TY - JOUR
T1 - High-precision detection of acetylene using photoacoustic spectroscopy with a three-step cylindrical cell
AU - Wang, Qiaoyun
AU - Li, Lei
AU - Xu, Shunyuan
AU - Zhu, Ziheng
AU - Wang, Jilong
AU - Zou, Xin
AU - Liu, Qiang
AU - Cheng, Jibing
AU - Fu, Richard
PY - 2024/7/1
Y1 - 2024/7/1
N2 - High-precision photoacoustic spectroscopy (PAS) with a three-step cylindrical photoacoustic cell (TSC-PAC) was developed for acetylene (C2H2) detection. Finite element analysis was used to investigate the acoustic properties of the proposed TSC-PAC and conventional H-type cylindrical photoacoustic cell (HTC-PAC). Simulation results showed that acoustic pressure signal of the TSC-PAC was higher than that of HTC-PAC with the same dimension. Resonance frequency of the TSC-PAC was identified at 984 Hz. In experimental studies, a plane mirror was used to reflect the incident light and increase the optical length in the PAC. A silicon-cantilever-based fiber-optic sensor was positioned at the terminal point of the TSC-PAC, where the maximum photoacoustic (PA) signal was located. With C2H2 concentration of 100 ppm, the 2f signal of TSC-PAC was 1.43 times that of HTC-PAC. When the integration time was 100 s, the linear fitting (R2) and minimum detection limit (MDL) of C2H2 measured by TSC-PAC at the atmospheric pressure were 0.996 and 13.74 ppb, respectively. The normalized noise equivalent absorption (NNEA) coefficient was 8.18×10-8cm-1·W·Hz-1/2. Both simulation and experimental results proved that the developed TSC-PAC enhanced the performance of the PAS and it had certain application potential in the PAS.
AB - High-precision photoacoustic spectroscopy (PAS) with a three-step cylindrical photoacoustic cell (TSC-PAC) was developed for acetylene (C2H2) detection. Finite element analysis was used to investigate the acoustic properties of the proposed TSC-PAC and conventional H-type cylindrical photoacoustic cell (HTC-PAC). Simulation results showed that acoustic pressure signal of the TSC-PAC was higher than that of HTC-PAC with the same dimension. Resonance frequency of the TSC-PAC was identified at 984 Hz. In experimental studies, a plane mirror was used to reflect the incident light and increase the optical length in the PAC. A silicon-cantilever-based fiber-optic sensor was positioned at the terminal point of the TSC-PAC, where the maximum photoacoustic (PA) signal was located. With C2H2 concentration of 100 ppm, the 2f signal of TSC-PAC was 1.43 times that of HTC-PAC. When the integration time was 100 s, the linear fitting (R2) and minimum detection limit (MDL) of C2H2 measured by TSC-PAC at the atmospheric pressure were 0.996 and 13.74 ppb, respectively. The normalized noise equivalent absorption (NNEA) coefficient was 8.18×10-8cm-1·W·Hz-1/2. Both simulation and experimental results proved that the developed TSC-PAC enhanced the performance of the PAS and it had certain application potential in the PAS.
KW - Photoacoustic spectroscopy
KW - Three-step cylindrical photoacoustic cell
KW - Gas sensing
KW - Acetylene detection
UR - http://www.scopus.com/inward/record.url?scp=85193212138&partnerID=8YFLogxK
U2 - 10.1109/JSEN.2024.3398657
DO - 10.1109/JSEN.2024.3398657
M3 - Article
SN - 1530-437X
VL - 24
SP - 20719
EP - 20725
JO - IEEE Sensors Journal
JF - IEEE Sensors Journal
IS - 13
ER -