智能牛顿环测量仪设计

Design of intelligent Newton ring measuring instrument

牛顿环等干涉图样的观测和测量是大学物理实验中一个比较重要的实验。针对目前老式牛顿环测量仪存在体积庞大而笨重,耗电大,成本高,不智能化,没有数据处理功能等缺点。我们研制了智能牛顿环测量仪。原理是把行同步信号从视频信号中分离出来,用该同步信号同时触发两个单稳态延时电路,利用两个单稳态延时之差来产生闸门开关,闸门的宽窄来决定脉冲的个数,脉冲的个数与液晶屏测量的距离成比例。改进后的仪器稳定可靠,外观小巧,使用简单。

The observation and measurement of the interference pattern such as Newton ring is an important experiment in college physics experiment.In view of the disadvantages of the old Newton ring measuring instrument,such as bulky volume and heavy,high power consumption,high cost,no intelligence,no data processing function and so on.We have developed an intelligent Newton ring measuring instrument.The principle is to separate the horizontal synchronizing signal from the video,using the synchronizing signal to trigger the two monostable delay circuits at the same time,utilizing the difference of two monostable delay to generated the gate switch,and the width of the gate determines the number of pulses,the number of pulses is proportional to the distance measured by the LCD screen. The improved instrument is stable,reliable,compact and simple to use.