System and method for determining the activity of a mobile element

A technology of elements and activities, applied in applications, character and pattern recognition, medical science, etc., can solve problems such as limited accuracy

Inactive Publication Date: 2012-05-02
ATOMIC & AUXILIARY ALTERNATIVE ENERGY COMMISSION +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the accuracy of these systems and methods is limited

Method used

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  • System and method for determining the activity of a mobile element
  • System and method for determining the activity of a mobile element
  • System and method for determining the activity of a mobile element

Examples

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Embodiment Construction

[0058] Figure 1 shows a system for determining the activity of a mobile element EM such as a living being, said system comprising at least one motion sensor CM within a casing BT, the motion sensor CM having at least one measuring axis, the motion The sensor CM is equipped with a fixing module comprising, for example, elastic elements for securely attaching the motion sensor CM to the mobile element EM by means of a packing sleeve BT. The motion sensor CM can be an accelerometer, a magnetometer or a gyrometer with one, two or three measurement axes.

[0059] The system comprises a filter FILT for selecting a high frequency above a threshold S for each measuring axis of the motion sensor CM. The system also comprises a unit DET for determining a one-dimensional high frequency component HF equal to the Euclidean norm of said high frequency along the considered measurement axis of the motion sensor CM square; and a unit CALC for calculating the probability of said high-frequency...

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Abstract

The invention relates to a system for determining the activity of a mobile element (EM), including at least one motion sensor (CM) with at least one measurement axis, provided with an attachment means (MF) for rigidly connecting said motion sensor (CM) to said mobile element (EM), including: a filter (FILT) for selecting, for every measurement axis of the motion sensor, high frequencies above a first threshold (S1); a means (DET) for determining a one-dimensional high-frequency component (y(n)) equal to the square of the Euclidean norm of said high frequencies of the measurement axes taken into account by said motion sensor (CM); a means (CALC) for calculating, for every state, probability density functions (Py, i) of said high-frequency component (HF), said probability density function corresponding to each state according to a chi-square distribution of a degree of freedom equal to the number of measurement axes taken into account by the motion sensor (CM); and an analysis means suitable for defining states of the mobile element, said analysis means combines the probability density function of said high-frequency component for each state with the probability of changing between two consecutive states.

Description

technical field [0001] The present invention relates to a system and method for determining the activity of mobile elements. Background technique [0002] Systems and methods for analyzing motion based on hidden Markov models are known, such as, for example, in the literature "Gesture recognition using the XWand" (by Daniel Wilson and Andy Wilson) and "Motion-based gesture system and method described in "Recognition with an accelerometer" (Bachelor Thesis) (by P.V. Borza). [0003] The paper "A hidden Markov model-based stride segmentation technique applied to equine inertial sensor trunk movement data" (Journal of Biomechanics 41 (2008) 216-220 by Thilo Pfau, Marta Ferrari, Kevin Parsons and Alan Wilson) deals with the analysis of horseback riding. [0004] However, the accuracy of these systems and methods is limited. Contents of the invention [0005] An object of the invention is to improve the accuracy of determining the activity of moving elements, especially for l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/11G06F17/18G06K9/62
CPCG06K9/6297A61B5/1101A61B2562/0219A61B5/1116A61B5/11G06F18/295G06F17/18
Inventor P·雅隆
Owner ATOMIC & AUXILIARY ALTERNATIVE ENERGY COMMISSION
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