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Method for estimating step size of personnel based on inertial sensing

An inertial sensing and personnel technology, applied in the direction of measuring devices, instruments, surveying and navigation, etc., can solve the problems that it is difficult to keep the right foot completely still, and the data collected by MEMS is inaccurate, so as to reduce accumulation, improve accuracy and good reliability and stability effects

Inactive Publication Date: 2016-12-14
TIANJIN UNIV
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AI Technical Summary

Problems solved by technology

However, due to the uncertainty of people walking, assuming that MEMS is placed on the heel of the right foot of the person, when the person walks on the left foot, it is difficult to ensure that the right foot is completely still, resulting in inaccurate data collected by MEMS
There are also many researchers who propose to use existing infrastructure (such as: WiFi, RFID, surveillance cameras, etc.) field, etc.) use

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  • Method for estimating step size of personnel based on inertial sensing
  • Method for estimating step size of personnel based on inertial sensing
  • Method for estimating step size of personnel based on inertial sensing

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Embodiment Construction

[0033] In order to further understand the content, features and effects of the present invention, the following will further describe in detail the embodiments of the present invention in conjunction with the accompanying drawings.

[0034] The overall thinking of the present invention mainly lies in the detection of gait and the decomposition and processing of the acceleration signal in the gait cycle, using double zero rate detection points to locate the step length, and improving the accuracy of step length calculation.

[0035] 1. The various steps of the overall flow of a method for estimating personnel steps based on inertial sensing of the present invention are specifically described as follows:

[0036] The MEMS used in the present invention is SPACEPOINT SCOUT produced by PNI Company, which has a built-in three-axis accelerometer, three-axis gyroscope and three-axis magnetometer. Through the research and comparison of different MEMS placement positions, considering th...

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Abstract

The invention discloses a method for estimating step size of personnel based on inertial sensing. The method comprises the steps of: (1), using a micro electro mechanical system to acquire the movement raw data of an indoor personnel; (2), generating a coordinate transformation matrix by using quaternion; (3), dividing the continuous movement into single steps, and calculating the single step length; and (4) accumulating the total displacement to obtain the length of the whole movement. Compared with the prior art, the invention has the advantages of: 1) the cumulative error caused by the quadratic integral of acceleration is avoided, thereby reducing the cumulative error of step calculation; 2) total displacement calculation by single step length accumulation has good reliability and stability; and 3) the accuracy of zero rate correction is improved, thus to improve the accuracy of the step length calculation.

Description

technical field [0001] The invention relates to the technical field of indoor positioning, in particular to a method for calculating the step length of indoor positioning. Background technique [0002] Positioning technology, simply put, is to obtain the location information of objects. With the development of society and the progress of science and technology, people's demand for positioning and navigation in life and work continues to grow. The global satellite positioning system has completed the positioning in the outdoor open environment well; and for the indoor environment and the environment with weak satellite signals, the use of inertial navigation technology can realize the positioning and tracking of personnel. [0003] In recent years, with the continuous improvement of the cost performance of Micro-Electrical-Mechanical Systems (MEMS), Pedestrian Dead Reckoning (PDR) is considered to be one of the most promising personnel positioning technology solutions. PDR ...

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Application Information

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IPC IPC(8): G01C22/00
CPCG01C22/00
Inventor 刘昱郭凯李圣龙
Owner TIANJIN UNIV
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