利用热电器件实现发射率及温度的实时测量系统

Accurate Measurement Instrument for Temperature and Emissivity Using Pyroelectric Detector in Real time

介绍了一种采用钽酸锂热释电探测器作为光接收元件、以 80 31单片机为核心实现的中、高温物体发射率及温度实时测量系统。介绍了其工作原理与结构 ,分析了其中的技术难点及相应的解决方法 ,讨论了系统的灵敏度、发射率及温度的测量精度。结果表明 ,对 42 7℃抛光的钢铸件而言 ,系统的最小可鉴别温差为 0 .32 K,发射率的测量精度 σελ=1 .72× 1 0 -2 ,|σελ/ελ| 2 .6% ;温度的测量精度σT=1 .8k,|σT/T| 0 .2 575%。

This paper presents a new kind of the specific radiance and temperature measurement using pyroelectric detector as optical receiving element and using 8031 chip microprocessor.The principle and structure of this instrument are introduced.The key technologies and the corresponding solution methods are analysed.Temperature measurement sensitivity,and measurement accuracy of emissivity and temperature are discussed.To polishing steel cast at 427℃,the results are NETD=0.32K,σ ε λ =1.72×10 -2 ;|σ ε λ /ε|=2.6%;σ T=1.8k;｜σ T/T｜=0.2575%