基于单片机的非接触数显超重、失重实验仪的设计

An Experimental Instrument of Overweight and Weightlessness with Non-contact Numbers Design Based on Single Chip

针对喷泉法、链条法、斜面小车法等物体超重、失重的演示方法中存在的较大的加速度,超重、失重现象明显与加速度大演示时间短,教室里绝大多数学生根本来不及观察演示现象之间的矛盾,研制开发一种利用单片机把实验结果保留下来的非接触数显超重、失重实验仪。该实验仪以AT89C52单片机为核心,分光电门检测、数码管显示、按键等硬件电路模块。对该实验仪的系统硬件设计、工作原理做了详细介绍,同时给出了单片机各口线作用定义及软件编程。实际应用表明,该实验仪具有全自动、操作简便、非接触、实验现象可靠、显示清晰明了的特点。

There exists great accelerations in the demonstrations of object overweight and weightlessness according to the fountain method,chain method and bevel larry method. The phenomenon of overweight and weightlessness is obvious, the acceleration is big and the demonstration time is short so that most students in the classroom can＇t see it very clearly. So it is important to design and develop an instrument which can show and keep the result about the experiment by using the single chip Computer. This instrument is based on AT89C52. It divides into several modules such as photoelectric detection, led display and control keys. This article introduces the system hardware design, work principles in detail. It also gives definitions to each interface line and software programming. The practical application shows that this experimental instrument has such characteristics as full - automatic, easily operated, non - contact, reliable, clear and obvious.