Communications – electrical: acoustic wave systems and devices – Seismic prospecting – Well logging
Patent
1985-08-22
1987-04-14
Moskowitz, Nelson
Communications, electrical: acoustic wave systems and devices
Seismic prospecting
Well logging
367 30, 367 31, 367 75, G01V 140, H03G 320
Patent
active
046583831
ABSTRACT:
For use in a downhole acoustic logging system including an acoustic transmitter and spaced acoustic receiver, the preferred and illustrated embodiment incorporates a gain control for the receiver system. The automatic gain control (AGC) controls data capture without clipping or fadeout, and provides the digitized value of gain setting to be recorded to assist in data reduction whereby the digitized signal and gain of the system are obtained. The inbound signal is divided into a pressure wave, a shear wave and a fluid wave. The gain function is divided into three gain control regions indentified hereinafeter as the P, S and F regions, and the gain is stepped automatically to provide an output voltage within specified limits. Those limits are observed, thereby operating the gain controlled in the AGC in digital fashion, and the received signal is amplified in a controlled manner, thereby enabling recordal of the wave form without clipping or fadeout while capturing the gain to enable recovery of the data.
REFERENCES:
patent: 4527148 (1985-07-01), Kuboki et al.
Beard W. J.
Halliburton Company
Moskowitz Nelson
LandOfFree
Automatic gain control of digitized full trace acoustic signal i does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automatic gain control of digitized full trace acoustic signal i, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic gain control of digitized full trace acoustic signal i will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1790375