JP2000335277A - Driving assistance system for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To activate a following-distance alarming device automatically for improving driving safety when a cellular phone is in communication such as receiving or transmitting a call while driving a vehicle. SOLUTION: In this system, a communication state detection part 2 for detecting a communication state of a cellular phone, a speaker 3, and following- distance alarming device 4 for alarming when a following-distance becomes a prescribed value or less are connected to a control part 1. The following- distance alarming device 4 is configured with an operation switch 5, laser radar 6 for detecting the following distance, alarming part 7 and alarming control part 8. The communication state detection part 2 monitors radio waves transmitted from the cellular phone and outputs a communication signal to the control part 1 when the cellular phone receives or transmits a call or is being used for communication at that time and therefore strong radio waves are monitored. The control part 1, when the communication signal is input, informs a driver that the following-distance alarming device 4 will activate via the speaker 3 and then activates it. When the cellular phone becomes unused, the following- distance alarming device 4 stops.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving assistance system for a vehicle, which controls the operation of a driving assistance device when a mobile communication device placed in a vehicle enters a calling, incoming or communication state.

[0002]

2. Description of the Related Art In recent years, in order to improve the safety when using a mobile communication device during driving, research has been conducted on how to effectively use a driving assistance system such as an inter-vehicle distance control type constant speed traveling device. . Japanese Patent Application Laid-Open No. 10-67254 discloses a method of measuring a distance between a vehicle and a preceding vehicle or an obstacle ahead, and issuing an alarm when the distance between the vehicles becomes smaller than a predetermined distance at which a collision may occur. An inter-vehicle distance control type constant-speed traveling device that performs a constant speed traveling while maintaining a preset following inter-vehicle distance setting value following the preceding vehicle and following the preceding vehicle. If the mobile communication device is used while the apparatus is operating and traveling, an alarm is issued by increasing the following inter-vehicle distance set value and performing constant speed traveling without changing the distance at which the alarm is issued. There is disclosed a driving assistance system that reduces the frequency and improves the usability when the driver performs communication using a mobile communication device while traveling.

[0003]

However, in the above-described conventional example, when the driver uses the mobile communication device, that is, when the driver makes a telephone call or when the driver is going to receive a telephone call, the prior art is required. Activating the inter-vehicle distance control type cruise control system can improve the usability of the telephone.However, when a call is received when the driver does not expect it, or when the inter-vehicle distance control type cruise control system is activated. If not, there is a problem that the effect cannot be obtained.

[0004] Further, when the telephone is used while the vehicle is traveling by activating the inter-vehicle distance control type constant-speed traveling device, the following inter-vehicle distance is set to a large value when the preceding vehicle follows the preceding vehicle, and the frequency of alarm generation is reduced. Although it was reduced, there was a risk that it would concentrate too much on calls. In view of such a conventional problem, the present invention can automatically activate a driving assist device when an incoming or outgoing call of a mobile communication device is made during traveling. It is an object of the present invention to provide a vehicle driving assistance system that can prevent the mobile communication device from being excessively concentrated on calls.

[0005]

According to the first aspect of the present invention, there is provided a communication state detecting unit for detecting a communication state of a mobile communication device placed in a vehicle, and a surrounding state of the vehicle. A driving assist device that detects driving and assists driving according to the surrounding situation, and a control unit that activates the driving assist device when the communication state detection unit detects that the mobile communication device is in a communication state. It had it.

According to the second aspect of the present invention, a communication state detection unit for detecting a communication state of a mobile communication device placed in a vehicle, and a surrounding state of the vehicle are detected to provide driving assistance according to the surrounding state. Driving in the normal mode or in the communication mode in which the driving assistance function is changed in a direction that increases the driver's awareness of driving by changing the driving assistance function performed in the normal mode according to the surrounding situation by detecting the surrounding situation of the vehicle Auxiliary equipment,
When the communication state detecting unit detects that the mobile communication device is in the communication state, the control unit activates the driving assist device in the communication mode.

According to the third aspect of the present invention, the control unit terminates the operation in the communication mode if the driving assistance device operates in the normal mode before operating the driving assistance device in the communication mode. Occasionally, it will be operated again in normal mode.

According to a fourth aspect of the present invention, the driving assistance device is an inter-vehicle distance alarm device that detects a distance between a vehicle and an object existing in front of the vehicle and issues an alarm according to the detected distance. In, the detected distance is the first
If the detected distance is equal to or less than a predetermined value, an alarm corresponding to the distance is issued. An alarm was issued.

According to a fifth aspect of the present invention, the driving assist device is a preceding-vehicle-following type auto-cruise device that detects a distance between the vehicle and a preceding vehicle and controls a traveling speed in accordance with the distance between the vehicles. , Detects the distance between the vehicle and the preceding vehicle, controls the running speed of the vehicle so that the distance between the vehicle and the preceding vehicle is kept constant, and detects the distance between the vehicle and the preceding vehicle in the communication mode, and decelerates the vehicle ahead. In such a case, the vehicle is decelerated so as to maintain a constant inter-vehicle distance with the preceding vehicle, and no acceleration is performed even when the preceding vehicle accelerates.

According to the present invention, the communication state detecting section determines whether or not the mobile communication device placed near the driver's seat is in a communication state based on the communication strength. When the placed mobile communication device is in the communication state, it is detected that the mobile communication device is in the communication state.

[0011] According to the present invention, the communication state detecting unit determines whether or not the mobile communication device placed outside of the vicinity of the driver's seat is in a call receiving state based on the communication strength. During a predetermined time after receiving a call, it is determined that the communication state is established regardless of the communication intensity.

[0012]

According to the first aspect of the present invention, when the mobile communication device enters a communication state such as incoming call, outgoing call or telephone call, the driving assist device automatically operates, so that the driver does not expect it. Sometimes when a mobile communication device receives an incoming call,
Even when the mobile communication device enters a communication state when the driving vehicle does not operate the driving assist device, the driving assist device operates, so that the usability can be reliably improved.

According to the second aspect of the present invention, when the mobile communication device is in a communication state, the driving assist function is provided to the driver to increase the driver's awareness of driving from the normal mode used during normal driving. In the communication mode in which the driving assistance is changed to the driving assistance device, the driving assistance device automatically operates, so that when the mobile communication device is used while the vehicle is traveling, the driver is prevented from concentrating on talking.

According to the third aspect of the present invention, if the driving assist device operates before the mobile communication device enters the communication state, the driving assist device is operated in the communication mode in the communication state, and the communication state is changed. When the operation is completed, by operating the driving assist device again in the normal mode, in addition to the effect of claim 2, the operation in the normal mode can be continued after the communication by the mobile communication device is ended. .

According to the fourth aspect of the present invention, in the normal mode, the distance between the vehicle and the object existing in front of the vehicle is detected, and if the distance is equal to or less than the first predetermined value, an alarm is issued and the communication is performed. In the mode, the distance between the vehicle and an object existing in front of the vehicle is detected, and if the distance is equal to or smaller than a second predetermined value that is larger than the first predetermined value, an alarm is issued, thereby using the mobile communication device. In the case of, a warning is issued at a stage where the inter-vehicle distance is longer than usual, and the frequency of occurrence of the warning is increased.

According to the fifth aspect of the present invention, in the normal mode, the inter-vehicle distance to the preceding vehicle is detected, and the traveling speed is controlled so as to keep the inter-vehicle distance to the preceding vehicle constant. When the preceding vehicle decelerates, the driver decelerates while maintaining a certain inter-vehicle distance and does not accelerate, so the driver himself has to perform acceleration control, so he concentrates too much on talking Is prevented.

According to the present invention, the passenger uses the mobile communication device by detecting that the mobile communication device placed near the driver's seat is in the communication state when the communication state is established. Nevertheless, it is possible to prevent the driving assist device from automatically operating.

According to the present invention, the driver holds the mobile communication device by detecting that the mobile communication device is in a communication state for a predetermined time after receiving a call at a mobile communication device placed near the driver's seat. The driver assist device is automatically activated even when a call arrives at a mobile communication device placed in a passenger's seat or the like, not limited to the mobile communication device. The safety at the time of taking out from is improved.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to examples. FIG. 1 is a diagram showing the configuration of the first exemplary embodiment of the present invention. The control unit 1 includes a communication state detection unit 2 for detecting a communication state of a mobile phone as a mobile communication device, a speaker 3, and an inter-vehicle distance alarm device 4 for issuing an alarm when the inter-vehicle distance becomes a predetermined value or less. Is connected. The inter-vehicle distance alarm device 4 controls the operation of an operation switch 5 for starting and releasing the inter-vehicle distance alarm device 4, a laser radar 6 for detecting the inter-vehicle distance, an alarm unit 7 that emits an alarm sound, and an operation of the inter-vehicle distance alarm device. It comprises an alarm control unit 8.

The inter-vehicle distance warning device 4 operates when the driver turns on the operation switch 5 or under the control of the control unit 1 described later. When the inter-vehicle distance alarm device 4 is activated, the laser radar 6 detects the inter-vehicle distance from the preceding vehicle and outputs the detected distance to the alarm control unit 8.

The laser radar 6 transmits a laser beam, receives reflected light from an object existing ahead including a preceding vehicle, and measures the time from transmission to reception of light to detect the inter-vehicle distance. In the alarm control unit 8, the inter-vehicle distance is 40 m
When the following occurs, the buzzer beeps once from the alarm unit 7. When the distance between vehicles becomes less than 30 m, the buzzer sounds continuously. The inter-vehicle distance warning device 4 constitutes the driving assistance device of the invention.

Next, the operation of the present system will be described. First, when an ignition switch (not shown) is turned on, the communication state detection unit 2 monitors the transmitted radio wave of the mobile phone,
When the mobile phone is in an outgoing call, incoming call, or call state, and the transmitted radio wave from the mobile phone becomes strong, a communication signal is output to the control unit 1.

Hereinafter, the operation of the control unit 1 will be described with reference to the flowchart shown in FIG. In step 101, it is determined whether or not a communication signal has been input from the communication state detection unit 2. If a communication signal has been input, step 102
Proceed to. If no communication signal is input, step 1
01 is repeated at predetermined time intervals. In step 102,
It is determined whether or not the inter-vehicle distance alarm device 4 is operating.
If the inter-vehicle distance alarm device 4 is activated, step 101
Return to If the inter-vehicle distance alarm device 4 is not operating, the process proceeds to step 103.

In step 103, the following distance warning device 4
Is notified from the speaker 3 to the driver.
In step 104, the inter-vehicle distance alarm device 4 is operated. In step 105, it is determined whether or not a communication signal has been input from the communication state detection unit 2. If a communication signal has been input, step 105 is repeated at predetermined time intervals. If no communication signal has been input, step 106
Proceed to. In step 106, since the use of the mobile phone has been finished, the driver is notified from the speaker 3 to stop the operation of the inter-vehicle distance alarm device 4. Step 107
Then, the inter-vehicle distance alarm device 4 is stopped, and Step 101
Return to

When the portable telephone enters a communication state such as incoming, outgoing, or talking by the above operation, the inter-vehicle distance alarm device 4 is automatically activated. Even if there is an incoming call, or if the driver does not activate the inter-vehicle distance alarm device 4 and the mobile phone enters the communication state, the inter-vehicle distance alarm device 4
Automatically starts the operation, so that when the driver uses the mobile phone, the inter-vehicle distance alarm device 4 is always activated, and the usability can be surely improved.

In this embodiment, the inter-vehicle distance warning device 4 is used as a driving assistance device. However, the invention is not limited to this. Any device that can provide driving assistance in accordance with the surrounding conditions of the vehicle may be used. An auto-cruise system that follows the preceding vehicle, which keeps the distance to the preceding vehicle constant when the preceding vehicle is recognized, and a lane that detects the white line of the driving lane and automatically controls the steering angle so that the vehicle travels along the white line. A keep device or the like can be used.

FIG. 3 is a diagram showing the configuration of the second embodiment of the present invention. The control unit 10 includes a communication state detection unit 11 for detecting a communication state of the mobile phone, a speaker 3, and a constant speed running in accordance with the set speed. Is connected to a preceding vehicle following type automatic cruise device 12 which combines the preceding vehicle following running with the vehicle.

The communication state detection unit 11 is installed on the opposite side of the front passenger seat from the passenger seat, and outputs a communication signal to the control unit 10 when the intensity of the radio wave output from the mobile phone is equal to or higher than a predetermined value. . That is, when a passenger uses the mobile phone in a place other than the driver's seat, the communication signal is not output to the control unit 10.

The preceding vehicle following type auto cruise device 12
An operation switch 13 for starting and releasing the preceding vehicle following type auto cruise device 12 and setting a constant speed traveling speed of the own vehicle;
A laser radar 14 for detecting an inter-vehicle distance, a CCD camera 15 for recognizing a preceding vehicle, a vehicle speed sensor 16 for detecting a traveling speed of the own vehicle, a throttle sensor 17 for detecting an opening degree of a throttle valve, It comprises a throttle actuator 18 for controlling, an automatic transmission controller 19, and an auto cruise control unit 20 which calculates the own vehicle speed according to each detected value and controls the throttle actuator 18 and the automatic transmission controller 19. . The auto cruise control unit 20 is provided with a storage unit 21 for setting a flag.

Two control modes, a normal mode and a communication mode, are set in the auto-cruise system 12 following the preceding vehicle. The normal mode is set and the vehicle speed sensor 1
If the vehicle speed detected in step 6 is equal to or higher than 30 km / h, the following control is performed. First, when the preceding vehicle is not detected or when the traveling speed of the preceding vehicle detected by the laser radar 14 and the CCD camera 15 is higher than the constant speed traveling speed of the own vehicle inputted from the operation switch 13, the constant speed traveling is performed. The throttle actuator 18 and the automatic transmission controller 19 are controlled so that the own vehicle runs at the speed.

If the traveling speed of the preceding vehicle is lower than the constant speed traveling speed of the own vehicle inputted from the operation switch 13, the traveling speed of the preceding vehicle is maintained at the same speed as the preceding vehicle while maintaining a predetermined inter-vehicle distance corresponding to the traveling speed of the preceding vehicle. The throttle actuator 18 and the automatic transmission controller 19 are controlled so that the own vehicle runs.

When the communication mode is set, only the deceleration control in the normal mode is performed. That is, when the preceding vehicle is decelerated and the own vehicle is once decelerated, the vehicle is not automatically accelerated. Note that the preceding vehicle following type auto-cruise device 12 constitutes the driving assistance device of the present invention.

Next, the operation of this embodiment will be described.
When an ignition switch (not shown) is turned on,
The communication state detection unit 11 monitors a radio wave transmitted from the mobile phone.
When the mobile phone placed in the vicinity of the driver's seat is in an outgoing, incoming or talking state, and a radio wave transmitted from the mobile phone is equal to or greater than a predetermined value, the mobile phone outputs a communication signal to the control unit 10.

The operation of the control unit 10 will be described below with reference to the flowchart shown in FIG. In step 201, the flag stored in the storage unit 21 is initialized to 0. In step 202, it is determined whether or not a communication signal has been input from the communication state detection unit 11. If a communication signal has been input, the process proceeds to step 203. If a communication signal has not been input, step 202 is repeated at predetermined time intervals.

In step 203, it is determined whether or not the preceding vehicle following type auto-cruise system 12 is operating. If the preceding vehicle following type auto cruise device 12 is operating,
Proceed to step 204. If the preceding vehicle-following auto-cruise device 12 is not operating, the process proceeds to step 205.

In step 204, 1 is set as a flag in the storage unit 21. In step 205, the driver is notified from the speaker 3 that the auto-cruise system 12 following the preceding vehicle is to be operated in the communication mode. Step 206
Then, the preceding vehicle following type auto-cruise device 12 is operated in the communication mode.

In step 207, the communication state detecting section 11
It is determined whether or not a communication signal has been input from. If a communication signal has been input, step 207 is repeated at predetermined time intervals. If a communication signal has not been input, the process proceeds to step 208. In step 208, it is determined whether 1 is stored in the storage unit 21 as a flag. If the flag is not 1, the process proceeds to step 209. If the flag is 1, the process proceeds to step 211.

At step 209, the driver 3 is informed of the stop of the preceding-vehicle-following auto-cruise system 12 from the speaker 3. In step 210, the preceding vehicle following type auto-cruise device 12 is stopped, and the process returns to step 202. In step 211, the driver is notified from the speaker 3 that the auto-cruise device 12 following the preceding vehicle is to be operated in the normal mode. In step 212, the preceding-vehicle-following auto-cruise system 12 is operated in the normal mode.
In step 213, the flag of the storage unit 21 is set to 0, and the process returns to step 202.

According to the above operation, first, when the portable telephone held by the driver enters the communication state, it is detected that the communication state is established. A communication signal is output, and the preceding vehicle following type auto-cruise device 12 can be prevented from automatically operating in the communication mode.

In the normal mode, the inter-vehicle distance to the preceding vehicle is detected, and the traveling speed is controlled so as to keep the inter-vehicle distance to the preceding vehicle constant. However, the mobile phone enters the communication state and enters the communication mode. In this case, the distance between the vehicle and the preceding vehicle is detected,
If the inter-vehicle distance is less than the predetermined distance, the vehicle will decelerate,
Since the acceleration control is not performed even if the preceding vehicle accelerates, the driver must perform the acceleration control by himself, so that it is possible to prevent the driver from concentrating on the call. Furthermore, since the deceleration control is performed in the same manner as in the normal mode, even when the preceding vehicle decelerates, the inter-vehicle distance to the preceding vehicle does not become less than a predetermined value.

If the preceding vehicle-following type auto-cruise device 12 is operating before the mobile phone enters the communication state, the preceding vehicle-following type auto-cruise device 12 is operated in the communication mode in the communication state, and the communication state is changed. When the mobile phone is terminated, the safety of the mobile phone during use of the vehicle is improved by operating the preceding vehicle following type auto cruise device 12 again in the normal mode, and the communication by the mobile phone is terminated. Can continue the operation of the preceding vehicle following auto cruise device 12 in the normal mode.

In this embodiment, the communication signal is output from the communication state detecting section when the radio wave of the portable telephone placed near the driver's seat changes to the communication state. As a modified example of the above, a communication signal may be output for a predetermined time after receiving a call to a mobile phone other than the vicinity of the driver's seat. If the above communication state detection unit is used,
Even if a call arrives at a mobile phone in the bag placed in the passenger seat, etc., the driver automatically removes the mobile phone from the bag because the preceding vehicle following type auto cruise device automatically operates in the communication mode. Safety at times is improved.

In this embodiment, the preceding vehicle following type auto-cruise device 12 is used as the driving assistance device. However, the present invention is not limited to this. For example, an inter-vehicle which issues an alarm according to the inter-vehicle distance from the preceding vehicle. It is possible to use a distance warning device, a lane keeping device that detects a white line in the traveling lane, and automatically controls the steering angle so as to travel along the white line.

In the inter-vehicle distance warning device, in the normal mode,
The buzzer sounds once when the inter-vehicle distance becomes 40 m or less, and the buzzer sounds continuously when the inter-vehicle distance becomes 30 m or less, and the inter-vehicle distance becomes 80 m or less in the communication mode. When it becomes, the buzzer sounds once, when the inter-vehicle distance becomes 50 m or less, the buzzer sounds intermittently, and when the inter-vehicle distance becomes 40 m or less, the buzzer sounds continuously.

That is, when the mobile phone is in use, the preceding vehicle following type auto-cruise device 12 operates in the communication mode in which the warning is issued at the inter-vehicle distance that is longer than the inter-vehicle distance at which the alarm is issued in the normal mode. The alarm is issued at a longer stage, and the frequency of the alarm is increased, so that it is possible to prevent the user from being excessively concentrated on the call. Further, since a mobile phone is used, a safe inter-vehicle distance can be ensured even if a response to an alarm is delayed.

In this embodiment, the preceding vehicle following type auto-cruise device 12 is used as the driving assist device. However, the present invention is not limited to this. Any driving assist device can be used according to the surrounding conditions of the vehicle. For example, a lane keeping device that detects a white line of a traveling lane and automatically controls a steering angle so as to travel along the white line can be used.

In the lane keeping device, in the normal mode,
The steering angle is automatically controlled so that the vehicle runs along the white line, and the lane keeping control is released when a steering force exceeding a predetermined value is applied to the steering. By controlling the steering angle only when it is likely to occur, in the communication mode, it is basically necessary to operate the steering wheel. You. In the communication mode, since the steering force applied to the steering is smaller than the operation force at which the control is released in the normal mode, the steering control in the normal mode as well as the communication mode is released. Therefore, there is no need to release with a stronger operation force.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a first exemplary embodiment of the present invention.

FIG. 2 is a flowchart illustrating a flow of an operation of a control unit.

FIG. 3 is a block diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 4 is a flowchart illustrating a flow of an operation of a control unit.

[Explanation of symbols]

 1, 10 control unit 2, 11 communication status detection unit 3 speaker 4 inter-vehicle distance alarm device 5, 13 operation switch 6, 14 laser radar 7 alarm unit 8 alarm control unit 12 preceding vehicle following type auto cruise device 15 CCD camera 16 vehicle speed sensor 17 Throttle sensor 18 Throttle actuator 19 Automatic transmission controller 20 Auto cruise control unit 21 Storage unit

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 3D044 AA35 AC03 AC26 AC39 AC51 AC59 AD04 AD17 AE11 AE21 3G093 AA01 AA05 BA04 BA23 CB10 DA06 DB05 DB16 DB18 EA09 EB03 FA06 FB05 5H180 AA01 BB05 CC03 CC04 CC14 CC24 LL04 LL06

Claims (7)

[Claims] 1. A communication state detection unit for detecting a communication state of a mobile communication device placed in a vehicle, a driving assist device for detecting a surrounding state of the vehicle and performing driving assistance according to the surrounding state, and the communication state detection A driving assistance system for a vehicle, comprising: a controller that activates the driving assistance device when the mobile communication device detects that the mobile communication device is in a communication state. 2. A communication mode detecting unit for detecting a communication state of a mobile communication device placed in a vehicle, a normal mode for detecting a surrounding condition of the vehicle and performing driving assistance according to the surrounding condition, or a surrounding mode of the vehicle. A driving assistance device that performs driving assistance in a communication mode in which driving assistance is changed in a direction that increases a driver's consciousness of driving by changing a driving assistance function performed in the normal mode according to a surrounding situation and according to the surroundings; A driving assistance system for a vehicle, comprising: a control unit that activates the driving assistance device in a communication mode when a state detection unit detects that the mobile communication device is in a communication state. 3. If the driving assist device is operating in the normal mode before operating the driving assist device in the communication mode, the control unit is configured to execute the normal mode operation when the operation in the communication mode ends. The vehicle driving assist system according to claim 2, wherein the vehicle is operated again. 4. The driving assistance device is an inter-vehicle distance alarm device that detects a distance between a vehicle and an object existing in front of the vehicle and issues an alarm in accordance with the detected distance. If the distance is equal to or less than a first predetermined value, an alarm corresponding to the distance is issued. In the communication mode, if the distance is equal to or less than a second predetermined value that is larger than the first predetermined value, the distance is set. The vehicle driving assistance system according to claim 2 or 3, wherein an alarm is issued according to the following. 5. The driving assist device is a preceding vehicle-following type auto cruise device that detects an inter-vehicle distance to a preceding vehicle and controls a traveling speed in accordance with the inter-vehicle distance. Detects the distance between vehicles, controls the running speed of the own vehicle so as to keep the distance between the vehicle and the preceding vehicle constant, and detects the distance between the vehicle and the preceding vehicle in the communication mode. 4. The vehicle according to claim 2, wherein the vehicle is decelerated so as to keep the distance between the vehicle and the vehicle constant, and acceleration is not performed.
The driving assistance system for a vehicle according to the above. 6. The communication state detection unit determines whether or not the mobile communication device placed near a driver's seat is in a communication state based on a communication strength, and determines whether the mobile device placed near a driver's seat is in a communication state. 6. The vehicle driving assistance system according to claim 1, wherein when the communication device is in a communication state, the communication device detects the communication state. 7. The communication state detection unit determines whether or not the mobile communication device placed outside the vicinity of the driver's seat is in a call receiving state based on a communication strength. The communication state is detected during a predetermined time regardless of the communication intensity.
The driving assistance system for a vehicle according to 4, 5, or 6.