2006_3_ppt - Transfer functions of geophones and Transfer...

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Unformatted text preview: Transfer functions of geophones and Transfer functions of geophones and accelerometers and their effects on accelerometers and their effects on frequency content and wavelets frequency content and wavelets Michael S. Hons and Robert R. Stewart Outline Outline • Intro to transfer functions • Deriving transfer functions • Implications in the derivation • Examples • Conclusions Transfer Functions Transfer Functions • A is input • B is output • H is transfer function H A B = Deriving transfer functions Deriving transfer functions • u is ground displacement • x is proof mass displacement relative to the case • n is the net motion, used earlier in the derivation x u n Deriving Transfer Functions Deriving Transfer Functions • Must represent output divided by input • Seismic sensors are “single degree of freedom” systems, or damped simple harmonic oscillators 2 2 2 2 2 2 t u x t x t x ∂ ∂ − = + ∂ ∂ + ∂ ∂ ω λω Deriving Transfer Functions Deriving Transfer Functions • The transducer – Detects the displacement of the proof mass relative to...
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This note was uploaded on 05/09/2010 for the course EARTH SCIE APPLIED GE taught by Professor Es during the Spring '09 term at IIT Bombay.

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2006_3_ppt - Transfer functions of geophones and Transfer...

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