基于ADuC824单片机的数字式压力变送器设计  

Design of Digital Pressure Transmitter Based on ADuC824 MCU

作　　者：杭和平[1] 杨芳[1] 宋娟[1] 

机构地区：[1]北京联合大学生物化学工程学院,北京100023

出　　处：《机械与电子》2007年第8期37-40,共4页Machinery & Electronics

摘　　要：介绍了基于ADuC824的数字式压力变送器的设计原理。利用ADuC824单片机内部集成的增益可调放大器和24位的A/D转换器,直接对压力传感器的输出电压信号进行放大和A/D转换。在单片机中计算压力值,并进行数字补偿,经RS485接口输出,具有稳定性好、误差小、测量精度高等特点。由于ADuC824对功能的高度集成,简化了系统的硬件和软件设计。The design of digital pressure transmitter based on microcontroller ADuC824 is introduced. The pressure sensor＇s output voltage directly inputs to PGA for amplification and then to 24 bits ＇ A/D converter both integrated in ADuC824. The converted data is calibrated, and then pressure reading is calculated by ADuC824. The pressure reading have characteristic of small deviation, excellent value precision, good stability and can communication with master computer through RS485 interface. Because of the high integration of ADuC824 MCU,the design of hardware and software is simplified greatly.

关 键 词：ADUC824 数字式变送器 压力变送器 RS485接口 

分 类 号：TP272[自动化与计算机技术—检测技术与自动化装置]