2016年智能压力变送器的研制 济南大学毕业设计.doc

毕业设计 题 目 学 院 专 业 班 级 学 生 学 号 指导教师 二〇一四年月 本设计主要是以ATC8951单片机为核心的信号测量数据处理显示ED数码管显示20mA的电流信号在测量的过程中通过独立键盘进行设置测量的上下限当输入的压力超出上下限时蜂鸣器启动报警 本设计的最终结果是/D转换单片机数据处理后LED数码管将显示不同的数值 关键词：压力；ATC89C51；A/D转换，压力传感器；LED显示 ABSTRACT With the requirement of signal detection and processing in industrial application increasing, the new intelligent instrument will play an increasingly important position in the production process. Pressure, as one of the important industrial process parameters, to achieve accurate detection and control of their production process is the necessary condition to ensure the safety of operation and the equipment. Precise pressure measurement and transmission ensure product quality, enhance effective protection benefits. Therefore, intelligent pressure detection system has a very important significance in industrial processes. The design is based on measurement and display of AT89C51 single-chip. This is the pressure sensors will convert the pressure into electrical signals. After using operational amplifier, the signal is amplified, and transferred to the 8-bit A/D converter. Then the analog signal is converted into digital signals which can be identified by single-chip and then converted by single-chip into the information which can be displayed on LED monitor, and finally display output. In the course of show, through the keyboard to input all kinds of data and commands into the computer, the single-chip will locate in a predetermined function step to display required values. The end result of this design is that by downloading software to the hardware, it will get the data which is required to display by debugging. When the input analog signals change, the LED monitor will display different values through the A/D converting. Key words: pressure; ATC89C51; A/D converter; pressure sensor; LED monitor;