Remote laser analyzer for methane sensing in the air of subterranean spaces

2002 ◽  
Author(s):  
Yuri N. Frolov ◽  
Sergey D. Velikanov ◽  
Victor I. Lazarenko ◽  
Yuriy N. Aksyonov ◽  
Sergey N. Sin'kov ◽  
...  
Keyword(s):  
Laser Analyzer

Remote laser analyzer for methane sensing in the air of subterranean spaces

2003 ◽  
Author(s):  
Yuri N. Frolov ◽  
Sergey D. Velikanov ◽  
Victor I. Lazarenko ◽  
Yuriy N. Aksenov ◽  
Sergey N. Sin'kov ◽  
...  
Keyword(s):  
Laser Analyzer

A laser analyzer of the kinetics of interaction of water molecules with an adsorbent

2013 ◽  
Vol 56 (5) ◽  
pp. 602-606 ◽  
Author(s):  
V. G. Artemov ◽  
P. O. Kapralov ◽  
D. M. Kurmasheva ◽  
V. I. Tikhonov ◽  
A. A. Volkov
Keyword(s):  
Water Molecules ◽  
Laser Analyzer ◽  
Kinetics Of

Effect of Aluminum Powder on the Luminous Intensity of an Illuminant

2012 ◽  
Vol 512-515 ◽  
pp. 2689-2692 ◽  
Author(s):  
Jia Hui Qu ◽  
Hai Xia Duan ◽  
Xue Feng Du
Keyword(s):  
Particle Size ◽  
Aluminum Powder ◽  
Chemical Method ◽  
Particle Diameter ◽  
Fine Powder ◽  
Luminous Intensity ◽  
Change Rate ◽  
Photo Effect ◽  
Laser Analyzer

The particle diameter and luminous intensity of aluminum powder were measured by laser analyzer and photo-effect tester. The luminous intensity of [Ba(NO3)2＋Al] illuminant were studied for different shape and diameter of aluminum powder as well as ultra-fine powder prepared by chemical method. The results show that the luminous intensity increases with particle size reduced, and luminous intensity of non-spherical aluminum is more than that of spherical aluminum. The change rate of luminous intensity increases rapidly when particle diameter was less than 2μm. It’s change rate in [0.6，2.13] is 4.37 times that in [2.13，4.24] interval.The ultra-fine aluminum powder and the submicron aluminum powder can effectively enhance the luminous performance of pyrotechnics.

Laser analyzer of capillary blood flow in microcirculation diagnosis

1994 ◽  
Author(s):  
Valentine I. Kozlov ◽  
Victor F. Morskov ◽  
Valentine I. Kishko ◽  
Vladimir G. Sokolov ◽  
Oleg A. Terman ◽  
...  
Keyword(s):  
Blood Flow ◽  
Capillary Blood ◽  
Capillary Blood Flow ◽  
Laser Analyzer

scholarly journals PROPERTIES RESEARCH OF ALUMINUM HYDROXIDE POWDER OBTAINED THROUGH CHEMICAL DISPERSION OF ALLOY V95 SCRAP

2019 ◽  
Vol 2019 (12) ◽  
pp. 58-61
Author(s):  
Anatolyi Shlyapin ◽  
Dmitriy Nechaev ◽  
Asif Omarov ◽  
Nikolay Ivanov ◽  
Tat'yana Skakova
Keyword(s):  
Specific Surface ◽  
Rheological Properties ◽  
Ceramic Material ◽  
Phase Analysis ◽  
Aluminum Hydroxide ◽  
Chemical Dispersion ◽  
X Ray ◽  
Laser Analyzer

There is considered a possibility to obtain a new ceramic material of alloy V95 by means of chemical dispersion of chips and sintering aluminum hydroxide powder obtained. The rheological properties of the powder obtained are analyzed, with the aid of laser analyzer there is defined an average particles size and their specific surface, the X-ray phase analysis is carried out.

Measurement of automobile N2O from bag and continuous stream by quantum cascade laser spectroscopy

2018 ◽  
Vol 20 (2) ◽  
pp. 261-273 ◽  
Author(s):  
Montajir Rahman ◽  
Richard Rooney ◽  
Kenji Hara ◽  
Shigeru Nakatani
Keyword(s):  
United States ◽  
Laser Spectroscopy ◽  
Quantum Cascade Laser ◽  
The United States ◽  
Environment Protection ◽  
Protection Agency ◽  
Mid Infrared ◽  
Quantum Cascade ◽  
Laser Analyzer ◽  
Accuracy And Repeatability

N2O emission from automobile has been regulated by the United States Environment Protection Agency due to its higher global warming potential compared to CO2. Responding to this, an instrument for fast sensing of ultra-low concentration of N2O from automobile has become an urgent need. In this study, an instrument based on the quantum cascade laser spectroscopy has been developed and applied for certification testing of ultra-low N2O in automobile exhaust. The pulsed quantum cascade laser can emit coherent lights in the mid-infrared region where N2O shows strong absorption and better control of wavelength. Therefore, a very low detection limit can be achieved and interference of co-existing gases can be avoided using a super fine resolution of the mid-infrared spectrum. The US Code of Federal Regulations Parts 1065/1066 allows measuring N2O from sample storage bags, from a continuous dilute stream or a raw exhaust stream. Typically, batch (bag) sampling has better accuracy and repeatability, but continuous sampling is more efficient in terms of test cell running time and provides test-mode emissions. In this study, the quantum cascade laser analyzer has been applied to investigate correlations between bag sampling and continuous dilute exhaust sampling using a fleet of vehicles with a wide range of N2O emission levels all meeting United States Environment Protection Agency emission standards. Very good correlation between these two sampling methods was observed for the majority of tests conducted and in best case the difference was less than ±1%. The direct injection gasoline vehicle emits higher N2O than conventional port injection gasoline vehicles. The quantum cascade laser analyzer has been successfully applied for United States Environment Protection Agency N2O certification test.

Dual-beam laser analyzer for inhomogeneities in active regions of multielement photodetectors

2006 ◽  
Vol 73 (2) ◽  
pp. 313-316 ◽  
Author(s):  
O. A. Grebenshchikov ◽  
V. B. Zalesskii ◽  
V. V. Naumov
Keyword(s):  
Active Regions ◽  
Beam Laser ◽  
Dual Beam ◽  
Laser Analyzer
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