根据国家建委1976年下达的“混凝土强度和缺陷非破损检验技术”科研课题,1977年,我院开始研制适用于混凝土非破损检验班小型便携式数字JC-2型超声仪。于同年底研制出第一台样机,并进行试用。1978年,同北京市电子仪器三厂协作完成了JC-2型超声仪设计定型。 According to the research project of the “non-breakage inspection technology for concrete strength and defects” issued by the State Construction and Construction Commission in 1976, in 1977, our institute began to develop a small portable digital JC-2 ultrasound system suitable for concrete non-destructive inspection classes. At the end of the same year, the first prototype was developed and tested. In 1978, the design of the JC-2 ultrasound system was completed in collaboration with the Beijing Electronic Equipment Factory.