Torque Detection Device Using Magnetoresistance and Steel Cable Actuation
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Solution Overview
Problem
Conventional torque detection devices in fitness equipment are prone to abrasion and inaccurate torque detection over time due to manual adjustment, which affects the reliability of resistance exertion on flywheels.
Innovation Solution
A torque detection device utilizing a steel cable to actuate a magnet holder, changing the position of magnets relative to the flywheel and altering magnetoresistance, coupled with a loading sensor to detect reaction forces and calculate torque values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual adjustment mechanism is used for torque detection device, then ease of operation is improved, but reliability deteriorates due to abrasion and inaccurate detection after prolonged use
Solution Approach 1:
The patent replaces the manual mechanical adjustment mechanism with an automated magnetic resistance system. The magnet holder rotates to change the distance between magnets and flywheel, automatically adjusting torque without manual contact. This eliminates mechanical wear from manual adjustment while maintaining ease of operation through automated control.
Solution Approach 2:
The loading sensor automatically detects the reaction force from the magnetic resistance mechanism and calculates torque values without requiring manual intervention. The system self-adjusts and self-measures, eliminating the need for manual operation that causes wear while maintaining operational ease through automated functionality.
2Ease of operation
If manual contact adjustment is used, then ease of operation is improved, but manufacturing precision deteriorates due to inaccurate torque detection
Solution Approach 1:
The patent replaces manual mechanical adjustment with an automated magnetic resistance system controlled by a magnet holder rotation mechanism. This eliminates the imprecision of manual contact adjustment while maintaining full adjustability through automated magnetic field modulation, achieving both ease of operation and high precision.
Solution Approach 2:
The loading sensor provides real-time feedback on the reaction force from the magnetic resistance mechanism, enabling precise torque detection and calculation. This feedback loop ensures accurate torque values are maintained while the system remains easily adjustable through automated control, eliminating the precision loss from manual adjustment.
3Reliability
If automated magnet holder rotation is used, then reliability is improved by reducing manual intervention, but device complexity increases
Solution Approach 1:
The patent replaces complex manual adjustment mechanisms with a streamlined automated magnetic resistance system. The magnet holder rotation mechanism, controlled through automated means, simplifies the overall structure by eliminating manual contact components while improving reliability through consistent automated operation and precise sensor-based torque detection.
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
This solution provides a reliable and accurate method for calculating torque values by minimizing manual intervention and reducing wear, ensuring precise resistance adjustment and extended device lifespan.
Implementation Method 1
a steel cable is configured to actuate a magnet holder to rotate so that an area of the respective one magnet of multiple magnets which covers the flywheel is changed, thus changing a magnetoresistance of the respective one magnet of the magnet holder
Implementation Method 2
a loading sensor is configured to detect a reaction force of a magnetoresistance mechanism so as to calculate a torque value of the flywheel
Data Source
AI summary
A torque detection device of fitness equipment, the fitness equipment contains: a frame, a flywheel rotatably connected on the frame, and the torque detection device. The torque detection device includes a loading sensor and a magnetoresistance mechanism. A magnet holder of the magnetoresistance mechanism is rotatably connected on a fixer by way of a rotary shaft and has multiple magnets. A steel cable is configured to actuate a magnet holder to rotate along the rotary shaft so as to change a position of a respective one magnet of multiple magnets relative to a flywheel, and an area of the respective one magnet which covers the flywheel is changeable, thus changing a magnetoresistance of the respective one magnet of the magnet holder when the flywheel rotates. The loading sensor is configured to detect a reaction force of a magnetoresistance mechanism so as to calculate a torque value of the flywheel.