Sonar Transducer Assembly Interference Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multi-beam sonar systems experience interference between transducer elements, which negatively affects the display quality of sonar returns, requiring complex systems to manage multiple transducers and resulting in suboptimal image quality.
Innovation Solution
A sonar system with a transducer assembly featuring a linear downscan transmit/receive transducer element and at least one sidescan receive-only transducer element, configured to minimize interference by using sound-attenuating materials and shields to control the transmission and reception of sonar pulses, allowing for reduced overlap and improved image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple transducer elements are used to enable multi-beam sonar systems, then the coverage area and functionality are improved, but interference between transducer elements occurs and image quality deteriorates
Solution Approach 1:
The patent divides the transducer assembly into functionally separate segments: a downscan transducer element for transmitting and receiving sonar pulses in the downward direction, and sidescan transducer elements positioned at angles for receiving sonar returns from lateral directions. This segmentation allows each element to operate in its designated spatial zone, reducing interference while maintaining comprehensive coverage area.
Solution Approach 2:
The patent applies different operational characteristics to different parts of the transducer assembly. The downscan element is configured as transmit/receive with specific beam patterns, while sidescan elements are configured as receive-only with different angular orientations. This local differentiation optimizes performance in specific directional zones while minimizing cross-interference between elements.
2Adaptability or versatility
If complex systems are used to manage multiple transducers, then multi-beam functionality is achieved, but system complexity increases
Solution Approach 1:
The downscan transducer element serves multiple functions: it transmits sonar pulses downward, receives direct downward reflections, and its transmitted pulses are also detected by the sidescan elements for lateral imaging. This multi-functionality reduces the need for separate dedicated transducers for each function, thereby reducing overall system complexity while maintaining multi-beam capabilities.
Solution Approach 2:
The patent combines the transmit and receive functions in the downscan element, and integrates both downscan and sidescan functionalities within a single transducer assembly housing. This merging approach consolidates multiple functions into unified components, reducing the number of separate systems needed and simplifying overall system architecture.
3Area of stationary object
If transducer elements are positioned close together, then the assembly size is reduced, but interference and overlap between elements increases
Solution Approach 1:
The patent positions sidescan transducer elements at angular offsets relative to the downscan element, utilizing three-dimensional spatial arrangement rather than simple linear spacing. This angular/dimensional separation allows elements to be positioned efficiently within a compact assembly volume while maintaining adequate acoustic isolation through directional beam separation in three-dimensional space.
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 solution significantly reduces interference between transducer elements, enhancing sonar image quality by minimizing overlap and maintaining effective coverage areas, resulting in clearer and more accurate sonar data displays.
Implementation Method 1
Sonar transducer elements, or simply transducers, may convert electrical energy into sound or vibrations at a particular frequency
Implementation Method 2
The transducer may receive the reflected sound (the 'sonar returns') and convert the sound energy into electrical energy
Implementation Method 3
configured to minimize interference by using sound-attenuating materials and shields to control the transmission and reception of sonar pulses
Data Source
AI summary
A sonar transducer assembly includes a housing mountable to a water craft capable of traversing a surface of a body of water. The sonar transducer assembly includes a linear downscan transmit/receive transducer element positioned within the housing, aimed downwardly, and configured to transmit sonar pulses in the form of a fan-shaped beam perpendicular to a plane of the surface of the water, and further configured to receive sonar returns from the sonar pulses and convert sound energy of the sonar returns into downscan sonar return data. The sonar transducer assembly also includes at least one sidescan receive-only transducer element positioned within the housing, aimed outwardly and downwardly, and configured to receive sonar returns from the sonar pulses and convert sound energy of the sonar returns into sidescan sonar return data.