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时间:2020-04-08
《单片机项目--基于51单片机地超声波测距仪地设计.doc》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、V摘要由于本课程是开放性的课程,很多东西靠我们自己去查资料进行了解,在实验的过程中我们遇到过很多的问题,实验经过多次繁琐的调试,才能达到预期的效果。同时我们也是在解决问题的过程中学到了许多平常接触不到的知识,了解和掌握了很多的调试方法和技巧。通过本次实验,初步认识了超声波将在测距仪中的应用越来越广。但就目前技术水平来说,人们可以具体利用的测距技术还十分有限,因此,这是一个正在蓬勃发展而又有无限前景的技术及产业领域,超声波测距仪作为一种新型的非常重要有用的工具在各方面都将有很大的发展空间,它将朝着更加高定位高精度的方向发展,以满
2、足日益发展的社会需求,无庸置疑,未来的超声波测距仪将与自动化智能化接轨,与其他的测距仪集成和融合,形成多测距仪。在具体的制作过程中我们发现现在书本上的知识与实际的应用存在着的差距,书本上的知识很多都是理想化后的结论,忽略了很多实际的因素,或者涉及的不全面,可在实际的应用时这些是不能被忽略的,我们不得不考虑这方的问题。同时我们在老师的引导下加深了对专业知识的认识与应用,了解如何对成果的分析与总结,出现的问题该从什么地方入手,如何检查,如何解决。培养了我们要勇于思考,善于思考的能力。而分组进行团队实验,既利于激发同学们的参与热情,
3、也有利于促进学员间相互了解、认识,为培养团队协作能力的建立打下基础;为今后同学们进行的工作做好一定的基础。V目录引言·························································11.超声波测距仪的设计思路··············································21.1超声波测距原理·····································21.2超声波测距仪原理框图·····························
4、········22.系统的方案设计与论证·············································32.1总体设计方案···········································32.2系统整体方案的论证·········································32.2.1基于单片机的超声波测距系统······························32.2.2基于CPLD的超声波测距系统························
5、·33系统的硬件结构V设计·················································43.1发射电路的设计··········································43.2接收电路的设计···········································53.3显示模块的设计···········································64系统软件的设计··································
6、·······84.1软件的设计的方案········································84.2软件的设计流程图········································85系统硬件的调试·········································96总结··············································117参考文献V·············································13
7、附录一超声波测距程序清单··································14附录二实物图与原理图对照······························21V引言由于超声波指向性强,能量消耗缓慢,在介质中传播的距离较远,因而超声波经常用于距离的测量,如测距仪和物位测量仪等都可以通过超声波来实现。超声波简单的说就是音频超过了人类耳朵所能够听到的范围。一般而言是指声音超过了20KHz时称之为超声波。与光波不同,超声波是一种弹性机械波,它可以在气体、液体和固体中传播。因为电磁波的传播速度为m/s,而超声波
8、在空气中的传播速度为340m/s,其速度相对电磁波是非常慢的。利用超声波检测往往比较迅速、方便、计算简单、易于做到实时控制,并且在测量精度方面能达到工业实用的要求。超声波测距在某些场合有着显著的优点,因为这种方法是利用计算超声波在被测物体和超声波探头之间的传输来测量距离的,因
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