GEOPHONE Russian patent published in 1999 - IPC

FIELD: seismic prospecting. SUBSTANCE: geophone has case, inertial mass put on restoring suspension in case, first light guides, generator of optical radiation, photodetector and recorder. Salient feature of invention consists in insertion of phase fiber-optical measurement system, electrodynamic damping, system eliminating ambiguity of readings made of resistor, mirrors anchored on end faces of inertial mass, light guides 10 with open receiving extremities 15 with translucent coats covered by mirror coats, optical connectors/disconnectors of second light guides, analog-to-digital converter, microprocessor, optical radiation generator generating two harmonic waves, photodetector. Photodetector has optical multiplexer, optical detectors, analog-to-digital converters and unit determining phase. EFFECT: expanded functional capabilities and increased measurement accuracy. 2 cl, 2 dwg