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Indoor positioning method based on combination of WiFi and acoustic waves

An indoor positioning and sound wave technology, applied in positioning, radio wave measurement systems, measurement devices, etc., can solve the problems of low ranging sensitivity and high cost

Active Publication Date: 2017-01-04
江苏智原物联科技有限公司
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Problems solved by technology

[0006] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an accurate indoor positioning method based on the combination of WiFi and sound waves, and simultaneously uses two different types of signals, the WiFi signal and the sound wave signal, for joint ranging, focusing on solving the current situation. There is a problem that the sensitivity of technical ranging is not high or the cost is expensive

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  • Indoor positioning method based on combination of WiFi and acoustic waves
  • Indoor positioning method based on combination of WiFi and acoustic waves
  • Indoor positioning method based on combination of WiFi and acoustic waves

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] Such as figure 1 Shown is an indoor positioning method based on the combination of WiFi and sound waves. More than one beacon is set up indoors. Each beacon periodically sends a WiFi signal and a sound wave signal to the mobile terminal at the same time. According to the time difference between the arrival of the two signals at the mobile terminal To determine the distance between the beacon and the mobile terminal: record the transmission speed of the acoustic signal as v s , record the propagation speed of the WiFi signal as v r , considering v r >>v s , so ignoring the transmission time of the WiFi signal, the time t when the mobile terminal receives the WiFi signal 1 As the sending time of the sound wave signal, the time t when the mobile terminal receives the sound wave signal 2 , the distance between the beacon and the mobile terminal is s=(t 2 -t 1...

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Abstract

The invention discloses an indoor positioning method based on a combination of WiFi and acoustic waves. More than three beacons are set up indoors; each beacon periodically transmits WiFi signals and acoustic wave signals simultaneously to a mobile terminal; the distance between the beacon and the mobile terminal is determined according to an arrival time difference of the two kinds of signals at the mobile terminal; and according to the distance values measured together by the multiple beacons and spatial coordinates of each known beacon, the spatial position of the mobile terminal is calculated. The WiFi signals and the acoustic wave signals are combined, each kind of signals plays a role, and compared with a method of using a single distance measurement signal, the distance measurement is more accurate and reaches a 0.5 decimeter level, and the distance measurement time can be saved.

Description

technical field [0001] The invention relates to an accurate indoor positioning method based on the combination of WiFi and sound waves, which belongs to the indoor positioning technology. Background technique [0002] Indoor precise positioning can help people understand the indoor situation, such as the indoor position of moving objects (personnel, mobile robots, etc.), which is helpful for the statistics of supermarket consumption, the resolution of public safety incidents, and the further development of artificial intelligence. At present, the popular indoor positioning methods in the industry mainly include cellular positioning, WiFi positioning, Bluetooth positioning, infrared positioning, ultra-wideband (UWB) positioning, RFID positioning, ZigBee positioning, ultrasonic positioning, etc., but most of them are used independently of a single indoor positioning method; Among these indoor positioning methods, WiFi positioning, UWB positioning and Bluetooth positioning are ...

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Application Information

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IPC IPC(8): G01S5/10G01S5/26G01S11/16
CPCG01S5/10G01S5/26G01S11/16
Inventor 吴博李笑乾陈甚旭
Owner 江苏智原物联科技有限公司
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