基于USB接口的在线pH值监测系统  

Design of Online pH Monitoring System Based on USB Interface

作　　者：张坤[1] 薛文玲[2] 李志林[3] 王振朝[2] 

机构地区：[1]河北大学工商学院,河北保定071002 [2]河北大学电子信息工程学院,河北保定071002 [3]河北大学化学与环境科学学院,河北保定071002

出　　处：《仪表技术与传感器》2013年第7期64-66,70,共4页Instrument Technique and Sensor

基　　金：河北大学科研基金资助项目(2010Q18)

摘　　要：为了满足实时性和数据重现性的要求,开发了基于USB接口的在线pH值监测系统。系统以C8051F340单片机为主控芯片,采用玻璃电极检测溶液的pH值,铂金ORP电极检测氧化还原电位,利用温度传感器DS18B20采集溶液温度,通过软件计算实现对pH值的温度补偿。以C8051F340内嵌的USB控制器,结合USBXpress开发工具实现与PC机的数据通信,实现对pH值的在线监测。实验数据表明:系统具有良好的实时性、重现性和稳定性。In order to meet the requirements of real-time and the data reproducibility, an online pH monitoring system based on USB interface was developed. The C8051F340 is the system control core. The pH value and the redox potential of solution were de- tected by glass electrode and Platinum ORP electrode, respectively. The temperature compensation of pH measurement was realized by the temperature sensor DS18B20. The data communication between the PC and the USB controller embedded C8051 F340 based on the development tools of the USBXpress. The experimental data show that the system has good real-time, stability and reproducibility.

关 键 词：PH值 C8051F340 USB 温度补偿 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]