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Asynchronous indoor positioning method based on intelligent terminal and ultrasonic communication

An intelligent terminal, indoor positioning technology, applied in positioning, ultrasonic/sonic/infrasonic transmission systems, radio wave measurement systems, etc., can solve problems such as complex implementation, achieve cost and engineering reduction, long transmission distance, and simple implementation methods Effect

Active Publication Date: 2020-04-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, multiple transmitting nodes are required to transmit ultrasonic signals at the same time, which requires an additional terminal to control multiple transmitting nodes to simultaneously transmit ultrasonic signals or multiple transmitting nodes to achieve time synchronization through a synchronization protocol, which is more complicated to implement

Method used

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  • Asynchronous indoor positioning method based on intelligent terminal and ultrasonic communication
  • Asynchronous indoor positioning method based on intelligent terminal and ultrasonic communication
  • Asynchronous indoor positioning method based on intelligent terminal and ultrasonic communication

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Embodiment 1

[0050] Such as figure 1 As shown, in daily life, people often go to some large shopping malls for leisure and entertainment. When shopping with their children in large shopping malls, some children often get separated inadvertently. Assuming that the child has been equipped with a smart watch, the guardian hopes to obtain the specific location of the child's smart watch terminal through the smart phone terminal and search for it. Taking advantage of the background that many businesses in large shopping malls will be equipped with speakers, each speaker can be used as a signal transmitting node, and the ultrasonic signal carrying information is generated through the smart phone terminal and transmitted to the speaker, and broadcast through the speaker; the smart watch terminal controls the microphone Perform ultrasonic signal search, and obtain location information (such as launch time stamp, speaker coordinates, link to the indoor structure diagram of the commercial center) by...

Embodiment 2

[0065] An indoor positioning method based on intelligent terminal and ultrasonic signal communication, using existing hardware equipment to generate 20KHz-24KHz ultrasonic signals carrying location information, using speakers as indoor signal transmitting nodes to transmit ultrasonic signals carrying location information, and using A smart terminal such as a smart phone terminal uses a microphone as a receiving end to demodulate the received ultrasonic signal and obtain the location information carried by the ultrasonic wave. The specific steps are as follows:

[0066] The indoor signal transmitting node modulates and transmits the ultrasonic signal, the process is as follows:

[0067] Initialize the positioning information, initialize the pre-saved positioning information file containing the location information into an executable binary file, where the location information includes the time stamp information of the transmitted signal, the specific location information of the...

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Abstract

The invention discloses an asynchronous indoor positioning method based on an intelligent terminal and ultrasonic communication. According to the method, existing hardware equipment is utilized; a loudspeaker or an intelligent terminal (such as a portable computer and the like) with the loudspeaker is mainly used as an indoor signal transmitting node; the method comprises the following steps of performing modulation to enable an ultrasonic signal to carry information and broadcast, controlling a microphone to search and receive the ultrasonic signal by taking an intelligent terminal (such as asmart phone terminal, a smart watch terminal and the like) carrying the microphone as a receiving end, and demodulating the received signal to obtain the information; and if three or more ultrasonicsignals are received, calculating the transmission delay of each ultrasonic wave by utilizing the digital demodulation information, and obtaining the accurate position of the intelligent terminal by adopting a spatial positioning operation method, so that indoor positioning is realized. The method has the advantages of low cost, convenience in implementation and simplicity in application.

Description

technical field [0001] The invention relates to the technical field of ultrasonic communication and indoor positioning, in particular to an asynchronous indoor positioning method based on an intelligent terminal and ultrasonic communication. Background technique [0002] In many large commercial centers, people often cannot clearly know the specific location of the destination when they are in leisure and entertainment, and large shopping malls are crowded with people, and it is easy to get separated from friends or children; secondly, it is similar to that in some large indoor shopping malls. In exhibitions and other situations, it is usually impossible to quickly obtain the specific location of the target booth without knowing its structural layout. The emergence of indoor positioning technology can better solve such problems. [0003] The Global Positioning System (GPS), by far the most common positioning system, uses signals from satellites in geostationary orbit to calc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/30H04B11/00
CPCG01S5/30H04B11/00Y02D30/70
Inventor 刘娇蛟刘新伟马碧云
Owner SOUTH CHINA UNIV OF TECH
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