Fiber bragg grating water current velocity sensor

A technology of flow velocity sensor and optical fiber grating, which is applied in the field of sensors, can solve the problem of few water flow velocity sensors, and achieve the effects of high sensitivity, simple structure and wide measurement range

Active Publication Date: 2018-01-05
SHIJIAZHUANG TIEDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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  • Fiber bragg grating water current velocity sensor
  • Fiber bragg grating water current velocity sensor

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Embodiment Construction

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0020] Reference Figure 1-2 , The fiber grating water flow velocity sensor includes a cylindrical hollow base 1, a support frame 2 is installed on the bottom inner wall of the base 1, and the support frame 2 is coaxially arranged with the base 1, and the top of the support frame 2 is movably sleeved with a push rod 3 to push A baffle 14 fixedly connected to the inner wall of the base 1 is installed above one end of the rod 3 protruding from the support frame 2. A spring 4 is installed between the baffle 14 and the push rod 3, and one side of the spring 4 is glued along its length. A strain grating 5 and a temperature compensation grating 1...

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PUM

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P5/00
Inventor 张浩胡军海段君淼钟志鑫刘凯甘鹭叶勇韩亚爽
Owner SHIJIAZHUANG TIEDAO UNIV
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