Fiber bragg grating water current velocity sensor

Abstract

The invention discloses a fiber bragg grating water current velocity sensor. The sensor herein includes a cylindrical hollow pedestal. The internal wall of the bottom part of the pedestal is providedwith a support rack, and the support rack and the pedestal are co-axially disposed. The top part of the support rack is movably sleeved with a pushing pole. One end of the pushing pole that extends from the support rack is provided thereabove with a flap which is in fixed connection to the internal side wall of the pedestal. The flap and the pushing pole are provided with a spring therebetween. One side of the spring is adhered to a strain grating in the length direction thereof. The top part of the pedestal is provided with a cable pipeline which is in communication with the inside of the pedestal. One end of the pushing pole that extends to the support rack is fixedly sleeved with a lantern ring. One end of the lantern away from the pushing pole is sleeved with a conduction rod. The external of the conduction rod is movably sleeved with a guide sleeve tube which is fixedly sleeved with the pedestal. One end of the guide sleeve tube that extends from the pedestal is movably sleeved with a universal plate. According to the invention, the sensor herein has the advantages of wide measurement range, high sensitivity, simple structure, and low cost. The sensor herein can real-time measure the changes of the velocity of water current, and can be widely applied to all water current situations.

Description

Technical field [0001] The invention relates to the technical field of sensors, in particular to a fiber grating water flow velocity sensor. Background technique [0002] During the long-term use of offshore structures, they are constantly affected by ocean currents, ocean wave impacts, and the growth of marine organisms. As a result, the dynamic softening of the offshore structure foundation and the erosion and aging of materials have led to the attenuation of offshore structural components and overall resistance. Affect the safety and durability of the structure. Therefore, long-term monitoring of ocean currents is important for grasping the evolution of the performance of offshore structures, evaluating the working conditions of the structures, and performing reasonable maintenance, avoiding various safety accidents, ensuring the safety of offshore structures and improving the service life. Significance, and water flow velocity is one of the main factors affecting the safety ...

AI Technical Summary

Problems solved by technology

At present, there are relatively few water velocity sensors using fiber gratings at home and abroad.

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