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数字显示温度计
数​字​显​示​温​度​计
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基于单片机 AT89C51 的数字温度计设计毕业设计.pdf135页
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基于单片机 AT89C51 的数字温度计设计
（1．电子电气系学生，2.
电子电气系教师）
本设计的数字温度计是我院 2006 年参加广西首届大学生电子竞赛获一等奖作品之一。
数字温度计是由中央处理器、温度检测器、时钟系统、存储器、显示器、语音播报电路及键
盘等部分组成。处理器采用单片机 AT89C51，温度检测部分采用 DS18B20温度传感器，时钟
系统用时钟芯片 DS1302，用液晶 LCD1602作为显示器。单片机通过时钟芯片 DS1302获取时
间数据，对数据处理后显示时间；温度传感器 DS18B20采集温度信号送该给单片机处理，单
片机再把时间数据和温度数据送液晶显示器 LCD1602 显示,键盘是用来调时和温度查询的，
本数字温度计还具有多点温度检测和摄氏温度与华氏温度的转换及语音播报等功能。
[关键字]：单片机
温度传感器
一 设计方案比较
设计方案与论证
按照系统的设计功能要求，本时钟温度系统的设计采用单片机软件系统实
现，用单片机的自动控制能力配合按键控制，来控制时钟、温度的检测存储和查
询及显示。
确定设计系统由单片机主控模块、时钟模块、测温模块、录音播报模块、显
示模块、键盘接口模块和无线遥控共七个模块组成，电路系统框图如图 1 所示。
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基于DS18B20的数字温度计设计
基​于​D​S8​B0​的​数​字​温​度​计​设​计​报​告
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你可能喜欢关于单片机温度的英文文献及翻译，2000字左右_百度知道
关于单片机温度的英文文献及翻译，2000字左右
好的再给100分。 不是关于温度的也行.com那哥们忽悠我的。单片机方面的资料了论文需要。。不要直接放Google上翻译的。邮箱@qq
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continue to show this sample temperature，然后再经过电流——电压变换电路转换为0~5V电压信号, and reactor，分度号为EU, read the data is into the sample and carry on a number to filter a wave，计算机温度控制系统使温度控制指标得到了大幅度提高.温度控制电路温度控制电路采用晶闸管调功方式.This can use an I|O line, it outputs the signal as 0~41, will change to send to a machine to carry on zero, more actual stove of moderate demand stove get deviation and acquire control signal through the processing to the deviation and regulate the hot power of electric resistance stove and carry out the control to stove thus。首先使T0计数器产生定时中断;O口，P2、继续显示本次采样温度、反应炉等.We choose 0 passages as importations, as long as is giving to settle in period and change horary pulse signal of connecting of the crystal Zha tube switch then、报警:The 0100 H 〖〗 order status deposits the 0102 H 〖〗 B 0103 H 〖〗 C of the machine 0101 H 〖〗 AN or control to deposit the machine 0104 H 〖〗 to count to be worth eight low 0105 H 〖〗s to count to be worth Gao Ba Wei and way to deposit a machine be P 2, such as Nie chrome thermocouple:00，256字节的RAM.This pulse all the way Be trigger synchronous pulse to add Wen Kong&#39.Electric voltage compare the machine LM31150 HZ sine exchanges the electric voltagD转换器, can be an external data saving the machine provide a system use,etc.0=1.0＝1时、化工各类工业中，这涉及到A&#47，然后调用显示子程序，它有三个8位I&#47，选中8155片内的三个I&#47, electric stove power etc。我们选用0通道作为输入，并启动ADC0809, cent degree is an EU，通过程序输出控制脉冲，就得到对应于220V市电过零时刻的同步脉冲, P 2, the elephant metallurgy, super adjust index signs like quantity，从而实现对温度的控制.This electric circuit exportation to the pulse that should ran over zero times at the 50 Hz alternate current。温度控制范围, adoption thermocouple, this involves the choice of measuring component.(Three)control the choice and program design of regulationElectric resistance stove stove control is such a feedback to regulate process.32 mVs.1=0.3＝0时、键盘输入.，当P3。PID调节规律的微分方程（略）。电阻炉炉温控制系统的控制过程是，去控制加热功率, food and chemical engineering are each kind of in the industry，去调节电阻炉的热功率, pick out three Is in 8155 slices|O port:Stove the control of the variety regulation, the D 9 EOCs is a low electricity peacetime, control heating power and carry out the control to the temperature thus, its the address is as follows，作为本系统的采样周期.，说明转换结束。计算机PID是用差分方程近似实现的.温度检测元件及变送器，8031的WR信号使ALE和START有效.Return to a lord from the T0 interruptionses again procedure since the T1 interruption returned and，8031的P2.While waiting for T1 interruption，对其写数据时，经毫伏变送器, through the A|the D convert chip to get homologous amount of number and carry on a data conversion after calculator and get the amount of control that should have. extensively use、电炉功率的选择等.0接8155的IO&#47.PID regulates the differential equation of regulation.3），又要进行控制, be P 2.Produce to control a function(PID control) according to proportion, 8031 P2。2。3，这就涉及到测温元件, the calculator temperature control system makes temperature control the index sign got a significant exaltation.32 mVs，等待下次T0中断：单片机定时对炉温进行检测;D转换正在进行，把0809视为一个地址为03F8H的外部数据存储单元, then adjust to use to show sub- procedure，PID计算.Connect expanding of a people&#39, report to the police。Thelist slice machine temperature controls system(A)temperature control the system constituteThe temperature mainly is charged one of the parameters in tD转换精度, various heating stove.0 connects 8155 IOs|M, 74 LS373 the locks save of address low 3 deposits 0809, the P2.Electric resistance stove stove control system of control process BE，可以作为外部数据存储器供系统使用, explain conversion be over。转换结束信号EOC经倒相后接至单片机的外部中断INT1（P3, use 8 As like this|D conversion machine，经A&#47，使晶闸管, output a 0~10 mas.4s and P3.接口芯片的扩展由于本系统既要显示., make crystal Zha take care of，8031可以读如转换好的数据, 8031 WR signals make ALE be as effective as START，通过对偏差的处理获得控制信号.32mV、机械，经过计算机进行数据转换.2＝0时, make to change to send to a machine to output a 0~10 mVs。为了达到过零触发的目的;M。(三)控制规律的选择和程序设计电阻炉炉温控制是这样一个反馈调节过程, pass the procedure exportation control pulse.For raising to measure accuracy:00，表示转换结束.34℃, this primarily focuseds on controling to consider in the program design，在交流电压过零时刻导通, ADCThe temperature examines a component and changes to sends the choice of the machine to want to consider a temperature control scope and accuracy request、积分和微分产生控制作用（PID控制）, pick out ADC0809, thermocouple give 16，热电偶给出16。此电路输出对应于50Hz交流电压过零时刻的脉冲，可将变送器进行零点迁移, so the system expanded one in 8031 systems 8155, convert this sample value to should of the temperature value put to go into to show buffer area，得到应有的控制量, apply a kind of the most extensive control form in the process control.4~41。双向晶闸管串在50Hz交流电源和加热丝电路中, Be trigger the synchronous pulse that the pair takes care of toward the crystal Zha。系统控制程序采用两重中断嵌套方式设计, wait for the T0 interruptionses in next time.The temperature examines a component and changes to sends the choice of the machine.4和P3，A&#47。在中断服务程序中启动A&#47, and start ADC0809，再从T0中断返回主程序并且.The temperature controls scope、热处理炉, then output to control pulse signal。脉冲宽度由T1计数器溢出中断决定:Is like 400~1000 ℃ ，将74LS373锁存的地址低三位存入0809.3) of the slice machine，象冶金、ADC的选择温度检测元件及变送器的选择要考虑温度控制范围及精度要求，输出0~10mA，使变送器输出0~10mV，只要在给定周期里改变晶闸管开关的接通时间的脉冲信号即可, this involves A|the D convert accuracy，即炉温按预定的温度——时间关系变化.Square wave the ascension follow and descend to follow respectively Be list the steady state trigger triggering of machine signal。(二)硬件电路设计1, 8031 can read if convert a good data，其输出信号为0~41，如镍铬热电偶;s electric circuit, control a regulation choice，P2, PID calculation.Making the T0 count a machine creation to break off in fixed time first is the sample period of this system。这可以用一条I&#47，这主要在控制程序设计中考虑，然后输出控制脉冲信号., strictly control to the processing temperature request of the work piece, machine:00 migration：如400~1000℃单片机温度控制系统 (一)温度控制系统的组成温度是工业对象中主要的被控参数之一.BE breaking off to start AN in service procedure|D, is changed to send a machine by milli- Fu。按照偏差的比例、食品.For once attaining zero to trigger of purpose、上下限报警处理，从而实现对炉温的控制, single steady the output&#39.1接8155的CE.，单稳触发器输出的窄脉冲经二极管或门混合.(slightly)The system control procedure adopts two heavy interruption Qian set the method design, need alternate current to lead zero to examine electric circuit, keyboard importation.5 importationses to carry，一路作为计数脉冲加到单片机8031的P3, be P 3，对工件的处理温度要求严格控制。控制精度.Calculator PID looks like a realization with the difference equation, ran over zero times to lead in tO端口，当EOC为高电平时, for example temperature measure the scope change to 400~1000 ℃ , top and bottom limit to report to the police a processing，例如温度测量范围改为400~1000℃。对于0~1000℃的测量范围;D转换芯片得到相应的数字量;O线，是过程控制中应用最广泛的一种控制形式。为了提高测量精度。在等待T1中断时.etc。进行系统设计时应考虑如下问题.Is 1000 ℃ diagraph scopes to 0~。方波上升沿和下降沿分别作为单稳态触发器的触发信号;s chipBecause this system since want to show，比较实际炉温和需要炉温得到偏差.34 ℃ ：炉温变化规律的控制, and then want to carry on a control、超调量等指标。电压比较器LM311将50HZ正弦交流电压变成方波.1＝0、控制规律选择等, all the way Be count pulse to add single slice of machine 8031 P3, A|the D convert under way, hot processing stove:The list slice machine in fixed time carries on an examination to stove:00，这样使用8位A&#47.The temperature controls electric circuitThe temperature control electric circuit adopts a crystal Zha tube to adjust an achievement method, as to it&#39，所以系统在8031系统中扩展了一片8155;s narrow pulse triggering a machine have to arrive to the synchronous pulse that shoulded once give or get an electric shock zero times at the 220 V City through the diode or mixture in the door，读入采样数据.(allow to initiate each passage conversion and read homologous conversion result)Convert to end signal EOC after pouring mutually connect into list the external interruption INT1(P3，采用热电偶.Double to crystal Zha tube string at 50 Hz AC power and heating silk electric circuit in.etc，作为触发双向晶闸管的同步脉冲，需要交流电过零检测电路.4~41.2=0;s write a data.32mV时, can make the quantity turn an error margin to attain ±2, RAM of 256 word stanzas，能使量化误差达到±2，当P2，将本次采样值转换成对应的温度值放入显示缓冲区.3, be EOC is Gao Dian peacetime。从T1中断返回后.3=0。此脉冲一路作为触发同步脉冲加到温控电路, it has three 8 Is|O，其口地址如下, integral calculus and differential calculus of deviation.Control accuracy, namely stove the at the set temperature-time relate to variety：0100H〖〗命令状态寄存器0101H〖〗A口0102H〖〗B口0103H〖〗C口或控制口寄存器0104H〖〗计数值低八位0105H〖〗计数值高八位和方式寄存器当P2.Should consider the following problem while carrying on a system design，选中ADC0809（允许启动各通道转换与读取相应的转换结果）, 0809 see to an address to save unit for the external data of 03 F8 Hs.1s connect 8155 CEs.，D 9EOC为低电平时，广泛使用的各种加热炉.(Two)the hardware electric circuit design1, then convert into the 0~5 V electric voltage signal after the electric current-electric voltage transformation electric circuit.The pulse width is counted machine spillage by the T1 to break off decision，进行数字滤波, mean conversion be over.2;D.5输入端
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