Measuring and testing – Vibration – By mechanical waves
Patent
1980-06-30
1982-04-13
Ciarlante, Anthony V.
Measuring and testing
Vibration
By mechanical waves
G01N 2904
Patent
active
043241425
ABSTRACT:
A processing circuit is connected to the output of a mosaic which consists of n first electrodes on a first principal surface of a TGS plate and 2p second electrodes on the second principal surface thereof. The circuit is constructed so that the output connections of the second electrodes are grouped in p resultant groups which are connected, via p paths which each comprise an amplifier and a variable delay line, to the inputs of a first adder. The output of the first adder is connected, via a network of (q-1) delay lines having a fixed delay time, to the inputs of q parallel variable delay lines which are connected in parallel and which are connected to the inputs of a second adder. The delay times thus realized are controlled so that a first ultrasonic lens and a second ultrasonic lens are successively formed.
REFERENCES:
patent: 4112411 (1978-09-01), Alais et al.
patent: 4131023 (1978-12-01), Mezrich et al.
Auphan Michel J.
Baghuis Ludo C. J.
Ciarlante Anthony V.
Haken Jack E.
U.S. Philips Corporation
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