Sercel Inc.

Jacques Hamon

Daniel Pennec

Jean-Paul Menard

Pierre Sagot

A digital seismic sensor adapted to be connected, via a two-conductor line, to an acquisition device. The digital seismic sensor includes: a digital sensor; a local sampling clock providing a sampling frequency; a receiver for receiving command data coming from the acquisition device and synchronization information providing accurate timing information to enable seismic sensor synchronization; a compensator for compensating, as a function of the synchronization information, a drift of the local sampling clock; a transmitter for transmitting seismic data towards the acquisition device; a driver for driving the receiver and the transmitter, according to a half-duplex transmission protocol over the two-conductor line and using a transmission clock extracted from the received command data; a power receiver for receiving electrical power; and a coupler for coupling the command and synchronization information receiver, the transmitter and the power receiver to the two-conductor line.

Digital seismic sensor and acquisition device adapted to be connected together via a two-conductor line

The invention relates to a device, a method and an apparatus for acquiring data, the device comprising a wireless network including a set of nodes (), each node () including a sender () and a receiver () for sending and/or receiving and/or relaying data and/or commands, and a satellite positioning system (), characterized in that each satellite positioning system () includes means for providing specific data used for time-stamping the data relative to a common time reference, organizing an access to the wireless network in a perfectly controlled manner, and routing data and/or commands within the network.

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Nantes, France

Jacques Hamon