EP1515303A1 - Ensemble composé d'un transducteur ultrasonique et d'un anneau massif pour atténuer des résonances parasites - Google Patents

Ensemble composé d'un transducteur ultrasonique et d'un anneau massif pour atténuer des résonances parasites Download PDF

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Publication number
EP1515303A1
EP1515303A1 EP04017189A EP04017189A EP1515303A1 EP 1515303 A1 EP1515303 A1 EP 1515303A1 EP 04017189 A EP04017189 A EP 04017189A EP 04017189 A EP04017189 A EP 04017189A EP 1515303 A1 EP1515303 A1 EP 1515303A1
Authority
EP
European Patent Office
Prior art keywords
housing
membrane
mass ring
ring
ultrasonic transducer
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
EP04017189A
Other languages
German (de)
English (en)
Other versions
EP1515303B1 (fr
Inventor
Michael Kochan
Gerry Schröter
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.)
Sick Engineering GmbH
Original Assignee
Sick Engineering GmbH
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 Sick Engineering GmbH filed Critical Sick Engineering GmbH
Priority to PL04017189T priority Critical patent/PL1515303T3/pl
Publication of EP1515303A1 publication Critical patent/EP1515303A1/fr
Application granted granted Critical
Publication of EP1515303B1 publication Critical patent/EP1515303B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G10K11/002—Devices for damping, suppressing, obstructing or conducting sound in acoustic devices
    • 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
    • G10K9/122—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using piezoelectric driving means

Definitions

  • the invention relates to an ultrasonic transducer according to the preamble of Claim 1.
  • ultrasonic transducer From DE 100 40 344 A1, such an ultrasonic transducer is known, the Generation and detection of ultrasonic signals is used and the one mutual conversion of electrical vibrations into acoustic Vibrations allowed.
  • These ultrasonic transducers are used for example in Gas flow meters used.
  • Each arranged in pairs Ultrasonic transducers define a measurement path that is non-perpendicular Angle to the longitudinal axis is.
  • the measuring principle consists in a determination of a Transit time difference of two ultrasonic signals, which is once a component in Flow direction and once a component against the flow direction exhibit. From the measured transit time difference can be under consideration calculate the flow velocity of the geometry.
  • the adapter flanges are either welded or integral of the meter body, if this is manufactured in casting technology. Because the ultrasonic transducers 16 and 18 installed at a certain angle (usually 45 °) Be always creates a cavity 28, which represents a flow disturbance. This disorder exists regardless of how deep the ultrasound transducer, in the middle, withdrawn or immersed, is inserted. The disorders are among others the larger the larger the sensor diameter and the associated Size of the sensor pocket is in relation to the diameter of the measuring cell. Which forming vortices are not fully calculated analytically and are of upstream of the flowmeter possibly existing Vorinen the flow and the flow rate (Reynolds number) dependent. The result resulting errors are determined in practice by calibration and in shape stored a mostly non-linear correction function. Because in the calibration always only a certain Reynolds number range and a concrete installation situation can be covered, a residual error arises in the event of variation of these conditions, which always occur in practice.
  • the ultrasonic transducers are used in multipath arrangements, to detect asymmetries in the flow.
  • the achievable number of paths is determined by the available mounting space, limited by the transducer size, certainly.
  • the resulting cavity is a danger of accumulation of deposits given, which can affect the measurement accuracy, the Deposits are larger the larger the cavity is.
  • the previously realized transducer dimensions thus limit the achievable Accuracy due to excessive flow or leave no multi-path arrangement from sensors because of the limited mounting space too.
  • the size of the Sensors also not insignificantly requires the overall design for a complete Counter and brings additional problems for example in the pressure resistance, the cost of materials, the weight and affects the whole Production costs. Handling during production, transport, installation, maintenance, Repair is difficult.
  • an ultrasonic transducer which is a piezoelectric Element having, via a spring to an ultrasonic radiating Membrane is pressed.
  • the membrane On the edge, the membrane has one with the membrane integrally formed, reinforced, i. a higher mass edge on, which is thus ring-shaped and serves, due to its mass to dampen interfering frequencies.
  • the edge is in its longitudinal extension kept as short as possible and is at the height of the piezoelectric element arranged.
  • the ultrasonic transducer according to the invention has a housing in a known manner, at least one piezoelectric element and one emitting the ultrasound or receiving membrane on the edge of a mass ring is angeordent. According to the invention, it is further provided that the ultrasonic transducer after the Longitudinal oscillator type is formed, that the mass ring separately from the membrane is and is connected on the inside edge with this and with the housing and that the housing has on the inside a damping element which is annular is formed and arranged adjacent to the ground ring.
  • the mass ring is screwed to the membrane, so that the mass ring and the membrane in a defined position to each other and firmly connected to each other. The same applies to the connection of the mass ring with the housing.
  • the ultrasonic transducers in flow meters for aggressive and hazardous and high pressure and temperature media used, so that advantageously the membrane and the housing at the level of Masseringes are welded together. This is an absolute tightness of the Given converter.
  • the Damping element made of an elastic material, preferably one rubbery material.
  • the separate mass ring may also be formed integrally with the housing.
  • the term "separate" should merely indicate that the mass ring is separate from the membrane, because that is an essential feature of the invention that the advantageous Damping causes significant.
  • a measuring arrangement 10 is shown, the measuring principle, for example an ultrasonic gas flow meter illustrates.
  • a pipe 12 flows a gas in the flow direction 14.
  • Ultrasonic transducers 16 and 18 are arranged, which define a measuring path 20.
  • the Ultrasonic transducers 16, 18 are suitable electrical signals in ultrasound to convert and vice versa, to send and receive ultrasound.
  • Of the Measuring path 20 is at an angle not equal to 90 ° to a longitudinal axis 22 of the Pipeline 12 is arranged so that the in the opposite direction along the Measuring path 20 sent ultrasonic signals due to the gas flow 14 a Have runtime difference. From the maturity difference and the corresponding Geometry allows the flow velocity and thus the Determine the volume flow of the gas.
  • the ultrasonic transducer 16 (FIG. 1) has an ultrasound generating element 30 on, which can consist of two piezoceramics 32, 34, which with an electric Line 36 are connected.
  • the electrical line 36 is electrically insulating guided.
  • the piezoelectric element 30 is between two cylindrical Clamping sections 40 and 42 clamped.
  • the two clamping sections 40 and 42 are connected to each other via a clamping member 44, so that the piezoelectric Element 30 is held clamped between the clamping sections.
  • the free Front side 46 of the clamping section 42 serves as a transmitting and / or receiving surface, over which the ultrasonic signals are emitted or received.
  • the end face 46 is designed as a bending plate 48 and is referred to below as a membrane 48.
  • Ultrasound signals oscillate the diaphragm 48 according to the of the generated piezoelectric element 30 and the rigid clamping section 42nd transmitted ultrasonic vibrations and thus emits the ultrasonic signals.
  • the signal sequence is reversed and the Membrane 48 absorbs the ultrasonic vibrations that occur over the tensioning section 42 are passed to the piezoelectric element 30, the vibrations in converts electrical signals.
  • the membrane 48 has an angled edge 50, to which a housing 52, which is the aforementioned signal-conducting and signal-processing components surrounds.
  • the housing 52 is formed substantially cylindrical.
  • the edge 50 of the membrane 48 On its inside is the edge 50 of the membrane 48 with a ground ring 54 connected, preferably screwed.
  • the Massering is only marginally with the Connected membrane 48, so only in the region of the edge 50, so that the membrane 48th has the largest possible area for swinging.
  • the inside is arranged mass ring 54 spaced from the membrane 48 via a gap L.
  • the mass ring 54 screwed into the edge 50 protrudes beyond the edge 50, such that the mass ring 54 can also be connected to the housing 52, in particular is screwed. Since the housing in a suitable and not shown Way, e.g. via an end 58 remote from the diaphragm 48 arranged flange, in which flow meter can be fixed, are above the Massering 54 also the signal-conducting and signal-processing components held.
  • the housing 52 with the edge 50 welded.
  • the housing 52 on the inside a damping element 64 which consists of an elastic material, For example, rubber, may exist.
  • the damping element is annular formed so that it come to rest on the inside of the housing 52 can and is advantageously arranged adjacent to the mass ring 54.
  • the mass ring 54 can also be integrally formed with the housing 52.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Measuring Volume Flow (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
EP04017189A 2003-09-09 2004-07-21 Ensemble composé d'un transducteur ultrasonique et d'un anneau massif pour atténuer des résonances parasites Expired - Lifetime EP1515303B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL04017189T PL1515303T3 (pl) 2003-09-09 2004-07-21 Układ przetwornika ultradźwiękowego z pierścieniem masowym do tłumienia rezonansów zakłóceniowych

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10341422 2003-09-09
DE10341422A DE10341422A1 (de) 2003-09-09 2003-09-09 Ultraschallwandleranordnung

Publications (2)

Publication Number Publication Date
EP1515303A1 true EP1515303A1 (fr) 2005-03-16
EP1515303B1 EP1515303B1 (fr) 2006-09-20

Family

ID=34129700

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04017189A Expired - Lifetime EP1515303B1 (fr) 2003-09-09 2004-07-21 Ensemble composé d'un transducteur ultrasonique et d'un anneau massif pour atténuer des résonances parasites

Country Status (6)

Country Link
US (1) US20050054932A1 (fr)
EP (1) EP1515303B1 (fr)
AT (1) ATE340398T1 (fr)
DE (2) DE10341422A1 (fr)
ES (1) ES2271748T3 (fr)
PL (1) PL1515303T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008147325A1 (fr) * 2007-06-01 2008-12-04 Axsensor Ab Dispositif transducteur piézoélectrique
DE102012209238A1 (de) * 2012-05-31 2013-12-05 Robert Bosch Gmbh Ultraschallsensor sowie Vorrichtung und Verfahren zur Messung eines Abstands zwischen einem Fahrzeug und einem Hindernis

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008027970B4 (de) * 2008-06-12 2013-04-04 Hella Kgaa Hueck & Co. Ultraschallsensor
DE102010064117A1 (de) 2010-12-23 2012-06-28 Endress + Hauser Flowtec Ag Ultraschallwandler
DE102014104134A1 (de) * 2014-03-25 2015-10-01 Hydrovision Gmbh Vorrichtung zur akustischen Durchflussmessung und Verfahren für eine derartige Vorrichtung
DE102015110939B4 (de) 2015-07-07 2019-02-14 Valeo Schalter Und Sensoren Gmbh Ultraschallsensor für ein Kraftfahrzeug, Kraftfahrzeug sowie Verfahren zum Herstellen eines Ultraschallsensors
DE102015113561A1 (de) 2015-08-17 2017-02-23 Endress + Hauser Flowtec Ag Ultraschallwandler zum Einsatz in Ultraschall- Durchflussmessgeräten zur Messung der Durchflussgeschwindigkeit oder dem Volumendurchfluss von Medien in einer Rohrleitung sowie ein Verfahren zur Herstellung eines solchen Ultraschallwandlers
US10585178B2 (en) * 2015-10-21 2020-03-10 Semiconductor Componenents Industries, Llc Piezo transducer controller and method having adaptively-tuned linear damping

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1086640A (en) * 1963-12-16 1967-10-11 Nat Res Dev Damping backing for piezo-electric crystal or transducer
US4162111A (en) * 1977-08-25 1979-07-24 E. I. Du Pont De Nemours And Company Piezoelectric ultrasonic transducer with damped housing
JPS6194496A (ja) * 1984-10-16 1986-05-13 Nissan Motor Co Ltd 超音波マイクロフオン
EP0897101A1 (fr) * 1997-08-14 1999-02-17 Electrowatt Technology Innovation AG Débitmètre à ultrason
DE10040344A1 (de) * 2000-08-17 2002-02-28 Sick Ag Ultraschallwandler

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2803129A (en) * 1951-05-28 1957-08-20 Council Scient Ind Res Apparatus for testing of elastic materials
US3989965A (en) * 1973-07-27 1976-11-02 Westinghouse Electric Corporation Acoustic transducer with damping means
DE3137745A1 (de) * 1981-09-23 1983-04-07 Egon 5000 Köln Gelhard Sensor fuer die durchfuehrung der distanzmessung nach dem ultraschalll-echoprinzip
US4746831A (en) * 1985-03-27 1988-05-24 Kaijo Denki Co., Ltd. Ultrasonic transreceiver
DE19744229A1 (de) * 1997-10-07 1999-04-29 Bosch Gmbh Robert Ultraschallwandler
US6217530B1 (en) * 1999-05-14 2001-04-17 University Of Washington Ultrasonic applicator for medical applications
DE10023302C2 (de) * 2000-05-15 2003-11-13 Grieshaber Vega Kg Piezoelektrisch erregbares Schwingelement
ATE289058T1 (de) * 2002-03-01 2005-02-15 Sick Engineering Gmbh Ultraschallwandleranordnung mit ultraschallfilter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1086640A (en) * 1963-12-16 1967-10-11 Nat Res Dev Damping backing for piezo-electric crystal or transducer
US4162111A (en) * 1977-08-25 1979-07-24 E. I. Du Pont De Nemours And Company Piezoelectric ultrasonic transducer with damped housing
JPS6194496A (ja) * 1984-10-16 1986-05-13 Nissan Motor Co Ltd 超音波マイクロフオン
EP0897101A1 (fr) * 1997-08-14 1999-02-17 Electrowatt Technology Innovation AG Débitmètre à ultrason
DE10040344A1 (de) * 2000-08-17 2002-02-28 Sick Ag Ultraschallwandler

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 010, no. 272 (E - 437) 16 September 1986 (1986-09-16) *
PATENT ABSTRACTS OF JAPAN vol. 013, no. 231 (P - 878) 29 May 1989 (1989-05-29) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008147325A1 (fr) * 2007-06-01 2008-12-04 Axsensor Ab Dispositif transducteur piézoélectrique
US8179024B2 (en) 2007-06-01 2012-05-15 Axsensor Ab Piezoelectric transducer device
DE102012209238A1 (de) * 2012-05-31 2013-12-05 Robert Bosch Gmbh Ultraschallsensor sowie Vorrichtung und Verfahren zur Messung eines Abstands zwischen einem Fahrzeug und einem Hindernis
US9383443B2 (en) 2012-05-31 2016-07-05 Robert Bosch Gmbh Ultrasonic sensor and device and method for measuring a distance between a vehicle and an obstacle

Also Published As

Publication number Publication date
DE502004001520D1 (de) 2006-11-02
ATE340398T1 (de) 2006-10-15
PL1515303T3 (pl) 2007-01-31
ES2271748T3 (es) 2007-04-16
DE10341422A1 (de) 2005-03-31
EP1515303B1 (fr) 2006-09-20
US20050054932A1 (en) 2005-03-10

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