KR20140076192A - Method of controling head light and apparatuse for using the same - Google Patents

Abstract

Disclosed are a method of controlling a headlamp and an apparatus for performing the method. The method of controlling the headlamp comprises the steps of: receiving headlamp control variables; and controlling the operation of the headlamp based on the headlamp control variables, wherein the headlamp control variables are at least one of a vehicle speed, a vehicle location, information of a gyro sensor, traffic information, weather information, and information of radiation intensity. Therefore, the present invention can enhance durability of the headlamp by controlling the headlamp to adapt to driving environment, and enhance stability in driving.

Description

TECHNICAL FIELD [0001] The present invention relates to a headlight control method,

The present invention relates to a headlight control method, and more particularly, to a method and apparatus for controlling a headlight of a vehicle.

The basic principle of the headlight is to take the light from the light bulb into the concave reflector and to make parallel rays to collect the bundle of light in the front and to light it away. Headlights have been used in a variety of headlights, including electric headlights, LED headlights, and HID headlights.

Techniques for controlling headlights in vehicles as well as materials that generate headlights have also made many advances.

Generally, a headlight of a car is used as a main lighting device of a vehicle called a headlight, and is often used to secure a driver's field of view at night when driving at night. The conventional headlights are adjusted only vertically by the driver's operation, or a motor is provided on the rear surface of the headlights, and the right and left steering angles of the headlights are automatically adjusted according to the front direction angles of the vehicle along the traveling direction of the vehicle.

For example, LED headlights have LEDs arranged in a line at the top and four LEDs at the bottom. The LED lamps provided on the upper and lower sides are automatically moved in the vertical direction so that the steering angle can be switched automatically. It also has an adaptive beamforming function that differs depending on the right and left steering direction. In addition, the LED headlight can smoothly and quickly adjust the brightness of the LED to adjust the brightness according to the direction of the light.

The headlight can be the default setting for high beams, but instead of using high beams, you can set up a camera in front to change the high beam pattern to see if there is a car ahead or if the car is approaching. For example, if the other party is present, the brightness of the LED may be adjusted so as to avoid disturbing the other party by illuminating the other party only.

In addition, a variety of technologies are being used to secure the visibility of the operator using headlights.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of controlling the operation of a headlight adaptively when a vehicle is running.

It is still another object of the present invention to provide an apparatus for performing a method of controlling the operation of a headlight adaptively when a vehicle is operated.

According to an aspect of the present invention, there is provided a headlight control method including receiving a headlight control parameter and controlling an operation of the headlight based on the headlight control parameter, The control variable may be at least one of vehicle speed, vehicle position, gyro sensor information, traffic information, weather information, and light amount information. Wherein the step of controlling the operation of the headlamp based on the headlamp control parameter comprises the steps of: determining whether the light amount information is smaller than a threshold value; determining whether the position of the vehicle is a tunnel; Is greater than a threshold value. The headlight control parameter may be a parameter input individually based on the individual driving habit of the operator or a variable calculated based on the headlight operation pattern according to the operating environment of the operator. The headlamp control method may further include setting a beam pattern of the headlamp, and driving the headlamp based on the beam pattern of the set headlamp. The beam pattern of the headlight may be a variable input individually based on the individual driving habits of the operator or a variable calculated based on the headlight beam pattern according to the operating environment of the operator.

According to another aspect of the present invention, there is provided a headlight control apparatus including a headlight control parameter input unit configured to receive a headlight control parameter, a control unit configured to control operation of the headlight based on the headlight control parameter, And the headlamp control parameter may be at least one of a vehicle speed, a vehicle position, gyro sensor information, traffic information, weather information, and light amount information. The headlamp control determination unit may determine whether the light amount information is smaller than a threshold value, determine whether the vehicle position is a tunnel, and determine whether the expected passage time of the tunnel is greater than a threshold value. The headlight control parameter may be a parameter input individually based on the individual driving habit of the operator or a variable calculated based on the headlight operation pattern according to the operating environment of the operator. The headlight control apparatus may further include a beam pattern determination unit configured to set the beam pattern of the headlight and to drive the headlight based on the beam pattern of the set headlight. The beam pattern of the headlight may be a variable input individually based on the individual driving habits of the operator or a variable calculated based on the headlight beam pattern according to the operating environment of the operator.

As described above, according to the headlight control method and the apparatus for performing such a method in the embodiment of the present invention, the control operation of the headlight can be performed according to the headlight control parameters. By using this method, it is possible to control the operation of the headlight and the beam pattern of the headlight in consideration of various situations. Accordingly, it is possible to enhance the durability of the headlamps and to improve the operational stability by controlling the headlamps adaptively to the driving environment.

1 is a flowchart illustrating a headlight control method according to an embodiment of the present invention.
2 is a flowchart illustrating a headlight control method according to an embodiment of the present invention.
3 is a conceptual diagram illustrating a headlight control method according to an embodiment of the present invention.
4 is a flowchart illustrating a method of adjusting a beam pattern of a headlamp according to an embodiment of the present invention.
5 is a conceptual diagram illustrating a headlamp control apparatus according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

In the embodiment of the present invention, a method of controlling a headlight of an automobile by judging a driving environment of the vehicle is disclosed. Various factors can be considered to control the headlights of an automobile. For example, various factors such as vehicle speed, vehicle position, gyro sensor information, traffic information, weather information, and light amount information may be considered as variables for controlling the headlamp. Hereinafter, in the embodiment of the present invention, a method of controlling the headlamps based on respective factors will be briefly described as an example. Information used as a variable for controlling the above headlights can be broadly defined as a headlight control variable. In addition, the headlight control parameters can be used to control the headlights in a complex manner, but for the convenience of explanation, a method of controlling the operation of the headlights according to each headlight control parameter factor is disclosed.

(1) Vehicle speed

The operation of the headlight can be controlled according to the vehicle speed. For example, assuming that the driving environment changes suddenly, such as a tunnel or a bridge, the vehicle can pass relatively quickly in a relatively short period of time than when traveling at a low speed when the vehicle is traveling at high speed.

For example, if the tunnel is short and the moving speed of the vehicle is fast, it may pass through a short tunnel between 1 second and 3 seconds. Even if the headlight is turned on and off in this case, the durability of the headlight is reduced and unnecessary power consumption increases .

In addition, when driving in a rainy environment, the light from the headlights can be reflected through the rainwater. The degree of reflection of the rainwater can vary depending on the speed at which the vehicle travels. That is, the speed of the vehicle may affect whether to use the headlamp and the operation pattern of the headlamp. Therefore, it is necessary to control the headlamp considering the vehicle speed.

(2) Vehicle position

Depending on the location of the vehicle, the orientation or on / off of the headlight of the vehicle can be determined. For example, it is possible to determine whether to light the headlight depending on whether the current position is in a tunnel or under a bridge. As another example, depending on the curvature of the road, the position where the headlight is illuminated can be adjusted when the vehicle performs cornering. That is, it is necessary to determine the operating environment based on the position information of the vehicle at which the vehicle is currently positioned and control the operation of the headlight accordingly.

(3) Gyro sensor

It is possible to perform a headlight operation different from the case in which the vehicle is traveling on a flat road at a certain angle such as a ramp. For example, if the angle of the headlamp is set equal to that of the flat road in the ramp, it may cause more glare to the driver who is running on the opposite side than in the flat road. In the case of a downhill vehicle, the vehicle tends to lean forward by using the brakes for deceleration. In the case of a vehicle that climbs uphill, the weight of the vehicle is shifted backward as the speed increases. Light is reflected in the other vehicle. Accordingly, it is possible to control the operation of the headlight to adjust the angle of the headlight according to the degree of tilt of the vehicle measured using a tilt sensor such as a gyro sensor.

(4) Traffic Information

Traffic information can be information about current traffic situation. For example, various information such as the state of the road on which the current vehicle will enter, the congestion of the vehicle, the position of the tunnel, the curvature of the road, and the like can be used to control the headlights of the vehicle.

(5) Weather information / light quantity information

The headlights can be controlled depending on whether the rain or snow is coming or how much light is sunlight. In the case of rain or snow, the light emitted from the headlamps may be reflected by the rain or snow, causing more glare to the driver than usual. The headlights can be controlled to control this glare. In addition, it is possible to control the operation of the headlight by determining the amount of light outside the headlight in order to increase the headlight and, if the headlight is below a threshold value of a specific light amount, turning on the headlights.

In addition to the headlight control variables described above, various headlight control parameters may be used to control the operation of the headlight. At least one headlamp control variable among the headlamp control parameters described above can be used to control the headlamp.

Hereinafter, a method for controlling a headlamp using at least one of the headlamp control parameters will be described.

1 is a flowchart illustrating a headlight control method according to an embodiment of the present invention.

1 shows a method for controlling a headlight of a vehicle based on traffic information, a vehicle position, and light amount information. 1 is an example of a method for controlling a headlight of a vehicle in consideration of some of headlight control parameters. The headlamp control parameters considered in FIG. 1 may be deleted or other headlamp control variables may be added to control the headlamp, and such embodiments are also included in the scope of the present invention.

Referring to FIG. 1, it is determined whether the light amount is smaller than a threshold value (step S100).

A headlight of a vehicle is basically used in a situation in which the amount of light entering from the outside environment is small and the driver's field of view is not ensured so that the driver's vision can be secured. That is, it is possible to control the operation of the headlight lamp by setting a threshold value of a specific light amount and judging whether the light amount flowing into the current vehicle is smaller than the set threshold value.

 The threshold value of the light amount may be a predetermined value or a variable value set by the operator. The current light amount can be calculated from a sensor provided in the vehicle or information transmitted from the outside.

If the calculated light amount is smaller than the threshold value, it is determined whether the operation of the navigation is normal (step S110).

If the operation of the navigation is impossible because the navigation signal is not received, the power of the headlight can be preferentially turned on (step S120).

If the light amount is smaller than the threshold value and the navigation signal is not received, it is likely to be a dark place such as inside the tunnel, so that the headlight can be turned on based on the light amount information for the sake of safety of the driver.

If the operation of the navigation is normally possible due to the area where the navigation signal is received, it is determined whether the position of the vehicle is a tunnel (step S130).

In the case where the navigation is received, navigation can be used to determine whether the current vehicle is a tunnel or not, in order to obtain accurate vehicle operating environment information. The tunnel can be used to determine whether the headlight control operation is to be performed by using another headlight control parameter as one variable for determining the specific driving environment and the position of the current vehicle.

If the location of the vehicle is a tunnel, it is determined whether the estimated tunnel passage time is longer than a threshold value (step S140).

When the position of the vehicle is a tunnel, it is possible to calculate the tunnel passage expected time based on the speed of the vehicle and the traffic situation information (vehicle traffic information). If the estimated tunnel passing time is longer than the threshold value, the headlamp is turned on (step S150).

Even when passing through the same tunnel, the time taken to pass through the tunnel may be different depending on the current road situation and the vehicle speed. Therefore, it is possible to calculate information on whether to operate the headlight using the time information taken to pass through the tunnel in consideration of such information.

If the calculated tunnel passing time is smaller than the threshold value, the state of the headlamp before passing through the tunnel can be maintained (step S120).

By using the method that does not operate the headlights of the vehicle when the tunnel passing time is short, unnecessary power consumption and reduction of the life span of the headlight can be reduced by making it possible to pass through the tunnel without fastening the headlights of the vehicle unnecessarily when passing through a short tunnel quickly have.

By performing the above-described determination of steps S100 to S160, it is possible to determine whether the headlight is in the previous state (lamp on or off) based on the light quantity, the length of the tunnel when passing through a tunnel (underground roadway), traffic information off, or whether to operate the headlights.

If the location of the vehicle is not a tunnel, it is determined whether or not the time zone during which the vehicle is operated has passed the sunset (step S170). That is, it is possible to judge whether or not the headlight is turned on by judging whether or not the sunset exceeds the light amount. Information related to such a sunset can be transmitted separately on a daily basis from an external network.

If the sunset time has passed, the headlight is turned on (step S160). If the sunset time has not passed, it is further determined whether the weather is blurred at the current position to determine whether the headlight is turned on (step S170).

Step S170 can also be used as a step for controlling the headlight when the light amount does not satisfy the threshold value and the navigation operation is normal (step S115) and the weather is further dim. That is, in the headlight control method according to the embodiment of the present invention, it is determined in a comprehensive manner whether the light amount, the sunset time information, the information about whether the weather to be explained later is blurred or not, .

If it is determined that the weather is cloudy, the headlight can be turned on (step S120).

If it is determined that the weather is not blurred, the headlight can be kept turned off without being controlled.

It is also possible to judge whether or not to control the illumination lamps in a different order in any order in the order of processes for controlling the operation of the headlamp described above. Also, the judgment condition may be changed to a condition for judging another operating environment.

In the case of using the headlight control method as described above, one operation situation can be exemplified. In order to control the headlight, it is possible to judge whether the headlight is operated based on the following information.

(2) the length of the underground driveway is 78 meters (traffic information); (3) the speed of the vehicle is 80km / h (speed of the vehicle, traffic information); (4) Normal operating environment is assumed. In this case, if the current light amount is determined through step S100, tunnel entry is performed, so that the sunlight is blocked due to the tunnel, and the amount of light is reduced. Thus, step S100 is satisfied and step S110 as the next step can be determined. Since the operation of the navigation is normal, step S130 is performed to determine whether the vehicle is located in the tunnel. Since the current vehicle passes through the tunnel, it is determined whether or not the estimated tunnel passing time is longer than the threshold value in the next step (step S140). Based on the length of the underground road, it is judged that it passes through the tunnel within 3 seconds. In this case, the lighting of the vehicle can be set according to the threshold value.

According to another embodiment of the present invention, it is also possible to perform the process of determining whether the headlight is turned on according to the personal setting of the user. For example, in a short tunnel, even if the operator can not distinguish objects in the dark, the headlights need to be turned on even when driving through a short tunnel. Another example is that the driver can control the headlights to be unconditionally turned on for special weather conditions such as rain or fog when the driver has poor visibility, such as when it rains or when it is cloudy.

2 is a flowchart illustrating a headlight control method according to an embodiment of the present invention.

FIG. 2 shows a method for changing the decision priority of a headlight control parameter used by a driver to operate a headlight or for differently determining a headlight control process by an operator performing individual setting.

Referring to FIG. 2, headlight control determination information is input in the headlight control system of the vehicle (step S200).

The headlight control decision information may be control information such as the priority information of the headlight control parameters considering individual driving habits individually set by the operator or may be control information such as specific values of the headlight control parameters which additionally individually select and input . Such headlight control determination information can be input by the operator using an interface such as a GUI provided in the vehicle. Headlight control decision information can also be seen as one of the headlight control variables.

For example, a vehicle operator may have difficulty in securing visibility in a dark operating environment. In this case, the operator can increase the sensitivity of the light intensity sensor for determining the darkness, and even if the light intensity is measured to be larger than the light intensity of the original headlight, the headlight of the vehicle can be turned on before the other person to secure the field of view.

In addition, it is possible to determine whether to turn on the headlight by judging the amount of light so that the headlight is unconditionally operated when the current light amount satisfies the threshold value set in the light amount sensor without judging the other headlight control parameters It can also be set.

Another example is that even if the sunset time is the same, there are more streetlights and surrounding lighting facilities than in the case of highway traffic. Therefore, it is possible to set the time for turning on the headlight relatively when the vehicle is driven in the city.

Further, it is possible to perform control of the headlamp considering personal characteristics by preliminarily inputting individual information considering individual view characteristics according to weather and traffic information.

By using the method of receiving headlight control decision information in advance as described above, the operator can control the headlight in accordance with his / her driving habits.

The headlight control is performed based on the headlight control decision information (step S210).

It is possible to control the headlamp by receiving additional headlamp control parameters in the changed headlamp control process based on the inputted headlamp control decision information. If the priority of the headlight control is changed through step S200, the headlight of the vehicle can be controlled to meet the condition. The headlight of the vehicle can be controlled by using the information that is set in advance by default in the case of the portion that the operator does not set in advance.

The user may perform headlight control based on personal driving habits without inputting personal information to control the headlights. Fig. 3 discloses such a headlight control method.

3 is a conceptual diagram illustrating a headlight control method according to an embodiment of the present invention.

Referring to FIG. 3, the operator collects the record of controlling the headlights (step S300).

When the driver turns on the headlights while driving the vehicle for a certain period of time, the driving environment information at the time of turning on the headlights is stored as one data value and can be used as information for controlling the headlights at a later time.

For example, when the user operates the headlight of a vehicle when the light amount is less than a certain amount of light, the light amount information is stored in the storage device, and the stored amount information can be utilized as information for automatically controlling the headlights in the future. As another example, it is possible to record information on whether or not the user turned on the headlight when a certain time passes a certain time, and automatically control the headlight in advance even if the user does not operate the same way at a certain time, It is possible to control the headlamp of the vehicle based on the headlamp operation record of the existing occupant without inputting the information for controlling the headlamp.

The headlamp control process is newly updated based on the control information for controlling the headlamp of the occupant (step S310).

Based on the control record of the driver's headlights, the operator can derive a specific criterion that the headlight is always on and update the headlight control process accordingly. For example, if a user has a habit of driving a headlight on a rainy day, the headlight control process can be updated to reflect the driving habits so that the headlights can be switched on ahead of other headlamp control parameters on a rainy day .

And controls the headlamps based on the updated headlight control process (step S320).

The updated processing can be used to control the operation of the headlight adaptively according to the driving habits of the operator through step S310.

It is also possible to adjust not only the operation of the headlamp but also the beam pattern of the headlamp, the beam reaching range of the headlamp, and the like.

The headlights can be simply varied in the range in which the headlights are irradiated, such as the high beams and the low beams, and the range in which the headlights reach can be adjusted differently. In addition to this, it is possible to adjust the range and angle of the beam to be scanned depending on whether the road is a curved road or a straight road. In addition, depending on how much the slope of the road on which the vehicle is driven, the angle at which the headlight is irradiated may vary. Such information may also be determined by a previously set headlight control method.

The headlamp beam pattern is defined as a comprehensive term for the method by which the headlamp is irradiated (headlamp irradiation length, angle and range, etc.).

4 is a flowchart illustrating a method of adjusting a beam pattern of a headlamp according to an embodiment of the present invention.

Referring to FIG. 4, information about the headlamp beam pattern is set (step S400).

The beam pattern for the headlamp can be determined by: 1) using the initial value set at the factory in advance, 2) using the value previously input according to the driving situation of the operator, or 3) using the set value based on the driving habit of the driver, Can be set.

For example, the operator can input a beam pattern to be used for each driving situation by using a graphic user interface (GUI). For example, the high beam and the low beam to be used for each weather can be separately set in the headlight. In this case, the headlamp can be set so that the beam pattern moves in a predetermined pattern according to the weather. As another example, the operator can memorize the beam pattern information that sets the headlamp at the time of operation, and set the headlamp to operate with the beam pattern preferred by the user according to the driving environment.

It is possible to use a value set in advance for setting the beam pattern at the time of leaving the vehicle. For example, when driving a curved road when the vehicle is running, the headlamp may be directly irradiated to the driver of the opposite vehicle when the beam pattern is irradiated in a straight line direction. In order to prevent such a situation, the beam pattern can be set differently by controlling the directionality of the headlight to be irradiated according to the driving environment by using information such as the driving direction of the vehicle and the navigation information.

When the headlamp is turned on, the headlamp is operated according to the beam pattern (step S410).

When the headlamp is turned on, the headlamp can be operated in accordance with the driving situation on the basis of the beam pattern set in step S400.

5 is a conceptual diagram illustrating a headlamp control apparatus according to an embodiment of the present invention.

5, the headlamp control parameter input unit 500, the memory 520, the headlamp control determination unit 540, the beam pattern determination unit 560, and the headlamp 580 may be included.

For convenience of description, the above-described components are separately described on the basis of the functions of the components. Each component may be divided into a plurality of components, or each component may be combined to form one component. .

The headlamp control parameter input unit 500 may input various headlamp control parameters for determining whether to control the headlamps, such as the vehicle speed information, the vehicle position information, the gyro sensor information, the traffic information, the weather information, and the light amount information. As an example, these headlight control variables may be used to determine whether to control the headlights, or some of the variables in the above variables may not be judged to control the headlights.

The headlight control parameter input unit 500 can directly receive a set value for the headlight operation from the operator. The operator can set the operation pattern of the headlight and the beam pattern according to his / her driving habit as described above. The headlight control unit 540 controls the headlight in consideration of the input values by receiving these values, so that the headlight can be adaptively operated according to the driving habit of the driver.

The memory 520 may store the headlight usage pattern information used by the operator up to now and may operate the headlights according to the usage pattern information. For example, the headlamp use pattern information may be used to perform a judgment process for performing the control operation of the headlamp in the headlamp control state determination unit 540. [ If the headlamp is not controlled based on the driving record, the memory 520 may not be used.

The headlamp control state determination unit 540 can determine whether to control the headlamp based on the information input from the headlamp control parameter input unit 500. [ For example, as described above, it is possible to determine whether or not to control an elapsed headlight through a predetermined process with parameters such as light amount information, navigation driving information, and driving environment information as one variable.

The process for determining whether to turn on / off the headlight in the headlamp control determination unit 540 may be changed according to the setting of the user, or may be changed according to the operation pattern of the user, rather than a fixed process. By using this method, it is possible to adaptively change the operation of the headlight to match the driving pattern of the operator.

The beam pattern determination unit 560 may set the pattern to be irradiated with the headlights differently according to the driving environment when the control state determination unit 540 determines that the headlights are turned on. As described above, the operation for determining the beam pattern by the beam pattern determination unit 560 may use an automatic pattern value set in advance at the time of shipment of the vehicle, but it is also possible to set the user's setting or the user's operation It is also possible to set differently depending on the pattern.

If the control signal generated as a result of the determination of the headlamp control state determination unit 540 exists, the control signal may be transmitted to the headlamp 580 to determine whether the headlamp is driven based on the control signal.

By using this method, (1) the on / off operation of the headlight is judged organically according to the situation of the vehicle, thereby preventing unnecessary operation of the lamp, thereby increasing the life of the lamp. That is, it is possible to increase the durability of the lamp while ensuring the safety of the passenger by performing the operation of the headlight in a necessary situation.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. It will be possible.

Claims (10)

A method of controlling a headlight of a vehicle,
Receiving a headlight control parameter; And
Controlling the operation of the headlamp based on the headlamp control parameter,
Wherein the headlamp control parameter is at least one of a vehicle speed, a vehicle position, gyro sensor information, traffic information, weather information, and light amount information. 2. The method according to claim 1, wherein controlling the operation of the headlamp based on the headlamp control parameter comprises:
Determining whether the light amount information is smaller than a threshold value;
Determining whether the position of the vehicle is a tunnel; And
And determining whether the expected passage time of the tunnel is greater than a threshold value. 2. The headlight control apparatus according to claim 1,
Wherein the variable is a variable input individually based on a driving habit of a driver or a variable calculated based on a headlight operation pattern according to a driving environment of the driver. The method according to claim 1,
Setting a beam pattern of the headlamp;
And driving the headlamp based on the beam pattern of the set headlamp. 5. The headlamp according to claim 4,
Wherein the headlight beam pattern is a variable individually input on the basis of individual driving habits of the operator or a variable calculated on the basis of the headlight beam pattern according to the driving environment of the operator. A headlight control apparatus of a vehicle,
A headlight control parameter input unit configured to receive a headlight control parameter; And
And a headlight control unit for controlling operation of the headlight based on the headlight control parameter,
Wherein the headlamp control parameter is at least one of a vehicle speed, a vehicle position, gyro sensor information, traffic information, weather information, and light amount information. 7. The headlight control apparatus according to claim 6,
Wherein the controller is configured to determine whether the light amount information is smaller than a threshold value, determine whether the position of the vehicle is a tunnel, and determine whether the estimated passage time of the tunnel is larger than a threshold value. 7. The headlight control apparatus according to claim 6,
Wherein the variable is a variable individually input based on individual driving habits of a driver or a variable calculated based on a headlight operation pattern according to a driving environment of the driver. The method according to claim 6,
And a beam pattern determination unit configured to set the beam pattern of the headlamp and to drive the headlamp based on the beam pattern of the set headlamp. 10. The headlamp according to claim 9,
Wherein the variable is a variable individually input on the basis of individual driving habits of the operator or a variable calculated on the basis of the headlight beam pattern according to the driving environment of the operator.

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