The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 2019
Filed:
Mar. 31, 2015
Nederlandse Organisatie Voor Toegepast-natuurwetenschappelijk Onderzoek Tno, s-Gravenhage, NL;
Sonaxis S.a., Besançon, FR;
Arno Willem Frederik Volker, s-Gravenhage, NL;
Paul Louis Maria Joseph Van Neer, s-Gravenhage, NL;
Guillaume Lucien Gérard Pierre, Besançon, FR;
Francois Louis Denis Marie Bouvet, Besançon, FR;
Sophie Crozat, Besançon, FR;
Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO, 's-Gravenhage, NL;
Sonaxis S.A., Besancon, FR;
Abstract
Properties of a medium, such as its particle size distribution, are characterized using a measurement cell containing a medium between walls of the cell, with ultrasound transducers on opposite walls. Ultrasound is transmitted from the ultrasound transducers on both sides and transmission and reflection responses are detected. An ultrasound frequency dependent ratio of a Fourier transform value of a product of signals obtained from transmission responses in opposite directions and a Fourier transform value of a product of signals obtained from reflections at the transducers is computed. Preferably, the first received reflected and transmitted pulses in response to pulse excitation are used to compute the ratio. Ultrasound frequency dependent ultrasound speed and/or attenuation data of ultrasound in the medium are computed as a function of the ultrasound frequency from the ratio. This eliminates the effect of the walls.