| Autor: |
Tomohiko Ushiki, Ryota Imazawa, Hidetoshi Murakami, Kosuke Shimizu, Tatsuo Sugie, Takaki Hatae |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
The Review of scientific instruments. 93(8) |
| ISSN: |
1089-7623 |
| Popis: |
A new temperature measurement method—the dual two-color method—was developed to accurately measure the temperature over an ultra-wide temperature range (200–3600 °C) for ITER divertor infrared thermography. This novel method introduces a third wavelength filter to the conventional two-color method by replacing the shorter single wavelength bandpass filter with a customized dual-bandpass filter having two transmission bands, without having to add a third infrared camera. The dominant wavelength band of the total radiance through the dual-band filter changes automatically as the temperature increases and, consequently, either the shorter or longer wavelength band of the dual-bandpass filter is used to establish the two-color combination at both low and high temperatures. The dual two-color method increased the acceptable measurement error of the two-color radiance ratio for the temperature measurement requirement of the ITER divertor infrared thermography to 9.45% from that of 4.3% when using the conventional two-color method. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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