高速芯片冷却风扇智能控制技术

高速芯片作为仪器仪表系统的主要功率元件,工作时通常会产生热量。为避免芯片温度过高导致其性能恶化,需要对芯片采取冷却。通过温度传感器集成电路测量高速芯片温度并智能调节风扇转速,采用PWM技术驱动风扇,并设计合理的风扇电源供电方案,在温度较低时可最大限度降低风扇转速和噪声水平。     

智能帆板控制系统的设计

设计一种基于STC89C52RC单片机的智能帆板控制系统。采用编码器作为角度传感器,通过单片机对辨向电路信号的数据进行处理并实时显示。利用脉宽调制控制技术,通过改变信号的占空比调节风机风速控制角度。运用超声波进行实时测距,根据风机与帆板的距离调整脉宽,步距,使得电机能够迅速准确的驱动帆板达到指定角度。通过实验分析,系统能够实现从0度到60度的帆板角度匀速控制,完成了帆板控制系统的数字输入智能控制,并且能够通过人为设置角度后智能控制程序使得帆板达到要求的角度。     

基于单片机的风扇智能控制器硬件设计

提出一种以单片机AT89C52为核心控制芯片的风扇智能控制器的设计.主要介绍了红外接收电路、过零检测电路和交流电机驱动电路模块的设计.实现了调节风量,定时关机,模拟自然风等功能.系统运行稳定、安全可靠,具有一定的应用推广价值.     

STC单片机智能输液监控报警管理系统的设计

智能输液监控报警管理系统由STC单片机控制系统、LCD1602显示系统、液滴速度检测系统、液位检测系统、步进电机控制电路、温度传感器、加热电路、数据存储系统以及键盘设置和光电报警系统等构成。利用步进电机控制阀门,来控制液体流速。液体流速范围可以设定,同时当液体水位到达警戒位以下时发出报警信号。当液体的温度低时可以对液体进行加热。整个设计过程由电路设计、软件设计、仿真设计等组成。本系统精度高、智能可靠、实用性能高具有很强的推广价值。     

风摆控制实验系统设计

为满足"自动控制原理"实验教学的需要,研发了一套风摆控制实验系统。该系统分为角度检测模块、控制驱动模块、上位机软件3部分。控制驱动模块接收来自角度检测模块的风摆角度信息,与上位机设定的目标角度进行比较,计算出当前的风机驱动量并调节风机风力,将风摆控制到目标位置。该系统提供了一个综合性实验平台,能够灵活地应用于单片机、嵌入式系统、电机控制等课程。     

基于Proteus的步进电机控制系统仿真设计

设计了一种步进电机控制系统,使用C51单片机控制4相步进电机,由单片机产生驱动脉冲信号,通过键盘设定步进电机的步进方向和步进速度,在液晶显示器上显示步进角度、步进方向和步进速度,并通过仿真软件Proteus对系统做了仿真和测试。整个系统采用模块化设计,结构简单可靠。     

基于人脸检测的智能风扇设计

系统以Raspberry Pi 3B+为核心处理器,通过摄像头采集图像进行人脸检测,进而在一定角度内控制风扇的关停和自动跟踪.Raspberry Pi与ESP8266微控制器配合,利用温、湿度传感器实时采集环境温度和湿度,自动调节风扇的转速.同时对摄像头进行远程控制,最终实现智能风扇系统的设计.经过测试,人脸检测准确度较高,能够很好地满足应用要求.     

基于AT89S52单片机的PWM电机控制风扇转速系统

基于AT89S52单片机为核心脉冲宽度调制（PWM）设计电机控制。该系统以帆板为例：通过AT89S52单片机作为中心控制部件;PWM控制直流电机驱动电路;A／D转换及传感器电路角度传感器采集来的模拟信号转换成单片机可识别的数字信号;键盘电路控制直流电机的加减速及控制风扇的风力大小;显示键盘显示帆板实时度数;声光提示电路作为帆板控制系统中的测试电路。完成对风扇转速的控制,调节风力大小,以改变帆板转角的控制功能。     

帆板控制系统的设计与实现

该控制系统采用STM32F103RCT6为主控制器,利用外部按键输入可以调节风扇转速,调节风力大小,进而控制帆板转角,采用PID算法控制电风扇转速．利用SCA61T实现对帆板角度的检测,并在液晶屏上实时显示．测试结果表明控制效果良好．     

基于51单片机的光电型搬运机器人的设计

该设计以STC89C51单片机作控制核心,通过TB6612FNG电机驱动芯片控制电机,配合红外传感器、舵机、颜色识别等元件及供电装置构成智能物料搬运小车.可实现自主循迹且将不同颜色的物块运送到指定位置的目的.     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…