Wireless Bicycle Shifting Wake Control for Low-Power Reliability

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Solution Overview

Problem

Existing wireless control systems for bicycles suffer from poor performance and high energy consumption, particularly in systems that require continuous operation of transceivers, leading to battery depletion and unreliable communication.

Innovation Solution

A wireless control system for bicycles that includes a wake unit or sensor to activate components only upon detection of vibrations or movement, using a slave control unit with a wireless receiver and a master control unit with a transmitter, employing low-power modes to conserve energy and enhance reliability, and utilizing specific frequency channels to avoid interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If a low-power transceiver is used to conserve energy, then battery life is extended, but wireless performance deteriorates

Engineering Contradiction:

Improvepower consumptionVSAvoidwireless performance

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The transceiver operates periodically rather than continuously, activating only when vibration is detected by the wake sensor. This periodic operation mode allows the use of lower power transceivers while maintaining reliable wireless communication during actual bicycle usage, thereby resolving the contradiction between energy conservation and wireless performance.

Inventive Principle:

Principle #19Periodic action

2Reliability

If the transceiver operates continuously to ensure reliable communication, then wireless performance is maintained, but power consumption increases

Engineering Contradiction:

Improvewireless communication reliabilityVSAvoidbattery power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system dynamically adjusts the transceiver operation state based on detected vibration. When vibration is detected indicating bicycle movement, the transceiver becomes active to ensure reliable communication. When no vibration is detected, the transceiver enters low-power mode. This dynamic adaptation resolves the contradiction by providing reliable communication only when needed.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent replaces continuous electronic monitoring with a vibration-based wake sensor mechanism to trigger transceiver operation. This mechanical/vibration-based triggering system substitutes for continuous power-consuming electronic states, achieving reliable communication activation through physical motion detection rather than continuous power supply.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If a periodic beacon signal is used to maintain connection, then system reliability is improved, but continuous battery power is consumed

Engineering Contradiction:

Improveconnection reliabilityVSAvoidbattery power

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

Instead of continuous beacon signaling, the system uses vibration-triggered periodic communication. The transceiver activates periodically only when vibration detects bicycle movement, eliminating continuous power consumption while maintaining connection reliability during actual use. This resolves the contradiction by making periodic communication event-driven rather than time-driven.

Inventive Principle:

Principle #19Periodic action

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 system achieves reliable and secure wireless control of bicycle components with reduced power consumption, ensuring efficient operation and minimizing battery drain while maintaining high performance even in crowded environments.

Implementation Method 1

The control system includes a wake sensor connected to the control unit, the wake sensor configured to cause the control unit and the wireless receiver to become operational in response to detected vibrations of the bicycle.

Methodology Applied

Scientific EffectVibration detection: Vibration

Data Source

PatentUS11685472B2Electromechanical shifting systems and methods

Publication Date: 2023.06.27 SRAM LLC

AI summary

A wireless control system for a bicycle may include a base part attachable to a bicycle and a movable part. The control system may also include an electric motor disposed on the electromechanical component and a control unit disposed on the electromechanical component for operating the electric motor to operate the electromechanical component, the control unit including a wireless receiver. The control system includes a wake sensor connected to the control unit, the wake sensor configured to communicate a wake signal to the control unit.