基于ARM7微控制器的自清洁pH电极设计  

Design of Self- cleaning pH Electrode Base on ARM7 Microcontroller

作　　者：杨小天[1,2] 刘国龙[1] 

机构地区：[1]吉林建筑大学电气与电子信息工程学院,长春130118 [2]吉林省建筑电气综合节能重点实验室,长春130118

出　　处：《吉林建筑大学学报》2015年第6期59-62,共4页Journal of Jilin Jianzhu University

摘　　要：本文在现有的水质分析传感器技术基础上,结合新型的ARM7微控制器,设计了一种自清洁pH电极.硬件电路以LPC2138为控制核心,应用16位的A/D转换器ADS8320,对传感器信号进行高精度采集与转换.应用PWM控制步进电机雨刷,对pH电极进行清洁.具有交直流电源自动切换电路,可实现在多种环境下的pH值和温度的在线测量.In this paper, based on existing water quality analysis sensor technology, combined with the new ARM7 microcontroller, designed a self- cleaning p H electrode. In hardware, LPC2138 is the core controller, the design applied 16 bit A / D converter ADS8320 to achieve high- precision signal acquisition and conversion. And use PWM pulse to control stepper motor wiper for the self- cleaning of p H electrode. It has AC- DC power supply automatic switching circuit. It can be implemented in a variety of environments on- line measurement of p H and temperature.

关 键 词：自清洁pH电极 LPC2138 PWM控制 PH测量 温度测量 

分 类 号：TP21[自动化与计算机技术—检测技术与自动化装置]