Training Apparatus Position Difference Monitoring
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Solution Overview
Problem
Conventional training apparatuses for rehabilitation of upper and lower limbs cannot accurately distinguish between rapid and slow position differences, leading to inadequate training and inability to monitor load amounts effectively, which limits the quality and efficiency of rehabilitation.
Innovation Solution
A training apparatus equipped with a motor, rotation information detection sensor, tilt angle calculation unit, feedback current detection unit, and determination unit to monitor and control the training rod's position difference and load, allowing for accurate detection of errors and appropriate control of the training process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional training apparatus evaluates position difference based on level of difference between instructed tilt angle and actual tilt angle, then the apparatus can monitor position accuracy, but it cannot distinguish between rapid and slow position differences, leading to inaccurate training evaluation
Solution Approach 1:
The patent segments the position difference evaluation into two distinct components: (1) level of position difference (angular deviation) and (2) temporal change of position difference (rate of change). By using separate evaluation criteria for each component, the system can distinguish between rapid and slow position differences, preventing inaccurate training evaluation while maintaining comprehensive position monitoring.
2Device complexity
If training apparatus uses only level of position difference for evaluation, then the evaluation method is simple, but it cannot provide accurate feedback on load amount and training quality
Solution Approach 1:
The patent implements a dual-feedback evaluation system that provides feedback on both the level of position difference and the temporal change of position difference. This comprehensive feedback mechanism enables accurate monitoring of load amount and training quality without significantly increasing system complexity, as the additional temporal change evaluation builds upon the existing level-based evaluation framework.
3Ease of operation
If conventional apparatus cannot distinguish rapid and slow position differences, then the system is easy to operate, but the user cannot determine the cause of position difference and undergo appropriate training
Solution Approach 1:
The patent introduces dynamic evaluation by incorporating the temporal change of position difference alongside the static level of position difference. This dynamic approach allows the system to automatically identify the cause of position differences (rapid vs. slow changes) and provide targeted feedback, enabling users to undergo appropriate training while maintaining ease of operation through automated analysis.
Data Source
AI summary
A training apparatus includes a fixed frame, an training rod, a motor, a rotation information detection sensor, a tilt angle calculation unit, a feedback current detection unit, a position difference calculation unit, and a determination unit. The training rod tilts with at least one degree of freedom. The motor tilts the training rod. The rotation information detection sensor outputs an amount of rotation of the motor. The tilt angle calculation unit calculates a tilt angle. The feedback current detection unit detects a feedback current value. The position difference calculation unit calculates a position difference every time when a first time period elapses. The determination unit determines an error when the position difference generated during the first time period is a first threshold or higher, or when the feedback current value keeps a first current value or higher for a second time period or longer.