Optical Sensor Fog Density Analysis via Reflection Point Distribution
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Solution Overview
Problem
Existing fog determination technologies face difficulties in accurately assessing fog density due to low reflection points when fog density is high, leading to unreliable detection.
Innovation Solution
A fog determination apparatus that uses an optical sensor to acquire point data on reflection points and determines fog density based on the distribution of distances between first and second reflection points, employing clustering and histogram analysis to accurately assess fog density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electromagnetic waves are transmitted to determine reflection points for fog detection, then fog presence can be detected, but the detection reliability deteriorates when fog density is high due to low number of reflected waves
Solution Approach 1:
The patent replaces electromagnetic wave-based detection with optical sensor-based detection. The optical sensor emits light beams and detects reflected light from fog particles, providing sufficient reflection points even in high-density fog conditions where electromagnetic waves fail to produce adequate reflections.
Solution Approach 2:
The patent changes the detection parameter from electromagnetic wave reflection intensity to optical light reflection intensity. By using optical sensors that can detect the intensity of reflected light from fog particles, the system achieves reliable fog density measurement across all fog conditions without being limited by the number of reflection points.
2Measurement precision
If the rate of second reflection points is used to determine fog presence, then fog can be identified, but measurement precision deteriorates when fog density is high due to low number of second reflection points
Solution Approach 1:
The patent substitutes electromagnetic wave detection with optical detection. Optical sensors provide sufficient reflection points even in high-density fog, enabling precise measurement of fog density through the distribution of distances between first and second reflection points without relying on the rate of second reflection points.
Solution Approach 2:
The patent introduces a new measurement dimension by analyzing the distribution of distances between reflection points rather than solely relying on the rate of second reflection points. This spatial distribution analysis provides precise fog density measurement even when the number of reflection points is high, overcoming the limitations of traditional rate-based methods.
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 apparatus effectively determines fog density by analyzing the distribution of distances between reflection points, providing accurate and reliable fog detection across varying densities.
Implementation Method 1
an optical sensor that receives reflected light of an emitted light beam reflected at the reflection points
Data Source
AI summary
A point data acquisition unit acquires a set of point data indicating reflection points obtained by an optical sensor that receives reflected light of an emitted light beam reflected at the reflection points. Point data is a pair of first point data indicating a first reflection point, which is a reflection point of a given light beam, and second point data indicating a second reflection point, which is a reflection point at which the intensity of reflected light of the given light beam is lower than that at the first reflection point. A fog determination unit determines the density of fog based on a distribution of a distance between the first reflection point and the second reflection point concerning the point data included in the acquired set.