摘要
为满足红外耳温计现场校准和量值比对的需求,研制了30~42℃便携前置反射罩不锈钢-氨热管黑体辐射源。黑体辐射源空腔为圆柱双圆锥形,空腔深为272 mm,内径为60 mm,锥顶角为120°;口部安装紫铜镀金反射罩,反射罩光阑开口直径为20mm,张角为100°,内表面喷涂发射率为0.95的黑漆;利用基于Monte Carlo法的STEEP321NIM计算软件,计算出的空腔口平面0°到100°出射角内的有效发射率均优于0.999。温度控制系统由PID调节器、高稳定精密铂电阻、直流电源和双金属限温开关等组成,实现了黑体辐射源温度控制的高可靠性。实验测量的黑体辐射源温度稳定性优于0.002℃/20 min,空腔测温管内均匀性优于0.03℃。
A （30-42） ℃ portable ammonia stainless steel heatpipe blackbody source with a front reflector is developed for on site radiance temperature calibration and value dissemination of infrared ear ther- mometers. The cavity of the blackbody source is made from an isotherm ammonia heatpipe. The cylindri- cal double-cone blackbody source cavity is designed with 60 mm in diameter and 272 mm in depth. The bottom cone apex angle of the cylindrical double cone cavity is 120~. The aperture of the copper front re- flector with a 100~ field angle is 20 mm. The cavity is paint-coated with an emissivity of 0. 95. The STEEP321NIM software based on Monte Carlo method is used to calculate the average plane radiation angle cavity emissivity of the ammonia stainless steel heat pipe blackbody source. The calculated effective emissivities of cavity aperture plane from 0° to 100° radiation angle are better than 0. 999. The PID tem- perature control system consists of a PID regulator, highly stable precision platinum resistance thermom- eter,a I7）C power supply, and a bimetal temperature switch. The blackbody source temperature control enables high reliability. The temperature stability of the blackbody source is 0.002 ℃ within 20 min and the temperature uniformity of the cavity is 0.03 ℃.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2015年第5期852-856,共5页
Journal of Optoelectronics·Laser
关键词
黑体辐射源
氨热管
反射罩
耳温计校准
blackbody source
ammonia heatpipe
reflector
ear thermometer calibration
