Directly data processing algorithm for multi-wavelength pyrometer (MWP).
Directly data processing algorithm for multi-wavelength pyrometer (MWP).
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DOI：
10.1364/oe.25.030560
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发表时间：
2017-11
期刊：
影响因子：
3.8
通讯作者：
Jian Xing;Bo Peng;Zhaoqin Ma;Xin Guo;Li Dai;Weihong Gu;Wenlong Song
中科院分区：
文献类型：
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作者：
Jian Xing;Bo Peng;Zhaoqin Ma;Xin Guo;Li Dai;Weihong Gu;Wenlong Song
由于发射率未知，多波长高温计（MWP）的数据处理是一个难题。到目前为止，开发的一些解决方案通常假定发射率与波长或发射率与温度的特定数学关系。由于假设与实际情况存在偏差，会严重影响反演结果。因此不需要预先假设光谱发射率模型的直接MWP数据处理算法是本研究的主要目的。提出了两种不需要预先固定发射率模型的MWP数据处理算法：梯度投影(GP)算法和内部惩罚函数(IPF)算法。新颖的核心思想是将MWP的数据处理问题转化为约束优化问题，然后通过GP或IPF算法来求解。通过对一些典型光谱发射率模型的仿真结果对比发现，IPF算法在精度和效率上均优于GP算法。火箭喷管温度实验结果表明，IPF算法的真实温度反演结果与理论设计温度也吻合较好。因此，所提出的IPF与MWP组合算法有望成为一种直接的数据处理算法，以消除MWP未知发射率的障碍。
Data processing of multi-wavelength pyrometer (MWP) is a difficult problem because unknown emissivity. So far some solutions developed generally assumed particular mathematical relations for emissivity versus wavelength or emissivity versus temperature. Due to the deviation between the hypothesis and actual situation, the inversion results can be seriously affected. So directly data processing algorithm of MWP that does not need to assume the spectral emissivity model in advance is main aim of the study. Two new data processing algorithms of MWP, Gradient Projection (GP) algorithm and Internal Penalty Function (IPF) algorithm, each of which does not require to fix emissivity model in advance, are proposed. The novelty core idea is that data processing problem of MWP is transformed into constraint optimization problem, then it can be solved by GP or IPF algorithms. By comparison of simulation results for some typical spectral emissivity models, it is found that IPF algorithm is superior to GP algorithm in terms of accuracy and efficiency. Rocket nozzle temperature experiment results show that true temperature inversion results from IPF algorithm agree well with the theoretical design temperature as well. So the proposed combination IPF algorithm with MWP is expected to be a directly data processing algorithm to clear up the unknown emissivity obstacle for MWP.