Optical fiber vibration sensing optical path fault diagnosis method and related equipment
A technology for sensing optical paths and optical fiber vibrations, applied in instruments, measuring devices, and using wave/particle radiation, etc., can solve problems such as inability to monitor optical fiber links online, and achieve the effect of simple diagnostic methods
Active Publication Date: 2022-07-19
CHINA NAT CHEM COMM CONSTR GRP CO LTD +2
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[0005] In view of this, the purpose of one or more embodiments of this specification is to propose a fiber optic vibration sensing optical path fault diagnosis method and related equipment to solve the problem that the fiber link cannot be monitored online
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[0036] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the present disclosure will be further described in detail below with reference to the specific embodiments and the accompanying drawings.
[0037] It should be noted that, unless otherwise defined, the technical or scientific terms used in one or more embodiments of the present specification shall have the usual meanings understood by those with ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and similar terms used in one or more embodiments of this specification do not denote any order, quantity, or importance, but are merely used to distinguish the various components. "Comprises" or "comprising" and similar words mean that the elements or things appearing before the word encompass the elements or things recited after the word and their equivalents, but do not exclude other elements or things. Words like "connected" or "con...
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One or more embodiments of the present specification provide a fault diagnosis method and related equipment for an optical fiber vibration sensing optical path, including acquiring a voltage signal sequence of the optical fiber vibration sensing optical path in a normal state, acquiring a no-light state and a single-arm disconnected state Based on the voltage signal sequence of the sensing optical circuit in different states, a threshold is set based on the voltage signal sequence in different states, and based on the threshold, it is determined whether the sensing optical circuit fault is a no-light fault state or a single-arm fault state. The fault diagnosis method of the present invention can effectively judge whether there is an optical path abnormality in the sensing optical path only by continuously acquiring the intensity signal sequence of the optical path itself without disconnecting the optical path or using other additional optical path detection equipment while the sensing optical path is running online. The fault diagnosis method of the present invention has the characteristics of simplicity, rapidity and accuracy.
Description
technical field [0001] One or more embodiments of this specification relate to the technical field of optical fiber sensors, and in particular, to a method for diagnosing optical path faults of optical fiber vibration sensing and related equipment. Background technique [0002] The basic working principle of the optical fiber sensor is to send the light from the light source into the modulator through the optical fiber, so that after the parameter to be measured interacts with the light entering the modulation area, the optical properties of the light (such as light intensity, wavelength, frequency, phase, The polarization state, etc.) changes to become the modulated signal light, which is sent to the photodetector through the optical fiber, and after demodulation, the measured parameters are obtained. [0003] The interferometric fiber optic sensor has the advantages of high sensitivity and dynamic range, and uses optical fiber as the sensing and transmission unit, which is...
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IPC IPC(8): G01H9/00
CPCG01H9/004
Inventor 张华勇王向刚刘涛佐成
Owner CHINA NAT CHEM COMM CONSTR GRP CO LTD