DEVICE FOR MEASURING INFRASONIC VIBRATIONS OF MEDIUM Russian patent published in 2020 - IPC G01H11/00 

FIELD: measurement.

SUBSTANCE: invention relates to measurement equipment, in particular to measurement of infrasound oscillations of gaseous or liquid medium. Device for measuring infrasonic vibrations of a medium comprises a sealed housing, two membranes, a first capacitive sensor for movement of the membrane and a first amplifier-demodulator, as well as the first analogue output of the device and a generator connected to the first capacitive sensor and the first amplifier-demodulator. Proposed device comprises bellows, DC filter, first comparator with inverse input, first AND circuit, first timer, second comparator, second AND circuit and second timer. As well as third and fourth keys, micromotor with drive, mechanically connected to bellows, third comparator with inverse input, OR circuit and control input of fifth key, as well as a fourth comparator connected to the second input of the OR circuit, a second capacitive sensor for movement of the membrane, a second amplifier-demodulator, a first amplifier and an analogue adder, as well as a second amplifier, a first feedback unit and a first magnetoelectric transducer, a second feedback unit and a second magnetoelectric transducer. First magnetoelectric transducer is connected to the first capacitive sensor and to the first membrane, and the second magnetoelectric transducer is connected to the second capacitive sensor and to the second membrane.

EFFECT: technical result is high accuracy of measuring infrasound vibrations of medium.

1 cl, 2 dwg