水溫检测报警毕业专业论文3476808.docxVIP

摘 要 本设计采用的主控芯片是宏晶科技的STC89C52单片机，数字温度传感器是DALLAS公司的DS18B20。本设计用数字传感器DS18B20测量温度，测量精度高，传感器体积小，使用方便。所以本次设计的数字温度计在工业、农业、日常生活中都有广泛的应用。 单片机技术已经广泛应用社会生活的各个领域，已经成为一种非常实用的技术。51单片机是最常用的一种单片机，而且在高校中都以51单片机教材为蓝本，这使得51单片机成为初学单片机技术人员的首选。本次设计采用的STC89C52是一种flash型单片机，可以直接在线编程，向单片机中写程序变得更加容易。本次设计的数字温度计采用的是DS18B20数字温度传感器，DS18B20是一种可组网的高精度数字式温度传感器，由于其具有单总线的独特优点，可以使用户轻松地组建起传感器网络，并可使多点温度测量电路变得简单、可靠。 本设计根据设计要求，首先设计了硬件电路，然后绘制软件流程图及编写程序。本设计属于一种多功能温度计，温度测量范围是-55℃到125℃。温度值的分辨率可以被用户设定为9-12位，可以设置上下限报警温度，当温度不在设定的范围内时，就会启动报警程序报警。本设计的显示模块是用四位一体的数码管动态扫描显示实现的。在显示实时测量温度的模式下还可以通过查询按键查看设定的上下限报警温度。 关键词：单片机、数字温度计、DS18B20、STC89C52 Abstract This design adopts the main control chip is macrocrystalline STC89C52 single-chip computer technology, digital temperature sensor DS18B20 is DALLAS company. This design USES digital temperature sensor DS18B20 measurement, high measuring precision, sensors, small volume, easy to use. So the design of digital thermometer in industry, agriculture, daily life has a wide range of applications. Single chip microcomputer technology has been widely used in the all fields of social life, has become a very useful technique. 51 single chip microcomputer is the most commonly used one kind of single chip microcomputer, and in the colleges and universities in teaching materials based on 51 single-chip microcomputer and this makes 51 single chip microcomputer of choice for beginners microcontroller technology personnel. This design USES the microcontroller STC89C52 is a flash type, can be directly online programming, it easier to write programs to the single chip microcomputer. The design of digital thermometer USES DS18B20 digital temperature sensor, DS18B20 is a network of high precision digital temperature sensor, since it has the distinct advantage of the single bus, enables users to easily assemble a sensor network, and can make multi-point temperature measurement circuit is simple and reliable. This design according to the design requirements, first, design the hardwar