EP2000875B1 - Procédé destiné à l'étalonnage automatique d'un dispositif de réglage pour une introduction de liquide réglable - Google Patents

Procédé destiné à l'étalonnage automatique d'un dispositif de réglage pour une introduction de liquide réglable Download PDF

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Publication number
EP2000875B1
EP2000875B1 EP07109932A EP07109932A EP2000875B1 EP 2000875 B1 EP2000875 B1 EP 2000875B1 EP 07109932 A EP07109932 A EP 07109932A EP 07109932 A EP07109932 A EP 07109932A EP 2000875 B1 EP2000875 B1 EP 2000875B1
Authority
EP
European Patent Office
Prior art keywords
actuator
controller
position signal
control device
signal
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.)
Not-in-force
Application number
EP07109932A
Other languages
German (de)
English (en)
Other versions
EP2000875B8 (fr
EP2000875A1 (fr
Inventor
Martin Knostmann
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.)
Elster GmbH
Original Assignee
Elster Kromschroeder 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 Elster Kromschroeder GmbH filed Critical Elster Kromschroeder GmbH
Priority to EP07109932A priority Critical patent/EP2000875B8/fr
Priority to AT07109932T priority patent/ATE442620T1/de
Priority to DE502007001497T priority patent/DE502007001497D1/de
Publication of EP2000875A1 publication Critical patent/EP2000875A1/fr
Application granted granted Critical
Publication of EP2000875B1 publication Critical patent/EP2000875B1/fr
Publication of EP2000875B8 publication Critical patent/EP2000875B8/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F23N1/022—Regulating fuel supply conjointly with air supply using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/20—Calibrating devices

Definitions

  • the invention relates to the calibration of actuators or actuators for controllable fluid supply.
  • the invention relates to actuating devices with actuators, which adjust a mechanical throttle device in the fluid supply of a gas consumption device.
  • the fluid supply is adjusted depending on the required operating parameters and performance requirements.
  • a volume flow change of the respective fluid is made with actuators in gas or air lines and using coupled actuators or throttle devices.
  • the US 4506642 describes a positioning system from another area of technology. With an electronic accelerator, an actual range of the pedal is adjusted with a predetermined range.
  • An actuator is controlled with a setpoint signal, for example, a current signal, which is in a predetermined setpoint signal range (eg 4-20mA).
  • the actuator moves the actuator or the throttle device according to the predetermined setpoint signal.
  • the setpoint signal ranges are regularly fixed - the actuator is the correct implementation of the setpoint signal in an actual control value of the throttle device left.
  • throttle for example, regularly rotational angle of 0 ° to 90 ° can be approached to achieve the change in volume flow.
  • the setpoint specifications are to be transferred to this rotation angle range. at Delivery of a setting device this is already regularly pre-calibrated to a setting range.
  • Throttle end positions are limited to limit switches operated by shift cams mounted on the drive shaft, in accordance with generally accepted standards. This measure interrupts the power supply to the drive motor as soon as a corresponding end position is reached.
  • the switches fulfill a safety function, since a reliable start-up of the end positions must be ensured, for example during pre-rinsing of the burner.
  • an individual setting range of the actuator deviating from the delivery state is required in a fluid supply.
  • a smaller range of rotation angles may be desired for a throttle.
  • the cams which actuate the limit switches are set to the required setting range during commissioning by an installer.
  • the actuator continues to be supplied with reference value signals in the predetermined reference signal range.
  • a calibration of the actuator is required.
  • the specified ranges (setpoint signal and setting range) are related by a characteristic curve (often a characteristic curve).
  • the entire setting range can then be approached using the full width of the setpoint signal. It is desirable that the setpoint signal range is mapped to the entire range, which is limited by the limit switches.
  • the setting by means of a potentiometer is iterative, because after each change it must be checked whether the end positions were made with the potentiometer setting.
  • the drive is manually moved to the open or closed position and manually triggered a memory function in the respective positions.
  • the control system can then calculate a characteristic from the predetermined values.
  • the object of the invention is to simplify the calibration of an actuator for a variety of possible applications and to reduce the susceptibility to errors.
  • an actuator has a control device which controls a program-controlled device, e.g. having a microcontroller.
  • the actuator also has an actuator coupled to the controller.
  • a mechanical throttle device is coupled to the actuator and adjustable by this in a control range between two end positions.
  • the control device can be controlled by specifying setpoint signals in a predetermined setpoint signal range.
  • the types of signals can be arbitrary, in particular current signals or digital signals can be used.
  • the actual actuator forms part of the adjusting device and is formed from the control device with associated microcontroller and the actuator, wherein the actuator also has a drive.
  • the control device controls under control of a in the microcontroller running program the entire calibration process.
  • the controller controls the actuator to move the throttle device in a first direction.
  • repeated detection of the position of the actuator by the control device takes place.
  • a position signal of a position detection system associated with the actuator is detected by the control device in order to determine a standstill of the actuator. This standstill will be present when a limit switch limits the end of the control range and interrupts the motor current.
  • the control device detects a standstill of the actuator. The position signal is then stored as the first end position signal in the control device.
  • the actuator is actuated by the control device in order to move the throttle device in a second direction.
  • the position of the actuator is detected repeatedly by the control device, the position signal of the position detection system being detected by the control device. If the position signal changes by less than a second minimum value in a second period of time, the control device determines the standstill of the actuator and thus the reaching of the second end position and stores the position signal as a second end position signal in the control device.
  • the control device now has two end position signals as well as the known limitations of the setpoint signal range. From the final setpoint values and the final position signals, a control characteristic or a functional relationship is calculated and stored in the control device.
  • the entire predefined setpoint signal range can be used for the control and is optimally transmitted in the control device to the setting range determined during the calibration. It is not a complex user intervention for the calibration required and the process runs quickly, with little effort and with low error rate.
  • a particular advantage of the invention is that the signals of an already existing position sensor are evaluated. Additional monitoring of signals (e.g., the limit switches) to detect reaching the end positions is not required. As an essential aspect according to the invention, therefore, the temporal evaluation of the position information is used to detect the achievement of the end positions and the resulting standstill of the actuator.
  • the determination of the standstill of the actuator takes place when a minimum change in position in a time interval is not detected.
  • a further check of the standstill for example renewed detection of the change in position after elapse of a further period of time) can take place.
  • control device monitors during the movement of the throttle device in the first and the second direction exceeding an allowable maximum duration, and aborts the method and generates an error message when the allowable maximum duration is exceeded.
  • a time limit for performing the calibration is monitored. As far as e.g. If, for some reason, the adjusting movement does not come to a standstill (for example due to faulty coupling of the actuator with the actuator or faulty limit switches), the process is terminated. The termination can be displayed to a user visually or acoustically.
  • the control unit when the control unit detects at the start of the calibration process that the position signal changes by less than a predetermined third minimum value in a predetermined third time period, the initial direction of movement of the actuator is reversed.
  • the detected end position signals are preferably subjected to a plausibility check in the control device. It is checked whether the end position signals are within a predetermined range of values. A plausibility check will provide further assurance of proper installation and calibration. Faulty cam positions and limit switches can be detected in this way.
  • FIG. 1 shows a diagram showing the representation of a characteristic change by the calibration method.
  • FIG. 2a shows a flowchart of a first subsection of the calibration method according to the invention.
  • FIG. 2b shows a flowchart of a second section of the calibration method according to the invention.
  • FIG. 3 shows a schematic diagram of a control device according to the invention.
  • the actuator is used for volume flow change in an air line of a gas burner.
  • a throttle valve is used, which can limit the passage of air variable.
  • the actuator has a control device with a microcontroller. With the control device, an actuator is coupled, which has an associated drive. The controller controls the actuator which is coupled to the throttle and thus changes the angular position of the throttle in the air line.
  • the control cam mounted on the drive shaft are adjusted.
  • the switching buttons limit the adjustment range of the throttle.
  • the cams actuate when reaching an end position of a micro-switch, which defines an end position of the throttle.
  • control cams are set on the drive shaft in such a way that the adjustment range of the throttle valve is limited to rotational angles of 20 ° and 80 ° (0 ° corresponds to a throttle position transverse to the direction of flow, ie a closed position and 90 ° corresponds to one Position parallel to the flow direction, ie an open position).
  • the controller accepts set point signals in the range of 4 to 20 mA, according to a predetermined standard. This setpoint signal range should be able to be used for control over the entire setting range defined by the cam position.
  • control current or the setpoint signal is entered on the abscissa of the diagram.
  • the corresponding rotation angle is shown on the coordinate.
  • the cams mounted on the drive shaft are set in such a way that the limit switches are approached in positions 2 and 3, ie at 20 ° and 80 °. It can be seen that the setpoint range between 4 and 8 mA as well as between 18 and 20 mA has no corresponding accessible adjustment ranges of the rotation angle.
  • the characteristic curve 1 is converted into a characteristic curve 4, wherein the entire setpoint range of 4 to 20 mA covers the control range of 20 ° to 80 ° limited by the switching cams. To establish such a linear relationship, it is sufficient to define two value pairs.
  • the automated method according to the invention converts the actuator from the original or delivery state into a calibrated state, wherein the corresponding characteristic curve 4 is stored in the control device.
  • FIG. 2A a first section of an embodiment of the calibration method according to the invention is shown.
  • the control device which has a microcontroller which executes a corresponding program, controls the actuator for movement in the direction of the open position.
  • the actuator moves at 110 in the direction of the open position and thereby rotates the coupled to the actuator throttle in the direction of increasing rotation angle. This movement maintains the controller for a predetermined period of time of X seconds, with the period being regularly between 0.5 and 5 seconds.
  • the controller monitors at 120 based on the signals of a position detection, which is formed from a coupled to the drive shaft potentiometer, whether the angular position of the throttle changes. If not, proceed to step 135, which is explained below.
  • the actuator continues to move the throttle under control of the controller toward the open position.
  • a timeout is checked. If a predetermined acceptable period of time for reaching the open position is exceeded, an abort of the calibration process is initiated at 140 with the output of a corresponding error message.
  • FIG. 2B This in FIG. 2A at position A ending diagram is in FIG. 2B continued at A.
  • the controller drives the actuator at 180 to move the throttle closer Angle of rotation, ie to adjust in the direction of the closed position.
  • the maximum total time allowed is monitored and motion of the actuator is monitored.
  • the position is cached at 220 as a new minimum position.
  • the control device checks whether plausible data for the minimum and maximum position are available, in particular whether they are within a permissible setting range.
  • the minimum and maximum positions are stored in step 240 and the characteristic curve 4 is calculated.
  • the control device has the data which minimum position is to be approached with a nominal value of 4 mA, which corresponds to a position of the throttle valve of 20 °.
  • it has the information that at a setpoint of 20 mA, the maximum position is to be approached, which corresponds to an angle of rotation of 80 ° of the throttle valve.
  • the method is started when the throttle is already in the open position, it is detected at step 120 that the actuator is not moving. In this case, the method is executed in steps 135, 145, 155, 175 such that first the new minimum position which corresponds to the closed position is determined and in steps 185, 195, 205, 225 a new maximum position is determined and is stored. This ensures that proper calibration can be performed from any throttle position.
  • the calibration is carried out again after successful execution in order to check the reproducibility of the calibration data.
  • the calibration can be time-controlled or user-triggered as often as desired.
  • the actuator for external signals can be completely disabled so as not to affect the calibration.
  • User control of the calibration process is not required, but data output can be made to allow a user to verify. Based on this data, faulty cam positions can be detected automatically, for example if the cam position is outside the possible working range.
  • FIG. 4 shows a schematic circuit diagram of a setting device according to the invention.
  • the control device 300 has a microcontroller.
  • the program for carrying out the method according to the invention is stored in the memory of the microcontroller.
  • Coupled to the controller 300 is an operator interface 305 having display means and a start switch for initiating the calibration procedure.
  • a contact strip 310 coupled to the control device has terminals for the actual value and desired value signals.
  • the set point signals may be provided to the controller 300 in various predetermined set point signal ranges, e.g. as current signals in the range of 4-20 mA (other signal ranges are selectable).
  • the position detection system 315 which has a potentiometer and supplies position signals of a drive shaft to the control device 300.
  • the position detection system is disposed on the actuator 320, and converts its rotational position in the relayed position signal.
  • a contact strip 325 has various connections of the group L1.
  • the terminals L1-on and L1-to serve the operation of the actuator and the throttle device, bypassing the control device.
  • the L1 enable terminal provides the operating voltage for the operation of the actuator under the control of the controller. If a corresponding voltage is present at L1 enable, a corresponding signal is applied to the control device via line 330 (after suitable conversion).
  • the controller then actuates the switches 335 by applying a signal on line 340, thereby excluding activation of the actuator via L1-to and L1-on.
  • the controller 300 can take over the control of the actuator via the signal lines 345 and 350 and perform the calibration process.
  • the limit switches S3 and S4 interrupt when performing the method when reaching the end positions of the throttle valve, the power supply of the actuator 320 via circuit one of the switch 355.
  • the control for a continued movement in this direction is then inhibited and the end positions are defined.
  • the control device 300 detects the standstill of the actuator via the signal of the device 315 and performs the movement of the actuator in the other direction, in which case the other of the switch 355 is actuated in the opposite end position.
  • controller exclusively utilizes the location information of the device 315 to perform the calibration.
  • a connection of the switch 355 with the controller 300 does not exist.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Measurement Of Radiation (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Transplanting Machines (AREA)

Claims (10)

  1. Procédé de calibrage automatique d'un dispositif de réglage d'une alimentation en fluide réglable pour un dispositif de consommation de gaz, dans lequel le dispositif de réglage présente un actionneur, un dispositif de commande couplé à l'actionneur et un dispositif d'étranglement mécanique couplé à l'actionneur et déplaçable entre deux positions finales dans une zone de réglage, lequel dispositif de commande peut être commandé sur une plage prédéfinie de valeurs théoriques de réglage, qui se situent entre deux valeurs théoriques finales,
    comprenant les étapes consistant à :
    initier l'opération de calibrage automatique,
    le dispositif de commande réalisant de manière programmée, en réaction à l'initiation, les étapes consistant à :
    commander l'actionneur par le dispositif de commande pour déplacer le dispositif d'étranglement dans une première direction,
    enregistrer de manière répétée la position de l'actionneur par le dispositif de commande, où un signal de position d'un système d'enregistrement de position affecté à l'actionneur est enregistré par le dispositif de commande pour surveiller un mouvement ou un arrêt de l'actionneur,
    puis, lorsque le signal de position varie dans un premier intervalle de temps d'une valeur inférieure à une première valeur minimale, enregistrer le signal de position comme premier signal de position finale dans le dispositif de commande,
    commander l'actionneur par le dispositif de commande pour déplacer le dispositif d'étranglement dans une deuxième direction,
    enregistrer de manière répétée la position de l'actionneur par le dispositif de commande, le signal de position du système d'enregistrement de position étant enregistré par le dispositif de commande,
    puis, lorsque le signal de position varie dans un deuxième intervalle de temps d'une valeur inférieure à une deuxième valeur minimale, enregistrer le signal de position comme deuxième signal de position finale dans le dispositif de commande,
    calculer une ligne caractéristique de réglage à partir des valeurs théoriques finales prédéfinies et des signaux de position finale enregistrés dans le dispositif de commande et sauvegarder la ligne caractéristique.
  2. Procédé selon la revendication 1, dans lequel le dispositif de commande surveille un dépassement d'une durée maximale autorisée pendant le mouvement du dispositif d'étranglement dans la première et la deuxième directions et, lorsque la durée maximale autorisée est dépassée, le procédé est interrompu et un message d'erreur est généré.
  3. Procédé selon la revendication 1 ou 2, dans lequel, lorsque le dispositif de commande enregistre au démarrage de l'opération de calibrage le fait que, dans un troisième intervalle de temps prédéfini, le signal de position varie d'une valeur inférieure à une troisième valeur minimale prédéfinie, le dispositif de commande inverse le sens de mouvement initial de l'actionneur.
  4. Procédé selon l'une quelconque des revendications 1 à 3, dans lequel les signaux de position finale dans le dispositif de commande sont soumis à un contrôle de vraisemblance, où il est vérifié si les signaux de position finale se situent dans une plage de valeurs prédéfinie.
  5. Procédé selon l'une quelconque des revendications 1 à 4, dans lequel le dispositif de commande réalise au moins à deux reprises l'opération de calibrage et génère, dans le cas d'une divergence des résultats, un signal d'erreur à partir d'une différence prédéfinie.
  6. Procédé selon l'une quelconque des revendications 1 à 5, dans lequel le dispositif de commande délivre des rétrosignaux optiques sur la réalisation en cours, la fin réussie et une interruption du calibrage.
  7. Procédé selon l'une quelconque des revendications 1 à 6, dans lequel un signal d'un potentiomètre est exploité comme signal de position.
  8. Procédé selon l'une quelconque des revendications 1 à 6, dans lequel un signal d'un générateur d'incrément est exploité comme signal de position.
  9. Procédé selon l'une quelconque des revendications 1 à 8, dans lequel on utilise, comme dispositif d'étranglement, un clapet d'étranglement, une soupape ou un poussoir.
  10. Dispositif de réglage à autocalibrage destiné à une alimentation en fluide réglable pour un brûleur à gaz, dans lequel le dispositif de commande présente :
    un actionneur, qui présente un dispositif d'entraînement commandable, un dispositif de commande couplé à l'actionneur, qui présente un micro-contrôleur, lequel micro-contrôleur contient des moyens d'enregistrement qui enregistrent des instructions pour réaliser le procédé de calibrage selon l'une quelconque des revendications 1 à 9.
EP07109932A 2007-06-08 2007-06-08 Procédé destiné à l'étalonnage automatique d'un dispositif de réglage pour une introduction de liquide réglable Not-in-force EP2000875B8 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP07109932A EP2000875B8 (fr) 2007-06-08 2007-06-08 Procédé destiné à l'étalonnage automatique d'un dispositif de réglage pour une introduction de liquide réglable
AT07109932T ATE442620T1 (de) 2007-06-08 2007-06-08 Verfahren zum automatischen kalibrieren einer stelleinrichtung für eine regelbare fluidzuführung
DE502007001497T DE502007001497D1 (de) 2007-06-08 2007-06-08 Verfahren zum automatischen Kalibrieren einer Stelleinrichtung für eine regelbare Fluidzuführung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07109932A EP2000875B8 (fr) 2007-06-08 2007-06-08 Procédé destiné à l'étalonnage automatique d'un dispositif de réglage pour une introduction de liquide réglable

Publications (3)

Publication Number Publication Date
EP2000875A1 EP2000875A1 (fr) 2008-12-10
EP2000875B1 true EP2000875B1 (fr) 2009-09-09
EP2000875B8 EP2000875B8 (fr) 2009-10-14

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EP07109932A Not-in-force EP2000875B8 (fr) 2007-06-08 2007-06-08 Procédé destiné à l'étalonnage automatique d'un dispositif de réglage pour une introduction de liquide réglable

Country Status (3)

Country Link
EP (1) EP2000875B8 (fr)
AT (1) ATE442620T1 (fr)
DE (1) DE502007001497D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008061010A1 (de) * 2008-12-08 2010-06-10 Siemens Building Technologies Hvac Products Gmbh Verfahren zur Einstellung und Steuerung eines Stellantriebes für einen Brenner
DE102020128240A1 (de) * 2020-10-27 2022-04-28 Auma Riester Gmbh & Co. Kg Verfahren zur Inbetriebnahme eines Stellantriebs

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3149361C2 (de) 1981-12-12 1986-10-30 Vdo Adolf Schindling Ag, 6000 Frankfurt Elektrisches Gaspedal
DE3909905A1 (de) * 1989-03-25 1990-09-27 Bosch Gmbh Robert Verfahren zur bestimmung wenigstens einer endstellung einer verstelleinrichtung in einem kraftfahrzeug
US6044857A (en) * 1997-02-13 2000-04-04 Erie Manufacturing Company Electronic controller for a modulating valve
US6279870B1 (en) 1998-03-27 2001-08-28 Maxon Corporation Intelligent valve actuator

Also Published As

Publication number Publication date
EP2000875B8 (fr) 2009-10-14
EP2000875A1 (fr) 2008-12-10
ATE442620T1 (de) 2009-09-15
DE502007001497D1 (de) 2009-10-22

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