Acoustic Devices News

EvoLogics' Sonobot, an autonomous USV for bathymetric surveys. Photo: EvoLogics

MTR100: EvoLogics GmbH

vehicles. They enable retrieving information from various sensors and allow to control complex processes by seamlessly combining communication with highly accurate positioning. Moreover, EvoLogics caters to the needs of scientists, developers and commercial customers with a series of underwater acoustic devices and software tools that offer an open development and testing framework, providing endless opportunities for new implementations. S2C systems have been carefully designed for operations in harsh underwater environments and enhanced with special algorithms for signal processing and data management

Photo: Silicon Sensing Systems Ltd

Silicon Sensing Expands MEMS Foundry in Japan

on the strengths of PinPoint Silicon Sensing has developed its thin film sputtering material and process technology to an advanced level.  Silicon Sensing is supplying its PZT film to a global customer base for use in many varied MEMS devices such as mirrors, inkjet printhead nozzles and acoustic devices.  In many cases Silicon Sensing is an enabler for the transition from use of bulk piezo-electric to thin film, with the associated benefits of economy, size and power consumption.Silicon Sensing SystemsSilicon Sensing Systems Ltd is an inertial sensors and systems engineering company, jointly

Image: EvoLogics

MTR100: EvoLogics

.    They enable retrieving information from various sensors and allow for control of complex processes by seamlessly combining communication with accurate positioning. Moreover, EvoLogics caters to the needs of scientists, developers and commercial customers with a series of underwater acoustic devices and software tools that offer an open development and testing framework, providing endless opportunities for new implementations. S2C systems have been carefully designed for operations in harsh underwater environments and enhanced with special algorithms for signal processing and data management

SIO's pinger on bottom in Caymans, acoustic receiver is used from boat (bottom) with remote hydrophone (top)  (Photo: JW Fishers)

Acoustic Devices Aid Researchers and Marine Scientists

help to solve this problem. These acoustic beacons are attached to an underwater site or instrument package and transmit a sonar signal. A gun-like device, either carried by a diver or deployed from a boat, detects the signal and guides the operator directly to the beacon.   Today these acoustic devices are being employed by many marine scientists and researchers to keep track of expensive oceanographic equipment allowing instruments to be quickly relocated and retrieved.   Scripps Institution of Oceanography (SIO) is one of the oldest and largest facilities in the world for ocean science

Maritime Surveillance in the New Millennium

custom alerting capabilities delivering alarms and threat alerts via email, Short Message Service (SMS), Multi-Media Messaging Service (MMS) and Simple Network Management Protocol (SNMP) to assist operators working with mobile devices. They have incorporated alerting systems such as Long Range Acoustic Devices (LRAD) and AIS with their Radar, Camera and Sonar surveillance systems. With the use of AIS and LRAD, the operator can provide direct notification or warning to the target. The SSR Composite Tracker correlates target information from multiple sensors providing an accurate track picture while

MTR100: EvoLogics GmbH

vehicles. They enable retrieving information from various sensors and allow to control complex processes by seamlessly combining communication with accurate positioning. Moreover, EvoLogics caters to the needs of scientists, developers and commercial customers with a series of underwater acoustic devices and software tools that offer an open development and testing framework, providing endless opportunities for new implementations. S2C systems have been carefully designed for operations in harsh underwater environments and enhanced with special algorithms for signal processing and data management

Members of NCSU Robotics Club, Inset - SAS students with AUV (Image: JW Fishers)

Acoustic Pingers Aid Robosub Contestants

we were unable to accomplish all of the required tasks, our team still managed to score more points that many notable college teams. This project has given us high schoolers an incredible experience, and we look forward to competing again in the future.”   Other teams using Fishers acoustic devices to help design their AUVs for Robosub are from Kasetsart University in Thailand, University of Colorado Boulder, National University of Singapore and India’s Underwater Robotics Society. Other educational institutions using Fishers pingers in their projects are the University of Delaware

Diver with JW Fishers PR-1 acoustic receiver, Inset – Fishers acoustic pinger and transponder (photo courtesy of Steve Barsky)

Relocating Underwater Sites with Acoustic Beacons

changes in the benthic environment. To ensure their oceanographic monitoring instruments can easily be recovered, the institute is using JW Fishers MFT-1 transponders and DHI-1 interrogator.    Helping to relocate underwater sites and oceanographic equipment is not the only use of these acoustic devices. Propipe Ltd in the United Kingdom designs and manufactures pipeline pigs for the oil and gas industry. These “pigs” perform various maintenance operations inside the pipe, and “pigging” is generally done without stopping the flow of material through the pipe. This is

Commercial diver with recovered ADCP & pinger, Inset - diver with PR-1 receiver (Courtesy JW Fishers)

Acoutic Pingers; Not Just for Airplane Black Boxes

; Before deploying an instrument, the SFP-1 pinger is attached to to ensure its safe recovery. The group also employs Fishers TOV-1 towed video system allowing them to create a visual record of the marine ecosystem. Fishers has recently added a new low frequency pinger to its extensive line of acoustic devices. The new model has a significantly longer transmission range (3-6 miles compared to 2,000-3,000 feet for a conventional pinger), a longer battery life, and a variety of other new features including delayed start which allows the pinger to lie dormant for up to a year before beginning to transmit

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