State Grid Anhui Electric Power Research Institute

Dalian University of Technology

State Grid Corporation of China

Fengxiang Ma

Yue Zhao

Yu Tian

Wei Liu

Liufang Wang

Ke Chen

Chen Hang

Feng Zhu

Zien Liu

Yabin Ma

Jiong Qi

Xiaofang Yuan

Min Guo

A multifunctional CFN/COmixed gas preparation system is disclosed. The CFN heat exchanger is used to heat and vaporize CFN input through the CFN input port; the COheat exchanger is used to heat and vaporize COinput through the COinput port; the CFN/COmixing pipeline structure is used to mix the heated CFN and heated CO, and the CFN/COmixed gas output pipeline structure is used to output the CFN/COmixed gas. The CFN/COmixing pipeline structure comprises a CFN/COdynamic gas preparation pipeline structure and a CFN/COpartial pressure mixing pipeline structure; the CFN/COpartial pressure mixing pipeline structure includes partial pressure mixing tanks for mixing the COand the heated CFN of certain pressures; and a plurality of partial pressure mixing tanks are arranged in parallel. A multifunctional CFN/COmixed gas preparation method is also disclosed.

Multifunctional CFN/COmixed gas preparation system and preparation method

The present disclosure relates to the technical field of fiber-optic gas sensing and laser photoacoustic spectroscopy, and reliability of a gas detection system is improved by actively selecting a working frequency of low noise interference combined with an optical fiber photoacoustic sensing probe capable of isolating high-frequency noise. A gas enters a photoacoustic microcavity through gaps on a sound-sensitive diaphragm after diffusing into a miniature air chamber through a plurality of micropores. Photoacoustic excitation light is incident into the photoacoustic microcavity through a fiber-optic collimator and then excited to generate a photoacoustic pressure wave to cause the sound-sensitive diaphragm to vibrate periodically. An end face of a single-mode optical fiber and the sound-sensitive diaphragm constitutes a fiber-optic Fabry-Perot interferometer. The interferometer measures a deflection of the diaphragm and inverts a concentration of the to-be-measured gas.

Fiber-optic photoacoustic sensing probe capable of resisting interference from ambient noise, and sensing system

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Anhui, China

Fengxiang Ma