JP2007332546A - Controller for door lock mechanism, and control method for door lock mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a controller for a door lock mechanism capable of carrying out authentication processing in a short time even if its structure can carry out authentication controlling the door lock mechanism by a plurality of communicating systems, and a method for controlling a door lock mechanism. <P>SOLUTION: The controller for the door lock mechanism comprises an antenna driving circuit 22 for smart key-less entry sending a radio signal to an electronic key 41 through a smart entry antenna 5, and receiving authentication information for actuating the door lock mechanism; an RFID antenna driving/receiving circuit 18 and an RFID communication IC23 giving/receiving the radio signal to/from a cellular phone terminal 42 through an RFID antenna 4, and receiving the authentication information for actuating the door lock mechanism; and a CPU 21 controlling an actuator 20 on the basis of the authentication information. The CPU 21 sends the radio signal from the RFID antenna 4, during a period for waiting response from the electronic key 41 when the smart entry antenna 5 sends a radio signal. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a door lock mechanism control device and a door lock mechanism control method for controlling a door lock mechanism of a vehicle or the like by wireless communication technology.

  Conventionally, a keyless entry system that uses a wireless communication technology to drive a door lock mechanism of a vehicle and locks and unlocks the vehicle door is known in Patent Document 1 and Patent Document 2 below.

  The technology described in Patent Document 1 is a method of locking a vehicle door by driving a door lock mechanism of a vehicle by performing communication between a wireless IC tag built in a mobile phone and a reader / writer mounted on the vehicle. Unlocking.

Further, in the technique described in Patent Document 2, when a user presses a request switch provided on a door knob of a vehicle, a communication circuit provided with an antenna on the door knob of the vehicle is activated, and a magnetic field is within a predetermined range from the antenna. When the electronic key exists within the range of the magnetic field, an ID signal is transmitted from the electronic key to the communication circuit. Then, when the ID from the electronic key received by the communication circuit is compared with the regular ID held in the vehicle and it is determined that the ID from the electronic key is legitimate, A vehicle door locking mechanism is driven to lock or unlock the vehicle door.
Japanese Patent Laid-Open No. 2006-060683 JP 2005-120662 A

  By the way, for the convenience improvement of the user, the door lock mechanism control function using the wireless IC tag described in Patent Document 1 described above and the door lock using the electronic key described in Patent Document 2 described above. It is conceivable to provide both of the control function of the mechanism, and it is conceivable to control the door lock mechanism when authentication is possible with either the electronic key or the wireless IC tag.

  In such a configuration, when a user who does not hold the electronic key accidentally presses the request switch, if the wireless IC tag of the mobile phone and the reader / writer are within the communicable range, first the request switch Authentication of the electronic key is performed by pressing, and then authentication of the wireless IC tag is performed. However, since a plurality of electronic keys are registered in advance and authentication is performed for all electronic keys, the period from when the request switch is pressed until authentication for all electronic keys is completed as the number of registered electronic keys increases. Becomes longer, and the period until the authentication by the wireless IC tag is performed becomes longer.

  Therefore, the present invention has been proposed in view of the above-described circumstances, and even if it is configured to perform authentication for controlling the door lock mechanism by a plurality of communication methods, the authentication process can be performed in a short time. It is an object of the present invention to provide a door lock mechanism control device and a door lock mechanism control method capable of performing the above.

  The present invention relates to a door lock mechanism control device that controls an actuator that operates a door lock mechanism that locks and unlocks a vehicle door, and transmits a radio signal via a first antenna to operate the door lock mechanism. The first communication means for receiving the authentication information for causing the first communication terminal to transmit the wireless signal via the second antenna and the authentication information for operating the door lock mechanism to the second communication. Second communication means received from the terminal, and control means for controlling the actuator based on authentication information received by the first communication means or authentication information received by the second communication means. In order to solve the above-described problem, the control device for the door lock mechanism has a second response waiting period from the first communication terminal to the fact that the control means transmits a radio signal by the first antenna. A wireless signal is transmitted from the antenna.

  The present invention relates to a door lock mechanism control method for controlling an actuator that operates a door lock mechanism that locks and unlocks a vehicle door, and transmits a radio signal via a first antenna. A first communication step for receiving authentication information for operation from the first communication terminal, and sending out a radio signal via the second antenna to provide authentication information for operating the door lock mechanism A second communication step received from the communication terminal; and an actuator control step for controlling the actuator based on the authentication information received by the first antenna or the authentication information received by the second antenna. In order to solve the above-described problem, this door lock mechanism control method transmits and receives a radio signal via the second antenna in the second communication step, and transmits a radio signal via the first antenna in the first communication step. This is done during the response waiting time for the transmission of.

  According to the door lock mechanism control device and the door lock mechanism control method according to the present invention, the second antenna is in a waiting period for a response from the first communication terminal to the transmission of the radio signal by the first antenna. Since a wireless signal is transmitted from the first communication terminal, even when there is no response from the first communication terminal, authentication can be performed to control the door lock mechanism when a response is obtained from the second communication terminal. Even if it is the structure which can perform the authentication which controls this, an authentication process can be performed in a short time.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  In the present invention, as shown in FIG. 1, a request switch 3, an RFID (radio frequency identification) antenna 4, and a smart entry antenna 5 are mounted on a handle grip 2 of a door knob attached to the outside of the door panel 1. Since both the RFID antenna 4 and the smart entry antenna 5 generate a radio signal due to a magnetic field change, the RFID antenna 4 and the smart entry antenna 5 are made of resin in order to avoid a narrow communication range due to the influence of the metal door panel 1. It is incorporated in the handle grip 2.

  FIG. 2 is a block diagram showing the configuration of the door lock mechanism control device. When the request switch 3 is pressed, the smart entry antenna 5 sends a radio signal, for example, a 125 kHz carrier wave, to a predetermined range. The smart entry antenna 5 is composed of a resonance circuit including a coil 31 and a capacitor 32, and transmits the above-described radio signal. An antenna (not shown) having the same configuration as that of the smart entry antenna 5 is provided in the vehicle interior, and a radio signal for searching for the electronic key 51 existing in the vehicle is transmitted from the antenna.

  When the electronic key 51 exists in a predetermined range where the smart entry antenna 5 transmits a radio signal, that is, when the electronic key 51 receives a radio signal transmitted by the smart entry antenna 5, a memory (not shown) of the electronic key 41 The ID information stored in is returned. The ID information of the electronic key 41 is authentication information for authenticating the electronic key 41 by the in-vehicle controller 11.

  The ID information returned by the electronic key 41 is received by the UHF antenna 15, input to the UHF receiver 14, and further output to the CPU 21. Here, the UHF receiver 14 removes the UHF band carrier wave, extracts only the ID information, and outputs it to the CPU 21.

  The RFID antenna 4 transmits a radio signal in a communication range of, for example, 10 cm every predetermined period using a 13.56 MHz carrier wave based on ISO (International Organization for Standardization) / IEC (International Electrotechnical Commission) 14443.

  When there is a mobile phone terminal 42 with a built-in RFID tag in a predetermined range where the RFID antenna 4 transmits a radio signal, that is, when the mobile phone terminal 42 receives a radio signal transmitted by the RFID antenna 4, the mobile phone terminal The ID information stored in 42 RFID tags (not shown) is returned. The ID information of the mobile phone terminal 42 is authentication information for authenticating the mobile phone terminal 42 by the in-vehicle controller 11.

  The RFID antenna 4 includes a resonance circuit including a coil 33 and a capacitor 34, and generates a 13.56 MHz radio signal by generating a magnetic field from the coil 33 in accordance with a transmission signal from the RFID antenna drive / reception circuit 16. Further, a radio signal from the mobile phone terminal 42 is output to the RFID antenna driving / receiving circuit 16 by electromagnetic induction by the coil 33 and the capacitor 34. The RFID antenna drive / reception circuit 16 removes the carrier wave from the output radio signal and outputs it to the RFID communication IC 23. The RFID communication IC 23 further extracts only the ID information and outputs it to the CPU 21.

  The in-vehicle controller 11 controls the operation of the smart entry antenna 5 and the RFID antenna 4 by controlling the smart keyless entry antenna drive circuit 22 and the RFID communication IC 23, and also receives the ID information received from the UHF antenna 15 or the RFID antenna 4. The actuator 18 is controlled based on the ID information received via. The in-vehicle controller 11 includes a CPU 21, a smart keyless entry antenna drive circuit 22, and an RFID communication IC (Integrated Circuit) 23.

  The actuator 18 receives power supply from the actuator drive circuit 17 and operates the door lock mechanism to place the door lock in a locked state or an unlocked state. The in-vehicle controller 11 outputs a control signal for the door lock mechanism to the actuator drive circuit 17 and operates the actuator 18 in accordance with the control signal.

When the CPU 21 stores the ID information of the plurality of electronic keys 41, the CPU 21 causes the smart entry antenna 5 to sequentially transmit a radio signal including each ID information. For example, when the CPU 21 stores three pieces of ID information “1”, “2”, and “3” of the electronic key 41, the CPU 21 first sends a radio signal including the ID information “1” and waits for a response. When the electronic key 41 does not respond and the response waiting time elapses, a wireless signal including the next ID information “2” is transmitted to become a response waiting time. When the electronic key 41 does not respond and the response waiting time elapses, The wireless signal including the ID information “3” is sent to become a response waiting time. When the electronic key 41 does not respond and the response waiting time elapses, it is determined that the user does not hold any electronic key 41. When a plurality of electronic keys 41 are detected, it is determined that there are a plurality of electronic keys 41 within the communicable range of the smart entry antenna 5.

  Next, the operation of the door lock mechanism control device having a configuration in which the communication method performed to drive the actuator 20 is different will be described with reference to FIG.

  First, as shown in FIG. 3A, when the CPU 21 detects an operation of pressing the request switch 3, first, the electronic key 41 in which ID information “1” is recorded in the search period T1 from time t1 to time t5. Next, the electronic key 41 in which the ID information “2” is recorded is searched in the search period T2 from time t5 to time t6. In the search period T1, the CPU 21 sends out a radio signal for searching whether the electronic key 41 in which the ID information “1” is recorded exists outside the vehicle, and then the electronic key in which the ID information “1” is recorded. The smart entry antenna 5 and an in-vehicle antenna (not shown) are driven in the order of transmitting a radio signal for searching whether the terminal 41 exists in the vehicle. Thereby, in the search period T1, as shown in FIG. 3B, the radio signal for searching the electronic key 41 outside the vehicle is scanned at times t1 to t2, and the radio signal for scanning the electronic key 41 inside the vehicle is Scan from t3 to t4.

  Further, the CPU 21 waits for a response from the first electronic key 41 to the UHF antenna 15 after the time t2 shown in FIG. 3C during the search period T1, as shown in FIG. 3D. A radio signal including a response command is periodically transmitted from the antenna 4, and a radio signal including a response command is transmitted in a response waiting period from the electronic key 41 storing the ID information “1” at time t 4 to the UHF antenna 15. Send out regularly.

  Also in the search period T2 of the registered electronic key 41 in which the ID information “2” following the search period T1 is recorded, the electronic key 41 from which the ID information “2” is recorded is connected to the UHF antenna 15. A radio signal including a response command is periodically transmitted from the RFID antenna 4 during the response waiting time.

  The CPU 21 transmits the radio signal by the RFID antenna 4 during a period in which the radio signal including any one of the ID information of the plurality of electronic keys 41 registered in advance is sequentially transmitted from the smart entry antenna 5. When the response from the mobile phone terminal 42 is received, the operation of transmitting a radio signal from the smart entry antenna 5 is stopped.

  Therefore, the door lock mechanism control device can send a radio signal from the RFID antenna 4 during the response waiting time from the electronic key 41 to the UHF antenna 15 and receive a response from the mobile phone terminal 42. Even when a user who has only the terminal 42 presses the request switch 3, the actuator 20 can be controlled without requiring a long time to respond to the mobile phone terminal 42. In particular, when a plurality of ID information is registered in the CPU 21 and the actuator 20 can be controlled by any one of the plurality of electronic keys 41 in which the ID information is registered, the authentication of all the electronic keys 41 is completed. The authentication of the mobile phone terminal 42 can be completed before.

  Further, according to this door lock mechanism control device, when a wireless signal is periodically transmitted from the smart entry antenna 5 by pressing the request switch 3, the RFID antenna 4 can wait for a response to the wireless signal. Since the wireless signal is transmitted, the actuator can be operated in a short time both when the user operates the request switch 3 with the electronic key 41 and when the user operates the request switch 3 with the mobile phone terminal 42. 20 can be driven.

  Note that the 13.56 MHz radio signal to which the RFID tag responds and the UHF band radio signal do not interfere with each other because the frequency band is significantly different and the receiving antenna is not close.

  Next, another operation of the door lock mechanism control device will be described with reference to FIG.

  When the request switch 3 is not operated, the CPU 21 periodically transmits a 13.56 MHz radio signal by periodically generating a magnetic field from the RFID antenna 4 as shown in FIG. This is a search period for searching the terminal 42 (referred to as an RFID search operation period). When the request switch 3 is operated at time t11 shown in FIG. 4A and a signal is detected by the CPU 21 from the request switch 3 as shown in FIG. 4B, the CPU 21 is shown in FIG. 4C. As described above, first, a radio signal for searching for the electronic key 41 outside the vehicle is scanned, and then a response waiting time from the electronic key 41 to the UHF antenna 15 is set.

  In the waiting time for the response to the UHF antenna 15, the CPU 21 transmits a radio signal including a response command from the RFID antenna 4 as shown in FIG. At this time, if the user does not hold the electronic key 41 and the user performs an operation of holding the mobile phone terminal 42 against the handle grip 2 as shown in FIG. As shown, there is no response from the electronic key 41 to the UHF antenna 15. However, as shown in FIG. 4 (e), the mobile phone terminal 42 receives a response command from the RFID antenna 4 by the RFID tag, and at time t12. Then, a radio signal including its own ID information is transmitted as a response of the RFID tag.

  When the radio signal from the mobile phone terminal 42 is received by the RFID antenna 4, the CPU 21 performs the in-car operation performed after scanning the radio signal for searching the electronic key 41 outside the vehicle as shown in FIG. 4C at time t12. The scanning of the radio signal for searching the electronic key 41 is forcibly stopped. As a result, the smart keyless entry search period ends, and the RFID search period returns from time t13.

  When the radio signal from the mobile phone terminal 42 is received by the RFID antenna 4, the CPU 21 checks the ID information transmitted from the mobile phone terminal 42, and can authenticate that it is legitimate ID information. Controls the actuator drive circuit 19 to drive the actuator 20 as shown in FIG.

  As described above, the CPU 21 does not receive a response from the electronic key 41 to the transmission of the wireless signal by the smart entry antenna 5, and responds to the transmission of the wireless signal by the RFID antenna 4. When a response from the mobile phone terminal 42 is received, the operation of transmitting a radio signal from the smart entry antenna 5 can be stopped. Therefore, even when the user holding the mobile phone terminal 42 presses the request switch 3, the mobile phone terminal 42 can be authenticated in a short time, and the user holding the mobile phone terminal 42 can connect to the handle grip 2. When approaching, the RFID tag search period can be given priority.

  Further, in the door lock mechanism control apparatus that performs the operation of FIG. 3 or FIG. 4 described above, the CPU 21 does not use the mobile phone terminal 42 for a predetermined period such as 7 days or 14 days, and the RFID is used. If there is no response to the periodic transmission of the radio signal from the antenna 4, the operation of periodically transmitting the radio signal from the RFID antenna 4 may be stopped. This can avoid an increase in dark current when the vehicle is keyed off. When the wireless signal is not periodically transmitted from the RFID antenna 4 in this way, the RFID antenna 4 is operated when the mobile phone terminal 42 is held on the handle grip 2 after the request switch 3 is pressed. Therefore, it is necessary to set a rule in the CPU 21 such as periodically restarting the operation of transmitting a radio signal.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.

  That is, in the above-described embodiment, the case where wireless signals are exchanged using the electromagnetic induction method has been described. However, the present invention is not limited to this, and wireless signals may be exchanged using the radio wave method.

  In the above description, the case where wireless communication is performed between the smart entry antenna 5 and the electronic key 41 and wireless communication is performed between the RFID antenna 4 and the mobile phone terminal 42 has been described. The wireless communication function of the electronic key 41 and the wireless communication function of the mobile phone terminal 42 may be provided.

  Further, in the above description, an example in which the smart entry antenna 5 and the RFID antenna 4 are separate from each other has been described. However, a smart keyless entry radio signal and an RFID radio signal are transmitted and received by an antenna circuit including the same coil and capacitor. It may be a thing.

  Furthermore, when a sensor for detecting that the door lock mechanism of the door panel 1 is operated is connected as another in-vehicle controller 13, the CPU 21 uses the sensor signal from the other in-vehicle controller 13 to detect the smart keyless entry antenna. The drive circuit 22 may be controlled so that a wireless signal is transmitted from the smart entry antenna 5.

It is the schematic which shows the structure by which the smart entry antenna and the RFID antenna are accommodated in the same handle grip. It is a block diagram which shows the structure of the door lock mechanism control apparatus to which this invention is applied. 4 is a timing chart for explaining the operation of the door lock mechanism control device to which the present invention is applied, wherein (a) is an on / off state of a request switch, (b) is a driving state of an antenna unit for smart keyless entry, and (c) is a UHF antenna. (D) shows the driving state of the RFID antenna section. It is a timing chart explaining the operation | movement by the door lock mechanism control apparatus to which this invention is applied, (a) is a user's operation state, (b) is an on-off state of a request switch, (c) is a smart keyless entry antenna part. (D) shows the receiving state of the UHF antenna, (e) shows the driving state of the RFID antenna section, and (f) shows the driving state of the actuator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door panel 2 Handle grip 3 Request switch 4 RFID antenna 5 Smart entry antenna 11 In-vehicle controller 12 In-vehicle LAN bus 13 Other in-vehicle controller 13
14 UHF Receiver 15 UHF Antenna 16 RFID Antenna Drive / Receiver Circuit 17 Actuator Drive Circuit 18 Actuator 21 CPU
22 Antenna drive circuit for smart keyless entry 23 RFID communication IC
31, 33 Coil 32, 34 Capacitor 41 Electronic key 42 Mobile phone terminal

Claims (6)

In a control device for a door lock mechanism for controlling an actuator for operating a door lock mechanism for locking and unlocking a vehicle door,
A first communication means for transmitting a radio signal via the first antenna and receiving authentication information for operating the door lock mechanism from the first communication terminal;
A second communication means for transmitting a wireless signal via the second antenna and receiving authentication information for operating the door lock mechanism from the second communication terminal;
Control means for controlling the actuator based on authentication information received by the first communication means or authentication information received by the second communication means,
The control means causes the second antenna to transmit a radio signal during a response waiting period from the first communication terminal in response to the transmission of the radio signal by the first antenna. Control device for the lock mechanism.   The control means causes the first communication means to sequentially transmit a radio signal including any one authentication information of a plurality of first communication terminals registered in advance from the first antenna. Stopping the operation of transmitting the radio signal from the first antenna when receiving a response from the second communication terminal to the transmission of the radio signal by the second antenna during the period. The control device for a door lock mechanism according to claim 1, wherein the control device is a door lock mechanism.   The control means does not receive a response from the first communication terminal to the transmission of a radio signal by the first antenna, and transmits the radio signal by the second antenna; The control of the door lock mechanism according to claim 2, wherein an operation of transmitting a radio signal from the first antenna is stopped when a response is received from the second communication terminal with respect to what has been performed. apparatus.   The control means receives a radio signal from the second antenna when a period in which there is no response from the second communication terminal to the transmission of a radio signal by the second antenna exceeds a predetermined period. The control device for the door lock mechanism according to any one of claims 1 to 3, wherein the operation of sending out is stopped.   The door lock mechanism control device according to any one of claims 1 to 4, wherein the first antenna and the second antenna are accommodated in the same door knob of a vehicle. In a control method of a door lock mechanism for controlling an actuator for operating a door lock mechanism for locking and unlocking a vehicle door,
A first communication step of transmitting a radio signal via the first antenna and receiving authentication information for operating the door lock mechanism from the first communication terminal;
A second communication step of transmitting a wireless signal via the second antenna and receiving authentication information for operating the door lock mechanism from the second communication terminal;
An actuator control step for controlling the actuator based on authentication information received by the first antenna or authentication information received by the second antenna;
The transmission / reception of a radio signal via the second antenna in the second communication step is performed during a response waiting time for the transmission of the radio signal via the first antenna in the first communication step. Control method of door lock mechanism.

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