JP2008149771A - Inter-vehicle communication system and vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle-to-vehicle communication system and a vehicle capable of preventing a rear-end collision on a parked vehicle at night while keeping power consumption of a battery small.
In an inter-vehicle communication system 1 including a first vehicle 10 and a second vehicle 20, appeal information that the first vehicle 10 traveling at night appeals the presence of the vehicle toward the front. Is transmitted by modulation of the light A emitted from the front lamp 11_3, and the parked second vehicle 20 receives the light A from the first vehicle 10 and displays the appeal information. The information receiving means 21 to be extracted and presence display means 22 for receiving appeal information from the information receiving means 21 and visually appealing the presence of the vehicle are provided.
[Selection] Figure 1

Description

  The present invention relates to an inter-vehicle communication system and a vehicle for performing communication between vehicles.

  The vehicle is provided with lights such as a vehicle width lamp and a direction indicator for notifying the following vehicle of the state of the vehicle. Conventionally, there has been proposed a technique for notifying other vehicles of own vehicle information by controlling the lighting state of such a lighting device.

  For example, a technique has been proposed in which a lot of information (information such as characters indicating a vehicle state) is notified to surrounding vehicles using red, green, and blue LEDs in a vehicle lighting device (see Patent Document 1). .

  In addition, a technique has been proposed in which a situation in which an own vehicle is suddenly stopped is detected and a warning display of a preceding vehicle is detected, and a hazard lamp of the own vehicle is blinked to notify the following vehicle ( Patent Document 2).

In addition, based on traffic information acquired from the outside, there is a technology that forms an emergency traffic network with other vehicles and flashes a hazard lamp to notify the vehicle behind you when your vehicle is at the end. It has been proposed (see Patent Document 3).
JP 2002-270011 A Japanese Patent Laid-Open No. 2003-200782 JP 2004-362025 A

  Recently, there are an increasing number of accidents in which a motorcycle or bicycle including a bicycle collides with a vehicle parked on the road. According to a report from the Japan Traffic Accident Analysis Center, the death rate from personal injury is 0.79%, while the death rate from a rear-end collision with a parked vehicle is 3.5% (4.4 times). It has become. Looking at the number of collisions with parked vehicles, 70% of all fatal accidents occurred at night. For this reason, a technique for preventing a rear-end collision with a parked vehicle at night is important.

  Here, in order to prevent a rear-end collision accident on a parked vehicle at night, the LED proposed in Patent Document 1 and the hazard lamp proposed in Patent Documents 2 and 3 are always turned on or blinked. It needs to be in a state. However, this causes a problem that much of the electric power of the battery mounted on the vehicle is consumed.

  In view of the above circumstances, an object of the present invention is to provide a vehicle-to-vehicle communication system and a vehicle that can prevent a rear-end collision on a parked vehicle at night while keeping power consumption of the battery small.

The inter-vehicle communication system of the present invention that achieves the above object is
A first vehicle provided with information transmitting means for transmitting appeal information for appealing the presence of the vehicle toward the front, and information receiving means for receiving appeal information from the information transmitting means of the first vehicle; The information receiving means receives the appeal information from the information transmitting means, and has a second vehicle provided with presence display means for visually appealing the presence of the own vehicle.

  The inter-vehicle communication system of the present invention transmits appeal information that appeals the presence of the host vehicle (first vehicle) toward the front from the first vehicle, and receives the appeal information by the second vehicle. Since the presence of the vehicle (second vehicle) is visually appealed, the second vehicle parked at night will automatically receive the appeal information from the traveling first vehicle. All you need to do is flash or turn on a lamp to visually appeal the presence of the car. Therefore, compared with the technique in which the lamp is always blinked or lit regardless of whether the first vehicle is approaching or not, the power consumption of the battery mounted on the second vehicle is kept small while keeping the power consumption low. It is possible to prevent a rear-end collision with a parked vehicle in advance.

Here, the information transmitting means transmits the appeal information by modulation of light emitted from the headlight of the first vehicle.
The information receiving means preferably receives light emitted from the rear of the second vehicle and extracts the appeal information from the received light.

  When a vehicle travels at night according to the Road Traffic Law (Road Traffic Law), it is obliged to turn on a headlamp. Conventionally, a lamp having a mechanism based on a filament or electric discharge has been used as a headlamp. Recently, a blue LED that uses white light emitting LED has been developed. This LED can be lit at a high frequency. The light emitted from the LED can be modulated by using this high frequency as a carrier wave and a digital signal on the carrier wave. In the modulated emitted light, the digital signal and the carrier wave cannot be discriminated by human vision, and only appear to be always on. Therefore, when appeal information is transmitted by modulation of light emitted from the headlight of the first vehicle, and the second vehicle receives the light and extracts the appeal information from the received light, the vehicle is parked at night. The second vehicle can obtain various appeal information from the light emitted from the traveling first vehicle, and thus can sufficiently prevent a rear-end collision with a parked vehicle at night.

In addition, the second vehicle further receives the appeal information from the information transmitting unit of the first vehicle by the information receiving unit, and toward the first vehicle, the second vehicle A second information transmitting means for transmitting attribute information representing the attributes of the vehicle;
The first vehicle further includes second information receiving means for receiving attribute information from the second information transmitting means of the second vehicle, and the second information receiving means. It is also a preferred aspect that the apparatus further comprises attribute notification means for receiving the attribute information from the information transmitting means and notifying the driver of the first vehicle of the attribute of the second vehicle. The attribute information includes vehicle type, total length, width, height, and the like.

  In this way, the driver of the traveling first vehicle can obtain in advance the unique information of the second vehicle that is a parked vehicle.

Further, the presence display means appeals the presence of the second vehicle equipped with the presence display means by lighting or blinking the lamp, and the second information transmission means is emitted from the lamp. Transmitting attribute information representing the attribute of the second vehicle on which the second information transmitting means is mounted by modulation of light,
The second information receiving means receives light emitted from the front toward the first vehicle on which the second information receiving means is mounted, and extracts the attribute information from the received light. It is also preferable that there is.

  If it does in this way, communication of the attribute information performed between the 1st vehicle and the 2nd vehicle which is a parked vehicle is obliged to equip these 1st and 2nd vehicles. This can be done using a lamp.

The second vehicle further includes a camera that captures a rear vehicle and generates image information, and a third information transmission that transmits image information obtained by the camera to the first vehicle. Means and
The first vehicle further includes third information receiving means for receiving image information from the third information transmitting means of the second vehicle, and the third information receiving means. It is also a preferred aspect that the image display means is provided with receiving image information from the information transmitting means and displaying an image based on the image information toward the driver of the first vehicle.

  As described above, when the image based on the image information of the first vehicle obtained by the camera of the second vehicle is displayed on the image display means of the first vehicle, the driver of the first vehicle The distance from the second vehicle can be known with certainty.

Further, the second vehicle further directs the distance measuring means for measuring the approaching distance of the vehicle approaching from the rear, and distance information representing the distance measured by the distance measuring means to the first vehicle. And a fourth information transmitting means for transmitting
The first vehicle further includes fourth information receiving means for receiving distance information from the fourth information transmitting means of the second vehicle, and the fourth information receiving means. Collision avoidance control means for receiving the distance information from the information transmitting means and causing the own vehicle to perform a collision avoidance operation based on the distance to the second vehicle and the speed of the own vehicle. Is also preferable.

  In this way, even if the avoidance operation by the driver of the traveling first vehicle is not performed, the avoidance operation can be automatically performed in the first vehicle, and therefore parking at night is possible. A rear-end collision with the vehicle can be sufficiently prevented.

  The second vehicle of the vehicles of the present invention that achieves the above object includes information receiving means for receiving appeal information from a rear vehicle that transmits appeal information that appeals the presence of the vehicle toward the front, It is characterized by comprising presence display means for receiving the appeal information from the rear vehicle by the information receiving means and visually appealing the presence of the own vehicle.

  The second vehicle of the present invention receives the appeal information from the rear vehicle (first vehicle) that transmits the appeal information that appeals the presence of the vehicle toward the front, and visually indicates the presence of the vehicle. The second vehicle parked at night is a lamp for visually appealing the presence of the vehicle at the time of receiving the appeal information from the traveling first vehicle. Just blink or light up. Therefore, compared with the technique in which the lamp is always blinked or lit regardless of whether the first vehicle is approaching or not, the power consumption of the battery mounted on the second vehicle is kept small while keeping the power consumption low. It is possible to prevent a rear-end collision with a parked vehicle in advance.

  Here, it is preferable that the information receiving means is configured to receive light emitted from behind and extract the appeal information from the received light.

  In this way, the second vehicle parked at night can obtain various appeal information from the light emitted from the rear vehicle (first vehicle) that is running, and therefore park at night. A rear-end collision with the vehicle can be sufficiently prevented.

  Also, second information transmission for receiving the appeal information from the rear vehicle by the information receiving means and transmitting attribute information representing the attribute of the own vehicle to the rear vehicle (first vehicle). It is also a preferable aspect that the device is further provided.

  If it does in this way, the driver of the back vehicle under run can acquire specific information on the 2nd vehicle which is a parked vehicle beforehand.

  Further, the presence display means appeals the existence of the own vehicle by lighting or blinking of the lamp, and the second information transmitting means represents the attribute of the own vehicle by modulation of light emitted from the lamp. It is also preferable to transmit attribute information.

  In this case, the first and second vehicles may be provided with attribute information communication performed between the traveling rear vehicle (first vehicle) and the second vehicle that is the parked vehicle. This can be done using the required lamp.

  In a preferable aspect, the camera further includes a camera that captures the rear vehicle and generates image information, and third information transmission means that transmits image information obtained by the camera to the rear vehicle. is there.

  In this way, the driver of the rear vehicle can surely know the distance between the own vehicle and the second vehicle.

  Furthermore, distance measuring means for measuring the approaching distance of the vehicle approaching from behind, and fourth information transmitting means for transmitting distance information representing the distance measured by the distance measuring means to the rear vehicle. Further, it is also preferable to further provide.

  In this way, even if the avoidance operation by the driver of the rear vehicle during traveling is not performed, the avoidance operation can be automatically performed in the rear vehicle during travel, and therefore, the parked vehicle at night can be obtained. The rear-end collision accident can be sufficiently prevented.

  In addition, the first vehicle of the vehicles of the present invention that achieves the above-mentioned object is an information transmission for transmitting the appeal information for appealing the presence of the vehicle by modulating the light emitted from the headlights. Means are provided.

  Since the first vehicle of the present invention transmits the appeal information that appeals the presence of the own vehicle toward the front by modulation of light emitted from the headlamp, the front vehicle parked at night The (second vehicle) only needs to blink or turn on a lamp for visually appealing the presence of the host vehicle when the appeal information from the traveling first vehicle is received. Therefore, compared with the technology that always keeps the lamp blinking or lit regardless of whether or not the first vehicle is approaching, parking at night while keeping the power consumption of the battery mounted on the vehicle ahead is kept small. A rear-end collision with the vehicle can be prevented in advance.

  Here, the information reception which receives the attribute information from the front vehicle which receives the light irradiated from the rear, extracts the appeal information from the received light, and transmits the attribute information indicating the attribute of the own vehicle toward the rear It is preferable that the information receiving means includes an attribute notifying means for receiving the attribute information from the information receiving means and notifying the driver of the vehicle of the attribute of the preceding vehicle.

  If it does in this way, the driver | operator of the 1st vehicle in driving | running | working can acquire the specific information of the front vehicle (2nd vehicle) which is a parked vehicle in advance.

The preceding vehicle transmits attribute information representing an attribute of the own vehicle by modulation of light,
It is also a preferred aspect that the information receiving means receives light emitted toward the host vehicle from the preceding vehicle and extracts the attribute information from the received light.

  In this case, the first and second vehicles may be provided with attribute information communication performed between the traveling first vehicle and the forward vehicle (second vehicle) that is a parked vehicle. This can be done using the required lamp.

Further, the front vehicle further captures the rear vehicle to generate image information, and transmits the obtained image information to the rear,
The host vehicle further receives the image information from the second information receiving unit that receives the image information from the preceding vehicle and the second information receiving unit, and the image is directed toward the driver of the host vehicle. It is also preferable to include image display means for displaying an image based on information.

  If it does in this way, the driver of the 1st vehicle can know the distance etc. of the self-vehicle and the preceding vehicle (2nd vehicle) reliably.

Further, the front vehicle further measures the approach distance of the vehicle approaching from the rear, and transmits the distance information representing the measured distance to the rear,
The host vehicle further receives the distance information from the third information receiving means for receiving the distance information from the preceding vehicle and the distance information from the third information receiving means, and determines the distance between the host vehicle and the own vehicle. It is also a preferable aspect that the vehicle includes a collision avoidance control unit that causes the own vehicle to perform a collision avoidance operation based on the speed of the vehicle.

  In this way, even if the avoidance operation by the driver of the traveling first vehicle is not performed, the avoidance operation can be automatically performed in the first vehicle, and therefore parking at night is possible. A rear-end collision with the vehicle can be sufficiently prevented.

  According to the inter-vehicle communication system and the vehicle of the present invention, it is possible to prevent a rear-end collision on a parked vehicle at night while keeping power consumption of the battery small.

  Hereinafter, embodiments of the present invention will be described.

  FIG. 1 is a diagram showing an inter-vehicle communication system according to a first embodiment of the present invention.

  The inter-vehicle communication system 1 shown in FIG. 1 includes a first vehicle 10 and a second vehicle 20. Here, the 1st vehicle 10 is 1st Embodiment of the 1st vehicle of this invention, and the 2nd vehicle 20 is 1st Embodiment of the 2nd vehicle of this invention.

  The first vehicle 10 is a passenger car, and the first vehicle 10 is provided with information transmitting means 11 for transmitting appeal information that appeals the presence of the vehicle toward the front. This information transmission means 11 transmits appeal information by modulation of light A emitted from the front lamp 11_3 (corresponding to the headlamp in the present invention) of the first vehicle 10.

  The second vehicle 10 is a wagon car. The second vehicle 20 includes information receiving means 21 for receiving appeal information by modulation of light A from the information transmitting means 11 of the first vehicle 10, and this information. Upon receiving the appeal information from the information sending means 11 by the receiving means 21, there is provided presence display means 22 for visually appealing the presence of the vehicle. The information receiving means 21 receives the light A irradiated from the rear of the second vehicle 10 and extracts appeal information from the received light.

  In addition, the second vehicle 20 further receives the appeal information from the information transmitting unit 11 of the first vehicle 10 by the information receiving unit 21, and then proceeds to the second vehicle 20 toward the first vehicle 10. Information transmitting means 23 (corresponding to the second information transmitting means in the present invention) for transmitting attribute information representing the attribute of the vehicle 20 is provided. The attribute information includes vehicle type, total length, width, height, and the like.

  On the other hand, the first vehicle 10 further includes information receiving means 12 (corresponding to the second information receiving means in the present invention) for receiving attribute information from the information transmitting means 23 of the second vehicle 20, and this Attribute notification means 13 for receiving the attribute information from the information transmission means 23 by the information receiving means 12 and notifying the attribute of the second vehicle 20 to the driver of the first vehicle 10 is provided. Yes.

  Here, the presence display means 22 provided in the second vehicle 20 appeals the presence of the second vehicle 20 by turning on (or blinking) the rear lamp 22_2 (see FIG. 2). Moreover, the information transmission means 23 transmits the attribute information showing the attribute of the 2nd vehicle 20 by the modulation | alteration of the light B emitted from the rear lamp | ramp 22_2.

  On the other hand, the information receiving means 12 provided in the first vehicle 10 receives the light B emitted from the front toward the first vehicle 10 and extracts attribute information from the received light. .

  FIG. 2 is a diagram showing a configuration of first and second vehicles in the inter-vehicle communication system shown in FIG.

  First, the operation of optical communication on the first vehicle 10 side that is an approaching vehicle will be described.

  FIG. 2 shows the information transmission means 11, the information reception means 12, and the attribute notification means 13 that are also included in FIG. 1 and constitute the first vehicle 10. A CPU 14 and vehicle attribute data 15 are also shown.

  The information transmission means 11 includes a carrier wave transmitter 11_1, a modulator 11_2, a front lamp 11_3, and a lighting power source 11_4. The information receiving means 12 includes a light receiving unit 12_1 and a demodulator 12_2. Furthermore, the attribute notification means 13 is comprised from the audio | voice generation part 13_1 and the display part 13_2.

  When the first vehicle 10 running at night turns on the front lamp 11_3, the CPU 14 reads out vehicle attribute data 15 (attribute data such as vehicle type, total length, width, height) as appeal information. Output to the modulator 11_2. The modulator 11_2 receives the vehicle attribute data 15 from the CPU 14 and the carrier wave from the carrier wave transmitter 11_1, puts the vehicle attribute data 15 on the carrier wave, and sends it to the front lamp 11_3. To the front lamp 11_3, a voltage from the lighting power supply 11_4 is applied and a carrier wave on which the vehicle attribute data from the modulator 11_2 is carried is input. Thereby, the emitted light A by the carrier wave modulated by the vehicle attribute data 15 is projected forward from the front lamp 11_3. In this way, appeal information that appeals the presence of the host vehicle is transmitted from the first vehicle 10 forward. This appeal information is always transmitted while the first vehicle 10 is traveling. The information receiving unit 12 and the attribute notification unit 13 will be described later.

  Next, the operation of optical communication on the second vehicle 20 side that is a parked vehicle will be described.

  FIG. 2 shows information receiving means 21, presence display means 22, and information sending means 23, which are also shown in FIG. 1, constituting the second vehicle 20. A CPU 24, vehicle attribute data 25, and a parking mode setting mechanism 26 are also shown.

  The information receiving means 21 includes a light receiving unit 21_1 and a demodulator 21_2. In addition, the presence display unit 22 includes a lighting power source 22_1 and a rear lighting device 22_2. Further, the information transmitting means 23 is composed of a carrier wave transmitter 23_1 and a modulator 23_2.

  When the second vehicle 20 is parked at night, the second vehicle 20 is set in the parking mode by the parking mode setting mechanism 26. Thereby, the information receiving means 21 provided in the rear part of the 2nd vehicle 20 functions. In this information receiving means 21, the light emitting light A from the first vehicle 10 is received by the light receiving unit 21_1, and the demodulator 21_2 extracts appeal information from the received light A.

  Next, the rear lamp 22_2 is turned on. Here, when the rear lamp 22_2 is lit, the CPU 24 reads out the vehicle attribute data 25 (attribute data such as vehicle type, total length, width, height, etc.) that is the appeal information of the second vehicle 20 and reads it into the modulator 23_2. Output. The modulator 23_2 receives the vehicle attribute data 25 from the CPU 24 and the carrier wave from the carrier wave transmitter 23_1, puts the vehicle attribute data 25 on the carrier wave, and sends the vehicle attribute data 25 toward the rear lamp 22_2. The rear lamp 22_2 is supplied with a voltage from the lighting power source 22_1 and a carrier wave on which the vehicle attribute data 25 from the modulator 23_2 is carried. Thereby, the emitted light B by the carrier wave modulated by the vehicle attribute data 25 is projected backward from the rear lamp 22_2. In this way, the presence of the own vehicle is visually appealed to the driver of the first vehicle 10 that is an approaching vehicle, and the vehicle attribute data 25 of the own vehicle is transmitted.

  In the first vehicle 10, the emitted light B from the second vehicle 20 is received by the light receiving unit 12_1, and the vehicle attribute data 25 is extracted from the received light B by the demodulator 12_2. Next, based on the extracted vehicle attribute data 25, the sound generation unit 13_1 emits a warning sound and the display unit 13_2 blinks light or lights an icon, so that the second vehicle 20 that is a parked vehicle is present. Is warned to the driver of the first vehicle 10 which is an approaching vehicle. When information indicating that the vehicle is a long-length vehicle (such as a trailer) is received from the vehicle attribute data 25, a warning is given, a different light blinks, or a different icon is lit to call attention. To do.

  FIG. 3 is a diagram showing a schematic operation flow up to the standby state of the first and second vehicles in the inter-vehicle communication system shown in FIG.

  In this inter-vehicle communication system 1, when the second vehicle 20 is parked in step S1, the second vehicle 20 is set in the parking mode and stands by. In step S2, the first vehicle 10 that is a traveling vehicle lights the front lamp 11_3. Next, in step S3, the first vehicle 10 waits after modulating the light from the front lamp 11_3 with the vehicle attribute data 15 of the own vehicle.

  FIG. 4 is a diagram illustrating an operation flow of the second vehicle that is a parked vehicle in the inter-vehicle communication system illustrated in FIG. 1.

  In step S11, the traveling vehicle (first vehicle 10) approaches the parked vehicle (second vehicle 20). Then, in step S12, the parked vehicle senses light from the traveling vehicle at the light receiving unit.

  In step S13, it is determined whether or not the light from the traveling vehicle is modulated. If it is determined that the light from the traveling vehicle is not modulated, the process proceeds to step S14. In step S14, the parked vehicle does nothing and ends this flow. On the other hand, if it is determined that the light from the traveling vehicle is modulated, the process proceeds to step S15. In step S15, the rear lamp is turned on. Next, in step S16, the vehicle attribute data of the own vehicle (parked vehicle) is read, and the process proceeds to step S17.

  In step S17, light is modulated with the vehicle attribute data, and this flow ends.

  FIG. 5 is a diagram showing an operation flow of the first vehicle, which is a traveling vehicle, in the inter-vehicle communication system shown in FIG.

  In step S21, the traveling vehicle (first vehicle 10) approaches the parked vehicle (second vehicle 20). Then, in step S22, the traveling vehicle senses light from the parked vehicle at the light receiving unit.

  In step S23, it is determined whether or not the light from the parked vehicle is modulated. If it is determined that the light from the parked vehicle is not modulated, the process proceeds to step S24. In step S24, the traveling vehicle does nothing and ends this flow. On the other hand, if it is determined that the light from the parked vehicle is modulated, the process proceeds to step S25. In step S25, the driver visually confirms that the rear lamp of the parked vehicle is turned on. In step S26, a warning sound is generated from the sound generation unit of the traveling vehicle, and the process proceeds to step S27. Furthermore, in step S27, the attribute data of the parked vehicle is displayed on the display unit of the traveling vehicle, and this flow is finished. In this way, an accident in which the first vehicle 10 traveling on the second vehicle 20 collides with the second vehicle 20 while the power consumption of the battery of the second vehicle 20 parked at night is suppressed to a low level. Can be prevented.

  In the inter-vehicle communication system 1 described above, the example of the passenger car is described as the traveling vehicle (first vehicle 10). However, the traveling vehicle may be a bicycle as described below.

  FIG. 6 is a diagram illustrating a configuration of a bicycle as a traveling vehicle in the inter-vehicle communication system according to the second embodiment of the present invention.

  FIG. 6 shows information transmitting means 111 and vehicle attribute data 115 constituting the bicycle 100.

  The information transmission means 111 includes a modulator 111_2, a front lamp 111_3, and a lighting power source 111_4. The bicycle 100 running at night outputs the vehicle attribute data 115 to the modulator 111_2 as appeal information with the front lamp 111_3 turned on. The modulator 111_2 puts the vehicle attribute data 115 on a carrier wave and sends it to the front lamp 111_3. The front lamp 111_3 receives a voltage from the lighting power supply 111_4 and a carrier wave on which the vehicle attribute data from the modulator 111_2 is carried. Thereby, the emitted light C by the carrier wave modulated by the vehicle attribute data 115 is projected forward from the front lighting device 111_3. In this way, appeal information for appealing the existence of the bicycle 100 is transmitted from the bicycle 100 forward. The second vehicle 20 receives the emitted light C and lights the rear lamp 22_2 as described above. In this way, the presence of the second vehicle 20 is visually appealed to the driver of the bicycle 100 that is an approaching vehicle.

  FIG. 7 is a diagram showing an operation flow of the second vehicle, which is a parked vehicle, with respect to the bicycle shown in FIG.

  In step S31, the traveling vehicle (bicycle 100) approaches the parked vehicle (second vehicle 20). Then, in step S32, the parked vehicle senses light from the traveling vehicle at the light receiving unit.

  In step S33, it is determined whether or not the light from the traveling vehicle is modulated. If it is determined that the light from the traveling vehicle is not modulated, the process proceeds to step S34. In step S34, the parked vehicle does nothing and ends this flow. On the other hand, if it is determined that the light from the traveling vehicle is modulated, the process proceeds to step S35. In step S35, the rear lamp is turned on and this flow is finished.

  FIG. 8 is a diagram showing an operation flow of a bicycle that is a traveling vehicle.

  In step S41, the traveling vehicle (bicycle 100) approaches the parked vehicle (second vehicle 20). Then, in step S42, the parked vehicle senses light from the traveling vehicle at the light receiving unit.

  In step S43, the driver visually confirms lighting of the rear lamp of the parked vehicle, and this flow is finished.

  In this way, it is possible to prevent an accident in which a bicycle collides with the parked vehicle while keeping power consumption of the battery of the vehicle parked at night small.

  FIG. 9 is a diagram showing an inter-vehicle communication system according to a third embodiment of the present invention.

  In addition, the same code | symbol is attached | subjected to the same component as the component in the inter-vehicle communication system 1 of 1st Embodiment of this invention mentioned above, and a different point is demonstrated.

  The inter-vehicle communication system 3 according to the third embodiment shown in FIG. 9 includes a first vehicle 30 and a second vehicle 40. Here, the 1st vehicle 30 is 2nd Embodiment of the 1st vehicle of this invention, and the 2nd vehicle 40 is 2nd Embodiment of the 2nd vehicle of this invention.

  The second vehicle 40 includes a camera 41 that captures a rear vehicle and generates image information, and an information transmission unit 43 that transmits image information obtained by the camera 41 to the first vehicle 30 (this book). Equivalent to the third information transmission means referred to in the invention).

  On the other hand, the first vehicle 30 includes an information receiving means 32 (corresponding to the third information receiving means of the present invention) for receiving image information from the information transmitting means 43 of the second vehicle 40, and the information receiving means 32. The image display means 33 which receives the image information from the information transmission means 43 and displays an image based on the image information for the driver of the first vehicle 30 is provided.

  The second vehicle 40 further includes a distance / number detection unit 44 (corresponding to the distance measuring means in the present invention) for measuring the approach distance of a vehicle approaching from the rear and measuring the number of vehicles, and its Information transmission means 43 (corresponding to the fourth information transmission means in the present invention) for transmitting distance / number information representing the distance / number measured by the distance / number detection unit 44 to the first vehicle 30 is provided. It has been.

  On the other hand, the information receiving means 32 provided in the first vehicle 30 further receives distance / number information from the information transmitting means 43 of the second vehicle 40, and is a fourth information receiving means according to the present invention. It also plays a role. In addition, the first vehicle 30 receives the distance / number information from the information transmitting unit 43 by the information receiving unit 32, and determines the distance to the second vehicle 40 and the speed of the host vehicle. There is provided a collision avoidance control means 34 for causing the own vehicle to perform a collision avoidance operation based on it.

  FIG. 10 is a diagram showing a system configuration of the first and second vehicles in the inter-vehicle communication system shown in FIG.

  The parked second vehicle 40 obtains the number of approaching vehicles from the images obtained by photographing with the camera 41. Further, distance information is obtained from the AF mechanism provided in the camera 41. The second parked vehicle 40 adds these two pieces of information to the vehicle attribute data emitted from the rear lighting device 21_1 and transmits the information to the first vehicle 30. By doing in this way, the 1st vehicle 30 which is an approaching vehicle can be utilized as information which cannot be obtained independently.

  In addition, the first vehicle 30 detects whether or not a confirmation or avoidance operation has been performed by the driver's operation by the collision risk detection mechanism 34_1. When the collision avoidance abandonment distance is reached, the vehicle control unit automatically The brake mechanism 34_3 is operated via 34_2. A collision avoidance control unit 34 is configured by the collision risk detection mechanism 34_1, the vehicle control unit 34_2, and the brake mechanism 34_3. When information indicating that a plurality of vehicles are approaching is received, different types of warning sounds and approach detection display icons are turned on. By doing so, it is possible to avoid a contact accident with another vehicle traveling in an overtaking lane or the like.

  FIG. 11 is a diagram illustrating an operation flow of a second vehicle that is a parked vehicle in the inter-vehicle communication system illustrated in FIGS. 9 and 10.

  In step S51, the traveling vehicle (first vehicle 30) approaches the parked vehicle (second vehicle 40). Then, in step S52, the parked vehicle senses light from the traveling vehicle at the light receiving unit.

  In step S53, it is determined whether or not the light from the traveling vehicle is modulated. If it is determined that the light from the traveling vehicle is not modulated, the process proceeds to step S54. In step S54, the parked vehicle does nothing and ends this flow. On the other hand, if it is determined that the light from the traveling vehicle is modulated, the process proceeds to step S55. In step S55, the rear lamp is turned on. Next, in step S56, the vehicle attribute data of the own vehicle (parked vehicle) is read, and the process proceeds to step S57.

  In step S57, the camera 41 detects the distance and the number of approaching vehicles, and proceeds to step S58. In step S58, the distance and the number of approaching vehicles are added to the vehicle attribute data and modulated, and this flow ends.

  FIG. 12 is a diagram showing an operation flow of the first vehicle, which is a traveling vehicle, in the inter-vehicle communication system shown in FIGS. 9 and 10.

  In step S61, the traveling vehicle (first vehicle 30) approaches the parked vehicle (second vehicle 40). Then, in step S62, the traveling vehicle senses light from the parked vehicle at the light receiving unit.

  In step S63, it is determined whether or not the light from the parked vehicle is modulated. If it is determined that the light from the parked vehicle is not modulated, the process proceeds to step S64. In step S64, the traveling vehicle does nothing and ends this flow. On the other hand, if it is determined that the light from the parked vehicle is modulated, the process proceeds to step S65. In step S65, the driver visually confirms that the rear lamp of the parked vehicle is turned on. Next, in step S66, a warning sound is generated from the sound generation unit of the traveling vehicle, and the process proceeds to step S67. In step S67, the attribute data of the parked vehicle is displayed on the image display means of the traveling vehicle. Further, in step S68, other traveling vehicle information (distance and number) is displayed. Next, in step S69, the traveling speed and distance of the own vehicle are calculated, and the process proceeds to step S70.

  In step S70, it is determined whether the driver has performed a confirmation operation. The confirmation operation here refers to an operation in which the driver applies a brake, changes lanes, presses a predetermined button, or makes a sound. If it is determined that the driver has performed a confirmation operation, this flow is terminated. On the other hand, if it is determined that the driver is not performing the confirmation operation, the process proceeds to step S71. In step S71, when the dangerous distance is reached, the brake is applied and this flow is finished. Thus, even if the avoidance operation by the driver of the traveling first vehicle 30 is not performed, the avoidance operation is automatically performed. Therefore, the second vehicle 40 that is a parked vehicle at night is used. The rear-end collision accident can be sufficiently prevented.

It is a figure which shows the communication system between vehicles of 1st Embodiment of this invention. It is a figure which shows the structure of the 1st, 2nd vehicle in the communication system between vehicles shown in FIG. It is a figure which shows the schematic operation | movement flow until it reaches the standby state of the 1st, 2nd vehicle in the communication system between vehicles shown in FIG. It is a figure which shows the operation | movement flow of the 2nd vehicle which is a parked vehicle of the communication system between vehicles shown in FIG. It is a figure which shows the operation | movement flow of the 1st vehicle which is a traveling vehicle of the communication system between vehicles shown in FIG. It is a figure which shows the structure of the bicycle as a traveling vehicle of the communication system between vehicles of 2nd Embodiment of this invention. It is a figure which shows the operation | movement flow of the 2nd vehicle which is a parked vehicle with respect to the bicycle shown in FIG. It is a figure which shows the operation | movement flow of the bicycle which is a traveling vehicle. It is a figure which shows the communication system between vehicles of 3rd Embodiment of this invention. It is a figure which shows the system configuration | structure of the 1st, 2nd vehicle in the communication system between vehicles shown in FIG. It is a figure which shows the operation | movement flow of the 2nd vehicle which is a parked vehicle of the inter-vehicle communication system shown to FIG. 9, FIG. It is a figure which shows the operation | movement flow of the 1st vehicle which is a traveling vehicle of the inter-vehicle communication system shown to FIG. 9, FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,3 Inter-vehicle communication system 10,30 1st vehicle 11,111 Information transmission means 11_1,23_1,43_1 Carrier wave transmitter 11_2,23_2,111_2,43_2 Modulator 11_3, 111_3 Front lamp 11_4, 22_1, 111_4 Power supply 12, 32 Information receiving means 12_1, 21_1, 32_1 Light receiving part 12_2, 21_2, 32_2 Demodulator 13 Attribute notifying means 13_1 Voice generating part 13_2 Display part 14, 24 CPU
15, 25, 115 Vehicle attribute data 20, 40 Second vehicle 21 Information receiving means 22 Presence display means 22_2 Rear lamp 23, 43 Information sending means 26 Parking mode setting mechanism 33 Image display means 34 Collision avoidance control means 34_1 Collision risk Detection mechanism 34_2 Vehicle control unit 34_3 Brake mechanism 41 Camera 44 Distance / number detection unit 100 Bicycle

Claims (17)

A first vehicle provided with information transmitting means for transmitting appeal information for appealing the presence of the vehicle toward the front, and information receiving means for receiving appeal information from the information transmitting means of the first vehicle; A vehicle comprising: a second vehicle provided with presence display means for visually appealing the presence of the vehicle upon receipt of appeal information from the information transmission means by the information receiving means. Communication system. The information transmitting means transmits the appeal information by modulation of light emitted from a headlight of the first vehicle,
2. The inter-vehicle communication system according to claim 1, wherein the information receiving means receives light emitted from behind the second vehicle and extracts the appeal information from the received light. The second vehicle further receives appeal information from the information transmitting means of the first vehicle by the information receiving means, and is directed toward the first vehicle. A second information transmission means for transmitting attribute information representing an attribute;
The first vehicle further includes second information receiving means for receiving attribute information from the second information transmitting means of the second vehicle, and the second information receiving means. 2. An attribute notification means for receiving the attribute information from the information transmitting means and notifying the driver of the first vehicle of the attribute of the second vehicle. Vehicle-to-vehicle communication system. The presence display means appeals the presence of the second vehicle on which the presence display means is mounted by lighting or blinking the lamp, and the second information transmission means is configured to transmit light emitted from the lamp. Transmitting attribute information representing an attribute of the second vehicle on which the second information transmitting means is mounted by modulation,
The second information receiving means receives light emitted from the front toward the first vehicle on which the second information receiving means is mounted, and extracts the attribute information from the received light. The inter-vehicle communication system according to claim 3, wherein the inter-vehicle communication system is provided. The second vehicle further includes a camera that captures a rear vehicle and generates image information, and third information transmission means that transmits image information obtained by the camera to the first vehicle. With
The first vehicle further includes third information receiving means for receiving image information from the third information transmitting means of the second vehicle, and the third information receiving means. The image display means for receiving the image information from the information transmission means and displaying an image based on the image information toward the driver of the first vehicle. Inter-vehicle communication system. The second vehicle further transmits to the first vehicle distance measurement means for measuring the approach distance of the vehicle approaching from the rear, and distance information representing the distance measured by the distance measurement means. And a fourth information sending means
The first vehicle further includes a fourth information receiving unit that receives distance information from the fourth information transmitting unit of the second vehicle, and the fourth information receiving unit. Collision avoidance control means for receiving the distance information from the information transmitting means and causing the own vehicle to perform a collision avoidance operation based on the distance to the second vehicle and the speed of the own vehicle. The inter-vehicle communication system according to claim 1.   Receiving the appeal information from the rear vehicle by the information receiving means for receiving the appeal information from the rear vehicle for transmitting the appeal information for appealing the presence of the own vehicle toward the front, and receiving the appeal information from the rear vehicle, A vehicle comprising presence display means for visually appealing the presence of a vehicle.   8. The vehicle according to claim 7, wherein the information receiving means receives light emitted from behind and extracts the appeal information from the received light.   The information receiving means further comprises second information transmitting means for receiving the appeal information from the vehicle behind the vehicle and transmitting attribute information representing the attribute of the vehicle toward the vehicle behind the vehicle. 8. The vehicle according to claim 7, wherein   The presence display means appeals the presence of the host vehicle by lighting or blinking of the lamp, and the second information transmitting unit is attribute information representing an attribute of the host vehicle by modulation of light emitted from the lamp. The vehicle according to claim 9, wherein the vehicle is transmitted.   The camera further comprising: a camera that captures a rear vehicle and generates image information; and third information transmission means that transmits image information obtained by the camera to the rear vehicle. 7. The vehicle according to 7.   Distance measuring means for measuring the approaching distance of a vehicle approaching from behind, and fourth information transmitting means for transmitting distance information representing the distance measured by the distance measuring means to the rear vehicle, 8. The vehicle according to claim 7, further comprising:   A vehicle comprising information transmitting means for transmitting appeal information that appeals the presence of the vehicle toward the front by modulation of light emitted from a headlamp.   Information receiving means for receiving attribute information from a preceding vehicle that receives light emitted from the rear and extracts the appeal information from the received light and transmits attribute information indicating the attributes of the vehicle toward the rear; and 14. The vehicle according to claim 13, further comprising attribute notification means for receiving the attribute information from the information receiving means and notifying the driver of the vehicle of the attribute of the preceding vehicle. The preceding vehicle transmits attribute information representing an attribute of the own vehicle by modulation of light,
The vehicle according to claim 14, wherein the information receiving unit is configured to receive light emitted toward the host vehicle from the preceding vehicle and extract the attribute information from the received light. The front vehicle further captures the rear vehicle to generate image information, and transmits the obtained image information to the rear,
The host vehicle further receives a second information receiving unit that receives the image information from the preceding vehicle and the image information received by the second information receiving unit, and the image is directed toward the driver of the host vehicle. 14. The vehicle according to claim 13, further comprising image display means for displaying an image based on the information. The front vehicle further measures the approach distance of a vehicle approaching from behind, and transmits distance information representing the measured distance to the rear,
The host vehicle further receives a distance information from the preceding vehicle and a third information receiving unit that receives the distance information from the preceding vehicle, and receives the distance information from the third information receiving unit. The vehicle according to claim 13, further comprising a collision avoidance control unit that causes the host vehicle to perform a collision avoidance operation based on the speed of the vehicle.

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