Bicycle Front Lighting With Fall Detection by Accelerometer
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Solution Overview
Problem
Bicycles that have fallen over may not be easily noticed by surrounding traffic, especially in conditions of reduced visibility, increasing the risk of secondary accidents and delaying help to the rider.
Innovation Solution
A front lighting device for bicycles that includes an accelerometer and a controller to sense acceleration along orthogonal axes, automatically controlling light emission to enhance noticeability when the bicycle falls over, using alternating patterns to signal the fall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional switch-controlled lighting assembly is used, then the device is simple and easy to operate, but it cannot automatically detect fallen bicycle orientation and provide enhanced visibility
Solution Approach 1:
The lighting device automatically detects fallen bicycle orientation using an accelerometer and controller, then adjusts light emission patterns without user intervention. The system serves itself by autonomously sensing the bicycle's state and responding with appropriate lighting patterns to enhance visibility to surrounding traffic.
Solution Approach 2:
The patent replaces manual switch operation with an accelerometer-based sensing system that automatically detects orientation changes. The mechanical action of switching is substituted by electronic sensing and automatic control, enabling the lighting to respond to fallen bicycle conditions without human input.
2Reliability
If the lighting assembly emits light continuously in all directions, then visibility is maximized, but energy consumption increases and normal riding visibility is compromised
Solution Approach 1:
The lighting system dynamically adjusts its emission pattern based on the detected orientation of the fallen bicycle. The controller modifies the direction and pattern of light emission according to the accelerometer data, enabling adaptive visibility enhancement that responds to the actual fallen position rather than using a fixed omnidirectional pattern.
Solution Approach 2:
The lighting assembly employs alternating light emission patterns when a fallen orientation is detected, creating a flashing or pulsing effect that draws attention to the fallen bicycle. This periodic action enhances noticeability through temporal variation in light output rather than continuous steady illumination.
3Extent of automation
If the lighting device adds accelerometer and controller components, then automatic fallen detection capability is achieved, but manufacturing cost and device complexity increase
Solution Approach 1:
The accelerometer serves multiple functions: it detects fallen bicycle orientation for lighting control and can also provide leveling function for the lighting assembly. This multi-functionality reduces the need for separate components and justifies the addition of the accelerometer by extracting maximum utility from a single added component.
Solution Approach 2:
The controller modifies the lighting parameters (emission pattern, intensity, timing) based on accelerometer data to achieve automatic fallen detection and response. By changing the operational parameters of the existing lighting assembly rather than adding complex mechanical detection systems, the patent achieves automation with relatively simple and inexpensive components.
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 reliably distinguishes between normal and fallen orientations, promoting increased visibility of the fallen bicycle to traffic, enhancing safety and reducing the risk of secondary accidents.
Implementation Method 1
an accelerometer (7) configured to sense proper acceleration along at least two mutually orthogonal axes
Data Source
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Figure 5~6
AI summary
Front lighting device (1) for mounting to a steerable assembly (2) of a bicycle (3), the steerable assembly (2) being steerable with respect to a main frame (4) of the bicycle (3) for steering a front wheel (5) of the bicycle (3) with respect to the main frame (4), wherein the front lighting device (1) comprises: a lighting assembly (6) for emitting light mainly in a forward riding direction of the front wheel (5) when mounted; an accelerometer (7) configured to sense proper acceleration along at least two mutually orthogonal axes, including an X-axis corresponding to an axial direction of the front wheel (5) when mounted, and a Z-axis mainly corresponding to the riding direction of the front wheel (5) when mounted; and a controller (8) operatively connected to the lighting assembly (6) and the accelerometer (7) and configured to control the light emission by the lighting assembly (6) depending on the proper acceleration sensed by the accelerometer (7) along the X-axis and the Z-axis.