Measuring and testing – Vibration – By mechanical waves
Reexamination Certificate
2005-09-20
2005-09-20
Williams, Hezron (Department: 2856)
Measuring and testing
Vibration
By mechanical waves
C073S655000, C073S656000, C073S657000
Reexamination Certificate
active
06945114
ABSTRACT:
Formed Laser Sources (FLS) using pulsed laser light for generation of ultrasonic stress waves are combined with air-coupled detection of ultrasound to provide for the hybrid non-contact, dynamic and remote ultrasonic testing of structural materials, especially railroad tracks. Using this hybrid technique, multimode and controlled frequency and wavefront surface acoustic waves, plate waves, guided waves, and bulk waves are generated to propagate on and within the rail tracks. The non-contact, remote nature of this methodology enables high-speed, fill access inspections of rail tracks. The flexibility and remote nature of this methodology makes possible the detection of critical cracks that are not easy, or impossible to detect, with current inspection techniques available to the railroad industry.
REFERENCES:
patent: 4004455 (1977-01-01), McKee
patent: 4144767 (1979-03-01), Kaule et al.
patent: 4174636 (1979-11-01), Pagano
patent: 4235112 (1980-11-01), Kaiser
patent: 4512197 (1985-04-01), von Gutfeld et al.
patent: 4541280 (1985-09-01), Cielo et al.
patent: 4593569 (1986-06-01), Joy
patent: 4926692 (1990-05-01), Brokowski et al.
patent: 5257544 (1993-11-01), Khuri-Yakub et al.
patent: 5419196 (1995-05-01), Havria
patent: 5505090 (1996-04-01), Webster
patent: 5574224 (1996-11-01), Jaeggi
patent: 5636026 (1997-06-01), Mian et al.
patent: 5698787 (1997-12-01), Parzuchowski et al.
patent: 5801312 (1998-09-01), Lorraine et al.
patent: 5824908 (1998-10-01), Schindel et al.
patent: 5970438 (1999-10-01), Clark et al.
patent: 6041020 (2000-03-01), Caron
patent: 6055862 (2000-05-01), Martens
patent: 6324912 (2001-12-01), Wooh
patent: 6335943 (2002-01-01), Lorraine et al.
patent: 6360609 (2002-03-01), Wooh
patent: 6378387 (2002-04-01), Froom
patent: 2002/0108445 (2002-08-01), Wooh
Kenderian, Djordjevic and Green, “Laser-Based and Air Coupled Ultrasound as Noncontact and Remote Techniques for Testing Railroad Tracks,”Materials Evaluation, vol. 60(1), Jan. 2002, pp. 65-70.
Kenderian, Djordjevic and Green, “Point and Line Source Laser Generation of Ultrasound for Inspection of Internal and Surface Flaws in Rail and Structural Materials,”Research in Nondestructive Evaluation, vol. 13(4), Dec. 2001, pp. 189-200.
Kenderian and Djordjevic, “Narrowband Laser-Generated Surface Acoustic Waves Using A Formed Source In The Ablative Regime,”Journal of Acoustical Society of America, to be published, Spring 2003.
Di Scalea, Kenderian & Green, Non-Contact Ultrasonic Inspection of Railroad Tracks, 45thInternational SAMPE Symposium, San Diego, CA, May 21-25, 2000.
Kenderian, Djordjevic and Green, Laser-Air Hybrid Ultrasonic Technique for the Inspection of Verical Cracks in Rails, 11thInter. Symp. Nondestr. Char. Mater.—Berlin, Germany, Jun. 24-28,2002.
Cerniglia, Kenderian, Djordjevic, Garcia & Morgan, “Laser and Air-Coupled Transducer For Non-contact Ultrasonic Inspection In the Railroad Industry,” AIPnD Conf., Spring 2003.
Kautz, “noncontact Determination of Antisymmetric Plarte Wave Velocity In Ceramic Matrix Composite,”Res. Nondestr. Eval., (1997) pp. 137-146.
Baldwin, Berndt & Ehrlich, “narrowband Laser Generaation/Air-Coupled Detection: UltrasonicSystem For On-line Process Control of Composites,” “Ultrasonics,” 37, pp. 329-334 (1999).
Cerniglia Donatella
Djordjevic B. Boro
Green, Jr. Robert E.
Kenderian Shant
Guffey Larry J.
Miller Rose M.
The Johns Hopkins University
Williams Hezron
LandOfFree
Laser-air, hybrid, ultrasonic testing of railroad tracks does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Laser-air, hybrid, ultrasonic testing of railroad tracks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laser-air, hybrid, ultrasonic testing of railroad tracks will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3419382