Method of using intelligent mobile phone to assist indoor positioning

Abstract

The invention discloses a method of using an intelligent mobile phone to assist indoor positioning. The accuracy of indoor positioning is improved through accurately positioning the floor of a user. The method comprises steps: an air pressure change trajectory when the user moves in a building is monitored through an air pressure sensor of the mobile phone; when multiple users are in the same elevator or Wi-Fi reading of the multiple users is close, the air pressure sensors of the users are calibrated in pairs; the air pressure change trajectories of the users are all uploaded to a center server, the server combines the multiple trajectories, a trajectory map containing the air pressure value of each floor is obtained, and thus, according to the air pressure reading of the user, the floor of the user is positioned; and according to Wi-Fi signals around the user with the known floor, a Wi-Fi map corresponding to the floor is built, and the Wi-Fi map is used for positioning a floor for a user whose mobile phone is not provided with the air pressure sensor. the method can position the floor of the user in the current building, the indoor positioning range can be narrowed, and the positioning precision is improved.

Description

technical field [0001] The invention relates to a method for automatically locating which floor a user is in a building through an air pressure sensor of a user's smart phone, and belongs to the technical field of positioning. Background technique [0002] In today's rapidly developing field of location-based applications, positioning with a smartphone plays an important role. At present, most positioning technologies require the support of certain infrastructures, such as cellular networks, Wi-Fi wireless networks, and the Global Positioning System (GPS). Each of these technologies has its own advantages and disadvantages, and has limitations in accuracy and usage scenarios. In the field of positioning technology, how to locate which floor a user is in a building is a very hot issue, because if such information is known, relevant services can be provided to the user, such as advertisements, Guidance, and rescue search. [0003] At present, the known positioning technolog...

AI Technical Summary

Problems solved by technology

[0012] RFID-based positioning technology has high accuracy, but it has many disadvantages. It is time-consuming and labor-intensive to deploy a large number of card readers and tags, and a large number of card readers and tags are very expensive; Because general mobile phones do not have the function of card readers, due to the high cost of card readers, it is very uneconomical to deploy card readers with a certain density in buildings

[0013] At present, the above-mentioned technologies are mainly used for indoor positioning; however, there is no relevant report on the realization of indoor floor positioning through the combination of the first and second types of technologies.

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