Method for detecting sealing state of watertight door based on fiber bragg grating

A fiber grating and detection method technology, applied in the field of ships, can solve the problems of misjudgment or omission of detection, poor corrosion resistance and chemical stability, and poor anti-interference ability.

Active Publication Date: 2021-07-06
WUHAN UNIV OF TECH
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Problems solved by technology

[0005] In order to solve the problem that the current watertight door seal detection system has poor anti-interference ability, poor corrosion resistance and chemical stability, it cannot achieve the direct and real-time monitoring purpose of watertight doors; operational security issues

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  • Method for detecting sealing state of watertight door based on fiber bragg grating
  • Method for detecting sealing state of watertight door based on fiber bragg grating
  • Method for detecting sealing state of watertight door based on fiber bragg grating

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Embodiment Construction

[0021] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings. The content shown in each figure is only for understanding the technical content of the invention, and does not represent the actual scale and real shape of the product, wherein the same reference numerals indicate parts with the same structure or the same function but similar structure.

[0022] In this article, "parallel", "perpendicular", etc. are not strictly limited in the sense of mathematics and / or geometry, and they may also include errors understandable by those skilled in the art and allowed when manufacturing or using the product. In addition, "perpendicular" not only includes two objects being perpendicular to each other directly in space, but also perpendicular to each other when two objects are not touching in space. ...

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Abstract

The invention discloses a method for detecting the sealing state of a watertight door based on fiber bragg gratings, and the method comprises the steps: a plurality of fiber bragg grating strain gauges are arranged on the watertight door, and the plurality of fiber bragg grating strain gauges for detection are fixedly disposed on the bottom surface of a sealing groove of the watertight door, the temperature compensation fiber bragg grating strain gauge is fixedly installed on a door plate of the watertight door to eliminate temperature influence, the wavelength difference value of the fiber bragg grating when the watertight door is closed and opened is monitored in real time, a strain difference value curve of the watertight door is obtained, and through a threshold value judgment method and establishment of a fiber bragg grating strain difference value curve database, the sealing state of the watertight door can be accurately judged. The detection precision and stability are greatly improved by adopting a detection method based on an optical fiber sensing technology, the accuracy of detection of the sealing state of the watertight door is improved by adopting a multi-point-position mounting method of a plurality of fiber grating strain gauges, and when the watertight door is in an abnormal sealing state, the abnormal sealing reason can be judged, the abnormal sealing position can be accurately positioned, and the reliability of the detection method is improved.

Description

technical field [0001] The invention belongs to the technical field of detecting the sealing state of a watertight door in the ship field, and in particular relates to a method for detecting the sealing state of a watertight door based on an optical fiber grating. Background technique [0002] The watertight door is an important structure to ensure the safe driving of the ship. The watertight door of the ship is very important to ensure the watertightness of the cabin, and then to ensure the safety of the engine room and even the ship. Therefore, the sealing detection of ship watertight doors is particularly important. [0003] The sealing detection system is an important ship signal equipment. It uses sensors to detect the sealing information of the watertight door, and can obtain the sealing state of the watertight door after it is closed. Most of the existing watertight door seal detection systems use ultrasonic testing methods. The basic principle is to place the ultras...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/36
CPCG01M3/363
Inventor 潘建军侯伟祁耀斌郭会勇张俊杰
Owner WUHAN UNIV OF TECH
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