摘要
LabVIEW是虚拟仪器中的一种图形化编程语言 ,不但能够完成一半的数学运算与逻辑运算和输入输出功能 ,还带有专门用于数据采集和仪器控制的库函数和开发工具 ,以及专业的数学分析程序包 ,基本上可以满足复杂的工程计算和分析要求。由电网电压波动引起的照明灯光闪烁现象 ,即闪变 ,给人们的日常工作和生活带来了许多不便。为了统一国际上闪变测试方法与评价标准 ,国际电工委员会 (IEC)制定了闪变仪的测试功能和设计规范。采用低级通用的运算模式 ,分析了IEC闪变仪灯 眼 脑环节各部分的输入输出信号。根据IEC制定的闪变仪的设计规则 ,利用LabVIEW建立了数字式闪变仪灯 眼 脑环节的模型 ,使之能对电压数字信号进行分析处理 ,得到电压瞬时闪变视感度。仿真结果验证了用灯 眼 脑传递函数形式来逼近视感度系数 ,能够得到正确的结果。
LabVIEW is a graphic program language of virtual instrument. It can accomplish half of mathematical operation and Boolean calculation, and has the in-out function. It also has expert function and development tool used in the data collection and instrument control. Especially, it has a professional procedure package for mathematical analysis, which can meet the requirement of complicated calculation and analyzing of project. The voltage fluctuation introduced the glitter of lighting (the light flickering), and this glitter is called flicker which causes much uneasiness to daily work and life. For the sake of unifying the international test method and estimation standard of flicker, the IEC established the test function and design criterion of flicker meter. In this paper, the input and output signal of the segment of light─eye─brain is analyzed by common operation pattern. Basing on the flicker meter design regulations published by the International Electro-technical Commission (IEC) , this paper makes use of virtual instrument ── LabVIEW, to set up a model of IEC flicker meter. This model can analyze and process the voltage digital signal and receive the instantaneous flicker sensation level. The simulation result proves that correct results can be obtained with the instantaneous flicker sensation level coefficient approximated by light-eye-brain transfer function.
出处
《电子工程师》
2005年第2期10-13,共4页
Electronic Engineer
