Three-component borehole seismometer

摘要

The utility model relates to measuring technique, in particular to seismometry, and can be used for seismic monitoring. A three-component borehole seismometer is claimed, comprising a locking block, a generator, first and second channels for receiving horizontal signal components and a third channel for receiving vertical signal components in a sealed housing with spring-loaded stabilizers. Moreover, each channel includes a pendulum, a first amplifier, a calibrator, a capacitive displacement sensor, a second amplifier, a first demodulator, a feedback unit, and a magnetoelectric transducer connected in series. In each channel, the pendulum is mechanically connected with a capacitive displacement sensor, with a magnetoelectric transducer and a locking unit, the calibrator is connected by an output to the input of the magnetoelectric transducer, the first amplifier is connected to the output of the first demodulator, and the capacitive displacement sensor and the first demodulator are connected to the generator. The seismic meter further comprises a microprocessor, a first analog-to-digital converter (ADC), a second ADC, a third ADC, an azimuthal displacement sensor, a first DAC and a first filter connected in series, a second DAC and a second filter connected in series, a first adder, a third digital-to-analog converter (DAC), second adder, modem, first, second, third and fourth signal conversion channels. Moreover, each signal conversion channel includes a third amplifier, a multiplier and a first phase shifter connected in series, a functional converter, a second phase shifter and a fourth amplifier connected in a certain way and connected to adders, ADCs and DACs. Moreover, the functional converters of the first and third signal conversion channels implement the cosx function, and the functional converters of the second and fourth signal conversion channels implement the sinx function. The technical result is the ability to change the azimuthal orientation of the radiation patterns of a three-component borehole seismometer after installation in the well. 3 ill.