Measuring and testing – Vibration – By mechanical waves
Patent
1983-12-27
1986-02-04
Birmiel, Howard A.
Measuring and testing
Vibration
By mechanical waves
73582, 73600, 73611, G01N 2904
Patent
active
045677646
ABSTRACT:
A method and apparatus for detecting disbond in laminar workpieces. Energy is transmitted to a workpiece (8) by repetitive impacts. A transducer (12) converts energy emitted from the workpiece (8) to an electrical signal. The energy emitted in response to each of the repetitive impacts is analyzed. After filtering out the DC component (20) and amplifying the signal (30) the maximum amplitude of the energy from each impact is selected (50) and passed to a sample and hold circuit (60). The piecewise linear output of the sample and hold circuit (60) is passed through a low pass active filter (70) prior to recording on a strip chart recorder. The strip chart record is analyzed to ascertain areas of the workpiece (8) having defective clad bonding (7).
REFERENCES:
patent: 3580056 (1971-05-01), Warner
patent: 4184373 (1980-01-01), Evans et al.
patent: 4202515 (1980-05-01), Meyer
patent: 4475398 (1984-10-01), Tjornehoj et al.
patent: 4479386 (1984-10-01), Beggs et al.
Jamison Thomas D.
Radcliff Frank T.
Birmiel Howard A.
Combustion Engineering Inc.
Smith David L.
LandOfFree
Detection of clad disbond does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Detection of clad disbond, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection of clad disbond will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2334708