DEVICE FOR MONITORING THE VIBROACOUSTIC CHARACTERISTICS OF WELLS Russian patent published in 2023 - IPC G01V8/24 G01H9/00 

FIELD: instrumentation.

SUBSTANCE: device for monitoring the vibroacoustic characteristics of wells comprises a functionally connected receiving-transmitting optical module, an amplifying optical module, a fiber-optic sensitive element and a computer, whereas the receiving-transmitting optical module contains a narrow-band continuous laser, an acoustic-optical modulator, a photodetector, a signal processing unit, a frequency filter and a post-processing, control and synchronization unit, the amplifying optical module comprises transmitting and receiving optical amplifiers, an optical circulator and an optical filter, in addition, the fiber-optic sensing element is made in the form of a pair of optical fibers, the first fiber of which is pretensioned, and the second fiber is free, the frequency filter consists of two filters, of which one filter passes a signal in the frequency range of 25-1000 Hz and is switched on simultaneously with one fiber, and the other filter passes a signal in the frequency range of 0-25 Hz and is switched on simultaneously with another fiber.

EFFECT: improved measurement accuracy.

1 cl, 2 dwg