自研透射式能见度测量系统性能分析

从系统测量原理、组成结构、计算过程及测量效果等方面介绍了一种自行研制的透射式能见度测量系统。该系统使用白色LED光源,实现发散角为1mrad的平行光路;利用积分球进行分光监控以补偿光能量变化;使用非球面镜实现全光斑接收。系统与积分浊度计在2～10km量程内能见度测试误差小于10%。从透射式能见度测量原理与计算过程,分析了影响系统测量性能的因素。结果显示定标准确性、测量线性度与系统稳定性是影响系统测量性能的主要因素,同时给出了该系统的定标准确性、测量线性度与系统稳定性的评估方法及评估数据,验证了该系统的测量性能。

Performance Analysis of Self Developed Transmission Visibility System

A self developed transmission system is introduced from three aspects: measuring principles, composition structure and calculation procedures. The white LED light source is used in this system, and its divergence angle is about 1 mrad. Variation of the light source is compensated by the integrating sphere, which can split the beam. The full facula is received by the aspherical mirror. The relative deviation between the transmission system and the nephelometer is less than 10% from the 2 km to 10 km. Influencing factors of measurement performance are analyzed from measuring principles and calculation procedures. The results show that the main factors affecting the measurement performance of the system are the accuracy of the standard, the linearity of measurement, and the stability of the system. At the same time, the assessment methods and the data of calibration accuracy, measurement linearity, and system stability are given, which verify the measurement performance of the system.