Multi-source indoor positioning device and method based on light intensity

Abstract

The invention relates to a multi-source indoor positioning device and method based on light intensity. The multi-source indoor positioning device comprises a light sensor, at least three point light sources, a data processing module and a memory module, wherein the light sensor is used for collecting light signal data sent by the point light sources; the memory module is used for storing light source coordinate values, the light signal data and a light intensity model; the data processing module is used for acquiring light intensity values, establishing a simultaneous equation at least containing three equations according to the light intensity model and the coordinate values of the point light sources, and solving the simultaneous equation to obtain coordinate values (x, y and z) of the light sensor, and the equations are established according to the light intensity model of si = fd (di) fmu (Mui) fomega (Omegai). According to the invention, visible light lamps or the infrared ray point light sources are adopted, a device at a receiving end of the light sensor is integrated to receive light signals and acquire light intensity values, and the coordinates of the sensor are calculated according to the light intensity model, without arranging any other high-precision auxiliary devices, so that the multi-source indoor positioning device and method have the advantages that the positioning accuracy is high and the cost is low.

Description

【Technical field】 [0001] The invention relates to positioning technology, in particular to a multi-light source indoor positioning device and method based on light intensity. 【Background technique】 [0002] With the popularization of information and communication technology, people's demand for indoor positioning information is increasing day by day. Accurate positioning information is required in public places such as shopping malls, airports, exhibition halls, office buildings, warehouses, underground parking lots, etc., such as shopping guides in shopping malls, large-scale Application scenarios such as warehouse management and people tracing in public places. Accurate indoor positioning information can achieve efficient management of available space and inventory materials, and can navigate police, firefighters, soldiers, and medical staff to complete specific indoor tasks in specific places, so indoor positioning technology has broad application prospects. However, tra...

AI Technical Summary

Problems solved by technology

The proximity detection method uses the detected signal source position as the positioning position, and its disadvantage is that the accuracy is low; the fingerprint matching method can obtain high positioning accuracy by using the signal feature matching in the indoor environment, but the positioning result is susceptible to indoor multipath effects and Environmental changes and other influences, and the establishment of a fingerprint database is cumbersome; the multilateral / angle method needs to accurately measure the distance / angle from the positioning point to the reference point through other algorithms in advance, and then use the trilateration method to locate the target. The accuracy of the distance / angle equipment is high, the position information of the reference node is accurate, and the measurement distance is accurate, so the position of the target node can be accurately measured, but the distance / angle equipment with high precision is relatively expensive and the cost is high. Using range / angle equipment with average accuracy will have errors, and the results are not accurate enough

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