摘要
针对大型热态锻件在锻造过程中表面有较厚的氧化皮包裹,导致测温数据存在较大的误差,提出了一种基于红外光谱的测温方法,能有效的消除氧化皮层对测温的影响。该方法通过接收锻件氧化皮表面辐射的红外光谱直接测量氧化皮表面的温度和发射率,然后利用热交换公式推导求出被氧化皮覆盖的热态锻件真实温度。为了更好的抑制接收的红外光谱中各种干扰光谱的透过,提出了三级干涉滤光系统,并利用光谱仿真获得一组最优间隙参数值,提高了测温精度。实验结果表明,该测温方法能够准确测出覆盖有氧化皮高温锻件表面的温度,满足测温精度要求,验证了该测温方法的可行性。
High temperature large forging is covered with a thick oxide during forging.It leads to a big measurement data error.In this paper,a method of measuring temperature based on infrared spectroscopy is presented.It can effectively eliminate the influence of surface oxide on the measurement of temperature.The method can measure the surface temperature and emissivity of the oxide directly using the infrared spectrum.The infrared spectrum is radiated from surface oxide of forging.Then it can derive the real temperature of hot forging covered with the oxide using the heat exchange equation.In order to greatly restrain interference spectroscopy through included in the received infrared radiation spectrum,three interference filter system was proposed,and a group of optimal gap parameter values using spectral simulation were obtained.The precision of temperature measurement was improved.The experimental results show that the method can accurately measure the surface temperature of high temperature forging covered with oxide.It meets the requirements of measurement accuracy,and the temperature measurement method is feasible according to the experiment result.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2012年第5期1241-1246,共6页
Spectroscopy and Spectral Analysis
基金
国家科技重大专项(2011ZX04002-101)资助
关键词
红外光谱
氧化皮
发射率
三级干涉滤光器
Infrared spectroscopy
Surface oxide
Emissivity
Three-level interference filter
