DE3803268A1 - Measuring device for a working cylinder - Google Patents

Measuring device for a working cylinder

Info

Publication number
DE3803268A1
DE3803268A1 DE19883803268 DE3803268A DE3803268A1 DE 3803268 A1 DE3803268 A1 DE 3803268A1 DE 19883803268 DE19883803268 DE 19883803268 DE 3803268 A DE3803268 A DE 3803268A DE 3803268 A1 DE3803268 A1 DE 3803268A1
Authority
DE
Germany
Prior art keywords
piston
measuring device
permanent magnet
cylinder
magnet
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.)
Ceased
Application number
DE19883803268
Other languages
German (de)
Inventor
Klaus Dr Ing Denker
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE19883803268 priority Critical patent/DE3803268A1/en
Publication of DE3803268A1 publication Critical patent/DE3803268A1/en
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2892—Means for indicating the position, e.g. end of stroke characterised by the attachment means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2853—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using potentiometers

Abstract

In a pneumatic or hydraulic working cylinder (10), the cylinder tube (13) consists of a non-magnetic material and the piston (16) has a permanent magnet (17) polarised in the axial direction of the piston rod (19). A housing (26), in which a traveller (29) is movable, is arranged on the outer wall of the cylinder tube (13) in the region of the pressure space (25). The traveller (29) has a permanent magnet (30) which brings about magnetic coupling with the permanent magnet (17). As a result of this magnetic coupling, the movement of the piston (16) is transmitted synchronously to the traveller (29) which indicates the respective position of the piston on a measuring rod (32) by means of a pointer (31). The measuring device has an especially simple construction and requires no major changes on existing working cylinders. <IMAGE>

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Meßeinrichtung für einen Arbeitszy­ linder nach der Gattung des Anspruchs 1. Es ist bereits bekannt, am Außenumfang des Kolbens eines Arbeitszylinders einen Permanentmagne­ ten anzuordnen, der in Wirkverbindung mit einem induktiven Kolben­ stellungsgeber, z.B. einem Hall-Generator steht. Damit kann aber nur eine bestimmte, vorgewählte Position, z.B. eine Endposition des Kol­ bens detektiert werden.The invention relates to a measuring device for a working cycle linder according to the preamble of claim 1. It is already known on External circumference of the piston of a working cylinder is a permanent magnet to be arranged in operative connection with an inductive piston position transmitter, e.g. a Hall generator. But that can only a certain, preselected position, e.g. an end position of the col be detected.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Meßeinrichtung für einen Arbeitszylinder mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß eine einfache Wegmessung des Kolbens möglich ist. Die Position des Kolbens kann über die gesamte Verschiebelänge des Kol­ bens bestimmt werden. Die Meßeinrichtung ist leicht an der Außenwand des Zylinderrohrs anbaubar. Weder die Kolbenstange noch der Kolben müssen abgeändert werden. Insbesondere bei der Ausbildung nach An­ spruch 3 entsteht ein geringer Schlupf zwischen den beiden Perma­ nentmagneten. Dadurch ist eine besonders genaue Wegmessung ohne Nachlauf möglich. Bei einer Ausbildung der Meßeinrichtung nach An­ spruch 4 sind keine mechanischen Kopplungsglieder notwendig. The measuring device according to the invention for a working cylinder the characterizing features of claim 1 has the Advantage that simple displacement measurement of the piston is possible. The The position of the piston can be changed over the entire length of the piston be determined. The measuring device is light on the outer wall attachable to the cylinder barrel. Neither the piston rod nor the piston must be changed. Especially when training according to An saying 3 there is a small slip between the two permas magnet. As a result, a particularly precise path measurement is without Follow-up possible. When the measuring device is designed according to An According to saying 4, no mechanical coupling elements are necessary.  

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vor­ teilhafte Weiterbildungen der im Anspruch 1 angegebenen Meßeinrich­ tung möglich.The measures listed in the subclaims provide for partial refinements of the measuring device specified in claim 1 tion possible.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung darge­ stellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen die Fig. 1 einen Arbeitszylinder mit einer Meßeinrichtung, Fig. 2 einen Schnitt in Richtung II-II und Fig. 3 eine Einzelheit nach Fig. 1.An embodiment of the invention is shown in the drawing and Darge explained in more detail in the following description. 1, there is shown in FIGS. A working cylinder with a measuring device, Fig. 2 is a section in direction II-II and Fig. 3 shows a detail of FIG. 1.

Beschreibung des AusführungsbeispielsDescription of the embodiment

In der Fig. 1 ist mit 10 ein pneumatischer oder hydraulischer Ar­ beitszylinder bezeichnet, der aus einem auf beiden Seiten durch Zy­ linderköpfe 11, 12 abgeschlossenen, aus unmagnetischem Material her­ gestellten Zylinderrohr 13 besteht. Im Zylinderrohr 13 ist mit Hilfe der beiden Dichtringe 14, 15 ein Kolben 16 gleitend geführt. Am Kol­ ben 16 ist zwischen den beiden Dichtringen 14, 15 ein ringförmiger Permanentmagnet 17 angeordnet. Der Kolben 16 ist mit Hilfe einer Mutter 18 auf eine mit einem Gewinde versehenen Kolbenstange 19 auf­ geschraubt. Die Kolbenstange 19 ist in einer mittigen Bohrung 22 des Zylinderkopfs 12 geführt. Ferner sind in den Zylinderköpfen 11, 12 Einlaßbohrungen 23, 24 für die beiden Druckräume 25 des Arbeitszy­ linders 10 ausgebildet. Außerhalb des Zylinderrohres 13 ist ein Ge­ häuse 28 angebaut, in dem ein Läufer 29 gegen radiale Verdrehung ge­ sichert geführt ist. Der Läufer 29 liegt auf dem Zylinderrohr 13 auf und weist auf dieser Seite einen Permanentmagneten 30 auf, der mit dem am Kolben 16 angeordneten Permanentmagneten 17 in Wirkverbindung steht. Am Läufer 29 ist ein Zeiger 31 befestigt, der an einem Meß­ stab 32, z.B. einem Glasstab mit einer Skaleneinteilung entlang gleitet. In Fig. 1, 10 denotes a pneumatic or hydraulic Ar beits cylinder, which consists of a cylinder heads 11 , 12 closed on both sides by Zy, made of non-magnetic material forth cylinder tube 13 . A piston 16 is slidably guided in the cylinder tube 13 with the aid of the two sealing rings 14 , 15 . At Kol ben 16 , an annular permanent magnet 17 is arranged between the two sealing rings 14 , 15 . The piston 16 is screwed onto a threaded piston rod 19 by means of a nut 18 . The piston rod 19 is guided in a central bore 22 of the cylinder head 12 . Furthermore, inlet bores 23 , 24 for the two pressure chambers 25 of the cylinder 10 are formed in the cylinder heads 11 , 12 . Outside the cylinder tube 13 , a Ge housing 28 is mounted, in which a rotor 29 is guided against radial rotation secured ge. The rotor 29 rests on the cylinder tube 13 and has a permanent magnet 30 on this side, which is in operative connection with the permanent magnet 17 arranged on the piston 16 . On the rotor 29 , a pointer 31 is attached, which slides along a measuring rod 32 , for example a glass rod with a scale.

Es ist aber auch möglich, den Zeiger 31 als Schleifer eines Poten­ tiometers auszubilden und somit eine elektrische Spannung als Meß­ signal abzugreifen. Wie in Fig. 3 dargestellt, ist es besonders vorteilhaft, wenn die Polarität der Permanentmagneten 17 und 30 in Achsrichtung der Kolbenstange 19 ausgerichtet ist. Ferner sollten die Permanentmagnete 17 und 30 in entgegengesetzter Richtung pola­ risiert sein, so daß jeweils dem Nordpol des Permanentmagneten 17 der Südpol des Permanentmagneten 30 gegenübersteht. Werden Perma­ nentmagnete 17, 30 aus seltenen Erden mit einer hohen Magnetkraft benützt, und ist der Läufer weitgehend reibungsarm im Gehäuse 28 gelagert, so kann ein geringer Schlupf zwischen der Bewegung des Kolbens 16 und des Läufers 29 erreicht werden.But it is also possible to design the pointer 31 as a grinder of a potentiometer and thus tap an electrical voltage as a measurement signal. As shown in FIG. 3, it is particularly advantageous if the polarity of the permanent magnets 17 and 30 is oriented in the axial direction of the piston rod 19 . Furthermore, the permanent magnets 17 and 30 should be polarized in the opposite direction, so that in each case the north pole of the permanent magnet 17 faces the south pole of the permanent magnet 30 . If permanent magnets 17 , 30 are used from rare earths with a high magnetic force, and the rotor is largely mounted with low friction in the housing 28 , then a small slip between the movement of the piston 16 and the rotor 29 can be achieved.

Dadurch, daß der Permanentmagnet 17 im Kolben 16 des Zylinders 10 ringförmig ausgebildet ist, braucht einer Verdrehung der Kolben­ stange 19 nicht durch eine Verdrehsicherung entgegengewirkt werden. Somit entfällt zusätzlicher technischer Aufwand, der bei externen Anbau des Meßsystems an den Zylinder 10 sonst erforderlich wäre.Characterized in that the permanent magnet 17 in the piston 16 of the cylinder 10 is annular, a rotation of the piston rod 19 does not need to be counteracted by an anti-rotation device. This eliminates the additional technical effort that would otherwise be required if the measuring system were externally attached to the cylinder 10 .

Die Magnetfelder der beiden Permanentmagnete 17, 30 üben gegenein­ ander eine magnetische Kopplung aufeinander aus. Wird der Kolben 16 durch in den Druckraum 25 einströmendes Druckmittel aus seiner Aus­ gangsstellung verschoben, so bewegt sich aufgrund der magnetischen Kopplung der beiden Permanentmagnete 17, 30 der Läufer 29 synchron mit dem Kolben 16 mit. Dadurch kann die Position des Kolbens bzw. dessen Verschiebeweg am Meßstab 32 außerhalb des Zylinderrohrs 13 angezeigt und abgelesen werden.The magnetic fields of the two permanent magnets 17 , 30 exert a magnetic coupling on one another. If the piston 16 is displaced from its initial position by pressure medium flowing into the pressure chamber 25 , the rotor 29 moves synchronously with the piston 16 due to the magnetic coupling of the two permanent magnets 17 , 30 . As a result, the position of the piston or its displacement path on the measuring rod 32 outside the cylinder tube 13 can be displayed and read.

Claims (5)

1. Meßeinrichtung zur Bestimmung des Wegs oder der Position eines Arbeitszylinders (10) mit einem aus unmagnetischem Material herge­ stellten Zylinderrohrs (13) und einem einen Permanentmagneten (17) aufweisenden Kolben (16), dadurch gekennzeichnet, daß der Permanent­ magnet (17) mit einem außerhalb des Zylinderrohrs (13) geführten, zweiten Magneten (30) in Wirkverbindung steht und daß der zweite Magnet (30) mit einem Meßsystem verbunden ist.1. Measuring device for determining the path or the position of a working cylinder ( 10 ) with a cylinder tube ( 13 ) made of non-magnetic material and a piston having a permanent magnet ( 17 ) ( 16 ), characterized in that the permanent magnet ( 17 ) with a second magnet ( 30 ) guided outside the cylinder tube ( 13 ) is operatively connected and that the second magnet ( 30 ) is connected to a measuring system. 2. Meßeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der zweite Magnet (30) ein Permanentmagnet ist und daß die Polarität der beiden Permanentmagnete (17, 30) in Achsrichtung des Arbeitszylin­ ders (10) ausgerichtet und entgegengesetzt ist.2. Measuring device according to claim 1, characterized in that the second magnet ( 30 ) is a permanent magnet and that the polarity of the two permanent magnets ( 17 , 30 ) in the axial direction of the working cylinder ( 10 ) is aligned and opposite. 3. Meßeinrichtung nach Anspruch 1 und/oder 2, dadurch gekennzeich­ net, daß die Permanentmagnete (17, 30) aus seltenen Erden bestehen.3. Measuring device according to claim 1 and / or 2, characterized in that the permanent magnets ( 17 , 30 ) consist of rare earths. 4. Meßeinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekenn­ zeichnet, daß das Meßsystem (32) ein Potentiometer ist und der Zei­ ger (31) als dessen Schleifer ausgebildet ist.4. Measuring device according to one of claims 1 to 3, characterized in that the measuring system ( 32 ) is a potentiometer and the Zei ger ( 31 ) is designed as its grinder. 5. Meßeinrichtung nach einem der Ansprüche 1 bis 3, dadurch gekenn­ zeichnet, daß das Meßsystem (32) einen Glasmaßstab aufweist, an dem der Zeiger (31) entlanggleitet.5. Measuring device according to one of claims 1 to 3, characterized in that the measuring system ( 32 ) has a glass scale on which the pointer ( 31 ) slides along.
DE19883803268 1988-02-04 1988-02-04 Measuring device for a working cylinder Ceased DE3803268A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19883803268 DE3803268A1 (en) 1988-02-04 1988-02-04 Measuring device for a working cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19883803268 DE3803268A1 (en) 1988-02-04 1988-02-04 Measuring device for a working cylinder

Publications (1)

Publication Number Publication Date
DE3803268A1 true DE3803268A1 (en) 1989-04-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19883803268 Ceased DE3803268A1 (en) 1988-02-04 1988-02-04 Measuring device for a working cylinder

Country Status (1)

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DE (1) DE3803268A1 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4122481A1 (en) * 1991-07-06 1993-01-07 Kuhnke Gmbh Kg H Piston-cylinder arrangement with damped piston - uses external contactless sensor to determine piston position
DE4244304A1 (en) * 1992-12-28 1994-06-30 Asea Brown Boveri Actuating device for a hydraulic actuator with pressure-proportional control signal
US5367944A (en) * 1991-10-04 1994-11-29 Fanuc Robotics North America, Inc. Sensor for use in a fluid transfer system
EP0676550A1 (en) * 1994-03-09 1995-10-11 MANNESMANN Aktiengesellschaft Power cylinder
US5488860A (en) * 1993-12-29 1996-02-06 E-Systems, Inc. Apparatus for determining the position of a piston in a fluidic actuator
EP0984185A2 (en) * 1998-09-02 2000-03-08 FTE automotive GmbH Hydraulic actuating device for operating an automotive clutch
FR2807807A1 (en) * 2000-04-14 2001-10-19 Mannesmann Sachs Ag OPERATING DEVICE FOR AN AGENCY FRICTION CLUTCH IN THE DRIVE OF A MOTOR VEHICLE, AND DRIVE TRAIN COMPRISING SUCH A DEVICE
DE10058897A1 (en) * 2000-11-22 2002-05-23 Volkswagen Ag Method for establishing the position of the piston in a double acting cylinder has a parallel piston rod associated with position sensors
WO2003093682A1 (en) * 2002-05-04 2003-11-13 Imi Vision Limited Improvements in or relating to position control
EP1491771A1 (en) * 2003-06-27 2004-12-29 Rexroth Mecman GmbH Device for determining the actual position of an actuator
DE10329044A1 (en) * 2003-06-27 2005-01-20 Rexroth Mecman Gmbh Drive member position determining device for use with a pneumatically or hydraulically operated drive has a potentiometer film and contact electrode arranged parallel to the drive member on which a permanent magnet is mounted
DE102016226105A1 (en) * 2016-12-22 2018-06-28 Continental Teves Ag & Co. Ohg displacement sensor

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2200245A1 (en) * 1971-02-08 1972-08-24 Bunker Ramo Measuring and control device
DE7502826U (en) * 1975-01-31 1975-08-28 Festo Maschinenfabrik Stoll G
DE7635587U1 (en) * 1976-11-11 1977-03-10 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Pneumatic or hydraulic piston-cylinder unit
DE2207126B2 (en) * 1971-02-18 1977-03-17 The Marine Engineering Co. Stockport Ltd., Stockport, Cheshire (Grossbritannien) DEVICE FOR MOVING AT LEAST ONE OBJECT, IN PARTICULAR GOODS
DE2553454A1 (en) * 1975-11-28 1977-06-02 Gerhard Walter Prof Dr Seulen Permanent magnet indicator for gas or fluid flow - has two permanent magnets of opposite polarity placed close together along pipe and measuring piston
DE2917232A1 (en) * 1978-05-03 1979-11-08 Hydro Pneumatic Ab Permanent magnet indicator for piston in cylinder - has piston coated on sliding surfaces with permanent magnetic plastics material
DE3240351A1 (en) * 1982-10-30 1984-05-03 Wabco Westinghouse Steuerungstechnik GmbH & Co, 3000 Hannover PRESSURE-OPERATED WORK CYLINDER
DE3510601A1 (en) * 1985-03-23 1986-09-25 Wabco Westinghouse Steuerungstechnik GmbH & Co, 3000 Hannover Piston unit for a working cylinder, with a device for detecting the piston position

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2200245A1 (en) * 1971-02-08 1972-08-24 Bunker Ramo Measuring and control device
DE2207126B2 (en) * 1971-02-18 1977-03-17 The Marine Engineering Co. Stockport Ltd., Stockport, Cheshire (Grossbritannien) DEVICE FOR MOVING AT LEAST ONE OBJECT, IN PARTICULAR GOODS
DE7502826U (en) * 1975-01-31 1975-08-28 Festo Maschinenfabrik Stoll G
DE2553454A1 (en) * 1975-11-28 1977-06-02 Gerhard Walter Prof Dr Seulen Permanent magnet indicator for gas or fluid flow - has two permanent magnets of opposite polarity placed close together along pipe and measuring piston
DE7635587U1 (en) * 1976-11-11 1977-03-10 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Pneumatic or hydraulic piston-cylinder unit
DE2917232A1 (en) * 1978-05-03 1979-11-08 Hydro Pneumatic Ab Permanent magnet indicator for piston in cylinder - has piston coated on sliding surfaces with permanent magnetic plastics material
DE3240351A1 (en) * 1982-10-30 1984-05-03 Wabco Westinghouse Steuerungstechnik GmbH & Co, 3000 Hannover PRESSURE-OPERATED WORK CYLINDER
DE3510601A1 (en) * 1985-03-23 1986-09-25 Wabco Westinghouse Steuerungstechnik GmbH & Co, 3000 Hannover Piston unit for a working cylinder, with a device for detecting the piston position

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
In Betracht gezogene ältere Anmeldung: DE-OS 36 34 062 *
Z. fluid Jan. 1986, S. 36-38 *
Z. fluid Juli 1972, S. 30-32 *
Z. fluid Juli 1976, S. 24-27 *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4122481A1 (en) * 1991-07-06 1993-01-07 Kuhnke Gmbh Kg H Piston-cylinder arrangement with damped piston - uses external contactless sensor to determine piston position
US5367944A (en) * 1991-10-04 1994-11-29 Fanuc Robotics North America, Inc. Sensor for use in a fluid transfer system
DE4244304A1 (en) * 1992-12-28 1994-06-30 Asea Brown Boveri Actuating device for a hydraulic actuator with pressure-proportional control signal
US5488860A (en) * 1993-12-29 1996-02-06 E-Systems, Inc. Apparatus for determining the position of a piston in a fluidic actuator
EP0676550A1 (en) * 1994-03-09 1995-10-11 MANNESMANN Aktiengesellschaft Power cylinder
EP0984185A3 (en) * 1998-09-02 2001-11-14 FTE automotive GmbH Hydraulic actuating device for operating an automotive clutch
EP0984185A2 (en) * 1998-09-02 2000-03-08 FTE automotive GmbH Hydraulic actuating device for operating an automotive clutch
FR2807807A1 (en) * 2000-04-14 2001-10-19 Mannesmann Sachs Ag OPERATING DEVICE FOR AN AGENCY FRICTION CLUTCH IN THE DRIVE OF A MOTOR VEHICLE, AND DRIVE TRAIN COMPRISING SUCH A DEVICE
DE10058897A1 (en) * 2000-11-22 2002-05-23 Volkswagen Ag Method for establishing the position of the piston in a double acting cylinder has a parallel piston rod associated with position sensors
WO2003093682A1 (en) * 2002-05-04 2003-11-13 Imi Vision Limited Improvements in or relating to position control
EP1491771A1 (en) * 2003-06-27 2004-12-29 Rexroth Mecman GmbH Device for determining the actual position of an actuator
DE10329044A1 (en) * 2003-06-27 2005-01-20 Rexroth Mecman Gmbh Drive member position determining device for use with a pneumatically or hydraulically operated drive has a potentiometer film and contact electrode arranged parallel to the drive member on which a permanent magnet is mounted
DE10329044B4 (en) * 2003-06-27 2006-04-20 Rexroth Mecman Gmbh Means for determining the current position of a drive member along the stroke or angle of rotation, in particular in a fluid-operated linear or rotary drive
DE102016226105A1 (en) * 2016-12-22 2018-06-28 Continental Teves Ag & Co. Ohg displacement sensor

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