JP2012087597A - Locking system for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a locking system for a vehicle, capable of appropriately controlling a door lock unlocking permission.SOLUTION: A portable machine 1 includes: first identification information acquisition means for acquiring identification information intrinsic to a base station transmitted by a radio communication base station 3 which is present around as portable machine acquisition identification information; and portable machine acquisition identification information transmission means for transmitting the portable machine acquisition identification information acquired by the first identification information acquisition means to an in-vehicle machine 2. The in-vehicle machine includes: second identification information acquisition means for acquiring the identification information intrinsic to the base station transmitted by the radio communication base station which is present around as in-vehicle machine acquisition identification information; portable machine acquisition identification information reception means for receiving the portable machine acquisition identification information transmitted from the portable machine acquisition identification information transmission means; identification information determination means for determining whether or not the portable machine acquisition identification information and the in-vehicle machine acquisition identification information match; and unlocking permission control means for permitting the unlocking of an electronic lock when the portable machine acquisition identification information and the in-vehicle acquisition identification information match, and inhibiting the unlocking of the electronic lock when they do not match.

Description

  The present invention relates to a vehicle locking system, and more particularly to a vehicle locking system including a portable device and an in-vehicle device.

  2. Description of the Related Art Conventionally, a system has been developed that enables remote control of the door locking and the like of a vehicle by communication between a portable device carried by a user and an in-vehicle device mounted on the vehicle.

  An example of such a system is disclosed in Patent Document 1. The vehicle antitheft device disclosed in Patent Literature 1 is a device that unlocks an engine start or a door lock based on identification information transmitted by a mobile phone.

JP 2004-224265 A

  However, in the conventional system as shown in Patent Document 1, there is a possibility that the unlocking of the door lock of the vehicle is permitted at a timing not intended by the user. More specifically, when a user unintentionally presses a switch or the like of the portable device while holding the portable device and is relatively far away from the vehicle, unlocking of the door lock is permitted at an unnecessary timing. There was a possibility.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle locking system that can appropriately control permission and prohibition of unlocking of a vehicle door lock.

  In order to solve the above problems, the present application adopts the following configuration. That is, the first invention is a vehicle locking system including a portable device that can be carried by a user and an in-vehicle device that controls permission and prohibition of unlocking of an electronic lock of the vehicle. In the first invention, the portable device includes first identification information acquisition means for acquiring, as portable device acquisition identification information, identification information unique to the base station transmitted by a wireless communication base station existing in the vicinity. The portable device includes portable device acquisition identification information transmission means for transmitting portable device acquisition identification information acquired by the identification information acquisition means to the in-vehicle device. The in-vehicle device includes second identification information acquisition means for acquiring identification information unique to the base station transmitted by the wireless communication base stations existing in the vicinity as the in-vehicle device acquisition identification information. The in-vehicle device includes portable device acquisition identification information receiving means for receiving portable device acquisition identification information transmitted from the identification information transmitting means. The in-vehicle device includes identification information determination means for determining whether or not the portable device acquisition identification information matches the in-vehicle device acquisition identification information. The onboard device permits the unlocking of the electronic lock when the portable device acquisition identification information matches the onboard device acquisition identification information, and the portable device acquisition identification information does not match the onboard device acquisition identification information. And unlocking permission control means for prohibiting unlocking of the lock.

  According to the first invention, it is possible to appropriately control the unlocking permission of the door lock of the vehicle. Specifically, when the position of the portable device and the position of the in-vehicle device are relatively close, the identification information of the wireless communication base stations acquired by the portable device and the in-vehicle device respectively match. On the other hand, when the position of the portable device and the position of the in-vehicle device are relatively far apart, the identification information of the radio communication base station acquired by the portable device and the in-vehicle device is different. Here, since the unlocking of the electronic lock of the vehicle is permitted when the identification information matches, the unlocking permission operation is based on the user's intention when the portable device is located near the vehicle-mounted device. If there is a high possibility, unlocking the electronic lock of the vehicle can be permitted. On the other hand, when the portable device is far away from the vehicle-mounted device, that is, when there is a high possibility that the unlocking permission operation is not due to the user's intention, the unlocking of the electronic lock of the vehicle can be prohibited. Further, by using the identification information of different radio communication base stations depending on the current location of the vehicle, forgery and use of the identification information necessary for unlocking the vehicle can be made difficult, and theft of the vehicle can be prevented.

An example of a block diagram showing the configuration of a vehicle locking system An example of a flowchart showing details of processing executed by the microcomputer 12 and the ECU 24 An example of a flowchart showing details of processing executed by the microcomputer 12 and the ECU 24 The figure which shows operation | movement of the locking system for vehicles in case a portable machine and vehicle equipment exist in the relatively close position The figure which shows operation | movement of the locking system for vehicles when a portable machine and vehicle equipment exist in a comparatively distant position

  Hereinafter, a vehicle locking system 100 according to an embodiment of the present invention will be described. First, the configuration of the vehicle locking system 100 will be described with reference to FIG. FIG. 1 is an example of a block diagram showing the configuration of the vehicle locking system.

  As shown in FIG. 1, the vehicle locking system 100 includes a portable device 1 and an in-vehicle device 2 that perform wireless communication with each other. The in-vehicle device 2 is mounted on the vehicle 200. The vehicle 200 is equipped with a door lock device 201 controlled by the vehicle-mounted device 2.

  The portable device 1 is a terminal device that can be carried by a user, and is a so-called electronic key for controlling and operating the operation permission / prohibition of an in-vehicle device such as a door lock device 201 mounted on the vehicle 200. The portable device 1 includes a switch 11, a microcomputer 12, a portable transmission antenna 13, a portable reception antenna 14, and a portable wireless LAN antenna 15.

  The switch 11 is an input device that accepts a user input operation, and is typically a push-down switch. The switch 11 outputs an operation signal corresponding to the user's input operation to the microcomputer 12. The user can instruct unlocking of the door lock device 201 by performing a predetermined input operation on the switch 11.

  The portable transmission antenna 13 is an antenna device that transmits a radio signal in response to an instruction from the microcomputer 12. The portable receiving antenna 14 is an antenna device that receives a radio signal from the in-vehicle device 2 and transmits the signal to the microcomputer 12. The portable wireless LAN antenna 15 is an antenna device that receives a radio wave signal transmitted from the wireless LAN base station 3 and transmits the signal to the microcomputer 12.

  The microcomputer 12 is a control device including an information processing device such as a CPU (Central Processing Unit), a storage device such as a memory, and an interface circuit. The microcomputer 12 performs processing shown in FIGS. 2 and 3 to be described later on the basis of the signal received via the portable receiving antenna 14 and the portable wireless LAN antenna 15 and the input signal from the switch 11, and wireless communication according to the processing result is performed. The signal is transmitted to the in-vehicle device 2 via the portable transmission antenna 13.

  The in-vehicle device 2 is a control device that is mounted on the main body of the vehicle 200 and controls the operation of the in-vehicle device such as the door lock device 201 according to communication processing with the portable device 1. The in-vehicle device 2 includes an in-vehicle reception antenna 21, an in-vehicle transmission antenna 22, an in-vehicle wireless LAN antenna 23, and an ECU 24. The vehicle 200 further includes a door lock device 201.

  The in-vehicle receiving antenna 21 is an antenna device that receives a radio signal from the portable device 1 and transmits the signal to the ECU 24. The in-vehicle transmission antenna 22 is an antenna device that transmits a radio signal in response to an instruction from the ECU 24. The in-vehicle wireless LAN antenna 23 is an antenna device that receives a radio wave signal transmitted from the wireless LAN base station 3 and transmits the signal to the ECU 24.

  The ECU 24 is a control device that includes an information processing device such as a CPU, a storage device such as a memory, and an interface circuit. The ECU 24 performs processing described in FIGS. 2 and 3 to be described later on the basis of the received operation signal via the in-vehicle receiving antenna 21 and the in-vehicle wireless LAN antenna 23, so that the portable device 1 through the in-vehicle transmission antenna 22. A wireless signal is transmitted to the door, and the door lock device 201 is unlocked and prohibited.

  In addition, it is preferable that the mobile transmission antenna 13 and the vehicle-mounted reception antenna 21 communicate in the frequency band F1, and the mobile reception antenna 14 and the vehicle-mounted transmission antenna 22 communicate in the frequency band F2 different from the frequency band F1. Moreover, it is preferable that both frequency bands F1 and F2 are different from the frequency band generally used for wireless LAN. By setting the communication frequency band of the case antenna in this way, radio signal interference can be prevented.

  The door lock device 201 is an electronic locking device for a door provided in the vehicle 200. The door lock device 201 is a device that switches between unlocking and locking states of the door of the vehicle 200 according to a control signal or the like input from the ECU 24.

  The wireless LAN base station 3 is a communication device that performs wireless communication with a wireless LAN terminal. As shown in FIGS. 4 and 5 to be described later, the wireless LAN base station 3 transmits a wireless LAN signal including ID information of the base station as identification information unique to the own station within the communication range of the own station.

  Next, processing executed by the microcomputer 12 and the ECU 24 will be described with reference to FIGS. 2 and 3 are examples of flowcharts showing details of processing executed by the microcomputer 12 and the ECU 24. FIG. Note that the processing executed by the microcomputer 12 is referred to as portable device processing, and is referred to as on-vehicle device processing executed by the ECU 24. Note that the microcomputer 12 and the ECU 24 repeatedly execute the processes shown in FIGS. 2 and 3 while power is supplied from a battery or the like.

  The ECU 24 first determines whether or not the vehicle 200 is in a parked state when starting the in-vehicle device processing (step A1). An arbitrary method may be used as a method for the ECU 24 to determine whether or not the vehicle 200 is in a parked state. For example, the ECU 24 determines that the vehicle 200 is in a parked state when the vehicle speed of the vehicle 200 is 0, and determines that the vehicle 200 is not in a parked state when the vehicle speed of the vehicle 200 is greater than 0. When the vehicle 200 is parked (Yes in Step A1), the ECU 24 periodically transmits a request signal to the surroundings of the vehicle 200 via the in-vehicle transmission antenna 22 (Step A2). Further, when the vehicle 200 is in the parking state, the ECU 24 detects a wireless LAN signal that propagates around the vehicle 200 (step A3). Then, the ECU 24 stores the ID information of the wireless LAN base station 3 included in the wireless LAN signal detected in step A3 in the storage device of the ECU 24 as an in-vehicle device acquisition ID (step A4). When there are a plurality of wireless LAN base stations around the vehicle-mounted device 2 and a plurality of wireless LAN signals transmitted by each wireless LAN base station are detected, the ECU 24 is included in each of the detected wireless LAN signals. All the ID information to be stored is stored in the storage device. When the ECU 24 completes the process of step A4, the process proceeds to step A6.

  On the other hand, when the parking state of the vehicle 200 is released, that is, when the vehicle 200 is in a traveling state (No in Step A1), the ECU 24 initializes the vehicle-mounted device acquisition ID stored in the storage device of the ECU 24 in the process described later. (Step A5). And ECU24 initializes vehicle equipment acquisition ID, returns a process to step A1, and waits until the vehicle 200 will be in a parking state.

  Note that the processing of step A3 and step A4 for detecting the wireless LAN signal and storing the ID information is executed at predetermined time intervals (for example, every 10 minutes) while the vehicle 200 is in the parking state. Also good.

  Turning to the description of the portable device processing, when the microcomputer 12 receives a request signal from the vehicle-mounted device 2 via the portable receiving antenna 14 (Yes in Step B1), the microcomputer 12 carries the wireless LAN signal propagating around the portable device. Detection is performed via the wireless LAN antenna 15 (step B3). Even if the microcomputer 12 has not received a request signal (No in step B1), the microcomputer 12 detects a wireless LAN signal if it has received an operation signal from the switch 11 (Yes in step B2). (Step B3). Then, the microcomputer 12 sequentially stores the ID information of the wireless LAN base station 3 included in the wireless LAN signal detected in step B3 as a portable device acquisition ID in a storage device, and a signal indicating the portable device acquisition ID is mounted on the vehicle. Wireless transmission is performed to the device 2 via the portable transmission antenna 13 (step B4). When there are a plurality of wireless LAN base stations around the vehicle-mounted device 2 and a plurality of wireless LAN signals transmitted from each wireless LAN base station are detected, the microcomputer 12 detects all the detected wireless LAN signals. The ID information included in the mobile device is sequentially acquired as a mobile device acquisition ID, and the mobile device acquisition ID is sequentially transmitted to the in-vehicle device 2 in the acquired order. If the microcomputer 12 has not received the request signal (No in Step B1) and has not received the input signal from the switch 11 (No in Step B2), Steps B3 and B4 are performed. The process is skipped and the process proceeds to step B5.

  According to the processing from Step B1 to Step B4, the timing for detecting the wireless LAN signal is set to one of timing when the switch 11 is operated by the user and when the request signal is received from the in-vehicle device 2. Can do. Therefore, the microcomputer 12 can perform the process of detecting the wireless LAN signal only when necessary, and can suppress the battery consumption of the portable device 1.

  Returning to the description of the in-vehicle device processing, in step A6, the ECU 24 determines whether or not a radio signal indicating the portable device acquisition ID has been received. When the ECU 24 receives the wireless signal indicating the portable device acquisition ID (Yes in step A6), the ECU 24 determines whether or not the received portable device acquisition ID matches the in-vehicle device acquisition ID stored in the storage device (step A7). ). And when portable machine acquisition ID and vehicle equipment acquisition ID correspond, ECU24 sets the operation mode of the door lock apparatus 201 to unlock permission mode (step A8). Specifically, the ECU 24 holds flag data that sets the operation mode of the door lock device 201 to the unlock permission mode in the storage device. On the other hand, when the portable device acquisition ID does not match the vehicle equipment acquisition ID, the ECU 24 sets the operation mode of the door lock device 201 to the unlock prohibition mode (step A9). Specifically, the ECU 24 deletes flag data that sets the operation mode of the door lock device 201 as the unlock permission mode in the storage device. When the ECU 24 completes the processes of step A8 and step A9, the process proceeds to step A10. If the ECU 24 has not received a wireless signal indicating the portable device acquisition ID (No in step A6), the ECU 24 skips the processing from step A7 to step A9 and advances the processing to step A10.

  In the process of step A7, when determining whether or not the portable device acquisition ID matches the onboard device acquisition ID, the ECU 24 stores a plurality of ID information as the onboard device acquisition ID. When a predetermined number or more (for example, two or more) of vehicle-mounted device acquisition IDs match the portable device acquisition ID, it may be determined that the portable device acquisition ID matches the vehicle-mounted device acquisition ID. According to such processing, unnecessary unlock permission can be prevented more reliably. Further, when determining whether or not the portable device acquisition ID matches the vehicle equipment acquisition ID, if a plurality of ID information is stored as the vehicle equipment acquisition ID, at least one ID information matches. At the time, it may be determined that the portable device acquisition ID and the in-vehicle device acquisition ID match. According to such processing, the processing speed for detecting the wireless LAN signal can be shortened, and the response speed to the user's operation on the switch 11 can be increased.

  Returning to the description of the portable device processing, in step B5, the microcomputer 12 determines whether or not an unlocking operation from the user has been accepted. Specifically, the microcomputer 12 receives an input signal from the switch 11 and determines whether or not the input signal indicates an unlocking operation. If the microcomputer 12 has received an input to the switch 11 at the time of step B2, the microcomputer 12 determines in step B5 whether or not the operation signal received at that time indicates an unlocking operation. If the microcomputer 12 determines that an unlocking operation from the user has been received (Yes in step B5), the microcomputer 12 transmits an unlocking request signal from the portable transmission antenna 13 (step B6). When the microcomputer 12 completes the process of step B6, it returns the process to step B1. If the microcomputer 12 determines that an unlocking operation from the user has not been accepted (No in step B5), the microcomputer skips the process in step B6 and returns the process to step B1.

  Returning to the description of the in-vehicle device processing, in step A10, the ECU 24 determines whether or not an unlock request signal has been received. In addition to the switch 11, when the vehicle 200 door knob or the like is provided with a touch sensor (not shown) that accepts a user's touch input and accepts an unlocking operation, the ECU 24 sends the touch sensor to the touch sensor in step A10. Is detected as an unlock request signal. When it is determined that the unlock request signal has been received (Yes in Step A10), the ECU 24 determines whether or not the operation mode is set to the unlock permission mode (Step A11). When the operation mode is set to the unlock permission mode (Yes in Step A11), the ECU 24 transmits an instruction signal for unlocking the door lock device 201 to the door lock device 201 (Step A12). On the other hand, when the operation mode is set to the unlock prohibition mode (No in Step A11), the ECU 24 returns the process to Step A1 without unlocking the door lock device 201 (omitting Step A12). . If the ECU 24 has not received the unlock request signal (No in Step A10), the processing of Steps A11 and A12 is omitted, and the processing returns to Step A1.

  Next, the operation of the vehicle locking system will be described with reference to FIGS. 4 and 5. FIG. 4 is a diagram illustrating the operation of the vehicle locking system when the portable device 1 and the in-vehicle device 2 are located at relatively close positions. FIG. 5 is a diagram illustrating the operation of the vehicle locking system when the portable device 1 and the in-vehicle device 2 are located at relatively distant positions. 4 and 5, a plurality of wireless LAN base stations 3A, 3B, and 3C are arranged. Here, areas where the wireless LAN base stations 3A, 3B, and 3C can transmit wireless LAN signals are indicated as areas RA, RB, and RC, respectively. The ID information of the wireless LAN base stations 3A, 3B, and 3C is represented as α, β, and γ, respectively.

  As shown in FIG. 4, a case is assumed where the portable device 1 and the vehicle-mounted device 2 exist at relatively close positions. When the portable device 1 and the in-vehicle device 2 are located at relatively close positions, the portable device 1 and the in-vehicle device 2 both receive a wireless LAN signal from the same wireless LAN base station. In the case shown in FIG. 4, since the portable device 1 receives wireless LAN signals transmitted from the wireless LAN base stations 3A and 3B, the portable device acquisition IDs acquired by the portable device 1 are two, α and β. Become. Similarly, since the in-vehicle device 2 receives wireless LAN signals transmitted from the wireless LAN base stations 3A and 3B, the in-vehicle device acquisition IDs acquired in the in-vehicle device 2 are two, α and β. As described above, in the situation as shown in FIG. 4, the portable device acquisition ID matches the vehicle-mounted device acquisition ID, so that the operation of the door lock device 201 is set to the unlock permission mode.

  On the other hand, as shown in FIG. 5, the case where the portable device 1 and the vehicle-mounted device 2 exist in relatively distant positions is assumed. When the portable device 1 and the vehicle-mounted device 2 are located at relatively distant positions, the portable device 1 and the vehicle-mounted device 2 receive wireless LAN signals from different wireless LAN base stations. In the case shown in FIG. 5, since the portable device 1 receives wireless LAN signals transmitted from the wireless LAN base stations 3A and 3B, the portable device acquisition IDs acquired by the portable device 1 are two, α and β. Become. On the other hand, since the in-vehicle device 2 receives the wireless LAN signal transmitted from the wireless LAN base station 3C, the in-vehicle device acquisition ID acquired in the in-vehicle device 2 is only γ. Thus, since the portable device acquisition ID does not match the vehicle-mounted device acquisition ID in the situation shown in FIG. 5, the operation of the door lock device 201 is set to the unlock prohibited mode.

  As described above, according to the vehicle locking system 100 according to the embodiment of the present invention, the unlocking permission of the vehicle door lock can be appropriately controlled. Specifically, when the user is in the vicinity of the vehicle, that is, when the user intentionally performs an unlocking operation or is highly likely to be unlocked, unlocking can be permitted. On the other hand, when the user is far away from the vehicle, that is, when an unlocking operation unintended by the user is performed or is likely to be performed, unlocking can be prohibited. Further, by using the ID information of the wireless LAN base station 3 that differs depending on the current location of the vehicle 200, it becomes difficult to forge and use the identification information necessary for unlocking the door lock device 201 and prevent the vehicle 200 from being stolen. can do.

  In the above embodiment, the example in which the portable device 1 and the vehicle-mounted device 2 acquire ID information as identification information unique to the wireless LAN base station 3 has been described. However, if the identification information is unique to the wireless LAN base station 3, ID information is used. Not limited to this, other information may be used. For example, the portable device 1 and the vehicle-mounted device 2 may extract the content of a predetermined bit string from the ID information and use it in the same manner as the ID information described above. By performing such processing, the amount of data to be used can be reduced, and the storage area and processing amount required for the microcomputer 12 and the ECU 24 can be reduced.

  In the above embodiment, an example in which a wireless signal transmitted from a wireless LAN base station is used has been described. However, in the present invention, a signal transmitted from a base station installed for each land and including unique identification information may be used. Any radio signal can be used.

  Further, in the above embodiment, in order to facilitate understanding of the present invention, an example of controlling the permission and non-permission of unlocking based only on ID information unique to the wireless LAN base station has been described. Can be used together with the lock control technology by the conventional portable device and in-vehicle device. For example, in addition to the ID unique to the wireless LAN base station, the ID information held by the portable device and the vehicle-mounted device may be used together to control the permission and non-permission of unlocking. Furthermore, when the portable device and the in-vehicle device communicate, encryption verification using the ID information as described above may be performed. Thus, by using this invention together with the conventional lock control technology, it is possible to obtain a vehicle locking system with higher security, which is preferable.

  The vehicular locking system according to the present invention is useful as a vehicular locking system that enables appropriate control of unlocking permission and prohibition of a door lock of a vehicle.

DESCRIPTION OF SYMBOLS 100 Locking system for vehicles 1 Portable machine 11 Switch 12 Microcomputer 13 Portable transmitting antenna 14 Portable receiving antenna 15 Portable wireless LAN antenna 2 In-vehicle device 21 In-vehicle receiving antenna 22 In-vehicle transmitting antenna 23 In-vehicle wireless LAN antenna 24 ECU
200 Vehicle 201 Door lock device 3 Wireless LAN base station

Claims (1)

A vehicle locking system comprising: a portable device that can be carried by a user; and an in-vehicle device that controls permission and prohibition of unlocking an electronic lock of the vehicle,
The portable device is
First identification information acquisition means for acquiring identification information unique to the base station transmitted by a wireless communication base station existing in the surroundings as portable device acquisition identification information;
Portable device acquisition identification information transmission means for transmitting the portable device acquisition identification information acquired by the identification information acquisition means to the in-vehicle device,
The in-vehicle device is
Second identification information acquisition means for acquiring identification information unique to the base station transmitted by wireless communication base stations existing in the surroundings as in-vehicle device acquisition identification information;
Portable device acquisition identification information receiving means for receiving portable device acquisition identification information transmitted from the identification information transmitting means;
Identification information determination means for determining whether or not the portable device acquisition identification information and the in-vehicle device acquisition identification information match;
When the portable device acquisition identification information and the in-vehicle device acquisition identification information match, the unlocking of the electronic lock is permitted, and when the portable device acquisition identification information and the in-vehicle device acquisition identification information do not match, the electronic A vehicle locking system comprising: an unlocking permission control means for prohibiting unlocking of the lock.

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