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A method for determining mid-stance stance based on kinematic data

A technology of data determination and kinematics, applied in medical science, diagnosis, diagnostic recording/measurement, etc., can solve the problems of not conforming to the original definition and large errors, and achieve the effect of convenient calculation, reliable principle and high precision

Active Publication Date: 2020-07-24
TIANJIN UNIV
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Problems solved by technology

However, in actual operation, it is found that its error is large, and it does not meet its original definition

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  • A method for determining mid-stance stance based on kinematic data
  • A method for determining mid-stance stance based on kinematic data
  • A method for determining mid-stance stance based on kinematic data

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Embodiment Construction

[0029] A method for determining mid-stance gait based on kinematics data of the present invention will be described in detail below with reference to embodiments and drawings.

[0030] A method for determining mid-stance gait based on kinematic data of the present invention is as follows: first extract the collected right anterior superior iliac spine (RASIS), left anterior superior iliac spine (LASIS), right posterior superior iliac spine ( RPSIS), left posterior superior iliac spine (LPSIS), right lateral malleolus tip (RLeral Malleolus) and left lateral malleolus tip (LLeral Malleolus) 3D motion capture data, followed by estimation based on four marker points at the iliac crest The three-dimensional coordinates of the human center of mass (CoM), and then calculate the instantaneous velocity vCoM of the human body center of mass and its ground projection vCoMProjection, and finally connect the CoM and the tip of the lateral malleolus, and determine that the ground projection ...

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Abstract

Provided is a method for determining the standing middle stage of gaits based on kinematic data. The method includes the steps of extracting the three-dimensional position coordinates of six parts ofthe pelvis and feet of a walking human body; estimating the three-dimensional position coordinates of the mass center of the walking human body; calculating the speed of the mass center of the walkinghuman body; determining the standing middle stage of the gaits. According to the method for determining the standing middle stage of the gaits based on kinematic data, a reasonable simplified methodis used, the moment of the standing middle stage is approached through an included angle, rigorous mathematical operation is conducted, and the key event of the standing middle stage of the gaits is determined relatively accurately. The method is reliable in principle, convenient and fast to calculate, simple to carry out and high in accuracy, and therefore foundations are laid for further analysis of internal and external stability, gait feature extraction, biomechanical calculation and the like. Compared with traditional methods, the technology better satisfies a definition and is more accurate.

Description

technical field [0001] The invention relates to a method for determining the mid-stance stage of gait. In particular it relates to a method for determining the mid-stance phase of gait based on kinematic data. Background technique [0002] Gait is a behavioral characteristic of human walking, and normal gait has obvious periodicity. The gait cycle is usually divided into weight-bearing response phases using seven major events: first touchdown, contralateral toe-off, heel lift, contralateral first touchdown, toe-off, two-foot proximity, and tibial vertical. There are seven stages: mid-stance, end-stance, early-swing, early-swing, mid-swing, and end-swing. [0003] Human walking is often simplified as an inverted pendulum model, that is, assuming that the center of mass (CoM) of the human body remains unchanged relative to the human body, it performs a single pendulum motion around the ankle joint on the supporting side. The pendulum length was estimated using the distance ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/11
CPCA61B5/112
Inventor 明东何川徐瑞蒋晟龙张力新倪广健
Owner TIANJIN UNIV
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