Bicycle Sensor Pivot Adjustment for Detection Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional sensing devices for detecting bicycle speed face challenges in maintaining sensitivity due to difficulties in precisely adjusting the sensor position relative to the magnet, leading to reduced detection accuracy.
Innovation Solution
The sensing device features a pivotable sensor with a guide device that allows easy adjustment of the sensor's mounting position and orientation, ensuring a consistent distance and preventing sensitivity reduction, by using a fixing member to secure the sensor to a supporting section and limiting pivoting within a fixed range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor main unit is precisely positioned to maintain normal distance from the magnet, then detection sensitivity is maintained, but mounting position adjustment becomes difficult
Solution Approach 1:
The sensor main unit is designed to be movable in the radial direction of the wheel relative to the rubber pad, allowing dynamic adjustment of the mounting position. This enables precise positioning to maintain optimal detection sensitivity while also allowing easy adjustment during installation and maintenance
Solution Approach 2:
The sensing device is divided into separate components: the rubber pad attached to the front fork, the sensor main unit that can move relative to the rubber pad, and the magnet on the wheel spoke. This segmentation allows independent adjustment of each component to achieve precise positioning while maintaining ease of operation
2Stability of the object's composition
If the sensor is fixed rigidly to the supporting section, then structural stability is improved, but sensitivity decreases due to inability to maintain precise distance
Solution Approach 1:
The sensor main unit incorporates both movement capability (for adjustment) and fixation capability (for stability). The sensor can move radially for positioning, then be fixed to the rubber pad to maintain structural stability while preserving detection sensitivity through precise positioning
Solution Approach 2:
The system allows changing the radial distance parameter between the sensor and magnet for optimal sensitivity, then maintains that parameter through fixation. The movable-fixture mechanism enables parameter optimization followed by stabilization
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 configuration enables precise and easy adjustment of the sensor position, maintaining optimal sensitivity and accuracy in detecting bicycle speed and distance, enhancing the overall performance of the sensing device.
Implementation Method 1
a sensor main unit 86 that detects the magnetism of the magnet 82
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A sensing device 20 that detects the rotation of a wheel 4 of a bicycle 1, the sensing device 20 including a mobile-side sensing body 22 provided on the wheel 4, and an immobile-side sensing body 23 provided on a chain stay 13, the immobile-side sensing body 23 including a mounting section 29 attached to the chain stay 13, a sensor 30 that detects the mobile-side sensing body 22 crossing the immobile-side sensing body 23, and a supporting section 31 that supports the sensor 30, the sensor 30 being movable in a first direction A that increases or reduces a distance D between the mounting section 29 and the sensor 30, the sensor 30 including a fixing member 38 that fixes the sensor 30 to the supporting section 31.