| 摘要 |
Fiber-optical gas sensor is intended for measurement of concentrations of most widespread air pollutant gases (CO, CO, CH, NO) through application of fiber-optical communication lines and measurement with BIZPIN device that transforms change of intensity of radiation to frequency of electric signal, of infrared radiation. By method of differential measurement of gas concentration one determines partial pressure (concentration) of gas in air mix through measurement of intensity of radiation flux with wavelength that corresponds to spectral line of absorption for gas and radiation flux with wavelength that is out of limits of range of spectral absorption of gas (thus out of line of transparency for gas) that go from source of infrared radiation by two-line fiber-optical cable through measuring cuvette (channel) with gas being analyzed this has one metal spherical mirror. |
