Optical Shallow Water Mine Detection via Spectral Analysis
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Solution Overview
Problem
Current methods for detecting sea mines in shallow water depths are inefficient and unreliable due to ambient noise, reflections, and the difficulty in accessing these areas with conventional mine-hunting ships, making it challenging to quickly and accurately locate mines in shallow water environments.
Innovation Solution
A method utilizing an aircraft equipped with optical detection devices, capturing image series with spectral resolution, performing disturbance factor analysis, contrast adjustment, image segmentation, and identifying potential mine positions, which allows for the detection of mines both on and below the surface, including bottom and anchor mines, by calculating water depth from spectral information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If acoustic methods (sonar) are used for mine detection, then detection capability in deep water is improved, but detection reliability in shallow water deteriorates due to ambient noise and reflections
Solution Approach 1:
The patent replaces acoustic detection methods (sonar) with optical detection methods (imaging sensors). This substitution eliminates the harmful effects of ambient noise and acoustic reflections that plague shallow water sonar operations. The optical system captures images of the water surface and subsurface, processing these images to detect mines without being affected by acoustic interference.
Solution Approach 2:
The patent changes the detection parameter from acoustic signals to optical signals. By using imaging sensors that capture light reflected from or transmitted through water, the system operates in a parameter space (optical domain) that is not affected by acoustic noise and reflections, thereby improving reliability in shallow water environments.
2Reliability
If conventional mine-hunting ships are used, then detection capability is improved, but accessibility to shallow water areas deteriorates
Solution Approach 1:
The patent replaces heavy conventional mine-hunting ships with lightweight aerial platforms (drones, UAVs). These aerial vehicles can access shallow water areas that are inaccessible to ships, including beaches, estuaries, and coastal zones. The optical sensors on these platforms maintain detection capability while providing unmatched accessibility to shallow water environments.
3Productivity
If optical detection is used, then detection speed is improved, but detection reliability deteriorates due to water depth variability
Solution Approach 1:
The patent uses spectral analysis to determine water depth parameters, then adapts the detection algorithm accordingly. By measuring the spectral characteristics of light transmitted through or reflected from water, the system calculates water depth and adjusts its detection thresholds and parameters to maintain reliability across varying depths while preserving the speed advantage of optical detection.
Solution Approach 2:
The system incorporates feedback loops where detection results are continuously refined based on water depth information derived from spectral analysis. The algorithm adjusts detection parameters in real-time based on measured water conditions, ensuring reliable mine detection across the full range of shallow water depths while maintaining high detection speed.
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
Enables rapid and reliable detection of sea mines in shallow water depths, improving the efficiency and accuracy of mine detection, and allowing for the identification of mines that are completely covered with water, thereby enhancing safety and reducing the risk associated with mine clearance operations.
Implementation Method 1
capturing an image series, wherein the image series comprises 3 to 100 individual images, wherein at least one pixel is captured with spectral resolution
Implementation Method 2
spectral information of the sunlight and the spectral information of the reflected light are recorded
Data Source
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Figure 3
AI summary
The present invention relates to a method for detecting mines 30 below the water surface in shallow water, the method comprising the following steps: a) flying an aircraft 10 over a suspect region, an aircraft 10 having at least one first optical detection device 40 being selected as the aircraft 10, b) capturing a series of images, the series of images comprising 3 to 100 individual images, c) performing a disruptive factor analysis of the image series to eliminate surface effects, d) adjusting the contrast of the individual imagese) segmenting the image, f) selecting image segments having a predefined size and a predefined form, g) identifying the position of a potential mine 30.