Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Reexamination Certificate
2008-04-01
2011-10-25
Nghiem, Michael (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Mechanical measurement system
C073S577000
Reexamination Certificate
active
08046177
ABSTRACT:
Detection of damage in armor structures, using networks of piezoelectric transducers. In particular, piezoelectric transducers can be placed at various points on the armor structure, effectively creating a number of paths between pairs of transducers. Each of these paths can be queried by transmitting an ultrasonic stress wave from one transducer to the other, and analyzing changes in the stress wave. The signal from the received stress wave can be time gated to remove crosstalk, and the resulting time gated signal can be analyzed for characteristics of damage. For instance, if the time gated signal is sufficiently attenuated, it can be determined that the armor structure has sustained damage to at least that region traversed by this particular path.
REFERENCES:
patent: 7180302 (2007-02-01), Kelsey et al.
patent: 7596078 (2009-09-01), Beard et al.
patent: 2006/0042396 (2006-03-01), Qing et al.
patent: 2006/0079747 (2006-04-01), Beard et al.
patent: 2006/0283266 (2006-12-01), Qing et al.
patent: 2007/0018083 (2007-01-01), Kumar et al.
patent: 2009/0326834 (2009-12-01), Sundaresan et al.
Godinez-Azcuaga et al., Acoustic Techniques for the Inspection of Ballistic Protective Inserts in Personnel Armor, Sep./Oct. 2003, Sample Journal, pp. 1-8.
Giurgiutiu et al., Embedded Non-Destructive Evaluation for Structural Health Monitoring, Damage Detection, and Failure Prevention, Mar. 2005, The Shock and Vibration Digest, vol. 37, No. 2, pp. 83-105.
Shawn J. Beard, Amrita Kumar, Peter X. Qing, David C. Zhang & Joel Patterson, “A Smart Patch System for Monitoring of Bonded Reparis”, International Workshop of Structural Health Monitoring 2005, Stanford University, 11 pp.
Xinlin P. Qing, Shawn J. Beard, Amrita Kumar & Robert Hannum, A real-time active smart patch system for monitoring the integrity of bonded repair on an aircraft structure, Institute of Physics Publishing, Smart Materials and Structures, Smart Mater. Struct. 15 (1006) N660N73, 2006 IOP Publishing Ltd, Printed in the UK.
Chang Fu-Kuo
Li Irene
Liu Bao
Acellent Technologies, Inc.
Innovation Counsel LLP
Le Toan
Nghiem Michael
LandOfFree
Method and apparatus for detecting damage in armor structures does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for detecting damage in armor structures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting damage in armor structures will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4287367