Ushiki Tomohiko, Imazawa Ryota, Murakami Hidetoshi, Shimizu Kosuke, Sugie Tatsuo, Hatae Takaki
National Institutes for Quantum Science and Technology, Naka, Ibaraki, Japan.
NAT Corporation, Naka, Ibaraki, Japan.
Rev Sci Instrum. 2022 Aug 1;93(8):084905. doi: 10.1063/5.0089269.
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.
一种新的温度测量方法——双双色法被开发出来，用于准确测量国际热核聚变实验堆（ITER）偏滤器红外热成像在超宽温度范围（200 - 3600°C）内的温度。这种新颖的方法通过用具有两个透射带的定制双带通滤波器取代较短的单波长带通滤波器，在不增加第三个红外相机的情况下，向传统双色法引入了第三个波长滤波器。通过双波段滤波器的总辐射的主导波长带随着温度升高而自动变化，因此，双带通滤波器的较短或较长波长带被用于在低温和高温下建立双色组合。双双色法将ITER偏滤器红外热成像温度测量要求下双色辐射比的可接受测量误差从使用传统双色法时的4.3%提高到了9.45%。
