Bicycle Treading Frequency Sensor Hollow Axle Integration
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Solution Overview
Problem
Existing bicycle treading frequency sensors lack stability and convenience in installation, often loosening due to the need for separate components to rotate synchronously, and require complex setups with exposed parts.
Innovation Solution
A compact, stable bicycle treading frequency sensor with a signal acquisition unit for real-time acceleration and angular velocity data, a data transmission unit for wireless data transfer, and a power supply integrated within a hollow shell, allowing secure fixation on the middle axle without exposed components, using acceleration and gyroscope sensors to determine treading frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate components are used for induction sensing, then the sensor can acquire treading frequency data, but the components loosen after long-time motion affecting stability
Solution Approach 1:
The patent merges the sensing components into a single integrated sensor unit that is fixed at one location on the bicycle frame. The sensor includes an acceleration sensor and gyroscope sensor combined in one housing, eliminating the need for multiple separate components that need to be precisely positioned relative to each other. This integration resolves the loosening problem by having only one fixed mounting point.
Solution Approach 2:
The patent replaces the mechanical induction sensing system (requiring physical magnets and coils in precise alignment) with an electronic sensing system using acceleration sensors and gyroscopes. These electronic sensors detect motion through electrical signals rather than mechanical interaction, eliminating the need for precise mechanical coordination between separate components and thus preventing loosening issues.
2Ease of operation
If components are fixed via bandage, then the sensor can be installed on existing bicycle, but the components shift after long-time motion
Solution Approach 1:
By combining all sensing components into a single integrated unit, the patent reduces multiple bandage-fixed components to one single fixture. This single integrated sensor housing is mounted at one location on the frame, eliminating the cumulative loosening that occurs when multiple bandage-fixed components shift relative to each other during motion.
3Device complexity
If a compact integrated sensor is used, then the structure is simplified and stability improved, but the sensor needs to be fixed on hollow middle axle
Solution Approach 1:
The patent designs the integrated sensor with a universal mounting interface that can be adapted to different bicycle types. The sensor housing includes a standardized fixation structure that can be mounted on various frame geometries and middle axle configurations. This universality allows the same compact sensor design to be applied across different bicycle models while maintaining the simplicity benefits of 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 sensor provides reliable, real-time treading frequency data without loosening, is easy to install, and maintains stability, applicable to all bicycles with hollow middle axles, offering a simple and robust solution for data acquisition.
Implementation Method 1
signal acquisition unit arranged on a circuit board and used for acquiring motion acceleration changes or/and angular velocity changes in different rotation directions of a middle axle in real time
Implementation Method 2
signal acquisition unit also includes a three-axis gyroscope sensor for acquiring angular velocity
Data Source
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AI summary
The invention discloses a bicycle treading frequency sensor, comprising a signal acquisition unit arranged on a circuit board and used for acquiring motion acceleration changes or/and angular velocity changes in different rotation directions of a middle axle in real time, a data transmission unit for transmitting the acquired data to a terminal, and a power supply for supplying power to each unit to work. When in use, the treading frequency sensor is fixed on the hollow middle axle of a bicycle, and the middle axle, a crank and pedals of the bicycle rotate synchronously; during riding motion, acceleration change or/and angular velocity change data is acquired in real time and transmitted to the corresponding processing terminal via the data transmission unit for processing, real-time rotating frequency of the middle axle of the bicycle is obtained, and then treading frequency data during riding is acquired. Because the treading frequency sensor skillfully implements counting through periodical changes of acceleration or/and angular velocity data and other data when the bicycle moves and does not need to carry out counting in a sensing mode through periodical relative motion between two separated components, the treading frequency sensor is simple in structure, small in size and works stably and reliably.