Personnel
Support personnel
Laboratory Infrastructure
- Experimental Tank (2,5m x 1,5m x 1,3m)
- Electronically controlled system of axes with two independent arms and four degrees of freedom
- A pulser-receiver, a waveform generator and an oscilloscope
- Signal Amplifiers
- Data Acquisition cards (on board and USB)
- Six pairs of Ultrasonic transducers (200-700kHz)
- Five laboratory omni-directional hydrophones (10Ηz -120kHz)
Infrastructure for in situ (open sea) experiments
- Portable 16 channel signal acquisition system, portable waveform generator with amplifier and low frequency sound source.
- Two towed array systems with three and two hydrophones respectively.
- Omni-directional hydrophones suitable for use in the sea environment (10Ηz -280kHz)
- 2 pingers + 2 transponders
Recently an electronics workbench has been developed for the support of the laboratory instrumentation, which is capable of manufacturing small electronic components such as sound filters, electronic thermometers etc.
Applications
- Wave propagation experiments – medium range and short range simulations.
- Bottom reconstruction experiments – layer identification and acoustic parameters estimation
- Hydrophone calibration
- Acquisition, recording and analyzing of sounds produced by sea creatures (fishes, cetaceans etc) in tanks or in the open sea.
- Acquisition, recording and analyzing of sounds produced in the sea environment (ship noise etc)
Future applications may include:
- Target recognition and identification
- Ultrasonic Inspection
- High resolution Ultrasonic scanning
Collaboration and Projects
- Laboratoire de Mécanique et d'Acoustique (LMA) CNRS, Marseille France. Close collaboration in the framework of Greek-French bilateral cooperation.
- Ecole Naval Brest France. Three collaborations in the framework of practical training of French Naval Academy students duration of three months.
- Université de Marseille. Two collaborations in the framework of practical training of French students (two months duration).
- Pelagos Institute. Participation in field trips for the recording of sounds produced by cetaceans in the Ionian Sea and Southwest Crete.
- University of Crete, Biology Department and technical University of Crete (TEI). Collaboration in the framework of project Archimedes.
Services Provided
- Laboratory Experimental data.Data recorded during high quality experiments can be used in order to verify theoretical models of sound propagation or sound reflections
Possible users: Universities, Research centers.
- Experimental data from the sea environment.Sounds acquired and recorded in the sea environment or in fish breeding-farming sites.
Possible users: Navy, Institutes of sea biology, fish breeding companies, environmental studies agencies
- Instrument Calibration. Calibration in the laboratory of acoustic devices such as hydrophones, transducers, sounds sources etc. Possible users: Navy, Shipping companies.
- Experimental data database. The laboratory is creating a user friendly
Web server for Hydro-Acoustics Laboratory Experiments (W.H.A.L.E.) where scientists and researchers can log in and retrieve data from experiments performed in the laboratory with complete instructions for using the server and downloading data.
|
|
