UT method of identifying a stuck joint
First Claim
1. A UT method of identifying a stuck portion of a joint between a first workpiece and a second workpiece, comprising:
- transmitting a primary US beam and a secondary US beam from an ultrasonic testing probe into an assembly including the first workpiece and the second workpiece wherein the primary US beam is high gain and wherein the secondary US beam is low gain; and
wherein the primary and secondary US beams are fired in within milliseconds of one another;
capturing a plurality of US reflections of the primary US beam and the secondary US beam;
creating a high gain A-scan presentation associated with the primary US beam and creating a low gain A-scan presentation associated with the secondary US beam;
identifying a low gain initial pulse representation on the low gain A-scan presentation and identifying a low gain initial pulse representation peak;
allocating an interface detection gate on the high gain A-scan presentation located a gate offset distance from the low gain initial pulse representation peak to a gate opening point, wherein the interface detection gate has a gate period defined by the gate opening point and a gate closing point, and wherein the interface detection gate has a gate amplitude; and
analyzing the high gain A-scan presentation within the interface detection gate and creating a stuck joint portion alert if a portion of the high gain A-scan presentation exceeds the gate amplitude within the interface detection gate.
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Accused Products
Abstract
An ultrasonic testing method to identify a stuck joint between two workpieces utilizing an ultrasonic probe to transmit ultrasonic (US) beams into the joint area and capture the associated US reflections. The method transmits two separate US beams fired in very close proximity to one another. The probe then captures a plurality of US reflections. The method looks for subtle variations in a high gain A-scan presentation of a high gain reflected beam, while using a low gain US beam to identify the particular region on the high gain A-scan presentation in which to look for signs of a stuck joint. Subtle variations within a particular region of the high gain A-scan presentation identify stuck joints. The method is applicable to metals and nonmetals and is not limited to fusion welding, but may also be used with solid state welds, brazed and soldered joints, and adhesively joined workpieces.
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Citations
20 Claims
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1. A UT method of identifying a stuck portion of a joint between a first workpiece and a second workpiece, comprising:
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transmitting a primary US beam and a secondary US beam from an ultrasonic testing probe into an assembly including the first workpiece and the second workpiece wherein the primary US beam is high gain and wherein the secondary US beam is low gain; and
wherein the primary and secondary US beams are fired in within milliseconds of one another;capturing a plurality of US reflections of the primary US beam and the secondary US beam; creating a high gain A-scan presentation associated with the primary US beam and creating a low gain A-scan presentation associated with the secondary US beam; identifying a low gain initial pulse representation on the low gain A-scan presentation and identifying a low gain initial pulse representation peak; allocating an interface detection gate on the high gain A-scan presentation located a gate offset distance from the low gain initial pulse representation peak to a gate opening point, wherein the interface detection gate has a gate period defined by the gate opening point and a gate closing point, and wherein the interface detection gate has a gate amplitude; and analyzing the high gain A-scan presentation within the interface detection gate and creating a stuck joint portion alert if a portion of the high gain A-scan presentation exceeds the gate amplitude within the interface detection gate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A UT method of identifying a stuck portion of a joint between a first workpiece and a second workpiece, comprising:
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transmitting a primary US beam and a secondary US beam from an ultrasonic testing probe into an assembly including the first workpiece and the second workpiece, wherein the ultrasonic testing probe is a high-frequency two-dimensional matrix phased-array probe;
wherein the primary US beam is high gain and wherein the secondary US beam is low gain; and
wherein the primary and secondary US beams are fired in within milliseconds of one another;capturing a plurality of US reflections of the primary US beam and the secondary US beam; creating a high gain A-scan presentation associated with the primary US beam and creating a low gain A-scan presentation associated with the secondary US beam, wherein the high gain A-scan presentation includes a high gain initial pulse representation that has a high gain initial pulse representation peak and a high gain initial pulse representation amplitude; identifying a low gain initial pulse representation on the low gain A-scan presentation and identifying a low gain initial pulse representation peak; allocating an interface detection gate on the high gain A-scan presentation located a gate offset distance from the low gain initial pulse representation peak to a gate opening point, wherein the interface detection gate has a gate period defined by the gate opening point and a gate closing point, and wherein the interface detection gate has a gate amplitude that is greater than 15 percent of the high gain initial pulse representation amplitude and less than 40 percent of the high gain initial pulse representation amplitude, and wherein the gate offset distance positions the interface detection gate in the proximity of at least one high gain interface reflection representation, and wherein the gate period is less than fifty percent of the gate offset distance; and analyzing the high gain A-scan presentation within the interface detection gate and creating a stuck joint portion alert if a portion of the high gain A-scan presentation exceeds the gate amplitude within the interface detection gate. - View Dependent Claims (17, 18, 19)
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20. A UT method of identifying a stuck portion of a joint between a first workpiece and a second workpiece, comprising:
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transmitting a primary US beam and a secondary US beam from an ultrasonic testing probe into an assembly including the first workpiece and the second workpiece, wherein the ultrasonic testing probe is a high-frequency two-dimensional matrix phased-array probe including at least 100 piezocomposite elements and at least 9 piezocomposite elements of the at least 100 piezocomposite elements are electronically grouped together to create an aperture to electronically focus and steer the primary US beam and the secondary US beam, and wherein the joint between the first workpiece and the second workpiece is divided into at least 81 joint portions;
wherein the primary US beam is high gain and wherein the secondary US beam is low gain; and
wherein the primary and secondary US beams are fired in within milliseconds of one another;capturing a plurality of US reflections of the primary US beam and the secondary US beam for each joint portion; creating a high gain A-scan presentation associated with the primary US beam and creating a low gain A-scan presentation associated with the secondary US beam for each joint portion, wherein the high gain A-scan presentation includes a high gain initial pulse representation that has a high gain initial pulse representation peak and a high gain initial pulse representation amplitude; identifying a low gain initial pulse representation on the low gain A-scan presentation and identifying a low gain initial pulse representation peak for each joint portion; allocating an interface detection gate on the high gain A-scan presentation of each joint portion located a gate offset distance from the low gain initial pulse representation peak to a gate opening point, wherein each interface detection gate has a gate period defined by the gate opening point and a gate closing point, and wherein each interface detection gate has a gate amplitude that is greater than 15 percent of the high gain initial pulse representation amplitude and less than 40 percent of the high gain initial pulse representation amplitude, and wherein each gate offset distance positions each interface detection gate in the proximity of at least one high gain interface reflection representation, and wherein each gate period is less than fifty percent of each gate offset distance; and analyzing each high gain A-scan presentation within the associated interface detection gate and creating a stuck joint portion alert if a portion of the high gain A-scan presentation exceeds the gate amplitude within the interface detection gate, and creating a stuck joint alert if the number of distinct stuck joint portion alerts exceeds 10 percent of the number of joint portions.
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Specification