Underwater Detection Device Bottom Edge Correction
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Solution Overview
Problem
Existing underwater detection devices struggle to accurately display the bottom of a water body and distinguish it from target objects like fish schools, leading to deteriorated stereoscopic visibility due to similar signal intensities.
Innovation Solution
The device employs an image generation module that displays the bottom in a distinct color from the detection image, allowing for clear differentiation. Additionally, an edge calculation module adjusts the edge position based on a coefficient or threshold value, enhancing the visibility of target objects near the bottom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the transmission beam is incident obliquely with respect to the bottom, then the detection range is improved, but the three-dimensional image of the bottom is displayed with both ends lifted in a V-shape than the position of the actual bottom
Solution Approach 1:
The patent introduces an edge position as an intermediary element between the actual bottom and the displayed bottom image. By detecting the edge position of the bottom echo and using it to correct the displayed bottom position, the system mediates between the oblique transmission beam's detection capability and the need for accurate bottom positioning, thereby resolving the V-shaped distortion while maintaining detection range
Solution Approach 2:
The patent changes the parameter used for bottom display from the center of the bottom echo to the edge position of the bottom echo. This parameter change allows the system to compensate for the beam width effect and correct the V-shaped distortion in the bottom image, improving measurement precision without sacrificing detection range
2Reliability
If the signal intensity of the bottom and the signal intensity of the fish school or the like are approximate to each other, then the detection sensitivity is improved, but the fish school or the like is assimilated to the bottom, and the stereoscopic visibility of the fish school or the like is deteriorated
Solution Approach 1:
The patent applies local quality by making the bottom display different from the target display. Specifically, the bottom is displayed using corrected position information based on edge detection, while targets are displayed using their actual signal intensity positions. This local differentiation in display methodology allows both bottom and targets to be visible even when their signal intensities are similar, preventing assimilation and maintaining stereoscopic visibility
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
This configuration enables proper display of the bottom and improved visual recognition of both the bottom and target objects, reducing the assimilation of targets with the bottom and enhancing stereoscopic visibility.
Implementation Method 1
a transmission transducer and a reception transducer for transmitting and receiving ultrasonic waves are installed at the bottom of the ship
Implementation Method 2
the signal intensity (volume data) of the reflected waves is acquired for a three-dimensional detection range
Data Source
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AI summary
The purpose is to provide an underwater detection device (10) and an underwater detection image generation method capable of properly displaying a bottom and visually recognizing the states of the bottom and a target. The underwater detection device (10) includes a bottom detection module (17a) that detects a bottom position based on an echo data indicating a signal intensity of a reflected wave, an edge calculation module (17b) that calculates an edge position of a bottom echo with respect the bottom position, a correction module (17d) that calculates a correction data in a range from a transmission position to the bottom position based on the echo data between the transmission position and the edge position, and an image generation module (17e) that generates a detection image in a display mode corresponding to the signal intensity of the correction data and a bottom image in a display mode different from the detection image based on the bottom position.