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A Real-time Step Size Estimation Method Based on Acceleration Sensor

A technology of acceleration sensor and step size estimation, which is applied in the direction of instruments, measuring devices, surveying and mapping, and navigation, etc., and can solve the problem of fewer smart phones

Inactive Publication Date: 2017-06-06
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on indoor positioning and walking calculation of inertial navigation has achieved certain results. However, these research results are mainly aimed at high-precision sensing units, and there are still relatively few solutions for using smart phones to complete real-time step calculation.

Method used

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  • A Real-time Step Size Estimation Method Based on Acceleration Sensor
  • A Real-time Step Size Estimation Method Based on Acceleration Sensor
  • A Real-time Step Size Estimation Method Based on Acceleration Sensor

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Experimental program
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Effect test

Embodiment

[0091] Such as image 3 As shown, it is a flow chart of the real-time calculation system for the user's step size, and the specific steps include:

[0092] 1. Data preprocessing;

[0093] For the user’s real-time walking acceleration information collected by the acceleration sensor, in order to realize automatic processing, the 2800th to 4500th points in the middle of the collected acceleration data are automatically selected in the preprocessing program to avoid possible errors at the beginning and later data. Since the acceleration data of a single acceleration axis cannot guarantee a good periodicity every time, the processing method of three-week combined force peak detection is adopted. In addition, since the periodic effect of acceleration when people walk is very poor, it is necessary to filter and smooth the data first, and the processing steps are as follows:

[0094] (1) Remove additional noise interference with Gaussian filter;

[0095] (2) Use a 16-point slidin...

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Abstract

The invention provides a real-time step length estimation method based on an acceleration sensor. The real-time step length estimation method comprises the following steps: 1, a peak detection method based on slope computation and acceleration values; 2, step frequency calculation: calculating and storing the number of sampling points between two adjacent peak values, ordering, then calculating an average value in a manner of respectively taking 1 / 4 data from the middle to both sides, taking the average value as the number of sampling points in the time of walking one step, and calculating out the step frequency by combining the number of sampling points with the sampling frequency of the acceleration sensor; and 3, estimating based on a multivariate regression model. The method has the advantages of simple and convenient estimation and the like.

Description

technical field [0001] The invention relates to a technology for estimating real-time step length, in particular to a method for estimating real-time step size based on an acceleration sensor. Background technique [0002] Since the US Global Positioning System (GPS) was developed in the 1970s and fully completed in 1994, it has played an inestimable role in the civilian market, military and government navigation services. As an important means of civil navigation and positioning, it is widely used in geodetic survey, emergency rescue, logistics industry, intelligent transportation, personal navigation and positioning and other fields. However, although GPS is the most common way to obtain location information, because satellite signals are easily blocked by obstacles, GPS is not suitable for indoor occasions and some outdoor occasions with relatively high obstructions. Today, with the popularity of smart phones, it is not uncommon to use various sensors integrated in mobil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C22/00
CPCG01C22/006
Inventor 薛洋刘龙坡金连文
Owner SOUTH CHINA UNIV OF TECH