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Durability optimization method of fiber bragg grating hydrogen sensor

A technology of fiber grating and optimization method, which is used in instruments, scientific instruments, material analysis by optical means, etc., can solve the problems of measurement error, complicated wiring, and reduce sensor sensitivity, and achieve the effect of improving durability.

Pending Publication Date: 2021-10-26
南京鋆扬信息科技有限公司 +2
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Problems solved by technology

Most of the mature hydrogen sensors on the market are based on electrochemical principles, which are easily affected by the external environment and reduce the sensitivity of the sensor, resulting in measurement errors; and are prone to sparks during use. For the liquid hydrogen fuel used in aerospace There are extremely high risks, and the wiring is too complicated and takes up a lot of space

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  • Durability optimization method of fiber bragg grating hydrogen sensor
  • Durability optimization method of fiber bragg grating hydrogen sensor
  • Durability optimization method of fiber bragg grating hydrogen sensor

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Embodiment Construction

[0037] The present invention will be described in more detail below with reference to schematic diagrams, wherein preferred embodiments of the present invention are shown, and it should be understood that those skilled in the art can modify the present invention described herein while still achieving the advantageous effects of the present invention. Therefore, the following description should be understood as the broad knowledge of those skilled in the art, but not as a limitation of the present invention.

[0038] This embodiment adopts the following ideas: (1) first simulate the fiber grating thin film process, and use the finite element simulation method to determine the optimal coating process parameters; (2) use a magnetron sputtering instrument and a fusion splicer to prepare a fiber grating sensor; ( 3) Use the self-built test device to simulate hydrogen leakage, and verify the sensor monitoring effect according to the sensor wavelength drift.

[0039] A method for opt...

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Abstract

The invention provides a durability optimization method of the fiber bragg grating hydrogen sensor. The method comprises: using ANSYS software for simulating the process of optical fiber coating, and based on a simplified two-dimensional model, simulating the influence of different film layer thicknesses, film coating speeds and film layer numbers on residual Mises equivalent stress values of a film-fiber grating by adopting a life-death unit method, carrying out related experimental verification, further selecting optimal film coating process parameters, and finally obtaining the stable fiber grating hydrogen sensor with relatively high precision and relatively short response time. And the dangerous phenomenon of hydrogen leakage can be timely and accurately monitored.

Description

technical field [0001] The invention belongs to the technical field of optical fiber grating hydrogen sensors, in particular to a method for optimizing the durability of optical fiber grating hydrogen sensors. Background technique [0002] Hydrogen is a clean energy source and an important chemical raw material, which is widely used in aerospace, fuel cell vehicles, metal smelting, and chemical synthesis. Since hydrogen has the smallest molecule, hydrogen leaks easily. When the hydrogen reaches a certain content in the air (volume 4%-74.4%), it is easy to be ignited and cause an explosion accident, so the detection of hydrogen concentration is very important. Most of the mature hydrogen sensors on the market are based on electrochemical principles, which are easily affected by the external environment and reduce the sensitivity of the sensor, resulting in measurement errors; and are prone to sparks during use. For the liquid hydrogen fuel used in aerospace There are extrem...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/84G01N21/17G01N21/01
CPCG01N21/84G01N21/17G01N21/01
Inventor 杨国玉马雯波李昱洋范丽马增胜许福陈俊
Owner 南京鋆扬信息科技有限公司
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