JP6365433B2 - Wireless communication system - Google Patents

Description

  The present invention relates to a wireless communication system mounted on a vehicle.

  2. Description of the Related Art Conventionally, a wireless communication system is known in which when a power switch is pressed, a vehicle-mounted device and a portable device perform wireless communication, and an engine is started when ID verification is established.

  A wireless communication system is described in Patent Document 1, for example. In this wireless communication system, when the portable device is taken out of the vehicle, the vehicle-mounted device (remote operation transmission / reception device) determines whether the engine is started. When the vehicle-mounted device determines that the engine has been started, the vehicle-mounted device transmits a warning signal to the outside of the vehicle, and the portable device that has received the warning signal issues a warning.

JP 2003-314107 A

  However, in the conventional technique described in Patent Document 1, since the vehicle-mounted device determines whether or not the engine is started, the portable device cannot receive the warning signal transmitted from the vehicle-mounted device. In some cases, there was a problem that warnings could not be made.

  The present invention has been made in view of the above problems, and provides a wireless communication system capable of determining whether or not the portable device itself issues an alarm when the portable device is taken out of the vehicle. With the goal.

  A wireless communication system in which a vehicle-mounted device and a portable device perform wireless communication, and the vehicle-mounted device transmits power state information indicating a power state of the vehicle to the portable device when a power switch is pressed by an occupant. In-vehicle wireless communication unit and in-vehicle wireless communication unit for transmitting radio waves to the outside of the vehicle. When the portable device receives a radio wave transmitted from the memory unit for storing power status information and the external wireless communication unit In addition, based on the power supply state information stored in the memory unit, a determination unit that determines that an alarm needs to be issued when the power supply state of the vehicle is other than OFF, and a determination unit determines that an alarm needs to be issued And an alarm unit that issues an alarm after a predetermined time has elapsed.

  In the present invention, when the portable device receives a radio wave transmitted from the external wireless communication unit, an alarm is issued if the power state of the vehicle is other than off based on the power state information stored in the memory unit. It is provided with a determination unit that determines that it is necessary to issue. For this reason, when the portable device is taken out, it can be determined whether or not the portable device itself issues an alarm.

  According to the present invention, when the portable device is taken out of the vehicle, the portable device itself can determine whether or not to issue an alarm.

Block diagram of radio communication system according to embodiment The flowchart which shows the storing process of power supply status information Flow chart showing alarm processing The flowchart which shows the alarm process which concerns on a modification

  Hereinafter, embodiments will be described in detail with reference to FIGS.

[Overview]
In the wireless communication system according to the present embodiment, when the power switch is pressed by an occupant and the power state of the vehicle is switched, the portable device stores the switched power state. For this reason, when the portable device is taken out of the vehicle, the portable device can determine whether or not to issue a warning based on the stored power state.

[Configuration of wireless communication system]
FIG. 1 is a block diagram of a wireless communication system 1 according to the present embodiment. The wireless communication system 1 includes a power switch 21, a vehicle-mounted device 10, and a portable device 40 (such as an electronic key or a smart key). Hereinafter, each structure of the radio | wireless communications system 1 is demonstrated.

  The power switch 21 is a switch that is provided on, for example, a dashboard and is operated by a passenger. When the power switch 21 is pressed, the power supply state of the vehicle 30 is switched. The power state is, for example, four power states of “engine start”, “IG on”, “ACC”, and “off” in the case of a vehicle having only a gasoline engine. When the power switch 21 is pressed, an operation signal is transmitted to the vehicle-mounted machine 10.

  The vehicle-mounted device 10 includes an in-vehicle wireless communication unit 11, an out-of-vehicle wireless communication unit 12, a memory unit 13, and a verification unit 14. The in-vehicle wireless communication unit 11 transmits radio waves into the vehicle and performs wireless communication with the portable device 40 brought into the vehicle. The on-vehicle wireless communication unit 12 transmits radio waves to the outside of the vehicle and performs wireless communication with the portable device 40 taken out of the vehicle. The memory unit 13 stores in advance an ID code 13 a that is exclusive to the vehicle 30.

  The collation unit 14 collates the ID code. Further, the matching unit 14 transmits information on the power state of the vehicle 30 to the portable device 40 based on the operation signal transmitted from the power switch 21. Specifically, for example, when the operation signal is a signal for switching the power state from “off” to “engine start”, the collation unit 14 provides information indicating that the power state of the vehicle 30 is “engine start”. To the portable device 40.

  The portable device 40 includes a wireless communication unit 41, a memory unit 42, a determination unit 43, a timer unit 44, and an alarm unit 45. The wireless communication unit 41 transmits radio waves and performs wireless communication with the vehicle-mounted device 10. The memory unit 42 stores in advance an ID code 42 a that is exclusive to the vehicle corresponding to the portable device 40. In addition, information on the power state of the vehicle 30 transmitted from the vehicle-mounted machine 10 is stored in the memory unit 42 as power state information 42b.

  The determination unit 43 determines whether or not to issue an alarm based on the power supply state information 42b. When the determination unit 43 determines that it is necessary to issue an alarm, the timer unit 44 measures a predetermined time set in advance.

  The alarm unit 45 is, for example, a buzzer device that warns by a buzzer, a vibration device that warns by vibration, or an LED device that warns by lighting or flashing light. The alarm unit 45 issues an alarm when a predetermined time set in the timer unit 44 has elapsed. Note that the alarm unit 45 may notify the alarm to a mobile terminal possessed by the owner of the vehicle 30, for example, a mobile terminal such as a smartphone.

[Storing power status information]
Next, the power status information storage process performed by the wireless communication system 1 will be described. FIG. 2 is a flowchart showing the storage process of the power state information.

  First, in step S11, the collation unit 14 determines whether or not the power switch 21 has been pressed. Specifically, the collation unit 14 determines that the power switch 21 has been pressed when the operation signal transmitted from the power switch 21 is received. If the power switch 21 is pressed, the process proceeds to step S12.

  Subsequently, in step S <b> 12, the collation unit 14 determines based on the operation signal transmitted from the power switch 21 whether or not the power supply switching operation requires ID code collation. The power supply switching operation that requires ID code verification is set for each vehicle. For example, the power supply switching operation that requires ID code verification is when the power supply state is changed from “OFF” to “engine start” or “ACC”. In the case of a power switching operation that requires ID code verification, the process proceeds to step S13, and in the case of a power switching operation that does not require ID code verification, the process proceeds to step S14.

  Subsequently, in step S13, the collation unit 14 determines whether or not collation of the ID code is established. Specifically, the verification unit 14 transmits a request signal to the portable device 40 via the in-vehicle wireless communication unit 11. The portable device 40 that has received the request signal transmits the ID code 42 a to the vehicle-mounted device 10. Then, the collation unit 14 collates the received ID code 42 a with the ID code 13 a stored in the memory unit 13. If collation is established, the process proceeds to step S14. If collation is not established, the process ends.

  Subsequently, in step S <b> 14, the collation unit 14 transmits power state information to the portable device 40 via the in-vehicle wireless communication unit 11. Subsequently, in step S15, the portable device 40 stores the received power state information as power state information 42b in the memory unit 42, and the process ends.

[Alarm processing]
Next, alarm processing performed by the wireless communication system 1 will be described. FIG. 3 is a flowchart showing the alarm process.

  First, in step S21, the determination unit 43 determines whether the portable device 40 has been taken out of the vehicle. Specifically, the determination unit 43 determines that the portable device 40 has been taken out of the vehicle when the wireless communication unit 41 receives a radio wave transmitted from the external wireless communication unit 12. When the portable device 40 is taken out of the vehicle, the process proceeds to step S22.

  Subsequently, in step S <b> 22, the determination unit 43 determines whether the power state of the vehicle 30 is other than OFF based on the power state information 42 b stored in the memory unit 42. When the power state of the vehicle 30 is other than OFF, the process proceeds to step S23, and when the power state of the vehicle 30 is OFF, the process ends.

  Subsequently, in step S23, the timer unit 44 starts a timer. Subsequently, in step S24, the timer unit 44 determines whether a predetermined time set in advance has elapsed. When the predetermined time has elapsed, the process proceeds to step S25.

  Subsequently, in step S25, the alarm unit 45 issues an alarm and the process ends. Note that the alarm unit 45 may activate the alarm more strongly than in other power supply states because the importance is high when the power supply state of the vehicle is “engine start”.

[Effect of the embodiment]
In the present embodiment, when the portable device 40 receives a radio wave transmitted from the vehicle exterior wireless communication unit 12, the power state of the vehicle 30 is turned off based on the power state information 42 b stored in the memory unit 42. In other words, a determination unit 43 that determines that an alarm needs to be issued is provided. For this reason, when the portable device 40 is taken out, it can be determined whether or not the portable device 40 itself issues an alarm.

[Modification]
FIG. 4 is a flowchart showing alarm processing according to the modification. In the modification, steps S26 and S27 are added to the alarm processing according to the embodiment shown in FIG.

  In the alarm processing according to the modified example, after the timer unit 44 starts the timer in step S23, it is determined whether or not the portable device 40 has been brought into the vehicle in step S26. Specifically, the determination unit 43 determines that the portable device 40 has been brought into the vehicle when the wireless communication unit 41 receives a radio wave transmitted from the in-vehicle wireless communication unit 11. When the portable device 40 is brought into the vehicle, the process proceeds to step S27, and when the portable device 40 is not carried into the vehicle, the process proceeds to step S24.

  Subsequently, in step S27, the timer unit 44 resets the timer, and the process ends.

  According to the alarm processing according to the modified example, the occupant carrying the portable device 40 gets on again after the predetermined time set in the timer unit 44 elapses after the vehicle 30 gets off the vehicle in a state other than “OFF”. If you do, the alarm will not be activated. For this reason, for example, since the alarm is not activated when refueling or the like, the troublesomeness of the occupant is suppressed.

  The present invention is applicable to a wireless communication system mounted on a vehicle.

DESCRIPTION OF SYMBOLS 1 Wireless communication system 10 Vehicle mounted machine 21 Power switch 40 Portable machine 42 Memory part 43 Judgment part 44 Timer part 45 Alarm part

Claims (1)

A wireless communication system in which a vehicle-mounted device and a portable device perform wireless communication,
The vehicle-mounted machine is
When the power switch is pressed by an occupant, an in-vehicle wireless communication unit that transmits power state information indicating the power state of the vehicle to the portable device, and
With an external wireless communication unit that transmits radio waves outside the vehicle,
The portable device is
A memory unit for storing the power status information;
When receiving a radio wave transmitted from the vehicle exterior wireless communication unit, based on the power state information stored in the memory unit, it is necessary to issue an alarm when the vehicle power state is other than OFF A judgment unit for judging;
A wireless communication system comprising: an alarm unit that issues an alarm after a predetermined time has elapsed since the determination unit determined that an alarm needs to be issued.

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