Gait Motion Display System Using Accelerometer Displacement
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Solution Overview
Problem
Conventional methods for displaying gait motions are burdensome for observers and require complex device structures, limiting effective coaching without skilled observers, and are inconvenient due to the need for multiple markers and cameras.
Innovation Solution
A gait motion display system using a triaxial accelerometer to measure acceleration data, an imaging unit to capture walking images, a recording unit to synchronize data, and an identification unit to convert acceleration data into displacement data for identifying representative gait cycle images, displayed alongside the corresponding images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an observer extracts predetermined images from moving image data to display gait motions, then gait motion coaching can be provided, but a great burden is placed on the observer and skilled observers are required
Solution Approach 1:
The system performs automatic image extraction and processing without requiring manual intervention by observers. The control unit automatically identifies representative images from the moving image data based on acceleration data, eliminating the burden on observers and removing the need for skilled personnel to manually extract images for gait motion display
Solution Approach 2:
The manual mechanical process of image extraction by observers is replaced with an automated electronic system. The control unit uses acceleration data to automatically determine and extract representative images, substituting human observation and manual extraction with automated computational processing
2Measurement precision
If multiple markers and cameras are used to analyze gait motions, then three-dimensional motion analysis can be performed, but the device structure becomes complicated
Solution Approach 1:
The system extracts and uses only the necessary acceleration data from the moving image data, eliminating the need for complex multi-camera setups and multiple markers. By focusing on key acceleration parameters that represent gait motions, the system achieves effective measurement with simplified device structure
Solution Approach 2:
The single accelerometer attached to the subject serves multiple functions: it measures acceleration data, provides timing information for image extraction, and enables representation of three-dimensional gait motions through processed acceleration signals, replacing the need for multiple specialized devices
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Provides a convenient and simple structure for displaying gait motions, allowing for effective coaching without a skilled observer, by converting acceleration data into displacement data for easy identification and display of representative images, facilitating proper gait motion analysis.
Implementation Method 1
a triaxial accelerometer that measures acceleration data of a subject in walking
Data Source
AI summary
A gait motion display system including: a triaxial accelerometer, attached to the subject, that measures acceleration data of a subject in walking; an imaging unit that takes images of the subject in walking to obtain moving image data showing gait motions of the subject; a recording unit that records the acceleration data and the moving image data in synchronization with each other; an identification unit that converts the acceleration data recorded by the recording unit into horizontal displacement data and vertical displacement data, and identifies, from the moving image data, a representative image corresponding to a representative motion in a gait cycle, based on the horizontal displacement data or the vertical displacement data; and a display that displays an image illustration of the representative motion in the gait cycle, with the representative image identified by the identification unit.