Zhang Yuzhong, Zhang Wuqiong, Dong Zhe, Shu Shuangbao, Dong Jingtao, Xing Chenyao
School of Instrument Science and Opto-Electronics Engineering, Hefei University of Technology, Hefei 230009, Anhui, China.
Rev Sci Instrum. 2020 Jun 1;91(6):064904. doi: 10.1063/1.5129758.
Commercial charge-coupled device (CCD) cameras are used widely in industrial applications. This paper uses a commercial CCD camera to develop a spectral band CCD-based pyrometer. To improve the calibration accuracy, a thermometry model based on the extended effective wavelength is introduced to describe the pyrometer. The Tikhonov regularization method is employed to acquire the stabilized solutions for the model parameters considering their sensitivities to the perturbations in the calibration data. Therefore, the relationships between the temperature measurement performances and the system parameters, namely, the electron gain and F-number, are analyzed in terms of the temperature measurement range and sensitivity. Meanwhile, the error and uniformity of the temperature measurements are also investigated using a blackbody furnace. The experimental results show that the temperature measurement range for the designed pyrometer is 800-1203 °C, in which the sensitivity is 0.4906-35.64 °C and the average relative error and non-uniformity of the temperature measurements are 2.5‰ and 1.36%, respectively.
商用电荷耦合器件（CCD）相机在工业应用中得到广泛使用。本文使用商用CCD相机开发了一种基于光谱带CCD的高温计。为提高校准精度，引入了基于扩展有效波长的测温模型来描述该高温计。考虑到模型参数对校准数据扰动的敏感性，采用蒂霍诺夫正则化方法来获取模型参数的稳定解。因此，从温度测量范围和灵敏度方面分析了温度测量性能与系统参数（即电子增益和F数）之间的关系。同时，还使用黑体炉研究了温度测量的误差和均匀性。实验结果表明，所设计高温计的温度测量范围为800 - 1203℃，其中灵敏度为0.4906 - 35.64℃，温度测量的平均相对误差和不均匀性分别为2.5‰和1.36%。
