MRUT Techniques from Innerspec Technologies

MRUT-Lamb

The MRUT-Lamb technique is a guided waves technique that uses Lamb waves to generate ultrasonic scans. The Lamb waves are generated with EMAT Lorentz force. The MRUT-Lamb technique can be used in two different configurations:

  • Pulse-Echo Mode: A single sensor transmits and receives the ultrasonic signal. The sensor will detect reflections from defects along the material.
  • Pitch-Catch Mode: Two sensors configuration – one sensor transmits, while the other receives the ultrasonic signal. Defects along the material will cause time-of-flight (TOF) shifts and decrease in amplitude.
MRUT-Lamb – Inspection with Pulse-Echo Mode

Figure 4: MRUT-Lamb – Inspection with Pulse-Echo Mode

MRUT-Lamb – Inspection with Pitch-Catch Mode

Figure 5: MRUT-Lamb – Inspection with Pitch-Catch Mode

Features of the MRUT-Lamb technique:
• Range | Up to approximately 5 ft. on each side of the sensor.
• Scan Speed | Up to 1” per second.
• Coatings | Inspection of coatings of up to 0.125” (3.0 mm).

MRUT-SH

The MRUT-SH technique is a guided waves technique that uses Shear Horizontal (SH) waves to generate ultrasonic scans. The SH waves are generated with magnetostrictive force, with the application of magnetostrictive strip (MS Strip). As one sensor is utilized for both transmitter and receiver (i.e. Pulse-Echo mode), the sensor will detect reflections from defects along the material.

MRUT-SH – Inspection with Pulse-Echo Mode

Figure 6: MRUT-SH – Inspection with Pulse-Echo Mode

The MRUT-SH technique provides an increase of 30 to 40 dBs in amplitude, as compared to the MRUT-Lamb technique.

Features of the MRUT-SH technique:
• Range | Up to approximately 3 m (~10 ft) on each side of the sensor.
• Scan Speed | Up to 1” per second.
• Coatings | Inspection of coatings of up to 0.030” (0.75 mm).

Check this paper to know more about inspection with MRUT techniques: