WO2006008628A1

WO2006008628A1 - Method for controlling a motor-driven closing device

Info

Publication number: WO2006008628A1
Application number: PCT/IB2005/002016
Authority: WO
Inventors: Daniel Goudey; Thierry Genin; Emmanuel Carvalheiro; Yannick Beaufour
Original assignee: S.I.M.U.
Priority date: 2004-07-13
Filing date: 2005-07-01
Publication date: 2006-01-26
Also published as: FR2873223B1; EP1769466B1; FR2873223A1; EP1769466A1

Abstract

The invention relates to a control method that can be applied to a closing device comprising an electronic label reader (TRA) that can emit an interrogation signal (S11), and at least one electronic label (ETG) that can generate a response signal when it is in the range of the reader. The inventive method is characterised in that it comprises the following steps: the motor (MOT) is activated in such a way as to displace the closing element (LAR) as long as the reader detects a valid response signal (S13, S14); and the power supply to the motor is cut if a valid signal is not detected by the reader (S12, S13, S17). The power-cutting step comprises a sub-step for acting on means (K1, K2) for inverting the direction of displacement of the element in such a way that the subsequent displacement of the element is carried out according to the opposite direction to that of the last displacement of the element (S15).

Description

Method of controlling a motorized closure device

The invention relates to a control method defined according to the preamble of claim 1. The invention also relates to a device for implementing this method.

The controls of certain equipment of grills for industrial or commercial closures require that their maneuver is carried out under conditions of security imposing the presence of the user in the vicinity of the closing device or in a precise place. Such commands are often referred to as "deadman" commands. The means for issuing the command orders are then often constituted by a key switch, an electrical contact being established when the key is moved in rotation in the switch. Having this switch close to the grid ensures that the user has a view of the moving device, to avoid any accident. Because of the target it constitutes for vandals and for the sake of convenience, it is desirable to remove this type of switch.

To solve this problem, it has been imagined to replace this key switch by a nomadic controller.

For example, FR 2 834 813 discloses a device for controlling the movement of a closure element comprising a fixed receiver and a nomadic transmitter provided with capacitive coupling means. The transmission of control commands is done by capacitive coupling between the transmitter and the receiver when they are placed opposite and when the user presses a button of the transmitter. Also known from application FR 2 838 855 is a device for controlling the movement of a closing element comprising a radio signal receiver and a radio signal transmitter and in which the transmitter is supplied remotely by a high-frequency radio-frequency field. frequency when positioned near the signal receiver. As a result, the transmitter can only issue commands for moving the element when it is positioned close to the signal receiver.

Application FR 2,838,523 also discloses a device for controlling the movement of a closing element comprising a radio-signal receiver and a radio-signal transmitter, in which the receiver analyzes the characteristics of the electromagnetic fields received to determine the position. of the transmitter and to control the movement of the closure member in accordance therewith.

The structure of these devices is relatively complex and they are therefore sometimes too expensive to develop.

No. 6,429,768 discloses a device for remote control of a vehicle. This includes a transponder held by the user and a reader located in the vehicle. The reception of a radio signal emitted by the transponder makes it possible to control a function of the vehicle.

Document US Pat. No. 6,535,136 also discloses a card security device in which the presence of a card and its recognition is necessary to unlock a door lock. Also known from US Patent 4,354,189 a door system can be controlled by an electronic circuit contained in a ring. In this system, the position of the ring relative to the door is decisive for generating a complete opening order of the door and this even if the ring does not remain close to the door after the order has been placed. transmitted to the door actuator.

Also known from US Patent 4,929,877 a garage door actuator. The operation of this actuator in response to a control signal is sequential: the reception of an order signal is interpreted as a movement order in the opposite direction to the last movement of the door. Also in this document, the movements of the door are made until reaching a limit or obstacle.

The object of the invention is to propose a control device improving the methods known from the prior art and overcoming the problems mentioned. In particular, the method according to the invention can be implemented thanks to a device having a simple structure and whose cost is substantially lower than that of known devices of the prior art.

The control method according to the invention is characterized by the characterizing part of claim 1.

Different embodiments of the method are defined by dependent claims 2 to 4.

The motorized device according to the invention is defined by the independent claim 5. Different embodiments of the motorized device are defined by the dependent claims 6 to 11.

The attached drawing shows, by way of example, an embodiment of the method according to the invention and an embodiment of a device for implementing this method.

Figure 1 is a diagram of an embodiment of the device according to the invention.

Figure 2 is a flow chart of an embodiment of the method according to the invention.

Figures 3 to 5 show different embodiments of coupling elements for securing the device in case of failure.

A motorized device 1 for closing an access is shown in FIG. 1. It comprises an access locking element LDR such as a building door, a gate or an access gate. This element is maneuverable in two directions using a motor MOT, the movement of the motor in a first direction of rotation allowing the displacement of the element in a first direction and the movement of the motor in the second direction of rotation allowing moving the element in the second direction. This motor is for example a single-phase induction motor, powered by the ACP line phase of the sector and ACN neutral line of the sector. An MCU microcontroller makes it possible to define the direction of rotation of the motor MOT and to control its running or stopping. For example, a first output DIR1 of the microcontroller and a second output DIR2 of the microcontroller enable by the activation of a first controlled switch K1 or a second controlled switch K2 to define the direction of rotation of the motor. A third output EN of the microcontroller makes it possible to control the supply of the motor by the activation of a third controlled switch KN. The first two controlled switches could form a single inverter, controlled by a single output of the microcontroller. Conversely, the third controlled switch could be removed and replaced by a wire, the power supply of the motor and its direction of travel being then controlled either by the switch K1, or by the switch K2.

MOT motor can also be a DC motor powered by a DC voltage or rectified.

An electronic label reader TRD is connected to the microcontroller MCU by a bidirectional DT link, for example a serial link or a communication bus. The reader includes means for transmitting and receiving radio signals including an antenna ANT and means for analyzing the received signals. The microcontroller MCU can set the tag reader, in particular its polling frequency, and receive the information picked up by the reader.

An ETG electronic tag is shown in Figure 1 in the antenna range area, which is shown as a dashed circle. This label is part of a badge that must present a user to control the operation of the LDR closure element. In the position in which it is represented, the ETG electronic tag is able to generate a response signal corresponding to its identifier ID when it receives a interrogation signal from the reader. The term "response signal" can take, in this application, several meanings that should be defined. The signal of response may be a radio wave emitted by an electronic tag in response to the interrogation signal, in the case where the electronic tag comprises means for receiving and issuing orders. The response signal may also be an image of the signal of the energy consumed by the signal transmission means of the reader when the tag consists of a resonant circuit successively activated and deactivated by a logic switch.

It will be considered for the following that the tag consists of a transponder which, each time an interrogation signal is sent by the reader, transmits, as far as it is in the range, a response signal. including his ID.

In a device configuration procedure, the identifier IDs of all the electronic tags that can be used to control the mobile closure element are stored in a memory MEM of the microcontroller MCU.

Identification systems comprising an electronic tag reader and an electronic tag are known in particular from US Patents 4,546,241 and US 4,893,118. The contents of these patents are incorporated by reference in the present application. In particular, the passages of rows 21 column 2 to 50 column 3 and rows column 4 to 8 column 5 of US patent 4,546,241 describe, with reference to FIG. 1 of this document, the structure of an electronic label reader. and an electronic tag that can be implemented in the present invention.

One embodiment of the method according to the invention is shown in FIG. In a first step S10, a timer is implemented to ensure a waiting time between two polling signal transmissions or between two polls of the tag reader. At the end of this delay, during a second step S11, the reader transmits, via its antenna, an interrogation signal. It is indeed useless for the antenna of the reader to constantly transmit an interrogation signal, a scan every tenth of a second is sufficient. It can even be provided that the scanning delay is variable: it can for example be one second as long as no response signal is detected, then one tenth of a second as soon as a response signal is received and After a delay of several seconds, return to a second. During this step S11, the signal transmissions by the reader TRD, have a sufficient duration to allow the power supply and the response of a label that would be in the range of the antenna.

In a third step S12, it tests whether a response signal is received. This test is generally performed by the TRD reader and its result is transmitted to the microcontroller MCU. If the result of this test is negative, we go to a step S17 in which the output of the microcontroller MCU is deactivated, which has the consequence of opening the KN switch and cutting off the power supply to the motor. In a non-detailed variant, the deactivation step is implemented only if a prior activation has taken place.

If the result of this test is positive, we go to a step S13 in which the information, and in particular the identifier ID of the label contained in the signal, is transmitted to the microcontroller. The identifier ID can be the unique information exchanged between the label and the reader. This identifier is tested by the microcontroller to know if it is a valid identifier, that is to say an identifier that is present in the memory of the microcontroller and stored there during a configuration procedure for example. In the simplest case, the validity test is therefore simply to check if the identifier ID is in the memory MEM known identifiers of the microcontroller.

If the identifier is invalid, it goes back to step S17 in which the motor power is cut. Alternatively, we could go back to the first step S10.

In the case where the identifier is valid, it goes to a step S14 of testing the current state of the output of the microcontroller EN, that is to say the state of the motor power supply. If the output EN is already active, that is to say if the motor is already running, we go to step S10 without changing the state of the output EN.

If the output EN is not active, we go to a step S15 in which the states of the outputs DIR1 and DIR2 of the microcontroller are modified so as to reverse the direction of movement of the movable closing element with respect to the last displacement effected. . For example, the output DIR2 is activated if the output DIR1 was previously active. Then we go to a step S16 in which the output EN is activated so as to supply the motor. After this step, we go back to step S10.

Thus, if the door is initially in the closed position and a user approaches the reader his electronic badge comprising an electronic tag recognized by the microprocessor, the motor is activated in the direction of opening the door. On the other hand, the user is forced to keep his badge in the range of the door during the whole maneuver of the door. If he finds an anomaly, simply remove his badge out of range of the player to cut off the power motor and stop the movement of the door. The movement is automatically reversed during the next approach of the badge, which secures the operation. It has been found that a user accustomed to the operation of a door by means of a key switch becomes very quickly familiar with this type of "deadman" control. It is understood that the optimal range area is of the order of ten centimeters, as regards the connection between the antenna of the reader and the badge containing the electronic tag.

In an alternative embodiment of the method, it is possible to provide a specific processing step S18 in the case where the identifier is not valid so as to secure the access in the event of an attempted intrusion. In a first substep, when an invalid response signal is first received by the reader, a counter associated with this invalid response signal is initialized. In subsequent executions of step S 18, i.e., when the invalid tag is presented again to the reader, the counter associated with the invalid response signal is incremented. Then we test the value of the contents of the counter. If this content is not greater than a predetermined value (for example 2), proceed to step S17. On the other hand, if this content is greater than a predetermined value (for example 2), it triggers the execution of a particular action, for example the sending of a message to the user near the reader, the sending from an alarm message to a security station or the activation of alarm signals. One can possibly reset the counter after triggering the particular action.

One can also provide a variant within the scope of the skilled person in which the signal and / or the identifier are considered to be invalid according to a rule of majority. The process is capable of many variants. The direction reversal of the step S15 can for example be placed after the step S17 of deactivating the output EN, taking the precaution of making this inversion conditional so that it occurs only once. once the signal disappears, or as soon as it is no longer valid. The important thing is that the movement caused by a new appearance of a valid signal occurs in the opposite direction of the previous movement. Such a variant is shown schematically by the displacement of step S15 shown in dashed line in FIG.

According to the embodiments, the reversal of the direction of movement can be carried out by predetermining the state of the direction outputs DIR1 and DIR2 as shown in FIG. 1, but the inversion can equally well consist of changing state one. flip-flop or an internal memory of the microcontroller.

A variant of the device allows more to provide increased security at a lower cost. Indeed, it is possible that a CPL coupling element is mechanically moved in the installation so as to interfere with the communication between the reader and the electronic tag. As shown in FIG. 3, this coupling element may simply consist of a CIR resonant circuit comprising a coil L and a capacitor C and whose resonance frequency is equal to the frequency of the carrier of the signals emitted by the reader. When this CIR circuit appears in the range, its effect is to absorb the electromagnetic energy and thus to scramble the transmission between the reader and the label. As a result, no further movement of the movable closure member can be controlled by the ETG electronic tag input in the antenna range. It is therefore quite possible without contact electrical, to include in the device, means for executing a stopping order of the movable element.

The mechanical device comprising the coupling element is, for example, operated by a mechanical device DD for detecting a fall or for detecting the breakage of a compensation spring.

It should be noted that this interference mode of a coupling element does not necessarily apply in the vicinity of the antenna ANT. Indeed, the coupling can be performed also on an HFC connection cable between the antenna ANT and the reader TRD. This cable is normally shielded, but a zone thereof may be left free where the coupling element is intended to be positioned.

It is also possible to provide a main antenna for communication between the reader and the tag and, in parallel or in series according to the embodiments, a secondary antenna for coupling with the coupling element: the important one being in all the cases that this coupling, whatever it acts, disturbs the transmission of the radio signals between the reader and the label.

The coupling element may itself contain a resonant circuit comprising a coil L and a capacitor C and be movable relative to a fixed shielding or may comprise a movable shield with respect to a fixed resonant circuit. As represented in FIG. 4, it can also be envisaged that the mechanical device DD for detecting a fall or for detecting spring breakage of compensation, or for any mechanical anomaly, activates a switch closing the resonant circuit formed by the coil L and the capacitor C. The coupling element may still consist of a particular ETGP tag whose IDP identifier is known to the microcontroller. This ETGP tag may be brought within range of the reader by a mechanical device or, as shown in Figure 5, be removed from an MSH shield when an abnormality occurs. This tag sends following this action of the response signals to the reader. These signals are interpreted as orders to maintain the interruption of the motor supply.

Mobile shields covering electronic tags are in particular known from US Pat. No. 6,342,830.

Claims

Claims:

1. A method of controlling a motorized device (1) comprising a closure element (LDR) of a maneuverable access in two directions of movement by means of a motor (MOT), a reader (TRD) of electronic tags capable of periodically transmitting an interrogation signal and at least one electronic tag (ETG) capable of generating a response signal following the interrogation signal when it is in range of the reader, characterized in that it comprises an iteration of following steps: powering the motor (MOT) so as to move the closing element (LDR) as long as the reader (TRD) detects a valid response signal, cut off the power supply of the motor (MOT) in the absence of detection of a valid signal by the reader (TRD), the motor power failure step (MOT) comprising a substep of action on means (K1, K2) for reversing the direction of movement of the element (LDR) so that the next in displacement of the element (LDR) is done in the opposite direction to that of the last displacement of the element.

2. Control method according to claim 1, characterized in that the action on the reversing means (K1, K2) of the direction of displacement occurs at the end of the motor power failure phase (MOT) .

3. Control method according to claim 1, characterized in that the action on the reversing means (K1, K2) of the direction of displacement occurs at the beginning of the phase of power failure of the motor (MOT).

4. Control method according to one of the preceding claims, characterized in that the detection of a valid response signal by the reader (TRD) triggers a delay during which the transmission frequency of the interrogation signals is increased.

5. Motorized device (1) comprising a closure element (LDR) of a two-way access via a motor (MOT), a reader (TRD) of electronic tags capable of periodically transmitting an interrogation signal and at least one electronic tag (ETG) capable of generating a response signal following the interrogation signal when it is in range of the reader (TRD), characterized in that it comprises means (MCU, MEM) of implementation of the method according to one of the preceding claims.

Motorized device (1) according to claim 5, characterized in that it comprises a coupling element (CIR) and a movable shield (MSH) with respect to the coupling element (CIR) between a first position in which the coupling element (CIR) scrambles the communications between the reader (TRD) and the tags (ETG) and a second position in which the coupling element (CIR) does not interfere with the communications between the reader (TRD) and the labels (ETG).

Motorized device (1) according to claim 6, characterized in that the relative movement of the shield and the coupling element (CIR) is caused by a mechanical device (DD) connected to the closure element (LDR). .

8. Motorized device (1) according to claim 5, characterized in that it comprises a particular label (ETGP) and a shielding mobile (MSH) relative to the particular tag (ETGP) between a first position in which the tag (ETGP) can not generate a response signal and a second position in which the tag (ETGP) can generate signals response to the reader.

9. Motorized device (1) according to claim 8, characterized in that the relative movement of the shield and the particular label is caused by a mechanical device (DD) connected to the closure element (LDR).

10. Motorized device (1) according to claim 5, characterized in that it comprises a resonant circuit (CIR) comprising a coil (L) and a capacitor (C) and whose resonance frequency is equal to the frequency of the carrier of the interrogation signals emitted by the reader (TRD), and whose activation scrambles the communications between the reader and the labels.

11. Motorized device (1) according to claim 10 characterized in that the activation of the resonant circuit is caused by a mechanical device (DD) connected to the closure element (LDR).