Digital air gun source controller apparatus and control method

G - Physics – 01 – V

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G01V 1/38 (2006.01) G01V 1/04 (2006.01)

Patent

CA 2478185

An in-water distributed control system for use in marine seismic survey. The system includes a shipboard interface and power supply coupled to an in-water subsystem via a high bandwidth communication link. The in-water subsystem includes a remote control module (24) for generating firing commands based on synchronizing and position parameters transmitted by the interface (14). The remote control module transmits power, data, and commends to a plurality of gun control modules. Each gun control module operates an air gun. An individually addressable remote cut-off valve controls air to each air gun. Depth and pressure at the gun control module is sensed by at least one DT/PT module. An optional expansion unit provides additional DT/PT capability.

L'invention porte sur un système réparti de commande immergé de prospection sismique comprenant une interface de bord et une alimentation reliée à un sous-système immergé par une liaison de communication à grande largeur de bande. Le sous-système immergé comporte un module de télécommande produisant les ordres de tir en fonction de paramètres de synchronisation et de position fournis par l'interface. Le module de télécommande fournit l'énergie, les données et les ordres aux différents modules de commande des canons qui commandent chacun un canon. Une vanne d'arrêt télécommandable individuellement règle l'air alimentant chaque canon. La profondeur et la pression de chaque module de commande sont détectée par au moins un module DT/PT auquel une extension facultative confère des capacités de DT/PT supplémentaires.

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