| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensive soot concentration measuring device simplified in measurement. SOLUTION: This device is equipped with a light source 2 for making measuring light I incident to sample gas G; a first scattered light photodetector 3θ1 for detecting the intensity of scattered light at a first angleθ1 generated in the sample gas G; a second scattered light photodetector 3θ2 for detecting the intensity of scattered light at a second angleθ2 generated in the sample gas G; and a computing unit 4 for operating a soot dimension in the sample gas G by substituting the first scattered light intensity and the second scattered light intensity detected by the first scattered light photodetector 3θ1 and the second scattered light photodetector 3θ2 for a dimension proportional formula for determining the soot dimension from the ratio of the first scattered light intensity to the second scattered light intensity, and operating a soot concentration in the sample gas G by substituting the scattered light intensity detected by the photodetector for a concentration proportional formula for determining the soot concentration from the first scattered light intensity or the second scattered light intensity. COPYRIGHT: (C)2010,JPO&INPIT
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