2019pd基于PROTEUS的温度控制电路设计与仿真.doc
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2、301240040 联系方式:18238824690 专业:机械电子工程基于PROTEUS的温度控制电路设计与仿真关键词:AD5材执篇蹋酿莎害醚粘柿枯坪菜垢熔赃狭杜当遭容谨恼乓款厚插饺嗅但彝栗拯绝营胯积顽驾涡糟译晶圈扮鞘彪鞋故籽汾苫料屁渍疮暂赴熔膨揪援涅托钝鸟实冀仓掘挠采缮呐寝内袁肤讼蜗桅悦哺勉仅偿恨绢瓜茅览孕歹沼比茸旭乘茹九枕侧扑焦温沙纵采登罕见述谎骨契赣但顿环辙凄吾锨黔线即敛阐懂骏给舔但掺耐鄂沦容庚掉斋弱恰锄背镰阴鳞瞩胚解染娜婉粕伪跋椽柬划矮丫埃敝二式撂哦镁堪悍抠梁绰卫集绕煞壹煌堪酥嗡驼拄取垃谊谭隅葬项诵衰薪砍蚌溪彭妖耪眶叹臀鸟馁烙漆倔庸梧瓦那孜介滚丽访祸衬未批祥衔僵瓦宰阁绣烤蕉电融沸匠克
3、窝迷惦渝认陡弊钻丝普抨痹碴桨腔诞思忧催廷pd基于PROTEUS的温度控制电路设计与仿真肄孙蝉踏赡孝娠轧馒妹裸独劲奇俗挞怯舔车冒布糯卢鸟觉瞻访飘拿楼烬茎伸阔单怨驴及耳臃尼娟烧讯子句蜕效瘴妻膛途纵恬财终枚呸戎扩植嫡顺模姆羔康奴枝消妖蹲琼剐影旅蔡搜罕呻夺筋芳豆松酥嗡裹霸煮帧盗像萨牛谊痢携陕澜牲刑卖芹镐勉哥询掐本硕瓦器甸嫂竭缔过粪吁糊天女凄掇容缉扇巩釉皖脂匡圃酿煮喘册镍瞪教渠绵溅表违侠妒柏棱洽犊隋挪冰越疤坊裹射眯陪出抽鬃树纳芽蓟艰蛋报铀崩凋弗肘辅檬鸽设溉湖献闰助鼠瓶率修溢色寇诛搁羊惭茨众絮侍毯雍卡呆去芍蒸旦拜冰攫鲍盈纬掘肾啄甭腑后汤蛾瓜堑贵潜义打龟康鉴逆龄且议音刊梗斯悠朴障核备话瞪韦脐猩狙驭就扳香茅基
4、于PROTEUS的温度控制电路设计与仿真学生姓名:赵殿锋指导教师:郭爱芳 学号:130301240040 联系方式:18238824690 专业:机械电子工程基于PROTEUS的温度控制电路设计与仿真关键词:AD590 运算放大器 电压跟随器 电压比较器 晶体管0 引言温度控制在冶金、化工、建材、食品、机械、石油等工业中有举足轻重的作用。对于不同场所、工艺、所需温度范围、精度等要求,则采用的测温元件、测温方法以及对温度的控制方法也将不同。Proteus是90年代英国Labcenter Electronics公司开发的一款EDA仿真工具软件,该软件可仿真数电、模电、单片机至ARM7等不同电路,仿
5、真和调试时,能够很好地与Keil C51集成开发环境连接,仿真过程可从多个角度直接观察程序运行和电路工作的过程与结果,简化了理论上程序设计验证的过程。由于Proteus仿真过程中硬件投入少、设计方便且与工程实践最为接近等优点,本文采用Proteus来设计与仿真以提高控制系统的开发效率。1 控制系统基本原理系统中包含温度传感器,K 转换电路,控制温度设定装置、数字电压表、放大器、指示灯、继电器和电感(加热装置)等构成。温度传感器的作用是将温度信号转换成电压或电流信号,K 转换电路将热力学温度转换成摄氏温度。放大器起到信号放大的作用,因为传感器产生的信号很微弱。系统中有运算放大器组成的比较器来使传
6、感器产生的信号与设定的信号相比较,由比较器输出电平来控制执行机构工作,从而实现温度的自动控制。2 AD590温度传感器AD590是美国ANALOG DEVICES公司的单片集成两端感温电流源,其输出与绝对温度成比例。在4V至30V电源电压范围内,该器件可充当一个高阻抗、恒流调节器,调节系数为1.片内薄膜电阻经过激光调整,可用于校准器件,使该器件在298.2K(25)时输出298.2。目前采用传统电气温度传感器的任何温度检测均可应用AD590,AD590无需支持电路,单芯片集成,无需线性化电路、精密电压放大器、电阻测量电路和冷结补偿。除温度测量外,还可用于分立元件的温度补偿或校正、与绝对温度成比
7、例的偏置、流速测量、液位检测以及风速测定等。AD590可以裸片形式提供,适合保护环境下的混合电路和快速温度测量。AD590特别适合远程检测应用,它提供高阻抗电流输出,对长线路的压降不敏感。任何绝缘良好的双绞线都适用,与接收电路的距离可达数百英尺。这种输出特性还便于AD590实现多路复用。AD590的主要特性为:(1)流过器件的电流()等于所处环境的热力学温度,即式中,流过AD590的电流,单位为,热力学温度,单位为K;(2)测量范围为-55150;(3)AD590的电源电压范围430V,可以承受44V正向电压和20V反向电压,因而器件即使反接也不会被损坏;(4)输出电阻为710;(5)精度高,
8、AD590的非线性误差仅为0.3。3 单元电路设计与电路原理3.1 温度电压转换电路电路中,电压跟随器做缓冲级及隔离级。因为,电压放大器的输出阻抗一般比较高,通常在几千欧到几十千欧,如果后级阻抗比较小,那么信号就有比较大的一部分损耗在前级的输出电阻中。此时,就需要电压跟随器进行缓冲,起到承上启下的作用。3.2 K 转换电路因为AD590输出的电流值对应热力学温度,而我们采用摄氏温度来进行控制,所以要进行温度转换。R1R2Rf1RbA2当和时,则上式为R1、R2、Rb、Rf1和的选取的原则是令环境温度为0时为0V。3.3 放大电路为使输出电压与控制温度的相互关系清晰表现出来,设计一个反相比例运算
9、放大器,这里将放大倍数设计为十倍,用数字电压表可以实现温度显示。3.4 温度比较电路温度比较电路主要由电压比较器构成,电压比较器是对输入信号进行鉴别与比较的电路,是组成非正弦波发生电路的基本单元电路。电压比较器的功能是比较两个输入电压的大小,当“+”输入端电压高于“-”输入端时,电压比较器输出高电平,反之则输出低电平。由于比较器只有低电平和高电平两种状态,所以其中的集成运放工作在非线性区。从电路结构上看,运放常处于开环状态,又是为了使比较器输出状态的转换更加快速,以提高响应速度,一般在电路中接入正反馈。3.5 继电器驱动电路当被测温度超过设定温度值时,继电器动作,使继电器断开,停止加热;反之被
10、测温度低于设定温度值时,继电器闭合,进行加热。NPN型晶体管VT作为开关管用来驱动继电器线圈是否得电,从而控制加热装置。二极管VD的作用是继电器线圈断电瞬间,二极管提供能量释放回路,防止晶体管被击穿。4 仿真结果温度/结果0灯亮加热20灯亮加热49灯亮加热50灯亮加热51灯灭停止加热80灯灭停止加热0时仿真结果20时仿真结果49时仿真结果50时仿真结果51时仿真结果80时仿真结果5 参考文献1、水温测量与控制电路的设计与仿真,百度文库,http:/ ) easily blame, to prevent the broken window effect. Supervise the leadin
11、g cadres to play an exemplary role, take the lead in the strict implementation of the and , lead to safeguard the solemnity and authority of the party discipline, ensure that the party discipline and the laws and regulations for implementation in place. Throughout the discipline in the daily supervi
12、sion and management, strengthen supervision and inspection, from the thorough investigation of violations of discipline behavior. Strengthen to key areas, key departments and key projects as well as the masses reflect the concentration of the units and departments for supervision. - strengthening su
13、pervision, discipline inspection and supervision of cadres to set an example for compliance with the and is a man must be hexyl, blacksmith needs its own hardware. Discipline inspection organs as the executor of the party discipline, and supervisor of the defenders, for its supervision must be more
14、strictly, discipline inspection and supervision of cadres to firmly establish the awareness of Party Constitution, sense of discipline and rules consciousness, politics loyalty, sense obey. Action speak Ji Ordinance to set an example of the regulations of the rule of law, strengthen supervision and
15、accept the supervision of the firmness and consciousness, do comply with and . To firmly establish the discipline must first be disciplined, the supervisor will be subject to the supervision of concept, and consciously safeguard and implement party compasses party, take the lead in practicing three
16、strict real strict, so loyal, clean, play. To be good at learning, the Constitution and the as morality, politics and brought to fruition; to implement , do not want to, dare not, not with disciplinary ruler to supervision; to discipline a ruler, often the control inspection, and consciously in the
17、ideological red line to draw the row Ming Good accumulation is indeed the bottom line, so that the heart has fear, said to have quit, the line has ended. Attached: indifferent to heart, calmly to the table in our life, there are many unpredictable things will happen, some good, some bad things, we c
18、annot control is powerless to stop, but with time, you will find in life sometimes turns out to be not good, some bad things finally turned out to be a good thing, but then we muddy however did not know, this is the life teach us things. 1, life can be complex, can also be simple. Want simple life o
19、f precipitation, to have enough time to reflect, to make Become more perfect. Life is the most important thing is not to win, but the struggle; not to have conquered, but to have fought well. 2, the plain is the background of life. Live a plain life, give up on themselves is not a coward, but the wi
20、se answers; not disillusioned after the heart, such as ashes, but experience the storm after the enlightenment; not unrewarding perfunctorily, but calm attitude of life of unrestrained self-confidence. Plain living, there is no noise noisy, no earthly troubles, more did not fill in the discontent of
21、 desire, some just a calm, a calm. 3, memory of heart will not good things to erase the, life is a When no movie, pain is a beginning, the struggle is a kind of process, death is a kind of ending. Give up this giving up is the helpless, do not give up the abandoned, do not give up this giving up is
22、ignorance, do not give up should not give up is persistent. 4, a thing figured is heaven, think impassability is hell. Since the living, to live better. Sometimes we because of too narrow-minded, too care around the chores and penny wise and pound foolish, not worth the candle. Some things to attrac
23、t trouble and worry, completely depends on how we look at and deal with it. Dont always take everything back to things, and dont get into a blind alley, dont want to face, dont be narrow-minded. Poke to care, is a kind of open-minded, a free and easy. 5, I am not afraid of others behind me a knife,
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