METHOD AND DEVICE FOR DETERMINING AN ORIENTATION OF A DEFECT PRESENT WITHIN A MECHANICAL COMPONENT

摘要

A technique is provided for determining an orientation of a defect present within a mechanical component using at least one ultrasonic head that applies ultrasonic signals to the mechanical component starting from various measurement points. Echo ultrasonic signals reflected by a point to be analyzed present within the component back to the measurement points are received by the same or a different ultrasonic head. A data processing unit analyzes the received echo ultrasonic signals as a function of a sound emission direction between each measurement ping and the point to be analyzed for determining the orientation of the defect. A distance between the measurement point and the point to be analyzed is calculated for every measurement point as a function of a signal propagation time between the point in time of emitting the ultrasonic signal and the point in time of receiving the echo ultrasonic signal reflected by a defect.

主权项

1. A method for determining an orientation of a defect present within a mechanical component, comprising:
applying ultrasonic signals emitted from various measuring points to the mechanical component, wherein the ultrasonic signals are generated by at least one ultrasonic head which applies an ultrasonic signal to the component at each of the measuring points, wherein an echo ultrasonic signal thereby generated is received temporally offset by said ultrasonic head or a different ultrasonic head in each case; and calculating an angular characteristic of the received echo ultrasonic signals depending on a sound emission direction between the respective measuring point and the point to be investigated, wherein the angular characteristic gives a dependency of the signal amplitude on the sound emission direction, wherein, depending on a detected signal propagation time between the time point of emission of the ultrasonic signal and the time point of reception of the reflected echo ultrasonic signal for each measuring point, a distance between the measuring point and the points under investigation is calculated and the echo ultrasonic signals from the points under investigation and received temporally offset at the different measuring points are added together in phase for the analysis thereof, and wherein the phase characteristic is analyzed to statistically determine the orientation of the defect.