Measuring and testing – Vibration – By mechanical waves
Patent
1982-10-18
1984-11-13
Birmiel, Howard A.
Measuring and testing
Vibration
By mechanical waves
73626, 73642, 73628, G01N 2900
Patent
active
044818220
ABSTRACT:
An ultrasonic synthetic aperture testing apparatus comprises transmitting/receiving sections having an ultrasonic wave probe for transmitting and receiving ultrasonic waves at multiple points on the surface of a steel material, an operation section for accumulating the received signals corresponding to the distance between the multiple points and a reproduction point in a desired region of the material under testing, and a display section for displaying an image formed as a result of this accumulation operation. The ultrasonic wave probe is provided with vibrators corresponding to the respective vibration modes so that two kinds of ultrasonic waves in different vibration modes may be transmitted and received. The accumulation section is provided with a mechanism which performs accumulation and arithmetic operation for the two kinds of waves in different modes.
REFERENCES:
patent: 2912854 (1959-11-01), Schubring
patent: 3548642 (1970-12-01), Flaherty et al.
patent: 3712119 (1973-01-01), Cross
patent: 3868847 (1975-03-01), Gunkel
patent: 3938372 (1976-02-01), Sproule
patent: 4005258 (1977-01-01), Dory
patent: 4038865 (1977-08-01), Flambard et al.
patent: 4317369 (1982-03-01), Johnson
patent: 4328567 (1982-05-01), Dodge
Ishii Junichi
Kubota Jun
Sasaki Soji
Birmiel Howard A.
Hitachi , Ltd.
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