Seine Net Position Mapping with Distributed Depth Sensors
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Solution Overview
Problem
Existing seine net fishing systems rely on limited and expensive acoustical-position sensors to measure the position of the net, leading to inaccurate representation of the net's bottom and perimeter, especially for long nets, which can affect fish capture efficiency.
Innovation Solution
A system utilizing a plurality of sensor modules coupled to the seine net, configured both proximal to the float line and the lead line, to measure depth and sinking rate wirelessly, transmitting data via short-range wireless communication to a computing system upon retrieval, enabling accurate depth and surface profiling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If acoustical-position sensors are used to measure net position, then measurement capability is provided, but cost increases significantly and number of sensors is limited
Solution Approach 1:
The patent replaces acoustical-position sensors with simple depth sensors that measure depth mechanically/physically. This substitution dramatically reduces cost while maintaining measurement capability, allowing numerous sensors to be deployed along the net without the expense of acoustic systems.
Solution Approach 2:
The patent divides the net into multiple segments with individual depth sensors attached to each segment. This segmentation allows distributed measurement along the entire net length, providing comprehensive position data without requiring expensive centralized acoustic sensing systems.
2Device complexity
If limited number of sensors are used due to cost, then device complexity is reduced, but accurate representation of net bottom and perimeter is not achieved
Solution Approach 1:
The patent attaches multiple depth sensors to different segments along the net, enabling distributed measurement. This segmentation provides numerous data points that accurately represent the net's three-dimensional configuration, overcoming the limitations of few expensive sensors.
Solution Approach 2:
The patent uses multiple identical inexpensive depth sensors instead of few expensive acoustic sensors. Each sensor copies the same simple measurement function, and the collective data from many copies provides comprehensive and accurate net position representation.
3Loss of time
If acoustical sensors transmit data through water to the boat, then real-time position data is obtained, but system cost and sensor number are limited
Solution Approach 1:
The patent replaces acoustic data transmission through water with wireless communication that transmits data after retrieval. This substitution eliminates the need for expensive acoustic transmission systems while still providing timely position data for analysis and adjustment.
Data Source
AI summary
A seine net position measurement system utilizes a plurality of sensor modules coupled to the seine net to determine the seine net position by recovering seine net position data, such as depth data, upon retraction of the seine net to the boat. The sensor modules may be configured proximal to the bottom of the net or the leadline. A depth profile of the net, as well as a rate of sinking of the net may be determined from the position data. The sensor modules have a sensor wireless signal transceiver that transmits a wireless signal to a wireless signal transceiver that sends the data to a computer for processing. The computer may be on the boat or part of a cloud computing system. This system is economical and enable a large number of sensor modules to be used to provide better accuracy of the net position.