Measuring and testing – Vibration – By mechanical waves
Patent
1994-02-01
1996-09-17
Williams, Hezron E.
Measuring and testing
Vibration
By mechanical waves
73 2406, 73 5441, 73 6179, 73 6453, G01N 2902, G01N 2918
Patent
active
055570470
ABSTRACT:
A method and apparatus for ultrasonic wave measurement wherein the time interval between like order echoes selected with respect to adjacent transmitted waves is controlled to be equal to an integral multiple of a period (t.sub.3) of a continuous oscillation wave. In addition, the time interval between like order echoes adjacent to each other that are selected with respect to the same transmitted wave is controlled to be equal to the period (t.sub.3) of the continuous oscillation wave. The period (t.sub.3) of the continuous oscillation wave that is obtainable under the above controlled state, is measured, and the result of the measurement is used as ultrasonic wave propagation time for obtaining the absolute sound velocity.
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patent: 3715709 (1973-02-01), Zacharias, Jr. et al.
patent: 4095457 (1978-06-01), Koda et al.
patent: 5125273 (1992-06-01), Negita
patent: 5214955 (1993-06-01), Yost et al.
Finley Rose M.
Fuji Ultrasonic Engineering Co. Ltd.
Williams Hezron E.
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