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 PDFInfo
- 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
Links
- 238000013016 damping Methods 0.000 title claims description 13
- 238000002604 ultrasonography Methods 0.000 title claims description 9
- 230000002452 interceptive effect Effects 0.000 title description 2
- 239000012528 membrane Substances 0.000 claims abstract description 24
- 239000013013 elastic material Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000003071 parasitic effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- -1 For example Substances 0.000 description 1
- 108010076504 Protein Sorting Signals Proteins 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
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)
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)
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)
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)
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)
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 |
-
2003
- 2003-09-09 DE DE10341422A patent/DE10341422A1/de not_active Withdrawn
-
2004
- 2004-07-21 DE DE502004001520T patent/DE502004001520D1/de not_active Expired - Lifetime
- 2004-07-21 PL PL04017189T patent/PL1515303T3/pl unknown
- 2004-07-21 ES ES04017189T patent/ES2271748T3/es not_active Expired - Lifetime
- 2004-07-21 EP EP04017189A patent/EP1515303B1/fr not_active Expired - Lifetime
- 2004-07-21 AT AT04017189T patent/ATE340398T1/de active
- 2004-09-08 US US10/936,979 patent/US20050054932A1/en not_active Abandoned
Patent Citations (5)
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)
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)
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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