Bicycle Gear Shift Control Using Environmental Sensing
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Solution Overview
Problem
Existing automatic gear shift devices for bicycles rely on backward-looking information such as vehicle speed, pedaling frequency, and torque, which are insufficient for determining the immediate need for gear shifting or predicting future shifting demands.
Innovation Solution
A gear shift control device and method that incorporates an environmental sensing unit, a pedal sensing unit, and a processor to detect environmental and pedal states, generating adjustment signals to automatically adjust the gearing position based on real-time data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If backward-looking information (vehicle speed, pedaling frequency, torque) is used for gear shift control, then the system can maintain basic automatic shifting function, but it cannot accurately determine immediate or predict future gear shifting needs
Solution Approach 1:
The patent applies preliminary action by using environmental sensing data (slope, temperature, humidity) to predict future gear shifting needs before they occur. The system proactively adjusts gearing based on anticipated conditions rather than reacting to past performance data, enabling the bicycle to prepare for upcoming terrain changes or environmental conditions that will affect optimal gear selection.
2Measurement precision
If only basic sensing units are used, then the device complexity is low, but the gear shift control accuracy and adaptability are insufficient
Solution Approach 1:
The patent implements multi-functionality by designing sensing units that perform multiple detection functions. The environmental sensing unit simultaneously detects temperature, humidity, and slope information, while the pedal sensing unit monitors both pedaling frequency and torque. This allows a single integrated system to gather comprehensive data for accurate gear shift control without requiring separate specialized sensors for each parameter.
3Ease of operation
If manual gear shifting is required, then the rider has direct control over gear selection, but riders who cannot manually shift with proper force, timing, or direction experience reduced pedaling efficiency
Solution Approach 1:
The patent applies self-service by enabling the gear shift system to automatically adjust gearing based on environmental and pedaling data without requiring manual rider intervention. The processor analyzes sensor inputs and autonomously controls the gear shifting mechanism, allowing the system to serve itself in optimizing gear selection based on real-time conditions and predicted future states.
Data Source
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AI summary
A gear shift control device (10), for a bicycle gear shift system (20), includes an environmental sensing unit (101), configured to detect an environmental state and generate a first detection result; a pedal sensing unit (102), configured to detect a pedal state and generate a second detection result; and a processor (103), coupled to the environment sensing unit and the pedal sensing unit, configured to generate an adjustment signal according to the first detection result and the second detection result to adjust a gearing position of the bicycle gear shift system.