Fish Weight Calculation Using Ultrasound Incidence Angle Compensation
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Solution Overview
Problem
Existing fish weight calculation methods using ultrasound in fish finders are inaccurate due to variations in ultrasound incidence angle, which affects the distance measurement between the swimbladder and the back of the fish.
Innovation Solution
A target size calculation device that includes a transducer, fish tracking module, ultrasound incidence angle calculation module, distance calculation module, and fish weight calculation module, which calculates the fish weight based on the ultrasound incidence angle and the distance between the swimbladder and the back of the fish.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional fish weight calculation methods are used, then the calculation process is simple, but the measurement precision deteriorates due to variations in ultrasound incidence angle
Solution Approach 1:
The patent calculates the ultrasound incidence angle in advance by tracking the fish's position and orientation before performing weight calculation. This preliminary calculation of the angle allows the system to compensate for angular variations during the actual measurement, improving precision without requiring complex real-time adjustments during weighing
Solution Approach 2:
The patent dynamically adjusts the weight calculation by incorporating the calculated ultrasound incidence angle into the measurement process. Instead of using a fixed calculation method, the system adapts the calculation based on the fish's actual orientation and the angle at which ultrasound waves penetrate the fish, thereby maintaining high measurement precision across varying conditions
2Object-affected harmful factors
If remote measurement without physical contact is used, then the fish are not stressed or hurt, but the measurement precision deteriorates due to varying ultrasound penetration directions
Solution Approach 1:
The patent employs a feedback mechanism where the fish's position and orientation are continuously tracked using ultrasound echoes. This tracking information provides feedback about the ultrasound incidence angle, which is then used to adjust and compensate for measurement errors, maintaining high precision in remote measurements without requiring physical contact with the fish
Solution Approach 2:
The patent changes the calculation parameters by incorporating the ultrasound incidence angle into the weight calculation formula. By adjusting the calculation to account for the angle at which ultrasound waves penetrate the fish, the system maintains measurement precision while continuing to use non-contact remote measurement 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 device improves the accuracy of fish weight calculation by considering the ultrasound incidence angle, reducing errors associated with varying penetration directions of ultrasound waves.
Implementation Method 1
a transducer configured to transmit a transmission wave toward underwater targets and generate an echo signal from a reflection of the transmission wave on the underwater targets
Implementation Method 2
The fish tracking module is configured to track in time a fish among the underwater targets from echo signals resulting from different transmission waves
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
A target size calculation device includes a transducer (22) for transmitting a transmission wave toward underwater targets and generating an echo signal from a reflection of the transmission wave on the underwater targets, a fish tracking module (25) for tracking in time a fish among the underwater targets from echo signals resulting from different transmission waves, an ultrasound incidence angle calculation module (26) for calculating, for each position of the tracked fish, an ultrasound incidence angle of the transmission wave on the tracked fish based on the echo signals, a distance calculation module (27) for calculating, for each position of the tracked fish, a distance between a swimbladder of the tracked fish and a second body part of the tracked fish from the echo signals of the tracked fish, and a fish weight calculation module (30, 901) for calculating a weight of the tracked fish based on the ultrasound incidence angle and the calculated distance.