基于单片机与BP网络的高精度压力变送器的设计  

A Design of High Smart Pressure Sensor Based on Single Chip Computer and BP Network

作　　者：张建军[1] 李颀[1] 丁明东 庞兴 

机构地区：[1]陕西科技大学电气与信息工程学院,陕西西安710021 [2]西安中星测控有限公司,陕西西安710077

出　　处：《计算机测量与控制》2010年第2期397-400,共4页Computer Measurement &Control

摘　　要：介绍了以超低功耗单片机MSP430为核心的高精度压力变送器的硬件电路设计,针对压力传感器的温度漂移问题分析了用于温度补偿的BP网络算法,通过MSP430对压力传感器工作环境的温度和压力信号采集作为BP网络的训练与检测样本,构造BP网络进行离线训练,将训练好的网络模型利用C语言编程实现单片机控制核心,研究了单片机软件实现方式;结果表明:利用MSP430单片机减少了系统功耗,其丰富外设减少了所设计变送器的体积,利用BP网络算法提高了变送器的精度,并有很好的抑制零点漂移与时漂的能力。The high smart pressure sensor＇s hardware circuit design based on Ultra Low Power MSP430 MCU is introduced. The BP network algorithm in temperature compensation caused by the pressure sensor＇s temperature drift is analyzed, and the collected values of presser sensor＇s temperature and pressure signals with MCU were used in BP network for offline training. The suited network module is expressed by C language program; the software implemented method is analyzed. The result shows that the MSP430 MCU can reduce system power and its rich exterior equipments can reduce the size of pressure sensor, the precision is improved by BP network algorirhm, zero drift and time drift are best controlled.

关 键 词：MSP430单片机 BP网络 压力变送器 温度补偿 

分 类 号：TP36[自动化与计算机技术—计算机系统结构]