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Keywords: amplifier
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Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 7–9, 1984
Paper Number: OTC-4815-MS
... operates over an acoustic band of 260 to 650 Hz with a peak source level of 201 dB/l~Pa @1 m. The source system, a Helmholtz resonator transducer and power amplifier system, has been tested to a depth of 4500 m. The streamer is an oil-filled hose design with 48 active groups spaced over its 1000 m length...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 5–7, 1974
Paper Number: OTC-2013-MS
... to control the average vane angle (through the motor amplifier and motor) which positions the vehicle to the proper height. Normally, the sonar provides new vehicle height information once every second. To prevent the vehicle from bottoming onto the ocean floor, a minimum height feature is included. A diode...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 5–7, 1974
Paper Number: OTC-1965-MS
... noisy, a small portable generator was installed on deck. All recording equipment was located in the cabin. A calibrated hydrophone with built-in preamplifier was used, and its output amplified by an adjustable gain coup- ler and three parallel outputs to three separate variable gain bandpass amplifiers...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 5–7, 1974
Paper Number: OTC-2007-MS
... engineer amplifier preamplifier frequency texas instruments mobile control unit chassis operation subsystem rf subsystem mobile station marine navigation system control unit range marine navigation system ship mhz upstream oil & gas OFFSHORE TEC1:lNOLOGY~ CONFERENCE 6200 North...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, May 5–7, 1974
Paper Number: OTC-1973-MS
... reliability alarm system fluidic system tank electronic system valve upstream oil & gas edge sensor personnel fluidic instrumentation institute amplifier acceptance pump stroke instrumentation simple inexpensive solution engineer fluidic device reservoir characterization...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 2, 1972
Paper Number: OTC-1558-MS
... surface-moored vertical barrier computer solution upstream oil & gas amplifier bridle line water velocity voltage reservoir characterization coefficient engineer inertial force wave action stiffness analog scale factor OFFSHORE TECHNOLOGY CONFERENCE 6200 North Central Expressway...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 30–May 2, 1972
Paper Number: OTC-1642-MS
... playback otc 1642 differential amplifier fm transmitter voltage upstream oil & gas wave direction amplifier data acquisition system engineer OFFSHORE TECHNOLOGY CONFERENCE 6200 North Central Expressw~ Dallas, Texas 75206 THIS IS A PREPRINT SUBJECT TO CORRECTION : OTC 1642 A Low Cost Data...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 18–20, 1971
Paper Number: OTC-1444-MS
.... The taking of such large quantities of measurements can be costly, and it is the purpose of this paper to suggest a method by which such costs can be reduced. engineer hysteresis statistical strain loading otc 1444 comparator amplifier excursion strain gauge drilling equipment block diagram...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 18–20, 1971
Paper Number: OTC-1457-MS
... beam transducer array is shown in Fig. 2. upstream oil & gas digitizer crt display hydrophone time mark crosstrack profile amplifier ping cycle graphic recorder computer transducer receiver multi-beam sonar reservoir characterization beam pattern sun system ship...
Proceedings Papers
Publisher: Offshore Technology Conference
Paper presented at the Offshore Technology Conference, April 21–23, 1970
Paper Number: OTC-1242-MS
... ABSTRACT A general purpose hydrophone has been developed which £features high sensitivity, wide band operation, and high pressure capability. An internal preamp overcomes the usual problems related to cable noise and cable capacitance. The internal battery is charged through the amplifier...