JP5098545B2 - Smart keyless entry system - Google Patents

Description

  The present invention belongs to a technical field related to a smart keyless entry system.

  Conventionally, wireless communication is performed between an in-vehicle device and a portable device, and an ID signal is transmitted from the portable device in response to a request signal transmitted from the in-vehicle device to a transmission scheduled area. A smart keyless entry system is known in which a door lock mechanism is operated to lock / unlock a vehicle door based on whether or not signal authentication is established (see, for example, Patent Document 1). In this system, after the vehicle door is closed, the vehicle authentication condition is not satisfied from the state in which the mobile phone authentication condition in which the in-vehicle device receives the ID signal from the portable device and obtains the authentication is satisfied. When switched (when the door lock condition is established), it is assumed that the occupant carrying the portable device has moved out of the area to be transmitted from the area scheduled for transmission (assuming that the occupant is getting off the vehicle and leaving the vehicle) When the vehicle door is locked while the mobile authentication condition is not satisfied and the mobile authentication condition is satisfied (when the door unlock condition is satisfied), the occupant who has the mobile device transmits the above-mentioned scheduled transmission area. The vehicle door is unlocked on the assumption that the vehicle has moved into the area from outside (assuming that the occupant is about to get into the vehicle).

Further, as this type of system, a touch sensor capable of locking / unlocking a vehicle door is provided, and the touch sensor is effectively operated when the door lock / unlock condition is satisfied. (For example, refer to Patent Document 2). In this system, when the lock / unlock condition is satisfied, the vehicle door is locked / unlocked with the intention of the occupant operating the touch sensor, so that the occupant is surely locked (or unlocked) the vehicle door. The system can be used without feeling uneasy about whether or not it is.
Japanese Patent Laid-Open No. 10-25939 JP 2006-9912 A

  However, in the smart keyless entry system shown in Patent Document 1 described above, if the transmission area of the request signal is set to be narrow, for example, when a passenger carrying a portable device is about to hurry away from the vehicle, the vehicle When the door is closed, the occupant (mobile device) has already moved out of the scheduled transmission area and the mobile authentication condition is not satisfied, so that the mobile authentication condition is not satisfied from the state where the mobile authentication condition is satisfied. The above door lock condition of switching does not hold, and as a result, there arises a problem that the vehicle door is not locked even though the occupant moves away from the vehicle and moves outside the scheduled transmission area.

  Therefore, it is conceivable to set the transmission planned area widely in advance. In this case, the time until the occupant (mobile device) leaves the transmission planned area outside the transmission planned area, that is, the mobile authentication condition is satisfied. There is a problem in that it takes a long time until the vehicle is not established, and as a result, the vehicle door is not easily locked and anxiety is given to the occupant. For example, as shown in Patent Document 2, it is conceivable to provide a touch sensor so that the vehicle door is securely locked by the occupant's intention. In this case, the touch sensor is operated on the occupant. It gives you a feeling of bothering that you have to.

  The present invention has been made in view of such a point, and an object of the present invention is to give an uneasiness to the occupant even when, for example, the occupant is about to get out of the vehicle and leave. Therefore, an object of the present invention is to provide a smart keyless entry system that can securely and easily lock a vehicle door.

  In order to achieve the above object, in the present invention, a transmission scheduled area of a request signal transmitted from an in-vehicle device includes a first predetermined area outside the vehicle door and the first predetermined area, and the first predetermined area. It is possible to set by switching to a wider second predetermined area, and immediately after the vehicle door is switched from the open state to the closed state, the transmission scheduled area is set to the wider second predetermined area, and then When authentication of the ID signal of the portable device is obtained in the in-vehicle device, the transmission scheduled area is set by switching to the narrower first predetermined area, and then the ID signal of the portable device is not authenticated in the in-vehicle device. When it became possible, the door lock mechanism was activated to lock the vehicle door.

Specifically, in the invention of claim 1, the vehicle-mounted device that is mounted on the vehicle and transmits the request signal to the transmission scheduled area, and the passenger carries the ID when receiving the request signal from the vehicle-mounted device. A portable device for transmitting a signal; and door opening / closing detection means for detecting an opening / closing state of the door of the vehicle, wherein the in-vehicle device is based on door opening / closing information from the door opening / closing detection means. When the switching from the closed state to the closed state is detected, the in-vehicle device receives the ID signal from the portable device, and the ID code in the ID signal matches the identification code stored in the in-vehicle device in advance. Based on whether or not the portable authentication condition is satisfied, the operation of the door lock mechanism of the vehicle is controlled , and the portable authentication is performed after the in-vehicle device detects the switching of the door from the open state to the closed state. The condition is met When the state of the portable authentication condition is switched to the state not satisfied, the smart keyless entry system the occupant to lock as being away and gets off from the vehicle, the door by operating the door lock mechanism Is targeted.

  And the said vehicle equipment includes the said predetermined signal transmission plan area including the 1st predetermined area outside the door of the said vehicle, and this 1st predetermined area, and is wider than this 1st predetermined area When switching from the open state to the closed state of the door is detected, the scheduled transmission area is set as the second predetermined area and the setting is enabled. When the mobile authentication condition is satisfied later, the scheduled transmission area is switched to the first predetermined area. When the mobile authentication condition is not satisfied after the switching, the door lock mechanism is operated to lock the door. It shall be comprised so that it may do.

  According to the above configuration, when the in-vehicle device detects that the vehicle door (hereinafter referred to as a vehicle door) is switched from an open state to a closed state, the on-vehicle device sets the request signal transmission scheduled area to the second predetermined area. Set to. Then, when the mobile authentication condition is satisfied after the setting, that is, when a regular mobile device exists in the second predetermined area, the transmission scheduled area is switched to the first predetermined area. Furthermore, after the switching, when the mobile authentication condition is not satisfied, that is, when the in-vehicle device does not receive the ID signal from the mobile device or receives the ID signal, the authentication is not obtained. When there is no legitimate portable device in the area, the vehicle-mounted device operates a door lock mechanism to lock the vehicle door.

  Whether or not the vehicle door is securely locked to the occupant even when the occupant carrying the portable device suddenly gets off and leaves the vehicle by the operation control of the door lock mechanism by the in-vehicle device. Without giving such anxiety, the vehicle door can be locked by operating the door lock mechanism quickly and surely.

  That is, in the conventional smart keyless entry system, after the vehicle door is closed, the occupant (mobile device) moves outside the scheduled transmission area from the state where the occupant (mobile device) exists in the planned transmission area and the portable authentication condition is satisfied. When the vehicle authentication condition is not satisfied, the vehicle door is locked as if the occupant got off the vehicle and moved away, but in this case, if the transmission planned area is wide, Since it takes time for the occupant to move out of the scheduled transmission area, the vehicle door is not easily locked, which results in an uneasiness to the occupant. Also, if the planned transmission area is small, the occupant rushes, for example. When the vehicle is about to leave the vehicle, the occupant has already gone out of the scheduled transmission area after the vehicle door is closed, and the mobile authentication condition can be satisfied. Become a have state, and as a result, there is a problem that the vehicle door is not locked.

  However, in the present invention, as described above, immediately after the on-vehicle device detects that the vehicle door is switched from the open state to the closed state, the transmission scheduled area is set to the wider second predetermined area. Therefore, even if an occupant (mobile device) is about to leave the vehicle in a hurry, the request signal is reliably transmitted to the mobile device and the ID signal from the mobile device is reliably received by the in-vehicle device. In other words, the portable authentication condition can be established. On the other hand, after the portable authentication condition is established, the transmission scheduled area is switched to the first predetermined area which is narrower, so that the occupant transmits It is possible to shorten the time until the mobile phone authentication condition is not satisfied after going out of the scheduled area, that is, the time until the door lock mechanism is activated. Therefore, the vehicle door can be locked quickly and reliably after the occupant gets out of the vehicle, so that the passenger does not feel uneasy about whether or not the door is securely locked.

  According to a second aspect of the invention, in the first aspect of the invention, after the on-vehicle device detects the switching of the door of the vehicle from the open state to the closed state and sets the scheduled transmission area as the second predetermined area. When the mobile authentication condition is satisfied, it is further provided with notifying means for notifying the passenger to that effect.

  Thus, when the portable authentication condition is satisfied after the vehicle-mounted device detects that the vehicle door is switched from the open state to the closed state, the notification means notifies the passenger. Accordingly, when the occupant gets off the vehicle and moves away from the vehicle, the ID signal from the portable device owned by the occupant is reliably received by the in-vehicle device and the authentication is obtained (the portable authentication condition is satisfied). Can be known by notification from the notification means. Therefore, the occupant can obtain a sense of security by knowing that the smart keyless entry system is surely operating to lock the vehicle door.

  According to a third aspect of the invention, in the first or second aspect of the invention, the in-vehicle device has switched the scheduled transmission area from the second predetermined area to the first predetermined area, and then a predetermined time has elapsed since the switching. In some cases, the door lock mechanism is operated to lock the vehicle door regardless of whether the portable authentication condition is satisfied.

  According to this configuration, the in-vehicle device determines whether or not the mobile authentication condition is satisfied when a predetermined time has elapsed after switching the transmission scheduled area from the second predetermined area to the first predetermined area. Regardless, the door lock mechanism is activated to lock the vehicle door. Accordingly, the vehicle door can be locked even if the occupant carrying the portable device stays in the first predetermined area after leaving the vehicle and the portable authentication condition is still established. It is possible to prevent anxiety from being felt because the vehicle door is not locked even though the vehicle is out.

  According to a fourth aspect of the invention, in the invention according to any one of the first to third aspects, the in-vehicle device is configured to transmit the request signal by LF band magnetic field transmission, and the portable device is configured to transmit a radio wave in the UHF band. It is assumed that the ID signal is transmitted by transmission.

  By doing so, wireless communication (transmission / reception of request signals and ID signals) between the portable device and the vehicle-mounted device can be reliably performed while removing the influence of noise and the like.

  As described above, according to the smart keyless entry system of the present invention, when an occupant carrying a portable device gets off the vehicle and leaves the vehicle, the vehicle does not give a sense of anxiety or annoyance to the occupant. The door can be reliably and easily locked.

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

  FIG. 1 shows a schematic configuration of a smart keyless entry system of a vehicle A (see FIG. 2) according to an embodiment of the present invention. This system includes a keyless control unit (on-vehicle device) 1 that controls the entire smart keyless entry system, a portable device 2 carried by an occupant, and a door lock device 3, as will be described later. 1 is a system that locks / unlocks the vehicle door 20 by operating the door lock device 3 without performing key operations by performing communication between the mobile phone 1 and the portable device 2.

  Each of the keyless control unit 1 and the portable device 2 includes a transmitter / receiver (not shown), so that the keyless control unit 1 and the portable device 2 perform wireless bidirectional communication. Specifically, the keyless control unit 1 transmits a request signal in a later-described transmission planned area at a predetermined timing, whereas the portable device 2 transmits a reception confirmation signal when receiving the request signal, to the keyless control unit 1. Send to. Here, an authentication code is stored in the portable device 2, and the portable device 2 transmits a reception confirmation signal (ID signal) including the authentication code to the keyless control unit 1. In this embodiment, the reception confirmation signal is a UHF band signal, while the request signal is an LF band signal.

  The keyless control unit 1 performs the following mobile authentication determination based on the authentication code included in the reception confirmation signal from the mobile device 2. That is, when the control unit 1 receives the reception confirmation signal from the portable device 2 and the identification code stored in advance matches the authentication code transmitted from the portable device 2 (hereinafter, the portable authentication condition is satisfied). When the authentication code does not match the identification code, or when the portable device 2 is outside the scheduled transmission area and the portable device 2 When the reception confirmation signal cannot be received (when the reception confirmation signal cannot be transmitted because the portable device 2 cannot receive the request signal), it is determined that the authentication code has not been authenticated.

  As will be described later, the scheduled transmission area of the request signal transmitted from the keyless control unit 1 is set by the control unit 1 based on the result of the mobile authentication determination. In the present embodiment, the keyless control unit 1 includes the first predetermined area 31 (see FIG. 2) outside the vehicle door 20 of the driver's seat 21 of the vehicle A and the first predetermined area 31 as the scheduled transmission area. The first predetermined area 31 is set within a radius of about 0.8 to 1.0 m, and the second predetermined area 32 has a radius of about 1.5. It is set within a range of ~ 2.0 m. In other words, it can be said that the keyless control unit 1 is configured to switch the transmission output of the request signal between the small output state corresponding to the first predetermined area 31 and the large output state corresponding to the second predetermined area 32. .

  Further, as shown in FIG. 1, the keyless control unit 1 includes a door switch 41 that is a switch that detects the opening and closing of a door, an ignition switch 42 that is a switch that detects an operation of the ignition, and a vehicle door 20. The door lock device 3 for locking / unlocking (in this embodiment, the door of the driver's seat 21) and the confirmation sound generating device 4 for generating a buzzer sound are connected. When the occupant carrying the portable device 2 is about to get off the vehicle A and leave, the keyless control unit 1 receives the input information from the switches 41 and 42 and the reception confirmation from the portable device 2. On the basis of the result of the portable authentication determination based on the signal, the door lock control for automatically locking the vehicle door 20 regardless of the key operation of the occupant is executed, while the occupant carrying the portable device 2 approaches the vehicle A. When coming, door unlock control for automatically unlocking the vehicle door 20 is executed.

  Specifically, when the keyless control unit 1 detects that the vehicle door 20 is switched from the open state to the closed state based on the door opening / closing information from the door switch 41, the keyless control unit 1 sets the transmission area for the request signal. When it is set in the second predetermined area 32 and it is determined that the portable authentication condition is satisfied after the setting, the transmission scheduled area of the request signal is switched to the first predetermined area 31, and the portable authentication is performed after the switching. When it is determined that the condition is not satisfied, the door lock control is executed by operating the door lock device 3 to lock the vehicle door 20.

  The keyless control unit 1 fixes the transmission scheduled area to the first predetermined area 31 without switching the transmission scheduled area when the door unlock control is executed. When the keyless control unit 1 detects that the closed state of the vehicle door 20 is detected by the door switch 41, the keyless control unit 1 detects that the mobile authentication condition has been switched from an unestablished state to an established state. The door unlock control is executed by operating the lock device 3 to unlock the vehicle door 20.

  Next, the door lock control in the keyless control unit 1 will be described with reference to the flowchart of FIG.

  First, in step S1, it is determined whether or not the ignition is OFF based on the input information from the ignition switch 42. If this determination is YES, the process proceeds to step S2. If NO, Performs the process of step S1 again.

  In step S2, it is determined based on the door opening / closing information from the door switch 41 whether or not the switching of the vehicle door 20 from the open state to the closed state is detected. If this determination is YES, the process proceeds to step S3. If NO, the process of step S2 is performed again.

  In step S3, the output of the request signal is increased in order to expand the transmission scheduled area of the request signal (LF signal) output from the transceiver from the first predetermined area 31 to the second predetermined area 32.

  In step S4, a mobile authentication determination as to whether or not the mobile authentication condition is satisfied is executed. If this determination is YES, the process proceeds to step S5, and if NO, the process returns.

  In step S5, an operation command is issued to the confirmation sound generator 4 in order to inform the occupant that the portable authentication condition has been established. The confirmation sound is a buzzer sound in the present embodiment, but may be a sound, for example.

  In step S6, the output of the request signal is reduced in order to reduce the transmission scheduled area of the request signal (LF signal) output from the transceiver to the first predetermined area 31 from the second predetermined area 32.

  In step S7, the mobile authentication determination is executed. If this determination is YES, the process proceeds to step S9, and if NO, the process proceeds to step S8.

  In step S8, the door lock device 3 is operated to lock the vehicle door 20.

  In step S9, it is determined whether or not a predetermined time (for example, 30 seconds) has elapsed after the request signal is switched to the small output in step S6. If this determination is YES, the process of step S8 is executed. In this case, the process returns to step S7.

  As described above, in the above-described embodiment, the keyless control unit 1 includes the first predetermined area 31 outside the vehicle door 20 of the vehicle A, the first predetermined area 31, and the first predetermined area 31. Switching to the second predetermined area 32 wider than the predetermined area 31 can be set, and based on the door opening / closing information from the door switch 41, the switching of the vehicle door 20 from the open state to the closed state is detected. When the determination is made (when the determination in step S2 is YES), the output of the request signal (LF signal) is set to a large output to set the planned transmission area to the second predetermined area 32 (the process of step S3 is executed). When the mobile authentication condition is satisfied after the setting (when the determination in step S4 is YES), the request signal transmission scheduled area is switched to the first predetermined area 31. If possible, the output of the request signal (LF signal) is set to a small output (the process of step S6 is executed), and the portable authentication condition is not satisfied after the switching (when the determination of step S7 is NO) The door lock device 3 is activated to lock the vehicle door 20 (the process of step S8 is executed).

  In this way, immediately after the passenger gets off the vehicle A and closes the vehicle door 20, the keyless control unit 1 sets the second predetermined area 32, which is a wider area, as a scheduled transmission area. Even when the vehicle is rushing away from the vehicle A, it is possible to prevent the occupant (the portable device 2) from going out of the scheduled transmission area when the vehicle door 20 is closed. Therefore, it is possible to reliably prevent the door lock device 3 from being deactivated because the portable authentication condition is not satisfied immediately after the occupant (the portable device 2) leaves the vehicle A. In addition, once the mobile authentication condition is established once the occupant goes out of the vehicle, the keyless control unit 1 switches the setting to the first predetermined area 31 with the narrower transmission scheduled area. It is possible to shorten the time until the occupant goes out of the transmission scheduled area, that is, the time until the mobile authentication condition is not satisfied, and to activate the door lock device at an early stage. Accordingly, it is possible to prevent the passenger from feeling uneasy because the vehicle door 20 is not easily locked even though the passenger is about to leave the vehicle A.

  Further, in the above embodiment, the keyless control unit 1 detects that the portable authentication condition is satisfied after detecting the switching of the vehicle door 20 from the open state to the closed state (when the determination in step S4 is YES). ), An operation command is issued to the confirmation sound generating device 4 so as to notify the occupant to that effect (the process of step S5 is executed).

  Thus, when the occupant gets off the vehicle A and moves away, the reception confirmation signal (authentication code) from the portable device 2 possessed by the occupant is reliably received by the keyless control unit 1 and the authentication is obtained. (The mobile phone authentication condition is satisfied) can be known from the confirmation sound from the confirmation sound generator 4. Accordingly, the occupant can obtain a sense of security by knowing that the smart keyless entry system is surely operating and trying to lock the vehicle door 20.

  In the above embodiment, the keyless control unit 1 switches the transmission scheduled area from the second predetermined area 32 to the first predetermined area 31 (after executing the process of step S6). When a predetermined time has elapsed since the execution of the process of S6 (when the determination of step S9 is YES), the door lock device 3 is operated to determine whether or not the mobile authentication condition is satisfied and the vehicle door 20 is locked (the process of step S8 is executed).

Thereby, even when the passenger having the portable device 2 has left the first predetermined area 31 after getting out of the vehicle and the portable authentication condition remains established, when a predetermined time has passed (in this embodiment, When 30 seconds have elapsed after the execution of the process of step S6), the door lock mechanism 3 is activated and the vehicle door 20 is locked. For this reason, the vehicle door 20 is in spite of the occupant leaving the vehicle. In the above embodiment, the keyless control unit 1 is configured to transmit a request signal by magnetic field transmission in the LF band, and the portable device 2 is in the UHF band. A reception confirmation signal including an authentication code is transmitted by radio wave transmission.

  Thereby, transmission / reception of the request signal and the reception confirmation signal (authentication code) between the portable device 2 and the keyless control unit 1 can be reliably performed while removing the influence of noise and the like.

(Other embodiments)
The configuration of the present invention is not limited to the above embodiment, but includes various other configurations. That is, in the above-described embodiment, the scheduled transmission area is set only on the outside of the vehicle door 20 of the driver's seat 21, but is not limited to this, and is set on the outside of the other vehicle doors 22, for example. You may do it.

  The present invention includes an occupant portable device that transmits an ID signal in response to a request signal from an in-vehicle device mounted on a vehicle, and the in-vehicle device receives the ID signal from the portable device and the authentication is established. This is useful for a smart keyless entry system that activates a door lock device based on whether or not to do so, and is particularly useful for lock control of a vehicle door when an occupant carrying a portable device gets off the vehicle and moves away.

It is a block diagram which shows the structure of the smart keyless entry system which concerns on embodiment of this invention. It is a vehicle top view which shows typically the transmission plan area of the request signal transmitted from a keyless control unit. It is a flowchart which shows the door lock control in a keyless control unit.

A vehicle
1 Keyless control unit (vehicle equipment)
2 Mobile devices
3 Door lock device (door lock mechanism)
4 confirmation sound generator (notification means)
20 Vehicle door (vehicle door)
31 First predetermined area
32 2nd predetermined area 41 Door switch (door opening / closing detection means)

Claims (4)

A vehicle-mounted device that is mounted on a vehicle and that transmits a request signal within a transmission scheduled area, a portable device that is carried by an occupant and that transmits an ID signal when receiving a request signal from the vehicle-mounted device, and the vehicle door Door opening / closing detection means for detecting the opening / closing state of the vehicle, and when the on-vehicle device detects the switching of the vehicle door from the open state to the closed state based on the door opening / closing information from the door opening / closing detection means Based on whether or not a portable authentication condition is satisfied in which the in-vehicle device receives the ID signal from the portable device and the ID code in the ID signal matches the identification code stored in the in-vehicle device in advance. performs operation control of the door lock mechanism of the vehicle, the vehicle device in after detecting switched to the closed state from the open state of the door, the portable authentication condition is the portable authentication condition from a state which satisfies the FuNaru When switched to the condition to be in, as the occupant is away and gets off from the vehicle, a smart keyless entry system for locking the door by actuating the door lock mechanism,
The in-vehicle device switches the request signal transmission scheduled area between a first predetermined area outside the door of the vehicle and a second predetermined area that includes the first predetermined area and is wider than the first predetermined area. When the switching from the open state to the closed state of the door is detected, the transmission scheduled area is set as the second predetermined area, and the mobile authentication condition is satisfied after the setting. The transmission scheduled area is switched to the first predetermined area, and when the portable authentication condition is not satisfied after the switching, the door lock mechanism is activated to lock the door. Smart keyless entry system characterized by that. The smart keyless entry system according to claim 1,
After the vehicle-mounted authentication condition is satisfied after the vehicle-mounted device detects the switching from the open state of the vehicle door to the closed state and sets the scheduled transmission area to the second predetermined area, this fact is indicated. A smart keyless entry system, further comprising notification means for notifying an occupant. The smart keyless entry system according to claim 1 or 2,
The on-vehicle device switches the transmission scheduled area from the second predetermined area to the first predetermined area, and when a predetermined time has elapsed from the time of the switching, the vehicle-mounted device regardless of whether the mobile authentication condition is satisfied or not. A smart keyless entry system configured to operate a door lock mechanism to lock a door of the vehicle. In the smart keyless entry system according to any one of claims 1 to 3,
The in-vehicle device is configured to transmit the request signal by LF band magnetic field transmission,
The smart keyless entry system, wherein the portable device is configured to transmit the ID signal by UHF band radio wave transmission.

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