Dual-gas detection based on high-performance spherical photoacoustic cells
Oct 1, 2023 · In this paper, a PAS dual gas detection technique based on a high-performance SPAC is proposed. We theoretically discussed the acoustic characteristics of the SPAC and simulated various resonance modes of the SPAC by the FEA simulation.
Trace CH4 Gas Detection Based on an Integrated Spherical Photoacoustic Cell
May 28, 2021 · This paper presents an integrated spherical photoacoustic cell (SPAC) for trace methane (CH 4) 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.
A dual‐resonance enhanced photoacoustic spectroscopy gas …
May 27, 2024 · We propose a novel high-performance dual-resonance enhanced photoacoustic spectroscopy (DRE-PAS) gas sensor based on a highly sensitive fiber optic cantilever beam microphone and a high-Q spherical photoacoustic cell (PAC).
A high-sensitivity compact dual-T-type resonant fiber-optic ...
5 days ago · We propose a high-sensitivity compact dual-T-type resonant fiber-optic photoacoustic (DTR-FOPA) sensor for simultaneous detection of two gases. The designed DTR-FOPA sensor contains two T-type photoacoustic cells (PACs) and a cantilever-based fiber-optic acoustic sensor (CFOAS).
Highly sensitive and miniaturized microcone-curved resonant ...
This paper proposes a novel microcone-curved resonant photoacoustic cell (MCR-PAC) for highly sensitive trace gas detection. The MCR-PAC features with microcone-curved resonant region and cylindrical buffer chamber, which dominates the photoacoustic signal amplification.
Photoacoustic Spectroscopy Gas Detection Technology Research …
Nov 7, 2023 · Photoacoustic spectroscopy (PAS) gas detection technology is an indirect absorption spectroscopy method that directly detects the non-radiative relaxation channels of excited molecules. The photoacoustic effect refers to the phenomenon of converting optical signals into acoustic signals.
Multi-pass enhanced photoacoustic sensor for open gas sensing
Jun 8, 2024 · In this paper, a photoacoustic trace gas sensor based on a multi-pass enhanced open spherical photoacoustic cell (M-OPAC) was developed. A high-performance spherical photoacoustic (PA) cell was specially designed with high resonant frequency for suppressing various environmental noises, and integrated with a Herriot-type multi-pass optical ...
Dual-gas detection based on high-performance spherical photoacoustic cells
Oct 1, 2023 · A ppb-level H2S and CO photoac acoustic spectroscopy (PAS) gas sensor was developed by using a two-stage commercial optical fiber amplifier with a full output power of 10 W and a dual-resonator structural photoacoustic cell was theoretically simulated and designed with a finite element analysis.
Highly Sensitive Sphere-Tube Coupled Photoacoustic Cell Suitable …
Dec 30, 2021 · 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.
A dual‐resonance enhanced photoacoustic spectroscopy gas …
We propose a novel high‐performance dual‐resonance enhanced photoacoustic spectroscopy (DRE‐PAS) gas sensor based on a highly sensitive fiber optic cantilever beam microphone and a high‐Q spherical photoacoustic cell (PAC).