| 摘要 |
<p>The present invention implements a laser gas analysis device capable of measuring, with high accuracy, even hydrocarbon with a small spectral feature at the same time as hydrocarbon with a large spectral feature using a wavelength-variable laser with a wide wavelength-variable width as a laser light source and using a statistical method in which a sharp peak portion of methane is removed in concentration detection. A laser gas analysis device is configured from: a wavelength-variable laser which has a wide wavelength-variable width; a light irradiation means which irradiates gas to be measured with output light from the wavelength-variable laser as measurement light; and a data processing unit which, on the basis of an absorption signal related to the measurement light transmitted through the gas to be measured, finds the absorption spectrum of the gas to be measured and finds the concentration of each component by a statistical method. The laser gas analysis device is characterized in that the data processing unit uses, among absorption spectra obtained by sweeping a relatively wide wavelength range, an absorption spectrum in a wavelength region in which the sharp absorption peaks of other gas components are not present when a component concentration of gas that has no sharp absorption peak is found.</p> |
