EP0967360B1 - Control device of a roller shutter driving motor - Google Patents

Abstract

The controller identifies the nature of the end-of-travel by analysis of variation of the motor (M) torque. The controller adapts the motor stop command to suit the end-of-travel identified. The controller has a computer (3) to analyze variation with time of the motor torque. The state of the door is determined from torque to allow adaptation to different stops at top and bottom of travel.

Description

The present invention relates to a device for control of a roller shutter drive motor motorized consisting of stackable blades, comprising a automation reacting to a variation in torque engine.

It is known, from a relatively large number of documents and facilities in service, measure the engine torque and to stop the engine by comparison of the measured torque with a value of reference

The device described in patent application DE-A-196 10 877 uses a torsion bar acting on two strain gauges, for example sensors piezoelectric. The device described in the request EP-A-0 822 316 uses a spring opposing the rotation of the motor housing, this rotation being detected by optical sensors or a angular displacement. In the device according to EP-A-0 703 344, the torque value thresholds are determined by two springs opposing the rotation of the motor housing, rotation that acts directly on two commanding switches motor power. On winding, the motor is stopped after the roller shutter has traveled predetermined path from the moment the couple has reached the threshold determined by the spring corresponding.

In the case of a single-phase asynchronous motor with phase shift capacitor, it is known to use a or two engine operating parameters for determine the torque threshold. We proposed for example use the voltage measured across the phase shift capacitor (DE-A-27 26 696, DE-C-31 30 035) or the starting voltage on the winding of the motor compared to the supply voltage (US-A-4 196 462) or the voltage across the auxiliary motor winding or the currents in the main winding and in the auxiliary winding.

All known devices require an adjustment which depends on the dimensions and weight of the roller shutter, how it is attached to the winding tube and conditions of its installation, in particular of the amplitude of its unfolding. About the method of fixing the roller shutter to its tube winding, this fixing can be in particular secured by a foil, strap or lock. According to the mounting and the type of fixing of the shutter rolling at its winding tube, the settings will be different. In particular, if the fixing of the flap rolling to its winding tube is ensured by a tinsel, i.e. a steel blade forming spring, the winding tube, when the blades of the roller shutter are completely stacked, will have a elastic play which will result in a variation relatively slow engine torque. However, if this fixation is ensured by a strap, the couple will temporarily remain void until rewinding of the rolling shutter in the opposite direction, whereas if the fixing is ensured by a lock, that is to say rigid, the torque will suddenly increase in the same conditions.

It is known to overcome these adjustments by making to learn by the control automation the engine torque curve after installation. In this case, if the engine is disassembled to be installed in another winding tube, a new learning procedure is required. A aging of the installation and modification of friction forces may also require a new learning in order to get a new closing or fully opening the roller shutter.

The object of the invention is to overcome procedures adjustment and learning.

The control device according to the invention is characterized in that its automation includes means of identifying the kind of limit switch rolling shutter operating by analyzing the variation of engine torque and control adaptation means stopping the engine at the kind of limit switch identified.

From the analysis of the variation of the engine torque, that is to say the curve representative of this variation, the automation is thus capable of recognize if the roller shutter is to be rolled up or, on the contrary, if the blades are being to stack up. If the shutter rolls up, the control can simply stop the engine when the variation in engine torque exceeds a certain value corresponding to the arrival in high stop of the last roller shutter blade. On the other hand, if the automation has identified that the blades are stacking there may launch a specific analysis procedure for the evolution of the driving torque in order to identify the genre connecting the roller shutter deck to its tube and stop the engine according to particular criteria adapted to each type of fixation.

To this end, the automation preferably comprises a logical processing unit (ULT) containing a program analysis of the variation of the engine torque according to which we determine if the roller shutter is in phase winding or unwinding or stacking or stacking, we save the detected state, we wait detection of a state different from the recorded state, we record this different state and determine the kind of end of race by analyzing the sequence of two registered states.

If the automation has recognized that the shutter rolling is in the stacking phase, the ULT, after having detected the cancellation of the engine torque corresponding to the end of the stacking of the slides, analysis by means of a subroutine, the evolution of the engine torque from from zero: if the torque remains zero for a predetermined time, which corresponds to a strap attachment, or if the torque evolves relatively slowly from zero, which corresponds to a fixing by foil, the automation immediately stops feeding of the motor. On the other hand, if the couple increases quickly, which means rigid attachment by lock, the automation interrupts the supply of motor when the variation of the motor torque reaches a predetermined value, as happens generally when the roller shutter arrives in stop in high position.

In the event that the ULT has identified a sequence "unstacking-winding", we detect a rapid and continuous increase in torque and control stopping the engine when the torque variation exceeds a predetermined value. The stop command could also be done deferred as described in patent EP-A-0 703 344.

la figure 1 représente le schéma d'un dispositif de commande de volet roulant,

la figure 2 représente la courbe du couple moteur en fonction du temps,

la figure 3 représente l'algorithme principal du programme de l'ULT (unité logique de traitement),

la figure 4 représente l'algorithme de mode de fixation du volet roulant, et

la figure 5 représente l'algorithme butée franche.

The invention will be explained in more detail by means of an exemplary embodiment and in relation to the appended drawing in which:

FIG. 1 represents the diagram of a rolling shutter control device,

FIG. 2 represents the curve of the engine torque as a function of time,

FIG. 3 represents the main algorithm of the ULT program (logical processing unit),

FIG. 4 represents the algorithm for fixing the roller shutter, and

FIG. 5 represents the straightforward stop algorithm.

The control device shown schematically in FIG. 1 comprises a torque detector 1, consisting for example of a micro-displacement sensor as described in patent EP-A-0 665 416, measuring the torsion of a torsion element supporting the motor M, an analog-digital converter (CAN) 2 converting the signal supplied by the sensor 1 in a digital signal introduced in a ULT 3 equipped with a microprocessor, an interface 4, principle also consisting of a converter analog-digital for entering a parameter of engine operation measured on the engine and its introduction to ULT 3. The control system further includes a manual control 5 of down up.

Figure 2 shows the shape of the torque C as a function of time t. The time t0 corresponds to the position fully rolled up. If we start from this position, we first notes that the couple suddenly drops, which corresponds to a relaxation of the rolled up blind with its last blade resting against a stop, by example a blind box, the arrival at the stop having creates a certain tension on the blind, i.e. a torque on the engine. We then observe that, in a zone A, the torque increases according to a wavy curve, this ripple being due to simultaneous variations the winding diameter and the number of blades suspended shutters. Then begins a phase stacking which results in a rapid decrease in torque corresponding to part B of the curve.

When all the blades are stacked, the torque reached a level C or the couple is canceled. From this level C, the couple can evolve in three ways different, depending on whether it is rigidly fixed by a latch, strap or tinsel. If it is fixed by a lock, the engine immediately encounters a strong resistance and the torque curve increases very quickly as represented by line D. If by against the roller shutter is fixed by straps, these straps loosen completely and torque remains void and would remain so until the roller shutter wraps in the other direction on its winding tube, which of course should be avoided. If the shutter roller is fixed by a foil, the elasticity of this makes the torque evolve relatively slowly and irregularly as represented by the part F of the curve.

Analysis of the motor torque curve is carried out according to the algorithms shown in Figures 3 to 5. Zones 1 and 0 correspond respectively to parts A and B of the curve.

1. Identification de la zone de la courbe au moyen d'un compteur indicateur de zone incrémenté si l'évolution du couple est positive et décrémenté si l'évolution du couple est négative :

si l'indicateur de zone tant à rester de façon absolue au dessous d'un certain seuil, assez faible, cela signifie que le compteur est successivement incrémenté et décrémenté et que par conséquent l'on se trouve en phase d'enroulement ou de déroulement, cette zone 1 étant alors signalée par l'activation d'un indicateur "zone 1" ;

si l'indicateur de zone tend à augmenter de façon absolue et dépasse un seuil déterminé, cela signifie que le volet roulant est en phase d'empilement ou de désempilement, la zone étant alors signalée par l'activation d'un indicateur "zone 0".

2. La zone identifiée est enregistrée dans une mémoire-du-premier-effet.

3. On détecte un changement de zone.

4. La seconde zone identifiée est enregistrée dans une mémoire-du-second-effet.

5. On examine la séquence obtenue :

si la séquence est "zone 1-zone 0", cela signifie que le volet roulant est en phase d'empilement et l'algorithme "mode de fixation" (figure 4) est alors activé ;

si la séquence est "zone 0-zone 1", cela signifie que le volet roulant est en train de s'enrouler et l'algorithme "butée franche" est alors activé.

7. Le contenu de la mémoire-du-second-effet (étape 4) est enregistré dans le mémoire-du-premier-effet (étape 2).

8. Retour à l'étape 3.

The process of analyzing the engine torque curve and adapting the behavior of the stop device is carried out according to the following steps, the numbering corresponding to the numbers in Figure 3:

1. Identification of the curve area by means of an area indicator counter incremented if the evolution of the torque is positive and decremented if the evolution of the torque is negative:

if the zone indicator so much to remain absolutely below a certain threshold, rather weak, it means that the counter is successively incremented and decremented and that consequently one is in winding up or unwinding phase , this zone 1 then being signaled by the activation of an indicator "zone 1";

if the zone indicator tends to increase absolutely and exceeds a determined threshold, this means that the shutter is in the stacking or unstacking phase, the zone then being signaled by the activation of an indicator "zone 0 ".

2. The identified area is saved in a first-effect memory.

3. A change of zone is detected.

4. The second identified area is saved in a second-effect memory.

5. The sequence obtained is examined:

if the sequence is "zone 1-zone 0", this means that the roller shutter is in the stacking phase and the "fixing mode" algorithm (figure 4) is then activated;

if the sequence is "zone 0-zone 1", this means that the shutter is rolling up and the "free stop" algorithm is then activated.

7. The content of the second-effect memory (step 4) is saved in the first-effect memory (step 2).

8. Return to step 3.

Fixing mode algorithm

On teste si le couple reste nul un certain temps. Si c'est le cas, cela signifie qu'on est dans la zone E et l'automatisme interrompt immédiatement l'alimentation du moteur.

On teste si la pente du couple change de signe. Si c'est le cas, cela signifie qu'on est dans la zone D et l'automatisme interrompt alors le moteur dès le couple a atteint un seuil élevé.

On teste également si le couple évolue à nouveau, mais lentement, ce qui signifie alors qu'on est dans la zone F. L'automatisme interrompt alors immédiatement l'alimentation du moteur.

It is detected if the motor torque is canceled while the motor is supplied, which means that the shutter blades are stacked. We then proceed to the following three tests:

We test if the couple remains zero for a certain time. If this is the case, it means that you are in zone E and the automation immediately interrupts the power supply to the motor.

We test if the slope of the couple changes sign. If this is the case, it means that we are in zone D and the automation then stops the motor as soon as the torque has reached a high threshold.

We also test if the torque changes again, but slowly, which means that we are in zone F. The automation then immediately stops the power supply to the motor.

Frank stop algorithm

We test if the engine torque changes strongly from monotonous. If so, it means that the roller shutter reaches the upper end position and the automation then immediately stops motor power.

Claims (6)

1. A device for controlling a drive motor of a motorized roller blind consisting of stackable slats, said device comprising an automatic control reacting to a variation in the drive torque, characterized in that said automatic control comprises means for identifying the type of end of travel of the roller blind, said means operating by analyzing the variation in the drive torque, and means for adapting the control of the stopping of the motor to the type of end of travel identified.
2. The control device as claimed in claim 1, characterized in that the automatic control comprises an LPU containing a program for analyzing the variation in the drive torque, according to which program, the following are performed:

   determining whether the roller blind is in the winding or unwinding or stacking or unstacking phase,

   recording the detected state,

   awaiting the detection of a state different from the recorded state,

   recording this different state, and

   determining the type of end of travel by analyzing the sequence of the two recorded states.
3. The device as claimed in claim 2, characterized in that, furthermore, the automatic control is programmed in such a way that, in the event that an unwinding/stacking sequence has been determined, it detects the cancellation of the drive torque corresponding to the end of the stacking of the slats and analyzes the trend of the drive torque from zero, in order to determine the type of fastening of the roller blind to its winding shaft and to control the stopping of the motor as a function of the trend detected.
4. The device as claimed in claim 3, characterized in that, furthermore, the automatic control is programmed so as to interrupt the power to the motor immediately if the torque remains zero for a predetermined time or if the torque changes slowly from zero and, if this torque increases rapidly, to interrupt the power to the motor when the variation in the drive torque reaches a predetermined value.
5. The control device as claimed in one of the claims 2 to 4, characterized in that, furthermore, the automatic control is programmed in such a way that, in the event that an unstacking/winding sequence has been determined, it controls the stopping of the motor when the variation in the drive torque exceeds a predetermined value.
6. The device as claimed in one of the claims 2 to 5, characterized in that, the means for analyzing the variation in the drive torque comprise a counter, this counter being incremented when the torque increases and being decremented when the torque decreases, the automatic control deducing that the roller blind is in the unwinding or winding phase if the state of the counter remains below a particular threshold, and deducing that the roller blind is in the stacking or unstacking phase if the state of the counter exceeds a particular threshold or falls below a particular threshold respectively.

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