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

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...

AI Technical Summary

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 bottleneck. The strong demand for indoor positioning makes how to make full use of user terminals to achieve indoor high-precision positioning has become an urgent problem to be solved.

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