DE3833158A1 - Bistable bending (flexural) transducer - Google Patents
Bistable bending (flexural) transducerInfo
- Publication number
- DE3833158A1 DE3833158A1 DE3833158A DE3833158A DE3833158A1 DE 3833158 A1 DE3833158 A1 DE 3833158A1 DE 3833158 A DE3833158 A DE 3833158A DE 3833158 A DE3833158 A DE 3833158A DE 3833158 A1 DE3833158 A1 DE 3833158A1
- Authority
- DE
- Germany
- Prior art keywords
- bending
- bistable
- transducer according
- bending transducer
- bending element
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H57/00—Electrostrictive relays; Piezo-electric relays
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N30/00—Piezoelectric or electrostrictive devices
- H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
- H10N30/204—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using bending displacement, e.g. unimorph, bimorph or multimorph cantilever or membrane benders
- H10N30/2041—Beam type
Abstract
Description
Die vorliegende Erfindung betrifft einen bistabilen Biege wandler mit einem piezoelektrischen, streifenförmigen Biege element, das durch Anlegen einer Spannung durchbiegbar ist.The present invention relates to a bistable bend transducer with a piezoelectric, strip-shaped bend element that can be deflected by applying a voltage.
Für Ventile, Relais und Vakuumschalter werden häufig piezo elektrische Biegewandler eingesetzt. Ein Biegewandler besteht im allgemeinen aus zwei dünnen piezokeramischen Schichten, die durch Klebung zu einer Doppelschicht verbunden sind. Durch An legen einer elektrischen Spannung an eine derartige Struktur entstehen in den einzelnen Schichten des Biegewandlers entgegen gesetzte Deformationen, die ähnlich wie bei einem Bimetall eine starke Krümmung des Verbundes bewirken. Besonders nachteilig wirkt sich bei dieser Art von Biegewandlern aus, daß bei Zurücknahme der elektrischen Spannung auf den Wert Null eine in ihrer Größe von den vorangegangenen Elongationszyklen abhängige Restauslenkung bestehen bleibt, die darüber hinaus zeitlich nicht konstant bleibt (Nullpunktdrift).For valves, relays and vacuum switches, piezo are often used electric bending transducers used. A bending transducer exists in generally of two thin piezoceramic layers that are bonded to form a double layer. By To apply an electrical voltage to such a structure arise in the individual layers of the bending transducer set deformations, similar to a bimetal one cause strong curvature of the composite. Particularly disadvantageous affects this type of bending transducers that at Reduction of the electrical voltage to the value zero one in their size depends on the previous elongation cycles Residual deflection remains, which is also temporal does not remain constant (zero point drift).
Zur Vermeidung dieser Restauslenkung und der Nullpunktdrift werden in bekannten Anordnungen aufwendige, regelbare piezo elektrische Biegewandler mit integrierten Dehnungsmeßstreifen mit zugehöriger Elektronik verwendet.To avoid this residual deflection and zero drift are complex, controllable piezo in known arrangements electric bending transducers with integrated strain gauges used with associated electronics.
Es sind auch Bimetall-Anordnungen zur Verwendung in Ventilen, Relais und Vakuumschalter bekannt, die jedoch eine große An sprechzeit, einen hohen Energieverbrauch und eine starke Temperaturabhängigkeit besitzen.There are also bimetallic arrangements for use in valves, Relays and vacuum switches are known, but they are a major concern talk time, high energy consumption and strong Have temperature dependency.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen bi stabilen Biegewandler zu schaffen, der bei sehr einfachem und damit kostengünstigem Aufbau die eingangs genannten Nachteile bekannter Biegewandler vermeidet. The present invention has for its object a bi to create stable bending transducer that is very simple and thus inexpensive construction the disadvantages mentioned above known bending transducer avoids.
Zur Lösung dieser Aufgabe wird ein bistabiler Biegewandler der eingangs genannten Art und gemäß dem Oberbegriff des Patent anspruchs 1 vorgeschlagen, der durch die in dem kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmale charakterisiert ist.A bistable bending transducer is used to solve this task type mentioned and according to the preamble of the patent claim 1 proposed by the in the characterizing Characterized part of claim 1 specified features is.
Vorteilhafte Weiterbildungen der Erfindung sind durch die in den Unteransprüchen angegebenen Merkmale gekennzeichnet.Advantageous developments of the invention are characterized by the in the features specified in the subclaims.
Im folgenden wird die Erfindung anhand einer Figur im einzelnen beschrieben.In the following the invention with reference to a figure in described.
Die Figur zeigt eine schematische Darstellung eines erfindungs gemäßen Biegewandlers gemäß einem bevorzugten Ausführungsbeispiel.The figure shows a schematic representation of an invention according bending transducer according to a preferred embodiment.
Wie die Figur zeigt, besteht ein erfindungsgemäßer Biegewandler W gemäß dem bevorzugten Ausführungsbeispiel aus einem längsgeführten, beweglich gelagerten Biegeelement B, des durch Federkräfte F, F′ so belastet ist, daß es sich auswölbt. Bei Anlegen einer elektrischen Spannung u springt die Auswölbung des Biege elements B in die entgegengesetzte Lage. Zur Vermeidung eines Bruchs durch eine zu weitgehende Biegung ist auf jeder Seite des Biegeelements B ein Anschlag A bzw. A′ vorgesehen. Zur Rückführung des Biegeelements B in die Ursprungslage wird eine Spannung umgekehrter Polarität an das Biegeelement B gelegt. Zum Umschalten der Lage auf der einen Anschlagseite zu der Lage auf der anderen Anschlagseite ist jeweils nur ein kurzer elektrischer Impuls notwendig.As the figure shows, a bending transducer W according to the preferred embodiment consists of a longitudinally guided, movably mounted bending element B , which is loaded by spring forces F , F 'so that it bulges. When an electrical voltage u is applied , the bulge of the bending element B jumps into the opposite position. To avoid breakage due to excessive bending, a stop A or A 'is provided on each side of the bending element B. In order to return the bending element B to the original position, a voltage of reversed polarity is applied to the bending element B. To switch the position on one side of the stop to the position on the other side of the stop, only a short electrical pulse is required.
Unter anderem besteht der Vorteil des erfindungsgemäßen Biege wandlers darin, daß ein im Bereich der weitestgehenden Auswölbung befestigter Kontakt oder eine Ventilplatte mit Vorspannung an dem Gegenkontakt oder der Ventilöffnung anliegt, um eine sichere Kontaktgabe oder eine sichere Ventilschließung zu bewirken. Among other things, there is the advantage of the bending according to the invention converter in that one in the area of the most extensive bulge attached contact or a valve plate with preload the mating contact or the valve opening to ensure a safe To make contact or secure valve closure.
Praktische Versuche haben folgende Werte ergeben:
Keramik: VIBRIT 420 - Einzellamelle, Abmessungen 0,3×8×90 mm
Knickgrenzlast: 18 N, Knickauslenkung: 0,9 mm
Längsverkürzung: 24 µm, Spannungsimpuls: 150 V
Anschlagkraft: einige 10 p
Diese Versuchsergebnisse beziehen sich auf einen funk
tionsfähigen Prototyp. Die Auswahl des Keramik-Werk
stoffs sowie der Abmessungen des Biegeelementes ist
jeweils vom Anwendungsfall bestimmt.Practical tests have shown the following values:
Ceramic: VIBRIT 420 - single lamella, dimensions 0.3 × 8 × 90 mm
Buckling limit load: 18 N, buckling deflection: 0.9 mm
Longitudinal shortening: 24 µm, voltage pulse: 150 V
Velocity: some 10 p
These test results relate to a functional prototype. The selection of the ceramic material and the dimensions of the bending element is determined by the application.
Claims (13)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3833158A DE3833158A1 (en) | 1988-09-29 | 1988-09-29 | Bistable bending (flexural) transducer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3833158A DE3833158A1 (en) | 1988-09-29 | 1988-09-29 | Bistable bending (flexural) transducer |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3833158A1 true DE3833158A1 (en) | 1990-04-12 |
Family
ID=6364027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3833158A Withdrawn DE3833158A1 (en) | 1988-09-29 | 1988-09-29 | Bistable bending (flexural) transducer |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3833158A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998011586A1 (en) * | 1996-09-13 | 1998-03-19 | Thomson-Csf | Electric switching device and display device using same |
EP1014416A2 (en) * | 1998-12-24 | 2000-06-28 | ABB Ricerca SpA | Residual-current device |
DE10013821A1 (en) * | 2000-03-17 | 2001-09-27 | East 4D Gmbh Lightweight Struc | Function multistable hybrid compound as force and displacement converter, has functional material that can be driven inserted into multilayer compound for introducing deformation energy |
DE10040867A1 (en) * | 2000-08-21 | 2002-05-23 | Abb Research Ltd | Microswitch has contact bearer deformable parallel to substrate with shape of symmetrical oscillation trough in stable off position, shape of asymmetrical trough in stable on position |
DE10310072B4 (en) * | 2002-03-08 | 2005-07-14 | Erhard Prof. Dr.-Ing. Kohn | Micromechanical actuator |
DE102005028970A1 (en) * | 2005-06-22 | 2006-12-28 | Siemens Ag | Piezoelectric actuator for e.g. pneumatic valve, has prestressing device adjusting mechanical prestressing of piezoelectric layer over bulge such that prestressing supports expansion behavior of actuator during generation of electric field |
DE102005028976A1 (en) * | 2005-06-22 | 2006-12-28 | Siemens Ag | Piezoelectric actuator for e.g. pneumatic valve, has piezoelectric layer between two electrode layers, where electric field produced in piezoelectric layer produces different expansion states in piezoelectric layer and other layer |
DE102017109575B4 (en) * | 2016-05-04 | 2020-10-01 | Infineon Technologies Ag | A MICROELECTROMECHANICAL DEVICE, AN ARRANGEMENT OF MICROELECTROMECHANICAL DEVICES, A METHOD FOR PRODUCING A MICROELECTROMECHANICAL DEVICE AND A METHOD FOR OPERATING A MICROELECTROMECHANICAL DEVICE |
DE102017126644B4 (en) * | 2017-11-13 | 2020-11-12 | Infineon Technologies Ag | Membrane element assembly and method therefor |
-
1988
- 1988-09-29 DE DE3833158A patent/DE3833158A1/en not_active Withdrawn
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2753565A1 (en) * | 1996-09-13 | 1998-03-20 | Thomson Csf | ELECTRIC SWITCHING DEVICE AND DISPLAY DEVICE USING THE SWITCHING DEVICE |
WO1998011586A1 (en) * | 1996-09-13 | 1998-03-19 | Thomson-Csf | Electric switching device and display device using same |
EP1014416A3 (en) * | 1998-12-24 | 2001-12-12 | ABB Ricerca SpA | Residual-current device |
EP1014416A2 (en) * | 1998-12-24 | 2000-06-28 | ABB Ricerca SpA | Residual-current device |
DE10013821B4 (en) * | 2000-03-17 | 2004-01-29 | Technische Universität Dresden | Multi-functional Hybrid Hybrid (FMH) as a force and path translator |
DE10013821A1 (en) * | 2000-03-17 | 2001-09-27 | East 4D Gmbh Lightweight Struc | Function multistable hybrid compound as force and displacement converter, has functional material that can be driven inserted into multilayer compound for introducing deformation energy |
DE10040867A1 (en) * | 2000-08-21 | 2002-05-23 | Abb Research Ltd | Microswitch has contact bearer deformable parallel to substrate with shape of symmetrical oscillation trough in stable off position, shape of asymmetrical trough in stable on position |
US6743989B2 (en) | 2000-08-21 | 2004-06-01 | Abb Research Ltd. | Microswitch |
DE10310072B4 (en) * | 2002-03-08 | 2005-07-14 | Erhard Prof. Dr.-Ing. Kohn | Micromechanical actuator |
DE102005028970A1 (en) * | 2005-06-22 | 2006-12-28 | Siemens Ag | Piezoelectric actuator for e.g. pneumatic valve, has prestressing device adjusting mechanical prestressing of piezoelectric layer over bulge such that prestressing supports expansion behavior of actuator during generation of electric field |
DE102005028976A1 (en) * | 2005-06-22 | 2006-12-28 | Siemens Ag | Piezoelectric actuator for e.g. pneumatic valve, has piezoelectric layer between two electrode layers, where electric field produced in piezoelectric layer produces different expansion states in piezoelectric layer and other layer |
DE102017109575B4 (en) * | 2016-05-04 | 2020-10-01 | Infineon Technologies Ag | A MICROELECTROMECHANICAL DEVICE, AN ARRANGEMENT OF MICROELECTROMECHANICAL DEVICES, A METHOD FOR PRODUCING A MICROELECTROMECHANICAL DEVICE AND A METHOD FOR OPERATING A MICROELECTROMECHANICAL DEVICE |
DE102017126644B4 (en) * | 2017-11-13 | 2020-11-12 | Infineon Technologies Ag | Membrane element assembly and method therefor |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8139 | Disposal/non-payment of the annual fee |