为测定采场(巷道)顶板下沉或岩体内部相对位移(或离层),我们于1964年起研制DY型电阻式位移计。本文就其设计原理、制作工艺、性能试验、审定及现场应用等方面作一简要介绍。构造及原理电阻式位移计是根据滑线电阻原理设计的,在一根φ10×118毫米的黄铜棒土绕制线圈作为测试元件(图1)。利用惠斯登电 In order to determine the roof subsidence of the stope (roadway) or the relative displacement (or separation) within the rock mass, we started to develop the DY-type resistive displacement meter in 1964. This article gives a brief introduction of its design principle, production process, performance test, validation and field applications. Structure and principle Resistance type displacement meter is designed according to the principle of slip resistance. A φ10 × 118 mm brass rod and coil is wound as a test component (Fig. 1). Take advantage of the Wheatden electricity