Exercise Assistance Apparatus Acceleration Control
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Solution Overview
Problem
Conventional weight training technologies using electric assistance struggle with smooth and natural assistance due to constant load removal based on position or velocity detection, leading to slow reaction speeds and inaccurate control, and fail to consider reaction forces and friction, resulting in decreased effectiveness.
Innovation Solution
An exercise assistance apparatus with a mounting unit, power transmission unit, and exercise assistance unit that includes load detection members and a microcomputer to calculate assistance time and strength based on real-time load values, using a ball screw mechanism and encoder signals for precise control, allowing for natural weight training without a coach.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If load removal quantity is calculated based on position or velocity feedback, then the control system can determine when to remove load, but the reaction speed is slow and the exercise cannot be assisted naturally
Solution Approach 1:
The patent replaces position/velocity-based feedback control with acceleration-based control. The acceleration calculation unit computes acceleration from position data, and the control unit uses this acceleration information to determine load removal timing, achieving faster reaction speed that matches the natural dynamics of exercise movement.
Solution Approach 2:
The patent changes the control parameter from position/velocity to acceleration. By calculating acceleration (second derivative of position) and using it as the basis for load removal decisions, the system achieves faster response that naturally assists exercise movement rather than creating artificial delays.
2Measurement precision
If sensor is installed at the rod, then precise control can be achieved, but additional communication system is needed
Solution Approach 1:
The patent combines the sensor installation location with the existing rod structure. The sensor is mounted directly on the rod, and the control unit processes the signal locally, merging the detection and control functions into a single integrated system without requiring separate communication infrastructure.
3Ease of manufacture
If conventional simple algorithm is used with external sensors, then the system is easy to implement, but reaction force and friction force are not considered resulting in decreased training effectiveness
Solution Approach 1:
The patent implements a feedback control system where the control unit receives position data, calculates acceleration, determines external force requirements, and adjusts load removal timing accordingly. This closed-loop feedback ensures that reaction forces and friction are automatically compensated, maintaining training effectiveness without requiring complex manual algorithms.
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 accurate and natural weight training by reducing personnel expenses and providing high-value, competitive fitness equipment that optimizes component design for improved assistance and effectiveness.
Implementation Method 1
a ball screw extending in a first direction and a ball screw nut moving in the first direction or an opposite direction of the first direction by the power of the motor transmitted by the ball screw
Implementation Method 2
The microcomputer calculates a calculated value of an exercise assistance time and an exercise assistance strength based on an encoder signal transmitted from a driving portion of the power transmission unit
Implementation Method 3
The at least one load detection member detects a load applied at an upper portion
Data Source
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AI summary
An exercise assistance apparatus includes a mounting unit, a power transmission unit, and an exercise assistance unit. The mounting unit is capable of detaching from a first direction frame of a weight training rack. The mounting unit is mounted on the first direction frame in parallel. The power transmission unit generates a power and transmitting the power. The power transmission unit is arranged at the mounting unit. The exercise assistance unit is coupled movably to the power transmission unit. The exercise assistance unit receives the power and exerting an external force on an exercise assistance and an exercise. The exercise assistance unit includes a housing case, at least one load detection member, a cover member and a microcomputer. The microcomputer calculates an external force value of the power transmission unit based on the calculated value and transmitting a control signal to the power transmission unit based on the external force value.