Time-of-Flight Evaluation Algorithm
An algorithm for analyzing TOFD signals that converts travel times of scattered ultrasonic waves into depth coordinates and precisely determines crack heights.
Physico-Chemical Mechanism of Action
The diffraction travel time evaluation algorithm uses ultrasonic waves scattered by a defect. The time these waves take to travel from the transmitter to the receiver (travel time) is converted into a depth based on the geometric location of the defect.
Metallurgical Relevance & Welding Risks
This method allows precise determination of crack heights and depths, which is crucial for quality assurance in welded joints. Incorrect interpretation can lead to missed defects, posing risks to component safety.
Workshop Practice & Action Instructions
To use the algorithm effectively, the ultrasonic equipment must be correctly calibrated and TOFD signals carefully recorded. Accurate travel time measurement is essential for reliable conversion into depth coordinates. If necessary, additional test data should be performed to verify the accuracy of the evaluation.