PIEZOMAGNETIC GEOPHONE Russian patent published in 2002 - IPC

FIELD: measurement technology, primary transducers-energy converters, seismic prospecting, underwater acoustics, alarm systems detecting traveling targets. SUBSTANCE: piezomagnetic geophone has case housing three induction coils, three permanent magnets with formation of intermagnet distances X₁ and X₂ and two piezoceramic elements with straps. Permanent magnets and piezoceramic elements with straps are so positioned on one axis that center magnet is placed in magnetic suspension with flexibility C which allows it travel along axis within intermagnet distances X₁ and X₂. EFFECT: increased specific sensitivity and noise immunity. 1 dwg