In-Situ Diagnostics of Combustion Parameters Using Laser-Induced Breakdown Spectroscopy

2005 ◽  
Author(s):  
T.-W. Lee ◽  
N. Hegde ◽  
I. Han
Keyword(s):  
Equivalence Ratio ◽  
Flame Temperature ◽  
Laser Induced Breakdown Spectroscopy ◽  
Fuel Composition ◽  
Breakdown Spectroscopy ◽  
Spectral Signal ◽  
Laser Induced Breakdown ◽  
Existing Data ◽  
Good Agreement

Laser-Induced breakdown spectroscopy is a powerful diagnostic method that can be applied to combustion systems for measurements of fuel-air ratios, fuel composition, and temperature. In this study, we specifically show the application of LIBS for in-situ flame temperature measurements at conditions up to moderately sooting conditions (equivalence ratio of 15 for methane-air flames). Comparisons with existing data obtained from thermocouple exhibit excellent agreement in weakly sooting flames and good agreement at higher equivalence ratios. The deviation at higher equivalence ratios is attributed to signal trapping due to soot and precursor species and also due to increase in hydrogen spectral signal at these conditions. These are factors that can be circumvented and do not preclude application of LIBS to highly sooting flames.

In situ classification of rocks using stand-off laser-induced breakdown spectroscopy with a compact spectrometer

2018 ◽  
Vol 33 (3) ◽  
pp. 461-467 ◽  
Author(s):  
W. T. Li ◽  
Y. N. Zhu ◽  
X. Li ◽  
Z. Q. Hao ◽  
L. B. Guo ◽  
...  
Keyword(s):  
High Accuracy ◽  
Remote Detection ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

The ASPI-LDA algorithm combined with a compact spectrometer to achieve high accuracy classification, which has a great potential for field in situ remote detection.

Comprehensive effects of oceanic pressure and temperature on in-situ LIBS signals

2021 ◽  
Author(s):  
Nan Li ◽  
Jinjia Guo ◽  
Jiaojian Song ◽  
Wangquan Ye ◽  
Yuan Lu ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Deep Sea ◽  
Chemical Sensor ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Marine Environmental

Laser-induced breakdown spectroscopy (LIBS) has been successfully developed into the oceanic chemical sensor for deep-sea exploration. However, the LIBS signals will be affected by marine environmental factors, and this effect...

Accurate quantitative determination of heavy metals in oily soil by laser induced breakdown spectroscopy (LIBS) combined with interval partial least squares (IPLS)

2019 ◽  
Vol 11 (29) ◽  
pp. 3657-3664 ◽  
Author(s):  
Yu Ding ◽  
Guiyu Xia ◽  
Huiwen Ji ◽  
Xiong Xiong
Keyword(s):  
Heavy Metals ◽  
Rapid Detection ◽  
Detection Method ◽  
Pollution Assessment ◽  
Laser Induced Breakdown Spectroscopy ◽  
Oily Soil ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

A rapid detection method for heavy metals in oily soil is needed to provide accurate data support for in situ soil pollution assessment and restoration.

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