Human-Powered Vehicle Control Device with Dual Detector Switching
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Solution Overview
Problem
Existing human-powered vehicle control systems lack efficient methods to dynamically control vehicle components based on varying detector outputs, leading to suboptimal performance and potential errors in speed detection and human driving force input.
Innovation Solution
A control device with multiple detectors and an electronic controller that adjusts vehicle component control based on the state of each detector, allowing for preferred operation by switching control between different detectors depending on their outputs, ensuring optimal performance even when one detector is not functioning correctly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single detector is used to control vehicle components, then the control system is simple, but the reliability deteriorates when the detector is faulty or not in predetermined state
Solution Approach 1:
The patent assigns different functional roles to different detectors based on their output states. The first detector is used for normal operation while the second detector serves as a backup or alternative control source when the first detector is faulty. This local differentiation of detector functions resolves the contradiction by ensuring reliability through selective usage without requiring both detectors to operate simultaneously, thus avoiding unnecessary complexity.
Solution Approach 2:
The control system dynamically switches between using the first detector and the second detector based on the operational state of the first detector. When the first detector is in a predetermined state, it controls the vehicle component; when not in the predetermined state, the second detector takes over. This dynamic adaptation resolves the contradiction by maintaining reliability through flexible detector selection while keeping the system structure relatively simple.
2Reliability
If multiple detectors are used to ensure reliability, then the control reliability improves, but the device complexity increases
Solution Approach 1:
The control system dynamically selects which detector to use based on the operational state of the first detector. The electronic controller monitors the first detector's output state and switches to the second detector only when necessary. This dynamic approach resolves the contradiction by achieving reliability through conditional multi-detector usage rather than continuous multi-detector operation, thereby limiting the increase in system complexity.
Solution Approach 2:
The patent implements a hierarchical detector configuration where the first detector has primary control authority and the second detector has secondary or backup authority. This local quality differentiation resolves the contradiction by ensuring reliability through layered detector functionality while maintaining clear control logic that prevents excessive system complexity.
3Adaptability or versatility
If the control system switches between different detectors based on their states, then the adaptability improves, but the control complexity increases
Solution Approach 1:
The control system employs dynamic switching logic that adapts detector selection based on real-time operational states. The electronic controller continuously monitors the first detector's state and transitions to the second detector when the first detector is not in the predetermined state. This dynamic adaptability resolves the contradiction by enabling flexible response to different detector conditions while using straightforward switching logic that prevents excessive control complexity.
Solution Approach 2:
The control system incorporates feedback mechanisms where the electronic controller monitors the output states of detectors and adjusts detector selection accordingly. The feedback loop checks whether the first detector is in the predetermined state and determines whether to use the first or second detector for control. This feedback-based approach resolves the contradiction by achieving adaptability through state-dependent detector selection while maintaining manageable control logic through systematic feedback evaluation.
Data Source
AI summary
A control device is used with a human-powered vehicle including a vehicle component and at least first and second detectors. The first detector detects first information of the human-powered vehicle and the second detector detects second information of the human-powered vehicle. The control device includes an electronic controller that controls the vehicle component in accordance with outputs of the first detector and the second detector. The electronic controller controls the vehicle component in accordance with the output of the second detector where the output of the first detector is not in the first state and the output of the second detector is in the second state, and controls the vehicle component in accordance with the output of the first detector where the output of the first detector is in the first state and the output of the second detector is not in the second state.