Adaptive Bicycle Lighting Device with Speed-Responsive Flashing
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Solution Overview
Problem
Conventional bicycle lighting devices have a fixed flashing frequency that can lead to incorrect judgment of distance by vehicle drivers, as it does not adapt to the speed of approaching vehicles or the brightness of their headlights, potentially causing accidents.
Innovation Solution
A bicycle lighting device with a speed detector and light collection unit connected to a controller, which adjusts the flashing frequency of the light source based on the speed and brightness of approaching vehicles, using a pulse width modulation unit to ensure the light is visible and effective.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the bicycle lighting device uses a fixed flashing frequency, then the device structure is simple, but the drivers of vehicles can easily adapt to the flashing frequency and ignore it, leading to incorrect judgment of distance
Solution Approach 1:
The patent applies dynamics by making the flashing frequency variable rather than fixed. The controller adjusts the flashing frequency of the LED based on real-time detection of vehicle approach speed, transforming a static system into a dynamic one that adapts to changing conditions. This resolves the contradiction by enabling frequency adaptability while managing complexity through targeted dynamic adjustment rather than complete system redesign.
Solution Approach 2:
The patent changes the parameter of flashing frequency from a constant value to a variable parameter that responds to external conditions. By detecting vehicle speed and headlight brightness, the system adjusts the flashing frequency parameter accordingly, allowing the lighting device to adapt to different scenarios without requiring a completely new device architecture.
2Reliability
If the bicycle lighting device does not detect vehicle speed and headlight brightness, then the device complexity is low, but the flashing frequency does not adapt to approaching vehicles, reducing visibility and safety
Solution Approach 1:
The patent implements feedback mechanisms by using sensors to detect vehicle speed and headlight brightness, then feeding this information back to the controller which adjusts the LED flashing frequency accordingly. This closed-loop feedback system enhances reliability by ensuring the lighting device responds appropriately to approaching vehicles, while the feedback is managed through a centralized controller that coordinates the detection and response.
Solution Approach 2:
The patent applies multi-functionality by designing a controller that handles multiple tasks: receiving speed detection signals, processing headlight brightness information, determining the appropriate flashing frequency, and controlling the LED output. This universal controller consolidates multiple functions into a single component, enhancing reliability without proportionally increasing overall system complexity.
3Illumination intensity
If the bicycle lighting device uses a simple ON/OFF mode, then the operation is simple, but the lighting device may not be seen by vehicle headlights that are much brighter, reducing visibility
Solution Approach 1:
The patent applies periodic action by using flashing LED modes instead of continuous illumination. The LED flashes at variable frequencies depending on vehicle approach conditions, creating a more noticeable signal to drivers than steady light. This periodic action enhances visibility against brighter vehicle headlights while the automatic frequency adjustment maintains operational simplicity for the user.
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 adaptive flashing frequency enhances visibility to vehicle drivers, providing clearer signals and reducing the risk of collisions by synchronizing with vehicle speed and headlight brightness.
Implementation Method 1
A light collection unit is connected to the bicycle lighting device and electrically connected to the controller. The light collection unit faces the headlight of the vehicle and collects brightness of the headlight of the vehicle.
Implementation Method 2
a convex lens is connected to a front end of the reflection cup to concentrate light beams from the headlight of the vehicle
Implementation Method 3
a reflection cup located at the front end of the bicycle lighting device. A light source is located at the rear end in the reflection cup
Data Source
AI summary
A bicycle lighting device includes a reflection cup in which a light collection unit and a light source and are respectively located therein. A speed detector is connected to the bicycle lighting device and a controller so as to detecting the speed of a vehicle moving toward the bicycle. The light collection unit collects brightness of the headlight of the vehicle. A pulse width modulation unit is electrically connected to the light collection unit and the light source. The pulse width modulation unit adjusts the flashing frequency of the light source according to the speed of the vehicle moving toward the bicycle lighting device.