Method of using intelligent mobile phone to assist indoor positioning

A smart phone and auxiliary room technology, applied in location information-based services, instruments, navigation, etc., can solve the problems of expensive card readers and tags, high cost of card readers, uneconomical card readers, etc., and achieve energy consumption Low, accurate positioning results

Active Publication Date: 2017-05-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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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

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  • Method of using intelligent mobile phone to assist indoor positioning
  • Method of using intelligent mobile phone to assist indoor positioning
  • Method of using intelligent mobile phone to assist indoor positioning

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[0059] In the following, the present invention will be further clarified with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are only used to illustrate the present invention and not to limit the scope of the present invention. After reading the present invention, those skilled in the art will understand various aspects of the present invention. Modifications of the price form all fall within the scope defined by the appended claims of this application.

[0060] A method of using a smart phone to assist indoor positioning, such as Figure 8 As shown, including the following steps:

[0061] Step 1. Data collection: Collect the air pressure value of each smart phone's location through the built-in air pressure sensor of each smart phone, and the collected air pressure value composes the air pressure change track of each smart phone. Scan the surrounding Wi-Fi signals through the built-in Wi-Fi wireless module of each smart...

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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...

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Application Information

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IPC IPC(8): H04W4/02H04W64/00G01C21/20
CPCG01C21/206H04W4/025H04W4/029H04W64/00
Inventor 叶海波
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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