Bicycle Headlight Adaptive Cornering Illumination via Sensor Control
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Solution Overview
Problem
Newer headlights for bicycles and LEVs with high light output risk blinding oncoming vehicles and lack secure attachment to the bike frame, especially during cornering, where improved illumination and protection are desired.
Innovation Solution
A lighting device with at least three separate light units, including a central light unit and side light units that can be controlled based on the rotation of the fork, providing homogeneous illumination during cornering, and a sensor system to adjust light output and angle to prevent blinding and enhance visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high light output LEDs are used in the headlight, then illumination intensity is improved, but the risk of blinding oncoming vehicles increases
Solution Approach 1:
The headlight is divided into multiple independently controllable LED units (central lighting unit and lateral lighting units) that can be selectively activated based on steering position, allowing the system to provide high illumination when needed while avoiding blinding by controlling which units are active
Solution Approach 2:
The lighting system dynamically adjusts which LED units are activated based on real-time detection of fork shaft rotational position, transitioning from a static lighting pattern to a dynamic one that adapts to the rider's steering actions and cornering movements
2Reliability
If the headlight is integrated into the bicycle frame, then attachment security is improved, but device complexity increases
Solution Approach 1:
The headlight assembly is integrated with the bicycle frame structure, combining two separate components (headlight and frame mounting) into a unified assembly that provides secure attachment while reducing the number of separate parts and simplifying the overall system
3Device complexity
If conventional single light unit headlights are used, then device complexity is reduced, but cornering illumination quality deteriorates
Solution Approach 1:
The lighting system is segmented into multiple LED units with different beam angles - a central unit for straight-ahead illumination and lateral units for cornering illumination - allowing each unit to be optimized for its specific function rather than requiring a single compromised design
Solution Approach 2:
Different LED units are assigned different optical characteristics and beam angles tailored to their specific functions - the central unit provides forward illumination while lateral units provide angled illumination for cornering, with each unit's optics locally optimized for its purpose
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 solution ensures improved cornering safety by providing adaptive illumination that avoids blinding oncoming vehicles and securely attaches the headlight to the bike frame, enhancing traffic safety and protection during falls.
Implementation Method 1
a sensor device with which a rotational position of the fork shaft can be sensed
Implementation Method 2
a plurality of LEDs distributed along the front surface as lighting means
Data Source
Figure 1~6
Figure 2~3
Figure 4~5
AI summary
The invention relates to a lighting device for single-track vehicles, comprising a rotatably mounted fork steerer tube 205, a headlight 111 with a housing 115 and several LEDs, as well as at least one sensor device 260 and a control unit for the LEDs. To improve functionality when cornering, at least one LED is arranged in the housing as a central lighting unit 112, and at least one further LED is arranged laterally and/or vertically offset from the central lighting unit 112 as a lateral lighting unit 114. The rotational position of the fork steerer tube 5 can be detected by means of the sensor device and control unit, and the central lighting unit 112 and at least one lateral lighting unit 114 can be controlled depending on the rotational position. The invention also relates to the vehicle and a headlight.