| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and device for multi-point gas concentration detection in which a light is introduced to multi point gas detecting part without shortening the life of an optical switch. SOLUTION: In the optical gas concentration detection method which irradiates a light from a light source to a plurality of gas detecting parts 8 where gas atmosphere to be measured exists and receives a transmitted light to detect each gas concentrations from the received signals, the light form the light source is sequentially introduced to one of a plurality of branching light paths 4 by a first stage optical switch 5, lights from each branching light paths 4 are sequentially introduced to one of a plurality of individual branching paths 6 by a next stage or later optical switch 7, and then lights from individual branching paths 6 are introduced to each of the gas detecting parts 8. Therefore, the number of switching the optical switches 5 and 7 can be reduced comparing with the number of the gas detecting parts 8. COPYRIGHT: (C)2005,JPO&NCIPI
|
