JP2013226865A - Vehicle periphery monitoring system, on-vehicle device, and mobile terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle periphery monitoring system capable of monitoring an object moved close to the periphery of a vehicle utilizing a keyless system for the vehicle, and also provide an on-vehicle device and a mobile terminal used for the monitoring system.SOLUTION: A smart keyless control unit 2 includes a vehicle information acquiring part 23 for acquiring vehicle information indicating a state of a vehicle 100, a control part 20 which determines whether or not the vehicle 100 is in such a state that the periphery thereof must be monitored based on the vehicle information acquired by the vehicle information acquiring part 23, makes LF transmission parts 24a-24d perform trial communication when the vehicle 100 is in that state, and detects an object having an unregistered mobile terminal 4 present in a communication area based on whether the mobile terminal 4 communicating with the LF transmission parts 24a-24d is unregistered or not, and an HMI part 25 which presents the information on the object detected by the control part 20 to an occupant of the vehicle 100.

Description

  The present invention relates to a vehicle periphery monitoring system that monitors an object approaching the periphery of a vehicle by using a vehicle keyless device that locks and unlocks a vehicle door without a key operation, and an on-vehicle device and a portable terminal used therefor.

  Conventionally, in order to prevent an accident caused by an object approaching a traveling vehicle, an apparatus for detecting an object around the vehicle and notifying a driver is known. For example, in the apparatus described in Patent Document 1, an object appearing behind the lane change side is monitored using a distance sensor using ultrasonic waves or radio waves as a probe, and another vehicle is detected when the lane change is made. And warn the driver.

Further, in recent years, a keyless system for a vehicle in which a user carrying a specific portable terminal presses a button on a vehicle door knob or the like to lock or unlock a vehicle door without a key operation has become widespread. Yes. For example, the keyless system described in Patent Document 2 uses radio waves in the LF (Low Frequency) band of about 120 kHz to 135 kHz in order for the vehicle-mounted device to communicate with the mobile terminal.
In the keyless system, it is only necessary to communicate with a portable terminal carried by a user approaching the periphery of the vehicle. Therefore, the communication unit included in the vehicle-mounted device uses the vehicle periphery as a communication area.

Japanese Patent Laid-Open No. 54-118036 JP 2003-221954 A

  In the conventional technique represented by Patent Document 1, even a vehicle equipped with a vehicle keyless device as disclosed in Patent Document 2 requires a distance sensor to monitor an object around the vehicle. However, there has been a problem that the configuration of the system mounted on the vehicle becomes complicated and leads to an increase in cost.

In recent years, keyless systems for vehicles have begun to be installed not only in automobiles but also in various vehicles such as motorcycles, and are becoming standard in-vehicle systems installed in vehicles.
In addition, the use of portable terminals for identifying users as well as devices such as smartphones and mobile phones has been considered.

  The present invention has been made to solve the above-described problems, and is a vehicle periphery monitoring system capable of monitoring an object approaching the periphery of the vehicle using a vehicle keyless system, and an in-vehicle device used therefor And to obtain a portable terminal.

  The vehicle periphery monitoring system according to the present invention is based on a result of authenticating a portable terminal through communication by the communication unit, having a communication area as a communication area, a communication unit that communicates with a portable terminal existing in the communication area. A vehicle periphery monitoring system using a keyless system including an on-vehicle device that controls locking or unlocking of a vehicle door, wherein the on-vehicle device acquires vehicle information indicating a vehicle state, and a vehicle Based on the vehicle information acquired by the information acquisition unit, it is determined whether or not the vehicle state is to monitor the periphery of the vehicle, and if the vehicle is in the vehicle state, the communication unit tries communication, Based on whether or not the communicated mobile terminal is unregistered, a control unit for detecting an object having an unregistered mobile terminal present in the communication area, and information on the object detected by the control unit To the crew And an information presentation unit to be.

  According to the present invention, there is an effect that an object approaching the periphery of the vehicle can be monitored using the keyless system for the vehicle.

It is a figure which shows the outline | summary of the vehicle periphery monitoring system which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the smart keyless control unit of this invention. It is a block diagram which shows the structure of the portable terminal of this invention. 4 is a flowchart showing the operation of the smart keyless control unit according to the first embodiment. 3 is a flowchart showing the operation of the mobile terminal according to Embodiment 1. 4 is a flowchart showing the operation of the smart keyless control unit according to the first embodiment. 4 is a flowchart showing the operation of the smart keyless control unit according to the first embodiment. It is a figure which shows the outline | summary of the vehicle periphery monitoring system which concerns on Embodiment 2 of this invention. 6 is a flowchart showing the operation of the smart keyless control unit according to the second embodiment.

Embodiment 1 FIG.
1 is a diagram showing an outline of a vehicle periphery monitoring system according to Embodiment 1 of the present invention. In FIG. 1, a vehicle periphery monitoring system 1 is a system that monitors an object around the vehicle 100 using a vehicle keyless device (hereinafter referred to as a keyless system) mounted on the vehicle 100. As a system configuration, a smart keyless control unit 2, an LF antenna 3a on the rear left side of the vehicle 100, an LF antenna 3b on the left side of the front, an LF antenna 3c on the right side of the rear, and the front, which are onboard devices shared with the keyless system. The LF antenna 3d on the right side of the unit is provided, and an object having the portable terminal 4 is a monitoring target.
For example, when the motorcycle 200 enters the communication area A of the LF antenna 3a, the portable terminal 4 carried by a passenger of the motorcycle 200 is detected. Since the mobile terminal 4 is detected in the communication area A of the LF antenna 3a, the smart keyless control unit 2 determines that the motorcycle 200 has approached the rear left side of the vehicle 100 and notifies the passenger of the vehicle 100.

The vehicle periphery monitoring system 1 functions as a normal smart keyless system when the mobile terminal 4 carried by the driver of the vehicle 100 is detected.
That is, when the mobile terminal 4 carried by the occupant of the vehicle 100 enters the communication area of any of the LF antennas 3a to 3d, the smart keyless control unit 2 collates the mobile terminal 4 to check the occupant ( If the portable terminal 4 is registered in advance as a portable terminal possessed by the driver, the door 100 of the vehicle 100 is locked or unlocked without a key operation.

  FIG. 2 is a block diagram showing the configuration of the smart keyless control unit of the present invention, and shows the internal configuration of the smart keyless control unit 2 of FIG. The smart keyless control unit 2 is a vehicle-mounted device mounted on the vehicle 100, and includes a control unit 20, an RF (Radio Frequency) antenna 21, an RF reception unit 22, a vehicle information acquisition unit 23, LF transmission units 24a to 24d, and an HMI. (Human Machine Interface) section 25 is provided.

The control unit 20 is a control unit that performs normal keyless control and controls the HMI unit 25 to notify the approach of an object to the vehicle 100 according to the state of the vehicle 100.
For example, when the control unit 20 determines that the vehicle state in which the periphery of the vehicle 100 should be monitored based on the vehicle information acquired by the vehicle information acquisition unit 23, the control unit 20 is detected by one of the LF antennas 3a to 3d. If the mobile terminal 4 is not a pre-registered mobile terminal, the HMI unit 25 is controlled to notify that an object having the mobile terminal 4 is present in the direction of the LF antenna.

  The vehicle state in which the periphery of the vehicle 100 should be monitored is a state in which there is a possibility of contact with objects around the vehicle 100. For example, the vehicle 100 tries to change the traveling direction such as turning right or left or changing lanes. A state where the vehicle 100 is stopped and a passenger is about to get off. Therefore, it is possible to prevent the vehicle 100 from coming into contact with an object by performing vehicle periphery monitoring in response to this vehicle state.

The RF antenna 21 is an antenna that receives RF band radio waves used for radio waves transmitted from the portable terminal 4 to the vehicle-mounted device in a general keyless system.
The RF receiver 22 receives the response signal transmitted from the mobile terminal 4 via the RF antenna 21, converts the response signal into a signal format that can be processed by the controller 20, and outputs the signal format to the controller 20.
The vehicle information acquisition unit 23 acquires vehicle information of the vehicle 100 from a target device (not shown in FIG. 1) mounted on the vehicle 100 via a CAN (Car Area Network) or the like. Note that the vehicle information is information used to determine whether or not the vehicle state is to be monitored around the vehicle. Examples of the vehicle information include blinker lighting information and sensor information indicating that the driver has touched the door knob. .

The LF antennas 3 a to 3 d are antennas that receive LF band radio waves used for radio waves transmitted from the vehicle-mounted device to the mobile terminal 4 in a general keyless system.
The LF transmitters 24a to 24d are transmitters that convert an activation signal for activating the portable terminal 4 output from the controller 20 into a radio wave signal and output the radio signal from the LF antennas 3a to 3d.
The HMI unit 25 is an information presentation unit that notifies an occupant of the vehicle 100 of an object approaching the periphery of the vehicle 100 using at least one of audio and video.

  FIG. 3 is a block diagram showing the configuration of the mobile terminal of the present invention, and shows the internal configuration of the mobile terminal 4 of FIG. The mobile terminal 4 is a mobile terminal registered in a smart keyless control unit (not shown in FIG. 1) of a keyless system mounted on the motorcycle 200, and includes a control unit 40, an LF antenna 41, an LF reception unit 42, and an RF antenna. 43 and an RF transmitter 44.

The control unit 40 is a control unit that is activated by an activation signal acquired by LF band communication used in a general keyless system and transmits a response signal by the RF transmission unit 44 and the RF antenna 43.
The LF antenna 41 is an antenna that receives radio waves in the LF band used for radio waves transmitted from the vehicle-mounted device toward the mobile terminal 4 in a general keyless system.
The LF receiver 42 converts the activation signal received by the LF antenna 41 into a signal format that can be processed by the controller 40, and then outputs the signal to the controller 40.

The RF antenna 43 is an antenna that receives RF band radio waves used for radio waves transmitted from the mobile terminal 4 to the vehicle-mounted device in a general keyless system.
The RF transmission unit 44 receives a response signal indicating that the activation signal transmitted from the smart keyless control unit 2 has been received by the portable terminal 4 from the control unit 40, converts the response signal into a radio wave signal, and converts the response signal to the RF antenna 43. It is the transmission part which outputs from.

Next, the operation will be described.
FIG. 4 is a flowchart showing the operation of the smart keyless control unit according to the first embodiment, and shows a case where surrounding objects are monitored when the lane of the vehicle 100 is changed.
The vehicle information acquisition unit 23 of the smart keyless control unit 2 acquires a blinker operation signal indicating presence / absence of blinker lighting, and outputs it to the control unit 20 as vehicle information.
The control unit 20 determines whether or not the winker is on (lighted) based on the vehicle information input from the vehicle information acquisition unit 23 (step ST1). Here, if the winker is off (lights off) (step ST1; NO), the control unit 20 determines that the vehicle state is not to be monitored around the vehicle and ends the process.

On the other hand, if the winker is on (step ST1; YES), the control unit 20 determines that the vehicle state is to be monitored around the vehicle, and sends an activation signal for activating the portable terminal 4 to the LF transmission units 24a to 24a. The data is output to 24d and transmitted from all the LF antennas 3a to 3d all at once (step ST2). That is, the LF communication units 24a to 24d are caused to try communication.
Thereafter, the control unit 20 determines whether or not the RF reception unit 22 has received a response signal via the RF antenna 21 (step ST3). Here, when the RF receiver 22 does not receive a response signal (step ST3; NO), the controller 20 returns to step ST1 and repeats the above-described processing.

When the RF reception unit 22 receives the response signal (step ST3; YES), the control unit 20 determines whether the response signal is from the mobile terminal 4 registered in advance (step ST4). Here, based on the authentication code included in the response signal, it is determined whether or not the response signal is from the mobile terminal 4 registered in advance.
When it is a response signal from the mobile terminal 4 registered in advance (step ST4; YES), the control unit 20 returns to step ST1 and confirms whether or not the blinker is turned on again, and repeats the above-described processing.

  When it is determined that the response signal is not a pre-registered mobile terminal 4 (step ST4; NO), the control unit 20 determines that the object (another vehicle) on which the mobile terminal 4 is mounted is the vehicle 100 (own vehicle). It is determined that the user is in the vicinity (step ST5). Thereafter, the control unit 20 controls the HMI unit 25 to notify the driver of the host vehicle of notification information indicating that the other vehicle is in the vicinity of the host vehicle (step ST6).

FIG. 5 is a flowchart showing the operation of the mobile terminal according to Embodiment 1, and shows the operation of the mobile terminal 4 corresponding to the process of FIG.
When receiving the LF signal via the LF antenna 41 (step ST1a), the LF receiver 42 of the mobile terminal 4 converts the received LF signal into a signal format that can be processed by the controller 40, and then outputs the signal to the controller 40. To do.
The controller 40 determines whether or not the LF signal input from the LF receiver 42 is an activation signal from the smart keyless control unit 2 that has registered the mobile terminal 4 (own terminal) (step ST2a). For example, based on the authentication code included in the activation signal, it is determined whether the activation signal is from the smart keyless control unit 2 that registered the terminal 4 itself.

  When the activation signal is from the smart keyless control unit 2 that has registered its own terminal 4 (step ST2a; YES), the control unit 40 generates a response signal for the smart keyless control unit 2 that has registered its own terminal 4 (step ST3a). ). For example, a response signal including the authentication code of the terminal 4 is generated.

  If the activation signal is from the unregistered smart keyless control unit 2 (step ST2a; NO), the control unit 40 generates a response signal for the unregistered smart keyless control unit 2 (step ST4a). For example, considering that authentication is performed on the smart keyless control unit 2 side, a response signal including the authentication code of the terminal 4 may be generated as in step ST3a, or a response signal not including the authentication code is generated. May be.

  Thereafter, the RF transmission unit 44 converts the response signal input from the control unit 40 into a radio wave signal, and transmits the radio signal to the smart keyless control unit 2 that is the activation signal transmission source via the RF antenna 43 (step ST5a). This response signal is received in step ST3 of FIG.

In a normal keyless system, the smart keyless control unit 2 transmits an activation signal to the mobile terminal 4 when the user holding the mobile terminal 4 presses the button of the doorknob.
The present invention uses the keyless system described above to transmit an activation signal when the blinker is turned on or off. Therefore, other vehicles existing around the host vehicle can be detected without adding new hardware.

In the example shown in FIG. 4, since the activation signals are transmitted simultaneously from the LF antennas 3 a to 3 d, all communication areas of the LF antennas 3 a to 3 d serve as object monitoring areas, and objects ( Vehicle) can be detected reliably.
However, it cannot be determined from which direction the other vehicle is approaching.
Therefore, it is possible to determine from which direction the other vehicle is approaching by transmitting an activation signal from the left and right winkers at the LF transmitter on the side of the winker that is lit.
In addition, since the LF transmission unit other than the direction to be monitored is not allowed to attempt communication, power consumption can be reduced.

FIG. 6 is a flowchart showing the operation of the smart keyless control unit according to the first embodiment, and shows the operation of transmitting an activation signal by the LF transmitter on the blinker side that is lit.
The vehicle information acquisition unit 23 acquires a blinker operation signal indicating whether or not the blinker is turned on, and outputs it to the control unit 20 as vehicle information.
Based on the vehicle information input from the vehicle information acquisition unit 23, the control unit 20 determines whether or not the left winker (hereinafter referred to as the left winker) is on (lighted) (step ST1b). Here, if the left winker is off (extinguished) (step ST1b; NO), the control unit 20 determines whether or not the right winker (hereinafter referred to as right winker) is on (lit). (Step ST2b).
If the left winker is on (step ST1b; YES), the control unit 20 determines that it is a vehicle state in which an object approaching from the left side of the vehicle 100 should be monitored because the vehicle 100 turns to the left, and the portable terminal 4 is output to the LF transmitters 24a and 24b and transmitted from the LF antennas 3a and 3b mounted on the left side of the vehicle 100 (step ST3b).

On the other hand, if the right winker is on (step ST2b; YES), the control unit 20 determines that it is a vehicle state in which an object approaching from the right side of the vehicle 100 should be monitored because the vehicle 100 turns to the right. 4 is output to the LF transmitters 24c and 24d and transmitted from the LF antennas 3c and 3d mounted on the right side of the vehicle 100 (step ST4b).
If the left and right winkers are off (turned off) (step ST2b; NO), the control unit 20 determines that the vehicle 100 is not in a vehicle state in which the vehicle periphery should be monitored, and ends the process.

Thereafter, the control unit 20 determines whether or not the RF reception unit 22 has received a response signal via the RF antenna 21 (step ST5b).
When the RF receiving unit 22 does not receive a response signal (step ST5b; NO), the control unit 20 returns to step ST1b and repeats the above processing.

  When the RF reception unit 22 receives the response signal (step ST5b; YES), the control unit 20 determines whether the response signal is from the mobile terminal 4 registered in advance (step ST6b). When the response signal is from the mobile terminal 4 registered in advance (step ST6b; YES), the control unit 20 returns to step ST1b, confirms whether or not the blinker is lit again, and repeats the above-described processing.

When it is determined that the response signal is not a pre-registered portable terminal 4 (step ST6b; NO), the control unit 20 determines that the object (another vehicle) on which the portable terminal 4 is mounted is the vehicle 100 (own vehicle). It is determined that the user is in the vicinity (step ST7b).
Thereafter, the control unit 20 controls the HMI unit 25 to notify the driver of the host vehicle of notification information indicating that the other vehicle is on the left side or the right side of the host vehicle (step ST8b).

In FIG. 6, since the LF transmission unit that attempts communication according to the vehicle state is determined, it is not possible to detect other vehicles approaching from outside the communication area of the determined communication unit.
Therefore, by sequentially transmitting the activation signal for each of the front, rear, left, and right LF transmitters, the vicinity of the vehicle 100 can be monitored in the forward direction while enabling determination of the direction in which the other vehicle approaches.

FIG. 7 is a flowchart showing the operation of the smart keyless control unit according to the first embodiment, and shows the operation of sequentially transmitting the activation signal for each of the front, rear, left and right LF transmission units.
The vehicle information acquisition unit 23 acquires a blinker operation signal indicating whether or not the blinker is turned on, and outputs it to the control unit 20 as vehicle information.
The control unit 20 determines whether or not the winker is turned on (lighted) based on the vehicle information input from the vehicle information acquisition unit 23 (step ST1c).
If the blinker is off (turned off) (step ST1c; NO), the control unit 20 determines that the vehicle 100 is not in a vehicle state in which the vehicle periphery should be monitored, and ends the process.

On the other hand, if the winker is on (step ST1c; YES), the control unit 20 first outputs an activation signal of the portable terminal 4 to the LF transmission unit 24a in order to monitor an object approaching from the rear left side of the vehicle 100. Then, transmission is performed from the LF antenna 3a mounted on the rear left side of the vehicle 100 (step ST2c).
The controller 20 determines whether or not the RF receiver 22 has received a response signal via the RF antenna 21 (step ST3c).
When the RF reception unit 22 does not receive a response signal (step ST3c; NO), the control unit 20 proceeds to the process of step ST5c.

When the RF reception unit 22 receives the response signal (step ST3c; YES), the control unit 20 determines whether the response signal is from the mobile terminal 4 registered in advance (step ST4c).
When the response signal is from the mobile terminal 4 registered in advance (step ST4c; YES), the control unit 20 subsequently monitors the object approaching from the front left side of the vehicle 100. Is transmitted to the LF transmitter 24b and transmitted from the LF antenna 3b mounted on the left side of the front of the vehicle 100 (step ST5c).

  The controller 20 determines whether or not the RF receiver 22 has received a response signal via the RF antenna 21 (step ST6c). When the RF receiving unit 22 does not receive the response signal (step ST6c; NO), the control unit 20 proceeds to the process of step ST8c.

When the RF reception unit 22 receives the response signal (step ST6c; YES), the control unit 20 determines whether the response signal is from the mobile terminal 4 registered in advance (step ST7c).
When it is a response signal from the mobile terminal 4 registered in advance (step ST7c; YES), the control unit 20 next outputs an activation signal of the mobile terminal 4 in order to monitor an object approaching from the rear right side of the vehicle 100. It outputs to the LF transmission part 24c, and transmits from the LF antenna 3c mounted in the rear right side of the vehicle 100 (step ST8c).

  The control unit 20 determines whether or not the RF reception unit 22 has received a response signal via the RF antenna 21 (step ST9c). Here, when the RF receiving unit 22 does not receive the response signal (step ST9c; NO), the control unit 20 proceeds to the process of step ST11c.

When the RF reception unit 22 receives the response signal (step ST9c; YES), the control unit 20 determines whether or not the response signal is from the mobile terminal 4 registered in advance (step ST10c).
When it is a response signal from the mobile terminal 4 registered in advance (step ST10c; YES), the control unit 20 next monitors the object approaching from the front right side of the vehicle 100. Is transmitted to the LF transmitter 24d and transmitted from the LF antenna 3d mounted on the right side of the front of the vehicle 100 (step ST11c).

  The control unit 20 determines whether or not the RF reception unit 22 has received a response signal via the RF antenna 21 (step ST12c). When the RF receiving unit 22 does not receive a response signal (step ST12c; NO), the control unit 20 determines that the vehicle 100 is not in a vehicle state in which the vehicle periphery should be monitored and ends the process.

  When the RF reception unit 22 receives the response signal (step ST12c; YES), the control unit 20 determines whether the response signal is from the mobile terminal 4 registered in advance (step ST13c). When the response signal is from the mobile terminal 4 registered in advance (step ST13c; YES), the control unit 20 ends the monitoring process around the vehicle 100 and shifts to a keyless entry operation.

When it is determined that the response signal is not a pre-registered mobile terminal 4 (step ST4c, step ST7c, step ST10c, step ST13c; NO), the control unit 20 determines that the object (another vehicle) on which the mobile terminal 4 is mounted. It is determined that the vehicle 100 (own vehicle) is in the vicinity (step ST14c). Here, it is determined that an object (another vehicle) is approaching from at least one of the rear left side, the front left side, the rear right side, and the front right side of the host vehicle.
The control unit 20 controls the HMI unit 25 so that an object (another vehicle) approaches from at least one of the rear left side, the front left side, the rear right side, and the front right side of the host vehicle. Notification information indicating this is notified to the driver of the host vehicle (step ST15c).

In the above example, the case where the activation signal is transmitted when the blinker is turned on or not is shown. However, the vehicle information acquisition unit 23 acquires a detection signal indicating whether the occupant has touched the doorknob, An activation signal may be transmitted when the doorknob is touched.
In this case, the vehicle is assumed to be used for monitoring other vehicles approaching the periphery of the own vehicle when the own vehicle stops on the shoulder of the road and an occupant tries to open the door.

  In the example of FIG. 1, the motorcycle 200 is detected as the other vehicle, but a bicycle or a pedestrian carrying the portable terminal 4 constituting the keyless system may be detected. In this case, the mobile terminal 4 may be a mobile phone or a smartphone having the function of the mobile terminal that constitutes the keyless system.

As described above, according to the first embodiment, the smart keyless control unit 2 includes the vehicle information acquisition unit 23 that acquires vehicle information indicating the state of the vehicle 100, and the vehicle information acquired by the vehicle information acquisition unit 23. Based on this, it is determined whether or not the vehicle 100 is in a vehicle state to be monitored, and if the vehicle 100 is in the vehicle state, the LF transmission units 24a to 24d try communication and the LF transmission units 24a to 24d. The control unit 20 detects an object having the unregistered mobile terminal 4 existing in the communication area based on whether or not the mobile terminal 4 communicated with the unregistered mobile device 4 and the object detected by the control unit 20 And an HMI unit 25 for presenting information to a passenger of the vehicle 100.
With this configuration, an object approaching the periphery of the vehicle can be monitored using a vehicle keyless system without adding new hardware.

  In addition, according to the first embodiment, the smart keyless control unit 2 includes the LF transmission units 24a to 24d, which are a plurality of communication units each having a communication area around the vehicle 100, and the vehicle information acquisition unit 23 includes Based on the acquired vehicle information, an LF transmission unit that attempts communication is determined from among a plurality of LF transmission units, so it is possible to determine from which direction the other vehicle is approaching. In addition, since the LF transmitting unit other than the direction to be monitored is not allowed to attempt communication, power consumption can be reduced.

  Furthermore, according to the first embodiment, the smart keyless control unit 2 includes a plurality of LF transmitting units, each including a plurality of LF transmitting units 24a to 24d, each having a communication area around the vehicle 100. Since each communication is tried sequentially, it is possible to monitor the periphery of the vehicle 100 in the forward direction while enabling determination of the direction in which another vehicle approaches.

Embodiment 2. FIG.
FIG. 8 is a diagram showing an outline of a vehicle periphery monitoring system according to Embodiment 2 of the present invention. A vehicle periphery monitoring system 1A shown in FIG. 8 is a system that monitors objects around the vehicle 100 using a keyless system mounted on the vehicle 100A having a rear camera. As a system configuration, a smart keyless control unit 2A, a left side LF antenna 3a, a front left side LF antenna 3b, a rear right side LF antenna 3c, which is an in-vehicle device shared with a keyless system, front side The LF antenna 3d on the right side of the unit and the image processing unit 5 are provided, and an object having the portable terminal 4 is a monitoring target.

The smart keyless control unit 2A includes an image processing unit 5 in place of the vehicle information acquisition unit 23 shown in FIG. 2, and when a moving body detection signal is received from the image processing unit 5, the smart keyless control unit 2A is used as a trigger. An activation signal for activating the terminal 4 is transmitted.
The image processing unit 5 is an image capturing unit included in the vehicle 100A, and analyzes an image captured by the rear camera to detect a moving body (for example, the motorcycle 200) approaching from the rear of the vehicle 100A. It is.

  As shown in FIG. 8A, when the motorcycle 200 approaching from the rear of the vehicle 100A enters the imaging field B of the rear camera, the motorcycle 200 takes an image and the captured image of the motorcycle 200 is transferred to the image processing unit 5. Is output. When the image processing unit 5 analyzes the captured image captured by the rear camera and detects the motorcycle 200, the image processing unit 5 detects the moving body detection signal detected by the motorcycle 200 approaching from the rear of the vehicle 100A as a smart keyless control unit 2A. Send to. When the smart keyless control unit 2A receives the moving body detection signal from the image processing unit 5, the smart keyless control unit 2A causes the activation signal of the portable terminal 4 to be transmitted simultaneously from the LF antennas 3a to 3d.

  Thereafter, as shown in FIG. 8B, when the motorcycle 200 moves to the rear left side of the vehicle 100A and enters the communication area A of the LF antenna 3a, the portable terminal 4 carried by a passenger of the motorcycle 200 is carried out. Is detected. The smart keyless control unit 2 </ b> A determines that the motorcycle 200 has approached the rear left side of the vehicle 100 because the mobile terminal 4 is detected in the communication area A of the LF antenna 3 a, and notifies the passenger of the vehicle 100.

Next, the operation will be described.
FIG. 9 is a flowchart showing the operation of the smart keyless control unit according to the second embodiment. The operation of the mobile terminal 4 is the same as that in FIG.
First, when receiving the moving body detection signal from the image processing unit 5 (step ST1d), the control unit 20 of the smart keyless control unit 2A outputs an activation signal for activating the portable terminal 4 to the LF transmission units 24a to 24d. Then, all the LF antennas 3a to 3d are simultaneously transmitted (step ST2d).

Next, the controller 20 determines whether or not the RF receiver 22 has received a response signal via the RF antenna 21 (step ST3d).
When the RF reception unit 22 receives the response signal (step ST3d; YES), the control unit 20 determines whether the response signal is from the mobile terminal 4 registered in advance (step ST4d). Here, when the response signal is from the unregistered mobile terminal 4 (step ST4d; NO), the control unit 20 determines that the motorcycle 200 on which the mobile terminal 4 is mounted is in the vicinity of the vehicle 100 (own vehicle). (Step ST5d).
Thereafter, control unit 20 controls HMI unit 25 to notify the driver of notification information indicating that motorcycle 200 is in the vicinity of the host vehicle (step ST6d).

On the other hand, when the RF receiving unit 22 does not receive a response signal (step ST3d; NO) or when it is a response signal from the mobile terminal 4 registered in advance (step ST4d; YES), the control unit 20 transmits an activation signal. Then, the number of trials for detecting the moving body is incremented by +1 (step ST7d).
Thereafter, the control unit 20 determines whether or not the number of trials is N (predetermined) or more (step ST8d). Here, when the number of trials is less than N (step ST8d; NO), the control unit 20 returns to the process of step ST2d, transmits the activation signal again, and repeats the above-described process.
When the number of trials is N or more (step ST8d; YES), the control unit 20 determines that the motorcycle 200 that is out of the detection range of the system 1A has moved away from the vicinity of the host vehicle, and ends the process.

In a normal keyless system, the smart keyless control unit transmits an activation signal to the portable terminal 4 when the user holding the portable terminal 4 presses the button of the door knob.
The present invention uses the keyless system described above to transmit an activation signal when another vehicle approaching from behind the vehicle 100A is detected. Therefore, other vehicles existing around the host vehicle can be detected without adding new hardware.

  9 shows the case where the activation signal is transmitted from all the LF antennas 3a to 3d at the same time in step ST2d. However, as in FIG. 7, the activation signal is sequentially transmitted for each of the front, rear, left and right LF transmission units. May be.

In the second embodiment, the configuration in which the image processing unit 5 is provided instead of the vehicle information acquisition unit 23 is shown. However, the image processing unit 5 is provided in addition to the configuration shown in the first embodiment. May be. In this case, in step ST2d of FIG. 9, the activation signal may be transmitted by the LF transmission unit on the side of the blinker that is lit as in FIG. Moreover, you may transmit a starting signal similarly to FIG.
Furthermore, not only when the activation signal is transmitted when the blinker is turned on, but also when the vehicle information acquisition unit 23 acquires a detection signal indicating whether or not the occupant has touched the door knob, and the occupant is touching the door knob. An activation signal may be transmitted in response to. In this case, the vehicle is assumed to be used for monitoring other vehicles approaching the periphery of the own vehicle when the own vehicle stops on the shoulder of the road and an occupant tries to open the door.

  In the example of FIG. 8, the case where the motorcycle 200 is detected as the other vehicle is shown, but a bicycle or a pedestrian carrying the portable terminal 4 constituting the keyless system may be detected. In this case, the mobile terminal 4 may be a mobile phone or a smartphone having the function of the mobile terminal that constitutes the keyless system.

  Moreover, although the case where the image processing unit 5 detects the moving body approaching from the rear of the vehicle 100A from the image photographed by the rear camera has been shown, the front of the host vehicle or A moving body approaching from the side may be detected.

  As described above, according to the second embodiment, the smart keyless control unit 2A performs image analysis on the captured image captured by the rear camera that captures the periphery of the vehicle 100A, and the object existing around the vehicle 100A. And when the object is detected by the image processing unit 5 around the vehicle 100A, the LF transmitters 24a to 24d are tried to communicate with each other, and the portable terminal 4 that has communicated with the LF transmitter is not registered. The control unit 20 that detects an object having the unregistered portable terminal 4 that exists in the communication area and the information on the object detected by the control unit 20 are presented to the vehicle occupant based on whether or not And an HMI unit 25. With this configuration, an object approaching the periphery of the vehicle 100 can be monitored using a vehicle keyless system without adding new hardware.

  Moreover, according to this Embodiment 2, in addition to the said structure, the vehicle information acquisition part 23 which acquires the vehicle information which shows the state of the vehicle 100A is provided, and the control part 20 acquired by the vehicle information acquisition part 23 Based on the vehicle information, it is determined whether or not it is a vehicle state in which the periphery of the vehicle 100A is to be monitored. When the vehicle 100A is in the vehicle state, the LF transmission unit is tried to communicate with the LF transmission unit. Based on whether or not the portable terminal 4 is unregistered, an object having the unregistered portable terminal 4 present in the communication area is detected. By doing in this way, the effect similar to the said Embodiment 1 can be acquired.

  In the present invention, within the scope of the invention, any combination of each embodiment, any component of each embodiment can be modified, or any component can be omitted in each embodiment. .

  1, 1A vehicle periphery monitoring system, 2, 2A smart keyless control unit, 3a-3d, 41 LF antenna, 4 portable terminal, 5 image processing unit, 20, 40 control unit, 21, 43 RF antenna, 22 RF reception unit, 23 vehicle information acquisition part, 24a-24d LF transmission part, 25 HMI part, 42 LF reception part, 44 RF transmission part, 100,100A vehicle, 200 motorcycle.

Claims (9)

Based on the result of authenticating the portable terminal through communication by the communication unit, the door of the vehicle is locked, or the vehicle has a communication area as a communication area and communicates with a portable terminal existing in the communication area. A vehicle periphery monitoring system using a keyless system equipped with a vehicle-mounted device for controlling unlocking,
The in-vehicle device is
A vehicle information acquisition unit for acquiring vehicle information indicating a state of the vehicle;
Based on the vehicle information acquired by the vehicle information acquisition unit, it is determined whether or not the vehicle state is to monitor the periphery of the vehicle, and if the vehicle is in the vehicle state, communication with the communication unit is attempted. And a control unit that detects an object having the unregistered mobile terminal that exists in the communication area, based on whether or not the mobile terminal that communicated with the communication unit is unregistered,
A vehicle periphery monitoring system comprising: an information presentation unit that presents information on the object detected by the control unit to an occupant of the vehicle. Based on the result of authenticating the portable terminal through communication by the communication unit, the door of the vehicle is locked, or the vehicle has a communication area as a communication area and communicates with a portable terminal existing in the communication area. A vehicle periphery monitoring system using a keyless system equipped with a vehicle-mounted device for controlling unlocking,
The in-vehicle device is
An image processing unit that detects an object existing in the vicinity of the vehicle by performing image analysis on a captured image captured by the imaging unit that captures the periphery of the vehicle;
When an object is detected in the vicinity of the vehicle by the image processing unit, the communication unit is made to try communication, and based on whether or not the portable terminal that has communicated with the communication unit is unregistered, the communication area A control unit for detecting an object having the unregistered mobile terminal present;
A vehicle periphery monitoring system comprising: an information presentation unit that presents information on the object detected by the control unit to an occupant of the vehicle. A vehicle information acquisition unit that acquires vehicle information indicating a state of the vehicle;
The control unit determines, based on the vehicle information acquired by the vehicle information acquisition unit, whether or not the vehicle state is to monitor the periphery of the vehicle, and if the vehicle is in the vehicle state, the communication A communication unit, and an object having the unregistered mobile terminal present in the communication area is detected based on whether or not the mobile terminal that has communicated with the communication unit is unregistered. The vehicle periphery monitoring system according to claim 2. Based on the result of authenticating the portable terminal through communication by the communication unit, the vehicle door is locked or unlocked based on a communication area around the vehicle and having a communication unit communicating with the portable terminal existing in the communication area. An in-vehicle device of a keyless system that controls a lock,
A vehicle information acquisition unit for acquiring vehicle information indicating a state of the vehicle;
Based on the vehicle information acquired by the vehicle information acquisition unit, it is determined whether or not the vehicle state is to monitor the periphery of the vehicle, and if the vehicle is in the vehicle state, communication with the communication unit is attempted. And a control unit that detects an object having the unregistered mobile terminal that exists in the communication area, based on whether or not the mobile terminal that communicated with the communication unit is unregistered,
An on-vehicle device comprising: an information presentation unit that presents information on the object detected by the control unit to an occupant of the vehicle. Based on the result of authenticating the portable terminal through communication by the communication unit, the vehicle door is locked or unlocked based on a communication area around the vehicle and having a communication unit communicating with the portable terminal existing in the communication area. An in-vehicle device of a keyless system that controls a lock,
An image processing unit that detects an object existing in the vicinity of the vehicle by performing image analysis on a captured image captured by the imaging unit that captures the periphery of the vehicle;
When an object is detected in the vicinity of the vehicle by the image processing unit, the communication unit is made to try communication, and based on whether or not the portable terminal that has communicated with the communication unit is unregistered, the communication area A control unit for detecting an object having the unregistered mobile terminal present;
An on-vehicle device comprising: an information presentation unit that presents information on the object detected by the control unit to an occupant of the vehicle. A vehicle information acquisition unit that acquires vehicle information indicating a state of the vehicle;
The control unit determines, based on the vehicle information acquired by the vehicle information acquisition unit, whether or not the vehicle state is to monitor the periphery of the vehicle, and if the vehicle is in the vehicle state, the communication A communication unit, and an object having the unregistered mobile terminal present in the communication area is detected based on whether or not the mobile terminal that has communicated with the communication unit is unregistered. The vehicle-mounted device according to claim 5. A plurality of communication units each having a communication area around the vehicle,
The said control part determines the communication part which tries communication from said some communication part based on the vehicle information which the said vehicle information acquisition part acquired, The Claim 4 or Claim 6 characterized by the above-mentioned. In-vehicle device. A plurality of communication units each having a communication area around the vehicle,
The in-vehicle device according to claim 4, wherein the control unit causes each of the plurality of communication units to sequentially try communication. A portable terminal of the vehicle periphery monitoring system according to any one of claims 1 to 3,
A mobile terminal side communication unit communicating with the communication unit of the in-vehicle device;
A portable terminal comprising: a control unit that determines presence / absence of registration in the vehicle-mounted device through communication by the portable terminal-side communication unit, and transmits a response signal corresponding to the determination result to the vehicle-mounted device by the portable terminal-side communication unit .

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