Indoor positioning method based on GPS network and ground coordinate network

Abstract

The invention discloses an indoor positioning method based on a GPS network and a ground coordinate network, and relates to the indoor positioning method; the method comprises the following steps: firstly, obtaining GPS data of assigned beacon points of a building; secondarily, obtaining an indoor space distribution information plan of a building floor; then, gridding and dividing the indoor areaaccording to positioning precision requirements, and building an indoor ground coordinate network; finally, converting and calculating indoor position GPS coordinate information according to GPS dataof the assigned beacon points and coordinates of an object in the indoor coordinate network, thus realizing indoor positioning. The method can directly obtain the indoor object GPS data without installing extra equipment, can realize indoor and outdoor compatible positioning, is strong in practical value, and wide in applications.

Description

technical field [0001] The invention relates to an indoor positioning method, in particular to an indoor positioning method based on a GPS network and a ground coordinate network. Background technique [0002] At present, outdoor GPS positioning and navigation are more and more widely used, which brings great convenience to people's life and travel. At the same time, with the increasing number of large indoor venues, such as shopping malls and airports, people are eager to know the location of objects indoors. Because the indoor GPS signal is missing or not strong enough, it is impossible to receive a sufficiently accurate GPS signal indoors for positioning. [0003] Existing technology A GPS-based indoor offline path guidance method and system proposed by Duan Qichang et al. uses the acquired accurate GPS information of the preset beacons on the roof of the building, combined with the indoor space distribution information plan through the vertical projection method, to obt...

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Problems solved by technology

The above methods can realize the positioning of indoor GPS information, but it is not difficult for us to see the shortcomings: (1) the technical requirements of the GPS-based indoor offline route guidance method and system require multiple GPS data collection at the top of the building, and at the same time It will be limited by the structure of the roof of the building; (2) The positioning method based on indoor pseudolite spreading code identification needs to install additional signal equipment, and mutual interference of signals often occurs at the connection of the service area; (3) The above method Although indoor GPS information positioning can be realized, the positioning accuracy is insufficient and the error is large

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