Gas leak detection is one of the most vital issues in the mining and energy industries. Despite many highly specific and sensitive laser-based spectroscopic systems available on the market, the universal optical gas leak detector is still unattainable. In this paper we demonstrate the laser gas sensing setup capable of indirect detection of virtually any gas leaks using differential optical dispersion spectroscopy of oxygen near 761 nm. A semi-fiber interferometric setup with two multi-pass gas cells yields a signal proportional to the difference in O concentrations between two equal optical path length Herriott multipass cells, which is used to detect leaks of the non-absorbent nitrogen by sensing the dilution of atmospheric oxygen. This new kind of sensor could become a substantial contribution to developing gas-related industries, such as hydrogen fuel storage and transmission.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OE.543869 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Gas leak detection is one of the most vital issues in the mining and energy industries. Despite many highly specific and sensitive laser-based spectroscopic systems available on the market, the universal optical gas leak detector is still unattainable. In this paper we demonstrate the laser gas sensing setup capable of indirect detection of virtually any gas leaks using differential optical dispersion spectroscopy of oxygen near 761 nm.
View Article and Find Full Text PDFReal-Time Quantification of Gas Leaks Using a Snapshot Infrared Spectral Imager.
Sensors (Basel)
January 2025
Department of Optical Engineering, Utsunomiya University, 7-2-1 Yoto, Utsunomiya 321-8585, Japan.
We describe the various steps of a gas imaging algorithm developed for detecting, identifying, and quantifying gas leaks using data from a snapshot infrared spectral imager. The spectral video stream delivered by the hardware allows the system to combine spatial, spectral, and temporal correlations into the gas detection algorithm, which significantly improves its measurement sensitivity in comparison to non-spectral video, and also in comparison to scanning spectral imaging. After describing the special calibration needs of the hardware, we show how to regularize the gas detection/identification for optimal performance, provide example SNR spectral images, and discuss the effects of humidity and absorption nonlinearity on detection and quantification.
View Article and Find Full Text PDFComparative analysis of anticoagulant influence on PMI estimation based on porcine blood metabolomics profile measured using GC-MS.
Front Mol Biosci
January 2025
Department of Forensic Medicine, Medical University of Bialystok, Bialystok, Poland.
Introduction: Accurate post-mortem interval (PMI) estimation is essential in forensic investigations. Although various methods for PMI determination have been developed, only an approximate estimation is still achievable, and an accurate PMI indication is still challenging. Therefore, in this study, we employed gas chromatography-mass spectrometry (GC-MS)-based metabolomics to assess post-mortem changes in porcine blood samples collected with and without the addition of anticoagulant (EDTA).
View Article and Find Full Text PDFIdentification and treatment of false methane values produced by the tunable diode laser absorption spectroscopy technology equipped on unmanned aerial vehicles.
Integr Environ Assess Manag
January 2025
Ionian Department, University of Bari Aldo Moro, Bari, Italy.
Fugitive or diffuse methane emissions constitute an important source of damage to the environment, much greater even than CO2 both over a time span of 20 years and over a longer time span of 100. It is therefore of preeminent importance to undertake all the efforts necessary to implement new tools, protocols, and methods that contribute to the identification and measurement of these emissions to implement site-specific actions of mitigation, repair, and conscious management of the emitting plants. Among the remote sensing and leak detection technologies currently used, the tunable diode laser absorption spectroscopy (TDLAS) method plays a relevant role.
View Article and Find Full Text PDFPhysiological basis of non-invasive ventilation in the newborn.
Semin Perinatol
December 2024
Department of Women and Children's Health, School of Life Course Sciences, Faculty of Life Sciences and Medicine, King's College London, London, United Kingdom; Neonatal Intensive Care Unit, University of Patras, Patras, Greece. Electronic address:
Non-invasive ventilation (NIV) is a form of respiratory support provided primarily to preterm born infants in an effort to avoid any endotracheal intubation or as a weaning step following invasive ventilation. In the context of the respiratory distress syndrome of the newborn, NIV could target and partially reverse specific pathophysiological phenomena, by improving alveolar recruitment and establishing adequate functional residual capacity. It can also assist in minimizing lung injury by avoiding excessive pressure delivery, which can be harmful for the developing lung.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!