Measuring and testing – Vibration – Resonance – frequency – or amplitude study
Patent
1995-12-20
1997-11-25
Williams, Hezron E.
Measuring and testing
Vibration
Resonance, frequency, or amplitude study
73159, 73627, 73597, G01N 2900
Patent
active
056914741
ABSTRACT:
The invention relates to a method and apparatus for dynamic determination of the thickness and/or basis weight of moving material under test. The material under test is exposed to a focused ultrasound filed with high sound intensity, whereby the sound fraction coming from the material under test is detected directly in the near filed, i.e. at a distance smaller than or equal to the acoustic wavelength used, and evaluated for determining the thickness and/or basis weight. The near-field measurement preferably takes place with continuous sound and in transmission.
REFERENCES:
patent: 3470734 (1969-10-01), Agdur et al.
patent: 3562500 (1971-02-01), Grant
patent: 3757122 (1973-09-01), Bossen
patent: 4446735 (1984-05-01), Weilacher
patent: 4519249 (1985-05-01), Hunt
patent: 4612807 (1986-09-01), Wunderer
patent: 4991432 (1991-02-01), Houghton et al.
W. Manthey und N. Kroemer, Technisches Messen tm 56 (1989) 10, "Ultraschallsensoren auf der Basis piezoelektrischer Polymere", pp. 377-384.
Wolfgang Manthey und Valentin Magori, Sensor 1993, Kongressand II, "Ultraschallwandler-Arrays fur Anwendungen in Luft", pp. 81-88.
Giesecke & Devrient GmbH
Kwok Helen C.
Williams Hezron E.
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