Optical fiber hydrogen detecting device based on light heating

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...

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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 addition, because it is based on Electron migration leads to electrical parameter sensing of resistance change, and the sensor has the possibility of cross-sensitivity to other reducing gases, so traditional electrochemical sensors still have some insurmountable problems in terms of safety and selection sensitivity

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