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High precision indoor positioning system

An indoor positioning and high-precision technology, applied in the field of indoor positioning and navigation, can solve the problems of high hardware cost, error audio data processing speed, and poor accuracy, and achieve the requirements of reducing system cost, ensuring positioning accuracy, and reducing clock synchronization Effect

Active Publication Date: 2017-09-22
UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of the above synchronization scheme is poor accuracy and high cost. The main factors affecting the accuracy are the inherent errors of the wireless protocol and the differences in the audio data processing speed of different receiving nodes, and each receiving node requires a wireless module, resulting in hardware costs. higher

Method used

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Embodiment Construction

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0039] The embodiment of the present invention provides a high-precision indoor positioning system, which mainly includes: M fixed microphone modules, N audio processing modules, wireless modules and servers, each audio processing module is connected to two adjacent microphone modules connected; where:

[0040] The microphone module is used to pick up the modulated audio signal emitted by the speaker operated by the smart terminal APP;

[0041] Th...

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Abstract

The invention discloses a high precision indoor positioning system. The high precision indoor positioning system comprises M fixedly-arranged microphone modules, N audio processing modules, a wireless module, and a server. Each audio processing module is connected with the two adjacent microphone modules. The microphone modules are used to pick up audio signals, which are modulated and transmitted by a loudspeaker controlled by an intelligent terminal APP. The audio processing modules are used to acquire and process the audio signals acquired by the two adjacent microphone modules synchronously, and audio signal arrival time points are detected by adopting an audio arrival time point detection algorithm, and therefore arrival time difference information is calculated. The wireless module is used to collect the arrival time difference information calculated by the various audio processing modules in a positioning period, and is used to transmit the arrival time difference information to the server. The server is used to calculate the position of the intelligent terminal according to the received arrival time difference information, and is used to feed the position of the intelligent terminal back to the intelligent terminal, and the intelligent terminal is used to display the current position, and is used to draw a motion track. The high precision indoor positioning system has advantages of high positioning precision and low costs.

Description

technical field [0001] The invention relates to the field of indoor positioning and navigation, in particular to a high-precision indoor positioning system. Background technique [0002] Indoor precise positioning has broad application prospects in security, medical, commercial promotion and other fields, and has become a hot research field nowadays. At present, the technologies used for indoor positioning are based on RF, optics, geomagnetism, IMU, audio, etc. Among them, the indoor positioning technology based on audio has the advantages of low hardware cost, no need for high-precision clocks, and high positioning accuracy. focus on. [0003] According to the type of base station, there are two main high-precision audio-based indoor positioning methods: (1) The intelligent terminal transmits audio, and multiple fixed nodes receive audio. Location. (2) Multiple fixed nodes transmit audio, and the smart terminal receives audio. This method calculates the terminal position...

Claims

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Application Information

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IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 曹帅陈香张旭
Owner UNIV OF SCI & TECH OF CHINA
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