A comparison study on temperature measurement precision between middlewave 3~5 μm and longwave 8~12 μm measuring thermal imaging systems has been conducted.The study is limited to indoor condition and the target′s temperature is within the range of 270~900 K.Firstly,the Disturb Resisting Function(DRF)of infrared systems is deduced.From the DRF curve,we find that the middlewave infrared system suffers smaller impact than the longwave system under the same degree of disturbance.It has been developed a theory about the influence of target′s physical characteristic and measurement conditions on the accuracy of temperature measurement.On the basis of the developed formulas,it has been made an analysis of the influence of signal disturbances(because of incorrectly assumed emissivity,limited transmittance of the atmosphere,radiation reflected by the object and shift of optics radiation)on the accuracy of temperature measurement.It has been found that the middlewave systems in typical temperature range offer better accuracy than the longwave systems do.
参考文献
相似文献
引证文献
引用本文
孙志远,赵楠.中、长波热红外系统辐射测温精度比较[J].激光与红外,2013,43(1):38~43 SUN Zhi-yuan, ZHAO Nan. Comparison of radiation temperature measurement precision between middlewave and longwave thermal-imaging systems[J]. LASER & INFRARED,2013,43(1):38~43