FR2580715A1 - DEVICE FOR ENCODING AN ELECTROMECHANICAL DEVICE OF MANUFACTURING CONTROLLED BY A CODE - Google Patents

Abstract

The invention relates to an electromechanical operating device controlled by a code modifiable remotely and intended for controlling an access-monitoring appliance. The electromechanical device comprises a control unit arranged in the vicinity of the appliance to be controlled and possessing a code input interface (1, 2) connected to a comparator (3), itself connected to a memory (4) containing an actuating code and controlling an electrical actuating device (5), and a coding unit comprising a remote-coding device and connected to the control unit. The control unit also possesses a selector device (12, 15) controlled by the coding unit and transmitting selectively to the memory (4) a code supplied by the input interface (1, 2) or transmitted by the coding unit. The invention is used particularly for controlling the doors of hotel rooms or any other premises, of which the accesses to be protected must or can be monitored by means of a code which has to be modified frequently for security reasons.

Description

Encoding device for an electromechanical device

is controlled by a code ".

  The present invention relates to electronic devices

  switching devices whose operation is obtained by means of a code and which are intended to control a device controlling a

  access, such as an electric door lock or an opening motor.

  door to allow access only to authorized persons who know the code. Generally, these electronic maneuvering devices comprise on the one hand a control unit arranged in the vicinity of the apparatus to be controlled and which comprises an electronic device which verifies the code supplied by the users and supplies, in the event of correct code, a control signal. the electrical device for actuating the apparatus and, secondly, a monitoring unit arranged at a distance

  and which allows to control and / or control said access.

  Such devices are constituted for example by code-controlled locks which are intended in particular for controlling the opening of the rooms of a hotel or a motel and comprise a coding unit which is arranged at a distance from the room. door to be ordered, for example at the hotel office, which includes a remote coding device, connected to the control unit. Such an electric strike is described in particular in French Patent 2,224,629; the remote coding device makes it possible to change at will the opening code of each door from the hotel desk. This requires that each customer comes to code the door of his room at the office of the hotel, which is a constraint, especially in the case of motel; moreover, the

  The client is often obliged to dial his code in the presence of

  hotel staff and he is not sure that his code is really

confidential.

  The subject of the invention is therefore a control device

  electromechanical controlled by a code that can be modified

  of the above type which allows on-the-spot coding by the user

  sateur. Therefore, in the case of a hotel, the customer can dial his room code opening only he will know

  For the duration of his stay, the hotel staff can

  before handing over his own code-at the end of the client's stay.

L 2580715

  The device éiectc: ca: lk. The maneuver according to the invention is particularly remarkable in that the preconditioner unit further comprises a selector device controlled by the remote coding unit and which selectively transmits to the memory a code supplied by the remote control unit. input interface or sent by the coding unit. Advantageously, the control unit comprises a multiplexer receiving, on the one hand, the output of the input interface, and, on the other hand, the code sent by the coding unit, the output of the multiplexer being sent on the input. of writing the memory and said multiplexer being controlled from

the remote coding unit.

  According to another characteristic of the invention, the control unit comprises an OR logic circuit receiving on the one hand a signal indicating the supply of a digit of

  code by the input interface, and on the other hand, an order of co-

  remote control and whose output is connected to the commu-

writing memory.

  According to yet another feature of the invention

  the central unit comprises a device for counting the code digits provided by the input interface, the output of said counter being connected to a digit number limiter!

  code which commands the reset of said counter

  input fres for a predetermined number of code digits

  provided by said interface. The output of said limiter is

  linked on the one hand to an input code counter, and on the other hand to a delay circuit and the control unit comprises an AND logic circuit receiving on the one hand the output of said delay circuit and, d another, a signal

  corresponding to a predetermined number of codes, the output of

  said AND logic circuit providing a false code alarm.

  Other features and advantages of the invention

  will be apparent from the following description of an example of

  embodiment and accompanying drawings in which: - FIG. 1 shows in the form of a syptic diagram an electric strike lock according to the present invention and,

  FIG. 2 represents a detail of the diagram of FIG.

  FIG. 1 shows the control unit of the electric lock which comprises an input interface consisting of a reader, such as a keyboard, an optical, magnetic or infrared code reader followed by a binary coder.

  whose output is sent to one of the inputs of a comparator

  3 which receives on its other input the contents of a memory 4, the output of the comparator 3 controls via a comparison logic which will be described later, the device

  electric 5 opening of the electric g & che.

  The lock with electric lock also comprises a coding unit disposed remotely and which sends on the one hand on the line 6 a remote coding order and on the other hand on the line 7 of the coding pulses; these two lines are connected

  to the inputports of an AND logic circuit 8 which sets a clock on

  box 9 followed by a counter 11 whose contents are sent to

  the write input port of the memory 4.

  According to the invention, the control unit comprises a selector controlled by the coding unit and which makes it possible to send selectively to the memory 4, or the code supplied by the coder 2 connected to the output of the interface

  1, the code provided by the counter 11. This device selects

  essentially comprises a multiplexer 12 controlled from

  then the coding unit via a line 13 and which receives on the one hand the output of the encoder 2, and on the other hand the output of the counter 11, the output of the multiplexer 12 being sent to the port of 4. A logic input OR 14 receives on the one hand a signal corresponding to a remote coding, namely the output of the logic circuit 8 and, on the other hand, a signal corresponding to a coding on the keyboard 1, said signal being provided by the encoder 2; the output of this OR logic circuit 14 is sent to the port of

  memory write command 4.

  The output of the logic circuit 8 is also sent to a counter of the number of input slots 10 whose output is sent to a multiplexer 15. An entered digit counter 16 is connected to the output of the encoder 2; the

  output of this counter is sent on the one hand to a

  number of digits of the code 17, and secondly to the second input of the multiplexer 15. The reset of the 4.

  counter 16 is controlled by the limiter 17.

  The comparison logic mentioned above which is controlled by the comparator 3 is constituted by a counter of the correct number of digits 18 followed by a demodulator 19 of the number of correct digits to the number of digit limiter 17. The output of the comparator 19 control the electric strike itself by means of an OR logic circuit 20 which can moreover receive an opening control command from coding unit by a line 21. In this case, the line signal 21 can be an AND function between a validation of the codag unit

  and a signal from a switch or push button

  conch attached near the keyboard. This function of "entry li-

  bre "allows to operate the electromechanism 5 without

  be obliged to provide a code to the comparator 3.

  Keyboard 1 includes a reset key

  R which actuates, on the one hand, a delayed switch 22 of the illuminator

  23 of the keyboard, and secondly, the reset of the counter 16 of the number of digits entered and the counter 18 of the number of

correct figures.

  FIG. 2 represents an embodiment of the

  limiting circuit of the number of digits such as circuit 17.

  In this figure, we see the counter 16 of the number of input digits which include the output port corresponding to the four

  binary coding bits which are sent on the multiplexer 15.

  To limit the number of input digits, two of these outputs of the counter 16 are sent to an AND logic circuit 34 or one of them to the two inputs of the AND circuit 34, and the output of this AND circuit 34 being sent to the reset port of the counter 16 via a second AND logic circuit 35 further receiving the reset circuit from the operation of the reset key of the keypad 1 or An equivalent signal of any code reader, in the example shown, these AND circuits are in fact NAND circuits. On circuit 34, you can limit the number of digits entered

  any binary number comprising one or two bits equal to 1, that is,

  to decimal numbers 1,2,3,4,5,6,8,9,10,12 and 16.

  According to a characteristic of the invention, there is provided a device for generating a "false codes" alarm when a predetermined number of erroneous codes are coxosed on the keyboard 1. This device understands a teosisatia

  24 and an input code counter; triggering the temporality

  24 is controlled by the code number limiter circuit 17 whose output pulses are counted by the counter 25. The output of the timer 24 and the input code counter 25 are sent to a door

  ET 26 whose output is the signal of false codes.

  Counter 25 of false codes is reset at the end of the signal

  time delay provided by timer 24; the time

  porisation 24 is inhibited by the opening command signal

  the electric strike provided by the OR logic gate 20.

  The operation of the electric lock

  which has just been described is the following.

  Users who know the opening code first hit the R key on keyboard 1, this

  which results in the illumination of the indicator light 23 of the keyboard.

  Pressing this key R also resets the

  16 number of numbers entered, this allowing the system to be initialized, and the counter 18 of the correct number of digits. Each time the user hits one of the numbers of the code on the keyboard 1, this figure is put in form

  binary in encoder 2 and comparator 3 makes the comparison between

  this number and that provided by memory 4. At each

  When there is coincidence between these two figures, the comparison

  driver 3 controls counter 18; when the number of digits

  correctness calculated by counter 18 corresponds to the name

  displayed in the limiter 19, that is to say the number of digits of the code, this limiter circuit controls the power supply

  of the electric strike 5 via the OR gate 20.

  If the two digits sent to the comparator 3 are not equal, the output of the comparator commands the reset of the counter 18 with correct digits, for example by means of an inverting gate 27. It can be seen that the OR gate 20 delivers validation signal that if we have composed successively all

  the numbers of the code in a predetermined order.

  The remote modification of the code contained in the memory 4 is effected by sending a continuous command order remotely on the line 6 while slots of variable width are sent on the line 7. The coincidence of these

  slots with the order of remote coding command, by the in-

_580715 6.

  through the AND gate 8, the sending of pulses provided by the clock 9 to the counter 11 which counts these pulses and transmits the corresponding digit to the multiplexer 12, the signal

  The remote encoding provided by line 13 commands the multi-

  plexeur so that the latter writes the aforementioned number in

memory 4.

  The slot counter 10 counts the slots sent by the line 7, i.e. the coding digits sent the output of this counter is sent to the multiplexer 15 and the remote coding command provided by the line 13 acts. the multiplexer 15 so that the latter modifies the address of the memory 4 according to the number of slots counted by the

counter 10.

  When it is desired to perform the coding of the memory 4 by the keyboard 1, which allows the user to save the code of his choice without having to move to the remote coding station, a corresponding signal is sent on the

  internal coding control line 13, which places the multiple

  tiplexers 12 and 15 in the state where they pass to the

  memory 4 respectively the binary digit provided by the co-

  2 and the number of digits entered provided by the counter 16. The process of loading the memory 4 and its addressing

  occur in a similar way to the open coding process

  tance. In both cases, the memory write is controlled by the OR logic circuit 14 which receives either the pulse supplied by the logic gate 8 and corresponding to the coding slot sent by the line 7, or the signal supplied by the coder 2.

  and indicating the sending of a number by the keyboard 1.

  It can be seen that the invention makes it possible to record

  very much an opening code in the memory 4 indifferently

  from keyboard 1 or from the coding unit

  from lines 6, 7, 13 and 21. The remote or local coding is each time performed under

  control of the coding unit which sends the corresponding orders.

dent.

7 2580715

  According to another important feature of the

  vention, an alarm signal is generated for false codes,

  that a number of false codes are composed on the

  for a pre-determined period. This is achieved in the following manner; each time the limit circuit of the number of entered digits 17 records a number of

  numbers entered equal to the number of digits of the code, not only

  It then resets the counter 16 of digits entered but it controls the delay circuit 24 so as to start a delay equal to, for example, 30 seconds. This limiter circuit 17 also sends a pulse to the entered code counter 25 which supplies a signal to the AND logic circuit.

  26 when it counted a predetermined number of codes entered.

  For example, one of the input ports of the AND circuit 26 may be connected to the output of the counter 25 corresponding to the highest-order bit, namely 8; in this case, each time the counter 25 has eight input codes, it sends a signal on the AND circuit 26. The latter AND circuit also receives the delayed signal provided by the timer 24 so that if this predetermined number of codes has been performed during the duration of the delayed signal, there is obtained at the output of the AND circuit 26 a false code alarm signal which can then be stored and sent to the remote coding unit. This alarm is preferably performed in a discrete manner so that the personnel present at the remote coding unit

  only warned of these attempts to open the door.

  To prevent the transmission of a false code signal when

  Authorized user dials the correct code just after a person has tried to force the lock by trying several codes, the open signal provided by the OR circuit 20 inhibits the timed signal of timing circuit 24; this circuit also makes it possible to reset the fake code alarm signal generating device after the door has been opened by an authorized person. At the end of the delayed signal, the counter 25 is reset by the

timing circuit 24.

  8. According to another possibility of the invention, it is expected that the detection of a false code causes the blocking of the input member that is to say the keyboard in this case, for a specified period; this period can be doubled each time a new false code is detected. Thus, for example, it can be expected that after entering a false code, the keyboard is locked for 10 seconds and then for 20 seconds after a second false code, and then for 40 seconds as a result of a

  third fake code and so on. As a result, the time required

  necessary to try a large number of code by an unauthorized person increases very rapidly and virtually eliminates the possibility of attempting to

randomly obtain the actual code.

  We also see that we can thus obtain an alarme

  discreet if there is an attempt to cheat the

  ture (shock or tear, on the keyboard or door).

  The above description of an example embodiment

  has been provided for illustrative and non-limiting purposes and it is obvious that it can be modified or

  variants without departing from the scope of the present invention.

  tion. In particular, the components of the diagram of FIG.

  may be replaced by components performing the same function

  In particular, the keyboard 1 can be replaced by any type of device capable of generating a code (optical code reader, magnetic bar, infra-red, hyper-frequency, ...). It should be noted that all the alarm signals to be transmitted to the coding unit are positive safety, the normal logic at idle, with no alarm being one. As a result, any break in the transmission cable leads to alarm, Among the various alarm signals, one can predict the alarm recognition due to a forced entry as well as that due to an attempt to open the door by setting aside

  external voltage of the electromechanism.

  The memory 4 described is of the parallel input type, but it is obvious that a non-volatile random access memory can be used so as to preserve the code in the event of suppression of the supply voltage, otherwise it would be impossible to get the opening. In this case, it is a memory

  serial input and not parallel.

Claims (6)

REVENDICATIQNS   1) Electromechanical device for maneuvering   by a remotely modifiable code for executing an access control apparatus having a control unit disposed adjacent to the apparatus to be controlled and   taking a code input interface (1,2) connected to a com-   paratridge (3) also connected to a memory (4) containing an actuation code and controlling an electrical device   actuating device (5) and a coding unit comprising a device   remote control unit and connected to said control unit characterized in that the control unit further comprises a selector device (12,15) controlled by the coding unit selectively transmitting to the memory (4) a code provided by the input interface (1,2) or sent by the unit coding.   2) Electromechanical operating device according to claim 1, characterized in that the control unit comprises a multiplexer (12) receiving on the one hand the output of the input interface (1, 2) and, on the other hand, on the other hand, the code sent by the coding unit, the output of said multiplexer (12) being sent to the write input of the memory (4) (line 13),) Electromechanical maneuvering device according to   any one of claims 1 or 2, characterized in that   that the control unit comprises an OR logic circuit (14) receiving on the one hand a signal indicating the supply of a code code via the interface (1, 2) and, on the other hand, an order of remote control, the output of said OR logic circuit (14) being   connected to the memory write control port (4).   4) Electromechanical device according to any one   claims 1 to 3, characterized in that the unit of   control comprises a counting device (16) of the code numbers provided by the input interface (1,2), the output of said counting device (16) being connected to a limiting circuit   (17) the number of digits of the code that resets the said   positive counting of input digits (16) for a number 11.   predetermined code numbers provided by the interface (1,2).    An electromechanical device according to claim 4, characterized in that the output of the limiter circuit (17) is connected on the one hand to a delay circuit (24) and on the other hand to an input code counter (25). and in that the control unit further comprises an AND logic circuit (26) receiving the outputs of the counter (25) and the delayed signal provided by the timer (24) so as to output a false code alarm signal when a predetermined number of false codes has been dialed on the interface (1,2) during a corresponding period   at the timing of the delay circuit (24).   6) Electromechanical device according to claim 5, characterized in that the delay circuit (24) carries out   the reset of the entered code counter (25) during the dis-   timing of the delayed signal provided by the circuit (24).   7) Electromechanical device according to any one   Claims 1 to 6, characterized in that the comparator   comprises a digit by digit comparator (3), a correct code digit counter (18) and a comparator (19) with a predetermined number corresponding to the number of digits of the opening code. 8) Electromechanical device according to any one   Claims 1 to 7, characterized in that the interface (1,2)   includes a reset device (R) which controls a keypad indicator light (23) and reset of the different   counters (16,18) of the control unit.   9) Electromechanical device according to any one   Claims 1 to 8, characterized in that it comprises   a false code detection device which blocks the input interface for a certain period following the composition of a false code, this period being doubled each time during   of the composition of a new false code.