Snow Vehicle Laser Pattern Lighting for Whiteout Obstacle Detection
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Solution Overview
Problem
Conventional lighting systems for snow vehicles, such as snow groomers, struggle to effectively detect obstacles and topographical conditions in harsh weather conditions like whiteouts, where contrast is reduced and two-dimensional lighting makes it difficult to recognize three-dimensional objects, leading to increased risk of accidents.
Innovation Solution
The implementation of a laser-based lighting system that projects a defined pattern onto the ground, using a sharply focusable laser beam with special optics to create a visually recognizable structure, allowing the driver to infer the presence of obstacles through deviations in the beam pattern, and incorporating a self-levelling mechanism and gyroscope sensor for precise orientation and object recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional two-dimensional lighting is used, then the lighting system is simple, but obstacles and three-dimensional objects cannot be effectively detected in harsh weather conditions
Solution Approach 1:
The patent transitions from conventional two-dimensional lighting to three-dimensional laser lighting by projecting laser beams that create spatial patterns (lines, planes, or volumetric structures) in the environment. This dimensional enhancement allows obstacles and topographical features to be detected through their interaction with the 3D light structure, providing depth perception and spatial awareness that 2D lighting cannot achieve, especially in whiteout conditions.
Solution Approach 2:
The patent changes the fundamental parameters of the lighting system by using laser technology with specific wavelengths (e.g., 532nm green laser) and controlling beam parameters such as divergence angle, intensity distribution, and temporal characteristics. These parameter changes enable the light to maintain coherence and structure over distance, allowing obstacle detection through phase modulation and time-of-flight measurements.
2Loss of information
If conventional headlights are used, then the lighting system is easy to operate, but the driver cannot recognize obstacles or detect topographical conditions during whiteouts
Solution Approach 1:
The patent implements feedback mechanisms where sensors detect the reflected or scattered laser light from obstacles and topographical features, and this information is processed to provide real-time visual feedback to the driver. The system analyzes changes in light intensity, phase, or time-of-flight to identify obstacles and convey this information through enhanced visualization, allowing the driver to perceive depth and spatial relationships even in whiteout conditions without increasing operational complexity.
Solution Approach 2:
The patent employs composite lighting approaches that combine conventional illumination with laser-based 3D lighting structures. This composite system integrates different light sources and modulation techniques to create a multi-layered visual information system that provides both general illumination and specific obstacle detection capabilities, maintaining ease of operation while significantly improving visual information availability.
3Length of stationary object
If laser beams are projected over long distances, then obstacle detection range is improved, but the beam pattern becomes more difficult to maintain and control
Solution Approach 1:
The patent employs dynamic control systems that continuously adjust laser beam parameters such as focus position, divergence angle, and intensity distribution based on real-time feedback from sensors and vehicle motion data. This dynamic adaptation allows the beam pattern to maintain its structural integrity and detection accuracy over varying distances, compensating for atmospheric conditions, vehicle movement, and target range changes.
Solution Approach 2:
The patent divides the laser lighting system into multiple independent beam units or modular components, each capable of being controlled and optimized for specific distance ranges. This segmentation allows different portions of the projection field to be managed with appropriate parameters, maintaining beam pattern precision across long distances by treating each spatial zone independently rather than as a single uniform beam.
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 laser-based system enables the driver to clearly recognize three-dimensional objects and topographical conditions, reducing the risk of accidents by providing a stable and flicker-free pattern that adapts to the vehicle's movement and terrain, even in challenging weather conditions.
Implementation Method 1
The lighting element is a laser with at least one laser beam, which projects a pattern with a structure onto the surrounding ground
Implementation Method 2
the pattern being distorted in a visually recognizable manner on the obstacle to be detected or the topographical condition
Data Source
AI summary
The disclosure relates to a snow vehicle having at least one lighting element for orientation in the surroundings of the vehicle and for optical detection of obstacles and topographical conditions of the surroundings, wherein the lighting element is a laser having at least one laser beam, which projects a pattern having a structure on the ground of the surroundings, said pattern being distorted in a visually recognizable manner on the obstacle to be detected or on the topographical conditions.