Exercise Bike Magnetic Resistance With Sensor Feedback
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Solution Overview
Problem
Existing exercise bikes lack a cost-effective resistance device that provides accurate resistance control and real riding experience while collecting precise riding data, with high-end devices being excessively expensive.
Innovation Solution
A resistance apparatus utilizing a conductor and magnets, controlled by a motor and sensors, adjusts resistance by varying the position of magnets relative to the conductor, integrating a torque and speed sensor for precise resistance calculation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electromagnetic resistance devices and electrical motors are used, then resistance control precision and riding experience are improved, but device cost increases significantly
Solution Approach 1:
The patent replaces complex electromagnetic resistance devices with a simpler magnetic field-based resistance mechanism. Instead of using electrical motors and electromagnetic brakes, the system uses permanent magnets positioned at different radial distances from the conductor to create variable magnetic fields that generate resistance through eddy currents, achieving precise resistance control at lower cost
Solution Approach 2:
The patent achieves resistance variation by changing the radial position of permanent magnets relative to the conductor. By moving magnets along the radial direction from 100% overlap with the brake disk to 100% out of the brake disk, the magnetic field strength and resistance are precisely controlled through a single geometric parameter change
2Ease of manufacture
If manual control resistance devices are used, then device cost is reduced, but resistance precision and data accuracy deteriorate
Solution Approach 1:
The patent incorporates speed sensors and torque sensors that continuously monitor the conductor's rotational speed and the resistance force, respectively. This feedback data is processed by a controller to calculate power output and adjust magnet positions in real-time, achieving automated precise control without manual intervention while maintaining cost-effectiveness
Solution Approach 2:
The patent replaces manual resistance adjustment mechanisms with an automated motor-driven magnet positioning system. The motor precisely controls magnet radial positions based on sensor feedback, eliminating manual control limitations while keeping the overall system more affordable than high-end electromagnetic devices
3Device complexity
If simple magnet resistance devices are used, then device complexity is reduced, but riding experience and data collection capability deteriorate
Solution Approach 1:
The patent creates a multi-functional resistance system where the same magnetic field-based mechanism serves multiple purposes: providing variable resistance, collecting precise riding data through integrated sensors, and enabling programmable control. The system combines the simplicity of magnetic resistance with the data collection and control capabilities of high-end devices
Solution Approach 2:
The patent integrates speed sensors and torque sensors that work with the magnetic resistance mechanism to provide real-time feedback on riding parameters. This enables the system to not only provide resistance but also accurately measure and record riding data, enhancing the riding experience without significantly increasing complexity
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 apparatus offers precise resistance control and accurate data collection at a lower cost, balancing the functionality of high-end devices without the high price, enhancing the riding experience.
Implementation Method 1
A magnet holding assembly for holding one or more magnets can be positioned proximate to the conductor. A drive motor can be configured to move the magnet holding assembly from a first position to a second position along a second axis (Y). As the magnet holding assembly is moved along the second axis, the magnets position relative to the conductor changes which can affect the amount of resistance.
Implementation Method 2
The apparatus of the present disclosure can precisely control the movement of the all magnets along the radial direction of the brake disk from 100% overlap with the brake disk to 100% out of the brake disk, in this way it provides a much better way to calculate the resistance according to the relative position of the magnets and the brake disk.
Data Source
AI summary
A resistance device for exercise bike and bike trainer wherein the resistance is generated and adjusted by the rotation of a conductor and movement of one or a group of permanent magnets proximate to the conductor. The resistance training apparatus of the present disclosure can include a housing, a controller that connects to a computer, one or more sensors, a conductor/brake disk configured to rotate around a first axis, a magnet holding assembly for holding one or more magnets, a drive motor that is controlled by the electronic board to precisely move the magnet holding assembly form a first position to a second position along a second axis, wherein resistance is generated and adjusted by the rotation of conductor/brake disk and the position of the one or more magnets relative to the conductor as the magnetic holding assembly moves along the second axis.