Treadmill Gait Analysis with Pressure Sensor Matrix
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Solution Overview
Problem
Existing gait analysis systems can only record a single step and flexing action, failing to capture natural gait behavior over a longer period, which is necessary for accurate analysis and rehabilitation purposes.
Innovation Solution
A treadmill system with an integrated pressure distribution sensor matrix, a computer unit, and display/indication means, including acoustic feedback, allows for prolonged gait recording and analysis, with features like load differentiation between legs, simulated environments, and dynamic surface adjustments to provoke varied footstep patterns, enhancing diagnosis and orthotic insole production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a treadmill system with pressure distribution sensor matrix is used, then the duration of gait recording is improved, but the device complexity increases
Solution Approach 1:
The treadmill belt is divided into multiple segments with pressure sensors distributed across the surface. Each sensor segment independently detects pressure data, which are then aggregated to provide comprehensive gait analysis over extended periods without requiring a single complex monitoring system.
Solution Approach 2:
The treadmill system serves multiple functions: it provides mechanical support for walking/running, integrates pressure distribution sensing across the belt surface, enables prolonged gait recording, and offers real-time feedback. This multi-functionality reduces the need for separate dedicated devices for each function.
2Measurement precision
If pressure distribution sensors are integrated into the treadmill belt, then measurement precision is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The pressure sensing system is segmented into multiple independent sensor elements distributed across the treadmill belt. This segmentation allows each sensor to be manufactured and calibrated separately using standard pressure sensor technology, then integrated into the belt structure in a modular fashion, improving measurement precision while maintaining manufacturing feasibility.
Solution Approach 2:
Different regions of the treadmill belt are equipped with pressure sensors at specific locations corresponding to typical foot contact zones. This localized sensing approach provides high measurement precision where needed without requiring sensors throughout the entire belt structure, simplifying the manufacturing process.
3Adaptability or versatility
If dynamic surface adjustments and simulated environments are implemented, then adaptability is improved, but the device complexity increases
Solution Approach 1:
The treadmill system incorporates dynamically adjustable parameters including belt speed, inclination angle, and surface characteristics. These dynamic adjustments allow the system to adapt to different user needs, rehabilitation stages, and gait analysis requirements, enhancing versatility through programmable control rather than mechanical complexity.
Solution Approach 2:
The system integrates real-time feedback mechanisms where pressure distribution data from the sensor matrix is processed and used to provide information to the user or clinician. This feedback loop enables adaptive adjustment of treadmill parameters based on actual gait patterns, improving adaptability through software-based control.
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
Enables comprehensive and dynamic gait analysis over time, improving diagnosis and rehabilitation by providing feedback and simulating natural walking conditions, thus capturing the full range of gait behaviors and aiding in orthotic development.
Implementation Method 1
an endless belt (2b) drawn over a sensor platform, which is provided with a plurality of pressure and force sensors (3) arranged in a matrix
Data Source
AI summary
A gait analysis system for training or rehabilitation has an endless belt with pressure sensors underneath the belt to sense a person walking on the belt and an analyzing unit for analyzing the gait of the person. The system further includes an image display system with stored data for displaying images to a person using the apparatus training and/or therapy purposes.