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随着科学技术的发展,监控系统对人们的生活影响越来越大。
在生活中的各个方面都涉及到监控技术。
在本设计中,是以温度为监控研究对象并结合单片机及接口技术采用部分边沿科技设计的一个温度监控系统。
利用温度数字传感器DS18B20采集温度,利用CPU处理后通过74LS47将其显示在数码管上。
且可以通过串口设定密码和温度的上下限当所测温度低于设定温度时,利用加热器加热;当所测温度高于设定温度时发出报警并给出一定的控制信号. 本文主要阐述了温度采集模块,显示模块,控制隔离模块设计,温度采集模块采用数字传感器DS18B20;显示模块由三个八段数码管,74LS47,ADC0808等组成;控制隔离模块由光电隔离器,双向可控硅整流桥、变压器等组成。
最后针对温控系统进行了实验仿真,通过对仿真的分析表明本文所述的基于单片机的温控系统的设计的合理性和有效性。
单片机、传感器DS18B20、温度监控系统、控制隔离电路 Along with the development of science and technology the life influence of monitoring system for people are farther. In the aspect of each life people are concerned with monitoring technology. In the design it is a temperature monitoring system which is to take temperature as to monitor the research object and combine MCU and the interface techniques. In the system we adopt the partial edge design of science and technology. passing through 74LS47 it is able to show it to the figures tube up after using CPU handling. The system can set the last lower limit of cipher and temperature through button when the temperature measured is low to sets temperature we are using heater to heat up. When the temperature measured is higher than set temperature the device generates to alarm and gives certain control signal. This article mainly elaborated the temperature gathering electric circuit the display circuit the control isolation circuit design the gathering electric circuit byDS18B20 sensor three eight-digital74LS47 ADC0808 components the control isolation circuit by the photoelectric isolator a two-way SCR components. Finally temperature control system for the experimental simulation the analysis of simulation described in this article shows that the design of temperature control system based on Microcontroller is availability and rationality. MCU、sensor 、temperature monitor system DS18B20 、control isolation circuit 目 录 1.1 系统功能描述 .............................................. 2 1.2 系统的控制回路设计..........................................3 1.3 硬件设计概述 .............................................. 4 2.1 温度传感器DS18B20简介 .................................... 7 2.2 输入接口电路 .............................................. 9 3.1 LED简介 .................................................. 10 3.1.1 LED显示器的结构及原理 .............................. 10 3.1.2 LED数码管的显示方法 ................................ 11 3.2 LED显示驱动器芯片74LS47 ................................. 11 3.3 显示接口电路 ............................................. 13 4.1 光电隔离技术 ............................................. 14 4.2 双向可控硅 ............................................... 15 4.3 单相桥式整流滤波电路 ..................................... 15 4.4控制隔离电路 ......................................