Rehabilitation Device Torque Control for Operation Load Reduction
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Solution Overview
Problem
Existing rehabilitation devices do not adequately consider a patient's physical condition, leading to a high operation load during rehabilitation, as they require patients to apply significant force to perform exercises accurately, which can be challenging for those with physical impairments.
Innovation Solution
A rehabilitation device with an operation unit, detection units for movement and force, and a control unit that calculates a target operation amount based on a patient's movement state and a predetermined model, assisting the patient by adjusting torque to reduce the operation load and align with their intended movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the rehabilitation device requires the patient to apply powerful operating force to perform exercises accurately according to the training program, then the exercise accuracy is improved, but the operation load on the patient increases
Solution Approach 1:
The patent introduces a driving unit as an intermediary between the patient's operation and the exercise execution. This driving unit applies torque to the operation unit to assist the patient's movement, reducing the force the patient needs to apply while maintaining exercise accuracy. The control unit coordinates between the patient's input and the driving unit's assistance, ensuring the exercise follows the training program accurately.
Solution Approach 2:
The patent dynamically adjusts the torque applied by the driving unit based on the patient's physical condition and exercise progress. By changing the torque parameter adaptively, the system reduces the operation load on the patient while maintaining the required exercise accuracy. The control unit modifies assistance levels in real-time based on detected movement states.
2Device complexity
If the rehabilitation device does not consider the patient's physical condition, then the device structure is simplified, but the suitability of rehabilitation for the patient's ability deteriorates
Solution Approach 1:
The patent incorporates a movement state detection unit that continuously monitors the patient's physical condition and provides feedback to the control unit. This feedback mechanism enables the system to adapt the exercise parameters and assistance level to the patient's actual ability, improving rehabilitation suitability without significantly complicating the device structure. The control unit uses this information to adjust torque and exercise intensity in real-time.
3Ease of operation
If the rehabilitation device provides assistance to reduce operation load, then the patient's comfort is improved, but the control complexity increases
Solution Approach 1:
The patent implements a control system that automatically adjusts assistance levels based on patient feedback and pre-programmed protocols, reducing the need for manual intervention. The control unit autonomously coordinates the driving unit's torque output based on detected movement states and exercise requirements, improving patient comfort while managing control complexity through automation rather than manual adjustment mechanisms.
Data Source
AI summary
A rehabilitation device includes: an operation unit operated by a patient under rehabilitation; an operation amount detection unit that detects an operation amount of the operation unit; a driving unit that applies torque to the operation unit; a control unit that controls driving of the driving unit; and a movement state detection unit that detects a movement state of a moving part of the patient. The control unit calculates a target value of the operation amount to be performed on the operation unit based on the movement state detected by the movement state detection unit and a predetermined movement model and controls the driving unit so that the operation amount detected by the operation amount detection unit follows the calculated target value of the operation amount.