Hydrogen gas concentration measurement in small area using raman lidar measurement technnology

When change of hydrogen(H2) gas concentration in a certain point is measured, non-contact measurement technology with high temporal and spatial resolution is necessary. In this study, H2 concentration in the small area of <1cm2 under the gas flow was measured by using a Raman lidar. Raman scattering light at the measurement point of 750mm ahead was detected by the Raman lidar. As a result, it was proved that the H2 concentration of more than 100ppm could be successfully measured.

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Remotely measuring the hydrogen gas by using portable Raman lidar system

Optica Applicata ◽

10.37190/oa210103 ◽

2021 ◽

Vol 51 (1) ◽

Author(s):

In Young Choi ◽

Sung Hoon Baik ◽

Young Soo Choi

Keyword(s):

Standard Deviation ◽

Photon Counting ◽

Hydrogen Gas ◽

Average Error ◽

Raman Lidar ◽

Gas Distribution ◽

Lidar System ◽

Gas Concentration ◽

Portable Raman

A Raman lidar system is able to detect the range of gas distribution and measure the hydrogen gas concentration remotely. This paper discusses the development of a photon counting Raman lidar system for remotely measuring the hydrogen gas concentration. To verify the developed photon counting Raman lidar system, experiments were carried out in outdoor conditions. As the results indicate, the developed photon counting Raman lidar system is possible to measure 0.66 to 100 vol% hydrogen gas concentrations at a distance of 30 m. In addition, the measuring average error measured 0.54% and the standard deviation is 2.42% at a distance of 30 m.

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Raman lidar for hydrogen gas concentration monitoring and future radioactive waste management

Optics Express ◽

10.1364/oe.25.030636 ◽

2017 ◽

Vol 25 (24) ◽

pp. 30636 ◽

Cited By ~ 1

Author(s):

Anasthase Liméry ◽

Nicolas Cézard ◽

Didier Fleury ◽

Didier Goular ◽

Christophe Planchat ◽

...

Keyword(s):

Radioactive Waste ◽

Waste Management ◽

Hydrogen Gas ◽

Raman Lidar ◽

Radioactive Waste Management ◽

Gas Concentration

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Remote sensing of hydrogen gas concentration distribution by Raman lidar

10.1117/12.977348 ◽

2012 ◽

Cited By ~ 3

Author(s):

Ippei Asahi ◽

Sachiyo Sugimoto ◽

Hideki Ninomiya ◽

Tetsuo Fukuchi ◽

Tatsuo Shiina

Keyword(s):

Remote Sensing ◽

Concentration Distribution ◽

Hydrogen Gas ◽

Raman Lidar ◽

Gas Concentration

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Atmosphere Activity Measurement by LED Raman Mini Lidar

EPJ Web of Conferences ◽

10.1051/epjconf/202023707002 ◽

2020 ◽

Vol 237 ◽

pp. 07002

Author(s):

Tatsuo Shiina

Keyword(s):

Raman Scattering ◽

Sea Water ◽

Mie Scattering ◽

Hydrogen Gas ◽

Activity Measurement ◽

Raman Lidar ◽

Gas Concentration ◽

Surface Atmosphere ◽

Scattering Signal ◽

Unique Relationship

The LED mini lidar was improved to monitor Raman scattering echoes. The Raman scattering signal indicates a certain gas concentration and it can distinguish the target from the other materials. It is so weak, 1/1000 of Mie scattering echoes, but even enough to be stimulated from the target gas with LED pulsed beam. At first, we developed a compact Raman lidar with micro pulse DPSS laser to detect hydrogen gas quantitatively. We replaced it with the LED pulse module, which was calculated enough potential to stimulate Raman scattering and detect the target gas. The next task is the activity measurement of such a target gas. To validate the potential of the LED Raman lidar, we conducted the sea surface atmosphere measurement. As a result, the unique relationship between the surface atmosphere and sea water echoes was observed. In this report, we state the concrete specification of the LED mini Raman lidar and some results of the activity observations.

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