TISEC delivers Practical Pattern Recognition Workshop for NDT in Montreal, Canada, June 28-30, 2010
TISEC's ASTIA™ Above-ground Storage Tank Inspection and Assessment goes live, March 2010.
Level III UT Training course completed in State College, PA, March 2010.
WINS presents talk on ultrasonic guided wave potential towards helicopter maintenance to Indian Air force, February 2010.
WINS funded by Transportation Research Board to develop Bridge Cable Inspection Technology, February 2010.
Watch video of Wireless Acoustic Emission Sensor Network for Bridge Structural Health Monitoring.
2010 NDT Training Course Schedule is available now!
New look of TISEC's Super ICEPak® web site, November 2009.
Download and try out TISEC's Super ICEPak® today, contact TISEC for a trial key, November 2009.
New Brunswick DOT has awarded TISEC to inspect LRUT bridge cables on 3 cable-stay bridges using new MsS system, November 2009.
WavesInSolids acquires state-of-the-art equipment for enhanced Guided Wave Inspection Services for Pipelines and Bridge Cables, November 2009.
WavesInSolids delivers Acoustic Emission Level III Training Course in Kuala Lumpur, Malaysia, October 5-9, 2009
WavesInSolids is awarded contract with U.S. Department of Energy for developing inspection technology for health monitoring of coal power plant components, August 2009
WavesInSolids presents a paper at NYC Bridge Conference titled "Structural health monitoring using wireless acoustic emission sensor network" in August, 2009
WavesInSolids is awarded contract with NSF for developing inspection technology for Steel Piles, July 2009
WavesInSolids presents "Acoustic emission input to inspection- based bridge maintenance" at theInternational Conference on Fracture & Fatigue in July, 2009
In-service Testing of Composite Cylinders
WINS personnel have performed studies of the behavior of acoustic waves in Type III
composite cylinders. A simple, low-profile ceramic piezoelectric disk was used in this application
and it worked well. Input signal was sent to a transducer located on the top of the cylinder at the
tangent point just inside the dome at one end, and received on the bottom tangent point at the other.
The interaction of the defects in these materials with transmitted ultrasound is complex and the effect on the transmitted wave may alter the waveform in ways other than simple amplitude changes. A significant change in cross-correlation coefficient between signals in undamaged materials and that obtained from a signal transmitted through a notch oriented parallel to the path between two sensors was obtained. A summary of the data obtained from a number of defects is shown in the table below.
| Defect type | Defect size | Frequency (MHz) | Correlation Coefficient |
|---|---|---|---|
| Axial hole | 3.174 mm dia, 4.8 mm deep | 0.19 | 0.83 |
| Axial impact | 20 x 20 mm observable surface damage | 0.19 | 0.44 |
| Axial parallel notch | 25 x 2 x 2 mm | 0.19 | 0.83 |
| Axial perpendicular notch | 25 x 2 x 2 mm | 0.19 | 0.68 |
| Circumferential hole | 3.175 mm dia, 4.8 mm deep | 0.322 | 0.79 |
| Circumferential damage | 20 x 20 mm observable surface damage | 0.322 | 0.69 |
| Circumferential parallel notch | 25 x 2 x 2 mm | 0.322 | 0.93 |
| Circumferential perpendicular notch | 25 x 2 x 2 mm | 0.322 | 0.85 |