Method of ultrasonic flaw detection inspection with differential compensation of disturbance factors

摘要

A method of ultrasound inspection with differential compensation of the effects of interfering factors relates to means for defectoscopic inspection. The method involves forming a first measurement channel and a second measurement channel for a shadow inspection method. Both channels have identical electronic/acoustic path characteristics. A system of defectoscope converters is brought to motion and the entity being inspected is acoustically analyzed. The second measurement channel is shifted in space, relative to the first channel, along the axis of motion. The processing of signals from channel outputs involves obtaining a differential signal thereof. The defectoscope contains pairs of an ultrasound generator/receiver and a data processing device. Outputs of the receivers are connected to an input of the data processing device. The generators and the receivers are positioned in a row along a single line. The data processing device is capable of obtaining a differential signal. The present invention increases the ability of a defectoscope to be selective with regard to controllable defects in the process of scanning. The present invention decreases the number of false positives in the process of high-speed ultrasonic inspection, while maintaining high defectoscope sensitivity.