scholarly journals Remotely measuring the hydrogen gas by using portable Raman lidar system

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.

A hydrogen gas concentration measurement method using the Raman lidar system

2019 ◽  
Vol 30 (5) ◽  
pp. 055201
Author(s):  
In Young Choi ◽  
Sung Hoon Baik ◽  
Jung Ho Cha ◽  
Jin Ho Kim
Keyword(s):  
Measurement Method ◽  
Hydrogen Gas ◽  
Concentration Measurement ◽  
Raman Lidar ◽  
Lidar System ◽  
Gas Concentration

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

2018 ◽  
Vol 176 ◽  
pp. 01019 ◽  
Author(s):  
Sachiyo Sugimoto ◽  
Ippei Asahi ◽  
Tatuso Shiina
Keyword(s):  
Small Area ◽  
Gas Flow ◽  
Hydrogen Gas ◽  
Measurement Technology ◽  
Lidar Measurement ◽  
Measurement Point ◽  
Raman Lidar ◽  
Gas Concentration ◽  
Scattering Light ◽  
Temporal And Spatial

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.

Raman lidar system for methane gas concentration measurements

1986 ◽  
Vol 25 (13) ◽  
pp. 2115 ◽  
Author(s):  
J. Douglas Houston ◽  
Sebastian Sizgoric ◽  
Arkady Ulitsky ◽  
John Banic
Keyword(s):  
Raman Lidar ◽  
Lidar System ◽  
Gas Concentration ◽  
Methane Gas ◽  
Concentration Measurements

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

2017 ◽  
Vol 25 (24) ◽  
pp. 30636 ◽  
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

Remote sensing of hydrogen gas concentration distribution by Raman lidar

2012 ◽  
Author(s):  
Ippei Asahi ◽  
Sachiyo Sugimoto ◽  
Hideki Ninomiya ◽  
Tetsuo Fukuchi ◽  
Tatsuo Shiina
Keyword(s):  
Remote Sensing ◽  
Concentration Distribution ◽  
Hydrogen Gas ◽  
Raman Lidar ◽  
Gas Concentration

scholarly journals Atmosphere Activity Measurement by LED Raman Mini Lidar

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.

scholarly journals Inter-comparison of ABL height estimates from different profiling sensors and models in the framework of HyMeX-SOP1

2021 ◽  
Author(s):  
Donato Summa ◽  
Fabio Madonna ◽  
Noemi Franco ◽  
Bendetto De Rosa ◽  
Paolo Di Girolamo
Keyword(s):  
Friction Velocity ◽  
Hydrological Cycle ◽  
Weather Conditions ◽  
Raman Lidar ◽  
Lidar System ◽  
Combined Application ◽  
Radiosonde Station ◽  
Atmospheric Dynamic ◽  
Thermodynamic Variables ◽  
Good Agreement

Abstract. This paper reports results from an inter-comparison effort involving different sensors/techniques used to measure the Atmospheric Boundary Layer (ABL) height. The effort took place in the framework of the first Special Observing Period of the Hydrological cycle of the Mediterranean Experiment (HyMeX-SOP1). Elastic backscatter and rotational Raman signals collected by the Raman lidar system BASIL were used to determine the ABL height and characterize its internal structure. These techniques were compared with co-located measurements from a wind profiler and radiosondes and with ECMWF-ERA5 data. In the effort we consider radiosondes launched in the proximity of the lidar site, as well as radiosondes launched from the closest radiosonde station included in the Integrated Global Radiosonde archive (IGRA). The inter-comparison effort considers data from October 2012. Results reveal a good agreement between the different approaches, with values of the correlation coefficient R2 in the range 0.52 to 0.94. Results clearly reveals that the combined application of different techniques to distinct sensors’ and model datasets allow getting accurate and cross-validated estimates of the ABL height over a variety of weather conditions. Furthermore, correlations between the ABL height and other atmospheric dynamic and thermodynamic variables as CAPE, friction velocity and relative humidity are also assessed to infer possible mutual dependences.

scholarly journals CADEX and beyond: Installation of a new PollyXT site in Dushanbe

2019 ◽  
Vol 99 ◽  
pp. 02010
Author(s):  
Ronny Engelmann ◽  
Julian Hofer ◽  
Abduvosit N. Makhmudov ◽  
Holger Baars ◽  
Karsten Hanbuch ◽  
...  
Keyword(s):  
Asian Dust ◽  
Raman Lidar ◽  
Technical Institute ◽  
Lidar System ◽  
Microphysical Properties ◽  
Source Regions ◽  
Central Asian ◽  
Lidar Measurements ◽  
Academy Of Sciences

During the 18-month Central Asian Dust Experiment we conducted continuous lidar measurements at the Physical Technical Institute of the Academy of Sciences of Tajikistan in Dushanbe between 2015 and 2016. Mineral dust plumes from various source regions have been observed and characterized in terms of their occurrence, and their optical and microphysical properties with the Raman lidar PollyXT. Currently a new container-based lidar system is constructed which will be installed for continuous long-term measurements in Dushanbe.

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