scholarly journals A High Sensitivity Preamplifier for Quartz Tuning Forks in QEPAS (Quartz Enhanced PhotoAcoustic Spectroscopy) Applications

Sensors ◽  
2017 ◽  
Vol 17 (11) ◽  
pp. 2528 ◽  
Author(s):  
Tomasz Starecki ◽  
Piotr Wieczorek
Keyword(s):  
Photoacoustic Spectroscopy ◽  
High Sensitivity ◽  
Tuning Forks ◽  
Quartz Tuning Forks

scholarly journals Influence of Tuning Fork Resonance Properties on Quartz-Enhanced Photoacoustic Spectroscopy Performance

Sensors ◽  
2019 ◽  
Vol 19 (18) ◽  
pp. 3825 ◽  
Author(s):  
Huadan Zheng ◽  
Haoyang Lin ◽  
Lei Dong ◽  
Yihua Liu ◽  
Pietro Patimisco ◽  
...  
Keyword(s):  
Resonance Frequency ◽  
Quality Factor ◽  
Photoacoustic Spectroscopy ◽  
Electrical Resistance ◽  
Tuning Fork ◽  
Resonance Frequencies ◽  
Resonance Properties ◽  
Tuning Forks ◽  
Quartz Tuning Forks ◽  
Fundamental Resonance Frequency

A detailed investigation of the influence of quartz tuning forks (QTFs) resonance properties on the performance of quartz-enhanced photoacoustic spectroscopy (QEPAS) exploiting QTFs as acousto-electric transducers is reported. The performance of two commercial QTFs with the same resonance frequency (32.7 KHz) but different geometries and two custom QTFs with lower resonance frequencies (2.9 KHz and 7.2 KHz) were compared and discussed. The results demonstrated that the fundamental resonance frequency as well as the quality factor and the electrical resistance were strongly inter-dependent on the QTF prongs geometry. Even if the resonance frequency was reduced, the quality factor must be kept as high as possible and the electrical resistance as low as possible in order to guarantee high QEPAS performance.

scholarly journals Quartz Enhanced Photoacoustic Spectroscopy Based Trace Gas Sensors Using Different Quartz Tuning Forks

Sensors ◽  
2015 ◽  
Vol 15 (4) ◽  
pp. 7596-7604 ◽  
Author(s):  
Yufei Ma ◽  
Guang Yu ◽  
Jingbo Zhang ◽  
Xin Yu ◽  
Rui Sun ◽  
...  
Keyword(s):  
Gas Sensors ◽  
Photoacoustic Spectroscopy ◽  
Trace Gas ◽  
Tuning Forks ◽  
Quartz Tuning Forks

scholarly journals Photoacoustic spectroscopy for gas sensing: A comparison between piezoelectric and interferometric readout in custom quartz tuning forks

2020 ◽  
Vol 17 ◽  
pp. 100155 ◽  
Author(s):  
Stefano Dello Russo ◽  
Sheng Zhou ◽  
Andrea Zifarelli ◽  
Pietro Patimisco ◽  
Angelo Sampaolo ◽  
...  
Keyword(s):  
Photoacoustic Spectroscopy ◽  
Gas Sensing ◽  
Tuning Forks ◽  
Quartz Tuning Forks

Damping Mechanisms of Piezoelectric Quartz Tuning Forks Employed in Photoacoustic Spectroscopy for Trace Gas Sensing

2019 ◽  
Vol 216 (3) ◽  
pp. 1800552 ◽  
Author(s):  
Marilena Giglio ◽  
Giansergio Menduni ◽  
Pietro Patimisco ◽  
Angelo Sampaolo ◽  
Arianna Elefante ◽  
...  
Keyword(s):  
Photoacoustic Spectroscopy ◽  
Gas Sensing ◽  
Trace Gas ◽  
Piezoelectric Quartz ◽  
Tuning Forks ◽  
Trace Gas Sensing ◽  
Quartz Tuning Forks

scholarly journals High Sensitivity Continuous Monitoring of Chloroform Gas by Using Wavelength Modulation Photoacoustic Spectroscopy in the Near-Infrared Range

2021 ◽  
Vol 11 (15) ◽  
pp. 6992
Author(s):  
Tie Zhang ◽  
Yuxin Xing ◽  
Gaoxuan Wang ◽  
Sailing He
Keyword(s):  
Photoacoustic Spectroscopy ◽  
Continuous Monitoring ◽  
Near Infrared ◽  
Resonant Cavity ◽  
High Sensitivity ◽  
Industrial Applications ◽  
Detection Sensitivity ◽  
Infrared Range ◽  
Wavelength Modulation ◽  
Linear Coefficient

An optical system for gaseous chloroform (CHCl3) detection based on wavelength modulation photoacoustic spectroscopy (WMPAS) is proposed for the first time by using a distributed feedback (DFB) laser with a center wavelength of 1683 nm where chloroform has strong and complex absorption peaks. The WMPAS sensor developed possesses the advantages of having a simple structure, high-sensitivity, and direct measurement. A resonant cavity made of stainless steel with a resonant frequency of 6390 Hz was utilized, and eight microphones were located at the middle of the resonator at uniform intervals to collect the sound signal. All of the devices were integrated into an instrument box for practical applications. The performance of the WMPAS sensor was experimentally demonstrated with the measurement of different concentrations of chloroform from 63 to 625 ppm. A linear coefficient R2 of 0.999 and a detection sensitivity of 0.28 ppm with a time period of 20 s were achieved at room temperature (around 20 °C) and atmosphere pressure. Long-time continuous monitoring for a fixed concentration of chloroform gas was carried out to demonstrate the excellent stability of the system. The performance of the system shows great practical value for the detection of chloroform gas in industrial applications.

scholarly journals Mutual interactions of oscillating quartz tuning forks in superfluid 4He

2013 ◽  
Vol 39 (10) ◽  
pp. 823-827 ◽  
Author(s):  
G. Sheshin ◽  
I. Gritsenko ◽  
D. Schmoranzer ◽  
L. Skrbek
Keyword(s):  
Superfluid 4He ◽  
Tuning Forks ◽  
Quartz Tuning Forks

Measuring the Prong Velocity of Quartz Tuning Forks Used to Probe Quantum Fluids

2010 ◽  
Vol 161 (5-6) ◽  
pp. 536-547 ◽  
Author(s):  
D. I. Bradley ◽  
P. Crookston ◽  
M. J. Fear ◽  
S. N. Fisher ◽  
G. Foulds ◽  
...  
Keyword(s):  
Quantum Fluids ◽  
Tuning Forks ◽  
Quartz Tuning Forks
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