Electromagnetic Powder Clutch for Athlete Training Force Control
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Solution Overview
Problem
Existing sports training devices lack reliability, variability, and precision in transmitting force to athletes, leading to injuries, inefficient energy use, and inability to manage ultrashort fluctuations in exertion.
Innovation Solution
A device with a controllable electromagnetic powder clutch transmission system that regulates force and speed, allowing precise control of exertion on athletes, featuring a shaft with a regulated transmission and ferromagnetic powder viscosity control for accurate and safe training.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional transmission system is used to transmit force from the engine to the athlete, then the structure is simple, but the reliability is insufficient and ultrashort fluctuations cannot be leveled
Solution Approach 1:
Ferromagnetic powder is introduced as an intermediary substance between the driving and driven parts of the clutch. This powder mediates the force transmission through magnetic interactions, enabling reliable force transmission while smoothing ultrashort fluctuations (0.3-0.7s) that traditional mechanical transmissions cannot handle. The powder acts as a buffer that absorbs and redistributes force variations.
Solution Approach 2:
The patent replaces traditional mechanical transmission components with an electromagnetic powder clutch system. Instead of using gears, belts, or chains, the force transmission is achieved through electromagnetic fields acting on ferromagnetic powder particles. This substitution enables precise control of force magnitude and direction while improving reliability and smoothing fluctuations.
2Adaptability or versatility
If the force transmission system lacks regulation capability, then the device structure is simple, but the variability and precision of force application is insufficient
Solution Approach 1:
The patent enables continuous regulation of force transmission parameters including magnitude (0-150 kg at 0.1-0.3 kg steps), direction, and application timing. By controlling the electromagnetic field strength and powder distribution, the system can adapt force characteristics to match individual athlete requirements and specific training objectives, achieving high variability without complex mechanical regulation mechanisms.
Solution Approach 2:
The transmission system is designed to be dynamically adjustable during operation. The electromagnetic powder clutch can instantly change force parameters in response to real-time training conditions, athlete performance, and safety requirements. This dynamic capability allows the same device to serve multiple training purposes with different force characteristics.
3Measurement precision
If precise force control is implemented, then training accuracy is improved, but the risk of injury from improper force application remains
Solution Approach 1:
The system incorporates feedback mechanisms that continuously monitor force application and athlete response. Based on this feedback, the control system automatically adjusts force magnitude and timing to remain within safe limits while maximizing training effectiveness. The feedback loop ensures that precise force control does not lead to injury by constantly verifying that applied forces are appropriate.
Solution Approach 2:
The ferromagnetic powder clutch inherently provides cushioning effects by absorbing and redistributing force variations before they reach the athlete. This prior cushioning protects against sudden force spikes or improper force application that could cause injury, while still maintaining precise control over the intended training stimulus.
4Stability of the object's composition
If traditional force transmission methods are used, then the device is simple to operate, but ultrashort fluctuations (0.3-0.7 s) cannot be leveled
Solution Approach 1:
Ferromagnetic powder serves as a mediator that naturally smooths ultrashort fluctuations in force application. The powder particles interact through magnetic fields in a way that absorbs high-frequency variations (0.3-0.7s), providing stable force transmission without requiring complex active control systems or sensors.
Solution Approach 2:
The system changes the physical state and distribution parameters of the ferromagnetic powder to optimize force smoothing. By controlling powder density, distribution, and magnetic saturation levels, the system achieves stable force application that automatically levels ultrashort fluctuations while maintaining responsiveness to intentional force variations.
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
Enhances training precision, reduces injury risk, and optimizes energy use by enabling accurate and variable force application, compensating for ultrashort fluctuations and allowing remote control and networked operation.
Implementation Method 1
The regulated transmission is an electromagnetic powder clutch, which consists of a driving part attached to the driving part of the shaft and a driven part attached to the driven part of the shaft
Implementation Method 2
In the clearance, between the driving part and driven part of the clutch there is ferromagnetic powder
Implementation Method 3
An annular groove of the driven part contains an exciting winding connected to a source of direct current via contact rings and brushes
Data Source
AI summary
The present device is designed for training of highly-qualified athletes in cyclic sports. The technical result is the more reliable transfer of power from a drive to a working mechanism with the possibility of smoothing out ultrashort fluctuations (0.3-0.7 seconds) in force. The athlete training device comprises two bases, each having a pulley attached thereto for rotation in a single plane. An annular cable track is fastened between the pulleys. With the aid of a motor, a rotation rate is transmitted to one of the pulleys via a shaft. The shaft, which consists of a driving part and a driven part, has mounted thereon an adjustable transmission for controlling torque. The adjustable transmission is in the form of an electromagnetic powder clutch, consisting of a driving part, connected to the driving part of the shaft, and a driven part, connected to the driven part of the shaft. The driven part of the clutch is mounted with clearance in a coaxial cavity in the driving part, the clearance gap between the driving part and the driven part of the clutch containing a ferromagnetic powder having viscosity adjusted by a clutch controller.