Modeling of a cylindrical resonant photoacoustic cell for high sensitive gas detection

2021 ◽  
Author(s):  
Qi Huang ◽  
Sheng Zhou ◽  
Tianbo He ◽  
Jingsong Li
Keyword(s):  
Gas Detection ◽  
Photoacoustic Cell

Miniaturized resonant photoacoustic cell of inclined geometry for trace-gas detection

TDLS 2009 ◽  
2011 ◽  
pp. 51-57
Author(s):  
A. V. Gorelik ◽  
A. L. Ulasevich ◽  
F. N. Nikonovich ◽  
M. P. Zakharich ◽  
V. A. Firago ◽  
...  
Keyword(s):  
Gas Detection ◽  
Trace Gas ◽  
Photoacoustic Cell ◽  
Trace Gas Detection

scholarly journals Trace CH4 Gas Detection Based on an Integrated Spherical Photoacoustic Cell

2021 ◽  
Vol 11 (11) ◽  
pp. 4997
Author(s):  
Yexiang Jiao ◽  
Hongji Fan ◽  
Zhenfeng Gong ◽  
Kai Yang ◽  
Feiyang Shen ◽  
...  
Keyword(s):  
Resonant Frequency ◽  
High Speed ◽  
Gas Detection ◽  
Laser Source ◽  
Photoacoustic Cell ◽  
Long Distance ◽  
Element Simulation ◽  
Resonant Modes ◽  
All Optical ◽  
Dfb Laser

This paper presents an integrated spherical photoacoustic cell (SPAC) for trace methane (CH4) gas detection. Theoretical analysis and analogue simulations are carried out to analyze the acoustic field distribution of the SPAC at resonant and non-resonant modes. The finite element simulation results based on COMSOL show that the first-order radial resonant frequency and second-order angular resonant frequency are 24,540 Hz and 18,250 Hz, respectively, which show good agreements with the formula analysis results. The integrated SPAC, together with a high-speed spectrometer and a distributed feedback (DFB) laser source, makes up a photoacoustic (PA) spectroscopy (PAS) system, which is employed for CH4 detection. The minimum detection limit (MDL) is measured to be 126.9 parts per billion (ppb) at an average time of 1000 s. The proposed SPAC has an integrated, miniaturized and all-optical structure, which can be used for remote and long-distance trace gas detection.

scholarly journals Integration of T-type half-open photoacoustic cell and fiber-optic acoustic sensor for trace gas detection

2019 ◽  
Vol 27 (13) ◽  
pp. 18222 ◽  
Author(s):  
Zhenfeng Gong ◽  
Ke Chen ◽  
Yewei Chen ◽  
Liang Mei ◽  
Qingxu Yu
Keyword(s):  
Fiber Optic ◽  
Gas Detection ◽  
Trace Gas ◽  
Acoustic Sensor ◽  
Photoacoustic Cell ◽  
Trace Gas Detection ◽  
Open Photoacoustic Cell

scholarly journals Highly Sensitive Sphere-Tube Coupled Photoacoustic Cell Suitable for Detection of a Variety of Trace Gases: NO2 as an Example

Sensors ◽  
2021 ◽  
Vol 22 (1) ◽  
pp. 281
Author(s):  
Zhengang Li ◽  
Ganshang Si ◽  
Zhiqiang Ning ◽  
Jiaxiang Liu ◽  
Yonghua Fang ◽  
...  
Keyword(s):  
Trace Gases ◽  
High Sensitivity ◽  
Acoustic Resonance ◽  
Living Environment ◽  
Detection Sensitivity ◽  
Gas Detection ◽  
Atmospheric Environment ◽  
Photoacoustic Cell ◽  
Photoacoustic Detection ◽  
Modulated Light

The concentration of trace gases in the atmospheric environment is extremely low, but it has a great impact on the living environment of organisms. Photoacoustic spectroscopy has attracted extensive attention in the field of trace gas detection because of its high sensitivity, good selectivity, and fast response. As the core of a photoacoustic detection setup, the photoacoustic cell has a significant impact on detection performance. To improve detection sensitivity, a sphere-tube coupled photoacoustic cell (STPAC) was developed, which was mainly composed of a diffuse-reflective sphere and an acoustic resonance tube. Modulated light was reflected multiple times in the sphere to increase optical path, and photoacoustic (PA) signals were further amplified by the tube. Based on STPAC, a PA gas detection setup was built with a laser diode (LD) at 450 nm as the light source. The experimental results showed that the minimum detection limit (noise equivalent concentration, NEC) of NO2 was ~0.7 parts per billion (ppb). Compared with the T-type PA cell (TPAC) in which the modulated light passed through the sphere, the signal-to-noise ratio of STPAC was increased by an order of magnitude at the same concentration of the NO2 sample.

Compact Resonance Π-Shaped Photoacoustic Cell for Gas Detection

2014 ◽  
Vol 81 (3) ◽  
pp. 470-475
Author(s):  
A. L. Ulasevich ◽  
A. V. Gorelik ◽  
A. A. Kouzmouk ◽  
V. S. Starovoitov
Keyword(s):  
Gas Detection ◽  
Photoacoustic Cell

scholarly journals Miniaturized resonant photoacoustic cell of inclined geometry for trace-gas detection

2010 ◽  
Vol 100 (2) ◽  
pp. 283-289 ◽  
Author(s):  
A. V. Gorelik ◽  
A. L. Ulasevich ◽  
F. N. Nikonovich ◽  
M. P. Zakharich ◽  
V. A. Firago ◽  
...  
Keyword(s):  
Gas Detection ◽  
Trace Gas ◽  
Photoacoustic Cell ◽  
Trace Gas Detection

Design and characteristics of a differential Helmholtz resonant photoacoustic cell for infrared gas detection

1999 ◽  
Vol 40 (1) ◽  
pp. 1-23 ◽  
Author(s):  
V. Zeninari ◽  
V.A. Kapitanov ◽  
D. Courtois ◽  
Yu.N. Ponomarev
Keyword(s):  
Gas Detection ◽  
Photoacoustic Cell

THEORY OF SIGNAL GENERATION IN A PHOTOACOUSTIC CELL

1983 ◽  
Vol 44 (C6) ◽  
pp. C6-27-C6-34 ◽  
Author(s):  
B. K. Bein ◽  
J. Pelzl
Keyword(s):  
Signal Generation ◽  
Photoacoustic Cell
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