System and method for in-situ monitoring of composite materials
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01B-005/28
G01H-013/00
G01N-029/04
출원번호
UP-0818702
(2007-06-15)
등록번호
US-7706985
(2010-05-20)
발명자
/ 주소
Fogarty, Michael D.
Georgeson, Gary E.
출원인 / 주소
The Boeing Company
대리인 / 주소
Toler Law Group
인용정보
피인용 횟수 :
1인용 특허 :
7
초록▼
In a non-limiting, exemplary system for in-situ monitoring of a composite workpiece, at least one ultrasonic testing transducer is mounted to a surface of a composite workpiece and configured to transmit and receive ultrasonic energy to and from the composite workpiece during mechanical loading of t
In a non-limiting, exemplary system for in-situ monitoring of a composite workpiece, at least one ultrasonic testing transducer is mounted to a surface of a composite workpiece and configured to transmit and receive ultrasonic energy to and from the composite workpiece during mechanical loading of the composite workpiece. An ultrasonic pulser/receiver is operatively coupled to the at least one ultrasonic testing transducer. A computing system is operatively coupled to the ultrasonic pulser/receiver. The computing system includes a data acquisition component configured to acquire data from the ultrasonic pulser/receiver and a data analysis component configured to analyze the acquired data. The data analysis component may be further configured to analyze the acquired data for initiation of failure of the composite workpiece and/or growth of failure of the composite workpiece. Further, failure of the composite workpiece may include cracking and/or delaminating and/or disbonding.
대표청구항▼
What is claimed is: 1. A system for in-situ monitoring of a composite workpiece, the system comprising: at least one ultrasonic testing transducer mounted to a surface of a composite workpiece to transmit and receive ultrasonic energy to and from the composite workpiece during mechanical loading of
What is claimed is: 1. A system for in-situ monitoring of a composite workpiece, the system comprising: at least one ultrasonic testing transducer mounted to a surface of a composite workpiece to transmit and receive ultrasonic energy to and from the composite workpiece during mechanical loading of the composite workpiece; an ultrasonic pulser and receiver operatively coupled to the at least one ultrasonic testing transducer; and a computing system operatively coupled to the ultrasonic pulser and receiver, the computing system including: a data acquisition component to acquire data from the ultrasonic pulser and receiver during the mechanical loading; and a data analysis component to analyze the acquired data during the mechanical loading, by identifying a change in an ultrasonic reflection included in the ultrasonic energy received from the composite workpiece during the mechanical loading wherein the change in the ultrasonic reflection indicates initiation of a failure mechanism of the composite workpiece; and upon identifying the change in the ultrasonic reflection, signaling detection of the failure mechanism during the mechanical loading. 2. The system of claim 1, further comprising a multiplexer operatively coupled between the ultrasonic pulser and receiver and the at least one ultrasonic testing transducer. 3. The system of claim 1, further comprising storage media configured to store the acquired data. 4. The system of claim 1, wherein the computing system is operatively coupled to the ultrasonic pulser and receiver via a high-speed data link. 5. The system of claim 4, wherein the high-speed data link includes a network connection. 6. The system of claim 1, wherein the at least one ultrasonic testing transducer includes an ultrasonic testing transducer chosen from a pulse echo ultrasonic testing transducer and a pair of through transmission ultrasonic testing transducers. 7. The system of claim 1, wherein the data analysis component is further configured to analyze the acquired data to monitor the change in the ultrasonic reflection to monitor growth of the failure mechanism of the composite workpiece. 8. The system of claim 7, wherein the data analysis component is further configured to plot the growth of the failure mechanism of the composite workpiece versus a plurality of fatigue cycles during the mechanical loading of the composite workpiece. 9. The system of claim 1, wherein the at least one ultrasonic testing transducer includes a plurality of ultrasonic testing transducers mounted to the surface of a composite workpiece and arranged in an array. 10. The system of claim 1, wherein the data analysis component is further configured to stop the mechanical loading of the composite workpiece after the detection of the failure mechanism. 11. The system of claim 1, wherein the failure mechanism includes cracking of the composite workpiece. 12. The system of claim 1, wherein the failure mechanism includes debonding of the composite workpiece. 13. The system of claim 1, wherein the failure mechanism includes delaminating of the composite workpiece. 14. The system of claim 1, wherein the data analysis component is further configured to identify a lack of an ultrasonic reflection included in the ultrasonic energy received from the composite workpiece during the mechanical loading as indicating no failure mechanism is detected. 15. A system for testing a composite workpiece, the system comprising: a mechanical test system and controller configured to cause a composite workpiece to be placed under mechanical load to cause initiation and growth of a failure mechanism in the composite workpiece; at least one ultrasonic testing transducer mounted to the surface of a composite workpiece and configured to transmit and receive ultrasonic energy to and from the composite workpiece during mechanical loading of the composite workpiece; an ultrasonic pulser and receiver operatively coupled to the at least one ultrasonic testing transducer; and a computing system operatively coupled to the mechanical test system and controller and to the ultrasonic pulser and receiver, the computing system including: a data acquisition component configured to acquire data representing reflections of pulses of ultrasonic energy from the composite workpiece during the mechanical loading; and a data analysis component configured to analyze the acquired data during the mechanical loading, wherein the data analysis component is configured to: identify a change in the reflections of the pulses of ultrasonic energy received from the composite workpiece during the mechanical loading, wherein the change in the reflections of the pulses of ultrasonic energy indicates a change in size of the failure mechanism; and track the change in size of the failure mechanism. 16. The system of claim 15, further comprising storage media configured to store the acquired data. 17. The system of claim 15, wherein the computing system is operatively coupled to the ultrasonic pulser and receiver via a high-speed data link. 18. The system of claim 17, wherein the high-speed data link includes a network connection. 19. The system of claim 15, wherein the at least one ultrasonic testing transducer includes an ultrasonic testing transducer chosen from a pulse echo ultrasonic testing transducer and a pair of through transmission ultrasonic testing transducers. 20. The system of claim 15, wherein the computing system further includes a control component configured to automatically cause the mechanical test system and controller to stop causing the composite workpiece to be placed under mechanical load responsive to detection by the data analysis component of initiation of the failure mechanism in the composite workpiece. 21. The system of claim 15, wherein the at least one ultrasonic testing transducer includes a plurality of ultrasonic testing transducers mounted to the surface of a composite workpiece and arranged in an array. 22. A method for monitoring a composite workpiece, the method comprising: mechanically loading a composite workpiece by inducing a plurality of fatigue cycles in the composite workpiece; and during mechanical loading of the composite workpiece: ultrasonically testing the composite workpiece with at least one ultrasonic testing transducer mounted to a surface of the composite workpiece; wherein the at least one ultrasonic testing transducer generates pulses of ultrasonic energy through a cross section of the composite workpiece; acquiring data representing reflections of the pulses of ultrasonic energy from the cross section of the workpiece, wherein changes in the reflections of the pulses of ultrasonic energy are indicative of changes in the cross section of the workpiece representing one of initiation of a failure mechanism and a growth of the failure mechanism in the composite workpiece; and analyzing the acquired data to: identify the changes in the reflections of the pulses of ultrasonic energy received from the composite workpiece; and track the changes in the reflections of the pulses of ultrasonic energy to track at least one of the initiation of the failure mechanism and the growth of the failure mechanism with increasing fatigue cycles. 23. The method of claim 22, further comprising mounting the at least one ultrasonic testing transducer to the surface of the composite workpiece. 24. The method of claim 23, wherein mounting the at least one ultrasonic testing transducer to the surface of the composite workpiece includes arranging a plurality of ultrasonic testing transducers on the surface of the composite workpiece in an array. 25. The method of claim 22, wherein ultrasonically testing includes: transmitting a transmit electrical signal to the at least one ultrasonic testing transducer; sending at least one stress wave into the composite workpiece from the at least one ultrasonic testing transducer; receiving at least one reflected stress wave at the at least one ultrasonic testing transducer; and converting the at least one reflected stress wave to at least one receive electrical signal. 26. The method of claim 25, further comprising multiplexing the at least one transmit electrical signal and multiplexing the at least one receive electrical signal. 27. The method of claim 22, further comprising storing the acquired data. 28. The method of claim 27, further comprising: retrieving the stored data; and analyzing the retrieved data. 29. The method of claim 22, further comprising automatically stopping mechanical loading of the composite workpiece responsive to detection of the failure mechanism of the composite workpiece.
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이 특허에 인용된 특허 (7)
Hartog, Jan J.; Bellin, Jack L.; Knollman, Gilbert C.; Jonath, Arthur D., Adhesive bond integrity evaluation method.
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