Research on the selection and layout of the cantilever sensor based on photoacoustic spectroscopy gas detection technology

Gas detection has become an indispensable part of the power equipment maintenance. Because many advantages, cantilever enhanced photoacoustic(PA) spectroscopy was studied by researchers. In this paper, with help Finite Element Method (FEM) simulations commercial software COMSOL, we have analyzed distribution sound pressure inside gas cell, in addition, relationship between Young's modulus and size beam its deformation, eigen-frequencies were also obtained. Besides, performed experiment deformation measurement. The results show that: for when it works at first order resonance frequency, maximum value appears geometric center. For main cavity, length radius increase, frequency cell decreases. Under condition ideal linear source, as cavity changes, domain, response curve corresponds PA 85 mm 2 radius. beam, increase modulus, is proportional to fourth length, whereas inversely width third thickness. However, experimental showed that there may be a deviation vibration measurements meter. As eigen-frequency, negatively correlated positively thickness, but independent width. With distance source