Optical fiber hydrogen detecting device based on light heating

A detection device, optical heating technology, applied in the direction of measuring devices, material analysis through optical means, instruments, etc., can solve problems such as cross-sensitivity, explosion, etc., achieve the effect of eliminating performance interference, broad application prospects, and improving measurement accuracy

Active Publication Date: 2015-09-09
WUHAN UNIV OF TECH
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Problems solved by technology

[0004] At present, the hydrogen sensors that are relatively mature in technology are mainly electrochemical sensors. This type of sensor uses electrical signals as the sensing signal, and there is a possibility of generating electric sparks during work, so it still has a potential explosion hazard; in additio

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  • Optical fiber hydrogen detecting device based on light heating
  • Optical fiber hydrogen detecting device based on light heating
  • Optical fiber hydrogen detecting device based on light heating

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Embodiment Construction

[0030] The invention is an optical fiber hydrogen detection device based on light heating, in which a high reflection grating, a low reflection grating and a short period grating are prepared in the same optical fiber, a hydrogen sensitive film is deposited on the end face of the optical fiber, and a power adjustable pumping light source is used as a heating light source, flat The ASE light source is used as the sensing light source. The reflection peak intensity of the high-reflection grating is used as the reference signal, and the baseline, side lobe intensity or the reflection peak intensity of the low-reflection grating near the reflection peak of the high-reflection grating is used as the sensing signal, and the hydrogen concentration is measured by the ratio of the two. This structural design has better anti-interference ability. Use the heating light source to heat the hydrogen sensitive film deposited on the end face of the short-period grating. The spectrometer measu...

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Abstract

The invention discloses an optical fiber hydrogen detecting device based on light heating. The device is characterized by consisting of a sensing light source (1), an optical fiber coupler (6), an optical circulator (7) and a sensing probe (8) which are connected in sequence, and a heating light source (2), an electronic control unit (3), a computer (4) and a spectrometer (5) which are connected in sequence, wherein the heating light source (2) and the spectrometer (5) are connected with the optical fiber coupler (6) and the optical circulator (7), respectively. The optical fiber hydrogen detecting device has the advantages of being capable of ensuring the sensitivity of the sensing probe in different atmosphere environments, being good in temperature resistance, humidity resistance and resistance to light-intensity variation interference in an optical fiber, being high in practicability, having a compensation function, accurately measuring the hydrogen concentration and having broad application prospect in hydrogen safety monitoring in the fields of energy sources, chemical engineering and the like in China.

Description

technical field [0001] The invention belongs to the intersecting field of optical fiber sensing technology, material science and optoelectronic technology, relates to functional material preparation and photoelectric detection technology, and specifically relates to an optical fiber hydrogen detection device with self-compensation function. Background technique [0002] Energy consumption and environmental pollution represented by coal and oil are a major problem in today's society. In recent years, my country has been deeply affected by air pollution (severe smog) and ecological environment deterioration. The development and use of new clean energy is the future of the country. A strategic need. Among the many new energy sources, hydrogen energy is one of the future energy sources with great development potential. In the long run, its development may bring about major changes in the energy structure. Because hydrogen has the characteristics of small molecular weight, strong...

Claims

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Application Information

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IPC IPC(8): G01N21/17
Inventor 代吉祥杨明红王高鹏黄楚佳祁宠杰
Owner WUHAN UNIV OF TECH
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