PIT-Based Fish School Tracking for Accurate 3D Trajectories
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Solution Overview
Problem
Satellite remote sensing technology for fish school trajectory monitoring in marine ranches is affected by weather factors, leading to reduced accuracy and inability to identify small fish schools or individual fish, compromising the accuracy of trajectory monitoring.
Innovation Solution
Implanting each fish in the target school with a Passive Integrated Transponder (PIT) tag, using a PIT reader to obtain tag information, generating a 3D fish school trajectory map, and employing a motion trajectory correction model to refine the data, resulting in a corrected 3D fish school trajectory map for improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If satellite remote sensing technology is used to monitor fish school trajectory, then large-area monitoring capability is achieved, but measurement precision deteriorates due to weather factors and inability to identify small fish schools or individual fish
Solution Approach 1:
The patent divides the monitoring task into two levels: satellite remote sensing provides large-area coverage for fish school location, while PIT tag readers deployed at specific monitoring points provide precise individual fish identification and trajectory data. This segmentation allows each method to operate in its optimal performance range.
Solution Approach 2:
The patent introduces PIT tags as intermediary devices implanted in fish, which serve as mediators between the satellite remote sensing system and the fish themselves. The tags enable precise identification and tracking without requiring direct optical detection, thereby improving measurement precision while maintaining area coverage.
2Quantity of substance
If satellite remote sensing technology is used for fish school monitoring, then overview monitoring is achieved, but measurement precision deteriorates due to image clarity issues from weather factors
Solution Approach 1:
The patent replaces the optical detection mechanism of satellite remote sensing with an electromagnetic field-based PIT tag reading system. The PIT reader uses electromagnetic fields to detect and identify tagged fish individually, eliminating the image clarity issues caused by weather factors such as cloud cover and sea fog.
Solution Approach 2:
PIT tags act as intermediaries that carry unique identification information, allowing the system to identify individual fish and small fish schools accurately without relying on visual image quality. This intermediary approach bypasses the weather-related limitations of optical sensing.
3Measurement precision
If PIT tags are implanted in each fish and PIT readers are deployed, then measurement precision improves for individual monitoring, but device complexity increases
Solution Approach 1:
The patent extracts the identification function from the complex satellite imaging and image processing system, placing it into simple PIT tags and PIT readers. This extraction simplifies the overall system architecture by separating identification (handled by PIT tags) from location monitoring (handled by satellite and PIT readers).
Solution Approach 2:
The patent uses PIT tags as simplified copies or proxies for fish identification, rather than attempting to directly image and analyze fish visual features. This copying approach dramatically reduces device complexity while maintaining high measurement precision for individual fish monitoring.
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 method enables accurate individual monitoring and enhances the precision of fish school trajectory analysis, providing rich data support for studying fish behavior and migration patterns, and facilitating targeted fishing operations.
Implementation Method 1
the PIT reader is configured to: in response to the fish implanted with the PIT passing through the PIT reader, identify the PIT and generate the PIT tag information
Data Source
AI summary
A passive integrated transponder (PIT)-based fish school trajectory monitoring method and system for a marine ranch are provided. The method includes: using a PIT reader to obtain PIT tag information of each fish of a target fish school during a monitoring period; generating a three-dimensional (3D) fish school trajectory map of the target fish school; generating a motion sequence of each fish, inputting the motion sequence of each fish into a motion trajectory correction model, and outputting a corrected motion sequence of each fish; generating a first corrected 3D fish school trajectory map of the target fish school during the monitoring period, and generating a second corrected 3D fish school trajectory map; and generating motion information of the target fish school, and feeding back the second corrected 3D fish school trajectory map and the motion information of the target fish school to monitoring personnel.