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Indoor positioning method of intelligent mobile phone

A smart phone and indoor positioning technology, applied in measuring devices, instruments, surveying and mapping and navigation, etc., can solve the problems of complex positioning system and high cost

Inactive Publication Date: 2014-12-17
BEIJING INST OF SPACECRAFT SYST ENG +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, provide an indoor positioning method for smart phones, and solve the problems of complex positioning system, high cost, and long-term cumulative errors

Method used

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  • Indoor positioning method of intelligent mobile phone
  • Indoor positioning method of intelligent mobile phone
  • Indoor positioning method of intelligent mobile phone

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Embodiment Construction

[0059] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0060] A smart phone indoor positioning method, such as figure 1 shown, including the following steps:

[0061] Step 1. During the walking process of pedestrians, use the built-in acceleration sensor and gyroscope of the smart phone to perform dead reckoning for pedestrians, including judging the movement status of pedestrians, calculating the number of steps that occur, calculating the distance traveled, and estimating changes in the direction of pedestrians to obtain the estimated position information. The specific process of this step is as follows: figure 2 shown, including:

[0062] Step 1.1, using the acceleration sensor readings and the dynamic accuracy method to determine the motion state of the pedestrian.

[0063] In this step, sample the three axes XYZ of the smartphone’s built-in acceleration sensor, calculate the acceleration ...

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Abstract

The invention relates to an indoor positioning method of an intelligent mobile phone. The indoor positioning method is technically characterized by comprising the following steps of 1, in a walking process of a pedestrian, performing pedestrian dead reckoning, such as judging a moving state of the pedestrian, calculating the number of generated steps, calculating a walking distance and reckoning the direction change of the pedestrian through an acceleration sensor and a gyroscope which are arranged in the intelligent mobile phone, thus obtaining reckoned position information; and 2, constructing an indoor environment magnetic field map, performing magnetic field matching by a particle filtering algorithm according to information which is acquired by the indoor environment magnetic field map and a magnetic field sensor in real time, and correcting the reckoned position information so as to obtain a final position of the pedestrian. According to the indoor positioning method, the robustness of indoor positioning is improved from two aspects of a method for resisting various handheld mobile phones and a method for processing different step lengths; the matching precision is improved by improving the stability of a magnetic field matching judging and determining weight and reducing a system accumulation error, so that long-time accumulated errors are avoided; the system complexity is reduced by reducing the amount of external equipment.

Description

technical field [0001] The invention belongs to the technical field of indoor positioning, in particular to an indoor positioning method for smart phones. Background technique [0002] Indoor positioning refers to the positioning of people or objects in an indoor environment. The goal of indoor positioning is a positioning system formed by inertial navigation, base station, ultra-wideband and other technologies, so as to realize the position monitoring function of pedestrians or objects in indoor space. [0003] In recent years, indoor positioning technology has developed rapidly. Generally speaking, there are two main implementation methods for indoor positioning technology. The first one is based on infrared (Infra-Red, IR). field of view; the second is based on radio frequency (Radio Frequency, RF) method, for example, PaschouM proposed a Wi-Fi-based intelligent mobile positioning system (M.Paschou, E.Sakkopoulos, A.Tsakalidis, et al. Intelligent Mobile Recommendations...

Claims

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Application Information

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IPC IPC(8): G01C21/00
CPCG01C21/18
Inventor 刘崇华姜竹青张弓王庆华黄承恺王雪旸王宇鹏刘欣萌李超门爱东杨波杨玉莹宋洪超
Owner BEIJING INST OF SPACECRAFT SYST ENG
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