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Optical fiber micro-vibration detection measurement system

A measurement system and micro-vibration technology, applied in measurement devices, geophysical measurement, measurement of ultrasonic/sonic/infrasonic waves, etc., can solve problems such as electromagnetic interference, accuracy, and reliability that cannot meet requirements, and achieve easy deployment and electromagnetic interference. , the effect of increasing the sensitivity

Active Publication Date: 2022-06-03
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0010] In view of this, it is necessary to provide a fiber optic micro-vibration detection and measurement system to solve the technical problems that the existing micro-vibration detection methods are susceptible to electromagnetic interference and cannot meet the requirements in terms of accuracy and reliability.

Method used

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  • Optical fiber micro-vibration detection measurement system
  • Optical fiber micro-vibration detection measurement system
  • Optical fiber micro-vibration detection measurement system

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Embodiment Construction

[0023] The preferred embodiments of the present invention are specifically described below with reference to the accompanying drawings, wherein the accompanying drawings constitute a part of the present application, and together with the embodiments of the present invention, are used to explain the principles of the present invention, but are not used to limit the scope of the present invention.

[0024] Please refer to figure 1 , the present invention provides an optical fiber micro-vibration detection measurement system, including at least one vibration conduction mechanism 1 , a sensing fiber 2 and a detection mechanism 3 .

[0025] The vibration transmission mechanism 1 includes a base 11, a support column 12, a first pulley 13, a second pulley 14 and a mass block 15. The base 11 is placed on the ground of the detection environment and forms a force coupling with the ground. The lower end of the column 12 is fixed to the base 11 , the support column 12 can also be integral...

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Abstract

The invention discloses an optical fiber micro-vibration detection and measurement system, which comprises at least one vibration conduction mechanism, a sensing optical fiber and a detection mechanism, the vibration conduction mechanism comprises a base, a supporting column, a first pulley, a second pulley and a mass block. The sensing optical fiber is wound on the first pulley and the second pulley, and one end of the sensing optical fiber is connected with the detection mechanism; the detection mechanism is used for emitting narrow linewidth laser pulses into the sensing optical fiber, receiving backscattered light in the sensing optical fiber and demodulating the phase change of the backscattered light. The distributed optical fiber sensing system based on phase demodulation has the beneficial effects that the sensing optical fiber is used as a sensor to detect a micro-vibration signal, and the vibration information of each point along the road of the sensing optical fiber is detected by detecting the phase change of backscattered light in the sensing optical fiber; the distributed optical fiber sensing system based on phase demodulation has the unique advantages of being simple in structure, easy to arrange, high in cost performance, capable of achieving large-range and high-precision measurement and the like.

Description

technical field [0001] The invention relates to the technical field of micro-vibration detection, in particular to an optical fiber micro-vibration detection measurement system. Background technique [0002] As a very important micro-vibration wave, seismic wave has always been a major focus of micro-vibration research. The study of seismology originated from the need of human beings to resist earthquake disasters. Early seismology mainly studied and recorded the macroscopic phenomenon of earthquakes and the geographical distribution of earthquakes from the perspective of geology. At the beginning of the 20th century, due to the recording and analysis of seismic waves, seismology developed from a macroscopic description to a mathematical science, expanding the research field, and some branch disciplines appeared, with various applications. [0003] Seismic wave detection is a key method to obtain surface hydrological information, understand the process and mechanism of maj...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/18G01H9/00
CPCG01V1/181G01H9/004
Inventor 闫志君石正宣肖翔鹏李豪孙琪真
Owner HUAZHONG UNIV OF SCI & TECH
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