A sensor device suitable for structural health monitoring of an underwater platform

Abstract

The application discloses a sensor device suitable for underwater platform structure health monitoring, which comprises a waterproof shell in a cylindrical barrel structure and without a bottom, a gland fixedly sleeved at the bottom of the waterproof shell, a sensitized rope and a fiber grating sensor; two self-pulling rods with through holes at the ends are arranged on the inner top surface of the waterproof shell at intervals, and a sensitized rope through hole and a fiber through hole are respectively arranged on the side walls of the waterproof shell at opposite positions; a base formed by three layers of circular plates is arranged on the inner bottom surface of the gland, the diameter of the circular plate in the middle layer is larger than that of the upper and lower layers, the thickness of the circular plate in the middle layer is smaller than that of the upper and lower layers, and the circular plate in the middle layer is a deformation bearing layer; two independent pulling rods with through holes at the ends are fixed on the circular plate of the top layer of the base at intervals; the two self-pulling rods, the two independent pulling rods, the sensitized rope through hole and the fiber through hole are on the same center line, and h is limited to be greater than x, and the application can satisfy long-term real-time monitoring of the expansion and bending strain of the underwater platform structure and achieve a sensitization effect.

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