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EP1098180B1 - Apparatus for detecting an amount of displacement - Google Patents

Apparatus for detecting an amount of displacement

Info

Publication number
EP1098180B1
EP1098180B1 EP20000121126 EP00121126A EP1098180B1 EP 1098180 B1 EP1098180 B1 EP 1098180B1 EP 20000121126 EP20000121126 EP 20000121126 EP 00121126 A EP00121126 A EP 00121126A EP 1098180 B1 EP1098180 B1 EP 1098180B1
Authority
EP
European Patent Office
Prior art keywords
transmission
displacement
compression spring
sensing device
sensing
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
Application number
EP20000121126
Other languages
German (de)
French (fr)
Other versions
EP1098180A1 (en
Inventor
Helmut Plener
Günter Eisermann
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.)
MAN Truck and Bus SE
Robert Seuffer GmbH and Co KG
Original Assignee
Robert Seuffer GmbH and Co KG
MAN Nutzfahrzeuge AG
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 Robert Seuffer GmbH and Co KG, MAN Nutzfahrzeuge AG filed Critical Robert Seuffer GmbH and Co KG
Publication of EP1098180A1 publication Critical patent/EP1098180A1/en
Application granted granted Critical
Publication of EP1098180B1 publication Critical patent/EP1098180B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/52—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state immediately upon removal of operating force, e.g. bell-push switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/04—Cases; Covers
    • H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
    • H01H13/063—Casings hermetically closed by a diaphragm through which passes an actuating member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/052—Strain gauge

Definitions

  • the invention relates to a device for measuring the distance according to the preamble of claim 1.
  • Such from the EP-A-0 440 011 known device serves as a force, in particular pressure measuring device and has a permanently connected to a piston sensing device, which acts on the force to be measured.
  • the resulting piston movement is transmitted via an elastomeric material, in which the piston is embedded in a cup-shaped housing, on the deformable bottom of the cup-shaped housing.
  • a sensor which provides an electrical signal proportional to the deformation.
  • the deformable bottom forms a sensor cooperating surface which extends transversely to the direction of translation transmitted by the transmission.
  • the bottom can be formed as a membrane and the sensor can be formed by one or more strain gauges.
  • a pressure measuring device in which the pressure to be measured acts on a piston surface and the piston is displaced against the biasing force of a spring proportional to the pressure to be measured.
  • the object of the invention is to provide a device of the type mentioned, with which a touched by the sensing device linear displacement with simple Means is transmitted to the sensor having deformable part.
  • a helical compression spring of the transmission device and the sensing device have a common linear or axial guide, said guide being rod-shaped and extending in the interior of the helical compression spring and a sleeve-shaped part of the sensing device.
  • the deformable member may have a deformable surface cooperating with the sensor which extends transversely to the direction of the transmission means stretching shift.
  • the deformable part can form the bottom of a measuring cell, in which the Obertragungs worn is used.
  • the transfer device can have a transfer foot, which covers substantially the entire bottom of the cup-shaped measuring cell and is convexly curved on its surface facing the deformable part.
  • the scanning device is guided in a preferred manner in an adapter displaceable.
  • the adapter can be connected by a plug or screw connection or other suitable connection with a component, against which a displacement movement of another component is to be measured.
  • the sensing device comes into contact with the component whose displacement is to be detected or measured.
  • This may be, for example, a transmission part of a motor vehicle. Frictional forces resulting from the linear or axial guidance of the sensing device do not affect the measured variable. For example, by self-calibration, the Reibungshimfte can be compensated.
  • the adapter is suitably connected to a housing, in which the electronic evaluation device is arranged, which serves for the evaluation of the sensor signals.
  • This housing forms at the same time a protection against high-frequency interference and is preferably designed as it is in the DE 198 12 296 A1 is described. As a result, when used in a transmission, a transmission switch can be formed.
  • the device has a sensing device 1, which is guided in an adapter 10 in the axial direction displaceable.
  • the sensing device 1 has a sleeve-shaped or cylindrical part, which extends in the axial direction in the adapter 10 and also a probe with a touch surface 13, which is brought to a component to be monitored for scanning system.
  • the lateral surface of the cylindrical part of the sensing device 1 can for this purpose abut against a corresponding guide surface of the adapter 10, as can be seen from the figure.
  • a sleeve 8 may be provided, which is provided between the probe and the adapter 10.
  • a rod-shaped guide 5 extends inside the sensing device 1, a rod-shaped guide 5.
  • a helical compression spring 6 is wound.
  • the helical compression spring 6 is supported at its one end on a collar 14 of the sensing device 1 from.
  • the helical compression spring 6 is supported on a transmission foot 7.
  • the transfer foot 7 and the rod-shaped guide 5 are connected to each other firmly or with positive engagement.
  • a bias voltage is generated, with which the sensing device is biased in the axial direction.
  • a stop 17 may be provided on the inner wall of the measuring cell 9 for the collar 14.
  • the helical compression spring 6 and the transmission foot 7 form a transmission device 3, with which the axial displacement of the sensing device 1 is transmitted to a sensor 2.
  • the measuring transducer 2 has the deformable part 4, for example in the form of a disk or membrane.
  • a sensor On the side facing away from the support foot 7 surface of the deformable part 4 is a sensor, for example in the form of one or more resistance elements of semiconductor material, such as strain gauges, which connects to a measuring bridge could be.
  • the sensor can also interact capacitively with the deformable part 4. With an axial displacement of the sensing device 1, this is transmitted to the deformable part 4 via the compression spring 6 and the transfer foot 7.
  • the deformation is detected by the sensor of the encoder 2 and delivered a signal proportional to the deformation.
  • the deformation corresponds to the axial displacement of the sensing device 1.
  • a non-compressible medium such as a hydraulic fluid can be used, which forwards the axial displacement of the sensing device 1 and deforms the deformable part 4.
  • a friction force can, for. B. be compensated by self-calibration using a transmitter 12. The frictional forces then have no influence on the measuring signal.
  • the deformable part 4 may form the bottom surface of a cup-shaped measuring cell 9.
  • the measuring cell 9 has a circular cylindrical recess into which the transmission foot 7 is inserted.
  • the outer diameter of the transmission foot 7 can correspond approximately to the inner diameter of the recess in the measuring cell 9.
  • the deformable part 4 and the side wall of the measuring cell 9 can be made in one piece.
  • the deformable part 4 and the measuring cell 9 is made of a ceramic material.
  • the output from the encoder 2 sensor signals are evaluated by the transmitter 12 and can be forwarded via an electrical connector 15.
  • Der Sensor 2 own von der Meßgeber 2 mit dem Meßgeber 2sky.
  • the transmitter and also the measuring cell 9 with the encoder 2 are located in a housing 11 which may be formed in the manner as in the DE 198 12 296 A1 is described. This housing is a perfect dissipation of high-frequency interference without affecting the sealing effect of seals 16, which serve to seal the housing achieved.
  • the adapter 10 is, as in the DE 198 12 296 A1 described, tightly inserted into the housing. By plug or screw, the adapter 10 can be firmly connected to a component against which the displacement of another component by means of the sensing device 1 is to be detected. In this case, evenly distributed on a circumference connecting means, which ensure a derivative of high-frequency electrical currents from the housing 11 to the adapter 10 may be provided, as shown in the DE 198 12 296 A1 is described.
  • various functions such as switching functions, can be effected by the sensor signals generated thereby according to their evaluations.

Landscapes

  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zur Wegmessung nach dem Oberbegriff des Patentanspruches 1.The invention relates to a device for measuring the distance according to the preamble of claim 1.

[Stand der Technik][State of the art]

Eine derartige aus der EP-A-0 440 011 bekannte Vorrichtung dient als Kraft-, insbesondere Druckmesseinrichtung und besitzt eine fest mit einem Kolben verbundene Tasteinrichtung, auf welche die zu messende Kraft einwirkt. Die hieraus resultierende Kolbenbewegung wird über ein elastomeres Material, in welches der Kolben in einem topfförmigen Gehäuse eingebettet ist, auf den verformbaren Boden des topfförmigen Gehäuses übertragen. Am verformbaren Boden befindet sich ein Sensor, welcher ein der Verformung proportionales elektrisches Signal liefert. Der verformbare Boden bildet eine mit dem Sensor zusammenwirkende Fläche, die sich quer zur Richtung der von der Übertragungseinrichtung übertragenen Verschiebung erstreckt. Ferner kann der Boden als Membran ausgebildet sein und der Sensor von einem oder mehreren Dehnungsmessstreifen gebildet werden.Such from the EP-A-0 440 011 known device serves as a force, in particular pressure measuring device and has a permanently connected to a piston sensing device, which acts on the force to be measured. The resulting piston movement is transmitted via an elastomeric material, in which the piston is embedded in a cup-shaped housing, on the deformable bottom of the cup-shaped housing. At the deformable bottom is a sensor which provides an electrical signal proportional to the deformation. The deformable bottom forms a sensor cooperating surface which extends transversely to the direction of translation transmitted by the transmission. Furthermore, the bottom can be formed as a membrane and the sensor can be formed by one or more strain gauges.

Aus der FR-A-2,558,256 ist eine Druckmesseinrichtung bekannt, bei welcher der zu messende Druck auf eine Kolbenfläche wirkt und der Kolben gegen die Vorspannkraft einer Feder proportional zum zu messenden Druck verschoben wird.From the FR-A-2,558,256 a pressure measuring device is known in which the pressure to be measured acts on a piston surface and the piston is displaced against the biasing force of a spring proportional to the pressure to be measured.

Aus der DE-C-198 12 296 ist es bekannt, einen Drucksensor und die dazugehöriges Abtasteinrichtung in einem Adapter anzuordnen.From the DE-C-198 12 296 It is known to arrange a pressure sensor and the associated scanning device in an adapter.

[Aufgabe der Erfindung]OBJECT OF THE INVENTION

Aufgabe der Erfindung ist es, eine Vorrichtung der eingangs genannten Art zu schaffen, mit welcher eine von der Tasteinrichtung berührend erfasste lineare Verschiebung mit einfachen Mitteln auf das den Sensor aufweisende verformbare Teil übertragen wird.The object of the invention is to provide a device of the type mentioned, with which a touched by the sensing device linear displacement with simple Means is transmitted to the sensor having deformable part.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruches 1 gelöst.This object is achieved by the characterizing features of claim 1.

Eine Schraubendruckfeder der Übertragungseinrichtung und die Tasteinrichtung haben eine gemeinsame lineare bzw. axiale Führung, wobei diese Führung stabförmig ausgebildet ist und sich im Innern der Schraubendruckfeder und eines hülsenförmigen Teils der Tasteinrichtung erstreckt. Das verformbare Teil kann eine mit dem Sensor zusammenwirkende verformbare Fläche besitzen, die sich quer zur Richtung der von der Übertragungseinrichtung zu übertragenden Verschiebung ausdehnt. Das verformbare Teil kann dabei den Boden einer Meßzelle bilden, in die die Obertragungseinrichtung eingesetzt ist. Die Übertragungseinrichtung kann hierzu einen Übertragungsfuß aufweisen, welcher im wesentlichen den gesamten Boden der becherförmigen Meßzelle bedeckt und an seiner dem verformbaren Teil zugewandten Fläche konvex gekrümmt ist. Die Abtasteinrichtung ist in bevorzugter Weise in einem Adapter verschiebbar geführt. Der Adapter kann durch eine Steck- oder Schraubverbindung oder andere geeignete Verbindung mit einem Bauteil verbunden werden, gegenüber welchem eine Verschiebbewegung eines anderen Bauteils zu messen ist. Dabei kommt die Tasteinrichtung mit dem Bauteil in Berührung, dessen Verschiebung erfaßt bzw. gemessen werden soll. Es kann sich hierbei beispielsweise um ein Getriebeteil eines Kraftfahrzeugs handeln. Aus der linearen bzw. axialen Führung der Tasteinrichtung resultierende Reibungskräfte wirken sich nicht auf die Meßgröße aus. Beispielsweise durch Selbstkalibrierung können die Reibungskäfte kompensiert werden.A helical compression spring of the transmission device and the sensing device have a common linear or axial guide, said guide being rod-shaped and extending in the interior of the helical compression spring and a sleeve-shaped part of the sensing device. The deformable member may have a deformable surface cooperating with the sensor which extends transversely to the direction of the transmission means stretching shift. The deformable part can form the bottom of a measuring cell, in which the Obertragungseinrichtung is used. For this purpose, the transfer device can have a transfer foot, which covers substantially the entire bottom of the cup-shaped measuring cell and is convexly curved on its surface facing the deformable part. The scanning device is guided in a preferred manner in an adapter displaceable. The adapter can be connected by a plug or screw connection or other suitable connection with a component, against which a displacement movement of another component is to be measured. In this case, the sensing device comes into contact with the component whose displacement is to be detected or measured. This may be, for example, a transmission part of a motor vehicle. Frictional forces resulting from the linear or axial guidance of the sensing device do not affect the measured variable. For example, by self-calibration, the Reibungskäfte can be compensated.

Der Adapter ist in geeigneter Weise mit einem Gehäuse verbunden, in welchem die elektronische Auswerteeinrichtung angeordnet ist, die zur Auswertung der Sensorsignale dient. Dieses Gehäuse bildet gleichzeitig einen Schutz gegen hochfrequente Störungen und ist in bevorzugter Weise so ausgebildet, wie es in der DE 198 12 296 A1 beschrieben ist. Hierdurch kann beim Einsatz in ein Getriebe ein Getriebeschalter gebildet werden.The adapter is suitably connected to a housing, in which the electronic evaluation device is arranged, which serves for the evaluation of the sensor signals. This housing forms at the same time a protection against high-frequency interference and is preferably designed as it is in the DE 198 12 296 A1 is described. As a result, when used in a transmission, a transmission switch can be formed.

[Beispiele][Examples]

Anhand der Figur wird an einem Ausführungsbeispiel die Erfindung noch näher erläutert.With reference to the figure, the invention will be explained in more detail on an embodiment.

Die Vorrichtung besitzt eine Tasteinrichtung 1, welche in einem Adapter 10 in axialer Richtung verschiebbar geführt ist. Die Tasteinrichtung 1 besitzt ein hülsenförmiges bzw. zylindrisches Teil, welches sich in axialer Richtung im Adapter 10 erstreckt und ferner einen Tastkopf mit einer Tastfläche 13, die an ein zu überwachendes Bauteil zur abtastenden Anlage gebracht wird. Die Mantelfläche des zylindrischen Teils der Tasteinrichtung 1 kann hierzu an einer entsprechenden Führungsfläche des Adapters 10 anliegen, wie es aus der Figur erkennbar ist. Zum Schutz gegen Verschmutzung kann eine Manschette 8 vorgesehen sein, welche zwischen dem Tastkopf und dem Adapter 10 vorgesehen ist.The device has a sensing device 1, which is guided in an adapter 10 in the axial direction displaceable. The sensing device 1 has a sleeve-shaped or cylindrical part, which extends in the axial direction in the adapter 10 and also a probe with a touch surface 13, which is brought to a component to be monitored for scanning system. The lateral surface of the cylindrical part of the sensing device 1 can for this purpose abut against a corresponding guide surface of the adapter 10, as can be seen from the figure. To protect against contamination, a sleeve 8 may be provided, which is provided between the probe and the adapter 10.

Ferner erstreckt sich im Innern der Tasteinrichtung 1 eine stabförmige Führung 5. Um diese stabförmige Führung 5 ist eine Schraubendruckfeder 6 gewickelt. Die Schraubendruckfeder 6 stützt sich an ihrem einen Ende an einem Bund 14 der Tasteinrichtung 1 ab. An ihrem anderen Ende stützt sich die Schraubendruckfeder 6 an einem Übertragungsfuß 7 ab. Der Übertragungsfuß 7 und die stabförmige Führung 5 sind fest oder mit Formschluß miteinander verbunden. Durch die Feder wird eine Vorspannung erzeugt, mit welcher die Tasteinrichtung in axialer Richtung vorgespannt wird. Für den Bund 14 kann beispielsweise ein Anschlag 17 an der Innenwand der Meßzelle 9 vorgesehen sein. Hierdurch wird eine Axialverschiebung bis auf Blockstellung der Schraubendruckfeder 6 und damit eine mögliche Zerstörung oder überproportionale Verformung eines noch zu erläuternden verformbaren Teils 4 verhindert.Furthermore, extends inside the sensing device 1, a rod-shaped guide 5. To this rod-shaped guide 5, a helical compression spring 6 is wound. The helical compression spring 6 is supported at its one end on a collar 14 of the sensing device 1 from. At its other end, the helical compression spring 6 is supported on a transmission foot 7. The transfer foot 7 and the rod-shaped guide 5 are connected to each other firmly or with positive engagement. By the spring, a bias voltage is generated, with which the sensing device is biased in the axial direction. For example, a stop 17 may be provided on the inner wall of the measuring cell 9 for the collar 14. As a result, an axial displacement is prevented up to block position of the helical compression spring 6 and thus a possible destruction or disproportionate deformation of a deformable part 4 still to be explained.

Die Schraubendruckfeder 6 und der Übertragungsfuß 7 bilden eine Übertragungseinrichtung 3, mit welcher die axiale Verschiebung der Tasteinrichtung 1 auf einen Meßgeber 2 übertragen wird. Der Meßgeber 2 besitzt das verformbare Teil 4, beispielsweise in Form einer Scheibe oder Membran. Auf der vom Stützfuß 7 abgekehrten Fläche des verformbaren Teils 4 befindet sich ein Sensor, z.B. in Form von einem oder mehreren Widerstandselementen aus Halbleitermaterial, beispielsweise Dehnungsmeßstreifen, die zu einer Meßbrücke verschaltet sein können. Der Sensor kann auch kapazitiv mit dem verformbaren Teil 4 zusammenwirken. Bei einer axialen Verschiebung der Tasteinrichtung 1 wird diese über die Druckfeder 6 und den Übertragungsfuß 7 auf das verformbare Teil 4 übertragen. Die Verformung wird vom Sensor des Meßgebers 2 erfaßt und ein der Verformung proportionales Signal geliefert. Die Verformung entspricht der axialen Verschiebung der Tasteinrichtung 1. Für die Übertragungseinrichtung 3 kann auch ein nichtkompressibles Medium, beispielsweise eine Hydraulikflüssigkeit verwendet werden, welche die Axialverschiebung der Tasteinrichtung 1 weiterleitet und dabei das verformbare Teil 4 verformt. Bei der axialen Verschiebung sich ergebende Reibungskräfte können z. B. durch Selbstkalibrierung mit Hilfe einer Auswerteelektronik 12 kompensiert werden. Die Reibungskräfte haben dann keinen Einfluß auf das Meßsignal.The helical compression spring 6 and the transmission foot 7 form a transmission device 3, with which the axial displacement of the sensing device 1 is transmitted to a sensor 2. The measuring transducer 2 has the deformable part 4, for example in the form of a disk or membrane. On the side facing away from the support foot 7 surface of the deformable part 4 is a sensor, for example in the form of one or more resistance elements of semiconductor material, such as strain gauges, which connects to a measuring bridge could be. The sensor can also interact capacitively with the deformable part 4. With an axial displacement of the sensing device 1, this is transmitted to the deformable part 4 via the compression spring 6 and the transfer foot 7. The deformation is detected by the sensor of the encoder 2 and delivered a signal proportional to the deformation. The deformation corresponds to the axial displacement of the sensing device 1. For the transmission device 3, a non-compressible medium, such as a hydraulic fluid can be used, which forwards the axial displacement of the sensing device 1 and deforms the deformable part 4. In the axial displacement resulting friction forces can, for. B. be compensated by self-calibration using a transmitter 12. The frictional forces then have no influence on the measuring signal.

Das verformbare Teil 4 kann die Bodenfläche einer becherförmigen Meßzelle 9 bilden. Die Meßzelle 9 besitzt eine kreiszylindrische Ausnehmung, in welche der Übertragungsfuß 7 eingesetzt ist. Der Außendurchmesser des Übertragungsfußes 7 kann dabei etwa dem Innendurchmesser der Ausnehmung in der Meßzelle 9 entsprechen. Das verformbare Teil 4 und die Seitenwandung der Meßzelle 9 können aus einem Stück hergestellt sein. In bevorzugter Weise besteht das verformbare Teil 4 und die Meßzelle 9 aus einem Keramikmaterial.The deformable part 4 may form the bottom surface of a cup-shaped measuring cell 9. The measuring cell 9 has a circular cylindrical recess into which the transmission foot 7 is inserted. The outer diameter of the transmission foot 7 can correspond approximately to the inner diameter of the recess in the measuring cell 9. The deformable part 4 and the side wall of the measuring cell 9 can be made in one piece. Preferably, the deformable part 4 and the measuring cell 9 is made of a ceramic material.

Die vom Meßgeber 2 abgegebenen Sensorsignale werden von der Auswerteelektronik 12 ausgewertet und können über eine elektrische Steckverbindung 15 weitergeleitet werden. Die Auswerteelektronik und auch die Meßzelle 9 mit dem Meßgeber 2 befinden sich in einem Gehäuse 11, welches in der Weise ausgebildet sein kann, wie es in der DE 198 12 296 A1 beschrieben ist. Durch dieses Gehäuse wird eine einwandfreie Ableitung hochfrequenter Störungen ohne Beeinträchtigung der Dichtwirkung von Dichtungen 16, welche zur Abdichtung des Gehäuses dienen, erreicht.The output from the encoder 2 sensor signals are evaluated by the transmitter 12 and can be forwarded via an electrical connector 15. Der Sensor 2 wird von der Meßgeber 2 mit dem Meßgeber 2 verbunden. The transmitter and also the measuring cell 9 with the encoder 2 are located in a housing 11 which may be formed in the manner as in the DE 198 12 296 A1 is described. This housing is a perfect dissipation of high-frequency interference without affecting the sealing effect of seals 16, which serve to seal the housing achieved.

An dem der elektrischen Steckverbindung 15 entgegengesetzten Ende des Gehäuses 11 befindet sich der Adapter 10. Der Adapter 10 ist, wie in der DE 198 12 296 A1 beschrieben, dicht in das Gehäuse eingesetzt. Durch Steck- oder Schraubverbindung kann der Adapter 10 fest mit einem Bauteil verbunden werden, gegenüber welchem die Verschiebung eines anderen Bauteils mittels der Tasteinrichtung 1 erfaßt werden soll. Hierbei können gleichmäßig auf einem Umfang verteilte Verbindungsmittel, welche eine Ableitung hochfrequenter elektrischer Ströme vom Gehäuse 11 zum Adapter 10 gewährleisten, vorgesehen sein, wie es in der DE 198 12 296 A1 beschrieben ist. In Abhängigkeit von der Verschiebung der Tasteinrichtung 1 können durch die dabei erzeugten Sensorsignale nach deren Auswertungen verschiedene Funktionen, z.B. Schaltfunktionen, bewirkt werden.At the electrical connector 15 opposite end of the housing 11 is the adapter 10. The adapter 10 is, as in the DE 198 12 296 A1 described, tightly inserted into the housing. By plug or screw, the adapter 10 can be firmly connected to a component against which the displacement of another component by means of the sensing device 1 is to be detected. In this case, evenly distributed on a circumference connecting means, which ensure a derivative of high-frequency electrical currents from the housing 11 to the adapter 10 may be provided, as shown in the DE 198 12 296 A1 is described. Depending on the displacement of the sensing device 1, various functions, such as switching functions, can be effected by the sensor signals generated thereby according to their evaluations.

[Bezugszeichenliste][REFERENCE LIST]

11
Tasteinrichtungsensing device
22
MeßgeberThe transducer
33
Übertragungseinrichtungtransmission equipment
44
verformbares Teildeformable part
55
Führungguide
66
Druckfedercompression spring
77
Übertragungsfußtransmission foot
88th
Manschettecuff
99
Meßzellemeasuring cell
1010
Adapteradapter
1111
Gehäusecasing
1212
Auswerteelektronikevaluation
1313
Tastflächetouch surface
1414
BundFederation
1515
elektrische Steckverbindungelectrical plug connection
1616
Dichtungpoetry
1717
Anschlagattack

Claims (17)

  1. Device for displacement measurement with a mechanical sensing device (1), a transmission device (3) which transmits any displacement of the sensing device (1), a pickup (2) featuring a part (4) that can be deformed as a result of the displacement of the transmission device (3) and has a sensor which supplies an electric signal proportional to the deformation, characterised in that the sensing device (1) features a sleeve-type part with a sensing face (13) charged by a compression spring (6) with a mechanical preload acting in the direction opposite to the displacement to be measured, and that the sleeve-type part and the compression spring (6) have a common rod-type guide element (5) located in the interior of the compression spring (6) and the sleeve-type part.
  2. Device according to Claim 1, characterised in that the deformable part (4) has a face acting together with the sensor and extending in transverse direction relative to the direction of the displacement transmitted by the compression spring (6).
  3. Device according to one of the Claims 1 to 2, characterised in that the deformable part (4) is designed as a thin disc or diaphragm.
  4. Device according to one of the Claims 1 to 3, characterised in that the transmission device (3) has a transmission foot (7) contacting the deformable part (4) and featuring a convex face on the side facing said deformable part (4).
  5. Device according to one of the Claims 1 to 4, characterised in that the transmission device (3) has a compressible or incompressible medium transmitting the displacement of the sensing device (1) to the transmission foot (7).
  6. Device according to Claim 5, characterised in that the incompressible medium is a hydraulic fluid.
  7. Device according to Claim 5, characterised in that the compressible medium is provided in the form of the compression spring (6).
  8. Device according to one of the Claims 1 to 7, characterised in that the compression spring (6) is clamped between the transmission foot (7) and the sleeve-type part of the sensing device (1).
  9. Device according to one of the Claims 1 to 8, characterised in that the deformable part (4) forms the bottom of a measuring cell (9) in which the transmission foot (7) and the transmission device (3) are inserted.
  10. Device according to Claim 9, characterised in that the wall of the measuring cell (9) and the deformable part (4) are made of one formed part.
  11. Device according to Claim 10, characterised in that the formed part of the measuring cell (9) is made of ceramic material.
  12. Device according to one of the Claims 1 to 11, characterised in that the linear displacement of the sensing device (1) is stopped before a blocking position of the compression spring (1).
  13. Device according to Claim 12, characterised in that the linear displacement of the sensing device (1) is stopped by a stop (17).
  14. Device according to one of the Claims 1 to 13, characterised in that the sensor is formed by one or several wire strain gauges.
  15. Device according to one of the Claims 1 to 14, characterised in that the sensing device (1) is guided in an adapter (10) so that it slides.
  16. Device according to one of the Claims 1 to 15, characterised in that frictional forces resulting from the linear displacement of the sensing device (1) can be compensated for by calibration.
  17. Device according to one of the Claims 1 to 16, characterised in that it is designed as a transmission switch.
EP20000121126 1999-11-08 2000-09-28 Apparatus for detecting an amount of displacement Expired - Lifetime EP1098180B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999153617 DE19953617A1 (en) 1999-11-08 1999-11-08 Distance measuring device
DE19953617 1999-11-08

Publications (2)

Publication Number Publication Date
EP1098180A1 EP1098180A1 (en) 2001-05-09
EP1098180B1 true EP1098180B1 (en) 2007-10-03

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EP20000121126 Expired - Lifetime EP1098180B1 (en) 1999-11-08 2000-09-28 Apparatus for detecting an amount of displacement

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EP (1) EP1098180B1 (en)
DE (2) DE19953617A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007016536B4 (en) 2007-04-05 2010-01-07 Robert Seuffer Gmbh & Co. Kg Device for measuring a pressure prevailing in a pressure medium
DE102014206771B4 (en) 2014-04-08 2023-04-27 Inelta Sensorsysteme Gmbh & Co. Kg Linear probe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2558256A1 (en) * 1984-01-13 1985-07-19 Brachet Pierre Detector-warning device for a pressure failure in a liquid or in a gas.
EP0440011A3 (en) * 1990-02-02 1992-06-03 Pfister Messtechnik Gmbh Force and/or measuring device
DE19812296C1 (en) * 1998-03-20 1999-11-04 Robert Seuffer Gmbh & Co Apparatus for tapping high frequency electrical currents from a cylindrical housing

Also Published As

Publication number Publication date
DE19953617A1 (en) 2001-05-10
DE50014691D1 (en) 2007-11-15
EP1098180A1 (en) 2001-05-09

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