JP5508239B2 - Electronic key system - Google Patents

Description

  The present invention relates to an electronic key system in which a communication terminal having a key function can be used as a vehicle key in addition to a normal electronic key.

  Conventionally, as an electronic key system for a vehicle, a key operation-free system in which an ID signal is returned from an electronic key in response to a request signal transmitted from the vehicle, and ID verification of the electronic key is executed using an ID code included in the ID signal has been widely used. Have been doing. In this key operation free system, a request signal communication area is formed outside the vehicle with an outside transmitter, a request signal communication area is formed inside the vehicle with an inside transmitter, and an electronic key and ID verification are performed outside and inside the vehicle, respectively. To do. When the vehicle outside verification is established, door locking / unlocking is permitted or executed, and when the vehicle interior verification is established, the engine start operation is permitted.

  In this kind of key operation free system, a key misplacement prevention function is provided so that the door lock is not locked while the electronic key is misplaced in the vehicle. In this case, for example, when the lock button for locking the door lock provided on the door handle knob on the outside of the vehicle is pushed and the operation shifts to the lock operation of the door lock, transmission of the request signal from the in-vehicle transmitter is started, and the in-vehicle verification is performed. Whether or not the electronic key has been left in the vehicle is confirmed by checking whether or not is established. If there is no electronic key in the vehicle, the door lock is locked as it is, and if the electronic key exists in the vehicle, the user is notified that the key has been left behind, and the door lock does not shift to locking.

  As another type of electronic key system, a mobile phone key system has been devised in which a vehicle ID code is registered in a mobile phone and the mobile phone is used as a vehicle key (see Patent Document 1). For this system, for example, near field communication technology (communication distance of about 10 cm) such as Felica (registered trademark) is applied. Then, the mobile phone is held over a reader / writer installed in the vehicle, an ID code is acquired from the mobile phone, and the ID code is passed over the ID code for verification. Then, if the cover collation is established, door locking / unlocking and engine starting operation are permitted or executed.

  In the case of a cellular phone key system, an outside reader / writer is installed instead of the outside transmitter, and an inside reader / writer is installed instead of the inside transmitter. For example, if ID verification is established by holding the mobile phone from the outside of the vehicle through the door glass to the reader / writer outside the vehicle, door locking / unlocking is executed, and if ID verification is established by holding the mobile phone over the in-vehicle reader / writer. Engine start operation is permitted. When only one mobile phone is carried, a mobile phone is always required for the door lock operation, so that the mobile phone is not forgotten.

JP 2007-132085 A

  By the way, it is assumed that both the above-described key operation free system and the mobile phone key system are mounted on one vehicle. In this case, if you leave the mobile phone with the key function in the car and only get the electronic key and get off and move to the door lock operation, the electronic key taken out of the car will be verified and the electronic key will be in the car. Therefore, it is determined that there is no misplacement, so that the door lock is shifted to lock while the mobile phone remains in the vehicle. That is, the door lock is locked while leaving a kind of vehicle key called a mobile phone in the car.

  In this way, if you leave a mobile phone in the car, for example, if a door glass is cracked by a third party and it is illegally invaded, the engine will be started by the mobile phone that you have left in the car. It will be carried away by a third party. Therefore, there is a problem that security against vehicle theft when both the key operation free system and the mobile phone key system are mounted on the vehicle cannot be secured. This problem also applies to cases where only a mobile phone key system having a key function is installed and a plurality of mobile phones are held and one of them is left in the vehicle.

  The present invention has been made in view of such circumstances, and the purpose of the present invention is that even if a communication terminal having a key function is misplaced in the vehicle, the vehicle is illegally used by a third party or the like with the misplaced communication terminal. It is an object of the present invention to provide an electronic key system that can make it difficult for a situation to occur.

Hereinafter, means for achieving the above-described object and its operation and effects will be described.
In the present invention, ID verification can be performed via short-range wireless communication by a communication terminal, and if the ID verification is established, the communication terminal is granted to the communication terminal in an electronic key system that permits or executes an operation. Based on the detection result of the motion detection means, the determination means for determining whether or not the communication terminal exists in the vehicle, and when the door lock of the vehicle is locked, If the communication terminal remains misplaced in the vehicle, the invalidation means for invalidating at least the key function of the communication terminal and the communication signal transmitted from the communication terminal to the vehicle wirelessly by the detection signal detected by the motion detection means And the determination means obtains a detection signal of the motion detection means via the communication means, executes a determination of leaving the communication terminal in the vehicle on the vehicle side, and Shin means, wherein the ID verification is summarized in that to perform a communication with another system communication network.

  According to this configuration, when the door lock of the vehicle is locked, it is confirmed whether or not the communication terminal with a key function has been left behind in the vehicle. If the vibration of the communication terminal with the key function is not a detection result taken out of the vehicle, it is determined that the communication terminal with the key function is left in the vehicle, and the key function of the communication terminal is invalidated. Therefore, even if a communication terminal misplaced in the vehicle is stolen by a third party, the vehicle cannot be operated with this communication terminal, so that it is possible to ensure security against unauthorized use of the vehicle or vehicle theft.

  Further, in the same configuration, the motion given to the communication terminal is detected by the motion detection means, and whether or not the communication terminal is taken out of the vehicle is determined based on the vibration result of the motion detection means. By the way, when the communication terminal is taken out of the vehicle, a specific movement is taken as the user gets off. Therefore, as in this configuration, if the presence / absence of the communication terminal being taken out of the vehicle is determined from the movement of the communication terminal, it is possible to detect the takeout of the communication terminal out of the vehicle more accurately.

According to this configuration, since the determination of forgetting to place the communication terminal in the vehicle is executed on the vehicle side, it is not necessary to provide this determination function in the communication terminal. Therefore, the configuration of the communication terminal is not complicated .

  According to this configuration, since the detection signal is transmitted from the communication terminal to the vehicle through a communication network different from ID verification, the detection signal can be transmitted from the communication terminal to the vehicle without being affected by interference or the like. It becomes.

  In the present invention, ID verification is possible using the electronic key via narrow-area wireless communication, and if the ID verification is established on at least one of the electronic key and the communication terminal, the operation of the in-vehicle device is permitted or executed. The gist of this is.

  In the key system of the electronic key, when the door is locked from the outside of the vehicle, it is possible to determine whether the electronic key has been left in the vehicle by checking whether or not ID verification is established with the electronic key located in the vehicle. However, if you leave the communication terminal with the key function in the car and you only get the electronic key from the car and get off and lock the door lock, the electronic key will be left in the car because the in-vehicle verification will be established. If not, the door lock will be locked without problems. For this reason, since the communication terminal with a key function is left in the vehicle, it cannot be denied that the communication terminal is illegally taken and this may lead to vehicle theft.

  However, according to the above configuration, when the door lock is locked, it is confirmed whether or not the communication terminal with the key function is left in the vehicle by communication different from ID verification, and the communication terminal is left behind. In this case, the key function of the communication terminal is invalidated. That is, the communication terminal enters a key function invalidation state that cannot be used as a key. Therefore, even if a communication terminal with a key function that has been misplaced in the vehicle is illegally taken by a third party, the vehicle cannot be operated by this communication terminal, so that the vehicle is not illegally used.

The gist of the present invention is that the communication terminal is a mobile phone and the communication used by the communication means is Bluetooth communication.
According to this configuration, mobile phones in recent years tend to be equipped with a Bluetooth communication function, and this mobile phone is used as a vehicle key. Can be confirmed.

  In the present invention, after the communication terminal enters the invalidation state, if there is a release operation for canceling the invalidation, the invalidation release means for releasing the invalidation state and returning the key function of the communication terminal. The gist is that

According to this configuration, even if the key function of the communication terminal is disabled, the communication terminal that has entered the disabled state can be returned to the original state in which the key function is enabled.
In the present invention, the communication means starts acquisition of the detection result by connecting to a wireless system of another system triggered by unlocking the door lock or turning on the power of the vehicle, and the determining means includes the door of the vehicle The gist is to determine whether or not the communication terminal exists in the vehicle when the lock is locked.

According to this configuration, since the connection state is constantly monitored after bringing the communication terminal into the vehicle, it is possible to more accurately determine whether or not the communication terminal exists in the vehicle.
In the present invention, ID verification can be performed via short-range wireless communication by a communication terminal, and if the ID verification is established, the communication terminal is granted to the communication terminal in an electronic key system that permits or executes an operation. Based on the detection result of the motion detection means, the determination means for determining whether or not the communication terminal exists in the vehicle, and when the door lock of the vehicle is locked, If the communication terminal remains misplaced in the vehicle, the communication terminal includes a disabling unit that disables at least the key function of the communication terminal, and the detection unit includes a first motion detection unit that detects a movement generated in the communication terminal; And a second motion detecting means for detecting a motion generated in the vehicle, wherein the determining means is based on the detection result of the first motion detecting means and the detection result of the second motion detecting means. Communication terminal summarized in that to determine whether there either inside or outside the vehicle.

  According to this configuration, since the inside / outside determination of the communication terminal is performed based on the detection results of both the first movement detection unit and the second movement detection unit, whether the communication terminal exists in the vehicle or outside the vehicle, It becomes possible to determine more accurately.

  According to the present invention, even if a communication terminal having a key function is left in the vehicle, it is possible to prevent a situation in which the vehicle is illegally used by a third party or the like with the communication terminal left behind.

The block diagram which shows schematic structure of the key function invalidation apparatus of 1st Embodiment. The schematic diagram which shows the range image of the external communication area and in-vehicle communication area of a key operation free system. The schematic diagram which shows the installation place of a reader / writer outside a vehicle and a reader / writer inside a vehicle. Explanatory drawing which shows the example boarded with both an electronic key and a mobile telephone. Explanatory drawing which shows the example which got both the electronic key and the mobile phone, and got off. The figure which shows the acceleration change of the acceleration sensor in FIG. Explanatory drawing which shows the example which left the mobile phone in the car and got off. The figure which shows the acceleration change of the acceleration sensor in FIG. The block diagram which shows schematic structure of the key invalidation apparatus of 2nd Embodiment. The flowchart which shows the processing content of the vehicle inside / outside determination of a mobile telephone.

(First embodiment)
Hereinafter, a first embodiment of an electronic key system embodying the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the vehicle 1 is provided with a key operation free system 3 that automatically executes ID (Identification) verification when the electronic key 2 approaches the vehicle 1. This key operation free system 3 is installed in a car with a Smart Entry (registered trademark) system in which a door lock is unlocked and unlocked during a series of door opening and closing operations without actually performing a key operation. There is a one-push engine start system that can start an engine only by pushing a push-type engine switch 4. The key operation free system 3 constitutes an electronic key system.

  In this case, the vehicle 1 includes a verification ECU (Electronic Control Unit) 5 that performs key verification (ID verification) with the electronic key 2, a main body ECU 6 that manages operations of an in-vehicle motor, a relay, and the like, and an engine ( An engine ECU 7 is provided for managing the operation (not shown). The verification ECU 5 and the main body ECU 6 are connected via a LIN (Local Interconnect Network) 8, and the main body ECU 6 and the engine ECU 7 are connected via a CAN (Controller Area Network) 9. In the memory (not shown) of the verification ECU 5, an ID code of the electronic key 2 that forms a pair with the vehicle 1 is registered. The engine switch 4 is connected to both the verification ECU 5 and the main body ECU 6.

  The verification ECU 5 receives an out-of-vehicle transmitter 10 that transmits radio waves in the LF (Low Frequency) band outside the vehicle, an in-vehicle transmitter 11 that transmits radio waves in the LF band inside the vehicle, and radio waves in the UHF (Ultra High Frequency) band. The vehicle tuner 12 is connected. The vehicle transmitter 10 and the vehicle transmitter 11 transmit a request signal Srq as an ID transmission request to the electronic key 2 by LF band radio waves, and attempt to establish so-called smart communication.

  A door lock motor 6a is connected to the main body ECU 6 as a drive source for performing door lock locking / unlocking. The main body ECU 6 is connected to an ignition switch 13 that switches the power state of the vehicle 1 based on the operation of the engine switch 4. The ignition switch 13 is provided with an ACC (Accessory) relay 14 connected to an in-vehicle accessory, an IG (Ignition) relay 15 connected to various electrical components of the traveling system, and a starter relay 16 connected to an engine starter (not shown). Yes.

  On the other hand, the electronic key 2 is provided with a key control unit 17 that performs overall control of the operation of the electronic key 2. An ID code is registered in the memory (not shown) of the key control unit 17 as an ID unique to the key. The key control unit 17 is connected to an LF receiver 18 capable of receiving LF band radio waves and a UHF transmitter 19 capable of transmitting UHF band radio waves.

  As shown in FIG. 2, when the electronic key 2 is outside the vehicle, the vehicle outside transmitter 10 intermittently forms an outside communication area of the request signal Srq outside the vehicle within a range of several meters. When the electronic key 2 receives the request signal Srq outside the vehicle, the electronic key 2 returns an ID signal Sid with radio waves in the UHF band in response to the request signal Srq. The ID signal Sid includes the ID code of the electronic key 2. When the vehicle tuner 12 receives the ID signal Sid and establishes smart communication outside the vehicle (external communication), the verification ECU 5 executes smart verification outside the vehicle as ID verification (smart verification). And if this smart verification outside a vehicle is materialized, door lock locking / unlocking by main body ECU6 will be permitted or performed.

  Further, when it is detected by a courtesy switch (not shown) that the driver has boarded, for example, the in-vehicle transmitter 11 instead of the out-of-vehicle transmitter 10 forms an in-vehicle communication area for the request signal Srq in the entire vehicle. At this time, when the electronic key 2 enters the in-vehicle communication area and the in-vehicle smart communication (in-vehicle communication) is established, the verification ECU 5 executes the in-vehicle smart verification as ID verification (smart verification). And if this in-vehicle smart collation is materialized, the power supply transition operation and engine starting operation by engine switch 4 (engine ECU7) will be permitted.

  This smart entry system is provided with a function for preventing the electronic key 2 from being left behind in the vehicle for checking whether the electronic key 2 has been left behind in the vehicle. In this case, for example, when a lock button (not shown) of the outside door handle knob is pressed to lock the door lock, transmission of the request signal Srq from the in-vehicle transmitter 11 is started, and it is determined whether or not in-vehicle smart verification is established. Is done. When the in-vehicle smart verification is established, the user is notified that the electronic key 2 has been misplaced in the vehicle, for example, by sounding a buzzer or the like.

  As shown in FIG. 1, the vehicle 1 is provided with a mobile phone key system 21 that registers the ID code of the vehicle 1 in the mobile phone 20 and can use the mobile phone 20 as a vehicle key. Therefore, in the vehicle 1 of this example, if ID verification can be established at least one of the two systems of the key operation free system 3 and the mobile phone key system 21, the operation of the vehicle 1, that is, the operation of various in-vehicle devices. Is possible. The mobile phone 20 corresponds to a communication terminal, and the mobile phone key system 21 constitutes an electronic key system.

  The cellular phone key system 21 adopts a short-range wireless communication system in which the cellular phone 20 is held up to a position close to the vehicle 1 to perform ID verification (holding verification). In short-range wireless communication, for example, when the mobile phone 20 is held over the vehicle 1, the mobile phone 20 is activated (powered on) from the power-off by the driving radio wave Sv transmitted from the vehicle 1, and the ID signal Sid is returned to the vehicle 1. This is a communication format for causing the vehicle 1 to perform ID verification using the ID code included in the ID signal Sid. In addition, for example, FeliCa (registered trademark) is used as a kind of RFID (Radio Frequency identification) in near field communication (NFC). For example, HF (High Frequency) is used as the frequency of short-range wireless communication.

  In this case, as shown in FIG. 3, an outside reader / writer 22 capable of short-range wireless communication with the mobile phone 20 located outside the vehicle is provided near the door of the vehicle 1. In the vehicle, for example, a center console or the like is provided with an in-car reader / writer 23 capable of short-range wireless communication with the mobile phone 20 brought into the car. These reader / writers 22 and 23 are capable of both transmission of the drive radio wave Sv and reception of various radio waves transmitted from the mobile phone 20, that is, mutual communication.

  As shown in FIG. 1, the vehicle 1 is provided with a reader / writer ECU 24 that controls operations of the reader / writers 22 and 23. In the memory (not shown) of the reader / writer ECU 24, an ID code for holding collation is registered. The reader / writer ECU 24 intermittently transmits the drive radio wave Sv from the reader / writers 22 and 23 when the vehicle 1 is in a parked state or a stopped state, and performs a crossover check with the mobile phone 20.

  In addition, the mobile phone 20 is provided with a terminal control unit 25 that controls various operations of the mobile phone 20. The terminal control unit 25 is registered with an ID code for holding and collating for operating the mobile phone 20 as a vehicle key. The mobile phone 20 is provided with a short-range wireless communication unit 26 that performs short-range wireless communication with the reader / writers 22 and 23. The terminal control unit 25 is activated when the short-range wireless communication unit 26 receives the driving radio wave Sv from the reader / writers 22 and 23, and the ID code registered in the terminal control unit 25 is transmitted to the reader / writer 22, 22 via the short-range wireless communication unit 26. Reply to 23.

  The outside reader / writer 22 intermittently transmits the drive radio wave Sv when the user is outside the vehicle. When the mobile phone 20 is held over the outside reader / writer 22 from outside the vehicle, the terminal control unit 25 is activated by the drive radio wave Sv and starts collation with the outside reader / writer 22 over the vehicle. When the reader / writer ECU 24 obtains the ID code from the mobile phone 20 outside the vehicle, the reader / writer ECU 24 performs a hand-over collation (a vehicle-out hand collation) with this ID code. When the verification ECU 5 confirms that the vehicle exterior verification is established, the verification ECU 5 recognizes that the vehicle exterior verification is established, and switches between locking and unlocking the door lock.

  When the driver gets on the vehicle, the in-vehicle reader / writer 23 starts transmitting the driving radio wave Sv instead of the in-vehicle reader / writer 22. When the boarded driver holds the mobile phone 20 over the in-car reader / writer 23, the mobile phone 20 is activated by the driving radio wave Sv, and the hand-held verification with the in-car reader / writer 23 is started. At this time, the verification ECU 5 permits the power switch operation by the engine switch 4 when it is confirmed that the vehicle-holding verification is established.

  The vehicle 1 is provided with a Bluetooth wireless system 27 capable of wireless communication with the mobile phone 20 and Bluetooth (registered trademark). Bluetooth is a kind of short-range wireless communication technology used for connection between devices of about several meters, for example. Bluetooth has an advantage that, for example, radio waves in the 2.45 GHz band are used, and communication can be established if there is an obstacle between devices as long as the distance is about 10 m. Also, there is an advantage that power consumption can be suppressed as compared with infrared communication such as IrDA (Infrared Data Association). The Bluetooth wireless system 27 constitutes a communication unit.

  In this case, the vehicle 1 is provided with a Bluetooth communication device 28 that performs Bluetooth communication with the mobile phone 20 in the vehicle. The Bluetooth communication device 28 is connected to the main body ECU 6. On the other hand, the mobile phone 20 is provided with a Bluetooth communication unit 29 that performs Bluetooth communication with the vehicle 1. The Bluetooth communication according to the present embodiment can be communicated in the vehicle and around the vehicle 1. The vehicle 1 shares various information with the mobile phone 20 via Bluetooth communication.

  The vehicle 1 is provided with a key function disabling device 30 that disables the key function of the mobile phone 20 if the mobile phone 20 is left in the vehicle when the door lock is locked from outside the vehicle. The key function disabling device 30 of this example uses Bluetooth communication to check whether or not the mobile phone 20 has been left in the car. If the mobile phone 20 has not been taken out of the car, the mobile phone 20 has been left in the car. The key function of the mobile phone 20 is invalidated.

  In this case, the mobile phone 20 is provided with an acceleration sensor 40 that detects its own movement. The acceleration sensor 40 detects acceleration by a method such as an optical method or a semiconductor method. The acceleration sensor 40 detects the acceleration generated when the mobile phone 20 is carried and moves, and outputs sensor information including the detection result to the terminal control unit 25 as acceleration information. The terminal control unit 25 is provided with a sensor information acquisition unit 41 that acquires sensor information of the acceleration sensor 40. The acceleration sensor 40 functions as a motion detection unit (first motion detection unit).

  The verification ECU 5 is provided with a sensor information acquisition unit 31 that acquires sensor information of the mobile phone 20 via Bluetooth communication. For example, when the door lock of the vehicle 1 is unlocked or the power state of the vehicle 1 (ignition switch 13) is turned on, the sensor information acquisition unit 31 executes Bluetooth communication from the Bluetooth communication device 28 to the mobile phone 20. The request Sst is transmitted, and Bluetooth communication (placement confirmation communication) for acquiring sensor information of the acceleration sensor 40 from the mobile phone 20 is executed in order to check whether or not the mobile phone 20 is left behind in the vehicle. The sensor information acquisition unit 31 functions as a communication unit.

  The terminal control unit 25 is provided with a Bluetooth radio wave output unit 32 that executes misplacement confirmation communication with the vehicle 1 and Bluetooth. While receiving the Bluetooth communication execution request Sst from the vehicle 1, the Bluetooth radio wave output unit 32 returns a Bluetooth response radio wave Sra including sensor information from the Bluetooth communication unit 29. The sensor information acquisition unit 31 monitors the Bluetooth response radio wave Sra returned from the mobile phone 20 as a response to the Bluetooth communication execution request Sst. The Bluetooth radio wave output unit 32 constitutes a communication unit.

  The verification ECU 5 is provided with a misplacement determination unit 33 for confirming whether or not the mobile phone 20 having a key function has been left in the vehicle when the vehicle 1 is door-locked from outside the vehicle by Bluetooth communication. When the misplacement determination unit 33 of this example confirms that the door lock operation has been performed with the electronic key 2 or another mobile phone 20, the sensor information of the Bluetooth response radio wave Sra acquired by the sensor information acquisition unit 31 determines the acceleration sensor 40. Monitor acceleration. The misplacement determination unit 33 functions as a determination unit.

  For example, the misplacement determination unit 33 determines whether or not there has been a movement that the mobile phone 20 is estimated to have been taken out of the vehicle by monitoring sensor information from when IG is turned off to when the door is locked. In the case of this example, the misplacement determination unit 33 has not left the mobile phone 20 in the vehicle if the acceleration of the acceleration sensor 40 exceeds the determination line Vr (see FIGS. 6 and 8) within a certain time T from the door lock operation. Judge. On the other hand, if the acceleration of the acceleration sensor 40 remains below the determination line Vr for a certain time T, the misplacement determination unit 33 determines that the mobile phone 20 is misplaced in the vehicle.

  The verification ECU 5 is provided with an invalidation command unit 34 that causes the mobile phone 20 to execute a key function invalidation operation when the misplacement determination unit 33 recognizes that the mobile phone 20 is misplaced. When the invalidation command unit 34 receives a misplacement notification from the misplacement determination unit 33, the invalidation command unit 34 transmits an invalidation execution request Sac for starting the key function invalidation operation to the mobile phone 20 via Bluetooth communication. The invalidation command unit 34 constitutes invalidation means.

  The terminal control unit 25 is provided with an invalidation execution unit 35 that executes a key function invalidation operation when receiving the invalidation execution request Sac from the vehicle 1. When the key function of the mobile phone 20 is disabled, transmission of the ID code is prohibited, and the mobile phone 20 cannot be used as a vehicle key, and only the telephone function can be used. The invalidation execution unit 35 constitutes invalidation means.

  The terminal control unit 25 is provided with an invalidation forced stop unit 36 that gives a certain time before the mobile phone 20 enters the invalidation state when the invalidation execution request Sac is received from the vehicle 1. Yes. When the invalidation forced stop unit 36 receives the invalidation execution request Sac from the vehicle 1, the invalidation forced stop unit 36 sets a timer, and monitors whether or not the invalidation cancellation operation has been performed before the timer expires. The invalidation canceling operation is, for example, an operation of pressing the numeric keypad of the mobile phone 20 in a predetermined number and order. When the invalidation forced stop unit 36 detects an invalidation canceling operation within a certain time, the key function of the mobile phone 20 is not invalidated and remains valid. On the other hand, the invalidation forced stop unit 36 permits the invalidation operation by the invalidation execution unit 35 and invalidates the key function of the mobile phone 20 if the invalidation release operation cannot be detected within a predetermined time. It should be noted that the invalidation forced stop unit 36 constitutes an invalidation forced stop means.

  The verification ECU 5 is provided with an invalidation cancellation command unit 37 that cancels the invalidation state of the mobile phone 20. When the invalidation cancellation command unit 37 confirms that the door lock is normally unlocked with a regular key such as the electronic key 2, the invalidation cancellation request is issued to cancel the invalidation of the mobile phone 20 via Bluetooth communication. Scr is transmitted to the mobile phone 20. The invalidation cancellation command unit 37 constitutes an invalidation cancellation unit.

  The terminal control unit 25 is provided with an invalidation cancellation execution unit 38 that executes an invalidation cancellation operation when receiving the invalidation cancellation request Scr from the vehicle 1. The invalidation cancellation execution unit 38 of this example constantly monitors the presence / absence of Bluetooth radio waves when the key function of the mobile phone 20 is in an invalidated state, and receives an invalidation cancellation request Scr that is one radio wave of Bluetooth. Recognizing that the disabled state may be released, the disabled state of the mobile phone 20 is released. The invalidation cancellation execution unit 38 constitutes an invalidation cancellation unit.

Next, the operation of the key function disabling device 30 of this example will be described with reference to FIGS.
As shown in FIG. 4, it is assumed that the user has both the electronic key 2 and the mobile phone 20 and gets on the vehicle. At this time, assuming that one of the electronic key 2 and the mobile phone 20 is verified outside the vehicle and the door lock is unlocked, the sensor information acquisition unit 31 transmits a Bluetooth communication execution request Sst and starts Bluetooth communication. In the case of this example, the acceleration of the acceleration sensor 40 provided in the mobile phone 20 is continuously confirmed by Bluetooth until the next door lock locking operation is performed after the door lock is released.

  In this case, since both the electronic key 2 and the mobile phone 20 are carried, the Bluetooth communication is established between the vehicle 1 and the mobile phone 20, and the sensor information acquisition unit 31 receives the Bluetooth response radio wave Sra. Continue state. Subsequently, the user who gets on the vehicle depresses the engine switch 4 to start the engine and runs the vehicle 1. At this time, the sensor information acquisition unit 31 continues the Bluetooth communication with the mobile phone 20 even when the power state of the vehicle 1 is turned on. Further, after driving, even if the engine is stopped and the power state of the vehicle 1 is turned off, the sensor information acquisition unit 31 continues the Bluetooth communication with the mobile phone 20.

  Here, as shown in FIG. 5, it is assumed that the user gets both the electronic key 2 and the mobile phone 20 and gets off the vehicle, for example, the door lock of the vehicle 1 is locked with the electronic key 2. When the misplacement determination unit 33 confirms that the door lock is locked, the misplacement determination unit 33 confirms the acceleration of the sensor information from when the door is locked to when the door is locked. Here, an example in which the mobile phone 20 is also taken out of the vehicle is described. Therefore, the misplacement determination unit 33 confirms that the acceleration of the acceleration sensor 40 exceeds the determination line Vr within a certain time T as shown in FIG. Accordingly, the misplacement determination unit 33 recognizes that the mobile phone 20 is not misplaced in the vehicle, and prevents the invalidation command unit 34 from performing the key function invalidation operation.

  On the other hand, as shown in FIG. 7, it is assumed that the user has locked the door 1 of the vehicle 1 from the outside with the electronic key 2 while leaving the mobile phone 20 in the vehicle. Also at this time, the misplacement determination unit 33 confirms the acceleration of the sensor information from when the IG is off to when the door is locked. If the mobile phone 20 is left behind in the vehicle, the state where the acceleration of the acceleration sensor 40 is not detected continues. Therefore, the misplacement determination unit 33 confirms that the acceleration of the acceleration sensor 40 does not exceed the determination line Vr within a certain time T as shown in FIG. 8, and thus recognizes that the mobile phone 20 is misplaced in the vehicle. To do.

  When the misplacement determination unit 33 recognizes that the mobile phone 20 is left behind in the vehicle, the invalidation command unit 34 transmits an invalidation execution request Sac by Bluetooth communication so that the mobile phone 20 performs the key function invalidation operation. This invalidation execution request Sac is transmitted, for example, a plurality of times in order to reliably reach the mobile phone 20.

  When the cellular phone 20 receives the invalidation execution request Sac, first, the invalidation forced stop unit 36 operates. That is, the invalidation forced stop unit 36 does not immediately shift the mobile phone 20 to the invalidation state, but waits for a certain period of time before the invalidation state transition. Then, if the invalidation forced stop unit 36 detects the invalidation canceling operation on the mobile phone 20 within the grace period, the invalidation forcing stop unit 36 discards the invalidation execution request Sac and keeps the key function valid. Note that the invalidation forced stop unit 36 may notify the vehicle 1 of the invalidation state forced termination through Bluetooth communication.

  On the other hand, if the invalidation forced stop unit 36 does not detect the invalidation release operation within the grace period, the invalidation execution unit 35 performs the key function invalidation operation. The invalidation execution unit 35 invalidates the key function of the mobile phone 20 by preventing the activation state even when the driving radio wave Sv is received from the reader / writers 22 and 23, for example. Moreover, although it may transfer to a starting state, a key function may be invalidated by not returning an ID code.

  Assume that the door lock is unlocked with the electronic key 2 after the door lock of the vehicle 1 is locked. At this time, the invalidation cancellation command unit 37 transmits an invalidation cancellation request Scr to the mobile phone 20 by Bluetooth communication. When the Bluetooth communication unit 29 receives the invalidation cancellation request Scr, the invalidation cancellation execution unit 38 cancels the invalidation state of the key function being executed. As a result, the cellular phone 20 that has entered the invalidated state returns to a key function valid state that can be used again as a vehicle key. Note that the vehicle 1 may be notified to the vehicle 1 by Bluetooth communication that the mobile phone 20 has returned to the key function enabled state.

  By the way, when the mobile phone 20 has a key function, the mobile phone 20 can obtain the advantage that the vehicle 1 can be operated. On the other hand, the electronic key 2 locks the door lock with the mobile phone 20 forgotten in the vehicle. Therefore, it is assumed that the mobile phone 20 is left in the vehicle 1. In this case, for example, a third party or the like breaks the door lagas and illegally enters the vehicle, the engine is started by the cellular phone 20 that is misplaced, and the vehicle 1 is stolen.

  However, in this example, if the door lock is locked from the outside of the vehicle while the mobile phone 20 is left in the vehicle, the key function of the mobile phone 20 is invalidated. Even if the telephone 20 is taken, the mobile phone 20 cannot operate the vehicle 1. Therefore, the security against unauthorized use of the vehicle 1 is improved, and the risk of leaving the in-vehicle key can be reduced. This is also true when two mobile phones 20 having key functions are held and one is left in the vehicle.

  Further, when the mobile phone 20 is taken out of the vehicle, the user picks up the mobile phone 20 or the bag containing the mobile phone 20 and gets out of the vehicle and leaves the vehicle 1, so that the vertical direction or horizontal direction generated during this time The acceleration in the direction can be detected by the acceleration sensor 40. Therefore, it is possible to detect the take-out of the mobile phone 20 more accurately.

As described above, according to the embodiment described above, the following effects can be obtained.
(1) When the door is locked from outside the vehicle, the acceleration by the acceleration sensor 40 of the mobile phone 20 having a key function is monitored, and if no acceleration is detected within a certain time T, the mobile phone Assuming that 20 is misplaced, the key function of the mobile phone 20 is invalidated. Therefore, even if the mobile phone 20 misplaced in the vehicle is stolen by a third party, the mobile phone 20 cannot be operated by the mobile phone 20, so that security against unauthorized use of the vehicle 1 and vehicle theft can be ensured. it can. Further, by detecting the specific movement when the mobile phone 20 is taken out of the vehicle by the acceleration sensor 40 and determining whether or not the mobile phone 20 is taken out, the mobile phone 20 can be detected more accurately.

  (2) Since the sensor information is acquired by Bluetooth communication to check whether the mobile phone 20 has been left behind in the vehicle, it is possible to check whether the mobile phone 20 has been left in the vehicle by communication with high noise resistance such as Bluetooth communication.

  (3) When both the key operation free system 3 and the cellular phone key system 21 are mounted on the vehicle 1, the cellular phone 20 has a key function by unlocking the electronic key 2 door lock while leaving the cellular phone 20 in the vehicle. There is a high possibility that 20 will be left in the car. Therefore, it can be said that the effect is very high in terms of preventing the vehicle theft more times.

  (4) Many recent mobile phones 20 tend to have a Bluetooth communication function as a standard feature in many mobile phones. Therefore, when determining whether or not the mobile phone 20 is left behind in the vehicle, if the presence or absence of the mobile phone 20 is determined by Bluetooth communication, whether or not the mobile phone 20 is left in the vehicle can be determined by the communication device originally provided in the mobile phone 20.

  (5) When switching the mobile phone 20 to the invalidation state, a certain grace period is given, and if there is no operation even after the grace time has elapsed, the mobile phone 20 is switched to the invalidation state. Therefore, since the mobile phone 20 is switched to the invalidation state with a grace period, if the mobile phone 20 is immediately forgotten to be left in the vehicle when the door lock is locked, for example, the mobile phone 20 is activated as a key function. The state can be maintained.

  (6) After the mobile phone 20 enters the invalidation state, if there is an operation with a high possibility of an authorized user, for example, the door lock is unlocked, the mobile phone 20 is returned to the original key function activation state. It is. Therefore, even if the cellular phone 20 is left in the vehicle and the cellular phone 20 is set to the invalidation state, the cellular phone 20 can be returned to the original function valid state.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. This example is an embodiment in which the motion detection method of the mobile phone 20 described in the second embodiment is changed, and the other basic configuration is the same. Therefore, the same portions as those in the first embodiment are denoted by the same reference numerals, detailed description thereof is omitted, and only different portions are described in detail.

  As shown in FIG. 9, the vehicle 1 is provided with an acceleration sensor 50 that detects a motion generated in the vehicle 1. The acceleration sensor 50 detects acceleration by a method such as an optical method or a semiconductor method, and outputs the sensor information to the verification ECU 5 as acceleration information. The acceleration sensor 50 is activated when, for example, the ignition switch 13 of the vehicle 1 is turned on, constantly monitoring the movement generated in the vehicle 1 while the IG is on, and outputs the detected movement to the verification ECU 5 as acceleration information. . The ignition switch 13 being on means a state in which, for example, the ACC relay 14 and the IG relay 15 are on. The acceleration sensor 50 corresponds to a motion detection unit (second motion detection unit).

  The misplacement determination unit 33 of this example is based on acceleration information acquired from the mobile phone 20 via Bluetooth communication and acceleration information acquired from the acceleration sensor 50 of the vehicle 1. Determine whether you are doing. This is because, for example, even if the mobile phone 20 moves due to the shaking of the vehicle body while the vehicle is running, this is not detected as a movement to take the mobile phone 20 out of the vehicle.

  For example, the determination of whether the mobile phone 20 is left in the vehicle is detected by detecting a difference between the acceleration information of the acceleration sensor 40 of the mobile phone 20 and the acceleration information of the acceleration sensor 50 of the vehicle 1 and whether or not the difference is within a threshold value. There is a method to check. As another determination, for example, the acceleration sensor 50 of the vehicle 1 is used to determine whether the mobile phone 20 moves based on the acceleration information of the acceleration sensor 40 of the mobile phone 20 (example of the first embodiment). When one shake is detected, during this time, there is one that raises the determination level or ignores the movement of the mobile phone 20.

  Next, the operation of the key function disabling device 30 of this example will be described with reference to FIG. Note that the flowchart of FIG. 10 is an operation flow showing the flow when the vehicle 1 and the mobile phone 20 execute the in-car leave determination.

First, in step 100, the vehicle 1 executes ID verification (in-car holding verification) with the mobile phone 20 brought into the vehicle.
In step 101, the vehicle 1 activates the Bluetooth communication device 28 and connects the Bluetooth communication with the mobile phone 20.

  In step 102, when the vehicle 1 confirms that the ignition switch 13 is turned on, the vehicle 1 transmits the Bluetooth communication execution request Sst from the Bluetooth communication device 28 to the mobile phone 20, and whether the mobile phone 20 is inside or outside the vehicle. Start the determination.

  In step 103, the mobile phone 20 transmits the movement of the mobile phone 20 detected by the acceleration sensor 40 to the vehicle 1 by Bluetooth communication as a Bluetooth response radio wave Sra while receiving the Bluetooth communication execution request Sst from the vehicle 1. To do.

In step 104, the vehicle 1 acquires acceleration information from the in-vehicle acceleration sensor 50.
In step 105, the misplacement determination unit 33 (vehicle 1) determines whether the mobile phone 20 is inside or outside the vehicle based on the acceleration information acquired from the acceleration sensor 40 of the mobile phone 20 and the acceleration information acquired from the acceleration sensor 50 of the vehicle 1. It is judged whether it is in either.

  At this time, the misplacement determination unit 33 calculates, for example, the difference between the acceleration acquired from the acceleration sensor 40 of the mobile phone 20 and the acceleration of the acceleration sensor 50 of the vehicle 1, and determines whether or not this difference is within the threshold value. judge. For example, when the mobile phone 20 is present in the vehicle, the mobile phone 20 and the vehicle 1 move in the same manner, so the difference is within the threshold. On the other hand, when the mobile phone 20 is taken out from the stopped vehicle 1, only the mobile phone 20 moves, so that the difference becomes larger than the threshold value. Therefore, the misplacement determination unit 33 performs the in-vehicle / out-of-vehicle determination of the mobile phone 20 by confirming whether or not the difference falls within the threshold.

  In step 106, it is determined whether the misplacement determination unit 33 has detected the mobile phone 20 being taken out of the vehicle. At this time, if the misplacement determination unit 33 does not detect the mobile phone 20 being taken out of the vehicle, the process proceeds to step 107, and if the mobile phone 20 is taken out of the vehicle, the process proceeds to step 110.

  In step 107, the misplacement determination unit 33 (vehicle 1) determines whether or not the ignition switch 13 is off and the door lock is locked. At this time, if the ignition switch 13 is off and the door lock is locked, the routine proceeds to step 108. If the ignition switch 13 is off and the door lock is not locked, the routine returns to step 103.

  In step 108, the vehicle 1 invalidates the key function of the mobile phone 20. That is, the invalidation command unit 34 transmits the invalidation execution request Sac to the mobile phone 20 by Bluetooth communication. Therefore, the mobile phone 20 receives the invalidation execution request Sac from the vehicle 1. For this reason, the invalidation execution unit 35 invalidates the key function of the mobile phone 20 on condition that the invalidation release operation is not detected within a grace period after receiving the invalidation execution request Sac.

In step 109, the vehicle 1 disconnects the Bluetooth communication. That is, the vehicle 1 turns off the Bluetooth communication device 28 and stands by until the next operation.
If YES is determined in step 106, the process proceeds to step 110. In step 110, the vehicle 1 determines whether or not the ignition switch 13 is turned off after the mobile phone 20 is taken out of the vehicle. At this time, if the ignition switch 13 is not turned off, the routine proceeds to step 111 because the engine has been forgotten to be turned off, and if the ignition switch 13 is off, the routine proceeds to step 112.

In step 111, the vehicle 1 warns, for example, with a buzzer, that the vehicle key (mobile phone 20) is not in the vehicle even though the engine is running.
In step 112, the vehicle 1 determines whether or not the door lock is locked after the ignition switch 13 is turned off. If the door lock is not locked, the process proceeds to step 113 because the door lock is forgotten to be locked, and if the door lock is locked, the process proceeds to step 109.

  In step 113, the vehicle 1 warns, for example, with a buzzer, that the door lock is not locked despite the vehicle key (mobile phone 20) being taken out of the vehicle.

  As described above, in this example, the acceleration sensor 50 is mounted not only on the mobile phone 20 but also on the vehicle 1, the acceleration information acquired from the acceleration sensor 40 of the mobile phone 20, and the acceleration information acquired from the acceleration sensor 50 of the vehicle 1. Based on the above, it is determined whether the mobile phone 20 is inside or outside the vehicle. For this reason, when the mobile phone 20 moves due to the shaking of the vehicle 1, this can be excluded from the position determination. Therefore, it is possible to accurately determine whether the mobile phone 20 is left behind in the vehicle or whether the mobile phone 20 is taken out of the vehicle.

As mentioned above, according to embodiment described, in addition to (1)-(6) of 1st Embodiment, there can exist the following effects.
(7) The mobile phone 20 is provided with the acceleration sensor 40, the vehicle 1 is also provided with the acceleration sensor 50, and based on the acceleration information obtained from the acceleration sensors 40, 50, the mobile phone 20 is present inside or outside the vehicle. Determine. Therefore, it can be accurately determined whether the mobile phone 20 has been left behind in the vehicle or taken out of the vehicle.

  (8) It is monitored whether or not the mobile phone 20 is taken out of the vehicle, and if the mobile phone 20 is taken out of the vehicle while the engine is in operation, the vehicle 1 warns that effect. Therefore, it is possible to make it difficult to forget to turn off the engine.

In addition, the said embodiment can be implemented with the following forms which changed this suitably.
In each embodiment, the vehicle 1 is not limited to being provided with both the key operation free system 3 and the mobile phone key system 21 in parallel. For example, when only the mobile phone key system 21 is installed in the vehicle 1 and the two mobile phones 20 are carried, when one mobile phone 20 is left in the vehicle and the door lock is locked by the other mobile phone 20, The present invention may be applied to an example in which the key function of the mobile phone 20 that is left in the vehicle is invalidated.

  In each embodiment, the presence / absence of movement of the mobile phone 20 is determined based on whether or not the acceleration of the acceleration sensor 40 is greater than the determination line Vr within a certain time T. However, according to the presence / absence of acceleration and the user's movement mode. The determination method may be changed as appropriate.

  In each embodiment, the sensor information acquisition unit 31 is not limited to monitoring the acceleration all the time after the mobile phone 20 is brought into the vehicle. For example, when the door lock is locked, the sensor information acquisition unit 31 first checks the acceleration. You may go to

  In the first embodiment, it is possible to detect the movement of the mobile phone 20 based on the movement of the engine switch 4 from IG ON (ignition switch 13 is ON) to the door lock.

  In the second embodiment, the inside / outside determination of the mobile phone 20 is not limited to the example described in the embodiment, and the acceleration information of the acceleration sensor 40 of the mobile phone 20 and the acceleration information of the acceleration sensor 50 of the vehicle 1 are used. The method is not particularly limited as long as it is determined by use.

  In each embodiment, the Bluetooth communication is performed when, for example, the door lock of the vehicle 1 is unlocked or the power state of the vehicle 1 is turned on. However, the Bluetooth communication from the vehicle 1 to the mobile phone 20 is performed. The communication execution request Sst may be intermittently transmitted so that the mobile phone 20 automatically connects when entering the area where Bluetooth communication is possible.

In each embodiment, the invalidation state is not limited to a state in which only the key function of the mobile phone 20 is invalidated. For example, other functions or operations of the mobile phone 20 itself may be invalidated.
-In each embodiment, the communication which sees the misplacement of the mobile phone 20 is not limited to Bluetooth, and other short-range wireless communication may be adopted as long as the communication distance is several meters. The communication network used when transmitting acceleration information may be the communication network of the key operation free system 3.

-In each embodiment, the cancellation | release operation of a disabled state is not limited to unlocking of a door lock, For example, it is good also as conditions on the engine having been started by the electronic key 2. FIG.
In each embodiment, the function of giving a grace to switching to the invalidation state and the function of canceling the invalidation state are not necessarily required, and these may be omitted.

-In each embodiment, the bidirectional | two-way communication of the key operation free system 3 is not limited to a frequency differing in outbound communication and inbound communication, and it is good also as the same frequency.
In each embodiment, the smart entry system of the key operation free system 3 is not limited to switching between locking and unlocking the door lock by operating the door handle outside the vehicle. For example, the door lock may be automatically unlocked when approaching the vehicle 1, and the door lock may be automatically locked when leaving the vehicle 1.

  -In each embodiment, an electronic key system is not limited to the key operation free system 3, It is good also as an immobilizer system which collates with a tag by RFID. Further, the vehicle 1 may be equipped with a wireless key system for remotely operating the vehicle 1 with a button provided on the electronic key 2.

  In each embodiment, the electronic key system is not limited to the one that the electronic key 2 moves by its own power source. For example, the electronic key system may be battery-less using the driving radio wave transmitted from the vehicle 1 as the power source of the electronic key 2.

In each embodiment, the key function disabling device 30 is not limited to being applied to the vehicle 1 and may be applied to other devices and devices.
-In each embodiment, the vehicle equipment which can be used with an electronic key system is not limited to a door lock or an engine, For example, it is good also as a car navigation system, an audio system, an air conditioner system etc.

In each embodiment, short-range wireless communication is not limited to RFID, and any type of communication may be employed as long as the communication distance is about several tens of centimeters.
In each embodiment, the narrow-area wireless communication is not limited to the communication conforming to the key operation free system 3, and various other communications can be applied.

-In each embodiment, a communication terminal is not limited to the mobile telephone 20, You may use another terminal.
-In each embodiment, ID verification of smart collation and holding collation may be performed by collation ECU5.

In each embodiment, the motion detection unit that detects the movement of the mobile phone 20 is not limited to the acceleration sensor 40 that detects acceleration, and may be a vibration sensor that detects vibration.
-In each embodiment, a motion detection means may be a vehicle-mounted camera, for example. In this case, the video captured by the camera is subjected to image processing, and the movement of the mobile phone 20 is confirmed.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... Electronic key, 3 ... Key operation free system which comprises an electronic key system, 20 ... Mobile telephone as a communication terminal, 21 ... Mobile telephone key system which comprises an electronic key system, 27 ... Communication means Bluetooth wireless system, 30 ... key function invalidation device, 31 ... sensor information acquisition unit constituting communication means, 32 ... Bluetooth radio wave output unit constituting communication means, 33 ... misplacement judgment unit as judgment means, 34 ... invalid Invalidation command unit constituting the disabling means, 35 ... Invalidation executing part constituting the disabling means, 36 ... Invalidation compulsory stopping unit as the invalidation compulsory stopping means, 37 ... Invalidation canceling constituting the disabling release means Command unit, 38... Invalidation cancellation execution unit constituting invalidation cancellation unit, 40... Acceleration sensor as motion detection unit (first motion detection unit), 0 ... acceleration sensor as motion detection means (second movement detector).

Claims (6)

In an electronic key system in which ID verification via short-range wireless communication is possible by a communication terminal, and operation of the in-vehicle device is permitted or executed if the ID verification is established,
A motion detecting means for detecting a motion given to the communication terminal;
Determination means for determining whether or not the communication terminal exists in a vehicle based on a detection result of the motion detection means;
When the vehicle door lock is locked, if the communication terminal remains misplaced in the vehicle, invalidating means for invalidating at least the key function of the communication terminal ;
A communication unit that wirelessly transmits the detection signal detected by the motion detection unit to the vehicle from the communication terminal;
The determination unit obtains a detection signal of the motion detection unit via the communication unit, and executes a determination to leave the communication terminal in the vehicle on the vehicle side,
The electronic key system according to claim 1, wherein the communication means executes communication in a communication network of a system different from the ID verification . ID verification is possible through narrow-band wireless communication with an electronic key, and operation of the in-vehicle device is permitted or executed if the ID verification is established with at least one of the electronic key and the communication terminal. The electronic key system according to claim 1 . The electronic key system according to claim 1 or 2 , wherein the communication terminal is a mobile phone, and communication used by the communication means is Bluetooth communication. After the communication terminal enters the invalidation state, if there is a release operation for canceling the invalidation, the invalidation release means for canceling the invalidation state and returning the key function of the communication terminal is provided. The electronic key system according to any one of claims 1 to 3 . The communication means starts acquisition of the detection result by connecting to a radio of another system using a door lock unlocking or a vehicle power on as a trigger,
Said determining means, when the door lock of the vehicle is locked, the electronic key according to any one of claims 1 to 4, characterized in that said communication terminal to determine whether in the car system. In an electronic key system in which ID verification via short-range wireless communication is possible by a communication terminal, and operation of the in-vehicle device is permitted or executed if the ID verification is established,
A motion detecting means for detecting a motion given to the communication terminal;
Determination means for determining whether or not the communication terminal exists in a vehicle based on a detection result of the motion detection means;
When the door lock of the vehicle is locked, if the communication terminal remains misplaced in the vehicle, the invalidation means for invalidating at least the key function of the communication terminal,
The detection means includes first movement detection means for detecting movement generated in the communication terminal, and second movement detection means for detecting movement generated in the vehicle,
The determination means determines whether the communication terminal exists inside or outside the vehicle based on the detection result of the first motion detection means and the detection result of the second motion detection means. that electronic key system.

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