Sonar Imaging with Linear and Circular Transducers
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Solution Overview
Problem
Conventional multibeam sonar systems are complex and costly, with sidescan transducers providing limited coverage of the water column beneath a vessel, while cylindrical transducers offer poor quality images for bottom structure detection.
Innovation Solution
A sonar system combining linear and circular transducers to provide high-quality images of the water column and bottom features, with linear transducers directed downward for detailed column imaging and circular transducers enhancing sensitivity to small objects, and their data combined for an improved downscan sonar display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional multibeam sonar systems are used, then detailed imaging capability is provided, but device complexity and cost increase
Solution Approach 1:
The patent combines linear and circular transducers into a single integrated sonar system. The linear transducer array provides detailed bottom structure imaging while the circular transducer enhances sensitivity to small objects in the water column. By merging these two different transducer types with complementary beam patterns, the system achieves comprehensive imaging capability without requiring separate complex multibeam systems.
2Area of stationary object
If sidescan transducers are used, then side coverage is provided, but water column beneath vessel coverage is limited
Solution Approach 1:
The patent applies different transducer types to different spatial zones: linear transducers are optimized for imaging the bottom structure directly beneath the vessel, while circular transducers are optimized for detecting small objects in the water column. This local specialization of transducer functions ensures high-quality imaging in each specific zone without compromising overall coverage.
3Reliability
If cylindrical transducers are used, then water column detection is provided, but bottom structure image quality deteriorates
Solution Approach 1:
The patent merges cylindrical (circular) transducers with linear transducers to combine their complementary strengths. The circular transducer provides enhanced sensitivity for detecting small objects in the water column, while the linear transducer array delivers high-quality bottom structure imaging. Together they overcome the limitations of using either transducer type alone.
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 combined system offers enhanced sensitivity and clarity for both water column and bottom features, providing a comprehensive and intuitive sonar display that integrates the strengths of linear and circular transducer data, improving navigation and object detection capabilities.
Implementation Method 1
The transducers are often made using piezoelectric materials
Implementation Method 2
The transducers can convert electrical energy into sound energy and also convert sound energy (e.g., via detected pressure changes) into an electrical signal
Implementation Method 3
Any reflected sound then returns to the transducer to form a return signal that may be interpreted as a surface of an object
Data Source
AI summary
Methods, systems, and computer program product are provided herein for generating an image that includes sonar data indicative of an object from a first transducer element, such as a circular transducer element, with sonar data indicative of an underwater environment from a second transducer element, such as a linear transducer element. Example sonar data indicative of a fish includes a fish arch.