WO2014173745A3 - Method for controlling an acoustic cell - Google Patents

Method for controlling an acoustic cell Download PDF

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Publication number
WO2014173745A3
WO2014173745A3 PCT/EP2014/057685 EP2014057685W WO2014173745A3 WO 2014173745 A3 WO2014173745 A3 WO 2014173745A3 EP 2014057685 W EP2014057685 W EP 2014057685W WO 2014173745 A3 WO2014173745 A3 WO 2014173745A3
Authority
WO
WIPO (PCT)
Prior art keywords
phi
cos
power
frequency
acoustic cell
Prior art date
Application number
PCT/EP2014/057685
Other languages
French (fr)
Other versions
WO2014173745A2 (en
Inventor
David Sergeant
Jeremie Cubeta
Original Assignee
Ipratech Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ipratech Sa filed Critical Ipratech Sa
Publication of WO2014173745A2 publication Critical patent/WO2014173745A2/en
Publication of WO2014173745A3 publication Critical patent/WO2014173745A3/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/0207—Driving circuits
    • B06B1/0223—Driving circuits for generating signals continuous in time
    • B06B1/0238—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave
    • B06B1/0246—Driving circuits for generating signals continuous in time of a single frequency, e.g. a sine-wave with a feedback signal

Abstract

The present invention is related to an iterative method for controlling an acoustic cell (1) separating dispersed particles in a liquid medium, said acoustic cell (1) comprising two opposed plates (5) delimiting a resonating cavity filled with said liquid medium, at least one of the opposed surfaces (4) comprising a piezoelectric transducer (4) coupled to an electrical power generator for producing ultrasonic waves in said resonating cavity, said method comprising the steps of: a. applying an ultrasonic sound field by applying a periodic electrical potential of initial resonant frequency fi and initial power Pi to said piezoelectric transducer (5); b. measuring the cosine of the resulting phase shift phi (cos(phi)) between the electric current and the electric potential applied to the transducer (5); c. if the cos(phi) is lower than a predetermined threshold, increasing the power Pi, else decreasing the power Pi; d. determining the sign of the gradient of cos(phi) as a function of the frequency; e. varying the frequency in the gradient direction thereby maximising cos(phi); f. getting to step (b).
PCT/EP2014/057685 2013-04-22 2014-04-16 Method for controlling an acoustic cell WO2014173745A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP13164759.6 2013-04-22
EP13164759.6A EP2796208A1 (en) 2013-04-22 2013-04-22 Method for controlling an acoustic cell

Publications (2)

Publication Number Publication Date
WO2014173745A2 WO2014173745A2 (en) 2014-10-30
WO2014173745A3 true WO2014173745A3 (en) 2015-03-26

Family

ID=48366114

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/057685 WO2014173745A2 (en) 2013-04-22 2014-04-16 Method for controlling an acoustic cell

Country Status (2)

Country Link
EP (1) EP2796208A1 (en)
WO (1) WO2014173745A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015003012A2 (en) 2013-07-01 2015-01-08 Olivier Berteau Distributed perfusion bioreactor system for continuous culture of biological cells
CN109154516B (en) * 2016-03-30 2021-04-23 江森自控科技公司 Liquid detection system
RU174330U1 (en) * 2017-04-27 2017-10-11 Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный университет геосистем и технологий" (СГУГиТ) Acoustic trap in a standing wave field based on two oncoming beams

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4689515A (en) * 1985-09-30 1987-08-25 Siemens Aktiengesellschaft Method for operating an ultrasonic frequency generator
US5711888A (en) * 1993-05-11 1998-01-27 Sonosep Biotech, Inc. Multilayered piezoelectric resonator for the separation of suspended particles
US5892315A (en) * 1996-06-26 1999-04-06 Gipson; Lamar Heath Apparatus and method for controlling an ultrasonic transducer
EP1195460A2 (en) * 2000-09-28 2002-04-10 Kao Corporation Ultrasonic cleaning apparatus and ultrasonic cleaning method
US20110254519A1 (en) * 2008-12-02 2011-10-20 Hiroshi Hasegawa Ultrasonic generator and program writing method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT398707B (en) 1993-05-11 1995-01-25 Trampler Felix MULTILAYER PIEZOELECTRIC RESONATOR FOR THE SEPARATION OF SUSPENDED PARTICLES

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4689515A (en) * 1985-09-30 1987-08-25 Siemens Aktiengesellschaft Method for operating an ultrasonic frequency generator
US5711888A (en) * 1993-05-11 1998-01-27 Sonosep Biotech, Inc. Multilayered piezoelectric resonator for the separation of suspended particles
US5892315A (en) * 1996-06-26 1999-04-06 Gipson; Lamar Heath Apparatus and method for controlling an ultrasonic transducer
EP1195460A2 (en) * 2000-09-28 2002-04-10 Kao Corporation Ultrasonic cleaning apparatus and ultrasonic cleaning method
US20110254519A1 (en) * 2008-12-02 2011-10-20 Hiroshi Hasegawa Ultrasonic generator and program writing method

Also Published As

Publication number Publication date
EP2796208A1 (en) 2014-10-29
WO2014173745A2 (en) 2014-10-30

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