大坝安全监测技术及自动化监测仪器、系统的发展

（上接本刊２００１年第３期第４页） ｂ．由武汉地震所研制生产的浮子式静力水准仪其原理（见图６）是用差动变压器式位移传感器测量垂直位移，在国内使用较多，是一种测量精度和稳定性较好的仪器。仪器通过浮子上铁芯在传感器的线圈中上下相对移动而测出垂直位移。它要求铁芯在移动过程中相对于线圈架同心，以免铁芯碰传感器壁产生磨擦造成较大测量误差。为此它采用弹性支撑导向结构，结构复杂，维护较困难。 Ｃ．步进马达式静力水准仪的工作原理是步进马达驱动丝杆垂直向上下运动，当丝杆端部与连通管连接的容器中液面接触时停止运动，测…

THE DEVELOPMENT OF SAFETY NOMITORING TECHNOLOGY AND AUTOMATIC SAFETY MONITORING SYSTEMS FOR DAMS

This paper describes the development of safety monitoring technology, automatic safety monitoring devices, and monitoring systems for dams in recent 20 years in China. The principle, features and specifications of the devices and systems are introduced. The features and technical levels of the products of the same type in the world are campared.