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Indoor positioning method based on fuzzy theory and multi-sensor fusion

A multi-sensor fusion, fuzzy theory technology, applied in instruments, measuring devices, mapping and navigation, etc., can solve problems such as high cost and complex positioning system

Inactive Publication Date: 2015-10-14
BEIJING NAER XINTONG TECH CO LTD
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  • Abstract
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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 based on fuzzy theory and multi-sensor fusion, and solve the problems of complex positioning system, high cost, and long-term cumulative errors

Method used

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  • Indoor positioning method based on fuzzy theory and multi-sensor fusion
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  • Indoor positioning method based on fuzzy theory and multi-sensor fusion

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Embodiment Construction

[0058] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:

[0059] An indoor positioning method based on fuzzy theory and multi-sensor fusion, comprising the following steps:

[0060] 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.

[0061] The specific process of this step is as follows: figure 2 shown, including the following steps:

[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...

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Abstract

The invention relates to an indoor positioning method based on fuzzy theory and multi-sensor fusion. The indoor positioning method is technically characterized by comprising the steps of according to multiple sensors arranged in an intelligent mobile phone, acquiring data of an acceleration sensor, a gyroscope and a barometer of the intelligent mobile phone firstly, and then the fuzzy theory is applied to the acquired data, speculating the motion state, step number and step length of a pedestrian so as to obtain the calculated position information; meanwhile, acquiring the user height from the information of the barometer; and establishing an indoor environment magnetic field map, acquiring information in real time by utilizing the indoor environment magnetic field map and magnetic field sensors, matching magnetic fields through the fuzzy theory and correcting the calculated position information to obtain the final position of the pedestrian. According to the method, the indoor positioning robustness is promoted through two aspects of multiple intelligent mobile phone carrying methods and processing of different step lengths. Through the matching of the fuzzy theory of the magnetic field, the accumulated errors can be reduced, the accuracy is improved, and the system complexity can be lowered.

Description

technical field [0001] The invention belongs to the technical field of indoor positioning, and in particular relates to an indoor positioning method based on fuzzy theory and multi-sensor fusion. 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. At present, there are mainly two implementation methods for indoor positioning technology. The first method is based on infrared (Infra-Red, IR). The existing problem is that there must be a visible field of view between the transmitter and the receiver; The second is a method based on radio frequency (Radio Frequency, RF). For example, Paschou M proposed ...

Claims

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Application Information

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IPC IPC(8): G01C21/20
CPCG01C21/206
Inventor 李超刘昕陈志高翠彦
Owner BEIJING NAER XINTONG TECH CO LTD
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