All-optical gas detection method and device based on quartz enhanced photoacoustic spectrum

Abstract

The invention relates to photoacoustic spectrum measurement technologies, in particular to an all-optical gas detection method and a device based on a quartz enhanced photoacoustic spectrum, and solves the technical problems that detection signals are susceptible to electromagnetic environment interference and the device layout is easily influenced by the space size in existing photoacoustic spectrum technologies. The all-optical trace gas detection method based on the quartz enhanced photoacoustic spectrum includes: introducing a beam of probe light to the external side of arbitrary vibration arm of a tuning fork quartz crystal oscillator, gathering the information of intensity change caused by reflection direction change of reflected light received by one receiving plane fixed at a spatial position, and acquiring the concentration of a to-be-detected gas according to the intensity change information. The device only has optical components at a measurement site, thus having very strong anti-electromagnetic interference ability. The device and the method have very strong technical universality, and is completely applicable to remote nondestructive detection of environmental monitoring, food safety monitoring, industrial production control and other different fields.

Description

technical field [0001] The invention relates to photoacoustic spectrum measurement technology, in particular to an all-optical gas detection method and device based on quartz-enhanced photoacoustic spectroscopy. Background technique [0002] With the continuous development of science and technology and economic society, environmental problems are becoming more and more prominent. Whether it is for industrial production monitoring or people's healthy life, the monitoring of gas quality is becoming more and more important. Relevant researchers have been working on this Unremitting efforts. Laser photoacoustic spectroscopy technology is a relatively mature gas detection technology. It has the advantages of high detection sensitivity, large dynamic response range and fast response speed. It is widely used in air quality monitoring, petrochemical, aerospace medical and national defense research fields Has a wide range of applications. [0003] Traditional photoacoustic spectros...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides an all-optical gas detection method and device based on quartz-enhanced photoacoustic spectroscopy to solve the technical problems that the detection signal is easily interfered by the electromagnetic environment and the device layout is easily affected by the size of the space in the current quartz-enhanced photoacoustic spectroscopy technology.

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