KR101314774B1 - Control method of vehicle - Google Patents

Abstract

The present invention relates to a control method of a vehicle in which a driver can directly select or change a control target vehicle of an adaptive cruise control system.

To this end, the control method of the vehicle having an adaptive cruise control system according to an embodiment of the present invention comprises the steps of selecting a control target vehicle of the adaptive cruise control system; and selecting a candidate target vehicle of the adaptive cruise control system And changing the candidate target vehicle of the adaptive cruise control system to the control target vehicle by manipulating a turn signal switch provided in the vehicle. It is effective to select or change the controlled vehicle.

Adaptive cruise control system, ACC

Description

CONTROL METHOD OF VEHICLE}

The present invention relates to a control method of a vehicle, and more particularly, to a control method of a vehicle having an adaptive cruise control system (hereinafter also referred to as "ACC").

In general, the adaptive cruise control system adds a regular interval driving function to a conventional cruise control function. The cruise control function means a function of constantly driving the vehicle at a predetermined speed set by the driver without using the accelerator pedal. That is, if the driver sets the cruise control mode by using the cruise control mode key or the like while driving the vehicle at a predetermined speed by using the accelerator pedal, the vehicle may be set to the cruise control mode even if the driver does not use the accelerator pedal. Speak the ability to keep pace.

As such, the cruise control function keeps the vehicle speed constant, thereby providing the convenience that the driver can drive the vehicle at a desired speed without using the acceleration and deceleration pedals. However, when the vehicle is driven in the cruise control mode, the vehicle maintains a constant speed regardless of the presence of the vehicle ahead, which may cause a traffic accident.

The Adaptive Cruise Control is proposed to prevent this problem.

In detail, the adaptive cruise control system is a system that detects a front object by using a front sensor such as a camera, and automatically controls the longitudinal behavior of the control vehicle accordingly. Such a system can reduce the stress on the driver's repetitive tasks such as acceleration, deceleration and stopping required to maintain a proper distance from the vehicle ahead when driving on the road. In addition, by automatically driving the control vehicle at a predetermined speed and automatically decelerating or accelerating according to the movement of the front object, there is an advantage that the traffic flow can be smoothly improved with the improvement of the fuel efficiency of the vehicle.

However, in the conventional cruise control system (Adaptive Cruise Control), the driver's judgment and the detection information of the front sensor may be different so that the driver may feel different from the operation of the ACC, and the adaptive cruise control system (Adaptive Cruise Control) There is a problem that the driver does not directly specify the vehicle to be controlled.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a control method of a vehicle in which a driver can directly select or change a control target vehicle of an adaptive cruise control system.

A control method of a vehicle according to an embodiment of the present invention for achieving the above object is a control method of a vehicle having an adaptive cruise control system, selecting a control target vehicle of the adaptive cruise control system; and the Selecting a candidate target vehicle of the adaptive cruise control system; and changing the candidate target vehicle of the adaptive cruise control system to a control target vehicle by manipulating a direction light control switch provided in the vehicle. .

Selecting a control target vehicle of the adaptive cruise control system; It is preferable to select a vehicle in front of the vehicle as the control target vehicle.

Selecting a candidate target vehicle of the adaptive cruise control system; selecting a vehicle in a lane different from the lane in which the control target vehicle is located as the candidate target vehicle, and selecting at least one vehicle as the candidate target vehicle.

Preferably, the control target vehicle and the candidate target vehicle are displayed on the head up display so as to be distinguished from each other.

Preferably, the control target vehicle is indicated by a solid line on the head up display, and the candidate target vehicle is indicated by a dotted line on the head up display so as to be distinguished from each other.

When the candidate target vehicle is changed to the control target vehicle by the operation of the direction indicator light operation switch, it is preferable that the vehicle that has been the control target vehicle is changed to the candidate target vehicle.

As described in detail above, according to an embodiment of the present invention, the user can directly select or change the control target vehicle of the adaptive cruise control system by directly operating a turn signal switch.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

1 is a control block diagram of a vehicle having an adaptive cruise control system according to an embodiment of the present invention.

As shown in FIG. 1, the vehicle has an ACC operation mode setting key 10 capable of switching from the normal driving mode to the adaptive cruise control mode, and a front sensor for sensing a relative speed and a relative distance of another vehicle in front of the vehicle. (11), the camera sensor 12 which knows the kind of the target object existing in front of the vehicle, the vehicle speed sensor 13 which detects the traveling speed of the vehicle, and the direction indicator of the vehicle can be turned on / off Direction indicator light operation switch 14, a lane extractor 15 for processing a captured image signal to determine a lane, an electronic control unit 16 for controlling the overall control of the system, and an electronic control brake 17 for braking a vehicle ), An electronic control throttle 18 for controlling the driving speed of the vehicle, and a head-up display for displaying information on the front window of the vehicle so as to interface the control state of the vehicle with the driver. "la Also it may include a box, 19).

 The ACC operation mode setting key 10 is a switch for switching the driving mode of the vehicle from the normal driving mode to the adaptive cruise control mode (ACC), and the driver accelerates the vehicle to the desired speed by pressing the accelerator pedal (not shown). After inputting the ACC operation mode setting key 10, the vehicle is controlled to maintain the speed of the vehicle at the traveling speed when the ACC operation mode setting key 10 is turned on, but depending on the distance to the controlled vehicle ahead. The driving speed set by the user is raised or lowered.

The front sensor 11 detects the relative speed and the relative distance of the vehicle existing in front of the vehicle and transmits it to the electronic controller 16. In addition, the front sensor 11 may be mounted at least one inside the shock-absorbing bumper mounted on the front of the vehicle, and generates an ultrasonic wave to receive a signal that is reflected back from the object located at a predetermined distance and return The relative distance and the relative speed of can be detected. On the other hand, the front sensor 11 is preferably transmitting and receiving ultrasonic signals, it is also possible to apply the transmission and reception of infrared or other high-frequency.

The camera sensor 12 may be installed toward the front of the inside of the vehicle so as to reduce air resistance and not affect the lens by rain, snow, dust, etc., so as to photograph the front of the vehicle, and transmit the information to the electronic controller 16. By transmitting, it is possible to know the type of the object in front of the vehicle detected by the front sensor (11).

The vehicle speed sensor 13 detects the traveling speed of the vehicle and transmits the information to the electronic control unit 16. There are various types according to the measurement method. A typical example is a reed switch type sensor. A reed switch type sensor is installed near a magnet rotor and rotates the magnet rotor to change the direction of the magnetic flux passing through the reed switch. Will be.

The direction indicator operation switch 14 is a switch capable of turning on / off the direction indicator of a vehicle. In the present invention, the control target vehicle of the adaptive cruise control system can be changed by the operation of the direction indicator operation switch 14. That is, in the present invention, when the driving mode of the vehicle is set to the adaptive cruise control mode (ACC), the control target vehicle and the candidate target vehicle are displayed through the head-up display 19, and when the direction indicator operation switch 14 is operated, The vehicle selected as the candidate vehicle may be changed to the controlled vehicle. Specifically, when the direction indicator light operation switch 14 is lowered, the vehicle on the left side of the current control target vehicle is changed to the control target vehicle, and when the direction indicator light operation switch 14 is raised upward, the vehicle is located on the right side of the current control target vehicle. The vehicle is changed to the vehicle to be controlled.

The lane extractor 15 extracts a lane existing in front of the vehicle. When the signal captured by the camera sensor 12 is applied to the lane extractor 15, the lane extractor 15 changes the brightness from the captured image. The lane candidates are determined based on the measurement result of, the histograms of the determined lane candidates are generated, the near lanes are detected from the vehicle, and the curvature is calculated for the far-field candidates located at far distances. Can be recognized. Meanwhile, a method for recognizing a lane is a known technique and is described in detail in Korean Patent Laid-Open Publication No. 2008-0004834.

The electronic controller 16 manages overall control of the adaptive cruise control system. Specifically, when the ACC operation mode setting key 10 is input during driving of the vehicle, the relative speed and relative distance information of the object in front of the vehicle transmitted from the front sensor 11 and the target object input from the camera sensor 12 The information on the type of the control unit is displayed on the head-up display 19 for the control target vehicle and the candidate target vehicle. In addition, the electronic controller 16 controls the vehicle by using the traveling speed as the reference speed when the ACC operation mode setting key 10 is turned on, and increases or decreases the reference speed of the vehicle according to the distance from the control target vehicle in front of the vehicle. Descended. Specifically, the electronic control unit 16 controls the electronic control throttle 18 so as to maintain the traveling speed of the vehicle when the ACC operation mode setting key 10 is turned on in principle, and according to the distance to the control target vehicle, Perform the same operation as

That is, when the ACC operation mode is set, the electronic controller 16 detects the safety distance from the vehicle ahead by using the vehicle speed detected by the vehicle speed sensor 13 and the stop time set by the stop time setting key (not shown). In addition, the front sensor 11 and the camera sensor 12 detects the distance to the front vehicle, that is, the distance between the vehicles. Thereafter, a difference value between the safety distance and the vehicle distance is detected to determine whether the vehicle is within a predetermined allowable range, and the driving speed of the vehicle is adjusted by controlling the electronic control throttle 18 and the electronic control brake 17 according to the result. On the other hand, the ACC operation mode described above is described in detail in Korean Patent Laid-Open No. 2000-0055183.

Meanwhile, when the driving mode of the vehicle is changed to the adaptive cruise control mode, the electronic controller 16 selects the vehicle in front of the vehicle as the control target vehicle, and selects the vehicle in a different lane from the selected control target vehicle as the candidate target vehicle. Selected and displayed through the head-up display 19.

At this time, when the user operates the turn indicator light operation switch 14, the current candidate target vehicle can be changed into the control target vehicle, and the current control target vehicle can be changed into the candidate target vehicle. That is, the control target vehicle of the adaptive cruise control system can be changed by the operation of the direction indicator light operation switch 14.

The electronic control brake 17 may reduce the speed of the vehicle according to the driving of the deceleration pedal (not shown), and the electronic control throttle 18 may control the opening and closing of the vehicle according to the driving of the acceleration pedal (not shown). Can be accelerated.

The head-up display provides image information by creating a virtual image on the windshield of the vehicle, and displays the vehicle's information and driving information through the windshield in front of the vehicle so as not to distract the driver's attention. Device. The head-up display 19 has an image source such as an LCD (Liquid Crystal Display) that generates an image, and images an image generated and projected from such an image source at an appropriate distance and an effective focal length. The optical system and the interface portion for the driver's adjustment can be configured, and the head-up display is described in detail in Korean Patent Publication No. 2008-0007772.

Meanwhile, the head-up display of the present invention serves as a driver interface that allows the driver to select or change the control target vehicle by displaying the target vehicle and the candidate target vehicle of the adaptive cruise control system on the windshield of the vehicle. do.

2 is a view for explaining the selection and modification of the control target vehicle of the adaptive cruise control system according to an embodiment of the present invention.

FIG. 2A shows the target vehicle 20 and the candidate target vehicles 21 and 22 of the adaptive cruise control system in front of the driver with a head-up display device. As shown in FIG. 2 (a), the front vehicle 20 selected as the control target vehicle is indicated by a solid line, and the front left and right vehicles 21 and 22 selected as the candidate target vehicle are indicated by a dotted line. Can be.

FIG. 2 (b) shows the direction indicator operation switch 14. When the direction indicator operation switch 14 is lowered, the vehicle 21 on the front left side, which is the candidate target vehicle in FIG. The vehicle 20, which is the control target vehicle before the change, is changed to the candidate target vehicle. In addition, when the direction indicator light operation switch 14 is raised upward, the vehicle 22 on the front right side, which is the candidate target vehicle in FIG. Changed to a vehicle.

On the other hand, the present invention has been described by limiting the two candidate vehicles, of course, two or more vehicles can be selected as candidate vehicles, of course, by operating the turn signal switch 14 to change the controlled vehicle in sequence Can be.

3 is a control flowchart of an automobile having an adaptive cruise control system according to an embodiment of the present invention.

As shown in FIG. 3, the electronic controller 16 checks whether the ACC operation mode setting key 10 is input by the driver during normal driving of the vehicle, and when it is confirmed that the ACC operation mode setting key 10 is input. The control target vehicle and the candidate target vehicle are selected and displayed on the head-up display 19. That is, the control target vehicle and the candidate target vehicle by combining the relative speed and relative distance information of the object in front of the vehicle transmitted from the front sensor 11 and the information about the type of the target object transmitted from the camera sensor 12. Information on the head up display 19 is displayed. (S10, s20, s30)

Next, when the control target vehicle is selected in the above-described process, when the ACC operation mode setting key 10 is turned on, the electronic control unit 16 controls the vehicle as the reference speed and the control target vehicle in front of the vehicle. The reference speed of the vehicle is raised or lowered according to the distance from the vehicle.

Next, the electronic control unit 16 checks whether the direction indicator operation switch 14 is operated by the driver, and when it is confirmed that the direction indicator operation switch 14 has been operated, changes the controlled vehicle according to the operation direction. That is, when the direction indicator operation switch 14 is lowered, the candidate vehicle on the left side of the controlled vehicle is changed to the control object vehicle, and when the direction indicator operation switch 14 is raised, the candidate object on the right side of the controlled vehicle is controlled. The vehicle is changed to the vehicle under control (s50, s60).

On the other hand, the above-described control flow diagram of FIG. 3 is for explaining the configuration in which the control target vehicle is changed by the operation of the turn indicator light switch 14, and the description of the general ACC operation mode (for example, when the accelerator pedal is pressed, the ACC The change from the operation mode to the normal operation mode) is omitted.

1 is a control block diagram of a vehicle having an adaptive cruise control system according to an embodiment of the present invention;

2 is a view for explaining the selection and modification of the control target vehicle of the adaptive cruise control system according to an embodiment of the present invention;

3 is a control flow diagram of a vehicle having an adaptive cruise control system according to an embodiment of the present invention.

Description of the Related Art [0002]

10: ACC operation mode setting key 11: Front sensor

12: camera sensor 13: vehicle speed sensor

14: direction indicator light operation switch 16: electronic control unit

Claims (6)

In a control method of a vehicle having an adaptive cruise control system, Selecting a control target vehicle of the adaptive cruise control system; Selecting a candidate target vehicle of the adaptive cruise control system; Displaying the control target vehicle and the candidate target vehicle so as to be distinguished from each other on a head-up display; And changing a candidate target vehicle of the adaptive cruise control system to a control target vehicle by operating a turn indicator switch provided in the vehicle. The method of claim 1, Selecting a control target vehicle of the adaptive cruise control system; And a vehicle in front of the vehicle as a control target vehicle. The method of claim 1, Selecting a candidate target vehicle of the adaptive cruise control system; And selecting at least one vehicle as a candidate target vehicle and selecting at least one vehicle as a candidate target vehicle. delete The method of claim 1, And the control target vehicle is indicated by a solid line on the head up display, and the candidate target vehicle is indicated by a dotted line on the head up display so as to be distinguished from each other. The method of claim 1, When the candidate target vehicle is changed to the control target vehicle by the operation of the turn indicator switch, The control method of the vehicle is a vehicle that was previously controlled vehicle is changed to a candidate vehicle.

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