Independent Footrest Motion for Lower-Leg Balance Disorder Detection
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Solution Overview
Problem
Existing systems fail to effectively detect physical disorders related to left/right balance in users, particularly through assessing asymmetrical movements and kinematic chains during exercises.
Innovation Solution
A disorder detection system comprising left and right footrests with independent sliding mechanisms, resistance parts, and angle detection units to measure joint angles around roll, yaw, and pitch axes, with a display unit for comparative analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a user performs leg exercises on a fixed exercise device, then the exercise function is provided, but the system cannot detect left/right balance disorders or asymmetrical movements
Solution Approach 1:
The patent replaces complex mechanical measurement systems with sensor-based detection. Angle detection units (sensors) are attached to the user's lower legs to directly measure joint angles around roll, yaw, and pitch axes, eliminating the need for complex mechanical linkages and markers while achieving precise measurement of asymmetrical movements during exercise
Solution Approach 2:
The patent introduces angle detection units as intermediary sensors that measure joint angles without interfering with the user's natural exercise movements. These sensors act as mediators between the user's body movements and the detection system, enabling accurate measurement of left/right balance disorders while maintaining exercise freedom
2Measurement precision
If the system monitors only overall exercise performance, then the exercise feedback is simple, but it cannot identify specific joint angle asymmetries indicating physical disorders
Solution Approach 1:
The patent segments the measurement task by separately measuring joint angles around three different axes (roll, yaw, pitch) for both left and right lower legs. This segmentation allows comprehensive detection of asymmetrical movements in multiple planes while organizing complex data into manageable components that can be analyzed independently and comparatively
3Adaptability or versatility
If the footrests are fixed in position, then the exercise apparatus is simple, but it cannot independently assess left and right lower leg movements
Solution Approach 1:
The patent transforms fixed footrests into dynamically movable footrests that can slide independently in the front/rear direction. This dynamic design allows each footrest to move according to the user's individual leg movements, enabling independent assessment of left and right lower leg exercises while maintaining a relatively simple slide mechanism structure
Data Source
AI summary
A disorder detection system includes: a pair of left and right footrests configured so that left and right feet of a user are respectively placed thereon to perform an exercise of legs therewith; a pair of left and right slide mechanisms for enabling the footrests to slide in a front/rear direction with respect to a sitting part, the slide mechanisms including a resistance part for applying a resistance to the sliding; a moving mechanism for enabling the left and right slide mechanisms and the footrests to move independently of each other; an angle detection unit for detecting angles of joints of left and right lower legs of the user around a roll axis, a yaw axis, and a pitch axis; and a display unit for displaying the detected angles of the joints of the left and right lower legs of the user around the roll, yaw, and pitch axes.