| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas analysis device with which it is possible to create an accurate intensity change I(ν) when calculating the amount of a specific gas in the gas to be measured in a combustion chamber.SOLUTION: Provided is a gas analysis device 1 including an arithmetic unit 41f for calculating the amount of a specific gas in the gas to be measured, the gas analysis device 1 further including an area value calculation unit 41d for calculating specific gas absorption peak area values D, D, etc., in the intensity changes I(ν), I(ν), etc., of measurement light in a prescribed wavelength range on each cycle after an air intake step on an m'th cycle, and a representative reference line creation unit 41e for creating a representative light intensity change I'(ν) on the m'th cycle on the basis of the area values D, D, etc., the arithmetic unit 41f detecting, in a compression step on the m'th cycle or on the (n+a)'th cycle of a combustion step, the absorption peak of the specific gas on the (n+a)'th cycle by using the intensity change I(ν) of measurement light in a prescribed wavelength range on the (n+a)'th cycle and the representative light intensity change I'(ν).SELECTED DRAWING: Figure 1 |
