JP5846379B2 - Warning device - Google Patents

Description

  The present invention relates to a warning device that issues a keyless warning that an electronic key of an electronic key system that permits operations such as engine start and door lock is not present in a vehicle compartment, provided that the vehicle has an electronic key.

  Conventionally, an electronic device that determines whether or not the electronic key is in the vehicle interior by wireless communication with an electronic key possessed by the user, and permits operation such as engine start and door lock when it is determined that the electronic key is in the vehicle interior. A key system (smart entry system) is known. In this electronic key system, the user does not have to be aware of the position of the electronic key, but the electronic key may be taken out of the vehicle for an unintended reason. For example, assume a scene where a person is sent by car to a place such as a station. At this time, an electronic key is placed in a bag of a person who is sent by car, and the person may take the bag out of the vehicle while the electronic key is in the bag. In this way, if a situation occurs in which the electronic key is taken out of the vehicle halfway, the engine cannot be started again after the vehicle is turned off. In particular, when such a situation occurs when traveling away, such as travel, it is fatal because it is not possible to easily return to the home for the spare key even if other moving means other than the car is used. Therefore, in the electronic key system, generally, when the push switch for starting the engine is operated by the user or when the vehicle door is opened and closed, it is determined whether or not the electronic key is in the passenger compartment. If there is no key, a buzzer sound is used to give a keyless warning (see Non-Patent Document 1).

“Smart Entry & Start System Instruction Manual”, p. 151, 152, [PDF document], [March 28, 2012 search], Internet (URL: http://gazoo.com/nvis/im/torisetu/4806/M28659_3_3.pdf)

  However, conventionally, since the keyless warning is performed in synchronization with the user operation such as the push switch operation or the door opening / closing operation by the user, the user concentrates on trying to start a certain operation, and the keyless warning is performed. There is a possibility to miss. In addition, the user may mistake the keyless warning as a warning for an operation performed by the user. Further, when a user operation that triggers a keyless warning is not performed, such as when a bag containing an electronic key is passed to a person through a window of the vehicle, the keyless warning is not performed. Thus, conventionally, there has been a problem that it is difficult for the user to notice that there is no electronic key in the passenger compartment.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an apparatus that makes it easy for a user to notice that an electronic key is not in a passenger compartment.

In order to solve the above-described problems, the present invention provides an electronic key in a vehicle compartment of a vehicle equipped with an electronic key system that permits the operation of a predetermined on-vehicle device provided that there is an electronic key in the vehicle compartment. A warning device that performs a keyless warning that is a warning of absence,
Obtaining means for obtaining information of a travel route of the vehicle;
A first situation determination means for determining whether or not the traveling situation of the vehicle is a first situation where an entrance of a highway is on the traveling route indicated by the information;
A key presence / absence determining means for determining whether or not the electronic key is present in a vehicle interior when the traveling state of the vehicle is the first situation ;
And a warning means for notifying the user of the vehicle of the absence of the key based on the fact that the key presence / absence determining means determines that the electronic key is not present in the passenger compartment.

According to the present invention, it is possible to perform without a key warning asynchronously User chromatography THE operation. Therefore, the user can listen to the keyless warning according to the present invention more intensively than when the keyless warning synchronized with the user operation is performed. Even if no user operation is performed, a keyless warning can be issued. This makes it easier for the user to notice that the electronic key is not in the passenger compartment.

1 is a configuration diagram of a vehicle system 1. FIG. It is a figure explaining the installation position etc. of the vehicle interior transmitter 40 and the vehicle interior transmitter 50, etc. FIG. It is a flowchart of a key presence determination process. It is a flowchart of a keyless warning process.

  Hereinafter, embodiments of a warning device of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration diagram of a vehicle system 1 to which a warning device of the present invention is applied. The vehicle system 1 is mounted on a vehicle 10 (see FIG. 2). The vehicle system 1 includes smart entry systems (electronic key systems) 3 and 4 and a navigation system 6. The smart entry system includes a vehicle-side device 3 (see FIG. 1) mounted on the vehicle 10 and an electronic key 4 (see FIG. 2) possessed by the user 20. The vehicle side device 3 (smart ECU 30) and the navigation system 6 (navigation ECU 60) are connected to each other via a vehicle-mounted LAN 2 such as CAN. First, the smart entry systems 3 and 4 will be described.

  The vehicle side device 3 of the smart entry system includes a vehicle interior transmitter 40, a vehicle exterior transmitter 50, a tuner 53, a push switch 74, a door ECU 75, an engine ECU 76, and a smart ECU 30 connected thereto. As shown in FIG. 2, the vehicle interior transmitter 40 includes a front transmitter 41 installed near the front seat in the vehicle interior of the vehicle 10, and a rear transmitter 42 installed near the rear seat in the vehicle interior. have. The front transmitter 41 transmits a request signal for confirming the presence or absence of the electronic key 4 to an area covering the front side of the vehicle interior. The rear transmitter 42 transmits a request signal to an area covering the rear side of the vehicle interior. That is, a request signal is transmitted so that these two transmitters 41 and 42 cover the entire vehicle interior area. As shown in FIG. 2, the vehicle interior transmitter 50 is installed at each door 101 of the vehicle 10, and transmits a request signal to the area 11 outside the vehicle compartment near each door 101. Each area 11 is an area of about 1 m from each door 101. Each transmitter 40, 50 transmits an LF radio wave (for example, a 134 kHz radio wave) as a request signal.

  The tuner 53 receives a response signal radio wave (RF radio wave (for example, 300 to 400 MHz band)) transmitted from an electronic key 4 (see FIG. 2) described later, demodulates the response signal, and outputs the response signal to the smart ECU 30. To do. The tuner 53 is installed, for example, in a pillar (C pillar) behind the rear seat. The push switch 74 is provided on the instrument panel of the vehicle 10 and is a switch for instructing to turn on an accessory power source and an ignition power source, and instructing engine start and engine stop. An operation signal of the push switch 74 is input to the smart ECU 30. The door ECU 75 is an ECU that controls the locking and unlocking of each door 101. The engine ECU 76 is an ECU that controls the engine 77.

  The smart ECU 30 includes a CPU, a ROM, a RAM, and the like, and executes various processes related to the smart entry system. Specifically, the smart ECU 30 causes the outside transmitter 50 to intermittently transmit a request signal when the vehicle 10 is parked. Thereafter, when the smart ECU 30 receives a response signal from the electronic key 4 via the tuner 53, the smart ECU 30 collates the ID code included in the response signal with the ID code stored in its own memory. If the verification is possible, the smart ECU 30 instructs the door ECU 75 to permit the door 101 to be locked or unlocked.

  Further, when the push switch 74 is operated, the smart ECU 30 transmits a request signal to the vehicle interior by the vehicle interior transmitter 40 in order to confirm whether or not the electronic key 4 is present in the vehicle interior. After that, the smart ECU 30 receives the response signal from the electronic key 4 in response to the request signal, and when the ID code can be verified, turns on the accessory power source or the ignition power source or instructs the engine ECU 76 The engine 77 is started. On the other hand, if the response signal from the electronic key 4 cannot be received, or if the response signal is received but the ID code cannot be verified, the smart ECU 30 determines that the regular electronic key 4 is not in the passenger compartment. The power-on (starting of the engine 77) is not permitted. When the push switch 74 is operated to turn off the power, the smart ECU 30 permits the power off (engine stop) regardless of whether or not the electronic key 4 is in the passenger compartment. .

  Further, the smart ECU 30 confirms whether or not the electronic key 4 is present in the vehicle interior under a certain condition, and issues a warning (no key warning) if there is no electronic key 4. Specifically, the smart ECU 30 confirms the presence or absence of the electronic key 4 when the push switch 74 is operated when the power is turned off, that is, when there is no electronic key 4. I do. Further, the smart ECU 30 confirms the presence or absence of the electronic key 4 when the door 101 is opened or closed when the power is turned on, and issues a keyless warning if the electronic key 4 is not present. That is, the smart ECU 30 performs a keyless warning in synchronization with a conventional user operation. The keyless warning is given as, for example, a buzzer sound (such as a beep (continuous sound) or a beep (intermittent sound)) from the speaker 64. Furthermore, the smart ECU 30 also performs a keyless warning asynchronous with the user operation in cooperation with the navigation system 6 described later. Details of the no key warning will be described later.

  The electronic key 4 is a portable wireless communication device that transmits a radio wave of a response signal including an ID code (a radio wave in an RF band (for example, 300 to 400 MHz band)) in response to a request signal from the vehicle side device 3. .

  Next, the configuration of the navigation system 6 will be described. The navigation system 6 includes a position detector 61, a map data storage unit 62, a display 63, a speaker 64, and a navigation ECU 60 connected thereto. The position detector 61 detects the current position of the vehicle 10. The position detector 61 includes, for example, a geomagnetic sensor, a gyroscope that detects the rotational angular velocity of the vehicle 10, a distance sensor that detects the travel distance of the vehicle 10, a GPS receiver that receives GPS signals from GPS satellites, and the like.

  The map data storage unit 62 is a storage unit such as a hard disk device (HDD) or a flash memory in which road map data is stored. The road map data stored in the map data storage unit 62 is composed of link data constituting roads and node data constituting intersections and branch points. The link data includes information on the position coordinates, distance, required time, road width, number of lanes, speed limit, road type (type of general road, highway, etc.) of the corresponding road. The node data includes information such as the position coordinates of the corresponding intersection or branch point, the number of right / left turn lanes, and the connection destination road link. The road map data also includes map image data to be displayed on the display 63.

  The display 63 is a display device such as a liquid crystal display capable of displaying various images. The display 63 is provided at a position where the driver can easily see, for example, a center panel portion (not shown) between the driver seat and the passenger seat. The speaker 64 is a sound output unit that outputs sound into the passenger compartment.

  The navigation ECU 60 includes a CPU, a ROM, a RAM, and the like, and executes various processes related to navigation of the vehicle 10. Specifically, the navigation ECU 60 determines a map image around the current value of the vehicle 10 (the current value mark of the vehicle is based on a detection signal from the position detector 61 and road map data stored in the map data storage unit 62. The superimposed map image) is displayed on the display 63. The navigation ECU 60 displays a destination setting screen on the display 63 or searches for an optimum route to the set destination based on the road map data. The navigation ECU 60 provides voice guidance from the speaker 64 as necessary when guiding the route to the destination.

  Further, the navigation ECU 60 cooperates with the smart ECU 30 to issue a key absence warning for the electronic key 4 (a key absence warning asynchronous with the user operation) in accordance with the traveling state of the vehicle 10. In the present embodiment, as an example, an example will be described in which a keyless warning is issued when the vehicle 10 is about to travel on a highway. Hereinafter, the processing of the keyless warning asynchronous with the user operation performed by the smart ECU 30 and the navigation ECU 60 will be described. FIG. 3 shows a flowchart of key presence / absence determination processing for determining whether or not the electronic key 4 is in the passenger compartment. FIG. 4 shows a flowchart of the keyless warning process. In the flowcharts of FIGS. 3 and 4, processing steps executed by the smart ECU 30 and processing steps executed by the navigation ECU 60 are mixed. First, the processing of FIG. 3 will be described. The process in FIG. 3 is started, for example, at the same time when the vehicle 10 is powered on (engine start), and is repeatedly executed until the power is turned off (engine stop).

  When the processing of FIG. 3 is started, first, the navigation ECU 60 determines whether or not the destination is set and the route guidance to the destination is performed by the navigation ECU 60 (S11). If route guidance is being performed (S11: Yes), the process proceeds to S12. In S12, the navigation ECU 60 determines whether or not there is an entrance to the highway on the route on which it is guiding (S12). Specifically, the navigation ECU 60 refers to road map data (link data, node data) constituting the guide route, and determines whether or not the road map data includes an entrance of an expressway (S12). ).

  On the other hand, in S11, when route guidance is not performed (S11: No), it progresses to S16. In S16, the navigation ECU 60 determines whether there is an entrance to the highway on the road where the vehicle 10 is currently traveling (S16). Specifically, the navigation ECU 60 acquires from the map data storage unit 62 data on the road on which the vehicle 10 is currently traveling (data on the road on the traveling direction side of the vehicle 10 relative to the current location of the vehicle 10). Then, it is determined whether or not the information on the entrance to the expressway is attached to the acquired road data.

  In S12 or S16, when there is no highway entrance on the guide route or on the road (S12: No, S16: No), the process proceeds to S17. In S17, the no key flag is turned off (S17). This keyless flag is a flag that is turned on when the electronic key 4 is not in the passenger compartment. As described above, in this embodiment, when there is no highway entrance on the guide route or along the road, the no key flag is turned off regardless of whether or not the electronic key 4 is in the passenger compartment. The no key warning in S23 of FIG. 4 is not performed. Note that either the smart ECU 30 or the navigation ECU 60 may set the no key flag, but in the present embodiment, the smart ECU 30 will be described as setting the no key flag. In this case, a memory area (such as RAM) in the smart ECU 30 is provided with a keyless flag storage area, and the smart ECU 30 stores the keyless flag set in the storage area.

  In S12 or S16, if there is an expressway entrance on the guide route or on the road (S12: Yes, S16: Yes), the process proceeds to S13. In S13, the navigation ECU 60 continues based on the link length of the link data from the current location of the vehicle 10 (which can be specified by the position detector 61) to the entrance of the expressway (which can be specified by road map data) during the vehicle travel. Then, the distance d from the current location of the vehicle 10 to the entrance of the expressway is calculated (S13). Then, it is determined whether or not the distance d has changed from a predetermined first threshold value X to a value less than the first threshold value X (S13). Note that the first threshold value X is, for example, 1 km. When the distance d does not change from the first threshold value X to the first threshold value X (S13: No), the process returns to S11. The case where the distance d does not change from the first threshold value X or more to the first threshold value X is a case where the distance d is the first threshold value X or more. When the distance d is greater than or equal to the first threshold value X, the processes of S11 to S13 are repeated, and the distance d gradually decreases as the vehicle 10 approaches the entrance of the expressway. When the distance d changes to less than the first threshold value X (S13: Yes), the process proceeds to S14. Thus, in S13, it is the same as determining the timing at which the distance d has changed from the first threshold value X to less than the first threshold value X. The navigation ECU 60 notifies the smart ECU 30 that the distance d has changed to less than the first threshold value X (S13: Yes).

  In S14, based on the notification from the navigation ECU 60, the smart ECU 30 transmits a request signal to the vehicle interior using the vehicle interior transmitter 40 (see FIGS. 1 and 2), and whether or not the electronic key 4 is present in the vehicle interior. The key presence / absence determination is performed (S14). At this time, the smart ECU 30 receives the response signal from the electronic key 4 and determines that the electronic key 4 is in the passenger compartment when the ID code included in the response signal can be verified. On the other hand, the smart ECU 30 determines that the electronic key 4 is not in the passenger compartment when the response signal from the electronic key 4 cannot be received or when it is received but the ID code cannot be verified. In addition, the process of S14 is a process performed at the timing when the distance d changes from the first threshold value X to less than the first threshold value X. Therefore, when the timing has passed, even if the distance d is less than the first threshold value X, the process of S14 is not performed.

  In S14, when the electronic key 4 is in the passenger compartment (S14: No), the process proceeds to S17, and the smart ECU 30 turns off the no key flag. On the other hand, when the electronic key 4 is not in the vehicle interior (S14: Yes), the process proceeds to S15. In S15, the smart ECU 30 turns on the no key flag. Thereafter, the process of FIG. 3 is terminated.

  Next, the process of FIG. 4 will be described. The process in FIG. 4 is started on the assumption that S13 in FIG. 3 is Yes. That is, the process of FIG. 4 includes the entrance of a highway on the route of the vehicle 10 (when route guidance is provided) or on the road (when route guidance is not provided), and the distance d to the entrance is the first. 1 is started when the threshold value changes to less than X. When the processing of FIG. 4 is started, the navigation ECU 60 continues to calculate the distance d from the current location of the vehicle 10 to the entrance of the highway, and the distance d is equal to or greater than the second threshold value Y. It is determined whether it has changed to less than the second threshold Y (S21). The second threshold Y is set to a value smaller than the first threshold X in S13 of FIG. Note that the processing of S21 is the same as determining the timing when the distance d changes from the second threshold Y or more to less than the second threshold Y. When the distance d is greater than or equal to the second threshold Y (S21: No), the process waits until the distance d changes below the second threshold Y. When the distance d changes below the second threshold Y (S21: Yes), the process proceeds to S22.

  In S22, the smart ECU 30 refers to the storage area for the no key flag and determines whether the no key flag is on (S22). If the no key flag is off (S22: No), the process returns to S21. In this case, it is assumed that there is an electronic key 4 in the passenger compartment, and no key no warning is given.

  If the no key flag is on in S22 (S22: Yes), the process proceeds to S23. In S23, the navigation ECU 60 performs voice guidance such as “Please check if there is a key” on the speaker 64 (see FIG. 1) as a no key warning. In S23, in addition to the voice guidance, a warning may be displayed on the display 63 (see FIG. 1). Thereby, the user (occupant) of the vehicle 10 can confirm the presence or absence of the electronic key 4 before entering the highway. If the user does not have the electronic key 4, the user does not enter the highway, and returns to the home, for example, to get a spare key or contacts the person who has taken the electronic key 4 out of the vehicle 10. The electronic key 4 can be returned to the computer. Therefore, it is possible to prevent a fatal situation (for example, a situation in which the vehicle 10 stops moving when going out). The process of S23 is a process performed at a timing when the distance d changes from the second threshold Y or more to less than the second threshold Y. Therefore, when the timing has passed, even if the distance d is less than the second threshold Y, the process of S23 is not performed. After the process of S23, the process of the flowchart of FIG.

  As described above, in this embodiment, the smart ECU 30 and the navigation ECU 60 are linked to issue a keyless warning. Since the navigation ECU 60 performs various processes related to route guidance based on its own determination, the navigation ECU 60 uses the processes of the navigation ECU 60 to perform asynchronous keyless warnings for user operations at various timings during the traveling process of the vehicle 10. It can be performed. Therefore, it is possible to make it easier for the user to notice that the electronic key 4 is not in the passenger compartment as compared with a keyless warning synchronized with a conventional user operation. In the present embodiment, since there is no key warning in a situation where it is expected to travel on a highway, such as traveling, a fatal situation in which the vehicle 10 stops moving at a travel destination, etc. It can be effectively prevented.

  Further, in this embodiment, since the presence / absence determination of the key is performed at a specific timing (S13: Yes timing), the battery consumption of the electronic key 4 (see FIG. When there is an electronic key in the passenger compartment, it is possible to suppress battery consumption caused by communication many times. Moreover, since the keyless warning is performed at a specific timing (S21: Yes timing), the user's troublesomeness due to the warning can be suppressed as compared with the case where the keyless warning is performed many times during traveling.

  The warning device of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the claims. For example, the process of S13 in FIG. 3 may be omitted. In this case, the presence / absence determination of the key is performed every time it is determined that there is an entrance to the expressway on the route or along the road, so that it is possible to accurately determine whether or not the electronic key 4 is present in the passenger compartment. . Further, a keyless warning may be given in a situation other than the situation of traveling on a highway. In addition, the key presence / absence determination and the key absence warning may be performed at any timing in the vehicle traveling process. Specifically, for example, a key presence determination or a key absence warning may be performed at the timing when the signal of the vehicle 10 stops. In this case, the navigation ECU 60 may determine that the signal of the vehicle 10 has stopped, for example, based on the fact that the vehicle speed of the vehicle 10 has become zero. Further, for example, it may be determined whether there is a key or no key warning at the timing when the navigation ECU 60 searches for a guidance route. In addition, for example, the navigation ECU 60 may determine a timing when the travel distance from the departure point of the current travel is equal to or greater than a predetermined distance expected to be a long trip, and may perform a key presence determination or a key absence warning at that timing. Note that a keyless warning may be issued at a plurality of timings.

  In the above embodiment, the smart ECU 30 and the navigation ECU 60 correspond to the “warning device” of the present invention. The door ECU 75 and the engine ECU 76 correspond to the “on-vehicle device” in the present invention. The navigation ECU 60 corresponds to the “trigger generating means” and the “car navigation device” in the present invention. The smart ECU 30 that executes the process of S14 in FIG. 3 corresponds to the “key presence / absence determining means” in the present invention. The navigation ECU 60 that executes the process of S23 in FIG. 4 corresponds to “warning means” in the present invention. The navigation ECU 60 that executes the processes of S11, S12, S13, and S16 in FIG. 3 corresponds to “acquisition means” and “first situation determination means” in the present invention. The navigation ECU 60 that executes the process of S21 in FIG. 4 corresponds to the “second situation determination unit” in the present invention. Further, the situation where S13 is Yes corresponds to the “first situation” in the present invention. The situation where S21 is Yes corresponds to the “second situation” in the present invention.

3, 4 Smart entry system (electronic key system)
6 Navigation system 4 Electronic key 10 Vehicle 30 Smart ECU
60 Navi ECU

Claims (3)

A warning that gives a keyless warning, which is a warning that there is no electronic key in the vehicle compartment of a vehicle equipped with an electronic key system that permits the operation of a predetermined on-vehicle device provided that there is an electronic key in the vehicle compartment. A device,
Obtaining means for obtaining information of a travel route of the vehicle;
A first situation determination means for determining whether or not the traveling situation of the vehicle is a first situation where an entrance of a highway is on the traveling route indicated by the information;
A key presence / absence determining means for determining whether or not the electronic key is present in a vehicle interior when the traveling state of the vehicle is the first situation ;
A warning device comprising: warning means for giving a key absence warning to a user of the vehicle based on the fact that the key presence / absence determination means determines that the electronic key is not in a vehicle interior. The first situation determination means determines whether there is an entrance of an expressway on the travel route and whether the distance from the current location of the vehicle to the entrance is less than a predetermined first threshold. The warning device according to claim 1, wherein it is determined as to whether or not . Based on the information, the traveling state of the vehicle has a highway entrance on the travel route, and a distance from the current location of the vehicle to the entrance is less than a predetermined second threshold value smaller than the first threshold value. A second situation judging means for judging whether or not there are two situations;
The warning means determines that the key presence / absence determination means determines that the electronic key is not in the vehicle interior, and the second situation determination means determines that the traveling situation of the vehicle is the second situation. The warning device according to claim 2, wherein a warning without a key is performed .

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