Total Focusing Method in Ultrasonics
Ultrasonic Total Focusing Method is a precise phased array technique that superimposes signals from all transmitter-receiver combinations to achieve maximum resolution and sensitivity. It is used for detailed inspections of workpieces.
Physico-chemical mechanism of action
The ultrasonic total focusing method uses phased array technology, where multiple ultrasonic transducers are arranged in an array. Each transducer emits ultrasonic waves that converge at a specific point in the workpiece and create a strong reflection. By superimposing all transmit-receive combinations, maximum resolution is achieved.
Metallurgical relevance & risks during welding
This method is especially useful for inspecting weld areas because it can detect fine structures and surface flaws with high precision. It reduces the risk of hidden defects and improves workpiece safety. However, an error in evaluation or in setting the transducers can lead to misinformation, which can lead to wrong decisions.
Workshop practice & operational instructions
To use the ultrasonic total focusing method effectively, the following steps must be observed:
1. Calibrating the transducers: Make sure all transducers are correctly calibrated and their alignment is precise.
2. Optimizing overlay parameters: Adjust the overlay time and phase shift offset to the specific conditions of the inspection object.
3. Performing the inspection: Move the transducer array over the area to be inspected and collect the signals.
4. Evaluating the data: Use special software to analyze the superimposed signals and identify defects.