What are the advantages of phased array ultrasonic flaw detection over ordinary ultrasonic flaw detection?

The principle of ultrasonic phased array is similar to that of conventional ultrasonic testing, both of which are based on the principle of pulse reflection. Therefore, phased array also has the advantages of conventional ultrasonic testing.

If phased array has the same advantages as conventional ultrasound, there is no need to develop phased array. Therefore, phased array has many advantages over traditional ultrasound.

(1) phased array adopts S-scan, that is, it can have ultrasonic waves with multiple angles at the same time, which is equivalent to probes with multiple angles working at the same time, so phased array does not need sawtooth scanning, only needs to move the probe along the weld, and the detection efficiency is higher. Suitable for automatic production and mass production.

(2) Phased array can have focusing function, but conventional ultrasonic wave generally does not (except focusing probe), so the sensitivity and resolution of phased array detection are higher than that of conventional ultrasonic wave detection.

(3) Phased array detection can have B-scan, D-scan, S-scan and C-scan at the same time, and a three-dimensional graph can be established through modeling. Defect display is very intuitive, even people who don't know nondestructive testing can understand it, while conventional ultrasonic can only distinguish defects through waveforms.

(4) Ultrasonic phased array can detect complex workpieces, such as blade roots of turbine blades. Conventional ultrasonic detection has a large blind area due to the single beam angle of the probe, which leads to missed detection. The phased array can be detected quickly and intuitively.