Description of the AquaShield Diver Detection Sonar system
The AquaShield DDS is a modular fixed system with sector coverage of 120º, 240º or 360º. Selection of the system configuration is dependent upon the physical dimensions of the site to be protected.
The System can be provided with one of two configurations:
1. System with underwater electronics
2. System with above water electronics
The AquaShield DDS (underwater electronics configuration) is comprised of four units:
Underwater Unit
Processor Unit
Control and Display unit (C&D)
Junction Box
The Underwater Unit is made of:
Underwater Front-end Electronic Unit (UFE)
One - three Receive (Rx) arrays (horizontally mounted)
One Transmit (Tx) array (vertically mounted)
Each Receive array covers a horizontal sector of 120º, so the system can be provided with one of three coverage options:
System with 1 Rx array for coverage of 120º
System with 2 Rx arrays for coverage of 240º
System with 3 Rx arrays for coverage of 360º
The Transmit array coverage is 360º.
Below is a depiction of the Underwater Unit with a sector coverage of 240º (two Rx arrays):
The picture below is an AquaShield DDS pier version for coverage of a 120º sector.
Array Description
The vertical transmit array is 40 cm long. It includes 32 transducer elements.
The horizontal receive array is 125 cm long. It includes 96 pairs of hydrophone elements.
Underwater Unit Durability
The underwater unit is designed to resist and not be damaged by detonation of 0.2 Kg TNT explosive charges at a distance of 5 meter.
Performance and Capabilities:
The Processor Unit is a high performance computer based on PC technology.
It performs advanced acoustic signal processing algorithms:
Receive Beamforming
Detection - two types of processing: Energy detection and Coherent Processing
Automatic detection
Automatic tracking
Automatic classification
Detection ranges are:
Diver with open circuit breathing apparatus up to 1000 m
Diver with closed circuit breathing apparatus up to 700 m
Swimmer Delivery Vehicle (SDV) up to 1500 m
Detection ranges may vary due to adverse acoustic conditions such as:
Non isothermal water (temperature profile with gradient)
Very dirty water
Water with high concentration of mud/sand particles
Bottom with gravel or rocks
Control and Display unit (C&D)
The Control and Display unit is a PC computer with high performance monitor.
It performs the following functions:
Display processing
Tactical picture display
Display of sonar data in graphic, video and alpha-numeric format
System operation by the operator using on screen menus and control devices
The figure below is an example of the Tactical Picture display format presenting a site aerial picture and diver target that is automatically detected, tracked and classified as a diver (the red track).
The figure below is an example of the sonar display format presenting the operation menus, the sonar display windows and a diver target that is automatically detected, tracked and classified as a diver (the red track).
Click to open AquaShield DDS single page info sheet in your language:
For the comprehensive AquaShield DDS brochure and data sheet click the icon below:
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