SEISMOMETER Russian patent published in 2004 - IPC

FIELD: measuring equipment engineering.

SUBSTANCE: seismometer has base, on which two magnetic systems are mounted, which are a body. These include serially connected magnetic circuit, constant magnet and polar end piece. Frame with five coils forms an inert mass suspended in space of magnetic system by two flat springs with possible displacement along the space. Second and third coils are placed on two sides of frame in such a way, that one their half is in space of magnetic systems, and other half is outside it. Fourth coil is placed on frame between second and third coils. Above fifth coil a first coil is placed. Inside of magnetic systems, coaxially to them, a nut and non-magnetic bushing are placed for connection of magnetic systems. Sinusoidal electric oscillations generator is connected by its two inputs to beginning of second coil and end of third coil, first amplifier, phase-sensitive rectifier, integrator and second amplifier, these are serially connected, output of second amplifier is connected by output to end of fifth coil. Third amplifier is connected by input to input of integrator and output of phase-sensitive rectifier, and by output - to second input of second amplifier, third input of which is connected to beginning of fourth coil. Forming filter is connected by two inputs respectively two beginning and to end of first coil. End of second coil and beginning of third coil are interconnected and connected to input of first amplifier. Second and third inputs of phase-sensitive rectifier are connected respectively to two outputs of sinusoidal electrical oscillations generator. End of fourth coil and beginning of fifth coil are connected to seismometer body.

EFFECT: higher precision, small dimensions of device.

1 dwg