Boots – shoes – and leggings
Patent
1985-12-31
1988-08-23
Lall, Parshotam S.
Boots, shoes, and leggings
364571, 73625, 73628, 73611, G01N 2904
Patent
active
047665548
ABSTRACT:
Ultrasonic inspection apparatus includes a linear array of transmitting transducers and a linear array of receiving transducers providing TTU mode ultrasonic inspection. One to four transmitting transducers may be simultaneously pulsed as a group, and one to four receiving transducers may be simultaneously connected in common in a group by operation of a connection circuit. The connection circuit includes a plurality of multiplexor circuits having their signal inputs connected in common to respective receiving transducers and their address terminals connected to the data output terminals of programmable read only memory devices. Calibration means are provided for correcting the output signals produced by the receiving transducers to compensate for variations in the response of individual transducers.
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Sarr Dennis P.
Young Fred D.
Lall Parshotam S.
The Boeing Company
Trans V. N.
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