Lissajou图形观察法检测信号的理论依据  

Theory Basis of Testing Signals by Lissajou Pattern Observation Method

作　　者：刘春霞[1] 万秋华[2] 李葆勇[2] 赵长海[2] 丁林辉[2] 

机构地区：[1]黑龙江大学物理科学与技术学院,哈尔滨150080 [2]中国科学院长春光学精密机械与物理研究所,长春130033

出　　处：《电子器件》2007年第3期1018-1020,共3页Chinese Journal of Electron Devices

摘　　要：示波器的Lissajou图形,广泛应用于信号幅值、频率及相位的测量.但是,长期以来所应用的检测规律都是工作经验的积累,没有一定的理论依据.以圆光栅产生的莫尔条纹信号检测为例,从理论上分析了Lissajou图形向径偏差与信号波形参数之间的关系,并且对各种参数偏离情况进行了图形仿真,分析结果与以往经验相符合,为信号检测提供了理论依据,同时指出Lissajou图形观察法的一些不足.The Lissajou graphs of oscillograph have been applied in the testing field of signal amplitude, frequency and phase. However, the detection laws used previously were founded on the working experience without certain theory base. Taking the detection of Moire fringe signals as an example, we analyze the relation between the vector difference of Lissajou graphs and parameters of wave shape of signals, and simulate the deviation of various parameters. The analytical results agree with the experimental ones, and present the basis for signal detection. The shortcoming of Lissajou pattern observation method is pointed out.

关 键 词：信号检测 Lissajou图形 计算机仿真 向径偏差 莫尔条纹 

分 类 号：TM930.11[电气工程—电力电子与电力传动] TM935.3