Acoustic emission linear pulse holography

Patent · Tue Jan 01 04:00:00 EST 1985

OSTI ID:865528

Collins, H Dale ^[1]; Busse, Lawrence J ^[1]; Lemon, Douglas K ^[2]

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1. Richland, WA
2. West Richland, WA

Defects in a structure are imaged as they propagate, using their emitted acoustic energy as a monitored source. Short bursts of acoustic energy propagate through the structure to a discrete element receiver array. A reference timing transducer located between the array and the inspection zone initiates a series of time-of-flight measurements. A resulting series of time-of-flight measurements are then treated as aperture data and are transferred to a computer for reconstruction of a synthetic linear holographic image. The images can be displayed and stored as a record of defect growth.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA
• DOE Contract Number: AT(45-1)-1830
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4531411
• OSTI ID: 865528
• Country of Publication: United States
• Language: English

Related Subjects

/73/
acoustic
acoustic emission
acoustic energy
aperture
array
bursts
computer
data
defect
defects
discrete
displayed
element
emission
emission line
emitted
energy
growth
holographic
holographic image
holography
image
imaged
images
initiates
inspection
linear
linear pulse
located
measurements
monitored
propagate
pulse
receiver
receiver array
reconstruction
record
reference
resulting
series
source
stored
structure
synthetic
time-of-flight
time-of-flight measurement
time-of-flight measurements
timing
transducer
transferred
treated
zone