Abstract: A sensor carrier for an in-tube inspection scraper has setting places for installation of monitoring sensors responsive to any diagnostic parameters of a pipeline being inspected. The carrier includes a set of kinematically interconnected sensor supports that are subjected to an elastic force in the radial direction from the carrier axis. The supports are made as elastic ring-shaped elements or as rows of interconnected elements adjoining the pipe wall or are fixed on elastic components such as rings or sectors of sleeves, and/or are connected to a housing capable of bending. Installed on the supports between the sensors and the internal surface of the pipeline are elastic gaskets. The carrier allows one to increase the efficiency of the flaw detection in pipelines having defects of geometry in the cross section.

Abstract: A sensor carrier for an in-tube inspection scraper has setting places for installation of monitoring sensors responsive to any diagnostic parameters of a pipeline being inspected. The carrier includes a set of kinematically interconnected sensor supports that are subjected to an elastic force in the radial direction from the carrier axis. The supports are made as elastic ring-shaped elements or as rows of interconnected elements adjoining the pipe wall or are fixed on elastic components such as rings or sectors of sleeves, and/or are connected to a housing capable of bending. Installed on the supports between the sensors and the internal surface of the pipeline are elastic gaskets. The carrier allows one to increase the efficiency of the flaw detection in pipelines having defects of geometry in the cross section.

Abstract: A method of in-tube ultrasonic inspection of pipelines is carried out by passing inside the pipeline a scanning pig, emitting ultrasonic probing pulses towards the pipe wall and receiving the reflected ultrasonic pulses. The received pulses are amplified using an amplification factor which is increased depending on the time elapsed from the moment of emitting the probing pulse. The threshold values of the pulse amplitudes are also varied depending on time. Digital values of the pulse amplitudes and the time elapsed from the moment of emitting the probing pulse and corresponding to each value of the amplitude are obtained. The method allows for compensation for the effect of ultrasound attenuation in the material on the amplitudes of the reflected pulses and, in this manner, to increase the accuracy of determining the geometrical parameters of the flaws, a probability of their detection and efficiency of estimation of their danger.