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US 8,136,383 B2Granted
Calibrating an accelerometer
AssigneeWesternGeco L.L.C.
InventorsNicolas Goujon, Ahmet Kemal Ozdemir, Bent Andreas Kjellesvig
Life of this patent
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Abstract
To calibrate an accelerometer, a seismic cable that carries the accelerometer is rotated. Data measured by the accelerometer as the seismic cable is rotated is received, and at least one calibration parameter according to the received data is computed. The at least one calibration parameter is for use in calibrating the accelerometer.
Claims20
A method of calibrating an accelerometer, comprising:
- rotating a seismic cable that carries the accelerometer;
- receiving measurement data measured by the accelerometer as the seismic cable is rotated;
- identifying a first amplitude and a second amplitude in the received measurement data, wherein the first amplitude corresponds to a first gravity value, and the second amplitude corresponds to a second gravity value;
- and
- computing at least one calibration parameter according to the identified first amplitude and second amplitude, the at least one calibration parameter for use in calibrating the accelerometer.
2 more elements
A method of calibrating an accelerometer, comprising:
- rotating a seismic cable that carries the accelerometer;
- receiving measurement data measured by the accelerometer as the seismic cable is rotated;
- and
- computing at least one calibration parameter according to the received measurement data, the at least one calibration parameter for use in calibrating the accelerometer, wherein computing the at least one calibration parameter according to the received measurement data comprises fitting an ellipse onto the measurement data.
1 more element
A method of calibrating an accelerometer, comprising:
- rotating a seismic cable that carries the accelerometer, wherein rotating the seismic cable comprises rotating the seismic cable 360° multiple times;
- receiving measurement data measured by the accelerometer as the seismic cable is rotated, wherein receiving the measurement data measured by the accelerometer comprises receiving plural sets of measurement data corresponding to the multiple 360° rotations;
- averaging the multiple sets of measurement data to provide an average measured data;
- and
- computing at least one calibration parameter according to the average measured data, wherein the at least one calibration parameter is for use in calibrating the accelerometer.
2 more elements
A method of calibrating an accelerometer, comprising:
- rotating a seismic cable that carries the accelerometer;
- receiving measurement data measured by the accelerometer as the seismic cable is rotated;
- and
- computing at least one calibration parameter according to the received measurement data, the at least one calibration parameter for use in calibratin the accelerometer, wherein computing the at least one calibration parameter comprises computing a sensitivity of the accelerometer.
1 more element
Dependencies are inferred from the claim text.