Multispectral Sonar Array for Simultaneous Survey Missions
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Solution Overview
Problem
Existing underwater survey systems face challenges in improving data quality and diversity while reducing the time required for surveys, despite advancements like multibeam echo sounders, due to the costs and complexities of building and testing new equipment.
Innovation Solution
A multibeam echo sounder system using a single array of transmitting transducers and receiving transducers arranged in a Mills Cross configuration, which synthesizes multiple frequency bands to perform multiple survey missions simultaneously, enabling efficient data collection from water bodies by ensonifying different frequency-dependent characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple survey missions are performed using separate equipment systems, then data quality and diversity are improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent implements a single transducer array system that performs multiple survey missions (bathymetry, water column characterization, seafloor characterization) by transmitting acoustic signals at different frequencies. The same physical hardware executes diverse functions through frequency-based signal differentiation, eliminating the need for separate specialized equipment for each survey type.
Solution Approach 2:
The system changes the frequency parameter of acoustic signals to differentiate between various survey missions. By transmitting at specific frequency bands (e.g., low frequency for bathymetry, high frequency for seafloor characterization), the single transducer array adapts its function without physical reconfiguration, resolving the contradiction between versatility and complexity.
2Productivity
If traditional single-frequency sonar systems are used, then device simplicity is maintained, but survey time and productivity are reduced
Solution Approach 1:
The system transmits multiple frequency signals simultaneously or in rapid succession through the same transducer array, allowing continuous data collection for multiple survey missions without idle time between separate survey operations. This continuous multi-frequency transmission significantly reduces total survey time compared to sequential single-frequency operations.
Solution Approach 2:
The patent combines multiple survey missions into a single integrated operation using one transducer array transmitting multi-frequency signals. By merging bathymetry, water column, and seafloor characterization into one simultaneous process, the system achieves high productivity without the time loss associated with separate survey operations.
3Loss of information
If multiple transducer arrays are deployed for different survey missions, then data diversity is improved, but ease of operation and system simplicity deteriorate
Solution Approach 1:
The single transducer array is designed to perform multiple survey functions by varying signal frequency. This universal system provides diverse data (bathymetry, water column, seafloor information) while maintaining operational simplicity, as users control a single system rather than coordinating multiple separate arrays.
Solution Approach 2:
The system achieves data diversity by changing the frequency parameter of transmitted signals rather than deploying multiple physical arrays. This approach maintains ease of operation since all diverse data collection is managed through a single system with frequency-based mission selection, avoiding the complexity of operating multiple independent arrays.
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 system allows for simultaneous collection of diverse survey data from various water environments, enhancing data quality and reducing survey time by utilizing a single array to perform multiple missions, including bathymetric, water column, and seafloor characterization surveys.
Implementation Method 1
transducer arrays to project sound or pressure waves through a liquid medium and transducer arrays to receive corresponding echoes from features that scatter and/or reflect impinging waves
Implementation Method 2
the projector array arranged with respect to the hydrophone array to form a Mills Cross
Data Source
AI summary
A survey system including a transmitter, receiver, projector array and hydrophone array transmits and receives sound waves to perform one or more survey missions.