一、前言在我国许多水电工程的大坝中均埋设有大批差动电阻式(卡尔逊式)仪器,构成一套比较完整的内部观测系统,这对于指导施工、监视运行、保证安全,以及检验和改进设计方法等方面,都具有重要的意义。但是,由于过去对这种系统一直采用水工比例电桥和人工检 I. Preface A large number of differential resistive (Carlson-type) instruments are embedded in many hydropower projects in our country to form a relatively complete internal observation system. This is of great importance for guiding construction and monitoring operations, ensuring safety and testing And improve the design methods, etc., are of great significance. However, since hydraulic proportional bridges and manual inspection of such systems have been used in the past