Abstract
The article deals with the problem of analyzing existing approaches to the survey of construction sites. It is given an explanation of the relevance of the study of objects by non-destructive diagnostic methods. In practice, the use of one of the methods of non-destructive testing of construction objects - the ultrasonic method is shown. The mathematical approach to solving the problems is also described in the article, which presents the basic formulas used in solving the problem. Authors also characterized the available non-destructive testing devices and their technical characteristics. The results and algorithms of various methods for solving the problem are presented. An experimental study is described using one of the considered devices. The process of preparation for measurements and installation of sensors is described in detail. There were given the results of experimental studies in laboratory conditions and on the construction site. According to the results of the experiments, conclusions were made for each of them.