![]() ![]() The system provides active and passive acoustic measurements directivity patterns can be provided for receivers and transmitters along with accurate measurement of harmonic distortion of transmitted and received signals. THAMES integrates control and measurement software with sophisticated Hewlett Packard (HP) VXI data gathering modules and all required supporting instruments and controls.Ĭontinuous wave, pulse, and arbitrary waveform generation are available. THAMES is a Windows system based on LabVIEW. Each of these carriages can be independently positioned along the axis of the tank.Ī six channel Transducer and Hydrophone Acoustic Measurement and Evaluation System (THAMES) provides the APTF with a fully integrated, computerized, automated acoustic test setup, control, data gathering, and analysis capability. The rigging weight limit of this latter carriage is 27 kilograms. The third carriage contains a motorized positioning system with full 360 degree azimuthal control and vertical control over a 202 millimeter height. Two of the three carriages can accommodate devices up to 45 kilograms. An underwater rotator located below the large port (1.85 meters in diameter) allows devices and/or material samples of up to 2700 kilograms to be rigged. An external rotator located above the small port (0.84 meters in diameter) can accommodate devices and/or material samples up to 1180 kilograms. The APTF offers a wide range of rigging options. An external coating on the tank provides thermal insulation. ![]() The tank is suspended on air bags to minimize ground borne noise. The monolayer tank wall construction allows quiet pressure cycling for extraneous noise evaluation. The tank is lined on one end with sound absorbing wedges to reduce reverberation and allow the use of high pulse repetition rates. The larger port is 1.85 meters in diameter, atypically large for a tank of this size. The APTF contains a closed steel tank 3.81 meters in diameter and 11.1 meters in length with two access ports. It has the capability for extensive acoustic, mechanical, and electrical measurements. The facility can provide measurements of the acoustic characteristics of sonar system components and other underwater acoustic devices and materials, including (but not limited to) transducers, hydrophones, small arrays, baffles, coating materials, and windows. The APTF includes a large water filled tank with a three carriage positioning system, three independent rotators, and a fully automated data gathering system. Temperatures from 2 degrees Celsius to 35 degrees Celsius and hydrostatic pressures up to 18.6 megapascals (2700 pounds per square inch), corresponding to depths up to 1860 meters, are available. ![]() The Acoustic Pressure Tank Facility (APTF) of the Naval Undersea Warfare Center (NUWC) Division Newport provides acoustic testing over a wide range of simulated ocean environments. ![]()
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