Abstract: Differential resistance sensors are widely used to observe the stress, strain and temperature of structures in hydraulic and hydropower projects． The life－spans of structures are long, while the performance of insulated resistance in differential resistance sensors are worse as time goes by, therefore, the issue of influence of the worse performance of insulated resistance on measuring value need evaluation.By test with aquatic simulative resistance, this paper discussed this issue, for reference．

摘要： 水电工程中，大量使用差动电阻式传感器来监测水工建筑物的应力应变及温度，由于水工建筑物的使用寿命很长，而差动电阻式传感器的绝缘电阻会随时间逐步降低，因此差动电阻式传感器的绝缘电阻降低到什么程度才会影响传感器的测值是个需要研究的问题。本文利用模拟水电阻使差动电阻式传感器的绝缘电阻降低并讨论绝缘电阻下降后对传感器的测量结果的影响。