Gas detection device and method based on graphene coated quartz tuning fork

Abstract

According to the gas detection device and method based on the graphene coated quartz tuning fork provided by the invention, the adopted graphene and derivatives thereof have excellent adsorbability to characteristic gas, and meanwhile, the Q value of the quartz tuning fork is extremely high, so that quantitative information of gas concentration can be well reflected on frequency deviation; gas detection can be completed only by detecting the resonant frequency change of the quartz tuning fork. Compared with the prior art, a peripheral circuit is simple, the size is small, power consumption is low, and good detection sensitivity can be guaranteed; an expensive and huge light source is not needed as an excitation source, complicated and time-consuming light beam collimation is not needed, the cost is low, and the operation is simple; multi-point long-distance detection of different gases can be completed in a time-sharing / frequency-dividing manner by connecting the graphene coated quartz tuning forks with different coated films and frequency response characteristics in parallel. The gas sensor has a wide application prospect in the field of gas detection sensitive to detection distance, monitoring range, portability and cost.

Description

technical field [0001] The invention relates to the technical field of gas measurement, in particular to a gas detection device and method based on a graphene-coated quartz tuning fork. Background technique [0002] With the rapid development of society's economy and productivity, environmental pollution is becoming more and more serious, and the excessive discharge of various toxic and harmful gases has made various environmental degradation problems unavoidable all over the world. Among them, methane, sulfur dioxide, nitrogen dioxide, ozone and other gases are the chief culprits of environmental problems such as global warming, photochemical pollution, ozone layer hole and acid rain. Therefore, qualitative and quantitative detection of various gases in people's working and living environment, and real-time grasp of the concentration information of various gases in the surrounding atmospheric environment are of great significance for protecting the atmospheric environment a...

AI Technical Summary

Problems solved by technology

However, quartz-enhanced photoacoustic spectroscopy usually requires the use of an expensive and bulky laser as the light source to vibrate the tuning fork to achieve measurement. At the same time, the laser has high requirements for the collimation of the laser beam, resulting in large volume, high cost and high cost of equipment for this technology. Inconvenient to use

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