| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a gas concentration measuring method and a measuring apparatus, measuring the gas concentration of gas generated in a sealed vessel such as a boiler, a refuse incinerator, or a combustion chamber of a combustion engine, or that of gas delivered from the sealed vessel to the outside with the usage of a laser light, and effectively measuring the gas concentration of plural kinds of gases with a simple system. <P>SOLUTION: In the gas concentration measuring method for measuring the gas concentration from an absorbed amount of the laser light of the specified wavelength by irradiating a measurement gas atmosphere with the laser light of the specified wavelength, a driving current is alternately switched between adjacent gas absorbing wavelengths in a wavelength sweeping range by the driving current of one laser diode, the laser light corresponding to two kinds of gasses is generated by time dividing from the one laser diode, the generated laser light is respectively irradiated by the same laser beam, and the gas concentration of the two kinds of the gases is calculated from a light receiving signal which is obtained by receiving the irradiated laser light. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
