仓储多点温湿度监测系统设计【自动化毕业论文开题报告外文翻译说明书】.zip
收藏
资源目录
压缩包内文档预览:(预览前15页/共37页)
编号:22399125
类型:共享资源
大小:10.49MB
格式:ZIP
上传时间:2019-10-16
上传人:小***
认证信息
个人认证
林**(实名认证)
福建
IP属地:福建
50
积分
- 关 键 词:
-
自动化毕业论文开题报告外文翻译说明书
【说明书论文开题报告外文翻译】
系统设计【说明书论文开题报告外文翻译】
毕业设计开题报告
- 资源描述:
-
仓储多点温湿度监测系统设计【自动化毕业论文开题报告外文翻译说明书】.zip,自动化毕业论文开题报告外文翻译说明书,【说明书论文开题报告外文翻译】,系统设计【说明书论文开题报告外文翻译】,毕业设计开题报告
- 内容简介:
-
毕 业 设 计(论 文)任 务 书1本毕业设计(论文)课题应达到的目的: 本课题是应用性课题,要求学生通过设计一个单片机控制系统对单片机原理及其开发技术作一个全面的复习,完成系统电路原理图、学会选择各种接口器件并掌握接口技术,制作出符合设计要求的硬件电路板,并编写相应的程序和进行程序的调试。通过毕业设计进一步提高自已的动手能力。 通过本毕业设计,使学生能综合大学期间所学的知识,学会通过查阅资料,根据要求独立完成一个单片机测控系统的设计,硬件制作和程序编写,从而培养学生的独立设计能力和应用能力。2本毕业设计(论文)课题任务的内容和要求(包括原始数据、技术要求、工作要求等): 本课题是应用性课题,要求学生通过设计一个单片机控制系统对单片机原理及其开发技术作一个全面的复习,完成系统电路原理图、学会选择各种接口器件并掌握接口技术,制作出符合设计要求的硬件电路板,并编写相应的程序和进行程序的调试。通过毕业设计进一步提高自已的动手能力。要求设计一个仓储多点温湿度监测系统设计,通过对目前已有的多点温湿度监测系统进行分析,通过传感器、接口电路、单片机以及测距系统的研究,达到能在一定精度范围内监测温度湿度并进行数据综合处理的要求。 要求:1.设计系统实现方案,并进行仿真调试,验证设计方案2.选择控制器,进行硬件电路的设计,包括检测电路、提示电路上、显示电路、操控电路、外围辅助电路等;3.软件编制程序,实现系统各部分的功能4.系统焊接和调试,实现各功能测试5.封装实物电路。毕 业 设 计(论 文)任 务 书3对本毕业设计(论文)课题成果的要求包括图表、实物等硬件要求: 1设计单片机控制系统,画出系统原理图。2编写相应的控制程序(附全部程序)3进行系统仿真,总体调试通过,编写设计说明书。4完成毕业设计论文(1万字(含程序等)。 5. 要求结合毕业设计(论文)课题参阅一篇以上的外文资料,并翻译至少一万印刷符(或译出3千汉字)以上的译文。4主要参考文献: 1秦伟.温湿度监测系统设计D西安:长安大学工程硕士学位论文,2013.52栾瑞.无线温湿度监测系统的设计D.吉林大学硕士学位论文,2013.113王福瑞.单片微机测控系统设计大全M. 北京航空航天大学出版社,19984张川,刘彤.无线湿温度监测系统的设计J.应用科技. 2010,37(10):24-265冯平,夏颖,张治中.数字温度报警器的设计与实现J.广东通信技术. 2009,29(4):28-30 6夏如孝,肖文波.温湿度实时采集与无线传输系统的研究现代电子技术J2012,35(09):157-1587吴琳,杨林,赵桂丰.基于单片机的温度数据采集器J.现代电子技术,2008,(19)8凌志浩.AT89C52 单片机原理与接口技术M.高等教育出版社,20119邓星灵,康赫男,基于nRF905无线温湿度采集系统设计J,仪表技术,2012,2810徐敏;诸葛振荣等.基于 1-Wire 技术的数字温度仪J .机电工程.2007(04):20-21 11智能温度传感器 DS18B20 的原理与应用2013-02 /view/12e4c1cbda38376baf1fae8e 12焦传海. 基于nRF9E5的有源超高频RFID系统设计J.今日电子,2007(03):79-8213沈庆阳,郭庭吉,8051单片机实践与应用M.清华大学出版社,200214王何宇,朱莉.基于 nRF905 的温湿度无线数据传输系统J.微处理器与可编程器件 应用.2011,25(05):78-81 15倪天龙.单总线传感器 DHT11 在温湿度测控中的应用J.单片机与嵌入式系统应用,2010,(5):60-62毕 业 设 计(论 文)任 务 书5本毕业设计(论文)课题工作进度计划:起讫日期工 作 内 容2015.11.102015.12.13调研、收集相关资料、对学生进行初步辅导,拟题、选题、填写任务书。2015.12.152015.12.31学生查看任务书,为毕业设计的顺利完成,进行前期准备。12月31日前正式下发任务书。12月21日两个系提交专业选题分析总结(撰写要求详见对内通知中附件2)2016.01.092016.04.05学生在指导教师的具体指导下进行毕业设计创作;拟定论文提纲或设计说明书(下称文档)提纲;撰写及提交开题报告、外文参考资料及译文、论文大纲;在2016年4月5日前学生要提交基本完成的毕业设计创作成果以及文档的撰写提纲,作为中期检查的依据。指导教师指导、审阅,定稿由指导教师给出评语,对论文主要工作未通过的学生下发整改通知。2016.04.062016.04.10提交中期课题完成情况报告给指导教师审阅;各专业组织中期检查(含毕业设计成果验收检查)。2016.04.112016.05.10进行毕业设计文档撰写;2016年5月8日为学生毕业设计文档定稿截止日。2016年5月9日-13日,指导教师和评阅教师通过毕业设计(论文)管理系统对学生的毕业设计以及文档进行评阅,包括打分和评语。5月1日前,做好答辩安排,通知学生回校进行答辨2016.05.142016.05.15查看答辩安排,毕业设计(论文)小组答辩2016.05.162016.05.29对未通过答辨的学生进行二次答辨完成毕业设计的成绩录入2016.05.302016.06.07根据答辩情况修改毕业设计(论文)的相关材料,并在毕业设计(论文)管理系统中上传最终稿,并且上交纸质稿。2016年6月7日为学生毕业设计文档最终稿提交截止日。2016.06.072016.06.30各系提交本届毕业设计(论文)的工作书面总结及相关材料。所在专业审查意见:通过负责人: 2015 年 12 月21 日 毕 业 设 计(论文) 开 题 报 告 1结合毕业设计(论文)课题情况,根据所查阅的文献资料,每人撰写不少于1000字左右的文献综述: 随着社会经济的发展,温湿度监测系统已广泛应用于人们的日常生活中。农业生产,粮食存储管理,食品储运,高科技研发实验室,博物馆文物,档案管理,建材实验,重要的医疗场所,各企业库房等场合几乎都需要监测空气的温度和湿度。目前我国大多数的温湿度监测系统仍然采用有线传输的方法,而有线传输设备,不仅会因为大量铺设的光纤或者电缆降低了系统的灵活性、可维护性和可扩展性,而且当电源线、控制线和信号线混在一起时,还可能会出现相互之间干扰的现象,尤其是当监测点过多时,不仅成本更高,而且布线会更复杂,有线传输的问题也会更严重。因此,建立一个高效的、性价比更高的温湿度监测系统具有重要的意义。温湿度监测研究现状 传统的温度测量是将温度计放置在测量点,然后根据需要读取温度,但是当监测点过多时,就会需要更多的人去记录数据,这种监测方法浪费了大量的人力,而且由于温度计的精度,人工读数等人为的因素,导致温度检测具有以下不足(1)速度慢;(2)精度低;(3)实时性差。 随着科技的发展,由采样器、电阻式温度传感器以及用于数据转换的数模转换器等组成的监测系统与原有的监测方法相比,该监测系统具有(1)检测速度快;(2)可以对各个监测点进行巡回监测;(3)精度高;(4)降低了劳动强度等特点。但是该检测系统仍然存在着不足之处,电阻式传感器灵敏度不高,电阻的阻值易受温度、湿度的影响,导致该监测系统的精度、可靠性达不到相应的精度。21世纪初期,监测系统的软、硬件得到了改善和提高,集中体现为:(1)热电偶传感器和半导体传感器的出现;(2)单片机的应用使数据传输及检测速度得到了提高;(3)采用串行传输的方式;(4)采用矩阵式布线技术;(5)运用软硬件的急速组合的方法。 国际上新型温度传感器的变化趋势由模拟时代向数字时代,集成化到智能化以及网络化的方向发展。此时我国也生产出很多与数字传感器相结合的产品,有远程控制模块、中继器等产品,产品的技术和质量都达到国际水平。 最简单的湿度传感器是湿敏元件。湿敏元件主要有两大类:(1)电阻式,具有灵敏度高的优点;缺点是线性度差,产品互换性差;(2)电容式,具有制造方便、响应速度快、灵敏度高、湿度的滞后量小、小型化和集成化容易实现等优点;缺点是灵敏度低。 近几年来,湿度传感器的发展在国内外都得到了很大的进步,其中最主要体现在以下两个方面:(1)湿度传感器逐步由分立元件到集成化、智能化、系统化的方向迅速发展,对开发创造更高端湿度监测系统创造力前提条件;(2)湿度测量系统中运用了自动温度补偿、自动校准湿度、线性化处理等多项先进技术。 有了无线温度与湿度的监测系统后,它可以及时向相关工作人员提供监测点的实时温湿度数据信息,让相关工作人员第一时间掌握现场监测情况并及时的采取必要措施,就不会出现盲目采集监测点温湿度的现象了,极大地减少了劳动强度,因此使用后会带来较高的经济效益,而且对于监测点温湿度的监测会相对容易的多,给相关工作人员带来了极大地方便,对于需要进行温湿度监测的群体而言具有很大的意义。发展前景 现代化规模农业生产需要科学技术支撑。无线温湿度监测系统能实时、准确地测量并显示各监测点的温湿度,从而使相关工作人员能及时地、有效地采取相关措施,保证各监测点达到监测的目的。 无线传输技术是现代传感器技术、微电子技术、通信技术、嵌入式计算技术和分布式信息处理技术等多个学科的综合。把无线传输技术引入到粮仓以及温室大棚生产中来,农业将有可能逐渐地从以人力为中心,依赖于孤立的生产模式转变为以信息和软件为中心的生产模式。从而实现粮仓、蔬菜大棚、温室等信息采集自动部署、自动组织传输和智能控制、大幅度提高单位面积的劳动生产率和资源产出率、改善其设施内工作环境和工作条件、提高工作效率、保障劳动人民身体健康、提高大家的生活质量,对实现环保节约保护的可持续发展具有重要意义。 除此之外,温湿度数据监测系统具有广阔的发展前景。在未来的几年,其市场需求将会日益增大,具体可应用在以下几个方面:(1)粮食存储仓库的温湿度控制;(2)温室种植、养殖场繁殖的温湿度控制;(3)中央空调系统的需求;(4)厂房环境的温湿度控制;(5)实验室环境的温室度控制。参考文献1秦伟.温湿度监测系统设计D西安:长安大学工程硕士学位论文,2013.52栾瑞.无线温湿度监测系统的设计D.吉林大学硕士学位论文,2013.113王福瑞.单片微机测控系统设计大全M. 北京航空航天大学出版社,19984张川,刘彤.无线湿温度监测系统的设计J.应用科技. 2010,37(10):24-265冯平,夏颖,张治中.数字温度报警器的设计与实现J.广东通信技术. 2009,29(4):28-30 6夏如孝,肖文波.温湿度实时采集与无线传输系统的研究现代电子技术J2012,35(09):157-1587吴琳,杨林,赵桂丰.基于单片机的温度数据采集器J.现代电子技术,2008,(19)8凌志浩.AT89C52 单片机原理与接口技术M.高等教育出版社,20119邓星灵,康赫男,基于nRF905无线温湿度采集系统设计J,仪表技术,2012,2810徐敏;诸葛振荣等.基于 1-Wire 技术的数字温度仪J .机电工程.2007(04):20-21 11智能温度传感器 DS18B20 的原理与应用2013-02 /view/12e4c1cbda38376baf1fae8e 12焦传海. 基于nRF9E5的有源超高频RFID系统设计J.今日电子,2007(03):79-8213沈庆阳,郭庭吉,8051单片机实践与应用M.清华大学出版社,200214王何宇,朱莉.基于 nRF905 的温湿度无线数据传输系统J.微处理器与可编程器件 应用.2011,25(05):78-81 15倪天龙.单总线传感器 DHT11 在温湿度测控中的应用J.单片机与嵌入式系统应用,2010,(5):60-62毕 业 设 计(论文) 开 题 报 告 2本课题要研究或解决的问题和拟采用的研究手段(途径): 本课题拟设计一个温湿度采集系统和无线接收控制系统。拟采用的研究手段:进行系统硬件设计,用AT89C51单片机、一个温度传感器、一个湿度传感器、报警装置和无线收发模块组成硬件电路。进行系统软件设计时,使用Keil开发平台,使用学过的C语言编写程序,包括发送模块主程序设计、DS18B20程序设计、SHT10程序设计、显示电路子程序设计、报警电路子程序设计,编完程序用Proteus仿真软件进行仿真与调试。最后进行一下硬件调试,软件调试,软硬件联调,调试成功就行了。系统硬件设计:包括系统总体设计(系统设计方案、系统的组成、设计指标);单片机的选择(AT89C52单片机的特点、AT89C52单片机的最小系统);温度传感器(DS18B20引脚功能、DS18B20测温原理);湿度传感器(SHT10的主要特点、SHT10的典型电路和引脚介绍、命令与时序);显示电路;温湿度报警电路;无线收发模块(NRF905的工作模式、NRF905的寄存器配置、SPI时序)。系统软件设计:包括软件开发平台及开发语言介绍(Keil开发平台、C语言介绍);发送模块主程序流程图;DS18B20程序设计;SHT10程序设计;显示电路子程序;报警电路子程序;NRF905无线模块(NRF905发送流程、NRF905接收流程)。仿真与调试:包括仿真软件与仿真结果(Proteus仿真软件介绍、仿真结果);硬件调试;软件调试;软硬件联调。毕 业 设 计(论文) 开 题 报 告 指导教师意见:1对“文献综述”的评语: 能认真阅读相关的资料,并对与毕业设计相关的资料进行分析,介绍了温度传感 器、湿度传感器及无线温湿度检测的国内外应用现状及发展趋势,对研究无线温湿度检测系统的意义也比较明确,文献综述条理清楚,格式正确。2对本课题的深度、广度及工作量的意见和对设计(论文)结果的预测: 通过设计一个集成温湿度检测与无线接收控制功能的无线温湿度检测控制系统,完成电路的设计,程序的设计,并利用Proteus仿真软件对所设计的电路进行仿真验证。 课题有一定的深度和广度,如果认真完成毕业设计,结果符合本科毕业设计要求。3.是否同意开题: 同意 不同意 指导教师: 2016 年 01 月 05 日所在专业审查意见:同意 负责人: 2016 年 03 月 28 日英文文献Summary: The principle and functions of the temperature control system based on microcontroller AT89S51 are studied, and the temperature measurement unit consists of the 1-Wire bus digital temperature sensor DS18B20. The system can be expected to detect the preset temperature, display time and save monitoring data. An alarm will be given by system if the temperature exceeds the upper and lower limit value of the temperature which can be set discretionarily and then automatic control is achieved, thus the temperature is achieved monitoring intelligently within a certain range. Basing on principle of the system, it is easy to make a variety of other non-linear control systems so long as the software design is reasonably changed. The system has been proved to be accurate, reliable and satisfied through field practice. KEYWORDS: AT89S51; microcontroller; DS18B20; temperatureI. INTRODUCTION Temperature is a very important parameter in human life. In the modern society, temperature control (TC) is not only used in industrial production, but also widely used in other fields. With the improvement of the life quality, we can find the TC appliance in hotels, factories and home as well. And the trend that TC will better serve the whole society, so it is of great significance to measure and control the temperature. Based on the AT89S51 and temperature sensor DS18B20, this system controls the condition temperature intelligently. The temperature can be set discretionarily within a certain range. The system can show the time on LCD, and save monitoring data; and automatically control the temperature when the condition temperature exceeds the upper and lower limit value. By doing so it is to keep the temperature unchanged. The system is of high anti-jamming, high control precision and flexible design; it also fits the rugged environment. It is mainly used in peoples life to improve the quality of the work and life. It is also versatile, so that it can be convenient to extend the use of the system. So the design is of profound importance. The general design, hardware design and software design of the system are covered. II. SYSTEM GENERAL DESIGN The hardware block diagram of the TC is shown in Fig. 1. The system hardware includes the microcontroller, temperature detection circuit, keyboard control circuit, clock circuit, Display, alarm, drive circuit and external RAM. Based on the AT89S51, the DS18B20 will transfer the temperature signal detected to digital signal. And the signal is sent to the microcontroller for processing. At last the temperature value is showed on the LCD 12232F. These steps are used to achieve the temperature detection. Using the keyboard interface chip HD7279 to set the temperature value, using the microcontroller to keep a certain temperature, and using the LCD to show the present value for controlling the temperature. In addition, the clock chip DS1302 is used to show time and the external RAM 6264 is used to save the monitoring data. An alarm will be given by buzzer in time if the temperature exceeds the upper and lower limit value of the temperature. III. HARDWARE DESIGN A. Microcontroller The AT89S51 is a low-power, high-performance CMOS 8-bit microcontroller with 4K bytes of in-system programmable Flash memory. The device is manufactured using Atmels high-density nonvolatile memory technology and is compatible with the industry-standard 80C51 instruction set and pin out. The on-chip Flash allows the program memory to be reprogrammed in-system or by a conventional non volatile memory programmer. By combining a versatile 8-bit CPU with in-system programmable Flash on a monolithic chip, the Atmel AT89S51 is a powerful microcontroller which provides a highly-flexible and cost-effective solution to many embedded control applications. Minimum system of the microcontroller is shown in Fig. 2. In order to save monitoring data, the 6264 is used as an external RAM. It is a static RAM chip, low-power with 8K bytes memory. B. Temperature Detection Circuit The temperature sensor is the key part in the system. The Dallas DS18B20 is used, which supports the 1-Wire bus interface, and the ON-BOARD Patented is used internally. All the sensor parts and the converting circuit are integrated in integrated circuit like a transistor 1. Its measure range is -55 125 , and the precision between -10 85 is 0.5 2 ,3. The temperature collected by the DS18B20 is transmitted in the 1-Wire bus way, and this highly raises the system anti-jamming and makes it fit in situ temperature measurement of the rugged environment .There are two power supply ways for the DS18B20. The first is external power supply: the first pin of the DS18B20 is connected to the ground; the second pin serves as signal wire and the third is connected to the power. The second way is parasite power supply 5. As the parasite power supply will lead to the complexity of the hardware circuit, the difficulty of the software control and the performance degradation of the chip, etc. But the DS18B20(s) can be connected to the I/O port of the microcontroller in the external power supply way and it is more popular. Therefore the external power supply is used and the second pin is connected to the pin P1.3 of the AT89S51. Actually, if there are multipoint to be detected, the DS18B20(s) can be connected to the 1-Wire bus. But when the number is over 8, there is a concern to the driving and the more complex software design as well as the length of the 1-Wire bus. Normally it is no more than 50m. To achieve distant control, the system can be designed in to a wireless one to break the length limit of the 1-Wire bus 6. C. LCD Circuit The LCD 12232F is used, which can be used to show characters, temperature value and time, and supply a friendly display interface. The 12232F is a LCD with 8192 12832 pixels Chinese character database and 128 168 pixels ASCII character set graphics. It mainly consists of row drive/column drive and 12832 full lattice LCD with the function of displaying graphics as well as 7.52 Chinese characters. It is in a parallel or serial mode to connect to external CPU . In order to economize the hardware resource, the 12232F should be connected to the AT89S51 in serial mode with only 4 output ports used.The LCD grayscale can be changed by adjusting the variable resistor connected the pin Vlcd of the LCD. CLK is used to transmit serial communication clock. SID is used to transmit serial data. CS is used to enable control the LCD. L+ is used to control the LCD backlight power. D. Clock Circuit The Dallas DS1302 is used, which is a high performance, low-power and real-time clock chip with RAM. The DS1302 serves in the system with calendar clock and is used to monitor the time. The time data is read and processed by the AT89S51 and then displayed by the LCD. Also the time can be adjusted by the keyboard.The DS1302 crystal oscillator is set at 32768Hz, and the recommended compensation capacitance is 6pF. The oscillator frequency is lower, so it might be possible not to connect the capacitor, and this would not make a big difference to the time precision. The backup power supply can be connected to a 3.6V rechargeable battery. E. Keyboard Control Circuit The keyboard interface in the system is driven by the HD7279A which has a +5V single power supply and which is connected to the keyboard and display without using any active-device. According to the basic requirements and functions of the system, only 6 buttons are needed. The systems functions are set by the AT89S51 receiving the entered data. In order to save the external resistor, the 16 keyboard is used, and the keyboard codes are defined as: 07H, 0FH, 17H, 1FH, 27H, 2FH. The order can be read out by reading the code instruction. HD7279A is connected to the AT89S51 in serial mode and only 4 ports are need. As shown in Fig. 6, DIG0DIG5 and DP are respectively the column lines and row line ports of the six keys which achieve keyboard monitoring, decoding and key codes identification. F. Alarm Circuit In order to simplify the circuit and convenient debugging, a 5V automatic buzzer is used in the alarm circuit 8. And this make the software programming simplified. As shown in Fig. 7, it is controlled by the PNP transistor 9012 whose base is connected to the pin P2.5 of the AT89S51. When the temperature exceeds the upper and lower limit value, the P2.5 output low level which makes the transistor be on and then an alarm is given by the buzzer. G. Drive Circuit A step motor is used as the drive device to control the temperature. The four-phase and eight-beat pulse distribution mode is used to drive motor and the simple delay program is used to handle the time interval between the pulses to obtain different rotational speed. There are two output states for the step motor. One: when the temperature is over the upper value, the motor rotates reversely (to low the temperature), while when lower than the lower limit value, the motor rotates normally (to raise the temperature); besides not equals the present value. Two: when the temperature is at somewhere between the two ends and equals the present value, the motor stops. These steps are used to achieve the temperature control. In addition, the motor speed can also be adjusted by relative buttons. As shown in Fig. 8, the code data is input through ports A11A8 (be P2.3P2.0) of the AT89S51 and inverted output by the inverter 74LS04. Finally it is amplified by the power amplifier 2803A to power the motor.IV. SOFTWARE DESIGN According to the general design requirement and hardware circuit principle of the system, as well as the improvement of the program readability, transferability and the convenient debugging, the software design is modularized. The system flow mainly includes the following 8 steps: POST (Power-on self-test), system initiation, temperature detection, alarm handling, temperature control, clock chip DS1302 operation, LCD and keyboard operation. The main program flow is shown in Fig. 9. Give a little analysis to the above 8 tasks, it is easy to find out that the last five tasks require the real time operation. But to the temperature detection it can be achieved with timer0 timing 1 second, that is to say temperature detection occurs per second. The system initiation includes global variable definition, RAM initiation, special function register initiation and peripheral equipment initiation. Global variable definition mainly finishes the interface definition of external interface chip connected to the AT89S51, and special definition of some memory units. RAM initiation mainly refers to RAM processing. For example when the system is electrified the time code will be stored in the internal unit address or the scintillation flag will be cleared. The special function register initiation includes loading the initial value of timer and opening the interrupt. For example, when the system is electrified the timer is initialized. The peripheral equipment initiation refers to set the initial value of peripheral equipment. For example, when the system is electrified, the LCD should be initialized, the start-up display should be called, the temperature conversion command should be issued firstly and the clock chip DS1302 should also be initialized. The alarm handling is mainly the lowering and the raising of temperature to make the temperature remain with the preset range. When the temperature is between the upper and the lower limit value, it goes to temperature control handling, that is to say the temperature need to be raised or lowered according to the present value. By doing so make the condition temperature equal to the present value and hence to reach the temperature target. V. CONCLUSION The temperature control system has the advantages of friendly human-computer interaction interface, simple hardware, low cost, high temperature control precision (error in the range of 1 ), convenience and versatility, etc. It can be widely used in the occasions with -55 to 125 range, and there is a certain practical value.译文:温度控制系统的设计摘要:研究了基于AT89S51单片机温度控制系统的原理和功能,温度测量单元由单总线数字温度传感器DS18B 20构成。该系统可进行温度设定,时间显示和保存监测数据。如果温度超过任意设置的上限和下限值,系统将报警并可以和自动进行相关动作,从而达到温度监测智能一定范围内。基于系统的原理,很容易使其他各种非线性控制系统,只要在软件设计上做合理的改变。该系统的准确性能和可靠性已得到证实。关键词:单片机;温度;温度I. 导言 温度是在人类生活中非常重要的参数。在现代社会中,温度控制(TC)不仅用于工业生产,还广泛应用于其它领域。随着生活质量的提高,我们可以发现在酒店,工厂和家庭,以及比赛设备。而比赛的趋势将更好地服务于整个社会,因此它具有十分重要的意义测量和控制温度。 在AT89S51单片机和温度传感器DS18B20的基础上,系统环境温度智能控制。温度可设定在一定范围内动任意。该系统可以显示在液晶显示屏的时间,并保存监测数据,并自动地控制温度,当环境温度超过上限和下限的值。这样做是为了保持温度不变。该系统具有很高的抗干扰能力,控制精度高,灵活的设计,它也非常适合这个恶劣的环境。它主要应用于人们的生活,改善工作和生活质量。这也是通用的,因此它可以方便地扩大使用该系统。因此,设计具有深刻的重要性。一般的设计,硬件设计和软件系统的设计都包括在内。II. 系统总体设计 该系统硬件包括微控制器,温度检测电路,键盘控制电路,时钟电路,显示,报警,驱动电路和外部RAM。基于AT89S51单片机,DS18B20的将温度信号传送到数字信号的检测。和信号发送到微控制器进行处理。最后,温度值显示在液晶12232F。这些步骤是用来实现温度检测。使用键盘接口芯片HD7279在设定温度值,使用微控制器保持一定的温度,并使用液晶显示的温度控制设定值。此外,时钟芯片DS1302用于显示时间和外部RAM6264是用来保存监测数据。报警将给予及时蜂鸣器如果温度超过了上限和下限温度值。III. 硬件设计A. 微控制器 在AT89S51单片机是一种低功耗,高性能CMOS 8位4K的系统内可编程闪存字节微控制器。该设备是采用Atmel的高密度非易失性内存技术,并与业界标准的80C51指令集和引脚兼容。Atmel的单片机AT89S51是一个功能强大的微控制器,它提供了一个高度灵活的和具有成本效益的解决方案很多嵌入式控制应用。为了节省监测数据,6264是用来作为外部RAM。它是一个静态RAM芯片,低功耗具有8K字节的内存。B. 温度检测电路 温度传感器是该系统的关键部分。达拉斯DS18B20的使用,它支持1 - Wire总线接口,板上专利是在内部使用。所有的传感器部分和转换电路集成在一个晶体管集成电路像1。其测量范围为-55125,在-1085精度为0.52,3。由DS18B20的温度采集传输在1 - Wire总线的方式,这种高度提高了系统的抗干扰,使之适合在恶劣的环境现场温度测量。有两个电源DS18B20的供应
- 温馨提示:
1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
2: 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
3.本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

人人文库网所有资源均是用户自行上传分享,仅供网友学习交流,未经上传用户书面授权,请勿作他用。