Mobile device, driving support system, control method, and control program

Abstract

To provide a portable machine, a driving support system, a control method, and a control program that secure users's convenience without impairing security of a vehicle, in cases when driving support is implemented under the condition that a portable machine conducting locking and unlocking of a vehicle door has been detected.SOLUTION: A portable machine includes: an unlocking part that is operable to unlock a vehicle door; and a change part that, when reception sensitivity of a prescribed signal transmitted through radio communication from the vehicle is a first sensitivity, changes the reception sensitivity to a second sensitivity having higher reception sensitivity than the first sensitivity.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a mobile device, a driving support system, a control method, and a control program.

Background Art

[0002] Patent Document 1 discloses a parking support device capable of finely adjusting the parking position of a vehicle.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The technology of Patent Document 1 executes parking support control to automatically park a vehicle at a target position by the vehicle receiving a signal related to a remote operation from a remote terminal such as a smartphone.

[0005] Here, in order to identify that it is a driving support operation by a regular user of the vehicle, on the condition that a mobile device capable of performing operations such as unlocking and locking the vehicle door receives a predetermined signal from the vehicle, it is assumed that driving support for moving the vehicle forward or backward can be executed according to the operation of the remote terminal. However, if the user who owns the mobile device is separated from the vehicle by a predetermined distance or more, the mobile device cannot receive the predetermined signal and driving support cannot be executed.

[0006] In the above case, in order to cause the mobile device to receive a predetermined signal, it is assumed that the user who holds the mobile device approaches within a predetermined distance or increases the reception sensitivity of the mobile device so that the predetermined signal can be received. However, in the former case, it is necessary to approach within the predetermined distance, which is not convenient for the user. Therefore, in the above case, in order to cause the mobile device to receive a predetermined signal, it is desirable to increase the reception sensitivity of the latter mobile device.

[0007] Further, when increasing the reception sensitivity of the mobile device, if it is conditioned that the lock button for locking the vehicle door provided in the mobile device is operated, unlocking of the door based on the operation of the door button by a third party who is not a legitimate user while the user recognizes that the door is locked becomes possible, which is not desirable from the viewpoint of security.

[0008] Therefore, an object of the present invention is to provide a mobile device, a driving support system, a control method, and a control program that can ensure the convenience of the user without impairing the security of the vehicle when executing driving support on the condition that a mobile device for locking and unlocking the vehicle door is detected.

Means for Solving the Problems

[0009] The mobile device according to claim 1 includes an unlocking unit capable of operating to unlock the vehicle door, and a changing unit that changes the reception sensitivity of a predetermined signal transmitted wirelessly from the vehicle to a second sensitivity higher than the first sensitivity when the unlocking unit is operated when the reception sensitivity of the predetermined signal is the first sensitivity. , when a predetermined time has elapsed after the changing unit changes the reception sensitivity to the second sensitivity, the changing unit changes the reception sensitivity to the first sensitivity 。

[0010] The mobile device according to claim 1 includes an unlocking unit capable of performing an operation for unlocking the door of a vehicle. And when the unlocking unit is operated when the reception sensitivity of a predetermined signal transmitted wirelessly from the vehicle is the first sensitivity, the changing unit changes it to a second sensitivity having a higher reception sensitivity than the first sensitivity. Thereby, in this mobile device, since the reception sensitivity is changed to the second sensitivity in a state where the user of the vehicle recognizes that the door has been unlocked, when performing driving support on the condition that the mobile device has been detected, the convenience of the user can be ensured without impairing the security of the vehicle. Also, in the mobile device according to claim 1, when a predetermined time has elapsed after the changing unit changes the reception sensitivity to the second sensitivity, the changing unit changes the reception sensitivity to the first sensitivity. Thereby, even if the user of the vehicle forgets that the reception sensitivity has been changed to the second sensitivity in the mobile device, the reception sensitivity is automatically changed to the first sensitivity after the predetermined time has elapsed, so that the security risk to the vehicle can be reduced.

[0013] Claim 2 The mobile device according to claim 1 to includes a locking unit capable of performing an operation for locking the door of the vehicle. When the locking unit is operated when the reception sensitivity is the second sensitivity, the changing unit changes the reception sensitivity to the first sensitivity.

[0014] Claim 2 The mobile device according to claim 1 includes a locking unit capable of performing an operation for locking the door of the vehicle. And when the locking unit is operated when the reception sensitivity is the second sensitivity, the changing unit changes the reception sensitivity to the first sensitivity. Thereby, in this mobile device, since the reception sensitivity can be changed to the first sensitivity according to the operation of the mobile device, when the user leaves the vehicle and changes the reception sensitivity to the first sensitivity, the security risk to the vehicle can be reduced.

[0015] Claim 3 The driving support system according to claim 1 or 2 includes the mobile device according to claim 1, a vehicle capable of wireless communication with the mobile device, and a user terminal capable of communicating with the vehicle. When the vehicle confirms that the mobile device has received the transmitted predetermined signal, the vehicle executes driving support for moving the vehicle forward or backward according to the operation of the user terminal.

[0016] Claim 3In the driving support system according to the present invention, when the vehicle confirms that the portable device has received the transmitted predetermined signal, the vehicle executes driving support for moving forward or backward in response to an operation of the user terminal. Accordingly, in the driving support system, when executing driving support for moving forward or backward in response to an operation of the user terminal on the condition that the portable device has been detected in a situation where the user of the vehicle is outside the vehicle, it is possible to ensure the convenience of the user without impairing the security of the vehicle.

[0017] Claim 4 The control method according to the present invention receives an operation for unlocking the door of the vehicle, and when the operation is performed when the reception sensitivity of a predetermined signal transmitted wirelessly from the vehicle is a first sensitivity, the control method changes the reception sensitivity to a second sensitivity higher than the first sensitivity. and when a predetermined time has elapsed after the reception sensitivity is changed to the second sensitivity, the reception sensitivity is changed to the first sensitivity The computer executes the process.

[0018] Claim 5 The control program according to the present invention causes a computer to receive an operation for unlocking the door of the vehicle, and when the operation is performed when the reception sensitivity of a predetermined signal transmitted wirelessly from the vehicle is a first sensitivity, the control program changes the reception sensitivity to a second sensitivity higher than the first sensitivity. and when a predetermined time has elapsed after the reception sensitivity is changed to the second sensitivity, the reception sensitivity is changed to the first sensitivity The computer is caused to execute the process.

Advantages of the Invention

[0019] As described above, in the portable device, driving support system, control method, and control program according to the present invention, when executing driving support on the condition that a portable device for locking and unlocking the door of the vehicle has been detected, it is possible to ensure the convenience of the user without impairing the security of the vehicle.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0021] Hereinafter, the driving support system 10 according to this embodiment will be described. FIG. 1 is a diagram showing the schematic configuration of the driving support system 10 according to this embodiment.

[0022] As shown in FIG. 1, the driving support system 10 includes a vehicle 20, an electronic key 50, and a user terminal 70. The vehicle 20 can communicate wirelessly with each of the electronic key 50 and the user terminal 70.

[0023] The vehicle 20 may be any of a gasoline vehicle, a hybrid vehicle, or an electric vehicle. In this embodiment, as an example, the vehicle 20 is a gasoline vehicle.

[0024] The electronic key 50 is a portable device held by the user of the vehicle 20, and can perform remote operations (e.g., locking and unlocking of the door) of the vehicle 20 via wireless communication with the vehicle 20. The electronic key 50 is an example of a "portable device".

[0025] The user terminal 70 is a mobile terminal owned by the user of the vehicle 20. As an example, a portable personal computer (notebook PC), a smartphone, a tablet terminal, or the like is applied to the user terminal 70. In the present embodiment, as an example, the user terminal 70 is a smartphone.

[0026] Next, the hardware configuration of the vehicle 20 will be described. FIG. 2 is a block diagram showing the hardware configuration of the vehicle 20.

[0027] As shown in FIG. 2, the vehicle 20 includes an in-vehicle device 15, a plurality of ECUs (Electronic Control Units) 30, an LF (Low Frequency) transmission unit 31, an RF (Radio Frequency) reception unit 32, actuators 33 to 36, a microphone 40, a camera 41, a sonar sensor 42, an input switch 43, a monitor 44, a speaker 45, and a GPS device 46.

[0028] The in-vehicle device 15 includes a CPU 21 (Central Processing Unit), a ROM 22 (Read Only Memory), a RAM 23 (Random Access Memory), a storage unit 24, an in-vehicle communication I / F (InterFace) 25, an input / output I / F 26, and a wireless communication I / F 27. The CPU 21, the ROM 22, the RAM 23, the storage unit 24, the in-vehicle communication I / F 25, the input / output I / F 26, and the wireless communication I / F 27 are communicably connected to each other via an internal bus 28.

[0029] The CPU 21 is a central processing unit that executes various programs and controls each unit. That is, the CPU 21 reads a program from the ROM 22 or the storage unit 24 and executes the program using the RAM 23 as a work area. The CPU 21 performs control of the above-described respective configurations and various arithmetic processes according to the program recorded in the ROM 22 or the storage unit 24.

[0030] The ROM 22 stores various programs and various data. The RAM 23 temporarily stores programs or data as a working area.

[0031] The storage unit 24 is composed of a storage device such as an HDD (Hard Disk Drive), an SSD (Solid State Drive), or a flash memory, and stores various programs and various data. In the present embodiment, vehicle ID information, which is information of an ID (Identification) unique to the vehicle 20, is stored in the storage unit 24.

[0032] The in-vehicle communication I / F 25 is an interface for connecting to the ECU 30. The communication standard based on the CAN protocol is used for the interface. The in-vehicle communication I / F 25 is connected to the external bus 29.

[0033] A plurality of ECUs 30 are provided for each function of the vehicle 20. In the present embodiment, a collation ECU 30A, a drive ECU 30B, a steering ECU 30C, a brake ECU 30D, and a shift ECU 30E are provided.

[0034] An LF transmission unit 31 and an RF reception unit 32 are connected to the collation ECU 30A. The LF transmission unit 31 is a communication unit that performs wireless communication in the LF band, and transmits an LF signal, which is an LF-band radio wave, toward an LF reception unit 65 described later. The LF transmission unit 31 is installed at a plurality of locations on the vehicle 20. The LF signal is an example of a "predetermined signal".

[0035] The RF reception unit 32 is a communication unit that performs wireless communication in the RF band, and receives an RF signal, which is an RF-band radio wave, from an RF transmission unit 66 described later.

[0036] The drive ECU 30B has an actuator 33 connected thereto. The actuator 33 includes, as an example, an electric motor, an engine, and the like. In the present embodiment, by controlling the actuator 33 by the drive ECU 30B, the vehicle 20 can be made to travel without the driver operating the accelerator pedal.

[0037] The steering ECU 30C has an actuator 34 connected thereto. The actuator 34 includes, as an example, an electric power steering device. In the present embodiment, by controlling the actuator 34 by the steering ECU 30C, the steering wheel can be steered and the vehicle 20 can be turned without the driver operating the steering wheel.

[0038] The brake ECU 30D has an actuator 35 connected thereto. The actuator 35 includes, as an example, a brake actuator that operates the brake by electromagnetic driving force. In the present embodiment, by controlling the actuator 35 by the brake ECU 30D, the vehicle 20 can be stopped without the driver operating the brake pedal.

[0039] The shift ECU 30E has an actuator 36 connected thereto. The actuator 36 includes, as an example, a shift actuator that switches the shift position (D, R, P, etc.) of the drive transmission mechanism, switches between shift lock and shift lock release, and the like. In the present embodiment, by controlling the actuator 36 by the shift ECU 30E, the shift position can be switched, the shift lock can be set, or the shift lock can be released without the driver operating the shift lever.

[0040] The input / output I / F 26 is an interface for communicating with a microphone 40, a camera 41, a sonar sensor 42, an input switch 43, a monitor 44, a speaker 45, and a GPS device 46 mounted on the vehicle 20.

[0041] The microphone 40 is a device that is provided on the front pillar of the vehicle 20, or on the dashboard or the like, and collects the sound uttered by the user of the vehicle 20. Note that the microphone 40 may be provided in the camera 41 described later.

[0042] The camera 41 is configured to include solid-state imaging devices such as a CCD (Charge Coupled Device) image sensor and a CMOS (Complementary Metal Oxide Semiconductor) image sensor, for example. The camera 41 is provided at the front part of the vehicle 20, for example, and images the front of the vehicle. Then, the image captured by the camera 41 is used to recognize, for example, the inter-vehicle distance from the preceding vehicle traveling ahead of the vehicle, the lane, and the traffic signal. The image captured by the camera 41 is stored in the storage unit 24. Note that the camera 41 may be configured as an imaging device for other purposes such as a drive recorder. Further, the camera 41 may be connected to the in-vehicle device 15 via the ECU 30 (for example, a camera ECU).

[0043] The sonar sensor 42 is a device that is provided at the four corners or the like of the vehicle 20 and detects the distance between the vehicle 20 and an obstacle using ultrasonic waves.

[0044] The input switch 43 is a switch that is provided on the instrument panel, the center console, the steering wheel, or the like, and inputs an operation by the driver's finger. As the input switch 43, for example, a push-button type numeric keypad and a touch pad or the like can be adopted.

[0045] The monitor 44 is a liquid crystal monitor that is provided on the instrument panel, the meter panel, or the like, and displays a proposal for the operation related to the function of the vehicle 20 and an image related to the explanation of the function. The monitor 44 may be provided as a touch panel that also serves as the input switch 43.

[0046] The speaker 45 is a device provided on the instrument panel, center console, front pillar, dashboard, or the like, and outputs a voice for proposing an operation related to the function of the vehicle 20 and explaining the function. Note that the speaker 45 may be provided on the monitor 44.

[0047] The GPS device 46 is a device that measures the current position of the vehicle 20. The GPS device 46 includes an antenna (not shown) that receives signals from GPS satellites. Note that the GPS device 46 may be connected to the in-vehicle unit 15 via a car navigation system connected to the ECU 30 (for example, a multimedia ECU).

[0048] The wireless communication I / F 27 is a communication unit that performs wireless communication using Bluetooth (registered trademark), and performs BLE (Bluetooth (registered trademark) Low Energy) communication with the communication unit 77 described later.

[0049] Next, the hardware configuration of the electronic key 50 will be described. FIG. 3 is a block diagram showing the hardware configuration of the electronic key 50.

[0050] As shown in FIG. 3, the electronic key 50 includes a microcomputer 60, an LF reception unit 65, an RF transmission unit 66, a locking button 67, and an unlocking button 68.

[0051] The microcomputer 60 includes a CPU 61, a ROM 62, a RAM 63, and a storage unit 64. The storage unit 64 stores at least a control program 64A for executing the setting process described later and key ID information 64B which is information of an ID unique to the electronic key 50.

[0052] The LF reception unit 65 is a communication unit that performs wireless communication in the LF band and receives an LF signal from the LF transmission unit 31.

[0053] The RF transmission unit 66 is a communication unit that performs wireless communication in the RF band and transmits an RF signal to the RF reception unit 32.

[0054] The locking button 67 is a button that can be operated to lock the door of the vehicle 20. The locking button 67 is an example of a "locking part".

[0055] The unlocking button 68 is a button that can be operated to unlock the door of the vehicle 20. The unlocking button 68 is an example of an "unlocking part".

[0056] Note that the doors that are locked when the locking button 67 is operated or unlocked when the unlocking button 68 is operated are the driver's door on the driver's seat side, the passenger's door on the passenger's seat side, and the rear door at the rear of the vehicle 20.

[0057] In the electronic key 50, when the locking button 67 is operated, the RF transmission unit 66 transmits an RF signal including a locking request to lock the door. Also, in the electronic key 50, when the unlocking button 68 is operated, the RF transmission unit 66 transmits an RF signal including an unlocking request to unlock the door.

[0058] On the other hand, in the vehicle 20, when an RF signal including a locking request is received, the in-vehicle unit 15 controls a door lock device (not shown) to lock all the doors. Also, in the vehicle 20, when an RF signal including an unlocking request is received, the in-vehicle unit 15 controls the door lock device to unlock all the doors.

[0059] Also, in the vehicle 20, not only operations on the electronic key 50 but also operations on door buttons provided on the driver's door and the passenger's door, etc., by the user who holds the electronic key 50 can lock and unlock the doors. In this case, the electronic key 50 notifies that it exists within a range where it can receive the LF signal from the vehicle 20 by transmitting an RF signal to the vehicle 20 based on receiving the LF signal transmitted from the vehicle 20. Then, when an operation on the door button by the user is performed when the vehicle 20 receives the RF signal transmitted from the electronic key 50, the in-vehicle unit 15 controls the door lock device to lock or unlock all the doors.

[0060] Here, the electronic key 50 has two types of reception sensitivities for the LF signal transmitted from the vehicle 20, namely, a standard sensitivity and a high sensitivity with a higher reception sensitivity than the standard sensitivity. The standard sensitivity is an example of the "first sensitivity", and the high sensitivity is an example of the "second sensitivity". In this embodiment, it is set to the standard sensitivity during normal times, but when the unlock button 68 is operated while the sensitivity is the standard sensitivity, it is changed from the standard sensitivity to the high sensitivity. When the reception sensitivity of the electronic key 50 becomes high, even if the signal intensity of the LF signal transmitted from the vehicle 20 is the same, the LF signal can be received at a position farther from the vehicle 20 than the standard sensitivity. Details of this will be described later.

[0061] Next, the functional configuration of the electronic key 50 will be described. FIG. 4 is a block diagram showing an example of the functional configuration of the electronic key 50.

[0062] As shown in FIG. 4, the CPU 61 of the electronic key 50 has a change section 61A and a measurement section 61B as functional configurations. Each functional configuration is realized by the CPU 61 reading and executing the control program 64A stored in the storage section 64.

[0063] When the unlock button 68 is operated while the reception sensitivity of the LF signal is the standard sensitivity, the change section 61A changes it to a high sensitivity with a higher reception sensitivity than the standard sensitivity. The LF reception section 65 has an amplifier for changing the reception sensitivity, and the reception sensitivity changes by adjusting the amount of current flowing through the amplifier. The change section 61A increases the amount of current flowing through the amplifier to increase the reception sensitivity and changes it from the standard sensitivity to the high sensitivity.

[0064] Also, when a predetermined time has elapsed after the reception sensitivity of the LF signal is changed to the high sensitivity, the change section 61A changes the reception sensitivity to the standard sensitivity. Further, when the lock button 67 is operated while the reception sensitivity of the LF signal is the high sensitivity, the change section 61A changes the reception sensitivity to the standard sensitivity. As described above, when changing the reception sensitivity from the high sensitivity to the standard sensitivity, the change section 61A decreases the amount of current flowing through the amplifier to lower the reception sensitivity and changes it from the high sensitivity to the standard sensitivity.

[0065] The measurement unit 61B has a timer that measures the elapsed time since the reception sensitivity was set to high sensitivity. Each time the measurement unit 61B measures the elapsed time, it resets the timer and starts the measurement.

[0066] Next, the hardware configuration of the user terminal 70 will be described. FIG. 5 is a block diagram showing the hardware configuration of the user terminal 70.

[0067] As shown in FIG. 5, the user terminal 70 includes a CPU 71, a ROM 72, a RAM 73, a storage unit 74, an input unit 75, a display unit 76, and a communication unit 77. Each component is connected to be communicable with each other via a bus 78.

[0068] The CPU 71 is a central processing unit that executes various programs and controls each unit. That is, the CPU 71 reads a program from the ROM 72 or the storage unit 74 and executes the program using the RAM 73 as a work area. The CPU 71 performs control of the above components and various arithmetic processes according to the program recorded in the ROM 72 or the storage unit 74.

[0069] The ROM 72 stores various programs and various data. The RAM 73 temporarily stores a program or data as a work area.

[0070] The storage unit 74 is composed of a storage device such as an HDD, an SSD, or a flash memory, and stores various programs and various data.

[0071] The input unit 75 includes various buttons, a microphone, a camera, etc., and is used to perform various inputs.

[0072] The display unit 76 is, for example, a liquid crystal display, and displays various information. The display unit 76 adopts a touch panel method and also functions as the input unit 75.

[0073] The communication unit 77 is a communication unit that performs wireless communication using Bluetooth (registered trademark), and performs BLE communication with the wireless communication I / F 27.

[0074] FIG. 6 is a flowchart showing the flow of a setting process for setting the reception sensitivity of the electronic key 50. The setting process is performed by the CPU 61 reading the control program 64A from the storage unit 64, expanding it in the RAM 63, and executing it. It is assumed that the reception sensitivity before the setting process is performed is set to the standard sensitivity.

[0075] In step S10 shown in FIG. 6, the CPU 61 determines whether a high-sensitivity setting has been received. If it is determined that a high-sensitivity setting has been received (step S10: YES), the process proceeds to step S11. On the other hand, if it is determined by the CPU 61 that a high-sensitivity setting has not been received (step S10: NO), the process proceeds to step S16. As an example, the CPU 61 determines that a high-sensitivity setting has been received when the unlock button 68 is operated by the user of the vehicle 20.

[0076] In step S11, the CPU 61 sets the reception sensitivity to high sensitivity. Then, the process proceeds to step S12.

[0077] In step S12, the CPU 61 performs a timer setting. Then, the process proceeds to step S13. The CPU 61, as a timer setting, resets the timer and then starts measuring the elapsed time since the reception sensitivity was set to high sensitivity.

[0078] In step S13, the CPU 61 determines whether a high-sensitivity setting has been received. If it is determined that a high-sensitivity setting has been received (step S13: YES), the process returns to step S12. On the other hand, if it is determined by the CPU 61 that a high-sensitivity setting has not been received (step S13: NO), the process proceeds to step S14.

[0079] In step S14, the CPU 61 determines whether it has received a sensitivity reset. If it determines that it has received a sensitivity reset (step S14: YES), it proceeds to step S16. On the other hand, if it is determined by the CPU 61 that a sensitivity reset has not been received (step S14: NO), it proceeds to step S15. As an example, the CPU 61 determines that it has received a sensitivity reset when the locking button 67 is operated by the user of the vehicle 20.

[0080] In step S15, the CPU 61 determines whether a predetermined time has elapsed since the start of the timer measurement in step S12. If it determines that the predetermined time has elapsed (step S15: YES), it proceeds to step S16. On the other hand, if it is determined by the CPU 61 that the predetermined time has not elapsed (step S15: NO), it returns to step S13.

[0081] In step S16, the CPU 61 sets the reception sensitivity to the standard sensitivity. Then, the setting process ends.

[0082] Next, the process of locking or unlocking the door of the vehicle 20 when the user holding the electronic key 50 operates the door button will be described. Hereinafter, as an example, the process of unlocking the door of the vehicle 20 when the user operates the door button will be described. The unlocking of the door can be executed when the vehicle 20 successfully authenticates the electronic key 50.

[0083] Here, the authentication of the electronic key 50 is performed, for example, as follows. The collation ECU 30A transmits an LF signal from the LF transmission unit 31 toward the LF reception unit 65. When the LF reception unit 65 of the electronic key 50 receives the LF signal, the CPU 61 of the electronic key 50 transmits an RF signal including the key ID information 64B from the RF transmission unit 66 toward the RF reception unit 32.

[0084] The verification ECU 30A verifies the key ID information 64B and the vehicle ID information stored in the storage unit 24, and determines that the authentication of the electronic key 50 is successful when the verification between the key ID information 64B and the vehicle ID information is successful. On the other hand, the verification ECU 30A determines that the authentication of the electronic key 50 has failed when the RF signal is not received within a predetermined time from the transmission of the LF signal, or when the verification between the key ID information 64B and the vehicle ID information fails.

[0085] FIG. 7 is a first explanatory diagram of the driving support system 10. FIG. 7 shows a situation where the door of the vehicle 20 is unlocked by a user operating a door button when the reception sensitivity of the LF signal is the standard sensitivity.

[0086] Here, in FIG. 7, three vehicles 20, namely vehicle 20A, vehicle 20B, and vehicle 20C, are parked in parallel. Also, the user U shown in FIG. 7 is the driver of vehicle 20A and operates the door button of vehicle 20A. Further, the range R1 indicated by the dashed line in FIG. 7 shows the range within which the LF signal transmitted from vehicle 20A can be received when the reception sensitivity of the LF signal of the electronic key 50 held by the user U is the standard sensitivity.

[0087] First, in order to unlock the door of vehicle 20A, the user U approaches vehicle 20A within the range R1. When the user U enters the range R1, the electronic key 50 held by the user U receives the LF signal transmitted from vehicle 20A and transmits an RF signal including the key ID information 64B to vehicle 20A. Vehicle 20A that has received the RF signal verifies the key ID information 64B and the vehicle ID information stored in the storage unit 24, and determines that the authentication of the electronic key 50 is successful when the verification between the key ID information 64B and the vehicle ID information is successful. As a result, it becomes possible to unlock the door of vehicle 20A by operating the door button of vehicle 20A.

[0088] Then, the user U operates the door button of vehicle 20A. Thereby, the in-vehicle device 15 of vehicle 20A controls the door lock device so that all doors are in the unlocked state.

[0089] Next, the driving support of the vehicle 20 executed by the driving support system 10 will be described. The driving support is to move the vehicle 20 forward or backward according to the operation of the user terminal 70 when the user of the vehicle 20 is outside the vehicle. The driving support can be executed when the vehicle 20 successfully authenticates the electronic key 50, similar to when the door of the vehicle 20 is unlocked by the operation of the user of the electronic key 50 held by the user on the door button shown in FIG. 7. When the vehicle 20 successfully authenticates the electronic key 50, it is an example of "when it is confirmed that the portable device has received a predetermined signal".

[0090] FIG. 8 is a second explanatory diagram of the driving support system 10. FIG. 8 shows a situation where a driving support (hereinafter referred to as "remote departure") is performed to move the vehicle 20 forward according to the operation of the user terminal 70 when the reception sensitivity of the LF signal is high. The description of the common part between FIG. 8 and FIG. 7 is omitted here. Here, in the driving support system 10, the LF signal transmitted from the vehicle 20 to the electronic key 50 can be said to be a signal for executing a driving support to move the vehicle 20 forward or backward according to the operation of the user terminal 70.

[0091] In FIG. 8, based on the operation of the unlock button 68 by the user U, the reception sensitivity is changed to high sensitivity, and the range R2 in which the LF signal transmitted from the vehicle 20A can be received is wider than the range R1 shown in FIG. 7. In FIG. 8, based on the operation of the unlock button 68 by the user U, all the doors of the vehicle 20A are in the unlocked state.

[0092] In FIG. 8, since the user U exists within the range R2, the electronic key 50 held by the user U receives the LF signal transmitted from the vehicle 20A without the user U approaching the vehicle 20A any further. Then, the electronic key 50 transmits an RF signal including the key ID information 64B to the vehicle 20A. The vehicle 20A that has received the RF signal collates the key ID information 64B with the vehicle ID information stored in the storage unit 24, and determines that the authentication of the electronic key 50 has been successful when the collation between the key ID information 64B and the vehicle ID information is successful. As a result, remote departure can be executed as a driving support.

[0093] After successfully authenticating the electronic key 50, the user U operates a predetermined application on the user terminal 70 to send an operation signal for remote vehicle exit from the user terminal 70 to the vehicle 20A. In the vehicle 20A that has received the operation signal, the drive ECU 30B, the steering ECU 30C, the brake ECU 30D, and the shift ECU 30E control the actuators 33 to 36 based on the operation signal to move the vehicle 20A forward in the direction of arrow A to a predetermined position. Note that the in-vehicle device 15 of the vehicle 20A controls the door lock device to lock all the doors based on the fact that the vehicle 20A has advanced in response to the operation of the user terminal 70.

[0094] After the vehicle 20A stops at the predetermined position, the user U operates the unlock button 68 to unlock the doors of the vehicle 20A. Through the above steps, the remote vehicle exit is completed.

[0095] Note that when performing remote vehicle exit, the doors of the vehicle 20 may be unlocked without receiving the operation of the unlock button 68 by the user after the vehicle 20 stops at the predetermined position. In this case, when the in-vehicle device 15 unlocks all the doors of the vehicle 20 based on the operation of the unlock button 68 and then remote vehicle exit is executed, the in-vehicle device 15 controls the door lock device to unlock all the doors based on the fact that the vehicle 20 has stopped at the predetermined position. Further, in remote vehicle exit, when unlocking the doors of the vehicle 20 without receiving the operation of the unlock button 68 by the user, information indicating that the doors have been unlocked may be notified by at least one of the vehicle 20, the electronic key 50, and the user terminal 70.

[0096] Also, in remote vehicle exit, when an RF signal including a locking request or an RF signal including an unlocking request is received from the electronic key 50 while the vehicle 20 is moving forward, the brake ECU 30D controls the actuator 35 to stop the vehicle 20.

[0097] Here, in the driving support system 10, remote unlocking can be executed not only when the reception sensitivity of the LF signal of the electronic key 50 is high, but also when it is standard sensitivity. However, when the reception sensitivity is standard sensitivity, as shown in FIG. 7, after approaching up to a range R1 which is a range where the LF signal can be received, it is necessary to move away from the vehicle 20 to clear the path, which is inconvenient for the user. Therefore, when executing remote unlocking, it is desirable to change the reception sensitivity of the LF signal of the electronic key 50 to high sensitivity.

[0098] As described above, the electronic key 50 includes an unlock button 68 that can be operated to unlock the door of the vehicle 20. And when the unlock button 68 is operated when the reception sensitivity of the LF signal transmitted wirelessly from the vehicle 20 is standard sensitivity, the CPU 61 of the electronic key 50 changes it to high sensitivity with a higher reception sensitivity than the standard sensitivity. Thereby, in the electronic key 50, since the reception sensitivity is changed to high sensitivity in a state where the user of the vehicle 20 recognizes that the door has been unlocked, when performing driving support on the condition that the electronic key 50 has been detected, the convenience of the user can be ensured without impairing the security of the vehicle 20.

[0099] Also, in the electronic key 50, when a predetermined time has elapsed after the CPU 61 changes the reception sensitivity to high sensitivity, the CPU 61 changes the reception sensitivity to standard sensitivity. Thereby, in the electronic key 50, even if the user of the vehicle 20 forgets that the reception sensitivity has been changed to high sensitivity, the reception sensitivity is automatically changed to standard sensitivity after the predetermined time has elapsed, so that the security risk to the vehicle 20 can be reduced.

[0100] Further, the electronic key 50 includes a lock button 67 that can be operated to lock the door of the vehicle 20. And when the lock button 67 is operated when the reception sensitivity is high sensitivity, the CPU 61 of the electronic key 50 changes the reception sensitivity to standard sensitivity. Thereby, in the electronic key 50, since the reception sensitivity can be changed to standard sensitivity according to the operation of the electronic key 50, the security risk to the vehicle 20 can be reduced by changing the reception sensitivity to standard sensitivity when the user moves away from the vehicle 20.

[0101] The driving support system 10 includes the above-described electronic key 50, a vehicle 20 capable of wireless communication with the electronic key 50, and a user terminal 70 capable of communicating with the vehicle 20. In the driving support system 10, when the vehicle 20 has confirmed that the transmitted LF signal has been received by the electronic key 50 and has successfully authenticated the electronic key 50, the vehicle 20 executes driving support for moving forward or backward in response to an operation of the user terminal 70. Thereby, in the driving support system 10, when executing driving support for moving the vehicle 20 forward or backward in response to an operation of the user terminal 70 on the condition that the electronic key 50 has been detected in a situation where the user of the vehicle 20 is outside the vehicle, it is possible to ensure the convenience of the user without impairing the security of the vehicle 20.

[0102] In addition, the above-described electronic key 50 can both lock the door of the vehicle 20 and change the reception sensitivity of the LF signal to the standard sensitivity by operating the lock button 67, and can both unlock the door of the vehicle 20 and change the reception sensitivity of the LF signal to the high sensitivity by operating the unlock button 68. Thus, since the electronic key 50 does not have a dedicated button for enabling an operation for changing the reception sensitivity of the LF signal, the reception sensitivity of the LF signal can be changed with a simple configuration using the existing buttons.

[0103] (Others) In the above-described embodiment, the lock button 67 and the unlock button 68 are provided as buttons of the electronic key 50, but other buttons may be provided in addition to these. For example, an opening / closing button for opening and closing the back door of the vehicle 20 may be provided as a button of the electronic key 50.

[0104] In the above embodiment, an example of the portable device is the electronic key 50. However, the present invention is not limited to this, and an example of the portable device may be a portable terminal such as a smartphone or a tablet terminal. For example, when an example of the portable device is a portable terminal, in the driving support system 10, the user terminal 70 may be used as an example of the portable device, or a portable terminal different from the user terminal 70 may be used as an example of the portable device. Further, when an example of the portable device is a portable terminal, an icon displayed on the screen of the portable terminal serves as an example of the locking unit and the unlocking unit.

[0105] In the above embodiment, when the reception sensitivity of the LF signal of the electronic key 50 is changed, change information indicating that the reception sensitivity has been changed may be notified by at least one of the vehicle 20, the electronic key 50, and the user terminal 70. Further, different change information may be notified depending on whether the reception sensitivity is changed to a high sensitivity or a standard sensitivity. For example, assuming that a predetermined sound is output from the electronic key 50 when the reception sensitivity is changed, a high sound may be output when the reception sensitivity is changed to a high sensitivity, and a low sound may be output when the reception sensitivity is changed to a standard sensitivity.

[0106] Note that the setting process in which the CPU 61 reads and executes software (program) in the above embodiment may be executed by various processors other than the CPU. Examples of the processor in this case include a PLD (Programmable Logic Device) whose circuit configuration can be changed after manufacture, such as an FPGA (Field-Programmable Gate Array), and a dedicated electric circuit which is a processor having a circuit configuration dedicated to executing a specific process, such as an ASIC (Application Specific Integrated Circuit). Further, the setting process may be executed by one of these various processors, or may be executed by a combination of two or more processors of the same type or different types (for example, a plurality of FPGAs, a combination of a CPU and an FPGA, etc.). Further, the hardware structure of these various processors is more specifically an electric circuit combining circuit elements such as semiconductor elements.

[0107] Also, in the above-described embodiment, the mode in which the control program 64A is pre-stored (installed) in the storage unit 64 has been described, but the present invention is not limited thereto. The control program 64A may be provided in a form recorded on a recording medium such as a CD-ROM (Compact Disk Read Only Memory), a DVD-ROM (Digital Versatile Disk Read Only Memory), or a USB (Universal Serial Bus) memory. Further, the control program 64A may be in a form downloaded from an external device via a network.

Explanation of Reference Numerals

[0108] 10 Driving support system 20 Vehicle 50 Electronic key (an example of a portable device) 61A Modifying unit 64A Control program 67 Locking button (an example of a locking unit) 68 Unlocking button (an example of an unlocking unit) 70 User terminal

Claims

1. An unlocking unit capable of performing an operation to unlock a vehicle door; A changing unit that changes the reception sensitivity to a second sensitivity higher than the first sensitivity when the unlocking unit is operated when the reception sensitivity of a predetermined signal transmitted wirelessly from the vehicle is the first sensitivity; Comprising; The changing unit, When a predetermined time has elapsed after changing the reception sensitivity to the second sensitivity, changes the reception sensitivity to the first sensitivity, Portable device.

2. Comprising a locking unit capable of performing an operation to lock a vehicle door, The changing unit, When the locking unit is operated when the reception sensitivity is the second sensitivity, changes the reception sensitivity to the first sensitivity, The portable device according to claim 1.

3. The portable device according to claim 1 or 2, A vehicle capable of wireless communication with the portable device, A user terminal capable of communicating with the vehicle, Comprising; The vehicle, When it is confirmed that the portable device has received the transmitted predetermined signal, executes driving support to move the vehicle forward or backward according to the operation of the user terminal, Driving support system.

4. Receives an operation to unlock a vehicle door, When the operation is performed when the reception sensitivity of a predetermined signal transmitted wirelessly from the vehicle is the first sensitivity, changes it to a second sensitivity higher than the first sensitivity, When a predetermined time has elapsed after changing the reception sensitivity to the second sensitivity, changes the reception sensitivity to the first sensitivity, A control method in which a computer executes the process.

5. On a computer, Receives an operation to unlock a vehicle door, When the operation is performed when the reception sensitivity of a predetermined signal transmitted wirelessly from the vehicle is the first sensitivity, changes it to a second sensitivity higher than the first sensitivity, When a predetermined time has elapsed after changing the reception sensitivity to the second sensitivity, changes the reception sensitivity to the first sensitivity, A control program for causing the process to be executed.

Images