| 摘要 |
<p>PURPOSE:To analyze analytic gas in the same state as that in the space of a blast furnace, etc., by forming a gas reservoir part which can be open to the outside, arranging a light source and a photodetecting means opposite each other across it, and providing a photodetection waveguide and a reference gas guide-out path and a reference gas guide passage. CONSTITUTION:Reference gas is admitted into the gas reservoir part 3 through a gas intake pipe 5a and a hollow part 5 while a communication part 12 is open after a probe is inserted into the furnace. Far infrared light which is emitted by a far infrared ray emitting body; 6 and transmitted through the reference gas is converged as reference light by a lens 7 for far infrared light and its photodetection output is inputted to a photodetection output processor through a fiber 10 for far infrared light to measure the radiation intensity spectrum of the reference light.Then, the admittance of the reference gas is stopped and the reference gas remaining in the gas reservoir part 3 is sucked through the hollow part 5 to admit in-furnace gas into the gas reservoir part 3. The fiber 10 is pushed to close the communication part 12 with the lens 7. The far infrared light which is emitted by the emitting body 6 and transmitted through the in-furnace gas on condition that the in-furnace gas becomes stable in the gas reservoir part 3 is inputted to the photodetection output processor as sampling light to measure the radiation intensity spectrum.</p> |
