Fiber grating sensor pre-embedding method based on vacuum-assisted molding process

Abstract

The invention discloses a fiber grating sensor pre-embedding method based on a vacuum-assisted molding process, and belongs to the field of monitoring of the health of a ship hull. The method is mainly used for achieving the techniques of under the condition of vacuum-assisted molding, protecting tail fiber outlets of pre-embedded fiber sensors, sealing a tail fiber casing pipe, demolding a vacuumbag, separating the vacuum bag from the casing pipe, separating the casing pipe from tail fibers, etc. The fiber sensors are pre-embedded in a composite skin, the tail fibers are guided out of the sensors, the outlets are covered with the casing pipe (sealing pipe), the two ends are sealed with sealing gum, after the vacuum-assisted molding process is completed, the vacuum bag is demolded and separated from the casing pipe, then the casing pipe is subjected to ring cutting to be separated from the tail fibers, and then the exposed fibers can be subjected to fiber splicing and networking. According to the fiber grating sensor pre-embedding method, the upstream is integrated with the fiber sensing networking technology, and the downstream is integrated with the fiber sensor packaging technique, so that an intelligent monitoring network of a whole ship is constructed, health monitoring and intelligent sensing of the composite ship hull under a pre-embedding condition are achieved, and afoundation is laid for achieving the intellectualization of the ship.

Description

technical field [0001] The invention belongs to the field of hull health monitoring, and more specifically relates to a pre-embedding method of an optical fiber grating sensor based on a vacuum-assisted forming process. Background technique [0002] Composite materials have the characteristics of light weight, high strength, good corrosion resistance, good insulation and temperature resistance, good construction technology and designability, and have been widely used in the shipbuilding industry. Due to the advantages of simple operation and low cost, the vacuum-assisted forming process is the most widely used in the shipbuilding field. [0003] At present, the domestic application of composite materials on ships is mainly to accumulate experience in composite material hull structure design, calculation, performance verification, process preparation, etc., to provide technical reserves for subsequent large-scale applications, and to carry out mechanical performance analysis ...

AI Technical Summary

Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention proposes a pre-embedding method for fiber grating sensors based on vacuum-assisted molding process, thereby solving the problem that the tail fiber of the optical fiber sensor is easily broken due to resin infiltration under the vacuum-assisted molding process. Technical problems that cannot be welded to the network

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