1 / 22

Ultrasound

Ultrasound. presented by BAM. Equipment BAM. Power supply Waveform generator (any arbitrary of pulse forms) Power Amplifier Oscilloscope Computer. Measurements Overview. Measurement - Historic Masonry. „Kirche am Anger“ Potsdam-Babelsberg Brandenburg / Germany.

blaze-winters
Download Presentation

Ultrasound

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Ultrasound presented by BAM

  2. Equipment BAM • Power supply • Waveform generator (any arbitrary of pulse forms) • Power Amplifier • Oscilloscope • Computer

  3. Measurements Overview

  4. Measurement - Historic Masonry „Kirche am Anger“ Potsdam-Babelsberg Brandenburg / Germany Year of construction: 1850-52 By: Ch. H. Ziller

  5. Transducers A1220 array with transversal transducers (no coupling agent required) 12 Transmitters Polarisation of waves 12 Receivers

  6. Result measurement – Historic Masonry Position [cm] 4 8 12 16 20 40 60 80 100 0 Represents the depth of 118 mm 100 200 Depth [mm] 300 400 500 600 700

  7. Measurements Overview

  8. Specimen Brickwork 25 cm Specimen Homogeneous brickwork Used for Selection of optimal transducers

  9. Transducers A1220 A1220 array with transversal transducers (no coupling agent required) 12 Transmitter Polarisation of waves 12 Receiver

  10. Results: Only the first row of bricks was detectable with the A1220 The system seems not to be suitable for masonry investigation

  11. Measurements Overview

  12. Specimen Brickwork 25 cm Specimen Homogeneous brickwork Used for Selection of optimal transducers

  13. Transducers planar and exponential Broad band (planar) transducer (coupling agent: glycerine) G 0,1 R and G 0,2 R nominal Frequency: 80 to 250 kHz Narrow band transducer (point contact, exponential horn) nominal Frequency: 50 and 100 kHz

  14. Results specimen 25cm (G 0,2 GC) Intensity a.u. t Time [µs] Intensity a.u. t Time [µs]

  15. Measurements Overview

  16. Specimen Brickwork 49 cm Measuring line 0-70cm Specimen Brickwork with voids used for tomography Location of voids

  17. Transducersplanar and exponential Broad band (planar) transducer (coupling agent: glycerine) G 0,1 R and G 0,2 R nominal Frequency: 80 to 250 kHz Narrow band transducer (point contact, exponential horn) nominal Frequency: 50 and 100 kHz

  18. Aperture Angle Intensity of transmitted signal related to the aperture angle (Broad band transducer)

  19. Measurements Overview

  20. Measurements tomography 1 Intensity a.u. t Time [µs] DATA FOR TOMOGRAPHY Measurement – time of flight (Broad band transducer G0,2R) Signal No 3 and 32 Intensity a.u. t Time [µs]

  21. Measurements tomography 2 Intensity a.u. t Time [µs] DATA FOR TOMOGRAPHY Measurement – time of flight (Narrow band transducer exponential horn) Signal No 1 and 21 Intensity a.u. t(?) Time [µs]

  22. The END BAM at work

More Related