SEISMIC SENSOR Russian patent published in 2020 - IPC G01V1/16 G01V1/18 

FIELD: measurement.

SUBSTANCE: invention relates to measurement equipment, in particular to graviynertic measurements, namely to seismometry. Disclosed is seismometer, comprising base, two resilient elements, brackets, dielectric spacers, permanent magnets and pole tips, multisectional coil, generator of sinusoidal oscillations, differential amplifier-demodulator, connected together even excitation electrodes of capacitance sensor and connected to odd excitation electrodes of capacitance sensor, as well as connected even output electrodes of capacitance sensor and connected odd output electrodes of capacitance sensor, transformer. At that, seismometer additionally contains n + 1 pole tips with working surfaces parallel to each other, fixed on the base and connected to 4n permanent magnets, arranged between pole tips by 4 magnets along perimeter of n + 1 pole tips, n sections of multisection coil arranged in gaps between working surfaces of n + 1 pole tips and connected to base by means of brackets and two resilient elements. Each pole tip is made of two parts separated by an insulating spacer from antimagnetic material. Each section of multisectional coil is made in the form of multilayer printed-circuit board (MPCB) with even and odd excitation electrodes of capacitance sensor on outer layers of MPCB and printed inductance coils on inner layers of MPCB. At that, parallel to working surfaces of pole tips with the help of adjusting screws there installed are frames from nonmagnetic material with dielectric spacers and even and odd output electrodes of capacitance sensor on surfaces of dielectric spacers, opposite to surfaces of sections of multisection coil.

EFFECT: technical result is high sensitivity of seismometer when measuring seismic actions.

1 cl, 3 dwg