Simulation Design of Photoacoustic Cell in Trace Gas Detection
Aiming at how to change the characteristic frequency of the photoacoustic cell and obtain the required frequency of the photoa-coustic cell,the finite element analysis method is used to study the H-type differential photoacoustic cell and the cylindrical photoa-coustic cell.The influence of the length and radius of the resonant tube,the length and radius of the buffer cavity on the characteristic frequency of the H-type differential photoacoustic cell is analyzed.The influence of the length and radius of the resonant cavity,the length and radius of the buffer cavity on the characteristic frequency of the cylindrical photoacoustic cell is analyzed in detail.The re-sults show that increasing the length and radius of the resonant cavity will reduce the characteristic frequency,and increasing the radius of the buffer cavity will reduce the characteristic frequency.
photoacoustic spectroscopyphotoacoustic cellfinite element simulationcharacteristic frequency
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