EP0037566B1 - Système d'identification par exemple d'une personne en vue de la commande d'un appareil électrique, d'un appareil mécanique ou de tout autre appareil - Google Patents

Système d'identification par exemple d'une personne en vue de la commande d'un appareil électrique, d'un appareil mécanique ou de tout autre appareil Download PDF

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Publication number
EP0037566B1
EP0037566B1 EP81102532A EP81102532A EP0037566B1 EP 0037566 B1 EP0037566 B1 EP 0037566B1 EP 81102532 A EP81102532 A EP 81102532A EP 81102532 A EP81102532 A EP 81102532A EP 0037566 B1 EP0037566 B1 EP 0037566B1
Authority
EP
European Patent Office
Prior art keywords
shift register
circuit
identification system
moving part
flip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP81102532A
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German (de)
English (en)
French (fr)
Other versions
EP0037566A3 (en
EP0037566A2 (fr
Inventor
Alain Marie-Louis Molé
Jean-Louis Paul Jules Savoyet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mole Alain Marie-Louis
Savoyet Jean-Louis Paul Jules
Original Assignee
Individual
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Publication date
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Priority to AT81102532T priority Critical patent/ATE10040T1/de
Publication of EP0037566A2 publication Critical patent/EP0037566A2/fr
Publication of EP0037566A3 publication Critical patent/EP0037566A3/fr
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Publication of EP0037566B1 publication Critical patent/EP0037566B1/fr
Expired legal-status Critical Current

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    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00182—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with unidirectional data transmission between data carrier and locks
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C2009/00753—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys
    • G07C2009/00761—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by active electrical keys with data transmission performed by connected means, e.g. mechanical contacts, plugs, connectors

Definitions

  • the present invention relates to an identification system, for example of a person for the control of an electrical, mechanical or other device.
  • People identification or recognition systems have many applications. They are used in particular for opening doors, managing schedules, managing devices used by several people such as photocopying machines or even in systems for distributing banknotes by credit cards.
  • a removable part which includes an identification code and which is in the form of a badge in the form of a credit card which the person to be identified carries with it (see by example U.S. Patent 3,637,994).
  • the identification code is materialized in the badge either by perforations or by a magnetic strip.
  • the use of such badges has many drawbacks. They are indeed relatively bulky and can deteriorate easily. In the case of punched badges, the code is relatively easy to recognize.
  • the carrier of the identification code is magnetic, the magnetic tape can be damaged by scratches or under the influence of magnets.
  • the device used for reading badges of this type is necessarily complex and must in particular include a mechanical drive system enabling the badge to be moved in order to read the identification code. As a result, the reading devices have a high production cost.
  • a removable part is used in the form of an electronic key similar to a conventional key but comprising means for memorizing an identification code which can be detected and recognized by a system.
  • reading device similar to a lock but comprising a set of electronic circuits (see for example the American patent 4038 637).
  • a programmable memory key system in which the identification code can be contained in a shift register housed in the electronic key.
  • the information contained in the key can be read by the electronic lock by means of pulses supplied by a clock located in said lock.
  • the information thus obtained is compared with a code stored in the lock so as to determine the identity of the two codes and the command, for example, of the opening of a keeper or of any other desired operation.
  • the object of the present invention is therefore to provide an identification system which does not have the drawbacks of the identification systems currently used and known and in which the mobile part analogous to a key is inert so that the simple reading of the shift register contained in the key does not allow simple identification of the identification code.
  • the identification system for example of a person, for the control of an electrical device, a mechanical device or any other device, comprises a movable part analogous to an electronic key comprising an electronic code of identification recorded in at least one memory zone of the preprogrammed passive type and comprising at least one parallel / serial shift register.
  • the system further comprises a fixed part similar to an electronic lock, capable of being coupled with the mobile part and comprising means for supplying electric current, electronic means for reading, recognizing and interpreting the content of the register to shift of the mobile part and comparison means with a code preprogrammed in said fixed part.
  • the electronic means of the fixed part also comprise a pulse generator circuit supplying a pulse capable of causing the loading of the electronic identification code memorized initially in the mobile part up to the shift register of said movable part.
  • the shift register of the mobile part does not initially contain any information, the identification code being stored in a memory area of the mobile part distinct from the shift register.
  • the loading pulse which acts on the mobile part so as to pass the code contained in the memory area into the shift register.
  • the memory area of the mobile part preferably comprises a plurality of switches which can be produced for example in the form of fuses or by destroyable connections and the position of which determines the electronic identification code.
  • Each flip-flop of the shift register of the mobile part is associated with one of the switches whose position controls its state by means of two NAND gates receiving the loading pulse on one of their inputs.
  • the first of the aforementioned NON AND gates is connected by its other input to the switch with which it is associated.
  • the second NAND gate receives the output of the first gate on its other input.
  • each flip-flop of the shift register is placed in a state corresponding to that of the switch with which it is associated. It follows that the identification code initially represented by the position of the plurality of switches is registered in the various flip-flops of the shift register under the action of the above-mentioned loading pulse.
  • the means for generating the loading pulse included in the fixed part or electronic lock comprise a loading circuit provided with a double flip-flop of the master-slave type associated with a NAND gate and receiving the clock pulses.
  • the electronic means included in the fixed part for reading the content of the shift register of the mobile part include a reading circuit provided with a double flip-flop of the master-slave type associated with a NAND gate receiving the pulses from the above clock connected to the output of the charging circuit.
  • the reading circuit provides successive pulses allowing the reading in series of the information contained in the shift register of the mobile part after this register has been loaded with the identification code by the action of the pulse of loading.
  • a read stop circuit makes it possible to limit the number of clock pulses to the exact number of bits of the identification code contained in the shift register of the mobile part.
  • This read stop circuit includes a pulse counter receiving the read pulses from the read circuit and a monostable capable of delivering a read stop pulse when the number of pulses counted corresponds to the number of bits in the register. with shift, that is to say when the content of the shift register of the mobile part has been read once.
  • the system can also comprise, in the fixed part, a circuit for authorizing successive tests.
  • This circuit comprises a succession of flip-flops, the resetting of which depends on the positive result of the comparison made by the comparison means with the code preprogrammed in the fixed part. In this way, a number of unsuccessful attempts is therefore authorized equal to the number of flip-flops in this succession of flip-flops before triggering an alarm.
  • Suitable timing means can also be provided to reset all of the system's rockers to zero when the key is inserted and after uncoupling.
  • the fixed part also comprises writing means for modifying the state of a determined portion of the memory area of the mobile part.
  • writing means for modifying the state of a determined portion of the memory area of the mobile part.
  • the writing means of the fixed part comprise a parallel / serial shift register receiving driving pulses synchronized with the reading pulses of the shift register of the moving part.
  • the modifiable portion of the memory area of the mobile part includes. preferably a plurality of fuses that can be destroyed sequentially or randomly, in place of the aforementioned switches whose position is invariable.
  • the mobile part can include a second serial / parallel shift register receiving the serial signal from the shift register of the writing means. This signal causes certain selected fuses to blow sequentially or randomly so that the current flowing through them causes them to break.
  • the fixed part of the system of the invention comprises means for supplying a signal for controlling the breaking of fuses after the write stop.
  • This signal is transmitted to a set of AND gates receiving at their other input the output of each of the flip-flops of the second serial / parallel shift register of the mobile part.
  • the output of each AND gate is connected to one of the terminals of a fuse.
  • the writing means are associated with a loading circuit and a reading circuit supplying a parallel / series shift register with driving pulses the number of which is determined by means of stopping the freelance writing.
  • the identification system for example of a person for the control of an electrical device, a mechanical device or any other device identified by the general reference 1, comprises a removable part transportable by said person and referenced 2.
  • said removable part is presented as a key. It can advantageously consist of a glass fiber wafer sandwiched by two thicknesses of hard plastic resistant well to solvents and to extreme temperatures.
  • the electronic key is in these conditions very resistant and its wear negligible in particular compared to that of a badge of conventional type.
  • the electronic key has six or seven electrical contacts depending on the system variants. These contacts can be made mechanically and consist of conductive elements embedded in the plastic material cooperating on the side of the fixed part playing the role of electronic lock with steel balls held by springs.
  • the removable part or key 2 includes a memory assembly 3 of the preprogrammed passive type containing an electronic identification code corresponding to the person or to any other data capable of enabling the command, for example to open a door release.
  • the identification system further comprises a fixed part designated by the general reference 4 playing the role of electronic lock and comprising electronic means 5 capable of recognizing the electronic code found in the key and of interpreting it in order to carry out the device control 1.
  • the set of memories 3 is removably coupled to said electronic means 5 by connections 6 made by contacts as has just been said.
  • the fixed part 4 playing the role of lock further comprises supply means in the form of a battery 7 which supplies the set of memories 3 and the electronic means 5 only when the key 2 is coupled with the lock 4 .
  • the supply voltage is preferably very low of the order of +5 volts, the demand current remaining limited to a few milliamps so as to avoid any danger for the user.
  • the supply is made by a connection 8 provided in the fixed part 4 and the mobile part 2, the supply circuit being shown in FIG. 1 dotted line.
  • FIG. 2 system which is intended for controlling a door strike.
  • the electronic key 2 shown schematically and comprising a parallel / series shift register 9 controlled by a succession of sixteen switches 10 whose open or closed position defines one of the bits of the identification code.
  • the switches 10 can for example be constituted by connections, part of which was initially destroyed so as to cut the electrical connection between the two terminals.
  • the key 2 has seven terminals intended to come into contact with corresponding terminals of the electronic lock when the key is coupled with the latter.
  • the terminals T referenced 11 and 12 connected together in the key 2 are intended to be connected to the ground of the system.
  • the terminal L referenced 13 is intended to receive a pulse for loading the code contained in the set of switches 10 into the register 9.
  • the terminal H referenced 14 is intended to receive a succession of pulses allowing the reading of the information contained in the shift register 9.
  • the terminals A referenced 15 and 16 interconnected in the key 2 are intended to be connected to the power supply located in the lock.
  • the output terminal S referenced 17 is connected to the output Q of the shift register 9.
  • the electronic key 2 is passive and does not include a power source. As long as it is not coupled to the lock, the shift register 9 does not include any information and its reading therefore cannot provide the identification code.
  • the fixed part or electronic lock also includes seven terminals identified by the same letters T, L, H, A and S arranged so as to be able to come into contact with the corresponding terminals of the key when the latter is coupled to the lock.
  • the electronic lock comprises a charging circuit referenced 18 as a whole, the input of which is connected to terminal 12 when the key is coupled with the lock, that is to say with the earth of the system and the output of which provides a charging pulse on terminal L.
  • the output of the charging circuit 18 is also connected by the connection 19 to the input of a reading circuit referenced 20 as a whole and supplying on terminal H a succession of pulses emitted by a clock circuit 21.
  • the output of the read circuit 20 is further connected by the connection 22 to the input of a read stop circuit referenced 23 as a whole, the output of which returns via the connection 24 to the read circuit 20 in order to deliver a read stop pulse stopping the emission of the clock pulses on the terminal H when the content of the shift register 9 has been read once, that is to say when a total number of sixteen pulses have appeared on the terminal H, this number being equal to the number of bits of register 9.
  • the terminal S connected to the output Q of the shift register 9 receives the serial signal representing the information contained in the shift register 9.
  • the terminal S is connected to the input of a circuit 25 performing a serial / parallel conversion and a comparison of the information read from the key 2 with an identification code preprogrammed in the electronic lock itself and constituted in the example illustrated in the form of a set of switches 26 having the same state as the 10 key switches.
  • the electronic lock further comprises in the example illustrated a circuit for authorizing successive tests 27 connected by an output connection 28 to an alarm device which is actuated after four successive unsuccessful tests.
  • a circuit 29 connected to the terminals A of the key 2 stabilizes the supply at +5 volts.
  • a first reset circuit 30 causes all of the flip-flops of the electronic key system to be reset to zero when the key is coupled with the lock.
  • a second reset circuit 31 causes all of the flip-flops to be reset to zero and the supply cut off when the key is uncoupled.
  • a strike control circuit 32 receives a signal when the comparison made in circuit 25 is positive.
  • the loading circuit 18 comprises a double master-slave rocker constituted by a first rocker 33 or "master” and a second rocker 34 "slave".
  • the two flip-flops 33, 34 are connected to each other in a conventional manner, the second flip-flop 34 receiving on its input T the clock signal coming from the clock circuit 21.
  • the output Q of flip-flop 34 is connected to one of the NAND gate 35 inputs further receiving on its second input the clock signal.
  • the output of the door 35 connected to the terminal L of the lock is also connected to the forcing input R of the first flip-flop 33 so as to reset the latter to zero as soon as an output signal is emitted. Under these conditions, it can be seen that the loading circuit 18 supplies a single pulse called the loading pulse on the terminal L.
  • the input T of the first flip-flop 33 is connected via the two timers 36 and 37 to the ground of the system via the terminal t when the key 2 is coupled to the lock. Under these conditions, the system therefore operates in negative logic.
  • the read circuit 20 is of the same type as the loading circuit 18 and it includes, like the latter, a double master-slave flip-flop 38, 39 mounted in the same way.
  • the input T of the first flip-flop 38 receives, via the inverter 40, the output pulse from the NAND gate 35 of the loading circuit 18.
  • the output of the NAND gate 41 is connected by the connection 22 to the read stop circuit 23 which includes a counter by sixteen 42 whose output O D is connected to the input ⁇ of a monostable 43.
  • the output pulses of the NON-ET41 gate or clock pulses appearing on the terminal H transmitted by the connection 22 via the inverter 44 to the input HA of the counter 42 are counted until reaching the number of sixteen corresponding in the example illustrated to the number of bits of the shift register 9 of the key 2, that is to say to the number of switches 10.
  • the output Q of the monostable 43 delivers a signal of output applied by the connection 24 to the forcing input R of the first flip-flop 38 of the reading circuit 20 resetting the latter to zero and thereby stopping the clock pulses emitted by the circuit 20.
  • the pulses d the clock are also applied by the connection 47 to the inputs H of the two registers 45 and 46.
  • the comparison code preprogrammed in the fixed part or lock, materialized by the position of the sixteen switches 26, is compared with the result of the serial conversion / parallel in the comparison circuit comprising the four comparators 47, 48, 49 and 50 connected in series and connected on the one hand to the different parallel outputs of the two conve registers rsion 45 and 46 and on the other hand to the different switches 26 grouped by four for each of the comparators 47 to 50.
  • the result of the comparison from the last element 50 is a “zero” or “one” signal depending on whether the comparison is negative or positive.
  • the result of this comparison appearing on the connection 51 is applied to the input D of the flip-flop 52 receiving further on its input T by the connection 53 the output signal of the read stop circuit 23.
  • a signal is emitted by the output Q of the flip-flop 52 and transmitted by the connection 54 via the amplifier 55 to the relay 56 closing the switch 57 of the door release control circuit 32.
  • the output Q of the flip-flop 52 is connected by the connection 58 to the gate NI (NOR) 59 whose output is connected to the reset reset inputs R of the three flip-flops 60, 61 and 62 of the circuit d authorization for successive tests 27 connected in cascade and connected to the alarm control 28.
  • the input T of the first flip-flop 60 is connected to the output Q of the time delay monostable 63 receiving at its input A the output signal of the read stop circuit 23.
  • the power supply stabilization circuit 29 comprises an input terminal 64 connected to the supply battery, for example +5 volts contained in the electronic lock but not shown in the figure.
  • the two terminals A intended to cooperate with the terminals 15 and 16 of the key 2 are connected via the capacitor 65 and the diode 66.
  • the electronic key further comprises in the first reset circuit 30 a monostable 70 receiving on its input ⁇ by connection 71 the output signal of the timer 36. Under these conditions, the monostable 70 reacts to a signal having a falling edge on the connection 71, that is to say when the key 2 is coupled.
  • the output Q of the flip-flop 70 is connected by the link 72 to one of the inputs of the NI (NOR) gate 73.
  • the output signal from the NI gate 73 allows the counter 42 to be reset to zero via the NAND gate 74 and its output connection 75, said gate 74 receiving on its second input by connection 76 the signal of the read stop circuit 23.
  • the output of the NI gate 73 allows by the connections 76a, 77, 78 and 79 to reset to zero by the forcing inputs R the two registers 45 and 46 of the series / parallel conversion circuit 25.
  • the circuit 31 for resetting to zero at the end of reading when the key is removed comprises two monostables 80 and 81 mounted in cascade of output Q of the monostable 80 being connected to the input ⁇ of the monostable 81.
  • the first monostable 80 receives on its input B by connection 82 the output signal of timer 37 and reacts taking into account this assembly on a signal having a rising edge on connection 82 that is to say during the uncoupling of the key.
  • the output Q of the second monostable 81 which provides a very short pulse is connected by the connection 83 to the second input of the NI gate 73 which causes, as we have seen previously, the resetting of the counter 42 and of the conversion circuit serial / parallel 25.
  • the Q output of the monostable 81 is also connected by the connection 84 to one of the inputs of the NI gate 59 so as to reset the flip-flops 60, 61 and 62 of the test authorization circuit successive 27 when the key is uncoupled.
  • the rising edge signal on the connection 82 to the kind of timer 37 applied via the inverter 85 to the input T of the flip-flop 86 causes, via the amplifier 87 connected to its output Q, triggering of the relay 68 of the supply circuit 29 so that the supply is cut off.
  • the flip-flop 86 is reset to zero by its input R via the connection 76a connected to the output of the NI door 73 when the key is uncoupled from the lock.
  • the NAND gate 88 receives on its two inputs respectively the output signal from the NI gate 73 via the connection 79 and the output signal from the inverter 85 via the connection 89.
  • the output signal from the NAND gate 88 allows the flip-flop 52 to be reset to zero by its input R by means of connection 90 and the reverser 91 when the key is uncoupled after expiration. of the delay time of the timer 37.
  • Fig. 3 illustrates as a function of time the signals appearing at various points in the diagram of FIG. 2. These different diagrams are referenced A to K in alphabetical order.
  • the output of the second timer 37 delivers a falling edge signal (curve E) at time t 2 which causes the emission by the charging circuit 18 of a negative charging pulse visible on the curve F.
  • This loading pulse causes the emission of a succession of sixteen negative clock pulses on terminal H at the output of the read circuit 20 as shown in diagram G.
  • the serial signal appearing on the output terminal S of the register with offset 9 is represented by the diagram H. It comprises a certain number of positive pulses corresponding to the open switches 10.
  • comparator 50 The output of comparator 50 is shown in diagram 1 with a rising edge at time t 3 if the comparison is positive.
  • the negative pulse provided by flip-flop 52 is visible on diagram J and the supply of the strike is represented by diagram K in the form of a falling edge signal.
  • FIG. 4 The detailed structure of the shift register 9 of the key and of the set of switches 10 playing the role of preprogrammed memory is partially illustrated in FIG. 4.
  • the switch 10a is open which, in the negative logic chosen by way of example for the circuit of FIG. 2, corresponds to a “one” signal.
  • the switch 10b connected to ground is closed, which corresponds to a “zero” signal.
  • the other switches have not been shown in FIG. 4.
  • This figure also shows the first two flip-flops 92a and 92b corresponding to the first two bits of the shift register 9 and which receive on their inputs H the clock signals coming from the reading circuit 20 of the lock via the connection 94 connected to terminal H.
  • the different flip-flops 92a, 92b, etc. are connected together in cascade in a conventional manner, the outputs Q and Q of each upstream flip-flop being connected to the inputs S and R of the immediately next flip-flop so as to produce the shift register 9.
  • Two NAND gates 95a and 96a are associated with the flip-flop 92a, the outputs of the two NAND gates being connected respectively to the input P placing the flip-flop 92a in the "one" state and to the input R placing the flip-flop 92a in the "zero" state.
  • the first NAND gate 95a is connected by its first input via the connection 97a to the switch 10a and by its second input via the connection 98a at the output of the inverter 99 receiving the loading pulse via terminal L.
  • the output of the inverter 99 is also connected by connection 100a to one of the inputs of the NAND gate 96a which receives on its other input by connection 101a the output of the door NAND AND 95a.
  • a “one” signal is applied to input 97a of the NAND gate 95a.
  • the negative loading pulse results in the presence of a “one” signal on the second input 98a which causes a “zero” signal at the output of the NAND gate 95a.
  • This “zero” signal applied to input 101a of the second NAND gate 96a which receives on its other input a “one” signal causes the appearance of a “one” signal on the reset input.
  • R of scale 92a Examination of the circuit associated with the flip-flop 92b shows that the closed position of the switch 10b causes for the flip-flop 92b a state opposite to that of the flip-flop 92a.
  • the appearance of the single loading pulse on terminal L causes the transfer of the identification code materialized by the position of the different switches 10 in the form of the state of the different flip-flops 92 which can then be read. in series by the clock signals applied to the inputs H. In the absence of a loading pulse, all the flip-flops remain in the zero state in the example illustrated.
  • the loading pulse could alternatively be suitably calibrated by a suitable circuit in the electronic lock, the pulse then only being taken into account if it corresponds to the expected calibration.
  • the identification system of the invention has been illustrated with reference to the circuit of FIG. 2 for the opening of an electric strike, it will be understood that it would be easy to adapt the system of the invention in order to achieve access control of premises or personnel management. In this case, in fact, it is possible to assign a certain number of bits of the identification code of the key to a predetermined address.
  • the name of the person and the time of entry or exit may be automatically kept by the electronic lock.
  • the name of the user or a code corresponding to an identification information item stored after the use of the key is entered in another memory area containing an identification code which is read by the second serial conversion register 46 /parallel.
  • Fig. 5 illustrates an identification system of this type making it possible to modify, sequentially at selected periods in time or after a determined number of uses of the key, the internal identification code of the latter.
  • the circuit illustrated by way of example in FIG. includes a certain number of circuit elements already described with reference to FIG. 2 and which therefore bear the same references.
  • the shift register 9 comprises 32 bits corresponding respectively to sixteen switches 10 similar to the switches with preprogrammed position of the diagram of FIG. 2 and sixteen fuses 102 which can be destroyed in order to modify the identification code initially contained in the key 2.
  • the signal supplied on terminal E comes from a write circuit 103 comprising a parallel / serial shift register 104 and an interface circuit 105. It will be noted that the direction of the shift in the register 104 is that of arrow 106 and that the interface 103 only supplies a coded signal for bits 16 to 1 of the register 104 corresponding to the positions of the fuses 102 of the register 9.
  • the entire system is controlled by a microprocessor 107 which is capable of sending by the data bus 108 to an interface circuit 109 a code stored in the protected memory 110 which is part of the series / parallel conversion circuit and comparison 25 and which processes bits 32 to 17 of the serial / parallel shift register 111 corresponding to the bits of switches 10.
  • the microprocessor is capable, via the data bus 112 connected to the interface circuit 113, of sending data concerning the key to the comparator 114 which is connected as regards bits 1 to 16 to shift register 111.
  • the microprocessor is also capable, via the data bus 115, of carrying out a sequential or random modification of the state of the various fuses 102 by acting through the interface 105 on the shift register 104 of the means d writing 103 as previously explained.
  • the various outputs of the circuit for authorizing successive tests and for controlling the alarm 27 are connected by the connections 116 and 117 to the microprocessor 107 with a view to triggering the alarm according to methods determined by programming the microprocessor.
  • the microprocessor 107 is also capable of supplying a write authorization signal on the connection 118 connected to the input of two NI (NOR) gates 119 and 120.
  • the first NI gate 119 receives on its other input the pulse of loading coming from the loading circuit 18 via the connection 121.
  • the second NI 120 gate receives on its second input the read pulses coming from the series reading circuit 20 via the connection 122.
  • the outputs of the two gates 119 and 120 are connected via two inverters 123 and 124 respectively to terminal L and terminal H of the shift register 104, terminals which have the same function as the terminals of the same reference in register 9.
  • the system works as follows: when the key 2 is coupled with the electronic lock, a reading operation is first carried out similar to that which can be carried out with the system illustrated in fig.2. During this operation, the microprocessor 107 does not deliver any write authorization signal on the connection 118 so that the NI gates 119 and 120 are blocked and the write circuit 103 does not work.
  • the read operations first of all make it possible to identify the key using the fixed identification code initially contained in the switches 10. Indeed, after loading the fixed code contained in the switches 10 and the variable code represented by fuses 102 inside the shift register 9 by means of a loading pulse emitted by the circuit 18, the 32 bits of register 9 are read in series by means of the 32 pulses emitted by the read circuit 20.
  • bits 32 to 17 of the shift register 9 transferred by the shift register 111 are compared with the fixed content of the protected memory 110. Then bits 16 to 1 corresponding to the modifiable portion materialized by the fusiblas 102 are compared to the state of the code contained in the comparator 114. If all of these comparisons give a positive result, the microprocessor 107 provides by the bus 125 a control signal on the circuit or the organ e to order 126.
  • the microprocessor 107 When the read operation and the command have thus been carried out, it is possible to modify a portion of the memory area of the key 2 by breaking a number of the fuses 102. This operation can be performed periodically according to instructions which can be programmed in the microprocessor 107.
  • the microprocessor provides a write authorization signal on the connection 118 so as to change the state of output of the two NI doors 119 and 120.
  • the loading pulse supplied by the loading circuit 18 is applied to the input L of the shift register 104 which allows coded information contained in the microprocessor 107 or in an additional memory to transit via the interface circuit 105 as far as the different flip-flops corresponding to bits 16 to 1 of the shift register 104.
  • the microproces seur 107 commands via the data bus 112 and the interface circuit 113, the modification of the code to be compared by the comparator 114.
  • the successive read pulses emitted by the read circuit 20 are transmitted by the gate NI 120 to the terminal H of the register 104 so as to allow the reading thereof and the transmission of a serial signal on the terminal E of the shift register 9 of the key 2.
  • the fuses 102 are chosen so that the low current applied to their terminals as a function of the signal thus supplied is sufficient to cause them to rupture according to the "zero" or "one” level of these signals.
  • the read stop circuit 24 comprises two counters by 16, 42a and 42b.
  • the various fuses 102 are successively blown from right to left in FIG. 5.
  • a key which has not yet been the subject of such a modification will be recognized at the time of reading by the fact that the fixed code corresponding to the switches 10 will be suitably recognized, the modifiable part of the memory area being different from that contained in the comparator 114.
  • a falsified key will be easily recognized by the fact that no memory area will correspond to the information coded both in the comparator 110 and in the protected memory area 114.
  • the write command can be programmed according to criteria determined by the microprocessor 107 for example according to a determined sequence or each time a key is used or also according to any other determined criterion.
  • the embodiment illustrated in FIG. 6 differs from the embodiment of fig.5 5 mainly on three points.
  • First the fuses 102 correspond to bits 17 to 32 of the shift register 9 of the key while the switches 10 correspond to bits 1 to 16.
  • the position of the fixed and modifiable zones of the memory of key 2 is therefore reversed. compared to fig. 5.
  • the interface circuit 105 of the write circuit 103 cooperates with bits 17 to 32 of the shift register 104 and that the positions of the comparator 110 and of the protected memory 114 are reversed with respect to the register to offset 111 of the series / parallel conversion and comparison circuit 25.
  • the writing circuit 103 is controlled here by independent means comprising a charging circuit 127 at all points similar to the charging circuit 18, a series reading circuit 128 at all points similar to the reading circuit 20 and a write stop circuit 129 similar to the read stop circuit 24 and comprising a counter by sixteen 130 whose output QD is connected to the input A of the monostable 131 delivering by its output Q the reset signal of the master-slave flip-flop of the read circuit 128.
  • the counter 130 is reset to zero by the output signal from the reset circuit 30 via the connection 132 and the NAND gate 133.
  • the information coded inside the counter 130 is supplied by its inputs A, B, C, D by the connections 134 coming from the microprocessor 107. In this way, it can be seen that it is possible to stop the pulses transmitted. by the read circuit 128 before the sixteenth bit is reached. In this way, it becomes possible to cause the successive rupture of the right to the left of the number of fuses 102 corresponding to the coded information introduced into the counter 130 by the microprocessor 107.
  • the normal reading operation of the key 2 is done as in the embodiment of FIG. 5 by means of circuits 18 and 20 whose outputs are connected to NAND gates 135 and 136 connected to their output by inverters 137 and 138 at the respective terminals L and H of key 2.
  • the second inputs doors 135 and 136 are respectively connected to the outputs of circuits 127 and 128 via connections 139 and 140.
  • writing is also controlled by a signal from the microprocessor via the connection 141 connected to one of the inputs of a NAND gate 142 connected by its other input to terminal 12 of the key via the inverter 143 and supplying the first timer 36 at its output.
  • means have also been provided for supplying a rupture control signal for the various fuses 102 comprising a monostable 144 whose input B is connected to the output Q of the monostable 131 of the write stop circuit 129.
  • the monostable output Q of the 144 supplies via connection 145 a fuse breaking signal on the terminal F of the key.
  • Fig. 7 partially illustrates the circuit of a key adapted to cooperate with the system illustrated in FIG. 6.
  • fig. 7 in its lower part, the succession of flip-flops 92 associated with NAND gates 95 and 96, the operation of which has already been explained with reference to FIG. 4. All these flip-flops constitute, as we have seen, a parallel / series shift register, the direction of the shift being represented by arrow 146.
  • the switches 10 shown in FIG. 4 are here replaced by the various fuses 102.
  • the fuse rupture control is carried out by means of a second series / parallel shift register 147 constituted by a plurality of flip-flops 148 whose output 0 is connected to an input of an AND gate 149 receiving on its other input by l 'through connection 150 the fuse breaking signal appearing on terminal F.
  • the output of each of the AND gates 149 is connected to one of the terminals of a fuse 102, the other terminal of which is connected to earth by terminal T.
  • the direction of shift of the second register 147 represented by the arrow 151 is opposite to the direction of shift of the register formed by the flip-flops 92.
  • the inputs R and S of the first flip-flop 148p situated to the right of FIG. 7 receive via the two inverters 152, 153 cascaded the signal of writing appearing on the terminal E and coming from the shift register 104 visible in fig.6.
  • the fuse breaking signal appears on terminal F, which causes fuses 102 to break, for which a signal appears at the same time on output Q of the corresponding flip-flop 148.
  • the various flip-flops 148 are reset to zero by means of the loading signal for flip-flops 92 by means of the connection 154.
  • sixteen fuses 102 are shown constituting the modifiable zone of the memory of the key. For simplicity, only the right and left parts of the different elements have been shown in the figure. Nor has the figure shown the fixed part of the memory area corresponding to the various switches 10, the structure of which is identical to that which is illustrated in FIG. 4.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lock And Its Accessories (AREA)
  • Debugging And Monitoring (AREA)
  • Control Of Electric Motors In General (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
EP81102532A 1980-04-03 1981-04-03 Système d'identification par exemple d'une personne en vue de la commande d'un appareil électrique, d'un appareil mécanique ou de tout autre appareil Expired EP0037566B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81102532T ATE10040T1 (de) 1980-04-03 1981-04-03 Verfahren zur identifikation, beispielsweise von personen, im zusammenhang mit der ansteuerung einer einrichtung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8007570A FR2480010A1 (fr) 1980-04-03 1980-04-03 Systeme d'identification, par exemple d'une personne, en vue de la commande d'un appareil electrique, d'un appareil mecanique ou de tout autre appareil
FR8007570 1980-04-03

Publications (3)

Publication Number Publication Date
EP0037566A2 EP0037566A2 (fr) 1981-10-14
EP0037566A3 EP0037566A3 (en) 1981-11-18
EP0037566B1 true EP0037566B1 (fr) 1984-10-24

Family

ID=9240514

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81102532A Expired EP0037566B1 (fr) 1980-04-03 1981-04-03 Système d'identification par exemple d'une personne en vue de la commande d'un appareil électrique, d'un appareil mécanique ou de tout autre appareil

Country Status (7)

Country Link
US (1) US4412216A (enrdf_load_stackoverflow)
EP (1) EP0037566B1 (enrdf_load_stackoverflow)
JP (1) JPS576070A (enrdf_load_stackoverflow)
AT (1) ATE10040T1 (enrdf_load_stackoverflow)
DE (1) DE3166779D1 (enrdf_load_stackoverflow)
ES (1) ES8202644A1 (enrdf_load_stackoverflow)
FR (1) FR2480010A1 (enrdf_load_stackoverflow)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2506047B1 (fr) * 1981-05-12 1986-02-07 Mole Alain Systeme d'identification electronique
ES532336A0 (es) * 1983-05-11 1985-01-16 Savoyet Jean L Dispositivo de identificacion electronica
US4642631A (en) * 1984-11-01 1987-02-10 Rak Stanley C Interactive security system
US4686912A (en) * 1985-04-15 1987-08-18 The Protech Partnership Electrically controlled locking apparatus and safe utilizing same
US4829296A (en) * 1986-04-30 1989-05-09 Carey S. Clark Electronic lock system
JPH0222144Y2 (enrdf_load_stackoverflow) * 1987-11-18 1990-06-14
AU5255396A (en) * 1995-03-16 1996-10-02 Medeco Security Locks, Inc. Universal apparatus for use with electronic and/or mechanical access control devices
US5877483A (en) * 1995-07-18 1999-03-02 Dell Usa, L.P. Method and apparatus for automatically implementing computer power on and logon functions using encoded ID card
CN104484932B (zh) * 2014-12-30 2017-12-22 广州视声智能科技有限公司 一种门铃开锁控制电路

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CS156450B2 (enrdf_load_stackoverflow) * 1969-02-28 1974-07-24
US3637994A (en) * 1970-10-19 1972-01-25 Trw Inc Active electrical card device
US3859634A (en) * 1971-04-09 1975-01-07 Little Inc A Digital lock system having electronic key card
US3911397A (en) * 1972-10-24 1975-10-07 Information Identification Inc Access control assembly
US3906460A (en) * 1973-01-11 1975-09-16 Halpern John Wolfgang Proximity data transfer system with tamper proof portable data token
US3944976A (en) * 1974-08-09 1976-03-16 Rode France Electronic security apparatus
US4004133A (en) * 1974-12-30 1977-01-18 Rca Corporation Credit card containing electronic circuit
US4038637A (en) * 1975-11-24 1977-07-26 Peters Sherman M Access control system
US4031434A (en) * 1975-12-29 1977-06-21 The Eastern Company Keyhole-less electronic lock
US4079356A (en) * 1976-03-30 1978-03-14 The United States Of America As Represented By The Secretary Of The Army Coded electronic lock and key
FR2353103A1 (fr) * 1976-05-26 1977-12-23 Thomson Csf T Vt Sa Systeme de reconnaissance d'objets
FR2363837A1 (fr) * 1976-09-06 1978-03-31 Kis France Sa Ensemble electronique utilisable notamment comme serrure ou comme dispositif de verrouillage et de declenchement d'un mecanisme quelconque
US4105156A (en) * 1976-09-06 1978-08-08 Dethloff Juergen Identification system safeguarded against misuse
US4144523A (en) * 1977-11-23 1979-03-13 General Motors Corporation Digital key system
JPS5478300A (en) * 1977-12-03 1979-06-22 Tomoo Yamamoto Electronic key for electronic lock
FR2417141A1 (fr) * 1978-02-09 1979-09-07 Travaux Indls Pour Electricite Systeme de controle par reconnaissance automatique d'un objet marque
US4250533A (en) * 1979-05-21 1981-02-10 Nelson Avi N Security system

Also Published As

Publication number Publication date
EP0037566A3 (en) 1981-11-18
FR2480010B1 (enrdf_load_stackoverflow) 1984-06-22
ES8202644A1 (es) 1982-04-01
FR2480010A1 (fr) 1981-10-09
EP0037566A2 (fr) 1981-10-14
US4412216A (en) 1983-10-25
ATE10040T1 (de) 1984-11-15
JPS576070A (en) 1982-01-12
DE3166779D1 (en) 1984-11-29
ES501624A0 (es) 1982-02-01

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