Gait space-time parameter calculation method based on portable gait analysis system

Abstract

The invention provides a gait space-time parameter calculation method based on a portable gait analysis system. The gait space-time parameter calculation method comprises the steps of time parameter calculation and space parameter calculation. The method integrates the two types of parameter calculation and a detection method to make their respective advantages complementary to each other and hasthe advantages of eliminating MEMS IMU sensor data, obtaining speed and position information including errors accumulated over time through integration and operation, improving the accuracy of gait parameter calculation, and meanwhile solving the problem that a plantar pressure analysis method cannot calculate gait space parameter such as stride, walking distance and walking speed.

Description

technical field [0001] The invention belongs to the technical field of gait analysis, in particular to a calculation method of gait space-time parameters based on a portable gait analysis system. Background technique [0002] Gait analysis (gait analysis) is a technology that obtains and analyzes gait parameters by observing or collecting the posture of the human body during walking. Common gait parameters include spatial parameters (stride length, step length, step width, etc.), Time parameters (standing / swing period, single step time, stride frequency, etc.), and the symmetry of the left and right feet of these parameters, the stability of long-term data, etc. Gait analysis plays a very important role in sports, medical rehabilitation, etc., and has been widely used and studied. Traditional gait analysis equipment and methods are generally three-dimensional gait analysis instruments used in large hospitals and rehabilitation centers. Such equipment has the following disad...

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Problems solved by technology

[0006] The present invention provides a calculation method based on the gait spatio-temporal parameters of the portable gait analysis system to solve the unavoidable problem in the prior art proposed in the background art: the MEMS IMU sensor itself has unavoidable error factors that lead to the use of integral The speed and position information obtained by the sum operation contains errors accumulated over time, which will directly affect the accuracy of gait parameter calculation. Most of the existing plantar pressure analysis is to deal with the static pressure distribution map generated by multiple fitting and superposition. Or pressure center transfer map, this detection method can also detect and calculate gait time parameters, but cannot calculate gait space parameters, such as stride length, walking distance, walking speed, etc.

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