Measuring and testing – Vibration – By mechanical waves
Patent
1981-05-21
1984-07-10
Birmiel, Howard A.
Measuring and testing
Vibration
By mechanical waves
73602, 73628, 73641, 73626, 367105, 128660, G01N 2900
Patent
active
044585330
ABSTRACT:
In an exemplary embodiment, a transducer element row W.sub.1 through W.sub.m has a signal delay device for the delay of arriving echo signals in such a manner that phase balance of the individual signals result at the output. It is the objective of the disclosure to construct such an apparatus with which, given a specified number of transducers, the grating lobes in the directional response of the antenna are eliminated, and nevertheless the electronic outlay can be kept within boundaries. This objective is achieved in that the signals are transmitted, in groups, respectively, by the delay device to individual adders whose output signals are linked in a unit for quasi-multiplicative processing. In the case of digital technique, through binary signal processing, a considerable simplification results accompanied by the elimination of the interfering directional response of the resolution capability.
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patent: 4228686 (1980-10-01), Tancrell
patent: 4254662 (1981-03-01), Kuroda et al.
patent: 4259733 (1981-03-01), Taner et al.
patent: 4287580 (1981-09-01), Holzschuch
patent: 4325257 (1982-04-01), Kino et al.
patent: 4330875 (1982-05-01), Tachita et al.
Davies et al., "Low Sidelobe Patterns from Thinned Arrays Using Multiplicative Processing"; IEE Proceedings, vol. 127, Part F, No. 1, Feb. 1980, pp. 9-15.
Ultrasonics Symposium Proceedings, IEEE Cat. 77CH1264-ISU, 1977, pp. 250 through 254, McKeighen et al., "New Techniques for Dynamically Variable Electronic Delays for Real Time Ultrasonic Imaging".
Birmiel Howard A.
Siemens Aktiengesellschaft
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