| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable gas concentrations to be measured simply and accurately. <P>SOLUTION: A gas concentration measuring device comprising an LD module that irradiates exhaust gas containing an object gas to be measured with a laser beam while varying the wavelength of the beam, a photodiode that receives the laser beam transmitted by the exhaust gas, and a measuring unit that generates a gas absorption spectrum waveform on the basis of a light reception signal representing the laser beam received by the photodiode integrates signal intensities within a prescribed wavelength range in the gas absorption spectrum waveform generated by the measuring unit with reference to the absorption wavelength at which the object gas is absorbed by the laser beam, and calculates the concentration of the object gas on the basis of the integrated value obtained. <P>COPYRIGHT: (C)2012,JPO&INPIT |
