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

CN112903084AActive Publication Date: 2021-06-04CHINA NAT CHEM COMM CONSTR GRP CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-06-04

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Abstract

One or more embodiments of the invention provide an optical fiber vibration sensing optical path fault diagnosis method and related equipment, wherein the method comprises the steps: obtaining a voltage signal sequence of an optical fiber vibration sensing optical path in a normal state, and obtaining a voltage signal sequence of the sensing optical path in a dark state and a single-arm disconnection state; and setting a threshold value based on the voltage signal sequences in different states, and judging whether the sensing optical path fault is a no-light fault state or a single-arm fault state based on the threshold value. According to the fault diagnosis method provided by the invention, when the sensing optical path runs on line, the optical path does not need to be disconnected or other additional optical path detection equipment is not needed, and whether the sensing optical path is abnormal or not can be effectively judged only by continuously acquiring the intensity signal sequence of the optical path; the fault diagnosis method provided by the invention has the characteristics of simplicity, rapidness and accuracy.
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Description

technical field

[0001] One or more embodiments of this specification relate to the technical field of optical fiber sensors, in particular to a method for diagnosing faults in an optical path 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 to the modulator through the optical fiber, and 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, Polarization state, etc.) changes to become the modulated signal light, which is sent to the photodetector through the optical fiber, and the measured parameters are obtained after demodulation.

[0003] The interferometric optical fiber sensor has the advantages of high sensitivity and dynamic range, and uses optical fiber as the sensing and transmission unit, which is not eas...

Examples

Embodiment Construction

[0036] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0037] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in one or more embodiments of the present specification shall have ordinary meanings understood by those skilled in the art to which the present disclosure belongs. "First", "second" and similar words used in one or more embodiments of the present specification do not indicate any order, quantity or importance, but are only used to distinguish different components. "Comprising" or "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items. Words such as "connected" or "con...