EP0573388B1 - Generating device for characteristic signals of the displacement of a closure means - Google Patents

Abstract

The signal-generating device consists of a friction element (11) which is integral with the closure means, for example a roller shutter (2), this friction element rubbing on a fixed rigid element capable of being driven in vibration by the friction element and extending over at least the length of the travel of the closure means, and of a vibration sensor (7) mounted on the rigid element and delivering a signal characteristic of these vibrations. The vibrating rigid element can be made up of a blade (9) fixed in one of the slides of the roller shutter or of the slide itself (3). The signals delivered by the sensor can be used for checking the control of the closure means and for detecting attempts at entry. <IMAGE>

Description

The present invention relates to a device generating signals characteristic of the movement of a closing means, such as a shutter, rollable or not, blind or door.

Such generators are used for commanding and controlling the movement of closing means, in particular for detecting obstacles, detecting intrusion attempts and controlling the stopping of the closing means at the end of the travel.

A signal generator device associated with a motorized roller shutter is described in patent FR 2 657 646. This generator comprises a pulley mounted on the winding axis of the roller shutter and on which is wound a flexible element whose other end is connected to the end of the shutter, so that the unwinding of the shutter drives the pulley whose axis is mechanically connected to a signal generator, for example a synchronous motor. The generator, arranged laterally on the winding axis, therefore requires a space which is not always available in a window frame or a door frame. On the other hand, the flexible element connecting the generator pulley to the final bar of the roller shutter is unattractive and this flexible element can be accidentally hung or damaged due to its unprotected passage, such an incident being liable to seriously disturb the operation of the roller shutter.

The present invention aims to overcome these drawbacks.

The signal generator device according to the invention is characterized in that it comprises a wiper secured to the closure means, a rigid rigid element capable of being driven in vibration by the wiper and extending over at least the length of the stroke of the closure means so that the wiper rubs on the rigid element during movement of the closure means, and a vibration sensor rigidly mounted on the rigid element and delivering a signal characteristic of these vibrations.

The closing means generally comprise guide means in the form of a slide, so that the wiper can move in the slide while being hidden and perfectly protected.

The rigid vibrating element can be constituted by the slide itself or by the guide slide of a tilting or side-moving door or by an element attached to this slide or this slide.

The invention also relates to a motorized closure equipped with at least one signal generator device according to the invention, this closure being characterized in that it further comprises electronic means for processing the signal emitted by the vibration sensor and means for controlling the drive motor or motors of the closing means as a function of the orders received from the signal processing means.

The control means can ensure both the closure stop, when the latter encounters an obstacle, as well as the triggering of an alarm in the event of an attempt intrusion, as well as the closure stop at the end of the stroke and / or in intermediate positions, using a toothed or grooved vibrating element allowing to obtain a vibration having periodic variations corresponding to its teeth or grooves and therefore characteristics of the closing position.

When controlling a roller shutter with stackable blades, it is possible to obtain a stop in the open position and a stop in the stacked position by means of two wipers, one of which is located on the lower blade and the other on the blade penetrating the slide just before the lower blade comes to a stop.

The use of two vibration sensors, one per slide, and two wipers makes it possible to define an intermediate position and / or several operating zones.

The accompanying drawing shows, by way of example, embodiments of the invention.

Figure 1 is a sectional view of a roller shutter equipped with a generator according to the invention.

Figure 2 shows a detail of Figure 1.

FIG. 3 represents an alternative embodiment of FIG. 2.

Figure 4 shows the detail, in vertical section along IV-IV of Figure 5, of an exemplary embodiment of the vibrating element and the wiper.

FIG. 5 is a sectional view along V-V of FIG. 4.

Figures 6 and 7 show two other embodiments of the vibrating element.

FIG. 8 represents the diagram of the signal processing means and of the means for controlling the rolling stock shown in FIG. 1.

FIG. 9 represents a first embodiment of the reference signal generator.

FIG. 10 shows a simplified embodiment of the reference signal generator.

FIG. 11 represents the main program of the control means.

FIG. 12 represents a variant of a sub-program for controlling the shutter shutter.

FIG. 13 represents a variant of a subroutine for triggering an alarm in the event of an intrusion attempt.

FIG. 14 represents the decoding circuit of an alternative embodiment with two sensors.

FIG. 15 represents the diagram of a wired execution of the control device.

FIG. 16 represents a variant of the main program for the case of transmission of signals with periodic variations.

Figure 17 shows the variation counting routine.

Figure 18 shows the alarm routine.

FIG. 19 represents a modification of the program of FIG. 16 making it possible to obtain intermediate stop positions.

FIG. 20 represents the counting subroutine of the variant represented in FIG. 19.

Figure 1 shows, in vertical section, a window frame 1 in which is mounted a rolling shutter 2 guided in a pair of runners 3 and winding on a winding axis 4 mounted in a housing 5 and driven by a motor not shown. The motor has two windings ensuring the rotation of the winding shaft 4 in two opposite directions. The roller shutter 2 is shown here in the fully unrolled position. Its last blade is provided with an end of travel stop 6 constituted by a lug intended to abut against the top of the embrasure 1. The slide 3 is extended by a part 3a in the housing 5 and at the end of this extension 3a is rigidly fixed a vibration sensor 7. On the last blade 8 of the roller shutter is further fixed a wiper, for example a steel blade whose free end rubs on one of the inner faces of the slide whose the surface has been roughened or grainy by sandblasting.

When moving the shutter 2, the friction of the wiper 11 on the slide 3 generates vibrations which are transmitted by the slide to the sensor 7. The vibration sensor can be of the accelerometer or piezoelectric or ferroelectric shock detector type, of micro-machined silicon with integrated processing electronics, for example a sensor sold by MURATA under the trade name PKS-4A.

The signals emitted by the sensor 7 are processed by a control device 13 controlling the motor of the winding axis 4. The installation is completed by a remote control 14, connected galvanically or not to the control electronics 13 and comprising keys for controlling the raising, lowering and stopping of the shutter.

Instead of rubbing directly on the slide, the wiper can rub on an auxiliary vibrating element. The detail of an embodiment is shown in Figure 2. The vibrating element consists of a steel blade 9 fixed on one of the inner faces 10 of the slide 3 and on which a friction shoe 11 rubs. The opposite face 12 of the slide is smooth and the last blade 8 is provided with a shoe 15 sliding on the face 12. In the case of FIG. 2, the stop 6 abuts against the embrasure when the flap arrives at high position, the vibrations cease and the detector 7 detects the absence of vibration and controls the stopping of the engine.

FIG. 3 represents an alternative embodiment of FIG. 2, in which the stop 6 is removed and the vibrating element 9 is shorter. The upper position of the shutter is reached when the wiper leaves the vibrating element 9. This execution allows the shutter to stop smoothly, without sudden pulling. She is particularly advantageous in the case of fragile roller shutters.

Figures 4 and 5 show, in more detail, an embodiment and mounting of the wiper 11. It is fixed by riveting, welding or clipping at a point 17 inside the last tubular blade 8 of the shutter rolling and passes through this blade through a slot 18. The wiper 11 has a curved end 11a in contact with the vibrating element formed here by the slide 3 itself.

In FIG. 6, the vibrating element consists of a rough blade 19 fixed to the slide by means of an adhesive 20.

In the embodiment according to FIG. 7, the rough blade 19 is replaced by a blade 21 having a serrated profile 22. This profile could also be serrated. Such a profile makes it possible to obtain a periodic variation in the amplitude of the vibrations, each variation corresponding to a tooth or a niche. The counting of these variations makes it possible to determine the position of the wiper, that is to say the position of the roller shutter.

The principle described above is applicable to any closing means guided in its movement, whether by a slide, a rail or hinges.

The control device 13 is shown diagrammatically in FIG. 8. It consists of processing electronics 23 and control electronics 24 for controlling the motor 25.

The processing electronics include an amplifier-demodulator 26, a reference generator 27 and a comparator 28. The function of the amplifier-demodulator 26 is to receive the signal delivered by the sensor, to amplify it, possibly to rectify it, to smooth it out and to deliver to the comparator 28 to which is applied, on the other hand, a reference value delivered by the reference generator 27.

The reference generator 27 can be constituted by a simple voltage divider R1 / R2, as shown in FIG. 10, delivering a fixed voltage value. The reference generator 27 can also be designed to deliver a reference value derived from the value of the signal picked up, as shown in FIG. 9. In this case, it consists of a voltage divider R1 / R2 in parallel to a capacitor C, all in series with a resistor R3 to which the sensed signal is applied. This allows to take into account the variation of the signal received due to the aging of the sensor or to any other influence and to automatically adapt to the signal level corresponding to the use.

The comparator 28 has the function of comparing the value of the signal received from the amplifier-demodulator 26 to that received from the reference generator 27 and of delivering a logic signal (0 or 1) according to the relative level of the compared values. In the particular case, the comparator 28 delivers the signal 1 when the value of the signal picked up is greater than the reference value.

The control electronics 24 comprises a microprocessor 29 comprising a main program (FIG. 11), inputs DM (request for ascent), DD (request for descent), DS (request for stop), outputs SM (output of ascent), SD (descent output), SA (alarm) and an SL input (logic output) connected to the output of comparator 28. Its main function is to set the SM, SD, SA outputs to 0 when the signal received in SL = 0.

As shown in the drawing, the microprocessor 29 further includes a fourth DPI input (intermediate position request), a position counter 291 and a reaction time counter 292, a memory 294 for storing the alarm reaction time or the minimum position variation for triggering an alarm and a memory 295 for storing the value of the position counter. These elements are used in a more advanced embodiment of the invention which will be described in relation to FIGS. 16 and 17.

The control electronics 24 further comprises a power switching device 30 connected to the PN network and to each of the direction 1, direction 2 windings of the motor 25, by outputs M and D, as well as to an alarm 31 by a output A, and at the outputs SM, SD, SA of the microprocessor 29. Its function is to interrupt the supply to M, D and A, when the outputs SM, SD and SA = 0. The control device 13 further comprises a stabilized supply 32 for supplying various components.

The execution mode corresponding to the program represented in FIG. 11 includes two end of travel or obstacle indicators, up and down FCM and FCD positioned high by the stop subroutines, respectively in the direction of ascent (M) and descent (D) and reset to zero when moving in the opposite direction.

The operation according to the program shown in Figure 11 is as follows:

The first instruction performs cyclic scanning of the inputs DM, DD, DS, SL of the microprocessor. If DS = 1 (stop request activated), the SM and SD outputs are reset and the program loops.

If DS = 0 (stop request not activated), the program then tests the DM input (rise request). If DM = 1, the next instruction tests the FCM flag. If FCM = 1 (flap in high position), the program loops. If FCM = 0, the following instruction sets the output SM to 1, then calls the stop subroutine which tests the input SL, that is to say the signal from sensor 7. If SL = 1 (presence of a vibration), the following instruction sets the end of travel indicator low to 0 (FCD = 0) and the program loops without giving an ascent command, since the presence of a vibration signal means that the flap has not encountered any obstacle or that its wiper has not yet left the vibrating element 19 (FIG. 3), that is to say that the flap has not yet reached its position high.

If SL = 0 (absence of vibration), the following instruction changes the SM output to 0, the absence of vibration signifying that the roller shutter has encountered an obstacle or that it has reached its highest point (Figures 2 or 3 ) and sets the FCM flag to 1.

If the DM test gives 0, the program tests the DD input. If DD = 1 (descent request), the following instruction tests the FCD indicator. If FCD = 1 (shutter already in low position), the program loops without giving stop order. If FCD = 0, the next instruction sets SD = 1 and the next instruction tests the SL output. If SL = 0 (no vibration), the following instruction sets the SD output to 0 (stop command) and the FCD flag to 1. If SL = 1, the FCM flag is set to 0 and the program loop without giving a descent order.

If the test gives DD = 0 (no lowering request), the alarm subroutine tests the SL input. If SL = 0, no alarm is triggered, as this means that the shutter is stationary and that there has been no attempt at intrusion. On the other hand, if the test gives SL = 1, this means that the shutter moves in the absence of an up and down order and the SA output goes to 1, which has the effect of triggering the alarm.

This embodiment therefore makes it possible to stop at the end of the race at a high, low stopping point and in the event of obstacles, by detection of the interruption of the vibrations, as well as the detection of an intrusion attempt by appearance. vibrations.

In a simplified form, the alarm subroutine could be deleted.

According to another embodiment, the control electronics 24 is also provided to test that the change of the logic order on the output SL of the comparator remains a certain time before suspending the transmission of the direction 1 movement orders. / sense 2 or before transmitting an alarm command.

In this case, the Up and Down stop subroutines of figure 11 are replaced by the subroutine according to figure 12 and the microprocessor includes a memory 293 storing the stop reaction time value and a stop reaction time counter 292.

According to FIG. 12, if the test of the logic output gives SL = 0, the instruction 33 increments the stop reaction time counter 292. The following instruction is a test instruction 34 which compares the counted value with the stored value. If the counted value is greater than the memorized value, then only the SM and SD outputs are set to zero by the following instruction and the program loops. Simultaneously, instruction 35 resets counter 292 to 0.

On the other hand, as long as the test instruction 34 tests that the counted value is less than the memorized value, the program loops without issuing a stop command.

The alarm subroutine of FIG. 11 is also completed as shown in FIG. 13, in a similar manner to the shutdown subroutine of FIG. 12. The microprocessor includes a memory 294 storing the value of reaction time d 'alarm.

If SL = 1, instruction 36 increments counter 292 and instruction 37 compares the counted value with the value stored in memory 294. If the counted value is greater than the stored value, the SA output goes to 1 and a alarm is triggered. Simultaneously, instruction 38 resets the counter to 292 at 0.

This embodiment makes it possible to avoid stopping or triggering alarms resulting from false faults, such as those caused by shocks, hard points in the slide, fugitive obstacles.

In the case of closing systems with stackable blades or equivalent, the safety-stop device which has just been described leads to stopping the descent in the non-stacked blade position (so-called "openwork" position if the wiper has been arranged on the lower blade of the closure (blade 8).

If the user prefers a stop in a stacked position (fully closed), it is advisable to have a second wiper on the blade penetrating the slide 3, in contact with the vibration element, just before the low blade arrives in stop. This variant does not require any modification of the algorithms and the sensor.

Another interesting embodiment consists in using two vibration sensors, one per slide. This embodiment makes it possible to define an intermediate position and / or several operating zones. The intermediate position here corresponds to the "openwork" position described above.

A first wiper A is disposed on the lower blade 8 of the shutter, on the side of a first slide 3A (or of the corresponding vibration element). The second wiper B is placed on the side of the slide 3B (or of the corresponding vibration element) and it is placed on the blade penetrating the slide 3B (or coming into contact with the corresponding vibration element) when the flap arrives in the intermediate position.

FIG. 14 represents the decoding of the four usable zones. SLA and SLB represent the signals delivered by each of the sensors in the presence of vibrations. The algorithms for exploiting this information are within the reach of those skilled in the art.

If there is a signal on SLA and SLB (A = 1), this means that the lower blade of the shutter is still moving while the other blade is already in the slides. This corresponds to a very small transition zone between the stacking of the blades and the opening.

If there is a signal on SLB only then B = 1, which corresponds to a movement in the stacking area.

If there is a signal on SLA only then C = 1, which corresponds to a movement in the opening zone.

If there is no signal then D = 1. In this case, it is advisable to test whether there is an order of Ascent (SM) or of Descent (SD).

If SM = 1, it means that the shutter is in high stop.

If SD = 1, we can have two different situations depending on the previous state of outputs B and C.

If we had C = 1, D = 1 should be interpreted as the presence of an obstacle preventing the descent of the flap.

If we had B = 1, D = 1 means that the shutter blades are completely stacked and that the shutter is therefore completely closed.

FIG. 15 represents a particularly simple embodiment of the logic of the control device 13 indicated by the control algorithms of FIGS. 11 and 12 (alarm function excluded).

This embodiment uses wired logic and requires only three current integrated circuits (for example TL 084, MC 14538 B, 74 C 74) possibly replaceable by a single circuit of the ASIC type. A unipolar established power supply 71 supplies a supply voltage + Vcc to the entire assembly. This voltage is divided by two to allow, at the output of a follower 72, a potential reference used as virtual ground for the analog part of the circuit.

The piezoelectric detector 7 sees its output signal amplified by two operational amplifiers 74 and 75, with elimination of any continuous components.

The amplified signal is applied to the input (+) of an operational amplifier 76 which is used in comparator mode.

The output levels of comparator 76 then correspond to the saturation voltages of the operational amplifier and are close enough to + Vcc and 0 to attack CMOS type logic. Each vibration detected and amplified causes the output of the comparator 76 (equivalent to the signal SL of the programmed execution) to go to the "high" state as long as the amplified level is greater than a reference voltage applied to the input ( -) of comparator 76 by a resistive divider bridge.

Amplifiers 72, 73, 74, 75, 76 belong to the same integrated circuit (for example TL084). The output of comparator 76 is applied to a monostable 77 (retriggerable one shot, for example MC 14538 B) whose output Q * goes to the low state for a fixed duration T when the input A undergoes a transition from the "low" state to the "high" state. This duration T is always counted from the last upward transition of the input if several pulses are applied to it.

The duration T is chosen so as to be greater than the maximum time separating two pulses during the movement of the wiper on the vibration element. The output Q * therefore returns to the high state only if the vibrations disappear for a duration greater than T.

In this case, two flip-flops 78 and 79, of type D Flip-Flop (example MM 74 C 74) record the state present on the Data input. This state is taken from the collectors of two transistors 80 and 81. One or the other of the transistors is conductive in the event of movement. In the Up SM direction, the transistor 80 is conductive. In the SD down direction, transistor 81 is conductive. The collector of the conducting transistor is in the "low" state while the collector of the blocked transistor is in the "high" state.

The flip-flop 78 or 79 therefore records a "low" state on its output Q * if the vibration ceases while the direction SM or SD is activated.

This has the effect of blocking the conduction of the corresponding transistor.

This blocked state is maintained as long as the other transistor has not been made conductive, therefore as long as the user has not given an order of movement in the opposite direction.

When the other transistor is made conductive, the passage to the "low" state of its collector causes an action to reset to the "high" state of the output Q * of the flip-flop by action on its Preset input.

The circuit further comprises a switch 84 with three positions: DD, STOP (intermediate position) and DM controlled by the remote control 14.

85 and 86 designate transil diodes or other protection devices intended to avoid induced variations in potential of high amplitude on the emitter of a transistor not connected to ground by the switch 84.

A description will now be given, in relation to FIGS. 16, 17 and 18, of an embodiment using a serrated or grooved vibrating element such as the vibrating element 21 of FIG. 7.

In this case, the sensor 7 is designed to emit at least one signal of higher value on the passage of each tooth or slot and the reference value supplied by the reference generator 27 of the processing electronics 23 is fixed so as to that the processing electronics does not deliver a 0 or 1 signal on the SL output until each reception of this higher value signal. These signals are counted by the position counter 291 of the microprocessor 29 and the number of signals transmitted is stored in memory 295.

The corresponding program is shown in Figure 16. In addition to the instructions contained in the basic program according to Figure 11, the program according to FIG. 16 comprises the following instructions: a request and initialization (DI) instruction 39, an instruction 40 for scanning the DD input (descent request), an instruction 41 for resetting the position counter 291 to zero, a instruction 42 for initializing a counting subroutine, an instruction 43 for copying the value counted by the counter 291 into the position memory 295, an instruction 44 for reading the position counter 291, an instruction 45 for comparing from the counted value to the value stored in 295, an instruction 46 for initializing the counting subroutine, an instruction 47 for comparing the counted value with the stored value, an instruction 48 for initializing a subroutine ascent, an instruction 49 for testing the value counted by the position counter 291 and an instruction 50 for initializing the counting subroutine. Instructions 42, 46 and 50 initialize the same counting routine.

Instruction 45 tests whether the value counted is greater than or equal to the value stored in the position memory 295.

The test instruction 47 tests whether the counted value is greater than or equal to the value stored in the position memory 295.

Instruction 48 allows the shutter to be raised if it has encountered an obstacle.

Instruction 49 tests whether the counted value is less than or equal to 0.

The program runs as shown in Figure 16 and a more detailed description is considered unnecessary.

This embodiment makes it possible, in the case of the descent of the roller shutter, to distinguish the arrival in the low position (closed position) from the arrival on an obstacle and, in this case, to activate the subroutine of ascent 48 to clear the obstacle.

The counting and alarm subroutines may or may not include instructions intended to prevent the sending of a stop or alarm order, respectively, before the reception of a certain number of signals. The counting and alarm subroutines are developed in Figures 17 and 18 respectively. The alarm subroutine is optional.

The counting subroutine represented in FIG. 17 comprises an instruction 51 for incrementing the reaction time counter 292, an instruction 52 testing whether the reaction time counted by the counter 292 is greater than the reaction time stored in the memory 294, an instruction 53 for incrementing / decrementing the position counter 291 and an instruction 54 for resetting the reaction time counter 292. The outputs SM and SD are set to zero if instruction 52 tests that the time of reaction counted is greater than the memorized value. As pointed out above, we can delete the instructions S1 and S2 if we refrain from introducing a reaction time.

The alarm subroutine represented in FIG. 18 includes an instruction 55 for incrementing an alarm reaction time counter, an instruction 56 testing whether the reaction time counted is greater than the stored time, an instruction 57 for resetting the alarm reaction time counter, an instruction 58 for incrementing a counter for variation of the minimum alarm position, an instruction 59 testing whether the value counted by the mini alarm position variation counter is greater than or equal to a value stored in memory 294 and an instruction 60 for resetting the mini alarm position variation counter to zero.

Instructions 55 and 56 can be deleted if the introduction of a reaction time is dispensed with.

This embodiment makes it possible, as in the initial embodiment, to avoid stops or alarms resulting from false faults.

The subroutines according to Figures 17 and 18 can be used together or separately.

The characteristic position signals obtained by means of a toothed or grooved vibrating element, as described in the previous embodiment, can be used to determine intermediate positions of the roller shutter.

For this purpose, it suffices to count the signals on the output SL of the processing electronics 23. Each signal is assigned a number corresponding to a tooth or a slot and the microprocessor 29 also has a memory for storing the number of signal, memory which can be programmed manually or by programming according to the total number of signals emitted during the movement of the shutter between its extreme positions, as well as the DPI (intermediate position request) entry shown in Figure 8.

The program represented in FIG. 16 is supplemented by the subroutines represented in FIGS. 19 and 20.

The subroutine shown in Figure 19 is an intermediate position request subroutine. It includes an instruction 61 for testing the state of the DPI input (intermediate position request), a test instruction 62 testing whether the value of counted signals is greater than the value stored in the memory for storing the signal number corresponding to an intermediate position, a test instruction 63 testing whether the counted value is less than the stored value and an instruction 64 initializing a DPI counting subroutine (request for intermediate position). Instructions 65 and 66 can be deleted if the introduction of a reaction time is dispensed with.

If the DM input (figure 16) = 0, instruction 61 tests the DPI input. If DPI = 0, the loopback program or the alarm subroutine is initialized if such a subroutine exists.

If DPI = 1 (intermediate position request), the program continues with the test instruction 62 which tests whether the number of signals counted is greater than the stored number counted from the high position. If the counted value is not greater than the memorized value, the program continues with the test instruction 63. If 63 tests that the counted value is less than the memorized value, which means that the wiper is above from the desired intermediate position, the SD output then changes to 1 and the program continues with the DPI counting routine, as shown in Figure 20.

If instruction 63 tests that the counted value is greater than or equal to the memorized signal number, which means that the intermediate position is reached, the outputs SM and SD are reset and the motor 25 is not supplied.

If instruction 62 tests that the counted value is greater than the stored signal number, this means that the wiper is below the intermediate position. The output SM is set to 1 and the instruction 64 ′ calls a DPI counting subroutine analogous to the subroutine represented in FIG. 20, but without the ascent subroutine 67 since there is (already) an order climb.

The DPI counting subroutine, as shown in FIG. 20, is only initialized when going down. Its function is to test if we still have a vibration when we have a descent order. If the vibrations stop, it means that the shutter has encountered an obstacle. The descent subroutine comprises an instruction 65 (optional) for incrementing the reaction time counter 292, a test instruction 66 (optional) testing whether the reaction time counted is greater than the reaction time stored in memory 293, an ascent routine 67, an instruction 68 for incrementing / decrementing the position counter 291 and an instruction 69 for resetting the reaction time counter 292. This subroutine is identical to the subroutine counting routine. FIG. 17, with the difference that it additionally includes the ascent routine 67, not developed, which provides a slight rise of the shutter when it has encountered an obstacle, i.e. if SL = 0 while SD = 1.

This embodiment allows the closure to be automatically stopped in a position located between the extreme positions and is particularly advantageous, for example, for stopping a rolling shutter in the open position, that is to say in a low position in which the shutter blades are not stacked on top of each other.

Claims (19)

1. Device for generating signals characteristic of the displacement of closing means, such as shutters, blinds or doors, characterised in that said device comprises a sliding contact (11) suited for being fixed on the closing means, a fixed rigid element (3;16,19;21) suited for being driven in vibration by the sliding contact and extending on at least the length of the stroke of the closing means so that the sliding contact rubs against the rigid element during the displacement of the closing means, and a vibration sensor (7) rigidly mounted on said vibrating rigid element and delivering a signal characteristic of said vibrations.
2. Device as claimed in claim 1, characterised in that the surface of the fixed rigid element in contact with the sliding contact is indented (21) or grooved in order to obtain vibrations with periodically varying intensities.
3. Device as claimed in claim 1 or 2, characterised in that the vibrating rigid element is constituted by a slide or a guide rail for the closing means.
4. Device as claimed in claim 1 or 2, characterised in that the vibrating rigid element is fixed on a slide or a guide rail of the closing means.
5. Motorised closing characterised in that it comprises a device for generating signals as claimed in claims 1 to 4 and electronic means (23) for processing the signal emitted by the vibration sensor (7) and means for operating (24) the motor or the motors (25) actuating the closing means depending on the orders received from the signal processing means.
6. Closing as claimed in claim 5, comprising a motor (25) with two windings for driving the closing means in the closing and in the opening direction, characterised in that the signal processing means (23) comprise a signal amplifier/demodulator (26), a reference generator (27) for delivering a reference value, a comparator (28) to which the demodulated signal and the reference value are applied, said comparator delivering a logical signal (0,1) depending on the relative position of the compared values, and in that the operating means comprise a microprocessor (29) including a main program (figure 11), ascent (DM), descent (DD), and stop (DS) inputs, ascent (SM) and descent (SD) outputs and one input (SL) connected to the output of the comparator, and which principal function is to change to 0 the ascent (SM) and descent (SD) outputs when the signal received from the comparator is equal to 0, and a power commutation element (30) connected to each winding of the motor through the ascent and descent outputs and to the ascent and descent outputs of the microprocessor and which function is to cut the power supply on the ascent and descent outputs (M,D) of the commutation element when the ascent and descent outputs of the microprocessor are equal to 0.
7. Closing as claimed in claim 6, characterised by the fact that the microprocessor (29) further comprises a memory for storing the reaction time and a counter of time reaction and in that the main program is completed by a sub-program (figures 12 and 13) allowing to test that the change of the logical value on the output (SL) of the comparator (28) remains a predetermined time before emitting a stop order for the motor and/or an alarm.
8. Closing as claimed in claim 6, characterised in that the surface (22) of the vibrating rigid element in contact with the sliding contact is indented or grooved in order to obtain a vibration which amplitude varies on each groove or dent, in that the sensor (7) is arranged for emitting a signal which amplitude changes depending on that of the vibration, in that said reference value is fixed in such a way that the comparator (28) only delivers a logical signal (0,1) at each change of amplitude of the signal emitted by the sensor and in that the microprocessor (29) further comprises a counter for counting the number of states at the output of the comparator and a memory storing the number of changes of state counted when the closing means goes over its full displacement length, and means for comparing the number of change of state counted during the displacement of the closing means with the number stored in the memory, in order to distinguish between the arrival in a closed position and the arrival on an obstacle (figure 16) and in this case to possibly activate a sub-program of partial ascent.
9. Closing as claimed in claim 8, characterised in that the microprocessor (29) further comprises a counter (292) of reaction time, a memory (294) for storing a reaction time value, and in that the main program is completed by a sub-program (figure 17) allowing to test that the change of the logical value on the output (SL) of the comparator remains a determined time before emitting a stop order.
10. Closing as claimed in claim 8 or 9, characterised in that it comprises an alarm (31) and in that the microprocessor further comprises a memory for storing a determined number of signals (SL) and an alarm signal counter and in that the program (figure 16) is completed by an alarm sub-program (figure 18) ensuring that the alarm is set only when the counted value is higher than the stored value.
11. Closing as claimed in any of claims 8, 9 or 10, characterised in that the operating means (24) further comprise a memory for storing a signal number corresponding to the state of the counter when the closing is in intermediate position and an input for demand of intermediate position (DPI) and in that the program further comprises a sub-program for demand of intermediate position (figure 19) and a sub-program for counting the signals (figure 20), in order to obtain a stop of the closing in an intermediate position.
12. Closing as claimed in claim 11, characterised in that the sub-program for counting the demand of intermediate position (figure 20) further comprises an ascent sub-program (67).
13. Control device for motorised closing with guided movement comprising position references (22), detection means (21,11,7,13) of said position references, a counter (291) for counting the position references met by the closing during its displacement, a memory (295) in which determined positions are stored and a logical treatment unit (24) for addressing orders to the motor (25) depending on the position references counted and the positions memorised, characterised in that the detection means comprise a sliding contact (11) suited for being fixed on the closing means, a rigid fixed element (3;9,19;21) susceptible to be driven in vibration by the sliding contact and extending at least on the length of the stroke of the closing means so that the sliding contact rubs against the rigid element during the displacement of the closing means, a vibration sensor (7) rigidly mounted on said vibrating rigid element and delivering a signal characteristic of said vibrations and electronic means (23) for the treatment of the signal emitted by the sensor.
14. Motorised closing as claimed in any of claims 5, 6 or 7 in which the closing means comprise a roller blind with slats that can be stacked or spaced in closed position, characterised in that said closing comprises a first sliding contact fixed to the lower slat (8) and a second sliding contact fixed to a higher slat penetrating in the slide (3) and coming into contact with the vibrating element (3;9;19) right before the lower slat (8) reaches its abutment in closed position, in order to only stop the motor after all the slats being in the slide are stacked.
15. Motorised closing as claimed in any of claims 5, 6 or 7 in which the closing means is a roller blind with slats driven by two slides, characterised in that it comprises a vibrating element and a sensor in each slide, a first sliding contact fixed to the lower slat (8) and rubbing against one of the vibrating elements for delivering a first signal (SLA), and a second sliding contact fixed to an intermediate slat penetrating the slides and in contact with the other vibrating element when the lower slat (8) reaches an intermediate position and delivering a second signal (SLB), and in that the electronic control means comprise a decoding circuit (figure 14) with four outputs allowing to distinguish four states corresponding to the four combinations of output states of the sensors.
16. Closing as claimed in claim 15 comprising a motor (25) with two windings for two senses of rotation corresponding to the descent and the ascent of the roller blind and a control unit that can deliver an ascent order (SM = 1) or a descent order (SD = 1), characterised in that the electronic control means further comprise means for memorising the precedent state of the outputs of the decoding circuit, for allowing to distinguish, in descent, between a stop due to an obstacle and a stop in totally closed position, with stacked slats.
17. Motorised closing as claimed in claim 5, comprising a motor (25) with two windings for driving the closing means in the closing and in the opening direction, characterised in that the means for treating the signal of the sensor (7) comprise a circuit (71,72) delivering a reference voltage, an amplifier circuit (74,75), a comparator (76) comparing the amplified signal to the reference voltage, the output of said comparator, which can take a "high" state or a "low" state, being applied to a resettable monostable, the output Q* of which changes to a "low" state during a fixed period (T) superior to the maximal time separating two pulses when the sliding contact rubs against the vibrating element and goes back to a "high" state only if the vibrations disappear during a period superior to said fixed period (T).
18. Closing as claimed in claim 17, characterised in that the treatment means further comprise two toggles (78,79) on which the output Q* of the resettable monostable (77), one of said toggles (78) being connected to a circuit (80,82,84) detecting an ascent movement (SM) and the other toggle (79) being connected to a circuit (81,83,84) detecting a descent movement, for recording a defect in the toggles, through a determined state, that is if the vibration stops although the motor is activated in ascent or in descent, said circuits further being designed for maintaining the recording of the defect as long as a movement order in reverse direction has not been given.
19. Closing as claimed in claim 18, characterised in that said circuits (80,82,84 and 81, 83, 84) each comprise a transistor (80,81) with its collectors respectively connected to the Data input of each toggles (78,79) and its emitters respectively connected to two terminals (DD,DM) of a control switch (84) for controlling the ascent and the descent of the shutter, one or the other of the transistors being conductive in case of a movement instruction, a defect recorded in one of the toggles having the effect of stopping the conduction of the corresponding transistor, this blocked state being maintained as long as the other transistor has not been rendered conductive by the change of state of the control switch, that is by the occurrence of a movement instruction in reverse direction.

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