| 发明名称 |
Method for measuring the concentration of a gas component in a measuring gas |
| 摘要 |
A method for measuring the concentration of a gas component in a measuring gas. An absorption line of the gas component is varied as a function of the wavelength of the light of a wavelength-tunable light source within a periodically sequential scanning interval. The absorption line of the gas component is modulated with a frequency (f0) Modulated light is guided through the measuring gas onto a detector. A measurement signal generated by the detector is demodulated upon determining a harmonic (nf0) of the frequency (f0). A measurement result is produced by fitting a setpoint curve to the profile of the demodulated measurement signal. Both demodulated measurement signal and setpoint cure are filtered with the aid of the same filter function. The filter function is operative to suppress noise signal components of the demodulated measurement signal that disturb both signal components of the demodulated measurement signal and the setpoint curve. |
| 申请公布号 |
US2015204779(A1) |
申请公布日期 |
2015.07.23 |
| 申请号 |
US201514601729 |
申请日期 |
2015.01.21 |
| 申请人 |
Siemens Aktiengesellschaft |
发明人 |
Bitter Ralf;Hankiewicz Thomas;Marquardt Christoph Wolfgang;Mucha Adrian;Nygren Jan;Pleban Kai-Uwe;Steinbacher Franz |
| 分类号 |
G01N21/39;G01N33/00 |
主分类号 |
G01N21/39 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for measuring the concentration of a gas component in a measuring gas by a gas analyzer, the method comprising:
varying an absorption line of the gas component as a function of the wavelength of the light of a wavelength-tunable light source within a periodically sequential scanning interval; modulating the absorption line of the gas component with a frequency (f0); guiding the modulated light (through the measuring gas onto a detector; demodulating a measurement signal generated by the detector upon determining a harmonic (nf0) of the frequency (f0); and producing a measurement result by fitting a setpoint curve to the profile of the demodulated measurement signal, wherein: both the demodulated measurement signal and the setpoint curve are filtered with the aid of the same filter function, the filter function being operative to suppress noise signal components of the demodulated measurement signal that disturb both signal components of the demodulated measurement signal and the setpoint curve. |
| 地址 |
Muenchen DE |
