Measuring and testing – Vibration – By mechanical waves
Patent
1981-05-18
1983-12-27
Ruehl, Charles A.
Measuring and testing
Vibration
By mechanical waves
128660, G01N 2900
Patent
active
044223323
ABSTRACT:
An echography device with dynamic focusing and sectorial scanning, comprising a transmitting portion (16) and a receiving portion (18) constituting piezoelectric transducers (4), juxtaposed in a form of a linear bar (2), each transducer (4) being associated with a delay line (26,32), the delays applied when a wave is being received being determined as a function of a reference dependent on the delays when the wave is being retransmitted and stored in a digital memory (34), the said reference being fed into a frequency adjustable oscillator (42) associated with a servo-device (38, 56, 54) through a computer.
REFERENCES:
patent: 4152678 (1979-05-01), Shott et al.
patent: 4173007 (1979-10-01), McKeighen et al.
patent: 4180792 (1979-12-01), Lederman et al.
patent: 4227417 (1980-10-01), Glenn
patent: 4334432 (1982-06-01), Gill
Bernardi et al.-A Dynamicall Focused Annular Array, 1976 Ultrasonics Symposium Proceedings, pp. 157-159, Sep.-Oct. 1976.
Dubuis Jean-Charles
Martin Michel
Piaget Bernard
Piquard Jean-Francois
Vacher Jacques
Commissariat a l''Energie Atomique
Handal Anthony H.
Ruehl Charles A.
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