Fu Tairan, Tan Peng, Pang Chuanhe, Zhao Huan, Shen Yi
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Thermal Engineering, Tsinghua University, Beijing 100084, People's Republic of China.
Rev Sci Instrum. 2011 Jun;82(6):064902. doi: 10.1063/1.3596567.
A fast fiber-optic multi-wavelength pyrometer was developed for the ultraviolet-visible-near infrared spectra from 200 nm to 1700 nm using a CCD detector and an InGaAs detector. The pyrometer system conveniently and quickly provides the sufficient choices of multiple measurement wavelengths using optical diffraction, which avoids the use of narrow-band filters. Flexible optical fibers are used to transmit the radiation so the pyrometer can be used for temperature measurements in harsh environments. The setup and calibrations (wavelength calibration, nonlinearity calibration, and radiation response calibration) of this pyrometer system were described. Development of the multi-wavelength pyrometer involved optimization of the bandwidth and temperature discrimination of the multiple spectra data. The analysis results showed that the wavelength intervals, Δλ(CCD) = 30 nm and Δλ(InGaAs) = 50 nm, are the suitable choices as a tradeoff between the simple emissivity model assumption and the multiple signal discrimination. The temperature discrimination was also quantificationally evaluated for various wavelengths and temperatures. The measurement performance of the fiber-optic multi-wavelength pyrometer was partially verified through measurements with a high-temperature blackbody and actual hot metals. This multi-wavelength pyrometer can be used for remote high-temperature measurements.
利用电荷耦合器件（CCD）探测器和铟镓砷（InGaAs）探测器，开发了一种快速光纤多波长高温计，用于200纳米至1700纳米的紫外-可见-近红外光谱。该高温计系统利用光学衍射方便快捷地提供多种测量波长的充足选择，避免了使用窄带滤光片。使用柔性光纤传输辐射，因此该高温计可用于恶劣环境下的温度测量。描述了该高温计系统的设置和校准（波长校准、非线性校准和辐射响应校准）。多波长高温计的开发涉及对多个光谱数据的带宽和温度分辨率进行优化。分析结果表明，波长间隔Δλ（CCD） = 30纳米和Δλ（InGaAs） = 50纳米是在简单发射率模型假设和多信号分辨之间进行权衡的合适选择。还对不同波长和温度下的温度分辨率进行了定量评估。通过使用高温黑体和实际热金属进行测量，部分验证了光纤多波长高温计的测量性能。这种多波长高温计可用于远程高温测量。
