Patent ID: 9557431
Date: 2017-01-31
CPC Classifications: G01V

Claim:
1. A seismic data acquisition system comprising: a first digital seismic sensor; a second digital seismic sensor; a two-conductor line connecting the first digital sensor to the second digital seismic sensor; and a seismic acquisition device connected to the two-conductor line, wherein the first and second digital seismic sensors send seismic data to the seismic acquisition device along the two-conductor line, the seismic acquisition device sends power to the first and second digital seismic sensors along the two-conductor line, and the first digital seismic sensor comprises: a digital accelerometer that measures the seismic data; a local sampling clock that generates a sampling frequency for the digital accelerometer; a receiver configured to receive, along the two-conductor line, synchronization information providing timing information to enable first digital seismic sensor synchronization and also configured to receive command data from the acquisition device; a transmitter that transmits the seismic data, along the two-conductor line, to the acquisition device; a processor that drives the receiver and the transmitter, according to a half-duplex transmission protocol over the two-conductor line, and compensates, as a function of the synchronization information, a drift of the local sampling clock; a power unit that receives power over the two-conductor line; and a coupling unit that connects the power unit, receiver and transmitter to the two-conductor line.