Indoor positioning method and system

An indoor positioning and coordinate system technology, applied in the field of positioning, can solve the problems of no longer applicable, low precision of wireless network signal positioning technology, and convenient cost, etc., and achieve the effect of real-time positioning, low cost, and high positioning accuracy

CN103257338AInactive Publication Date: 2013-08-21UNIV OF SCI & TECH OF CHINA
3 Cites 8 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2013-08-21
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses an indoor positioning method and system. Through frequency deviation and phase deviation generated by the Doppler effect when sound wave signals are received based on a mobile phone, the distance between a mobile terminal and a loudspeaker is calculated, so real-time positioning for the mobile terminal is achieved. According to the method and system, positioning can be completed without the need of additional installation of any special devices, cost is low, and positional accuracy is high.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to the technical field of positioning, in particular to an indoor positioning method and system. Background technique

[0002] Nowadays, indoor positioning technology generally utilizes wireless network signals throughout the indoor environment, and performs positioning according to its characteristics, or uses some special equipment to perform positioning.

[0003] However, the positioning technology based on wireless network signals has low accuracy and is no longer applicable in supermarkets, libraries and other scenarios. Since the positioning based on special equipment requires expensive special equipment or special devices need to be installed on the mobile phone, this positioning technology also has problems of cost and convenience. Contents of the invention

[0004] The purpose of the present invention is to provide an indoor positioning method and system, which improves the positioning accuracy and reduces the ...

Examples

Embodiment 1

[0020] figure 1 It is a flow chart of an indoor positioning method provided by Embodiment 1 of the present invention. Such as figure 1 As shown, the method mainly includes the following steps:

[0021] Step 11. The mobile terminal receives sound waves of a specified frequency sent from speakers in various directions by shaking, and calculates the Doppler frequency offset of the sound wave signal of each speaker when the mobile terminal is shaken.

[0022] The speakers can be pre-installed at various positions in the room, and each speaker sends a sine wave of a specified frequency, and the frequencies are different from each other, so that the terminal can identify different speakers according to the frequency.

[0023] The mobile terminal (for example, mobile phone, tablet computer, handheld computer, etc.) in the user's hand can receive the acoustic signal by shaking, so the acoustic signal from all directions will be affected by the Doppler effect, resulting in frequency ...

Embodiment 2

[0062] figure 2 It is a schematic diagram of an indoor positioning system provided by Embodiment 2 of the present invention. Such as figure 2 As shown, the system mainly includes:

[0063] The Doppler effect calculation unit 21 is used to calculate the Doppler frequency offset of the sound wave signal of each speaker when the mobile terminal receives sound waves of a specified frequency sent from speakers in various directions in a shaking manner;

[0064] The mobile terminal initial position information calculation unit 22 is used to obtain the direction vector of each loudspeaker sound wave signal according to the calculated Doppler frequency offset of each loudspeaker sound wave signal and the velocity vector of the mobile terminal in the world coordinate system, And calculate the initial position information of the mobile terminal indoors according to the direction vector of the sound wave signal of the speaker and the position of the corresponding speaker;

[0065] T...