MIRA is based on the ultrasonic pitch-catch method and uses an antenna composed of an array of dry point contact (DPC) transducers, which emit shear waves into the concrete. The 4 by 12 transducer array is under computer control and the recorded data are analyzed to create a 2-D image of the reflecting interfaces within the cross section below the antenna. The series of 2-D images obtained from a 2- dimensional surface scan of the test object are transferred to a computer with IntroView imaging software. The software assembles the 2-D slices into a complete 3-D image of the test object. The 3-D image can then be manipulated for interpretation of test results. 

Ultrasonic pulse-echo tomographer, flaw detector.

• Thickness measurement
• Detection of voids and honeycombing in concrete elements
• Detection of voids in grouted tendon ducts
• Detection of poor-quality bond in overlays and repairs
• Detection of delaminations
• Detection of lack of support behind tunnel linings and below slabs on grade.

• Integrated 5.7” TFT color screen. 
• Low frequency, broadband, dry point contact shear-wave transducers with wear-resistant ceramic tips 
• Spring loaded 4 x 12 transducers in the antenna array
• 10 to 100 kHz working frequency range
• Nominal frequency converter = 50 kHz
• Ultrasound speed range: 1,000 to 10,000 m/s
• Dimensions: 370 × 150 × 145 mm (without handles)
• Weight: 4.5 kg 
• Testing depth: 40 to 2,000 mm (depending on the concrete quality, member’s lateral dimensions and amount of reinforcement)
• 7 Gb flash memory
• USB 2.0 interface
• 11.2 V rechargeable battery, 5 h operating life
• Protection class IP54
• IntroView software for 3-D tomographic display
• Operating conditions: -10 °C to 50 °C, < 95% RH
• Error of the depth of a defect, mm, where H is the measured depth = ± (0.05 ∙ H + 10)

MIRA (MIR-1000) Tomographer

Ultrasonic pulse-echo tomographer.

• Technical data-sheet 
• Publications

More documentation is available upon request.

No standards available for this NDT system.