Ocean bottom floor hydrophones and seismometers

Details Ocean bottom floor hydrophones and seismometers Ocean bottom floor hydrophones and seismometers

G - Physics

01

V

G01V 1/38 (2006.01)

Patent

CA 2498547

The invention concerns an ocean bottom station, such as an ocean bottom hydrophone (OBH) or an ocean bottom seismometer (OBS), designed to perform in situ measurements, comprising a support structure (2, 3) with positive buoyancy wherewith is associated at least one detachable ballast (4) to bring said support structure to the ocean bottom during a measurement session, the support structure including at least one hydrophone (6), one data acquisition unit (7) for recording measurement data from the hydrophone and a device for releasing said detachable ballast. The invention is characterized in that the data acquisition unit (7) serves to control the releasing device in response to an acoustic release command received by the hydrophone (6).

La présente invention concerne une station de fond de mer, telle un hydrophone de fond de mer (OBH) ou un séismomètre de fond de mer (OBS), destinée à effectuer des mesures in situ, comprenant une structure porteuse (2,3) à flottabilité positive à laquelle est associée au moins un lest détachable (4) pour amener ladite structure porteuse au fond de l'eau le temps d'une session de mesure, la structure porteuse comprenant au moins un hydrophone (6), une unité d'acquisition de données (7) pour enregistrer des données de mesure provenant de l'hydrophone et un dispositif de largage dudit lest détachable Selon l'invention, l'unité d'acquisition de données (7) est utilisée pour commander le dispositif de largage en réponse à un ordre acoustique de largage reçu par l'hydrophone (6).

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