基于PIC18F2520的极谱式溶解氧传感器设计

摘要

采用覆膜极谱式溶解氧测量工作原理,以PIC18F2520为核心控制器设计了一种溶解氧传感器,并对传感器的温度、压力及盐度补偿算法进行了研究。试验证明,该设计结构简单、性能稳定,温度测量精度误差为±0.3℃,溶解氧测量精度误差为±0.07 mg/L。%We designed a dissolved oxygen sensor with the principle of polarographic dissolved oxygen and PIC18F2520 as a core controller.We also addressed the compensation algorithm of a DO sensor in temperature,pressure and salinity.Experiments show that a DO sensor has such advantages of simple structure and stable performance,temperature accuracy of ±0.3 ℃ and DO accuracy of ±0.07 mg/L.