Distributed optical fiber vibration sensor vibration source transverse positioning method and system

A vibration sensor, distributed optical fiber technology, used in instruments, measuring devices, measuring ultrasonic/sonic/infrasonic waves, etc., to reduce false alarms

Active Publication Date: 2020-06-09
WUHAN WUTOS
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Problems solved by technology

[0007] Aiming at the deficiencies or improvement needs of the existing distributed optical fiber vibration sensor vibration source lateral posit

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  • Distributed optical fiber vibration sensor vibration source transverse positioning method and system
  • Distributed optical fiber vibration sensor vibration source transverse positioning method and system
  • Distributed optical fiber vibration sensor vibration source transverse positioning method and system

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Embodiment Construction

[0035] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.

[0036] Such as figure 1 As shown, the method for lateral positioning of the vibration source of the distributed optical fiber vibration sensor in the embodiment of the present invention includes the following steps:

[0037] S1: Obtain spatiotemporal vibration data of the optical fiber spatial distribution caused by a single-point vibration source;

[0038] S2: Calculate the position of the axial vibration center of the optical fiber closest to the vibration source on the sensing optical fiber according to the space-time vibration data;

[0039] S3: Obtain the vibration data wave width Δt of the axi...

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Abstract

The invention discloses a transverse positioning method for a vibration source of a distributed optical fiber vibration sensor. The transverse positioning method comprises steps of S1, acquiring space-time vibration data of optical fiber spatial distribution caused by a single-point vibration source; S2, calculating the position of an optical fiber axial vibration center, closest to a vibration source, on the sensing optical fiber according to the space-time vibration data; S3, respectively acquiring vibration data wave widths delta t1 and delta t2 of the optical fiber axial vibration center and a monitoring point spaced from the optical fiber axial vibration center by a distance d through the vibration space-time data; and S4, obtaining a transverse distance between the vibration source and the axial vibration center of the optical fiber according to the seismic wave dispersion principle. The method is advantaged in that the transverse position information of the vibration source canbe obtained through a very small amount of calculation, and misinformation in practical application is greatly reduced.

Description

Technical field [0001] The invention relates to the technical field of distributed optical fiber Rayleigh scattering vibration sensing systems, in particular to a method and system for lateral positioning of a distributed optical fiber vibration sensor vibration source. Background technique [0002] Distributed optical fiber vibration sensor is an optical fiber sensing system developed in recent decades for real-time measurement of spatial vibration information distribution. After decades of development, the technology is relatively mature. The distributed optical fiber vibration sensing system uses Rayleigh scattering signals, and the disturbance position can be calculated by the following formula according to the OTDR principle: [0003] [0004] Among them, Δt is the time from sending a pulse to receiving the light signal at that point; c is the speed of light; n is the refractive index of the fiber core. [0005] In recent years, the system has received extensive attention in p...

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Application Information

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IPC IPC(8): G01H9/00
CPCG01H9/004
Inventor 田铭董雷王颖刘洪凯明昌朋
Owner WUHAN WUTOS
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