Electronic Controller State Switching for Human-Powered Vehicle
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Solution Overview
Problem
Existing human-powered vehicle electronic devices switch operational states due to vibration, leading to unnecessary power consumption when the vehicle is stationary, and fail to accurately switch states based on the rider's input, causing inefficiencies.
Innovation Solution
An electronic device with a controller that selectively operates in multiple states, switching based on the rotational amount of the crank, using a detector like an acceleration sensor to differentiate between intentional and unintentional movements, thereby reducing power consumption and improving state switching accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the electronic controller switches operational states based on acceleration detection, then the responsiveness to rider input is improved, but false switching due to vehicle vibration occurs
Solution Approach 1:
The patent introduces a rotational body (crank) as an intermediary element between the acceleration sensor and the state switching logic. The sensor detects rotation of the crank, which serves as a reliable mediator that distinguishes intentional rider input from vehicle vibration, since the crank only rotates when the rider actively pedals.
2Ease of operation
If the electronic controller remains in a high-power operational state, then the readiness to respond to rider input is improved, but power consumption increases during stationary periods
Solution Approach 1:
The patent implements dynamic state switching between low-power and high-power operational states based on real-time detection of crank rotation. The controller adapts its power consumption level by transitioning to a high-power state only when rotation is detected, and returning to low-power state when rotation stops, thereby optimizing the balance between readiness and energy efficiency.
3Measurement precision
If the electronic controller uses a low threshold for state switching, then the sensitivity to rider input is improved, but unnecessary switching due to vibration occurs
Solution Approach 1:
The patent applies local quality by specifically monitoring the rotational motion of the crank rather than general acceleration of the vehicle. This localized measurement approach ensures that only forces applied directly to the crank (intentional rider input) trigger state switching, while general vehicle vibrations that do not rotate the crank are ignored.
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 device efficiently manages power consumption by preventing unnecessary state switches during stationary periods and accurately switching operational states based on rider input, enhancing the usability and efficiency of human-powered vehicles.
Implementation Method 1
using a detector like an acceleration sensor to differentiate between intentional and unintentional movements
Data Source
AI summary
An electronic device is provided to a human-powered vehicle. The electronic device basically includes an electronic controller. The electronic controller is configured to selectively operate in an operational state that includes a first operational state and a second operational state. The second operational state consumes more electric power than the first operational state. The electronic controller is configured to switch the operational state between the first operational state and the second operational state in accordance with a rotational amount of a rotational body included in a transmission path of a human driving force in the human-powered vehicle.