EP2158452A1 - Dispositif de diagnostic pour contrôler le mouvement d'un actionneur - Google Patents

Dispositif de diagnostic pour contrôler le mouvement d'un actionneur

Info

Publication number
EP2158452A1
EP2158452A1 EP07801615A EP07801615A EP2158452A1 EP 2158452 A1 EP2158452 A1 EP 2158452A1 EP 07801615 A EP07801615 A EP 07801615A EP 07801615 A EP07801615 A EP 07801615A EP 2158452 A1 EP2158452 A1 EP 2158452A1
Authority
EP
European Patent Office
Prior art keywords
diagnostic device
sensors
diagnostic
movement path
sensor
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Withdrawn
Application number
EP07801615A
Other languages
German (de)
English (en)
Inventor
Christoph Hanisch
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.)
Festo SE and Co KG
Original Assignee
Festo SE and Co KG
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 Festo SE and Co KG filed Critical Festo SE and Co KG
Publication of EP2158452A1 publication Critical patent/EP2158452A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
    • 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
    • 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
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F15B19/005—Fault detection or monitoring

Definitions

  • the invention relates to a diagnostic device for monitoring the movement of an actuator member by two magnetic field-sensitive sensors.
  • DE 4432827 C2 likewise discloses two magnetic-field-sensitive sensors along the path of movement of a body provided with a permanent magnet, these two sensors however being arranged transversely to the movement path and serving for detecting different position states and positions of the movable body.
  • An object of the present invention is to provide a simple and inexpensive diagnostic device for a movable actuator member, are recognizable by the changes in the movement over longer periods of time. This object is achieved by a diagnostic device with the features of claim 1.
  • the diagnostic device measures the time interval which the actuator member requires to pass the two sensors and compares it with a stored setpoint value. As a result, changes in the movement can be easily detected and changes over the lifetime of the monitored process. When renewing process components, a simple adjustment is achieved by adjusting until the stored setpoint time is reached again.
  • the positioning of the fixedly spaced sensors along the trajectory is straightforward, since it only depends on the fixed distance between the sensors, but not on the absolute position along the trajectory.
  • the time recording means, the memory device, the comparison means and the reporting device are expediently combined in whole or in part together with the sensors in a sensor module or form such.
  • the sensor module expediently has a microcontroller in which the corresponding functions are realized.
  • the sensor module is connected to an external evaluation and diagnostic device via lines or preferably wirelessly.
  • the sensor module has a corresponding wire loose transmitting device and the evaluation and diagnostic device according to a receiving device.
  • the time acquisition means, the memory device, the comparison means and the reporting device may also be arranged in whole or in part in the external evaluation and diagnostic device. Depending on which and how many of these components are arranged in the sensor module or in the evaluation and diagnostic device, the transmission of the resulting signals via lines or wireless takes place.
  • a learning device (teach
  • At least one of the sensors as a position detection sensor so that it can also perform the function of position detection in addition to the diagnostic function, for example one or both end position positions.
  • the signaling device is expediently designed as an optical signaling device, in particular as a light or display, and / or as an acoustic signaling device.
  • the diagnostic device is particularly suitable for monitoring an actuator element designed as a piston displaceable in a fluidic cylinder.
  • FIG. 1 shows a schematic illustration of a sensor module having two magnetic-field-sensitive sensors on a fluidic cylinder which communicates wirelessly with a measurement and diagnostic device
  • Figure 2 is a block diagram for explaining the diagnosis.
  • a fluidic piston-cylinder arrangement 10 is shown schematically.
  • a displaceable in a fluidic cylinder 11 piston 12 moves along a linear movement path 13.
  • a sensor module 14 is mounted, the two in the direction of movement 13 from each other
  • magnetic field-sensitive sensors 20, 21 contains. These may be, for example, Hall sensors, MR sensors or coils. When passing through a permanent magnet 22 arranged on or in the piston 12, a corresponding sensor is provided in the sensors 20, 21.
  • the sensor signals are fed to a transmitting device 23 in the sensor module 19 and wirelessly to an external evaluation and Diagnostic device 24 transmitted, which has a corresponding receiving device 25.
  • the signals of the two sensors 20, 21 are supplied to a time detection device 26, in which the difference time t between the occurrence of the two sensor signals is determined. This corresponds to the transit time of the actuator member from one sensor 20 to the other sensor 21.
  • a target run time is stored in an electronic memory device 27.
  • This setpoint time is compared in a comparison device 28 with the currently measured transit time. If a predetermined deviation between the setpoint runtime and the current runtime is exceeded, then a downstream threshold stage 29 generates a corresponding message signal.
  • the predetermined deviation can also be designed to be adjustable, whereby the threshold value stage 29 can also be integrated in the comparison device 28.
  • the message of exceeding the maximum permissible deviation takes place according to the exemplary embodiment by an optical signaling device 30, which may be, for example, a luminaire, such as a light-emitting diode or a display. Alternatively or additionally, an acoustic signaling device may also be provided. Furthermore, the message signal can be supplied via a line 31 or wirelessly to an external center or monitoring device, which monitors, for example, other components.
  • an optical signaling device 30 may be, for example, a luminaire, such as a light-emitting diode or a display.
  • an acoustic signaling device may also be provided.
  • the message signal can be supplied via a line 31 or wirelessly to an external center or monitoring device, which monitors, for example, other components.
  • a learning or teaching device can for example be integrated in the time recording device 26 or be provided as a separate module. It serves to measure NEN runtime values to form the target runtime for storage in the storage device 27. For this purpose, for example, one of the first runtime signals is stored or an average value is formed over a multiplicity of measured transit time signals.
  • the checking of the transit time can be measured in each cycle during a direction of movement or during both directions of movement of the piston 12. A check in larger time or number cycle intervals is also possible. If a deviation is detected, this indicates a malfunction of the movement sequence, a defective component or age effects that can be detected by it.
  • the functions, components and assemblies explained in FIG. 2 may be contained either in the sensor module 14 or in the evaluation and diagnostic device 24 or distributed in both.
  • the signals transmitted via a line or wirelessly can therefore be correspondingly either sensor signals, runtime signals, comparison signals or message signals.
  • the respective components contained in the sensor module 14 and in the evaluation and diagnostic device 24 may be functionally integrated in a microcontroller, depending on the extent.
  • Information about the respective speed of the piston 12 can also be determined or calculated in a simple manner from the detected sensor signals or transit time signals. From this, information about the speed of the piston 12 overall can be obtained, in particular if another corresponding sensor module 32 or even further sensor modules are arranged along the movement path 13 in order to detect transit times or speeds at different points. At least one of the sensors 20, 21 of the sensor module 14 and / or at least one sensor of the sensor module 32 can additionally be used as position sensors for detecting piston positions, in particular end position positions. The corresponding additional position signals can also be fed to the evaluation and diagnostic device 24 or a corresponding control device by wire or wireless.
  • the runtime monitoring described can also be used for adjustment when renewing process components or after repairs.
  • the device only needs to be adjusted until the stored target runtime is available again.
  • the invention is of course not limited to the use of piston-cylinder assemblies, but can be used wherever an actuator member moves along a trajectory, for example in other linear drives or circular drives, valve members, lifting members or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

L'invention concerne un dispositif de diagnostic pour contrôler le mouvement d'un actionneur déplaçable le long d'une trajectoire de déplacement (13) et muni d'aimants permanents (22). Au moins deux actionneurs (20, 21) sensibles aux champs magnétiques sont disposés à distance fixe l'un par rapport à l'autre le long de la trajectoire de déplacement (13). Des moyens de calcul de l'heure (26) servent à détecter la durée de fonctionnement de l'actionneur d'un capteur (20) à l'autre (21). Des moyens de comparaison (28) comparent la durée actuellement mesurée à une durée de consigne enregistrée dans un dispositif de mémoire (27). Un dispositif de communication (30) sert à communiquer le dépassement d'un écart prédéfini ou prédéfinissable de la durée actuelle par rapport à la durée de consigne. De ce fait, il est possible de contrôler de manière simple des déroulements de processus en termes de modifications et de défauts possibles.
EP07801615A 2007-08-11 2007-08-11 Dispositif de diagnostic pour contrôler le mouvement d'un actionneur Withdrawn EP2158452A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/007120 WO2009021531A1 (fr) 2007-08-11 2007-08-11 Dispositif de diagnostic pour contrôler le mouvement d'un actionneur

Publications (1)

Publication Number Publication Date
EP2158452A1 true EP2158452A1 (fr) 2010-03-03

Family

ID=39495568

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07801615A Withdrawn EP2158452A1 (fr) 2007-08-11 2007-08-11 Dispositif de diagnostic pour contrôler le mouvement d'un actionneur

Country Status (2)

Country Link
EP (1) EP2158452A1 (fr)
WO (1) WO2009021531A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009045090B4 (de) * 2009-09-29 2018-09-27 Zf Friedrichshafen Ag Verfahren zum Betreiben einer automatisierten Kupplung
DE102014104479A1 (de) 2014-03-31 2015-10-15 Steinel Normalien Ag Gasdruckfeder
DE102015210716B4 (de) * 2015-06-11 2023-07-20 Festo Se & Co. Kg Positionssensor sowie Verfahren zum Betreiben eines Positionssensors

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19740990C2 (de) * 1997-09-18 2001-11-29 Enidine Gmbh Kolben-Zylinder-Anordnung
DE10048049A1 (de) * 2000-09-28 2002-05-02 Festo Ag & Co Fluidtechnische Einrichtung mit einer Diagnoseeinrichtung
DE102005029224A1 (de) * 2004-06-23 2006-02-09 Eldesco Corporation, Oakville Kolbengeschwindigkeitsdetektor
ATE414229T1 (de) * 2006-07-22 2008-11-15 Festo Ag & Co Kg Zylinderservicemodul

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009021531A1 *

Also Published As

Publication number Publication date
WO2009021531A1 (fr) 2009-02-19

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