Measuring and testing – Vibration – By mechanical waves
Patent
1998-09-02
2000-01-18
Moller, Richard A.
Measuring and testing
Vibration
By mechanical waves
367135, G01N 2900, H04B 106
Patent
active
060148977
ABSTRACT:
A method and an apparatus for enhancing the side-lobe performance of a sparse ultrasonic transducer array using harmonic imaging to reduce all beam sidelobe (including grating lobe) levels. Harmonic imaging consists of using the active transducer elements to transmit an ultrasound signal (wideband or narrowband) of center frequency f.sub.0 and receive at one or more harmonic frequencies nf.sub.0, where n.gtoreq.2.
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Cabou Christian G.
Flaherty Dennis M.
Moller Richard A.
Price Phyllis Y.
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