APPARATUS AND METHOD FOR ELIMINATING ELECTRICAL NOISE IN THE FIRE DETECT TIMING SIGNAL OF AN AIR GUN
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United States of America Patent
Stats
-
Oct 29, 2002
Grant Date -
Nov 21, 2002
app pub date -
May 2, 2001
filing date -
May 2, 2001
priority date (Note) -
Granted
status (Latency Note)
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Abstract
The invention describes an air gun for use in a marine seismic system. The air gun includes a gun body and shuttle that define a chamber containing a compressed supply of gas. The air gun is further designed to release the compressed gas so that the release time or gun fire time is monitored with sufficient accuracy. The fire time is measured by a timing coil that determines the location of the air gun shuttle by sensing a magnet disposed on the shuttle. The timing coil is designed to eliminate interference caused by magnetic flux generated by the actuation of an air gun solenoid valve.
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