Underwater Sensor Arrays Linearized by Distributed Buoyancy
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Solution Overview
Problem
Underwater sensor arrays tend to form curved shapes in ocean currents, complicating beam forming algorithms and reducing signal processing efficiency, making location estimates less accurate and impeding identification.
Innovation Solution
Distributing buoyancy throughout the sensor array by using slightly negatively or positively buoyant sensors along the length of the cable, rather than concentrating it at the bottom or top, to maintain a linear shape in currents of varying strengths and speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If buoyancy is concentrated at the top or bottom of the sensor array, then the array can be anchored or suspended, but the array forms a curved shape in ocean currents
Solution Approach 1:
The patent divides the concentrated buoyancy into multiple distributed buoyant elements along the cable length. Instead of one large buoyant object at the top or bottom, the system uses multiple smaller buoyant elements spaced throughout the array, creating segmented buoyancy distribution that maintains linear shape while providing stability.
Solution Approach 2:
The patent applies different buoyancy characteristics to different segments of the array. Each section of the cable has locally optimized buoyancy properties, with buoyant elements distributed at specific intervals to create uniform tension distribution along the entire array length, maintaining linearity in current conditions.
2Measurement precision
If a traditional weighted-bottom sensor array is used, then the array can be anchored, but beam forming algorithms become complex and location estimates are less accurate
Solution Approach 1:
The patent creates a more uniform potential distribution along the array by distributing buoyancy elements throughout the cable. This equipotential-like distribution of tension forces creates a linear array geometry that simplifies the mathematical models used in beam forming algorithms, improving location estimation accuracy while reducing computational complexity.
3Force
If neutrally buoyant sensors are used with bottom weight and top buoyancy, then the cable tension is created, but the tension is not uniformly distributed causing curved shape
Solution Approach 1:
The patent segments the concentrated buoyant force into multiple distributed buoyant elements along the cable. This segmentation creates multiple smaller tension forces distributed throughout the array, resulting in more uniform tension distribution that maintains linear shape while providing adequate cable tension for sensor stability.
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
This approach ensures more consistent and localized tension, enhancing the accuracy of location estimates and processing efficiency by maintaining a linear array shape in ocean currents.
Implementation Method 1
Distributing buoyant elements throughout the length of the array generates more consistent, uniformly distributed tension, enabling the sensor array to maintain a linear shape in currents of substantially all strengths and speeds
Data Source
AI summary
A system and method for linearizing underwater sensor arrays is disclosed. The sensor array comprises slightly positive or negative buoyant sensors that are positioned along a cable. A weight is positioned at a deep end of the cable or a buoyant object is positioned at a shallow end of the cable, but not both. Distributing buoyant elements throughout the length of the array generates more consistent, uniformly distributed tension, enabling the sensor array to maintain a linear shape in currents of all strengths and speeds.