SEISMOMETER Russian patent published in 2004 - IPC

FIELD: measuring engineering.

SUBSTANCE: seismometer has base provided with the cylindrical dielectric housing. The housing receives two magnetic systems made of cylindrical magnetic conductor, permanent magnet, and pole tip connected in series. The magnetic systems are interconnected and insulated from each other with a dielectric spacer. The space between two magnetic systems receives a coil. The magnetic systems are rigidly interconnected via the dielectric cantilever which is secured to the base through two flexible pivots. The inner side of the cylindrical housing is provided with the cylindrical output electrode. The inner faces of the housing are provided with two additional output electrodes. The seismometer has two amplifiers, generator of sinusoidal oscillation whose two outputs are connected with the magnetic systems and two inputs of the first amplifier whose output is connected with the coil. The second (inverting) amplifier is connected in series with the adder whose second input is connected with the cylindrical output electrode and output is connected with the third input of the first amplifier. The additional output electrodes are connected with the input of the inverting amplifier.

EFFECT: enhanced signal-to-noise ratio.

1 dwg