前言国内现行的混凝土内部原型观测所用仪器,目前主要还是差动电阻式,自56年以来,20多年期间,全国使用着的仪器大约有十万台支,查明仪器历史上测值中的误差大小及产生误差的原因,以便正确使用测量资料及提高仪器的制造、使用水平,因此,研究所制订了这一研究专题。原型观测中存在的问题有各种各样,就整个测量装置说来,普遍的较为严重的问题是两个。 Preface The current domestic instruments used in the internal prototype observation of concrete, the current main or differential resistance type, since 56 years, more than 20 years, the national use of the instrument has about 100,000 units to identify the history of the instrument measurement error Size and cause of error in order to correctly use the measurement data and improve the manufacture of equipment, the level of use, therefore, the Institute developed this research topic. There are a variety of problems in prototyping, and for the entire measurement device, two of the more serious problems are common.