SEISMOMETER Russian patent published in 2000 - IPC

FIELD: measurement technology; seismometry. SUBSTANCE: seismometer has two magnetic systems of series-connected cylindrical magnetic cores, permanent magnet, and pole shoe. Magnetic systems are isolated from one another by means of insulating gasket and form inertial mass. Magnetically soft conical rods are used for hanging out inertial mass in gravity field of the Earth. Magnetic systems are interconnected differentially, mounted on baseplate by means of insulating bracket and two flexible members, and placed inside cylindrical case whose inner surface carries output electrodes of capacitive displacement transducer connected to inputs of amplifier whose other inputs are connected to sine-wave oscillator outputs which are electrically connected to two magnetic systems; the latter function as two exciting electrodes of capacitive displacement transducer; amplifier outputs are connected to sections of multiple coil wound on former and placed in dielectric shroud. EFFECT: improved metrological characteristics and reduced size of seismometer. 1 dwg