摘要
目前红外测温方法难以消除复杂环境下外来辐射的干扰,导致测温精度低,设计了一种高精度的红外测温系统。该系统提出了由宽带滤光片和三级干涉滤光器结合的滤光方法,根据该方法对高温物体发出的近红外光谱进行滤光,将高温背景光和环境干扰光滤掉,得到两个单色光谱,经红外探测器接收获得其辐射功率比,通过计算得出物体温度。该系统透过的单色光谱带宽仅有1nm,将透射光谱以外的背景光辐射和环境光源辐射抑制达8个数量级,降低了因被测对象周围环境升温引起的测温误差,提高测温系统的精度。最后通过实验验证了该测温系统的可行性,精度达0.2%。
At present,the interference from outside radiation under the complex environment is difficult to eliminate by using theinfrared thermometry method.It leads to the low measurement accuracy.In the present paper,a high-precision infrared temper-ature measurement system was designed.The light filter method is presented in this system.The broadband filters and three-level interference filter were combined in this method.According to the method,the near-infrared spectra sent out by high tem-perature object is filtered.The high temperature background light and the environment obtrusive light are filtered out.In thisway,two monochromatic spectra are obtained.The radiation power ratio is received after receiving by the infrared detector.Then the temperature is obtained by calculating.In this system,the bandwidth of monochromatic spectrum permeated is only 1nm.The inhibition of radiation from background light and ambient light except transmittance spectrum is up to 8orders of mag-nitude.The measurement error caused by the ambient temperature heating of the measured object is reduced.The accuracy ofthe temperature measurement system is improved.Finally,the temperature measurement system is feasible according to the ex-periment result.The precision reached to 0.2%.
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2011年第12期3236-3240,共5页
Spectroscopy and Spectral Analysis
基金
国家科技重大专项(2011ZX04002-101)资助
关键词
近红外光谱
红外探测器
宽带滤光片
三级干涉滤光器
Near infrared spectroscopy
Infrared det ector
Broadband filter
Three-level interference filter
