Dynamic Reference Center of Gravity Balance Training System
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Solution Overview
Problem
Existing rehabilitation support devices fail to accurately control the movement of a force plate in response to changes in the standing position of a subject during balance training, leading to a deviation between the actual and theoretical center of gravity positions, which hampers effective balance training.
Innovation Solution
A balance training system equipped with a load distribution sensor matrix on a mounting surface to detect foot positions and load, a control unit to calculate and update the reference position based on foot position changes, and a mobile body (such as a treadmill belt or carriage) that adjusts its movement accordingly to align with the changing center of gravity position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only load detection is used to control force plate movement, then the system structure remains simple, but the reference center of gravity position becomes inaccurate when standing position changes
Solution Approach 1:
The patent combines load detection sensors with position detection sensors (such as cameras or optical sensors) to create an integrated detection system. This merging allows the system to simultaneously acquire both load information and standing position information, enabling accurate calculation of the reference center of gravity position even when the subject changes their standing position during training.
Solution Approach 2:
The patent introduces a position detection sensor as an intermediary element that bridges the gap between the subject's standing position and the force plate's movement control. This intermediary sensor provides additional position data that helps correct the reference center of gravity position calculation, ensuring accuracy without significantly complicating the overall system architecture.
2Device complexity
If the reference center of gravity position is fixed at the initial setting, then the control system remains simple, but effective balance training cannot be performed when standing position changes
Solution Approach 1:
The patent implements a dynamic reference center of gravity position that automatically updates based on real-time detection of the subject's standing position. Instead of using a fixed reference point, the system continuously adjusts the reference position to match the subject's current stance, enabling effective balance training even when the subject shifts their weight or changes their standing position during the exercise.
Solution Approach 2:
The patent incorporates a feedback mechanism where position detection sensors continuously monitor the subject's standing position and provide this information back to the control system. The control system then uses this feedback to update the reference center of gravity position in real-time, ensuring that the force plate movement remains accurately correlated with the subject's actual center of gravity position throughout the training session.
3Measurement precision
If load distribution sensor matrix is added to detect foot positions, then standing position detection accuracy improves, but device complexity increases
Solution Approach 1:
The patent divides the detection function into multiple segments: load detection sensors distributed across the force plate surface and position detection sensors (such as cameras or optical sensors) positioned separately. This segmentation allows each sensor type to specialize in its specific measurement function, achieving high precision in both load and position detection while maintaining modular system architecture that simplifies overall complexity management.
Data Source
AI summary
A balance training system includes a load distribution sensor a mobile body, to which the load distribution sensor is attached to the mobile body, and a control unit configured to calculate a reference position based on the positions of the feet of a trainee detected by the load distribution sensor, then calculate a center of gravity position of the trainee based on the load detected by the load distribution sensor, and control a movement of the mobile body based on a change of the center of gravity position with respect to the reference position. The control unit is configured to update the reference position based on the changed positions of the feet of the trainee when the change of the position of at least one of the feet of the trainee is detected by the load distribution sensor.