EP1310941A1 - Une méthode et un dispositif pour contrôler l'angle d'oscillation de pendule d'une cloche - Google Patents

Une méthode et un dispositif pour contrôler l'angle d'oscillation de pendule d'une cloche Download PDF

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Publication number
EP1310941A1
EP1310941A1 EP01204313A EP01204313A EP1310941A1 EP 1310941 A1 EP1310941 A1 EP 1310941A1 EP 01204313 A EP01204313 A EP 01204313A EP 01204313 A EP01204313 A EP 01204313A EP 1310941 A1 EP1310941 A1 EP 1310941A1
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EP
European Patent Office
Prior art keywords
motor
time
phase
bell
order
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.)
Granted
Application number
EP01204313A
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German (de)
English (en)
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EP1310941B1 (fr
Inventor
Gerrit c/o Clock-O-Matic N.V. Van Elst
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Clock-O-Matic Nv
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Clock-O-Matic Nv
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Application filed by Clock-O-Matic Nv filed Critical Clock-O-Matic Nv
Priority to AT01204313T priority Critical patent/ATE470215T1/de
Priority to EP01204313A priority patent/EP1310941B1/fr
Priority to DE60142298T priority patent/DE60142298D1/de
Publication of EP1310941A1 publication Critical patent/EP1310941A1/fr
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    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K1/00—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs
    • G10K1/28—Bells for towers or the like
    • G10K1/30—Details or accessories
    • G10K1/34—Operating mechanisms
    • G10K1/347—Operating mechanisms for an oscillating bell which is driven twice per cycle
    • G10K1/348—Operating mechanisms for an oscillating bell which is driven twice per cycle electrically operated

Definitions

  • the invention relates to a method for controlling a pendulum angle of a bell, in particular a church bell, wherein a pendulum movement of said bell is powered by a pulsewise driven electrical motor, in particular an asynchronous motor, wherein during a first phase of a repetitive control cycle a powerpulse is supplied to said motor, and wherein, during a second phase of said control cycle where no power is supplied to said motor and which follows said first phase, a DC voltage is applied on said motor in order to generate a time signal indicating an actual time period for said pendulum movement, said time signal being compared with a predetermined time period for said pendulum movement in order to determine a correction value if said actual period is different from said predetermined time period, and wherein said powerpulse is adjusted under control of said correction value.
  • the control cycle of the motor driving the bell comprises two phases, namely a first one wherein power is supplied to the motor in order to drive the bell and a second one where no power is supplied.
  • a DC voltage is applied to one coil of the three phase asynchronous motor. This causes that, in the powerfree condition wherein the motor is during this second phase, two AC voltages are generated in the other coils of the motor, which voltages are phase shifted with respect to each other. These voltages are generated due to the fact that the motor is driven in that second phase by the movement of the clock itself.
  • a drawback of the known method is that this method is only applicable to a three phase motor. Indeed, the DC voltage is applied to one coil and generates a voltage in the other coils due to the movement of the bell. So the known method is not applicable to a single phase motor. Further it is necessary to take into account several time periods in order to obtain a reliable time signal.
  • a method according to the invention is characterised in that said second phase corresponds to a direction reverse within said pendulum movement, and wherein said DC voltage is applied to said motor in order to generate an EMF within said motor, which EMF is monitored in order to determine each time within said second phase a time moment at which said EMF reaches a peak value, said time signal being determined by determining each time a time duration between said time moments of successive second phases.
  • the EMF Electrotive Force
  • the EMF Electrotive Force
  • This movement reverse will create a peak value in the generated EMF during each pendulum time period. So, by measuring the time duration between successive peaks, the time period of the pendulum movement is determined.
  • the method according to the invention is applicable to a single phase motor. Since the time signal is determined for each time period of the pendulum movement, the exact time duration can be measured, so that a fast control of the pendulum movement can be assured and a minimum deviation can be controlled.
  • a first preferred embodiment of a method according to the invention is characterised in that said EMF is monitored by measuring a current induced in said motor and by establishing when said current reaches a maximum value.
  • a current measurement is a reliable method for determining the peak value.
  • time moment is each time stored into a memory, said time duration being determined by deducing said stored time moment from an actual determined time moment. This renders the calculation of the time duration easy.
  • the invention also relates to a device for controlling a pendulum angle of a bell.
  • the device illustrated in figure 1 comprises a control circuit 14 connected to supply lines 5 feeding an electrical motor 4 with electrical power.
  • the motor is preferably an asynchronous AC induction motor since it has to reverse its rotational movement frequently.
  • the motor 4 drives a bell 1 fixed on a drive wheel 2 which is connected to the motor for example by means of a belt or a chain 3.
  • the motor drives the drive wheel 2 in two opposite rotational directions in order to impose a pendulum movement with a pendulum angle ⁇ on the bell.
  • the value of the pendulum angle ⁇ is predetermined in order to obtain a correctly defined pendulum movement leading to a clear and harmonious bell sound.
  • the motor is powered in order to maintain the bell at the correct pendulum angle.
  • the powering of the motor is controlled by a control member 7, for example formed by a microprocessor and an A/D converter.
  • the control member is connected to a control input of a first switch 6 mounted in the AC power supply line 5 and to a control input of second switch 13 which power output is connected via line 8 to the one or two of the supply lines 5, depending whether the motor is single or plural phase.
  • a DC supply source 10 for example formed by a capacitor or a battery, is connected between a power input of the second switch and via a shunt resistor 11 to another supply line 5, different from the one to which the power output of the second switch is connected.
  • the inputs of an isolation amplifier 12 are connected over the shunt resistor 11 and an output of the amplifier 12 is connected to a signal input of the control member 7.
  • the pendulum movement of the bell is powered by the pulsewise driven electrical motor 4.
  • a first phase F1 as illustrated in figure 2, of a repetitive control cycle governed by the control member 7, the latter generates a first control signal CS 1 which is supplied to the first switch 6, causing the latter to close. In such a manner a powerpulse is supplied to the motor 4 causing the latter to drive the bell 1.
  • the first control signal goes down, causing the first switch 6 to open and thus to interrupt the power supply to the motor.
  • the pendulum movement of the bell will not be powered and the bell will run free.
  • the first and second phase are adjusted in such a manner with respect to the bell movement that the second phase corresponds each time with the period during which the pendulum movement has reached its maximum amplitude and reverses.
  • the control member also generates a second control pulse CS 2, as illustrated in figure 2. That second control pulse is applied to the second switch 13 causing the latter to close.
  • the DC voltage of for example 8 V, supplied by the DC supply source 10 is thus supplied to the motor during that second phase.
  • the DC voltage is applied to one or two coils of the motor, depending whether the latter is a single phase or not. This explains why the second switches 13 are connected in parallel with respect to the DC supply source 10. By applying this DC voltage to the motor an EMF (Electromotive Force) is generated with the motor.
  • EMF Electrotive Force
  • This EMF generates a DC current of for example 100mA, depending on the motor power which will flow in the motor coils, causing a slight speed reduction of the bell movement which runs free since the motor is not powered during the second phase.
  • the EMF or DC current induced in the motor during that second phase is monitored by the control member 7 using therefor the signal supplied at its signal input by amplifier 12.
  • the monitored DC current is illustrated in figure 3.
  • the time moment (T1, T2) at which the peak value is reached is each time determined.
  • the second signal goes down thereby opening the switch 13. This causes the DC-voltage to be no longer applied to the motor and the EMF no longer generated as illustrated in figure 3.
  • the second phase is followed by a new first phase and the control cycle is repeated. Since during each second phase an EMF is generated in the motor, during each second phase a peak value will be observed in the EMF.
  • the values of T1 and T2 are each time stored in a memory of the control member 7. Once T2 is determined, the value of T1 is read from the memory and ⁇ t is determined by deduction T2 - T1. The read value is each time overwritten by the newly determined value in order to efficiently use the memory space available.
  • the value of ⁇ t enables now to determine a time signal indicating the actual time period of the pendulum movement.
  • ⁇ t Ist-value
  • ⁇ T Soll-value
  • the correction value is different from zero and the value of the powerpulse is adjusted in order to have the bell balancing according to the correct pendulum angle.
  • the adjustment of the powerpulse is for example realised by means of a PI regulator which is controlled by the value ⁇ T - ⁇ t.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Control Of Direct Current Motors (AREA)
  • Control Of Electric Motors In General (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP01204313A 2001-11-09 2001-11-09 Une méthode et un dispositif pour contrôler l'angle d'oscillation de pendule d'une cloche Expired - Lifetime EP1310941B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT01204313T ATE470215T1 (de) 2001-11-09 2001-11-09 Eine methode und ein gerät zur kontrolle des pendelwinkels einer glocke
EP01204313A EP1310941B1 (fr) 2001-11-09 2001-11-09 Une méthode et un dispositif pour contrôler l'angle d'oscillation de pendule d'une cloche
DE60142298T DE60142298D1 (de) 2001-11-09 2001-11-09 Eine Methode und ein Gerät zur Kontrolle des Pendelwinkels einer Glocke

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01204313A EP1310941B1 (fr) 2001-11-09 2001-11-09 Une méthode et un dispositif pour contrôler l'angle d'oscillation de pendule d'une cloche

Publications (2)

Publication Number Publication Date
EP1310941A1 true EP1310941A1 (fr) 2003-05-14
EP1310941B1 EP1310941B1 (fr) 2010-06-02

Family

ID=8181217

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01204313A Expired - Lifetime EP1310941B1 (fr) 2001-11-09 2001-11-09 Une méthode et un dispositif pour contrôler l'angle d'oscillation de pendule d'une cloche

Country Status (3)

Country Link
EP (1) EP1310941B1 (fr)
AT (1) ATE470215T1 (fr)
DE (1) DE60142298D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2551844A1 (fr) * 2011-07-28 2013-01-30 Muff Kirchturmtechnik AG Procédé de réglage d'un angle de déviation d'une cloche et dispositif d'entraînement pour le fonctionnement réglé d'une cloche couplée au dispositif d'entraînement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0120436A2 (fr) * 1983-03-23 1984-10-03 Paul Salomon Procédé et dispositif de commande d'un moteur d'entraînement pour une machine à sonner des cloches
EP0486453A1 (fr) * 1990-11-12 1992-05-20 N.V. Clock O Matic Procédé et dispositif pour faire sonner une cloche
US5327053A (en) * 1992-08-12 1994-07-05 Seagate Technology, Inc. Apparatus and method for detecting rotor position in a sensorless and brushless DC motor
EP1094443A1 (fr) * 1999-10-20 2001-04-25 Joh. Muff AG Méthode de contrôle de l'angle d'oscillation d'une cloche d'église

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0120436A2 (fr) * 1983-03-23 1984-10-03 Paul Salomon Procédé et dispositif de commande d'un moteur d'entraînement pour une machine à sonner des cloches
EP0486453A1 (fr) * 1990-11-12 1992-05-20 N.V. Clock O Matic Procédé et dispositif pour faire sonner une cloche
US5327053A (en) * 1992-08-12 1994-07-05 Seagate Technology, Inc. Apparatus and method for detecting rotor position in a sensorless and brushless DC motor
EP1094443A1 (fr) * 1999-10-20 2001-04-25 Joh. Muff AG Méthode de contrôle de l'angle d'oscillation d'une cloche d'église

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2551844A1 (fr) * 2011-07-28 2013-01-30 Muff Kirchturmtechnik AG Procédé de réglage d'un angle de déviation d'une cloche et dispositif d'entraînement pour le fonctionnement réglé d'une cloche couplée au dispositif d'entraînement

Also Published As

Publication number Publication date
ATE470215T1 (de) 2010-06-15
DE60142298D1 (de) 2010-07-15
EP1310941B1 (fr) 2010-06-02

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