EP0927987A3 - Sound transducer system - Google Patents

Sound transducer system Download PDF

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Publication number
EP0927987A3
EP0927987A3 EP98124257A EP98124257A EP0927987A3 EP 0927987 A3 EP0927987 A3 EP 0927987A3 EP 98124257 A EP98124257 A EP 98124257A EP 98124257 A EP98124257 A EP 98124257A EP 0927987 A3 EP0927987 A3 EP 0927987A3
Authority
EP
European Patent Office
Prior art keywords
vibrating plate
flexural
antinode zones
sound
antinode
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
EP98124257A
Other languages
German (de)
French (fr)
Other versions
EP0927987A2 (en
EP0927987B1 (en
Inventor
Helmut Pfeiffer
Karl Flögel
Gerold Dr. Klotz-Engmann
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 EP0927987A2 publication Critical patent/EP0927987A2/en
Publication of EP0927987A3 publication Critical patent/EP0927987A3/en
Application granted granted Critical
Publication of EP0927987B1 publication Critical patent/EP0927987B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/35—Sound-focusing or directing, e.g. scanning using mechanical steering of transducers or their beams
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means

Abstract

Das Schallwandlersystem (10) enthält eine Biegeschwingerplatte (30), die mit einem elektromechanischen Wandler (20) gekoppelt und so ausgebildet ist, daß sie bei der Systembetriebsfrequenz zu Biegeschwingungen höherer Ordnung angeregt wird, bei denen sich auf der Biegeschwingerplatte (30) Knotenlinien ausbilden, zwischen denen abwechselnd gegenphasig schwingende erste und zweite Schwingungsbauchzonen liegen. Zur Beeinflussung der Schallabstrahlung ist in den zueinander gleichphasig und zu den ersten Schwingungsbauchzonen gegenphasig schwingenden zweiten Schwingungsbauchzonen auf der dem Übertragungsmedium abgewandten Rückseite der Biegeschwingerplatte jeweils ein Massering (40) konzentrisch zum Mittelpunkt (A) der Biegeschwingerplatte (30) angebracht. Infolge der vergrößerten Masse schwingen die zweiten Schwingungsbauchzonen mit wesentlich kleinerer Amplitude als die ersten Schwingungsbauchzonen, so daß sich die von den ersten und zweiten Schwingungsbauchzonen erzeugten gegenphasigen Schallwellen nicht vollständig gegenseitig kompensieren können. Dadurch entsteht ein Strahlungsdiagramm mit ausgeprägter Richtwirkung in der Richtung senkrecht zur Biegeschwingerplatte.

Figure 00000001
The sound transducer system (10) contains a flexural vibrating plate (30) which is coupled to an electromechanical transducer (20) and is designed such that it is excited at the system operating frequency to produce higher-order flexural vibrations in which node lines form on the flexural vibrating plate (30), between which there are alternating first and second antinode zones oscillating in opposite phases. In order to influence the sound radiation, a mass ring (40) is attached concentrically to the center (A) of the flexural vibrating plate (30) in the second oscillating antinodes which oscillate in phase with one another and in antiphase with the first oscillation antinodes. As a result of the increased mass, the second antinode zones vibrate with a substantially smaller amplitude than the first antinode zones, so that the antiphase sound waves generated by the first and second antinode zones cannot fully compensate one another. This creates a radiation diagram with a pronounced directional effect in the direction perpendicular to the bending transducer plate.
Figure 00000001
EP98124257A 1997-12-30 1998-12-18 Sound transducer system Expired - Lifetime EP0927987B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19758243A DE19758243A1 (en) 1997-12-30 1997-12-30 Sound converter system
DE19758243 1997-12-30

Publications (3)

Publication Number Publication Date
EP0927987A2 EP0927987A2 (en) 1999-07-07
EP0927987A3 true EP0927987A3 (en) 2001-10-04
EP0927987B1 EP0927987B1 (en) 2004-02-04

Family

ID=7853589

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98124257A Expired - Lifetime EP0927987B1 (en) 1997-12-30 1998-12-18 Sound transducer system

Country Status (5)

Country Link
US (1) US6081064A (en)
EP (1) EP0927987B1 (en)
JP (1) JP3062170B2 (en)
CA (1) CA2257584C (en)
DE (2) DE19758243A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6682214B1 (en) * 1999-09-21 2004-01-27 University Of Hawaii Acoustic wave micromixer using fresnel annular sector actuators
ES2187382B1 (en) * 2001-11-23 2004-08-16 Consejo Sup. Investigaciones Cientificas MACROSONIC ISSUER OF VIBRATING PLATE, WITH REFLECTORS AND SEPARATORS OF INTERNAL AREAS TO OBTAIN DIRECT RADIATION IN FLUIDS.
US6984923B1 (en) * 2003-12-24 2006-01-10 The United States Of America As Represented By The Secretary Of The Navy Broadband and wide field of view composite transducer array
JP2009502466A (en) * 2005-07-27 2009-01-29 コンセホ・スペリオール・デ・インベスティガシオネス・シエンティフィカス Macro-sonic generator for industrial defoaming of air-based liquids
DE102006058926B4 (en) * 2006-12-12 2020-09-24 Endress+Hauser SE+Co. KG Device for determining and / or monitoring a process variable
GB2492508B (en) * 2010-03-23 2014-06-04 Baker Hughes Inc Apparatus and method for generating broad bandwidth acoustic energy
DE102012200757B4 (en) * 2012-01-05 2022-01-05 Vitesco Technologies GmbH Level sensor
DE102013211606A1 (en) * 2013-06-20 2014-12-24 Robert Bosch Gmbh Environment sensing device with ultrasonic transducer, and motor vehicle with such environment sensing device
DE102013211619A1 (en) * 2013-06-20 2014-12-24 Robert Bosch Gmbh Environment sensing device with ultrasonic transducer, and motor vehicle with such environment sensing device
DE102017209823A1 (en) * 2017-06-09 2018-12-13 Robert Bosch Gmbh ultrasonic sensor
DE102020100162B4 (en) * 2020-01-07 2023-01-12 Umfotec Gmbh Device for reducing airborne and structure-borne noise

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4333028A (en) * 1980-04-21 1982-06-01 Milltronics Ltd. Damped acoustic transducers with piezoelectric drivers
US4768615A (en) * 1986-01-27 1988-09-06 Endress U. Hauser Gmbh U. Co. Acoustic transducer system
US5299175A (en) * 1989-10-06 1994-03-29 Consejo Superior De Investigaciones Cientificas Electroacoustic unit for generating high sonic and ultra-sonic intensities in gases and interphases
US5452267A (en) * 1994-01-27 1995-09-19 Magnetrol International, Inc. Midrange ultrasonic transducer

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3525071A (en) * 1968-04-10 1970-08-18 Dynamics Corp America Electroacoustic transducer
CA1136257A (en) * 1980-04-21 1982-11-23 Stanley Panton Broadly tuned directional transducer
JPS5778299A (en) * 1980-10-31 1982-05-15 Houyuu Gomme Kk Diaphragm for speaker
CA2048866A1 (en) * 1990-08-10 1992-02-11 Teruo Kishi Acoustic-emission sensor
US5218575A (en) * 1992-09-04 1993-06-08 Milltronics Ltd. Acoustic transducer
DE4230773C2 (en) * 1992-09-15 2000-05-04 Endress Hauser Gmbh Co Ultrasonic transducer
US5309411A (en) * 1992-12-08 1994-05-03 Dehua Huang Transducer
JPH06219900A (en) * 1993-01-28 1994-08-09 Dowa Mining Co Ltd Production of si-doped n-type gallium arsenide single crystal
JPH08289397A (en) * 1995-04-14 1996-11-01 Olympus Optical Co Ltd Piezoelectric element for ultrasonic probe
DE19620133C2 (en) * 1996-05-18 2001-09-13 Endress Hauser Gmbh Co Sound or ultrasonic sensor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4333028A (en) * 1980-04-21 1982-06-01 Milltronics Ltd. Damped acoustic transducers with piezoelectric drivers
US4768615A (en) * 1986-01-27 1988-09-06 Endress U. Hauser Gmbh U. Co. Acoustic transducer system
US5299175A (en) * 1989-10-06 1994-03-29 Consejo Superior De Investigaciones Cientificas Electroacoustic unit for generating high sonic and ultra-sonic intensities in gases and interphases
US5452267A (en) * 1994-01-27 1995-09-19 Magnetrol International, Inc. Midrange ultrasonic transducer

Also Published As

Publication number Publication date
JP3062170B2 (en) 2000-07-10
EP0927987A2 (en) 1999-07-07
US6081064A (en) 2000-06-27
DE59810709D1 (en) 2004-03-11
CA2257584A1 (en) 1999-06-30
EP0927987B1 (en) 2004-02-04
JPH11262087A (en) 1999-09-24
CA2257584C (en) 2001-07-24
DE19758243A1 (en) 1999-07-15

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