DEVICE FOR EXCITATION OF CONTINUOUS VIBRATIONS OF A STRING BY A HALF-SINE PULSE Russian patent published in 2022 - IPC G01L1/10 

FIELD: measuring technology.

SUBSTANCE: invention relates to the field of measuring technology and can be used to excite continuous oscillations of a string transducer with one electromagnetic excitation coil in the mode of free oscillations, under conditions of a variable level of electrical noise. The device for excitation of continuous oscillations consists of a trigger pulse generator, a string converter with a single electromagnetic coil, the first and second analog signal multipliers, a frequency detector, a sampling and storage unit, a voltage-controlled standby single vibrator, a commutator, a half-wave sinusoid pulse generator with a voltage-controlled amplitude, an amplifier , a limiting amplifier, first and second standby multivibrators, a coincidence circuit, first and second amplitude detectors, a low pass filter, a high pass filter, first and second emitter followers, and a voltage-controlled level comparator.

EFFECT: ensuring automatic maintenance of the level of operation of the comparator at an optimal level when the level of electrical interference changes, increasing the accuracy of measuring the informative parameter of a string transducer with a single electromagnetic coil, the frequency of string vibrations and increasing the stability of string vibrations.

1 cl, 2 dwg