EP0153498A2 - Dispositif pour la commande à distance d'une centrale de verrouillage de portes pour véhicule à moteur - Google Patents

Dispositif pour la commande à distance d'une centrale de verrouillage de portes pour véhicule à moteur Download PDF

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Publication number
EP0153498A2
EP0153498A2 EP84116364A EP84116364A EP0153498A2 EP 0153498 A2 EP0153498 A2 EP 0153498A2 EP 84116364 A EP84116364 A EP 84116364A EP 84116364 A EP84116364 A EP 84116364A EP 0153498 A2 EP0153498 A2 EP 0153498A2
Authority
EP
European Patent Office
Prior art keywords
pulse
code
pulses
modulator
modulated
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.)
Withdrawn
Application number
EP84116364A
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German (de)
English (en)
Other versions
EP0153498A3 (fr
Inventor
Andreas-Assis Timur
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.)
Mannesmann VDO AG
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Mannesmann VDO AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mannesmann VDO AG filed Critical Mannesmann VDO AG
Publication of EP0153498A2 publication Critical patent/EP0153498A2/fr
Publication of EP0153498A3 publication Critical patent/EP0153498A3/fr
Withdrawn legal-status Critical Current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
    • G07C2009/00769—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 wireless means
    • G07C2009/00785—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 wireless means by light

Definitions

  • the invention relates to a device for contactless, remote-controlled door locking, in particular central locking of motor vehicles, according to the preamble of claim 1.
  • the modulation of the electromagnetic carrier has a significant influence on the properties of the device for contactless, remote-controlled door locking. So you can think of modulating the carrier with the coded word pulse duration by assigning the different logical meaning of each bit (high or low) to a pulse of different lengths. This creates a pulse train or a pulse of permanently modulated pulses.
  • a disadvantage of this type of modulation is the relatively large power consumption of the transmitter, in particular of the transmitter stage, which generates the electromagnetic radiation. This causes a relatively rapid consumption of the batteries, which should be as small and compact as possible, and a corresponding power loss in the transmission stage, which in turn requires the use of correspondingly powerful components.
  • the transmitter requires, among other things, switchable oscillators, the frequencies of which must be kept sufficiently stable. In particular, frequencies of 28 and 35 kHz have been chosen for the operation of an ultrasonic oscillator as a transmitter, instead of a transmitter of electromagnetic radiation.
  • the oscillator is controlled by a switch, which in turn is operated by a clock generator.
  • the switch switches the serial output of a parallel series converter (shift register), which is fed with a hard-wired word at its parallel inputs.
  • a parallel series converter shift register
  • the signal received by an ultrasound microphone is first amplified and then fed to a phase-locked loop circuit and decoded with a control logic.
  • the decoded code levels are in turn fed into a converter which acts as a series parallel converter. It compares the content of the converter at parallel outputs with a code, which is in turn stored, and actuates an actuator of the locking device when the comparison is made.
  • a relatively large amount of energy is still required for the wireless transmission of the code word, albeit less than in the case of pulse duration modulation.
  • the present invention has for its object to develop a device for non-contact remote-controlled door locking, in particular a central locking of motor vehicles, according to the preamble of claim 1, that the disadvantages of the corresponding known devices are avoided, that is, with the device a coded wireless Pulse can be generated with low circuit complexity and, above all, low energy consumption.
  • the coded pulse should be able to be transmitted wirelessly with a high level of interference immunity and in turn should be precisely decodable in the receiver without great circuitry complexity. With low energy requirements, the focus is on a good ratio of the wirelessly transmitted useful signal to possible interference signals. As a result of the low energy consumption of the transmitter, it should be able to be compact and require little maintenance.
  • the coded word which is transmitted by the electromagnetic radiation, preferably infrared radiation, is modulated on the carriers by pulse position modulation (PPM).
  • PPM pulse position modulation
  • Each bit of the word is thus transmitted by a unit pulse of relatively short duration, which is more or less distant in time from another predetermined pulse according to the logic level of the bit.
  • These two standard pulses practically mark the beginning and end of a permanently modulated pulse, which, however, is not transmitted between the pulse edges.
  • the contact-free transmission of the modulated electromagnetic radiation in the case of infrared radiation takes place by means of short flashes of light, which represent the unit symbols.
  • short means a substantially shorter period of time than the lengths of a pulse duration modulated pulse from which the unit pulses at the beginning and end are derived.
  • the transmission method results in considerable current savings, since the current required to form the electromagnetic radiation can be up to a factor of 100 lower than in the case of burst modulation. Due to the pulse position modulation instead of the pulse duration modulation, the transmission stage, in particular a transmission diode for emitting infrared radiation, is also loaded with less power loss. With the same power requirement of the transmitter, the useful signal can be increased compared to the noise signal. There is more accurate pulse demodulation in the receiver than in the case of pulse duration modulation Pulse possible because the decoding can be triggered each time by the same pulse edge (rising or falling) and not by alternately rising and falling pulse edges as in the case of pulse duration modulation
  • Claim 2 contains little complex means in the transmitter to form a time sequence corresponding to the code word to be transmitted pulse duration modulated pulses, a corresponding sequence of pulse position modulated, short unit pulses.
  • Claim 3 specifies how a sequence of 2n pulse duration modulated pulses can be formed with an encoder which has n parallel inputs which are connected to n powers of a code memory. This significantly increases the variety of possible code words and thus significantly increases security against unauthorized unlocking with little additional effort.
  • a safety circuit is particularly advantageously provided in the receiver, which detects the unit pulse assigned to the beginning or the end of a pulse duration modulated pulse of a bit and helps to prevent unlocking due to incorrect pulses occurring in the transmission path.
  • the transmitter further comprises measures which also supply the first received unit pulse of a pulse for comparison with the code stored in the receiver. The first unit pulse is therefore not lost to the evaluation of the transmitted code word despite the safety circuit.
  • Claim 7 specifies the arrangement of a delay element in the signal flow direction of the received unit pulses before a D flip-flop, which carries out the conversion of two successive unit pulses into a pulse-duration-modulated pulse.
  • an evaluable, permanently modulated pulse can also be obtained from the first short unit pulse by an art circuit at the output of the D flip-flop and at the output of the mon flop provided according to claim 6. - The evaluation is therefore never supplied with a short needle pulse which could falsify the recognition of the transmitted coded word.
  • An additional monostable multivibrator according to claim 8 is used for pulse formation from the received unit pulses in such a way that by an edge (the trailing edge) These unit pulses generate particularly short needle pulses which trigger the monostable multivibrator to set the D flip-flop.
  • the latter monostable multivibrator and the D flip-flop form the fuse circuit.
  • Fig. 1 denotes an encoder, to the parallel inputs 2 of which a diode matrix 3 is connected.
  • a series output of the encoder is labeled 4.
  • the encoder comprises twelve parallel inputs 2, which are connected to a corresponding number of lines, for example five of the diode matrix.
  • the diode matrix comprises a left branch of any insertable diodes 6 and a right one Branch of diodes which can also be inserted as desired.
  • the left branch and the right branch can be activated alternately by a multivibrator 8.
  • the En.coder generates a sequence of pulses, which for each of the two possible switching states of the multivibrator comprises twelve bits or permanently modulated pulses.
  • the pulse duration depends on the logic level, with logic 1 being assigned a short pulse duration and logic 0 being assigned a long pulse duration.
  • the pulse duration is in turn determined in that a diode in the left or right branch is assigned to a corresponding parallel input of the parallel inputs 2 or not.
  • This sequence of pulses is shown with the pulse a in a first time interval for the left branch of the diode matrix and the pulse b during a subsequent second time interval for the right branch of the diode matrix.
  • the entire word thus consists of 24 bits corresponding to a sequence of 24 permanently modulated pulses.
  • the one branch e.g. 6, the diode matrix in Fig. 2 is completely covered with diodes, while the other branch, e.g. 7, has no diodes.
  • the pulse permanently modulated with the coded word during the first and second time interval is converted with the edge modulator into a pulse position-modulated pulse, which is thus also modulated in accordance with the coded word.
  • a pulse is thus generated in the edge modulator 9, in which relatively short unit pulses at the beginning and end of a permanently modulated pulse on the series output 4 mark the logic level of this permanently modulated pulse.
  • the individual impluses occur on an output line 10.
  • Pulse c is assigned the pulse d consisting of short unit pulses on the output line 10 in FIG. 1.
  • the edge modulator 9 comprises two exclusive NOR gates 11 and 12, of which the exclusive NOR gate is only connected as a negation point.
  • the exclusive NOR gate 12 receives a pulse duration modulated pulse from the series output 4, which is designated as Y 1 in FIG. 4.
  • a second input of the exclusive NOR gate 12 receives an inverted - exclusive NOR gate 11 - and delayed - delay element 13 - pulse Y 2 .
  • the exclusive NOR gate 12 then only forms a short pulse Y 3 on the output line 10 if either the pulse Y 1 or the pulse Y 2 is present.
  • an IR diode 15 is activated via a TMOS transistor 14, so that this emits short infrared light flashes corresponding to the unit pulses Y 3 .
  • the TMOS transistor 14 essentially forms the transmission stage 16 in FIG. 1.
  • Fig. 1 the transmitter and the infrared diode itself belong to the modulator which modulates the emitted infrared light.
  • the circuit arrangement of the small transmitter discussed so far is fed by a power supply part 17 with a voltage converter 18.
  • a circuit implementation of the power supply and the voltage converter is shown in Fig. 2 within the broken lines.
  • the voltage converter supplies two button cells, which form the power supply 17. a voltage of approximately 9 volts for the encoder and the exclusive NOR gates.
  • the IR diode 15 can also be supplied with the relatively low voltage, since the TMOS transistor is selected for its activation. This also forms a current limiting resistor, so that no additional means for limiting current when heat is required.
  • FIG. 5 shows an essential part of the receiver. It is assumed that in a receiving part, not shown, which is connected to an input line 19, the received infrared light impulses are converted into appropriately shaped electrical impulses and amplified. Pulses therefore occur on the input line 19, the shape and course of which essentially correspond to the pulse d in FIG. 3.
  • a demodulator designed as a safety circuit with a monostable multivibrator 20, which has a dynamic input, and a D flip-flop 21 are provided to demodulate this sequence of unit pulses.
  • the monoflop time of the monostable multivibrator 20 is set so that it is at least twice as long as the pulse length for two bits.
  • An output of this monostable multivibrator is connected to a set input S of the D flip-flop.
  • the reset input R is grounded.
  • a negated output of the D flip-flop Q is fed back to a static input D in the usual way.
  • the D flip-flop practically acts as a frequency divider.
  • a further monostable multivibrator 23 is connected upstream of the monstable multivibrator 20.
  • a timer 24 on the further monostable multivibrator generates a needle pulse, which is even shorter than the unit pulse, at the output Q of the further monostable multivibrator 23.
  • This monostable multivibrator generates a needle pulse each time the negative edge of a standard pulse occurs on its. dynamic input.
  • the monostable multivibrator 20 is triggered with the needle pulses, which cannot normally fall back due to the dimensioning of the timing element 22, since it is triggered again each time beforehand.
  • the input pulse at the dynamic input of the D flip-flop can be viewed as pulse y3 in FIG. 4 and the output pulse at output Q as y 1 in FIG. 4.
  • the received light pulse is demodulated.
  • the standard pulses Through a delay element 25, which is connected upstream of the dynamic input of the D flip-flop, the standard pulses only reach the input when the set input S is prepared. This means that no standard pulse for switching the permanently modulated rectangular pulse at output ⁇ can be lost.
  • the output Q is coupled to a series parallel converter 26, the parallel outputs 27 of which are led to a comparator 28.
  • the permanently modulated rectangular pulse generated in the D flip-flop is thus compared in the comparator with a code word which is stored in a code memory 29. If the comparison is successful, an actuator 31 is made via a pulse shaper 30. Unlocking or locking triggered and the converter 26 reset via a line 32 at the same time.
  • the circuit of the receiver can be designed in such a way that two to three matching pulses must first be received before the actuator 31 is activated.

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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)
EP84116364A 1984-03-02 1984-12-27 Dispositif pour la commande à distance d'une centrale de verrouillage de portes pour véhicule à moteur Withdrawn EP0153498A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3407736 1984-03-02
DE19843407736 DE3407736A1 (de) 1984-03-02 1984-03-02 Einrichtung zur beruehrungslosen fernbedienbaren tuerverriegelung, insbesondere einer zentralverriegelung von kraftfahrzeugen

Publications (2)

Publication Number Publication Date
EP0153498A2 true EP0153498A2 (fr) 1985-09-04
EP0153498A3 EP0153498A3 (fr) 1988-04-06

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EP84116364A Withdrawn EP0153498A3 (fr) 1984-03-02 1984-12-27 Dispositif pour la commande à distance d'une centrale de verrouillage de portes pour véhicule à moteur

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EP (1) EP0153498A3 (fr)
DE (1) DE3407736A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0214745A1 (fr) * 1985-08-09 1987-03-18 Toyota Jidosha Kabushiki Kaisha Appareil sans clé pour entrer dans un véhicule
US4845505A (en) * 1987-02-13 1989-07-04 Toyota Jidosha Kabushiki Kaisha Automobile antenna system for diversity reception
US5508687A (en) * 1993-03-25 1996-04-16 Diehl Gmbh & Co. Remote control, in particular for a locking device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3840857A1 (de) * 1988-12-03 1990-06-07 Hella Kg Hueck & Co Einrichtung zur fernsteuerung von sicherungseinrichtungen
WO1991014065A1 (fr) * 1990-03-07 1991-09-19 Siegfried Sikora Module de verrouillage de vehicules a moteur a verrou de porte telecommande

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2407538A1 (fr) * 1977-10-27 1979-05-25 Sony Corp Installation de telecommande
DE2824421A1 (de) * 1978-06-03 1979-12-13 Bosch Gmbh Robert Schaltanordnung zur elektronischen ver- oder entriegelung von sicherheitseinrichtungen, insbesondere als diebstahlsschutz in einem kraftfahrzeug

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2407538A1 (fr) * 1977-10-27 1979-05-25 Sony Corp Installation de telecommande
DE2824421A1 (de) * 1978-06-03 1979-12-13 Bosch Gmbh Robert Schaltanordnung zur elektronischen ver- oder entriegelung von sicherheitseinrichtungen, insbesondere als diebstahlsschutz in einem kraftfahrzeug

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ELEKTRONIK PRAXIS, Band 15, Nr. 7, Juli 1980, Seiten 26-28, Vogel-Verlag, W}rzburg, DE; B. NOVOTNY: "TEA 1009 - ein integrierter Infrarot-Vorverst{rker" *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0214745A1 (fr) * 1985-08-09 1987-03-18 Toyota Jidosha Kabushiki Kaisha Appareil sans clé pour entrer dans un véhicule
US4845505A (en) * 1987-02-13 1989-07-04 Toyota Jidosha Kabushiki Kaisha Automobile antenna system for diversity reception
US5508687A (en) * 1993-03-25 1996-04-16 Diehl Gmbh & Co. Remote control, in particular for a locking device

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Publication number Publication date
DE3407736A1 (de) 1985-09-05
EP0153498A3 (fr) 1988-04-06

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