Laser Beam Pedestrian Warning System for Quiet Zones
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Solution Overview
Problem
Existing methods for warning pedestrians of approaching vehicles in quiet areas, such as residential streets or near schools, cause noise pollution and may be prohibited by local traffic laws, as they rely on vehicle horns, which are ineffective with quieter vehicles like electric cars.
Innovation Solution
A system using a laser beam projected onto the road surface ahead of pedestrians to indicate an approaching vehicle, detected by a front impact sensor and controlled by a unit that designates moving objects within a specific angle range as warning targets, emitting the laser beam at a calculated angle to alert pedestrians without noise pollution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a horn is used to warn pedestrians, then the warning function is achieved, but noise pollution is caused and pedestrian stress increases
Solution Approach 1:
The patent replaces the acoustic warning system (horn) with an optical warning system (laser beam). The laser beam projects light patterns on the road surface to alert pedestrians of approaching vehicles, eliminating noise pollution while maintaining warning effectiveness. This substitution transforms the warning mechanism from acoustic to optical domain.
Solution Approach 2:
The patent changes the physical parameter of the warning signal from acoustic frequency (horn sound) to optical intensity (laser light). By projecting laser beams with specific intensities and patterns onto the road surface, the system provides effective visual warnings without generating harmful noise, thus changing the fundamental parameter of the warning signal.
2Reliability
If a horn is used to warn pedestrians, then the warning function is achieved, but the method is prohibited in quiet areas by traffic laws
Solution Approach 1:
The patent replaces the horn-based acoustic warning system with a laser-based optical warning system. This substitution enables the vehicle to provide effective warnings in quiet areas where horn usage is prohibited, as the laser beam operates silently and does not violate noise regulations in residential or school zones.
3Reliability
If a horn is used to warn pedestrians, then the warning function is achieved, but the method is ineffective with quiet vehicles like electric cars
Solution Approach 1:
The patent replaces the acoustic horn warning system with an optical laser warning system. This is particularly effective for electric vehicles and other quiet vehicles that lack the natural engine noise to alert pedestrians. The laser beam provides a visible warning signal that compensates for the absence of acoustic warnings from electric motors.
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
Effectively notifies pedestrians of an approaching vehicle without causing discomfort or noise pollution, suitable for areas where traditional horn use is restricted or undesirable.
Implementation Method 1
generates a signal for controlling an emission angle of a laser beam, and the laser beam is emitted through a laser light
Data Source
AI summary
Disclosed herein is a system and method of providing a warning to a pedestrian using a laser beam. In particular, objects present in a detection area of a front impact sensor provided on a vehicle are detected. A movement path vector of a first moving object that is moving in a direction identical to that of the vehicle, among the objects present in the detection area, is generated. When the movement path vector of the first moving object falls within an error range of a movement vector of the vehicle, the first moving object is designated as belonging to a group of laser warning target candidates, and thereafter an emission angle of a laser beam is generated. The laser beam is emitted through a laser light based on the emission angle of the laser beam.