Indoor positioning system and method

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...

AI Technical Summary

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, which is easily affected by the environment, and the increase and decrease of the three-party AP of the surrounding points cannot be controlled. On-site measurement and production of offline fingerprint maps, resulting in a huge manual workload and other issues

But at the same time, its layout cost is high, the price of lidar has been high, and there are still problems such as short positioning distance and no response to light-transmitting materials such as glass.

[0007] (4) UWB ultra-wideband has high precision and long positioning distance, but the disadvantage is that it is expensive and easily affected by obstructions, which makes it difficult to apply to indoor positioning with high traffic flow and complex environment, and most can only be used Position in open space

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