Method and system for correcting the position in the plane of the rail axis of ultrasonic transducers of mobile measuring and control devices

Abstract

The subject of the application is a method and system for correcting the position of ultrasonic transducers of mobile measuring and control devices in the rail axis plane. The method consists of stages in which: a measuring vehicle equipped with an ultrasonic flaw detector (U) connected to a set of transducers (3, 4, 5) located on the tested railway rail (1) in its vertical axis is set in motion, then by means of the main transducer (3), ultrasonic waves (2) are emitted passing through the head, neck and foot of the railway rail (1) and the reflected echo is received, periodically repeating the cycles of wave emission and reception of the reflected echo; then by means of the left setting transducer (4) and the right setting transducer (5) located on both sides of the main transducer (3), ultrasonic waves (2) are emitted passing through the head and neck of the rail (1) and the reflected echo is received,by periodically repeating the cycles of wave emission and reflected echo reception; then, from the transducers (3, 4, 5), target signals (Sd1, Sd2, Sd3) and optionally error signals are sent to the computer (C), which compares the values ​​of the target signals (Sd1, Sd2, Sd3) and error signals, based on which the value and direction of correction are determined. Information about the value and direction of correction is then transmitted to the executive module (D) connected to the correcting drive (K), which corrects the position of the transducer assembly (3, 4, 5) in the vertical plane of the railway rail (1) by the determined value. The system includes an ultrasonic flaw detector (U) connected to a set of transducers (3, 4, 5) located on the tested railway rail (1) in its vertical axis. Ultrasonic waves (2) emitted by the main transducer (3) pass through the head, neck, and foot of the railway rail (1). The waves emitted by the setting transducers (3,4) pass through the head and neck of the rail (1). The transducer assembly (3, 4, 5) is connected to the suspension (Z) and to the ultrasonic flaw detector (U) connected to the computer (C), which is connected to the executive module (D). The executive module (D) is connected to the corrective drive (K) attached to the chassis (B) of the measuring vehicle, connected to the transducer assembly (3, 4, 5). The suspension (Z) is attached to the chassis (B) and allows perpendicular displacement relative to the axis of the tested railway rail (1).,

Images