Indoor positioning system and method

An indoor positioning and intra-area technology, which is applied in radio wave measurement systems, services based on location information, services based on specific environments, etc., can solve problems such as high construction costs, limited measurement distance, and large manual workload, and achieve The effect of low construction difficulty

Active Publication Date: 2019-07-09
苏州矽典微智能科技有限公司
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Problems solved by technology

[0004] (1) The disadvantages of the radio frequency signal strength triangulation method are: the measurement distance is limited, and the area to be positioned needs to be divided into several small areas; the accuracy is poor, and it is seriously affected by the environment (temperature, humidity, and human flow will all affect the same positioning point. signal strength); additional construction costs are high, requiring radio frequency transmitters to be placed on terminal equipment and large-scale deployment of signal receivers indoors
[0005] (2) The RF signal strength fingerprint positioning method has the advantages of no need for additional construction and low cost, but it also has the disadvantages of poor accuracy of the triangulation positioning method, whic

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Embodiment 1

[0027] This embodiment discloses an indoor positioning system. In this system, the positioning method is also divided into two stages: offline and online. In the offline stage, the indoor area to be positioned will be divided into several large areas, where the area division density is much smaller than the area division of the RF signal strength triangulation method. A square area with a side length of about 100 meters, that is, an area covering an area of ​​about 10,000 square meters, and millimeter-wave radars are deployed at the four corners. For general indoor scenes, if the area does not meet this requirement, no division is required.

[0028] The indoor positioning system of this embodiment includes a wifi fingerprint collection unit, which can be a terminal device including a wifi sta module, which can collect the signal strength of wifi fingerprint points in the area of ​​the above-mentioned preset size (100*100), and perform offline WiFi fingerprint collection, spe...

Embodiment 2

[0039] Such as figure 1 As shown, the indoor positioning method of this embodiment can be implemented by the indoor positioning system described in Embodiment 1. Specifically, the indoor positioning method may include the following steps:

[0040] Step S101, collect wifi fingerprint point signal strength within a preset size area.

[0041] Implementation can be accomplished through the wifi fingerprint collection unit in embodiment 1, such as a terminal device including a wifi sta module.

[0042] Step S102, combining the wifi fingerprint point signal strength with the site map to generate a fingerprint map.

[0043] After the server finishes drawing the fingerprint map according to the received data parameters, it can further divide each of the areas into multiple sub-areas.

[0044] Step S103, receiving the wifi signal strength list sent by the positioning object side.

[0045] Step S104, performing curve fitting on the fingerprint map according to the data in the wifi s...

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Abstract

The invention discloses an indoor positioning system and method, and the system comprises a wifi fingerprint collection unit which is configured to collect the signal intensity of a wifi fingerprint point in an area with a preset size; a server configured to combine the wifi fingerprint point signal intensity with an on-site map to generate a fingerprint map, receive a wifi signal intensity list sent by a positioning object side, perform curve fitting on the fingerprint map according to the data of the wifi signal intensity list, and judge the closest wifi fingerprint point; a millimeter waveradar arranged in the region and configured to collect the motion track of the suspected target object and compare the motion track with the track record of the wifi fingerprint point so as to judge the real target object. Through the system and the method, the comprehensive optimization of the positioning precision and distance, the construction difficulty and the cost of the indoor positioning technology can be realized in a balanced manner.

Description

technical field [0001] The present invention relates to indoor positioning technology, in particular to an indoor positioning system and method. Background technique [0002] Current indoor positioning methods mainly include: positioning through radio frequency signal strength; positioning through laser radar; positioning through ultra-wideband UWB. Among them, positioning by radio frequency signal strength can be divided into triangulation positioning method and fingerprint positioning method. [0003] The above positioning methods more or less have technical and application bottlenecks. For example: [0004] (1) The disadvantages of the radio frequency signal strength triangulation method are: the measurement distance is limited, and the area to be positioned needs to be divided into several small areas; the accuracy is poor, and it is seriously affected by the environment (temperature, humidity, and human flow will all affect the same positioning point. signal strength...

Claims

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Application Information

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IPC IPC(8): H04W4/02H04W4/021H04W4/029H04W4/33H04W64/00G01S11/06
CPCG01S11/06H04W4/021H04W4/027H04W64/00H04W4/029H04W4/33
Inventor 陈涛
Owner 苏州矽典微智能科技有限公司
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