Coupling evaluation geophone and method for eliminating ground-geophone coupling effect
OwnerJidong Weiinventor
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Abstract
The present disclosure discloses a coupling evaluation geophone, comprising piezoelectric ceramic crystal 1, 2 and 3, a geophone 4 and a relevant supplying circuit. Three piezoelectric ceramic crystals 1, 2 and 3 are respectively provided on the top and two lateral sides of the geophone 4. By processing measurement data derived from the coupling evaluation geophone, a ground-geophone coupling effect is obtained at a corresponding embedment point of the coupling evaluation geophone. An effect of the ground-geophone coupling on an earthquake data can be eliminated by calculation. Data detected by the coupling evaluation geophone is improved in fidelity, Signal/Noise ratio and resolution.
Claims12
A coupling evaluation geophone, comprising:
- a first piezoelectric ceramic crystal, a second piezoelectric ceramic crystal, a third piezoelectric ceramic crystal and a geophone;
- wherein the first piezoelectric ceramic crystal is provided at the top of the geophone;
- the second piezoelectric ceramic crystal is provided at a first lateral side of the geophone;
- and the third piezoelectric ceramic crystal is provided at a second lateral side of the geophone perpendicular to the first lateral side of the geophone;
- wherein a square-wave generator provides power to the first piezoelectric ceramic crystal, the second piezoelectric ceramic crystal and the third piezoelectric ceramic crystal;
- and a coupling effect is obtained from a processed output signal from the coupling evaluation geophone,
- wherein a 40V, 0.5-2 Hz square wave is output from the square-wave generator to the first piezoelectric ceramic crystal, the second piezoelectric ceramic crystal and the third piezoelectric ceramic crystal;
- and
- corresponding parameters for the coupling system are obtained by eliminating low frequency and multiple stacking within a range of 300-600 Hz with a sample interval of 0.5 ms and a record length of 10 s.
Dependencies are inferred from the claim text.