WHAT IS GEOPHONE?
The seismic wave field is measured by
geophones or hydrophones. The output is electrical signals. The data from the
geophones are initially amplified at the preamplifier which is the voltage. It
is then passed through an analog low-cut filter. The data are filtered by the
analog high-cut filter so that frequencies above Nyquist are removed and then
amplified again. Geophones are remarkably simple devices, unlike what you might
think.
The active element of the device
consists of a mass hanging on a spring, like gravity meters. The mass wants to
remain motionless when the ground moves. Geophone has been used by
geophysicists and seismologists to convert ground movement into voltage. It is
a ground motion transducer. The Seismic response is any deviation in this
measured voltage from the baseline. It is used for analyzing the earth’s
structure.
The key factor in a geophone is
Resonance frequency. Resonance frequency has to be low for the measurement of
low-frequency signals. To measure high-frequency signals, Geophone must exhibit
high bandwidth. Currently available geophones include mechanical springs, which
decrease the performance of the device. Feeding back the output of geophone
will vary the geophone’s sensitivity with respect to its frequency. By
controlling the position of proof mass, the resolution of geophone can be
enhanced.
To achieve a high level of accuracy
and precision, geophones are used for several industrial applications for
vibration isolation purposes and absolute velocity sensing. Geophone technology
is employed to measure absolute velocity for lithographic and high-level
inspection applications to determine payload disturbances caused by moving
parts and other external disturbances. Major applications of geophones are the
detection of leakage in gas and oil fields and earthquake prediction.
The geophones currently available in
the market are highly sophisticated, and they operate based on the magnetic
field generated by a coil suspended in a magnetic field. The current seismic
industry market requires tight specifications to meet the standards of the
seismic survey. Cable and Supplies, Inc. is one of the best suppliers of
high-performance geophones, cables, seismic connectors, industrial sensors,
earthquake seismometer, detectors, vibration detectors, border security
products. Cable & Supplies, Inc. has supplied geophysical, vibration and
security products worldwide. Cable & Supplies is able to guarantee a very
high level of satisfaction for our clients, with a long list of products and
never-ending customer support. We offer the highest standard of services with
the latest technology, equipment.
Comments
Post a Comment