, and displays it on the interface.

[0022] The present invention is a smart mobile terminal indoor positioning method based on sound ranging. The method includes the following steps:

[0023] 1. Such as ...

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Abstract

The invention relates to an indoor positioning method based on an intelligent mobile terminal with a sound ranging function. According to the method of the invention, high-accuracy clock synchronization is realized by using sound technologies; a synchronization node transmits modulation sound signals, and nodes realize clock synchronization according to the arrival time of the sound signals and the coordinate information of each node; a positioning request is initiated autonomously through the intelligent mobile terminal of a user; a server is only responsible for command response and distribution; and indoor positioning is achieved through sound signal interaction between the user and a beacon node. Since all positioning calculation processes are carried out in the node ends and the intelligent mobile terminal of the user, better user privacy protection can be realized. Without relying on indoor disabled GPS signals and extra hardware equipment, the method of the invention can realize high-precision indoor positioning just by means of the microphone, the loudspeaker and the processor of the intelligent mobile terminal and through the interaction of linear frequency modulation sound signals between the user and the beacon.

Description

Technical field [0001] The invention belongs to the field of Location Based Service, and particularly relates to an indoor positioning method of an intelligent mobile terminal based on sound ranging. Background technique [0002] Location technology is an indispensable and important part of daily life. Location-based location services (LBS) have become an important guarantee for people's daily travel, tourism, shopping, food, accommodation and other aspects of life. Due to the maturity of GPS positioning technology, its higher accuracy and scope of application have promoted the rapid development of map applications and related services, and played a decisive role in daily travel navigation and all aspects of life. As the indoor space for people's activities becomes larger and more complex, the need for indoor positioning technology is becoming more and more obvious, such as precision marketing, medical rescue, mobile robot positioning, smart conferences, shopping mall positioning...

Claims

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Application Information

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IPC IPC(8): G01S5/18
CPCG01S5/18
Inventor 王智黄丹洁张磊文祥计林峰黄逸帆
Owner ZHEJIANG UNIV
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