超低功耗水质pH检测仪设计  

Design of Ultra-low-power Water pH Detector

作　　者：祁建广[1] 李宝营[1] 李仁庆[1] 

机构地区：[1]大连工业大学信息科学与工程学院,辽宁大连116034

出　　处：《仪表技术与传感器》2017年第3期118-120,126,共4页Instrument Technique and Sensor

基　　金：2016年辽宁省普通高等教育本科教学改革立项项目(81600413)

摘　　要：针对目前pH检测仪体积大,检测精度低、成本高等问题,文中设计了基于超低功耗单片机的pH检测仪。硬件电路分为pH值采集、温度采集、显示、通信及其电源组成,软件部分实现pH值在线温度补偿,MODBUS通信及其2,3点标定等功能,并开发了相应的标定监控软件实现在线仪表的标定和pH值监测,通过标准溶液测量实验可知该检测仪具有测量精度高、超低功耗、体积小等功能。In view of the large size and low detection accuracy and high cost of the current pH detector,a pH detector was designed based on ultra low power microcontroller.Hardware circuit was composed of acquisition of pH value,temperature acquisition,display,communication and power supply.The software realized pH value online temperature compensation,MODBUS communication and the second and three point calibration function,and the corresponding monitoring and calibration software was developed to realize on-line instrument calibration and pH monitoring.The detection instrument has functions of high measuring accuracy and ultra low power consumption,small size and other functions through the standard solution measurement.

关 键 词：PH值 温度补偿 MODBUS通信 在线标定 

分 类 号：TP368[自动化与计算机技术—计算机系统结构]