YS—1型水平垂直位移计为一观测坝体内部水平与垂直位移(沉降)的仪器。该仪器在我国还是首次研制成功。本文较详细、系统地论述了它的基本原理、结构设计特点、率定方法、性能指标、现场埋设原则等。通过室内的装配率定检验表明,该仪器的性能良好,达到设计要求,即将用于实际工程上。 YS-1-type horizontal and vertical displacement meter as a horizontal and vertical displacement of the dam body observation (settlement) of the instrument. The instrument was first developed in our country. This article discusses in more detail and systematically its basic principles, structural design features, calibration methods, performance indicators, and the principle of on-site embedding. Through indoor assembly rate test shows that the performance of the instrument is good, to meet the design requirements, to be used on the actual project.