发明名称 |
Method for laser spectroscopy of gases |
摘要 |
<p>A method of determining a concentration of a gas in a sample and/or the composition of a gas using a spectrometer comprises transmitting of radiation whose wavelength substantially continuously runs through a wavelength range, wherein the continuous running through of the wavelength range is overlaid by a wavelength modulation; measuring of an absorption signal as a function of the wavelength of the radiation; converting of the absorption signal into first and second derivative signals; deriving of a first and a second measured gas concentration value from the first and the second derivative signals, respectively; and determining of the concentration and/or the composition of the gas from at least the first measured gas concentration value, wherein the wavelength modulation is adapted in response to a change of a state variable of the gas such that a ratio between the first and the second measured gas concentration values is kept substantially constant.</p> |
申请公布号 |
EP2803975(B1) |
申请公布日期 |
2015.07.08 |
申请号 |
EP20130168237 |
申请日期 |
2013.05.17 |
申请人 |
SICK AG |
发明人 |
EDLER, JULIAN;BEYER, THOMAS;DISCH, ROLF |
分类号 |
G01N21/35;G01J3/42;G01J3/433;G01N21/27;G01N21/39 |
主分类号 |
G01N21/35 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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