Speed-Controllable Exerciser Using Induction Motor and Sensor Feedback
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Solution Overview
Problem
Conventional physical exercising machines lack the capability for speed-controllable training due to their high cost and complexity, making them inaccessible for general use beyond professional settings.
Innovation Solution
An exerciser comprising a mechanical unit, a speed-controllable power drive, and an induction control unit, where the induction control unit uses sensors to manage the power drive's operation, allowing for adjustable force application during concentric and eccentric training, enabling speed-controllable exercises at a lower cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional exercising machines use weights, brake means, spring means or damper means to give load, then the structure is simple, but speed-controllable training cannot be achieved
Solution Approach 1:
The patent replaces conventional mechanical load systems (weights, brakes, springs, dampers) with an induction motor-driven system. The induction motor converts electrical energy to mechanical energy, enabling speed-controllable training while maintaining relative structural simplicity through electromagnetic actuation rather than complex mechanical linkages.
Solution Approach 2:
The patent changes the control parameter from fixed mechanical resistance to variable speed control via induction motor. By adjusting the motor speed through electrical control, the system achieves speed-controllable training capability, transforming the training mode from resistance-based to speed-based control.
2Adaptability or versatility
If commercial speed-controllable exercise equipments are designed for professional analysis, then the training function is precise, but the cost becomes expensive
Solution Approach 1:
The patent employs relatively simple and inexpensive components such as induction motors, standard encoders, and basic control circuits to achieve speed-controllable training. This approach replaces expensive professional-grade equipment with more affordable, commercially available components, making the technology accessible for general use rather than仅限于 professional settings.
Solution Approach 2:
The patent designs a universal speed-controllable training system that can accommodate different mechanical units and exercise types. The induction motor-driven architecture provides a platform that can be adapted to various training needs, reducing the need for multiple specialized expensive equipment pieces.
3Measurement precision
If induction control unit uses sensors to manage power drive operation, then speed control precision is improved, but device complexity increases
Solution Approach 1:
The patent implements a feedback control system using encoders to detect the position and speed of the induction motor. The detected signals are fed back to the control unit, which adjusts the motor operation accordingly. This closed-loop feedback mechanism achieves precise speed control while maintaining relatively simple system architecture through straightforward sensor-motor integration.
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
The solution provides a cost-effective means for users to perform speed-controllable training, enhancing the accessibility and practicality of exercises by using a motor and screw mechanism with sensor-controlled induction, allowing for adjustable resistance in both concentric and eccentric muscle contraction directions.
Implementation Method 1
The speed-controllable power drive is drivable by a power source to move the second mechanical member
Data Source
AI summary
An exerciser includes a mechanical unit having a first mechanical member and a second mechanical member operable by one part of the body of a human being, a speed-controllable power drive having a first connection end and a second connection end respectively connected to the first mechanical member and the second mechanical member and being drivable by a power source to move the second mechanical member in making a first action and a second action relative to the first mechanical member, and an induction control unit having a first sensor set installed in the mechanical unit and a second sensor set installed in the speed-controllable power drive for controlling the operation of the speed-controllable power drive. The first sensor set is movable with the mechanical unit relative to the second sensor set between a first position where the induction control unit drives the speed-controllable power drive to move the second mechanical member in making the first action and a second position where the induction control unit drives the speed-controllable power drive to move the second mechanical member in making the second action.