Wireless Bicycle Shifting with Vibration-Triggered Wake Control

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Solution Overview

Problem

Existing wireless control systems for bicycles suffer from poor performance and high energy consumption, particularly in systems requiring continuous operation of transceivers, which leads to battery depletion and security concerns.

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 security through pairing mechanisms and encryption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a wireless transceiver is operated continuously to ensure reliable communication, then communication reliability is improved, but energy consumption increases

Engineering Contradiction:

Improvewireless control reliabilityVSAvoidbattery power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The transceiver operates periodically rather than continuously, entering sleep mode between communication events. The system wakes up only when vibration sensors detect bicycle motion or when shift commands are needed, thereby reducing energy consumption while maintaining communication reliability when required.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system performs preliminary actions by detecting vibrations and pre-activating the transceiver before actual communication is needed. This allows the system to be ready for communication only when the bicycle is in use, avoiding continuous operation and reducing power consumption.

Inventive Principle:

Principle #10Preliminary action

2Use of energy by moving object

If a low-power transceiver is used to conserve energy, then energy consumption is reduced, but wireless performance deteriorates

Engineering Contradiction:

Improvebattery power consumptionVSAvoidwireless control performance

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The transceiver power level is dynamically adjusted based on operational needs. When vibration detection indicates the bicycle is in use, the transceiver activates at full power for reliable communication. When the bicycle is stationary, the transceiver enters low-power sleep mode, optimizing the balance between performance and energy consumption.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system uses periodic vibration monitoring to trigger transceiver activation only when needed, allowing the use of lower power settings during active periods while maintaining overall energy efficiency throughout the day.

Inventive Principle:

Principle #19Periodic action

3Speed

If the transceiver is always on to ensure communication availability, then communication responsiveness is improved, but security against unauthorized access worsens

Engineering Contradiction:

Improvecommunication response timeVSAvoidunauthorized access vulnerability

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary authentication and pairing only when vibration detection indicates the bicycle is in use. This ensures that communication channels are established securely before actual data transmission occurs, preventing unauthorized access while maintaining quick response times during active periods.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system implements preliminary security measures by requiring authentication and pairing before allowing communication. This preliminary anti-action prevents unauthorized access attempts from succeeding, as the transceiver remains in a secured state until proper authentication is verified.

Inventive Principle:

Principle #9Preliminary anti-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 preventing unauthorized access by activating only when in use and using encryption for secure communication.

Implementation Method 1

a 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

PatentUS11345440B2Electromechanical shifting systems and methods

Publication Date: 2022.05.31 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.