Disc Brake Rotor Adapter With Magnetic Wheel Rotation Sensing
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Solution Overview
Problem
Current techniques for detecting the rotational state of a bicycle wheel are inadequate, as they rely on sensors that detect magnets on the wheel spokes, which may not provide reliable data due to interference or wear.
Innovation Solution
A disc brake rotor adapter equipped with a magnetism generation device, comprising a magnetism generation portion and a holder, is attached to the bicycle hub, allowing for the detection of the rotational state by generating a magnetic field that is securely fastened to the adapter, enhancing reliability and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sensor detects a magnet attached to a spoke of a wheel to detect the rotational state of the wheel, then the rotational state can be detected, but the detection reliability deteriorates due to interference or wear
Solution Approach 1:
The patent introduces a magnetism generation device as an intermediary component that creates a magnetic field to interact with the sensor. Instead of directly detecting a magnet on the spoke, the sensor detects magnetic field changes generated by the magnetism generation device attached to the disc brake rotor adapter, which rotates with the wheel. This intermediary magnetic field approach eliminates direct contact and wear issues between sensor and magnet.
Solution Approach 2:
The patent replaces the mechanical attachment of a magnet to the wheel spoke with a magnetic field-based detection system. The magnetism generation device generates a magnetic field that varies as it rotates, and this magnetic field variation is detected by the sensor, substituting the need for direct mechanical magnet attachment and reducing wear and interference problems.
2Reliability
If the magnetism generation device is securely fastened to the adapter, then the reliability and durability of the detection system improve, but the device complexity increases
Solution Approach 1:
The patent merges the magnetism generation device with the disc brake rotor adapter by integrating the mounting function directly into the adapter structure. The adapter includes integrated mounting features that combine the structural support and fastening functions, eliminating the need for separate complex attachment mechanisms while ensuring reliable fixation of the magnetism generation device.
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 effectively detects the rotational state of the bicycle wheel, providing reliable data and improving the accuracy and longevity of the detection system by integrating the magnetism generation device with the disc brake rotor adapter.
Implementation Method 1
a magnetism generation device comprises a magnetism generation portion and a holder
Data Source
AI summary
A magnetism generation device is attachable to a disc brake rotor adapter for a bicycle hub. The magnetism generation device comprises a magnetism generation portion and a holder. The holder has a first portion and a second portion. The first portion supports the magnetism generation portion. The second portion is releasably attached to the first portion with a portion of the disc brake rotor adapter disposed between the first and second portions while the magnetism generation device in an installed state on the disc brake rotor adapter.