Sonar System with Integrated Forward-Looking and Down-Looking Transducers
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Solution Overview
Problem
Existing sonar systems for boats compromise navigation and fish-finding capabilities due to interference between different sonar types, such as forward-looking, down-looking echosounders, and side-scanning sonar, limiting their simultaneous use and effectiveness.
Innovation Solution
A sonar system integrating forward-looking sonar with down-looking echosounders and side-scanning sonar, using a transducer module with a processing module that synchronizes and processes data from multiple sonar modalities to provide a comprehensive, interference-free 3D view of the seafloor and surroundings, allowing for reliable navigation and fish detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple sonar types (forward-looking, down-looking echosounder, side-scanning sonar) are installed on a boat, then comprehensive sonar coverage is achieved, but signal interference occurs and navigation reliability deteriorates
Solution Approach 1:
The patent divides the sonar system into separate functional modules (forward-looking sonar, down-looking echosounder, side-scanning sonar) that operate independently with dedicated transducers and signal processing channels. This segmentation prevents signal interference while maintaining comprehensive coverage, as each module processes its own acoustic signals without mutual interference.
Solution Approach 2:
The patent integrates multiple sonar types into a unified system with a common control unit and integrated display interface. The processing unit coordinates all sonar modules to operate simultaneously without interference, merging their capabilities into a comprehensive navigation and fish-finding system that presents unified information to the operator.
2Adaptability or versatility
If multiple sonar types are installed on a boat, then comprehensive sonar coverage is achieved, but the number of hull holes and installation complexity increase
Solution Approach 1:
The patent designs a universal transducer module that can perform multiple sonar functions (forward-looking, down-looking, side-scanning) through electronic beamforming and signal processing rather than requiring separate physical transducers. This multi-functional approach reduces the number of hull openings needed while maintaining comprehensive sonar coverage.
Solution Approach 2:
The patent integrates multiple sonar functionalities within a nested hierarchical structure where a central processing unit coordinates subordinate sonar modules. The system nests signal processing, data fusion, and display control within a unified architecture, reducing installation complexity by consolidating components rather than distributing them separately.
3Productivity
If echosounder and side-scanning sonar operate simultaneously, then comprehensive coverage is achieved, but signal overlap and false alarms increase
Solution Approach 1:
The patent implements periodic time-division multiplexing where the echosounder and side-scanning sonar operate in alternating time slots rather than continuously simultaneously. This periodic operation allows both systems to function with high productivity while eliminating signal overlap and false alarms through temporal separation of their acoustic pulses.
Solution Approach 2:
The patent introduces a signal processing intermediary that acts as a mediator between the echosounder and side-scanning sonar systems. This intermediary coordinates the timing and frequency of acoustic pulses from both systems, ensuring they operate harmoniously without mutual interference while maintaining comprehensive coverage efficiency.
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 true 3D forward-looking sonar integration with down-looking and side-scanning capabilities, enhancing navigation and fish-finding capabilities while minimizing interference, allowing for the detection of hazards and fish schools with reduced installation complexity and improved data interpretation.
Implementation Method 1
The transducer can include a plurality of piezoelectric elements or PVDF elements
Implementation Method 2
By calculating the time for the sound to return, the echosounder can reveal the depth of the water as well as the presence and location of fish
Implementation Method 3
a typical down-looking echosounder mounts on the bottom of a boat's hull and uses a narrow acoustic beam to scan the seafloor
Data Source
AI summary
The invention generally relates to sonar devices that integrate forward-looking sensors with down-looking echosounders, side scanning sonar, or both. The invention provides a sonar system that includes a forward-looking sonar device that operates in an integrated fashion with one or more other sonar devices so that a boater can have a reliable navigation tool while also using sonar for finding fish and other features on the seafloor. The forward-looking sonar can include a transducer array that takes a three-dimensional acoustic reading of the objects and seafloor ahead. The electronics that process the acoustic data can also process data from down-looking sonar, side-scanning sonar, or both and can integrate the information to present an expansive display in the boat, revealing the contents and the floor of the sea in front of, around, and under the boat.