CA2157652A1 - Method of Operating an Ultrasonic Piezoelectric Transducer and Circuit Arrangement for Performing the Method - Google Patents

Method of Operating an Ultrasonic Piezoelectric Transducer and Circuit Arrangement for Performing the Method

Info

Publication number
CA2157652A1
CA2157652A1 CA2157652A CA2157652A CA2157652A1 CA 2157652 A1 CA2157652 A1 CA 2157652A1 CA 2157652 A CA2157652 A CA 2157652A CA 2157652 A CA2157652 A CA 2157652A CA 2157652 A1 CA2157652 A1 CA 2157652A1
Authority
CA
Canada
Prior art keywords
electrodes
piezoelectric transducer
receiving mode
reception
mode
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA2157652A
Other languages
French (fr)
Other versions
CA2157652C (en
Inventor
Igor Getman
Sergey Lopatin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Endress and Hauser SE and Co KG
Original Assignee
Endress and Hauser SE and Co KG
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 Endress and Hauser SE and Co KG filed Critical Endress and Hauser SE and Co KG
Publication of CA2157652A1 publication Critical patent/CA2157652A1/en
Application granted granted Critical
Publication of CA2157652C publication Critical patent/CA2157652C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B06GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06BMETHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0644Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element
    • B06B1/0662Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction using a single piezoelectric element with an electrode on the sensitive surface
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B06GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06BMETHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/0207Driving circuits
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B06GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06BMETHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/06Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
    • B06B1/0688Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction with foil-type piezoelectric elements, e.g. PVDF
    • B06B1/0692Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction with foil-type piezoelectric elements, e.g. PVDF with a continuous electrode on one side and a plurality of electrodes on the other side
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/02Details
    • H03H9/125Driving means, e.g. electrodes, coils
    • H03H9/13Driving means, e.g. electrodes, coils for networks consisting of piezoelectric or electrostrictive materials
    • H03H9/132Driving means, e.g. electrodes, coils for networks consisting of piezoelectric or electrostrictive materials characterized by a particular shape
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/46Filters
    • H03H9/54Filters comprising resonators of piezo-electric or electrostrictive material
    • H03H9/545Filters comprising resonators of piezo-electric or electrostrictive material including active elements

Abstract

An ultrasonic piezoelectric transducer is alternatingly operated in a transmitting mode and in a receiving mode. In the transmitting mode an electrical excitation signal is applied between one or more common electrodes and one or more transmission electrodes, and in the receiving mode an electrical reception signal is collected between the one or more common electrodes and one or more reception electrodes.
Moreover, in the receiving mode one or more electrodes which are not used as reception electrodes are connected via a low impedance connection with the one or more common electrodes which has the effect that in the receiving mode the reso-nance frequencies of the piezoelectric transducer are shifted to lower values so that with the same operating frequency the piezolectric transducer is in series resonance in the transmitting mode and in parallel resonance in the receiving mode. In this way, the piezoelectric transducer operates under optimum conditions with perfect frequency matching both for transmission and for reception.
CA002157652A 1994-10-10 1995-09-06 Method of operating an ultrasonic piezoelectric transducer and circuit arrangement for performing the method Expired - Fee Related CA2157652C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP94115958A EP0706835B1 (en) 1994-10-10 1994-10-10 Method of operating an ultrasonic piezoelectric transducer and circuit arrangement for performing the method
EP94115958.4 1994-10-10

Publications (2)

Publication Number Publication Date
CA2157652A1 true CA2157652A1 (en) 1996-04-11
CA2157652C CA2157652C (en) 1999-06-15

Family

ID=8216373

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002157652A Expired - Fee Related CA2157652C (en) 1994-10-10 1995-09-06 Method of operating an ultrasonic piezoelectric transducer and circuit arrangement for performing the method

Country Status (5)

Country Link
US (1) US5757104A (en)
EP (1) EP0706835B1 (en)
JP (1) JP2760963B2 (en)
CA (1) CA2157652C (en)
DE (1) DE69416129T2 (en)

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Also Published As

Publication number Publication date
CA2157652C (en) 1999-06-15
DE69416129D1 (en) 1999-03-04
JPH08275294A (en) 1996-10-18
US5757104A (en) 1998-05-26
DE69416129T2 (en) 1999-07-01
EP0706835A1 (en) 1996-04-17
JP2760963B2 (en) 1998-06-04
EP0706835B1 (en) 1999-01-20

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