水产养殖水质pH值智能变送器设计

Design of a smart pH value transducer for measuring aquaculture water quality

针对中国集约化水产养殖急需应用水质自动监测技术的现状,研究一种基于IEEE1451标准的具有即插即用和自校准功能的智能pH变送器。它集成水质参数信号调理技术、变送技术、自校准技术与现场总线技术于一体,采用低功耗、高性能的微控制器MSP430F149,嵌入了IEEE1451协议规范提出的智能传感器模块STIM(Smart Transducer Interface Module)。重点介绍了pH值智能变送器软硬件设计,给出了初步标定实验。该变送器支持在线连续采集pH值和温度探头信号,且具有精度高、使用方便、可靠性好等特点,适合推广与应用。

Automatic monitoring and controlling system is essential for improvement of aquaculture industry.Based on IEEE1451standard,this paper presents a'plug-and-play'pH smart transducer which involved signal processing, self-calibration and Field bus.Using low power and high performance microcontroller MSP430F149,Smart Transducer Interface Module(STIM)based on IEEE1451standard was embedded.The design of software and hardware was described in detail;to establish a calibration parameter,an initial calibration experiment was carried out.Water temperature and pH can be measured on-line by the smart pH transducer.The results indicate that the smart pH transducer is more accurate,reliable and easy to use,which is suitable to spread the application in aquaculture industry.