UT – Comparison SDH – FBH : Amplitude analysis

MONO-ELEMENT CONTACT  probe 2.25 MHZ, Ø6.35 MM

For the Ø6.35 mm contact probe at 2.25 MHz, the SV45° mode is used for inspection. The input signal frequency is 2.25 MHz, with 44% bandwidth and 147° phase.

The acoustic focusing depth is 3 mm, deduced from the simulated beam as illustrated below.

 

 

The results are calibrated versus the Ø3 mm FBH at 30 mm depth.

 

 

MONO-ELEMENT CONTACT probe 2.25 MHZ, Ø12.7 MM, P45°

For the Ø12.7 mm contact probe at 2.25 MHz, the P45° mode is used for inspection. The input signal frequency is 2.25 MHz, with 50% bandwidth and 280° phase.

The acoustic focusing depth is 8 mm, deduced from the simulated beam as illustrated below.

 

 

The results are calibrated versus the Ø3 mm FBH at 30 mm depth.

 

 

MONO-ELEMENT CONTACT probe 2.25 MHZ, Ø12.7 MM, SV 45°

For the Ø12.7 mm contact probe at 2 MHz, the SV45° mode is used for inspection. The input signal is the inverse P45° experimental direct specular echo of a Ø3 mm FBH, tilt 45° at 30 mm depth.

The acoustic focusing depth is 17 mm, deduced from the simulated beam as illustrated below.

 

 

The results are calibrated versus the Ø3 mm FBH at 30 mm depth.

 

 

Phased-array CONTACT probe of 20 elements with 0.7 mm ptich

For the phased array contact probe of 20 active elements (out of 48) with 0.7 mm pitch at 5 MHz, the P45° mode is used for inspection. The focal law is a P45° beam steering.

The acoustic focusing depth is 20 mm, deduced from the simulated beam as illustrated below.

 

 

The results are calibrated versus the Ø3 mm FBH at 30 mm depth.

 

 

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