Optical fiber deep well earthquake sound instrument

Abstract

The invention discloses an optical fiber deep well earthquake sound instrument. The optical fiber deep well earthquake sound instrument comprises a cylindrical shell which is used for protecting the internal structure of the optical fiber deep well earthquake sound instrument and transmitting earthquake sound signals, a support which is arranged inside the cylindrical shell and used for mounting sensing units of the optical fiber deep well earthquake sound instrument and transmitting the earthquake sound signals, at least one optical fiber earthquake sound sensor which are arranged on the support and used for measuring earthquake sound signals, an optical fiber temperature sensor which is arranged inside the cylindrical shell and is used for carrying out temperature compensation on the optical fiber deep well earthquake sound instrument and a pouring body which is arranged inside the cylindrical shell and is used for transmitting the earthquake sound signals, wherein a tail fiber of the optical fiber earthquake sound sensor is led out by virtue of an optical cable. By adopting the optical fiber deep well earthquake sound instrument disclosed by the invention, capability of detecting the earthquake sound and high frequency ultra-micro earthquake is improved, and the problems of a deep well earthquake sound instrument such as complex structure, electromagnetic interference, lightning protection, long distance and real-time signal transmission and long-term continuous observation can be solved.

Description

technical field [0001] The invention relates to the technical field of seismic monitoring instruments, in particular to an optical fiber deep well geoacoustic instrument. Background technique [0002] Geoacoustics are high-frequency rock microfracture acoustic emission signals that occur some time before an earthquake, and are important information for short-term earthquake prediction. my country's geoacoustic observation began in the 1970s, but it has not been favored by seismologists because of the high frequency, weak intensity and strong interference background of geoacoustic signals. It is very difficult to maintain long-term continuous recording, and the detection equipment is expensive. Although the "Deep Well Geoacoustic Observation" in the 1980s proved that high-frequency seismic waves can propagate over long distances, and opened up the high-frequency seismic frequency window (Chi Shunliang, "Deep Well Broadband Borehole Strain Seismograph and High-Frequency Seismo...

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Problems solved by technology

[0009] In view of this, the main purpose of the present invention is to provide an optical fiber deep well geoacoustic instrument to improve the ability to detect geoacoustics and high-frequency extremely microseismic, and to solve the system complexity, electromagnetic interference, lightning protection, and long-term problems of the deep well geoacoustic instrument. Issues such as real-time transmission of distance signals and long-term continuous observation

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