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Related Experiment Video

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The Measurement of Unsteady Surface Pressure Using a Remote Microphone Probe

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Supersensitive Detector of Hydrosphere Pressure Variations.

Grigory Dolgikh¹, Sergey Budrin¹, Stanislav Dolgikh¹

¹V.I. Il'ichev Pacific Oceanological Institute FEB RAS, 690041 Vladivostok, Russia.

Sensors (Basel, Switzerland)

|December 10, 2020

Summary

This study introduces a novel instrument for measuring hydrosphere pressure variations. The device achieves high accuracy, offering valuable data for oceanographic and geophysical research.

Keywords:

Michelson interferometer frequency-stabilized helium-neon laser infra-gravity waves laser strainmeter low-frequency hydroacoustic emitter supersensitive detector wind wave

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Area of Science:

Geophysics
Oceanography
Instrumentation

Background:

Accurate measurement of hydrosphere pressure variations is crucial for understanding oceanic processes and seismic activity.
Existing instruments may have limitations in sensitivity, accuracy, or operating range for certain applications.

Purpose of the Study:

To present a new instrument for recording hydrosphere pressure variations.
To detail the instrument's design, performance, and potential for enhanced capabilities.

Main Methods:

Utilizes an equal-arm Michelson interferometer.
Employs a frequency-stabilized helium-neon laser for precise measurements.
Incorporates a supersensitive detector for infrasonic and sonic frequency ranges.

Main Results:

The instrument records hydrosphere pressure variations from 0 to 1000 Hz.
Achieves an accuracy of 0.24 mPa at sea depths up to 50 m.
Experimental results confirm high performance in infrasonic and sonic ranges.

Conclusions:

The developed instrument demonstrates high performance for detecting subtle pressure changes in the hydrosphere.
Potential exists for expanding the operating range and enhancing accuracy through system improvements.
This technology offers a valuable tool for scientific research in oceanography and geophysics.