EP1493302B1 - Sound or ultrasound sensor - Google Patents
Sound or ultrasound sensor Download PDFInfo
- Publication number
- EP1493302B1 EP1493302B1 EP03724986A EP03724986A EP1493302B1 EP 1493302 B1 EP1493302 B1 EP 1493302B1 EP 03724986 A EP03724986 A EP 03724986A EP 03724986 A EP03724986 A EP 03724986A EP 1493302 B1 EP1493302 B1 EP 1493302B1
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- EP
- European Patent Office
- Prior art keywords
- sound
- matching layer
- ultrasound
- piezoelectric element
- floor
- 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.)
- Expired - Lifetime
Links
- 238000002604 ultrasonography Methods 0.000 title claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract 2
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000013016 damping Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000005855 radiation Effects 0.000 abstract description 6
- 230000010355 oscillation Effects 0.000 description 4
- 239000004033 plastic Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
Definitions
- the invention relates to a sound or ultrasonic sensor for transmitting and / or receiving sound or ultrasound.
- Ultrasonic sensors are used e.g. used as transmitter and / or receiver for distance measurement according to the echosounding principle, in particular for measuring a filling level, e.g. in a container, or to measure a level, e.g. in a channel or on a conveyor belt.
- An emitted by the sonic or ultrasonic sensor pulse is reflected at the surface of the filling.
- the duration of the pulse from the sensor to the surface and back is determined and used to determine the fill level or fill level.
- Such sonic or ultrasonic sensors are used in many industries, e.g. used in the food industry, the water and wastewater sector and in chemistry.
- the sensors In almost all applications, it is necessary that the sensors have a radiation characteristic with a small opening angle of a main sound lobe and simultaneously low side lobes.
- the opening angle of the sensor is essentially determined by the diameter of the front surface and the frequency.
- the sine of the opening angle of the radiated sound lobe behaves as the quotient of the wavelength of the radiated sound or ultrasonic wave and the diameter of the front surface of the radiating element. In order to obtain a sound beam with a small opening angle, therefore, a large diameter is used.
- the ring and the piezoelectric element thereby form a uniformly vibrating vibration structure.
- the opening angle of the sound lobe is therefore here the larger outer diameter of the ring and not the diameter of the piezoelectric element.
- sound and ultrasound pulses can be transmitted and received by the housing wall when the housing wall resonates with it. This can lead to false echoes.
- the sound or ultrasound can also be transmitted as structure-borne noise to the housing and, moreover, to a holder of the sensor and possibly even to other components at the place of use. This can also lead to significant interference signals.
- the matching layer has an annular peripheral groove on its outer edge on its side facing away from the bottom.
- the groove has a depth at which a coupling to the housing is low.
- a damping material is provided in the housing.
- Advantages of the invention are that there is practically no transmission of sound or ultrasound to the housing. Corresponding interference signals therefore practically no longer occur.
- an effective diameter of the radiating surface which is relevant for determining the aperture angle of the radiation characteristic is almost equal to the diameter of the matching layer.
- a bottom side of the matching layer has a waveform that corresponds to a Gaussian line over almost the entire diameter. Accordingly, the opening angle is small.
- Fig. 1 shows a longitudinal section through a sound or ultrasonic sensor according to the invention for transmitting and / or receiving sound or ultrasound.
- Fig. 2 shows a longitudinal section through the piezoelectric element and the matching layer of Fig. 1 ,
- the sonic or ultrasonic sensor has a cup-shaped housing 1, which is closed off by a bottom 3.
- the housing 1 is made of a plastic, e.g. made of polypropylene.
- a piezoelectric element 5 is arranged, which serves for the generation and / or recording of sound or ultrasound through the bottom 3 therethrough.
- a matching layer 7 is arranged in front of the piezoelectric element 5 of a plastic having a mean acoustic impedance.
- plastic e.g. an epoxy resin suitable.
- the piezoelectric element 5 is disk-shaped.
- the matching layer 7 is likewise disc-shaped and is located between the piezoelectric element 5 and the bottom 3 of the housing 1.
- the matching layer 7 preferably has a thickness which corresponds to one quarter of the wavelength of the generated sound or ultrasound waves.
- the matching layer 7 is surrounded by a metallic ring 9, which surrounds the matching layer 7 in a form-fitting manner.
- the ring 9 consists e.g. made of brass. It stabilizes the matching layer 7 at its outer edge and causes vibrations of the matching layer 7 are virtually no longer transferred to the housing 1.
- the fixed clamping of the matching layer 7 at its edge by the ring 9 prevents the matching layer 7 in an outer edge region from deforming.
- the fitting layer 7 therefore preferably has an annular peripheral groove 11 at its outer edge on its side facing away from the ground.
- An outer lateral boundary of the groove 11 can, as in Fig. 1 shown to be part of the matching layer 7.
- the ring 9 may form the outer lateral boundary of the groove 11.
- the groove 11 therefore preferably has a maximum depth at which a coupling to the housing 1 is low.
- the matching layer 7 for example, a diameter of about 50 mm and the groove 11 has a width of for example about 5 mm.
- An optimal depth of the groove 11 is approximately 5 mm in this embodiment.
- a damping material 13 is therefore preferably provided in the housing 1.
- the damping material 13 is e.g. a potting, for example, a silicone gel, which fills the housing 1.
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Transducers For Ultrasonic Waves (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Geophysics And Detection Of Objects (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
Die Erfindung betrifft einen Schall- oder Ultraschallsensor zum Senden und/oder Empfangen von Schall- oder Ultraschall. Ultraschallsensoren werden z.B. als Sender und/oder Empfänger zur Entfernungsmessung nach dem Echolotprinzip verwendet, insb. zur Messung eines Füllstands, z.B. in einem Behälter, oder zur Messung einer Füllhöhe, z.B. in einem Gerinne oder auf einem Förderband.The invention relates to a sound or ultrasonic sensor for transmitting and / or receiving sound or ultrasound. Ultrasonic sensors are used e.g. used as transmitter and / or receiver for distance measurement according to the echosounding principle, in particular for measuring a filling level, e.g. in a container, or to measure a level, e.g. in a channel or on a conveyor belt.
Ein vom Schall- oder Ultraschallsensor ausgesendeter Impuls wird an der Oberfläche des Füllgutes reflektiert. Die Laufzeit des Impulses vom Sensor zur Oberfläche und zurück wird ermittelt und daraus der Füllstand bzw. die Füllhöhe bestimmt.An emitted by the sonic or ultrasonic sensor pulse is reflected at the surface of the filling. The duration of the pulse from the sensor to the surface and back is determined and used to determine the fill level or fill level.
Derartige Schall- oder Ultraschallsensoren werden in vielen Industriezweigen, z.B. in der Lebensmittelindustrie, der Wasser- und Abwasserbranche und in der Chemie, eingesetzt.Such sonic or ultrasonic sensors are used in many industries, e.g. used in the food industry, the water and wastewater sector and in chemistry.
In fast allen Anwendungsbereichen ist es erforderlich, daß die Sensoren eine Abstrahlcharakteristik mit einem geringen Öffnungswinkel einer Hauptschallkeule und gleichzeitig geringen Nebenschallkeulen aufweisen.In almost all applications, it is necessary that the sensors have a radiation characteristic with a small opening angle of a main sound lobe and simultaneously low side lobes.
Der Öffnungswinkel des Sensor ist im wesentlichen durch den Durchmesser der Frontfläche und die Frequenz bestimmt. Dabei verhält sich der Sinus des Öffnungswinkels der abgestrahlten Schallkeule wie der Quotient aus der Wellenlänge der abgestrahlten Schall- oder Ultraschallwelle und dem Durchmesser der Frontfläche des Abstrahlelements. Um eine Schallkeule mit kleinem Öffnungswinkel zu erhalten, ist daher ein großer Durchmesser zu verwenden.The opening angle of the sensor is essentially determined by the diameter of the front surface and the frequency. In this case, the sine of the opening angle of the radiated sound lobe behaves as the quotient of the wavelength of the radiated sound or ultrasonic wave and the diameter of the front surface of the radiating element. In order to obtain a sound beam with a small opening angle, therefore, a large diameter is used.
Andererseits erreicht man eine gute Abstrahlcharakteristik mit geringen Nebenkeulen durch eine Biegeform eines abstrahlenden Elements, deren Amplitudenverteilung nahezu einer Gaußfunktion entspricht und bei der außerdem die Phase der Schwingung über die gesamte Fläche gleich ist. Je größer die Halbwertsbreite dieser Gaußkurve ist, umso schmaler wird die Haupkeule sein. Es gilt also eine Schwingungsform zu erzeugen, bei der die zur Verfügung stehenden abstrahlende Fläche optimal genutzt wird.On the other hand, a good emission characteristic with small side lobes is achieved by a bending form of a radiating element, the amplitude distribution of which corresponds almost to a Gaussian function and in which, moreover, the phase of the oscillation is the same over the entire surface. The larger the half width of this Gaussian curve, the narrower the main lobe will be. It is therefore necessary to generate a waveform in which the available radiating surface is used optimally.
In der
- einem piezoelektrischen Element zur Erzeugung und/oder Aufnahme von Schall oder Ultraschall durch den Boden hindurch,
- einer Anpaßschicht zwischen dem piezoeelektrischen Element und dem Boden, und
- einem metallischen Ring der das piezoelektrische Element kraft- und formschlüssig umgreift.
- a piezoelectric element for generating and / or receiving sound or ultrasound through the ground,
- a matching layer between the piezoelectric element and the bottom, and
- a metallic ring which surrounds the piezoelectric element non-positively and positively.
Der Ring und das piezoelektrische Element bilden dabei ein einheitlich schwingendes Schwingungsgebilde. Bei der Berechnung des Öffnungswinkels der Schallkeule geht daher hier der größere Außendurchmesser des Rings und nicht der Durchmesser des piezoelektrischen Elements ein.The ring and the piezoelectric element thereby form a uniformly vibrating vibration structure. In the calculation of the opening angle of the sound lobe is therefore here the larger outer diameter of the ring and not the diameter of the piezoelectric element.
Desweiteren ist in der
Zusätzlich gilt es aber auch, Schall- oder Ultraschallschwingungen von seitlichen Gehäuseteilen fern zu halten. Zum einen können bei einem Mitschwingen der Gehäusewand von dieser selbst Schall- oder Ultraschallimpulse ausgesendet und empfangen werden. Dies kann zu Störechos führen. Zum anderen kann der Schall- oder Ultraschall auch als Körperschall auf das Gehäuse und darüber auf eine Halterung des Sensors und gegebenenfalls sogar auf weitere Bauteile am Einsatzort übertragen werden. Dies kann ebenfalls zu erheblichen Störsignalen führen.In addition, it is also important to keep sound or ultrasonic vibrations away from the sides of the housing. On the one hand, sound and ultrasound pulses can be transmitted and received by the housing wall when the housing wall resonates with it. This can lead to false echoes. On the other hand, the sound or ultrasound can also be transmitted as structure-borne noise to the housing and, moreover, to a holder of the sensor and possibly even to other components at the place of use. This can also lead to significant interference signals.
Es ist eine Aufgabe der Erfindung, einen Schall- oder Ultraschallsensor anzugeben, der eine Abstrahl-charakteristik mit einem vorzugsweise geringen Öffnungswinkel aufweist und möglichst wenig Störsignale erzeugt.It is an object of the invention to provide a sound or ultrasonic sensor which has a radiation characteristic with a preferably small opening angle and generates as few interference signals as possible.
Hierzu besteht die Erfindung in einem Schall- oder Ultraschallsensor zum Senden und/oder Empfangen von Schall- oder Ultraschall
- mit einem von einem Boden topfförmig abgeschlossenen Gehäuse,
- einem piezoelektrischen Element zur Erzeugung und/oder Aufnahme von Schall oder Ultraschall durch den Boden hindurch,
- einer Anpaßschicht zwischen dem piezoeelektrischen Element und dem Boden, und
- einem metallischen Ring der die Anpaßschicht
- with a pot-shaped housing closed off from the bottom,
- a piezoelectric element for generating and / or receiving sound or ultrasound through the ground,
- a matching layer between the piezoelectric element and the bottom, and
- a metallic ring of the matching layer
Gemäß einer Weiterbildung weist die Anpaßschicht an deren äußerem Rand auf deren bodenabgewandten Seite eine ringförmig umlaufende Nut auf.According to a development, the matching layer has an annular peripheral groove on its outer edge on its side facing away from the bottom.
Gemäß einer Weiterbildung weist die Nut eine Tiefe auf, bei der eine Ankopplung an das Gehäuse gering ist.According to a development, the groove has a depth at which a coupling to the housing is low.
Gemäß einer Ausgestaltung ist in dem Gehäuse ein Dämpfungsmaterial vorgesehen.According to one embodiment, a damping material is provided in the housing.
Vorteile der Erfindung bestehen darin, daß praktische keine Übertragung von Schall bzw. Ultraschall auf das Gehäuse erfolgt. Entsprechende Störsignale treten daher praktisch nicht mehr auf.Advantages of the invention are that there is practically no transmission of sound or ultrasound to the housing. Corresponding interference signals therefore practically no longer occur.
Gleichzeitig ist durch die Nut sichergestellt, daß ein effektiver für die Bestimmung des Öffnungswinkel der Abstrahlcharaktristik relevanter Durchmesser der abstrahlenden Fläche nahezu gleich dem Durchmesser der Anpaßschicht ist. Eine Bodenseite der Anpaßschicht besitzt eine Schwingungsform, die einer Gaußlinie über nahezu den gesamten Durchmesser entspricht. Entsprechend ist der Öffnungswinkel gering. Es findet eine gut gebündelte gerichtete Abstrahlung statt. Die Gefahr von Streusignalen und Reflektionen, z.B. an Wänden von Behältern, in denen der Sensor eingebaut ist, ist daher gering.At the same time, it is ensured by the groove that an effective diameter of the radiating surface which is relevant for determining the aperture angle of the radiation characteristic is almost equal to the diameter of the matching layer. A bottom side of the matching layer has a waveform that corresponds to a Gaussian line over almost the entire diameter. Accordingly, the opening angle is small. There is a well-focused directional radiation. The risk of stray signals and reflections, e.g. on walls of containers in which the sensor is installed is therefore low.
Die Erfindung und weitere Vorteile werden nun anhand der Figuren der Zeichnung, in denen ein Ausführungsbeispiel dargestellt ist, näher erläutert; gleiche Elemente sind in den Figuren mit gleichen Bezugszeichen versehen.
- Fig. 1
- zeigt einen Längsschnitt durch einen Schall- oder Ultraschallsensor;
und - Fig. 2
- zeigt einen Längsschnitt durch das piezoelektrische Element und die Anpaßschicht von
Fig. 1 .
- Fig. 1
- shows a longitudinal section through a sound or ultrasonic sensor;
and - Fig. 2
- shows a longitudinal section through the piezoelectric element and the matching layer of
Fig. 1 ,
Der Schall- oder Ultraschallsensor weist ein topfförmiges Gehäuse 1 auf, das von einem Boden 3 abgeschlossenen ist.The sonic or ultrasonic sensor has a cup-shaped housing 1, which is closed off by a bottom 3.
Das Gehäuse 1 besteht aus einem Kunststoff, z.B. aus Polypropylen. In dem Gehäuse 1 ist ein piezoelektrisches Element 5 angeordnet, das zur Erzeugung und/oder Aufnahme von Schall oder Ultraschall durch den Boden 3 hindurch dient.The housing 1 is made of a plastic, e.g. made of polypropylene. In the housing 1, a
Da sich die akustische Impedanz des Mediums, in das der Schall oder Ultraschall auszusenden ist, z.B. Luft, und die des piezoelektrischen Elements 5 sehr stark unterscheiden, ist vor dem piezoelektrischen Element 5 eine Anpaßschicht 7 aus einem Kunststoff mit mittlerer akustischer Impedanz angeordnet. Als Kunststoff ist z.B. ein Epoxidharz geeignet. In dem dargestellten Ausführungsbeispiel ist das piezoelektrische Element 5 scheibenförmig. Die Anpaßschicht 7 ist ebenfalls scheibenförmig und befindet sich zwischen dem piezoelektrischen Elment 5 und dem Boden 3 des Gehäuses 1.Since the acoustic impedance of the medium into which the sound or ultrasound is to be emitted, e.g. Air, and those of the
Um eine möglichst gute Anpassung und damit einen möglichst hohen Schalldruck zu erzielen weist die Anpaßschicht 7 vorzugsweise eine Dicke auf, die einem viertel der Wellenlänge der erzeugten Schall- oder Ultraschalwellen entspricht.In order to achieve the best possible adaptation and thus the highest possible sound pressure, the
Die Anpaßschicht 7 ist von einem metallischen Ring 9 umgeben, der die Anpaßschicht 7 formschlüssig umgreift. Der Ring 9 besteht z.B. aus Messing. Er stabilisiert die Anpaßschicht 7 an deren äußerem Rand und bewirkt, daß Schwingungen der Anpaßschicht 7 praktisch nicht mehr auf das Gehäuse 1 übertragen werden.The
Störungen, die bei herkömmlichen Sensoren durch das Gehäuse vermittelt und/oder übertragen werden, treten hier praktisch nicht mehr auf.Disturbances that are transmitted and / or transmitted through the housing in the case of conventional sensors virtually no longer occur here.
Die feste Einspannung der Anpaßschicht 7 an deren Rand durch den Ring 9 hindert die Anpaßschicht 7 jedoch in einem äußeren Randbereich daran, sich zu verformen.However, the fixed clamping of the
Um dennoch die angestrebte Gaußsche Biegelinie mit einer möglichst großen Halbwertsbreite zu erhalten, weist die Anpaßschicht 7 daher an deren äußerem Rand auf deren bodenabgewandten Seite vorzugsweise ein ringförmig umlaufende Nut 11 auf. Eine äußere seitliche Begrenzung der Nut 11 kann dabei, wie in
Untersuchungen haben gezeigt, daß die Halbwertsbreite der Abstrahlfläche mit zunehmender Tiefe T der Nut ansteigt. Hinsichtlich einer Ankopplung an das Gehäuse 1 weist die Tiefe jedoch ein Optimum auf. Die Nut 11 weist daher vorzugsweise eine maximale Tiefe auf, bei der eine Ankopplung an das Gehäuse 1 gering ist.Studies have shown that the half-width of the radiating surface increases with increasing depth T of the groove. With regard to a coupling to the housing 1, however, the depth has an optimum. The
Nachfolgend ist ein Beispiel für Abmessungen der Komponenten eines erfindungsgemäßen Schall- oder Ultraschallsensor angegeben. Bei einem piezoelektrischen Element 5 mit einem Durchmesser von ca. 40 mm weist die Anpaßschicht 7 beispielsweise einen Durchmesser von ca. 50 mm auf und die Nut 11 hat eine Breite von beispielsweise ca. 5 mm. Eine optimale Tiefe der Nut 11 beträgt bei diesem Ausführungsbeispiel ca. 5 mm.The following is an example of dimensions of the components of a sound or ultrasonic sensor according to the invention. In a
Bei einem Schall- oder Ultraschallsensor, der nicht nur als Sender, sondern auch als Empfänger genutzt wird, ist es wichtig, daß eine einmal angeregte Sendeschwingung schnell abklingt. Erst nach einem vollständigen Abklingen der Sendeschwingung ist der Schall- oder Ultraschallsensor empfangsbereit. Um ein schnelles Abklingen der Sendeschwingung zu erzielen ist in dem Gehäuse 1 daher vorzugsweise ein Dämpfungsmaterial 13 vorgesehen. Das Dämpfungsmaterial 13 ist z.B. ein Verguß, beispielsweise ein Silikongel, der das Gehäuse 1 ausfüllt.In a sound or ultrasonic sensor, which is used not only as a transmitter, but also as a receiver, it is important that a once excited transmission oscillation decays quickly. Only after a complete decay of the transmission oscillation of the sound or ultrasonic sensor is ready to receive. In order to achieve a rapid decay of the transmission oscillation, a damping
Claims (4)
- Sound or ultrasound sensor for the transmission and/or reception of sound or ultrasound, comprising- a pot-shaped housing (1) closed below by a floor (3),- a piezoelectric element (5) for producing and/or receiving sound or ultrasound through the floor (3),- a matching layer (7) between the piezoelectric element (5) and the floor (3), and- a metal ring (9) gripping around the matching layer (7) and having an interlocking fit therewith.
- Sound or ultrasound sensor as claimed in claim 1, wherein the matching layer (7) has a groove (11) extending annularly at, and around, its outer edge, on the floor-far side thereof.
- Sound or ultrasound sensor as claimed in claim 2, wherein the groove has a depth (T), such that a coupling to the housing (1) is small.
- Sound or ultrasound sensor as claimed in claim 1, wherein a damping material (13) is present in the housing (1).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10216037A DE10216037A1 (en) | 2002-04-11 | 2002-04-11 | Sound or ultrasonic sensor |
| DE10216037 | 2002-04-11 | ||
| PCT/EP2003/003682 WO2003086011A1 (en) | 2002-04-11 | 2003-04-09 | Sound or ultrasound sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1493302A1 EP1493302A1 (en) | 2005-01-05 |
| EP1493302B1 true EP1493302B1 (en) | 2009-01-21 |
Family
ID=28458729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03724986A Expired - Lifetime EP1493302B1 (en) | 2002-04-11 | 2003-04-09 | Sound or ultrasound sensor |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US7190105B2 (en) |
| EP (1) | EP1493302B1 (en) |
| AT (1) | ATE421843T1 (en) |
| AU (1) | AU2003227585A1 (en) |
| CA (1) | CA2482141C (en) |
| DE (2) | DE10216037A1 (en) |
| WO (1) | WO2003086011A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102506929A (en) * | 2011-11-15 | 2012-06-20 | 上官明禹 | High-pressure-resistant air-coupled ultrasonic transducer and manufacturing method thereof |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2239500B1 (en) * | 2003-03-07 | 2006-12-01 | Consejo Sup. Investig. Cientificas | DEVICE FOR THE CHARACTERIZATION OF ULTRASOUND MATERIALS WITH GAS COUPLING (AIR) AND ITS APPLICATION TO CARRY OUT A NON-DESTRUCTIVE TEST TO VERIFY THE INTEGRITY OF POROUS MEMBRANES. |
| JP4618165B2 (en) * | 2006-03-06 | 2011-01-26 | 株式会社デンソー | Ultrasonic sensor |
| DE102006062706B4 (en) * | 2006-03-30 | 2012-12-06 | Krohne Ag | ultrasonic flowmeter |
| JP4656261B2 (en) * | 2008-12-04 | 2011-03-23 | 株式会社村田製作所 | Ultrasonic transducer |
| DE202013104569U1 (en) | 2013-10-09 | 2013-11-25 | Pepperl + Fuchs Gmbh | ultrasonic sensor |
| EP3288291B1 (en) * | 2015-04-20 | 2021-05-26 | Murata Manufacturing Co., Ltd. | Ultrasonic sensor |
| JP7168849B2 (en) | 2018-11-22 | 2022-11-10 | 日本電信電話株式会社 | Underwater acoustic communication system and receiver |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3950660A (en) * | 1972-11-08 | 1976-04-13 | Automation Industries, Inc. | Ultrasonic contact-type search unit |
| US3921442A (en) * | 1973-11-28 | 1975-11-25 | Automation Ind Inc | Acoustic couplant for use with an ultrasonic search unit |
| US4184094A (en) * | 1978-06-01 | 1980-01-15 | Advanced Diagnostic Research Corporation | Coupling for a focused ultrasonic transducer |
| US4297607A (en) * | 1980-04-25 | 1981-10-27 | Panametrics, Inc. | Sealed, matched piezoelectric transducer |
| DE3721209C2 (en) * | 1987-06-26 | 1997-04-30 | Grieshaber Vega Kg | Sound / ultrasonic measuring device |
| WO1994005004A1 (en) * | 1992-08-13 | 1994-03-03 | Siemens Aktiengesellschaft | Ultrasonic transducer |
| DE4311963C2 (en) * | 1993-04-10 | 1996-10-24 | Endress Hauser Gmbh Co | Level measuring device |
| DE4323134C1 (en) | 1993-07-10 | 1994-06-16 | Pil Sensoren Gmbh | Ultrasonic oscillator - has oversize matching body resting on support ring for acoustic dampening |
| DE4330745C1 (en) * | 1993-09-10 | 1995-04-27 | Siemens Ag | Ultrasonic transducer with adapter body |
| DE59510158D1 (en) * | 1995-09-28 | 2002-05-16 | Endress Hauser Gmbh Co | ultrasound transducer |
| JP3879264B2 (en) * | 1998-07-01 | 2007-02-07 | 株式会社村田製作所 | Ultrasonic sensor |
| WO2000030554A1 (en) * | 1998-11-20 | 2000-06-02 | Jones Joie P | Methods for selectively dissolving and removing materials using ultra-high frequency ultrasound |
-
2002
- 2002-04-11 DE DE10216037A patent/DE10216037A1/en not_active Withdrawn
-
2003
- 2003-04-09 EP EP03724986A patent/EP1493302B1/en not_active Expired - Lifetime
- 2003-04-09 DE DE50311120T patent/DE50311120D1/en not_active Expired - Lifetime
- 2003-04-09 AU AU2003227585A patent/AU2003227585A1/en not_active Abandoned
- 2003-04-09 US US10/509,685 patent/US7190105B2/en not_active Expired - Fee Related
- 2003-04-09 WO PCT/EP2003/003682 patent/WO2003086011A1/en not_active Application Discontinuation
- 2003-04-09 AT AT03724986T patent/ATE421843T1/en not_active IP Right Cessation
- 2003-04-09 CA CA002482141A patent/CA2482141C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102506929A (en) * | 2011-11-15 | 2012-06-20 | 上官明禹 | High-pressure-resistant air-coupled ultrasonic transducer and manufacturing method thereof |
| CN102506929B (en) * | 2011-11-15 | 2015-06-10 | 上官明禹 | High-pressure-resistant air-coupled ultrasonic transducer and manufacturing method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE50311120D1 (en) | 2009-03-12 |
| DE10216037A1 (en) | 2003-10-23 |
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| US7190105B2 (en) | 2007-03-13 |
| EP1493302A1 (en) | 2005-01-05 |
| ATE421843T1 (en) | 2009-02-15 |
| CA2482141C (en) | 2009-06-23 |
| US20060076854A1 (en) | 2006-04-13 |
| CA2482141A1 (en) | 2003-10-16 |
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