The Multichannel Acoustic Telemetry System

Author

Zielinski, Adam ; Jacobs, William ; Howse, D.

Author_Institution

Fac. of Eng. & Appl. Sci., Memorial Univ. of Newfoundland, St. John´s, NL, Canada

fYear

1981

fDate

16-18 Sept. 1981

Firstpage

40

Lastpage

42

Abstract

An acoustic system to measure a descent velocity of a self-contained instrument package is described in this paper. The system Is also capable of transmitting two additional time variables. The velocity measurement is based on the Doppler frequency shift of an acoustic signal, while the two other channels use frequency modulated carriers. Errors introduced by heave of a receiving hydrophone is compensated by an integrated signal derived from an accelerometer placed in the hydrophone housing. The results from sea trials are presented and the system performance is evaluated.

Keywords

Doppler shift; accelerometers; acoustic signal processing; frequency modulation; hydrophones; telemetry; velocity measurement; Doppler frequency shift; accelerometer; acoustic signal processing; frequency modulated carrier; hydrophone housing; integrated signal; multichannel acoustic telemetry system; self contained instrument package; velocity measurement; Accelerometers; Acoustic measurements; Frequency modulation; Instruments; Packaging; Sea measurements; Sonar equipment; System performance; Telemetry; Velocity measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

OCEANS 81

Conference_Location

Boston, MA

Type

conf

DOI

10.1109/OCEANS.1981.1151456

Filename

1151456