Motorcycle Fork Impact Sensor Placement for Oblique Collision Detection
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Solution Overview
Problem
Conventional impact detection sensors on motorcycles are less sensitive to oblique collisions due to their placement near the steering axis, and existing solutions require multiple sensors for effective detection, which complicates arrangement and increases costs.
Innovation Solution
The placement of impact detection sensors on both left and right front forks, with main sensors on the leading ends and sub-sensors above the front wheel, allows for sensitive detection of both front and oblique collisions while minimizing the effect of steering components, and using a single sub-sensor positioned on the vehicle body centerline reduces the number of sensors needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If impact detection sensors are arranged to combine main sensors and sub-sensors for backup, then detection reliability is improved, but the number of sensors increases making arrangement more complex
Solution Approach 1:
The sub-sensors serve multiple functions: they act as backup for the main sensors, detect oblique collisions that may be missed by main sensors, and provide redundant detection capability. This multi-functionality justifies the additional sensors while maximizing their utility across different collision scenarios.
Solution Approach 2:
The main sensors are positioned on the leading end sides of the front forks where they can mainly detect front collisions, while sub-sensors are positioned on the cross member above the front wheel where they can detect oblique collisions. Each sensor is placed at its optimal location for specific detection purposes, improving overall system reliability without requiring excessive sensors.
Data Source
AI summary
Impact detection sensors are disposed with ease for coping with an oblique collision or the like. A front wheel is disposed between left and right forks and supported by an axle. Main sensors are attached to the left and right forks at respective positions near and above the axle so as to be symmetrical. Thus, the main sensors detect impacts resulting from front and oblique collisions. In addition, backup sub-sensors are attached to the left and right front forks at respective positions above the corresponding main sensors so as to be symmetrical. This makes it possible to dispose the impact detection sensors at sensitive positions with ease while eliminating a steering component.