Bicycle Steering Unit With PMD Finger Gesture Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bicycle steering systems suffer from reduced reliability and increased wear due to mechanical contact-based control mechanisms, which can lead to wear and tear of components.
Innovation Solution
Employing a photonic mixer device, specifically a PMD sensor, to detect finger positions contactlessly, allowing for gesture control of bicycle components such as brakes, transmissions, and lighting, thereby reducing mechanical wear and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical contact-based control mechanisms are used, then ease of operation is maintained, but component wear increases and reliability decreases
Solution Approach 1:
The patent replaces mechanical contact-based control mechanisms with an optical sensing system using photonic mixer devices. These devices detect finger positions and gestures through optical fields without physical contact, eliminating mechanical wear while maintaining intuitive control. The optical detection system substitutes for traditional mechanical switches, levers, or buttons that require physical contact.
Solution Approach 2:
The patent introduces an optical field as an intermediary between the rider's hand and the control system. The photonic mixer devices use optical fields to detect finger positions and gestures, serving as a non-contact mediator that transfers control information without mechanical contact. This intermediary optical field enables control while eliminating direct mechanical interaction between components.
2Loss of substance
If mechanical contact-based control mechanisms are used, then ease of operation is maintained, but component wear increases
Solution Approach 1:
The patent replaces mechanical contact-based control mechanisms with an optical sensing system using photonic mixer devices. These devices detect finger positions and gestures through optical fields without physical contact, eliminating mechanical wear while maintaining intuitive control. The optical detection system substitutes for traditional mechanical switches, levers, or buttons that require physical contact.
Solution Approach 2:
The optical sensing system requires no physical maintenance or wear compensation mechanisms. The photonic mixer devices continuously detect finger positions without degrading, eliminating the need for periodic maintenance, part replacement, or wear compensation that characterizes mechanical systems. The system serves itself by maintaining consistent optical detection performance over time.
3Reliability
If photonic mixer device is used for contactless gesture control, then component wear is reduced, but device complexity increases
Solution Approach 1:
The photonic mixer devices serve multiple functions: detecting finger positions,识别ing gestures, and controlling various bicycle components (brakes, transmission, lighting). This multi-functionality reduces the need for separate control mechanisms for each function, thereby managing system complexity while providing comprehensive control capabilities through a unified optical sensing approach.
Solution Approach 2:
The patent introduces an optical field as an intermediary between the rider's hand and the control system. The photonic mixer devices use optical fields to detect finger positions and gestures, serving as a non-contact mediator that transfers control information without mechanical contact. This intermediary optical field enables control while eliminating direct mechanical interaction between components.
4Loss of substance
If photonic mixer device is used for contactless gesture control, then mechanical wear is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent replaces mechanical contact-based control mechanisms with an optical sensing system using photonic mixer devices. These devices detect finger positions and gestures through optical fields without physical contact, eliminating mechanical wear while maintaining intuitive control. The optical detection system substitutes for traditional mechanical switches, levers, or buttons that require physical contact.
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 photonic mixer device enables precise detection of finger positions for intuitive and reliable control of bicycle components, reducing wear and ensuring consistent operation even in varying lighting conditions.
Implementation Method 1
A PMD sensor is an optical sensor, the functional principle of which is based on the time-of-flight method. In this respect, a PMD sensor generally also corresponds to what is known as a TOS sensor, where TOS stands for Time of Flight. In a PMD sensor, the object to be sensed or to be detected is illuminated by light pulses, with the respective object reflecting these light pulses and the reflected light pulses being detected by the PMD sensor. On account of the time of flight, the distance between the PMD sensor and the respective object can be calculated.
Data Source
AI summary
A steering unit (1) is provided for a bicycle (2), in particular for an electric bicycle, and a bicycle (2) equipped with the steering unit (1) also is provided. The steering unit (1) has handle bars (3) for connecting the steering unit (1) to the bicycle (2). At least one handle (4) is arranged and/or formed on the handle bars (3) for gripping with a hand. Operating safety of the bicycle (2) is improved by providing the steering unit (1) with at least one photonic mixer device (6) for detecting finger positions of the hand gripping the handle (4).