Multi-parameter optical fiber sensing ship structure real-time health monitoring system and method

Abstract

The invention discloses a multi-parameter optical fiber sensing ship structure real-time health monitoring system, which comprises a 12-core band-shaped optical fiber grating strain sensor, an opticalfiber grating acceleration sensor of a flexible hinge, an optical fiber grating temperature sensor serving as temperature compensation, an optical fiber grating demodulator, a data processing moduleand a health detection and evaluation system. According to the novel flexible hinge fiber grating acceleration sensor used in the invention, by optimizing the structure of an arc-shaped flexible hinge, the elliptical hinge structure is introduced into a high-range FBG acceleration sensor to construct the design theory and the process technology of the FBG acceleration sensor based on the elliptical hinge, so that excellent sensor performance is obtained; and according to the data measured by the optical fiber grating sensor on a ship, whether the structural damage state reaches the service life is judged, so that safety accidents are prevented.

Description

technical field [0001] The invention belongs to the technical field of real-time health monitoring systems for ship structures, and in particular relates to a real-time health monitoring system and method for multi-parameter optical fiber sensing ship structures. Background technique [0002] Large ships will be subjected to strong wind and water pressure loads and strong solar radiation during navigation. In this severe working environment, the hull will undergo various serious deformations and damages. Failure to monitor and maintain in time may result in major personal accidents and property losses. Therefore, it is necessary for us to carry out real-time health monitoring of ships to eliminate possible dangers and improve the safety performance of ships. [0003] Most of the current health monitoring sensors still use traditional electronic sensors, and currently mainly use resistive strain gauges. However, there are many connecting wires in this method, which will aff...

AI Technical Summary

Problems solved by technology

[0004] In specific engineering projects, the traditional single-mode fiber grating strain sensor has a more complex and changeable working environment. Commonly used bare fiber gratings are easy to break and cause signal loss. Moreover, for the research object of this ship structure, there are many measuring points. The traditional Single-mode fiber grating strain sensors require a large number and melting points, which increases time cost and economic cost

Images