Measuring and testing – Vibration – By mechanical waves
Patent
1977-07-15
1979-10-09
Gill, James J.
Measuring and testing
Vibration
By mechanical waves
73617, 73626, 73641, G01N 2904
Patent
active
041701429
ABSTRACT:
A linear transducer array for transmitting and receiving acoustic waves in both pulse-echo and holographic modes of operation. For pulse-echo acoustic imaging the array includes a linear subarray of transmitting transducer elements disposed in a plane along a longitudinal axis. Each transmitting element has an elongate shape and a principal axis that is perpendicular to the longitudinal axis of the array. For holographic imaging the apparatus further includes a removable mechanical shutter for blocking a predetermined portion of the principal axis of each of the transmitting elements so that a dispersive acoustic beam can be generated. The array also includes a linear subarray of receiving transducer elements coplanar with the transmitting subarray and disposed parallel to the longitudinal axis. The subarray of receiving elements is used to detect the reflected acoustic waves for both holographic and pulse-echo imaging.
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Davis Thomas J.
Hildebrand B. Percy
Posakony Gerald J.
Electric Power Research Institute Inc.
Gill James J.
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