Method and system for estimating inertial parameters of human body parts

A technology of inertial parameters and human body, which is applied in the field of biomechanics and can solve problems such as inapplicability to other groups and inability to estimate specific individuals.

Active Publication Date: 2010-06-16
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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Problems solved by technology

The regression equation method needs to establish an accurate regression model, which requires a large number of sample data, but most of the samples of this method come from the measurement of n

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  • Method and system for estimating inertial parameters of human body parts
  • Method and system for estimating inertial parameters of human body parts
  • Method and system for estimating inertial parameters of human body parts

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Embodiment Construction

[0055] The specific implementation process of the method of the present invention will be introduced below with reference to the accompanying drawings. figure 1 A diagram for the division of links of the human body model, figure 2 Flow chart for optimal estimation of inertial parameters of human body segments based on motion capture data.

[0056] The invention discloses a method for estimating inertial parameters of human body links based on motion capture data. After obtaining the individual motion capture data and total mass, an optimization method is used to obtain the inertial parameters of the human body link, so that it and the motion capture data satisfy Newton's law of motion as much as possible. Specifically:

[0057] 1) Collect the movement of the individual under test to obtain its motion capture data

[0058] The motion capture technology involved in this step is a mature existing technology, for example, a VICON motion capture device can be used. For related...

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Abstract

The invention relates to a method and system for estimating inertial parameters of human body parts. The estimation method comprises the following steps: 1. acquiring motion capture data of a unity to be tested; 2. measuring the total mass of the unity to be tested; 3. building a manikin for the unity to be tested; and 4. calculating inertial parameters of human body parts according to the motion capture data, total mass and manikin of the unity to be tested. In the invention, a human body density information base does not need to be used, thus being applicable to any nation, gender and group, such as athletes; motion capture data are given, inertial parameters of human body parts can be directly obtained without complex measurement process or manual operation, thereby simplifying the process of estimating inertial parameters of human body parts; while estimating inertial parameters of human body parts, motion capture data are corrected, thereby optimizing inertial parameters and motion data of human body parts, therefore, the invention can be directly used for human body motion analysis.

Description

technical field [0001] The invention relates to the field of biomechanics and computer simulation, in particular to a method and system for estimating inertial parameters of human body links. Background technique [0002] The inertial parameters of the human body link include mass, center of mass and moment of inertia, which are the basic data for establishing a human body model and performing human motion analysis, and its accuracy directly affects the accuracy of motion analysis results. Therefore, the measurement of the inertial parameters of the human body has always been a major basic topic of sports biomechanics, and it is also an important part of ergonomics, anthropology and human science research, with important academic value and application background. Over the years, scientists have explored a variety of methods to measure the inertial parameters of the human body, such as autopsy methods, mechanics-based measurement methods, geometric model methods, medical scan...

Claims

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Application Information

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IPC IPC(8): G01M1/12G01M1/10
Inventor 魏毅赵建军夏时洪王兆其
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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