双极性电压脉冲激励的智能电导率测量仪

摘要

An intelligent conductometer based on bipolar pulse voltage technology has been designed. The instrument eliminates the polarization effect of the media under weak DC excitation, also avoids the complicated processing sections of amplifying, filtering and signal conditioning under traditional AC excitation and simplifies the structure of circuitry. The result of experimental test shows that the conductometer features automatic temperature compensation, automatic range switchover, high accuracy and fast speed detection; the relative measuring error is less than 5 ％.%基于双极性脉冲电压技术,设计了一种智能电导测量仪.该测量仪不仅能够削弱直流激励模式下介质的极化现象,而且避免了传统交流激励模式下所必须的放大、滤波和信号调理等复杂处理环节,简化了电路结构.此电导率测试结果表明,测量仪具有温度自动补偿、量程自动转换、测量精度高和检测速度快的特点,其测量相对误差小于5%.