Abstract: The method of monitoring the state of an extended line is based on using an extended line (4) of transmission of wave energy as a distributed responsive element and a channel for transmission of data on varying geometry of the surface of an extended shell (1). With the surface area of the shell (1) divided into elementary portions (2) of an arbitrary shape, of an area either equal to or smaller than the area of the predetermined resolution of the monitoring procedure, the extended line (4) of transmission of wave energy positioned and secured along the respective perimeters of the defined elementary portions (2), and the distribution of the curvature of the surface along the axis of said line (4) measured in an appropriate manner, there are obtained the values of the two major curvatures of the surface of each defined elementary portion (2). By analyzing variations of the major curvature values, there are determined the characteristics of the strained and deformed state of the shell (1).

Abstract: The method of monitoring the state of an elongated object resides in the synthesis of the characteristics of an extended line (3) of transmission of wave energy, providing for employing said line (3) as a space-distributed responsive element and also as the channel transmitting information on variation of a monitored parameter of an elongated object (1). By situating said line (3) in the zone of monitoring the elongated object (1), shaping in said line (3) a reference signal of a predetermined space- and time-related pattern, and obtaining a measurement signal, the processing of these signals yields continuous distribution of the monitored parameter and a capacity of evaluating the state of the elongated object (1).