4.衰减.10图3-7声压在不同距离下的衰减特性105.声压特性10图3-8超声波传感器的声压图，.116.灵敏度特性图3-9超声波传感器灵敏度示意图117.辐射特性….113.3.5测距分析..12图3-11探测距离原理图....

摘要本文所选用的控制模块核心部分为STC89C52单片机，并以此为基础控制元件并添加了其他模块，最终组成一个水位检测装置。在本次设计的水位监测系统中，单片机与压力传感器模块以及扬声器等其他...

Design and implementation of smart fanintelligent IOT Major Class 1 Li ZihengInstructor:Li JizhongAbstract:Summer is coming,we will encounter such a situation.When lying inbed read...

ABSTRACTRadio frequency identification(RFID)is the abbreviation of radio frequencyidentification.The principle of this method is non-contact data communication betweenreader and ta...

学生诚信承诺书我承诺所呈交的毕业设计是本人在指导教师的指导下，按照学校和学院的有关规定，独立研究完成的。本人在毕业设计写作过程中恪守学术道德和学术规范，论文中凡引用他人已经发表或未...

基于单片机的电厂反渗透水处理设备控制系统的设计/原理图--模板.dwg基于单片机的电厂反渗透水处理设备控制系统的设计/基于单片机的电厂反渗透水处理设备控制系统设计开题报告.docx基于单片机的...

准阴师范学院毕业设计Abstract This paper presents a multi-function vision protector based on single -chipmicrocomputer.The hardware circuit and software design of 89C51 single chip ...

毕业设计说明书（论文）英文摘要TitleMulti parameter detection system for home environment-Software DesignAbstractNowadays,people pursue high-quality indoor environment,such as stora...

AbstractAiming at the phenomenon of that the drunk driving causes traffic accidents frequently,designed a controlling system to prevent drunk driving.By doing this the potentialcon...

2