Abstract: The authors introduces a bi-directional wire-alignment transducer device newly manufactured by Nanjing Automation Institute of Water Resources and Hydrology for monitoring horizontal and vertical deformation of dam. Its work ing principle,prob-lems in the course of studying, characteristics and technical index are presented as well.?

摘要： 本文介绍新近研制的用于监测大坝水平、垂直方向变形的双向引张线鞋置，以及双向引张线仪的工作原理、研制中的技术难题和该仪器的特点、技术指标。