CN118254666A

CN118254666A - Control method of single-cup low-beam rear direct lighting car light

Info

Publication number: CN118254666A
Application number: CN202410395338.5A
Authority: CN
Inventors: 肖雄斌; 蔡向荣
Original assignee: Dongguan Ronghai Photoelectric Technology Co ltd
Current assignee: Dongguan Ronghai Photoelectric Technology Co ltd
Filing date: 2024-04-02
Publication date: 2024-06-28

Abstract

The invention relates to the technical field of control methods of car lamps, in particular to a control method of a single-cup low-beam direct-injection car lamp, which comprises the following steps: by acquiring the external road surface information of the motor vehicle, the distance TD1 between the same-direction vehicle and the motor vehicle, the distance TD2 between the same-direction pedestrian and the motor vehicle and the distance FD between the reverse vehicle and the motor vehicle are calculated according to the external road surface information of the motor vehicle, and the corresponding illumination modes are switched according to the specific values of the distance TD1, the distance TD2 and the distance FD. According to the invention, the lamp is controlled to switch the illumination mode according to the actual scene by the driving illumination rule, so that the lamp illumination work is more intelligent, humanized and standard. The driving safety of the motor vehicle is ensured, the influence of the car lamps on the same-direction or reverse-direction vehicles and the same-direction pedestrians is obviously reduced, and the traveling risk is reduced.

Description

Control method of single-cup low-beam rear direct lighting car light

Technical Field

The invention relates to the technical field of control methods of car lamps, in particular to a control method of a single-cup low-beam direct-injection car lamp.

Background

The automobile lamp is used as a vital lighting and signal device on an automobile, and has the main functions of providing sufficient lighting for a driver at night or in a low-light environment, and simultaneously transmitting the running state and intention of the vehicle to other road users, so that the road safety is ensured to be smooth.

However, some drivers have the phenomenon of using the car lights out of specification during driving, especially misuse of the high beam, which brings great potential safety hazards to vehicles and pedestrians on the road surface, so that the risk of going out is obviously increased, and therefore, the improvement is needed.

Disclosure of Invention

The invention aims to provide a control method of a direct lighting car lamp after a single cup of low beam, aiming at the defects of the prior art. Specifically, the lamp is self-adjusted to illuminate with the luminance L according to the change of the external ambient luminance. The brightness of the car lamp can be adjusted in real time, so that the car lamp is convenient to cope with changes of different time and weather environments, and the driving safety is improved.

By acquiring the external road surface information of the motor vehicle, the distance TD1 between the same-direction vehicle and the motor vehicle, the distance TD2 between the same-direction pedestrian and the motor vehicle and the distance FD between the reverse vehicle and the motor vehicle are calculated according to the external road surface information of the motor vehicle, and the corresponding illumination modes are switched according to the specific values of the distance TD1, the distance TD2 and the distance FD. The car lamp is switched to the illumination mode according to the actual scene by the driving illumination rule, so that the car lamp illumination work is more intelligent, humanized and standard. The driving safety of the motor vehicle is ensured, the influence of the car lamps on the same-direction or reverse-direction vehicles and the same-direction pedestrians is obviously reduced, and the traveling risk is reduced.

The method comprises the steps of obtaining an external road surface image of a motor vehicle, and then extracting driving environment characteristics corresponding to a preset database from the road surface image for comparison, so that the driving environment of the motor vehicle is judged; and then controlling the car lamp to illuminate for the running environment according to a preset running environment rule. The car lamp and the car lamp can switch the illumination mode according to the actual running environment, so that the car lamp illumination work is more intelligent.

The method comprises the steps of obtaining the head rotation angle of a driver and the rotation angle of a steering wheel in a motor vehicle, and judging the driving direction according to the head rotation angle of the driver and the rotation angle of the steering wheel and comparison with a preset action database; and then controlling the car lamp to illuminate according to the driving direction according to a preset driving warning rule. The lamp lighting work is more intelligent, and the operation of a driver is reduced.

In order to achieve the above object, the control method of the single-cup low beam direct lighting car lamp of the present invention is used for night driving illumination, wherein the night driving illumination comprises a high beam illumination mode, a low beam illumination mode, a meeting illumination mode and a turning illumination mode, and comprises the following steps:

S1, acquiring the external environment brightness of a motor vehicle, matching the expected illumination brightness L of a vehicle lamp according to the external environment brightness of the motor vehicle, and adjusting the illumination brightness of the night driving illumination of the vehicle lamp in real time according to the expected illumination brightness L of the vehicle lamp;

S2, obtaining external road surface information of the motor vehicle, calculating a vehicle distance TD1 between the same-direction vehicle and the motor vehicle, a distance TD2 between the same-direction pedestrian and the motor vehicle and a vehicle distance FD between the reverse vehicle and the motor vehicle according to the external road surface information of the motor vehicle, and switching corresponding illumination modes according to specific numerical values of the vehicle distance TD1, the distance TD2 and the vehicle distance FD;

s3, obtaining an external road surface image of the motor vehicle, and then extracting the corresponding driving environment characteristics from the road surface image and comparing the driving environment characteristics with the driving environment characteristics in a preset database, so as to judge the driving environment of the motor vehicle; controlling the car lamp to illuminate for the running environment according to a preset running environment rule;

S4, acquiring the head rotation angle of a driver and the rotation angle of a steering wheel in the motor vehicle, and judging the driving direction according to the head rotation angle of the driver and the rotation angle of the steering wheel and comparison with a preset action database; and then controlling the car lamp to illuminate according to the driving direction according to a preset driving warning rule.

Preferably, a high beam illumination distance L1, a low beam illumination distance L2, and a meeting illumination distance L3 are provided, wherein L1, L2, and L3 are set according to the type, model, characteristics of the lamp, etc. of the actual vehicle; l1 > L2 > L3;

the driving lighting rule of the embodiment includes:

A. when the vehicle distance TD1 is less than or equal to L1, controlling the vehicle lamp to illuminate in a low beam illumination mode; when the vehicle distance TD1 is larger than L1, controlling the vehicle lamp to illuminate in a high beam illumination mode;

B. When the distance TD2 is less than or equal to L2, controlling the car lamp to illuminate in a meeting illumination mode; when the distance TD2 is larger than L2, controlling the car lamp to illuminate in a low beam illumination mode;

C. When the vehicle distance FD is less than or equal to L1, controlling the vehicle lamp to illuminate in a vehicle meeting illumination mode; when the vehicle distance FD is greater than L1, controlling the vehicle lamp to illuminate in a high beam illumination mode;

when the analysis result shows that a plurality of illumination modes exist simultaneously, the priority of the meeting illumination mode is higher than the priority of the low beam illumination mode and the priority of the high beam illumination mode.

Preferably, the driving environment rule includes city streets and highways,

Driving environment rules include, but are not limited to, urban streets and highways;

If the driving environment is urban streets, controlling the car lamps to illuminate in a low beam illumination mode when the car distance TD1 is more than L1 or when the car distance FD is more than L1;

If the traveling environment is a highway, the vehicle lamp is controlled to illuminate in a high beam illumination mode when the vehicle distance TD1> L1.

Preferably, the driving direction is divided into lane change and turning,

When the head rotation angle of the driver in the motor vehicle is 3-5 degrees, the rotation angle of the steering wheel is 5-50 degrees, and the head rotation posture of the driver is kept for more than 2 seconds, and the driver is judged to be changed;

when the head rotation angle of the driver in the motor vehicle is larger than 6 degrees, the rotation angle of the steering wheel is larger than 60 degrees, and the head rotation posture of the driver is kept for more than 3 seconds, and the driver is judged to turn;

The driving warning rule comprises:

When the driving direction is changed into the lane, the lighting mode of the current car lamp is recorded, after the car lamp is controlled to enter the turning lighting mode, the time is 1 second, and then the car lamp is controlled to enter the high beam lighting mode of the turning lighting mode, so that the process is repeated until the steering wheel of the motor vehicle returns to the normal position, lane changing is completed, and after lane changing is completed, the car lamp is restored to the lighting mode of the car lamp recorded previously for lighting;

When the driving direction is turning, the lighting mode of the current car lamp is recorded, the car lamp is controlled to enter the turning lighting mode until the steering wheel of the motor vehicle is righted, turning is completed, and the car lamp is restored to the lighting mode of the car lamp recorded previously for lighting after the turning is completed.

Preferably, the car light comprises a car light unit, a detection unit and an information processing unit;

a detection unit for acquiring the ambient brightness outside the motor vehicle,

Used for acquiring the road surface information outside the night driving illumination motor vehicle,

Used for acquiring the images of the outer pavement of the motor vehicle,

For obtaining the rotation angle of the head of the driver, the rotation angle of the steering wheel,

An information processing unit for analyzing the ambient brightness outside the motor vehicle to calculate the expected brightness L of the lamp illumination and generating a control signal for sending to the lamp unit,

The method is used for analyzing road surface information outside the night driving illumination motor vehicle to calculate the vehicle distance TD1 between the same-direction vehicle and the motor vehicle, the distance TD2 between the same-direction pedestrian and the motor vehicle and the vehicle distance FD between the reverse vehicle and the motor vehicle, and generating control signals according to a preset driving illumination rule and sending the control signals to the lamp unit,

The method is used for an external road surface image of the motor vehicle, the driving environment characteristics corresponding to the preset database are extracted from the road surface image for comparison analysis, so that the driving environment of the motor vehicle is judged, a control signal is generated according to the preset driving environment rule and sent to the lamp unit,

The method is used for comparing and analyzing the acquired head rotation angle of a driver in the motor vehicle and the rotation angle of a steering wheel with a preset action database, judging the driving direction, generating a control signal according to a preset driving warning rule and sending the control signal to a lamp unit,

The car light unit is used for receiving the control signal and projecting the light beam according to the control signal.

Preferably, the detection unit comprises a millimeter wave radar, an infrared sensor, a brightness sensor, an optical camera and a steering wheel angle sensor;

the detection unit works as follows:

acquiring the relative positions and the relative speeds of the same-direction vehicles, the same-direction pedestrians and the opposite vehicles on the outer pavement of the motor vehicle through millimeter wave radar; the millimeter wave radar emits signals, the millimeter wave signals can reflect signals back to be received by the millimeter wave radar after encountering vehicles in the same direction, pedestrians in the same direction and vehicles in the opposite direction on the outer road surface of the motor vehicle, and according to the time difference delta t between the emitted signals and the received signals, the millimeter wave signals are matched with the light speed c,

According to the formula d= (c deltat)/2,

Respectively calculating the vehicle distance TD1 between the same-direction vehicle and the motor vehicle, the distance TD2 between the same-direction pedestrian and the motor vehicle, and the vehicle distance FD between the reverse vehicle and the motor vehicle;

Identifying the same-direction vehicles, the same-direction pedestrians and the reverse vehicles on the outer pavement of the motor vehicle through the infrared sensor;

Acquiring the ambient brightness outside the motor vehicle through a brightness sensor;

acquiring an external road surface image of the motor vehicle and acquiring the head rotation angle of a driver in the motor vehicle through an optical camera;

the rotation angle of the steering wheel is obtained through a steering wheel angle sensor.

Preferably, the vehicle lamp unit includes a direct high beam light source, a first direct lens, a second direct lens, a third direct lens, a low beam light source, a reflector cup, a switching mechanism, two fourth direct lenses, and two light blocking mechanisms;

The direct high beam light source, the first direct lens, the second direct lens and the third direct lens are sequentially arranged in a collinear manner; the light reflecting cup is arranged between the second direct lens and the third direct lens and is positioned at the upper half part of the third direct lens, and the low beam light source is arranged below the light reflecting cup; the switching mechanism is arranged between the reflecting cup and the third direct lens and is positioned at the lower half part of the third direct lens; the two fourth direct lenses and the two light blocking mechanisms are respectively arranged at two sides of the switching mechanism, and the light blocking mechanisms are arranged between the switching mechanism and the fourth direct lenses;

The low beam light source is electrified to emit low beam light, the low beam light is reflected to the third direct lens through the reflecting cup, the low beam light refracts to illuminate the car lamp in a short distance through the third direct lens, and at the moment, the car lamp is in a low beam illumination mode;

the direct high beam light source is electrified to emit high beam light, the high beam light expands the irradiation angle through the first direct lens and the second direct lens, and the high beam light is refracted by the third direct lens to illuminate the short distance and the long distance of the car lamp, and at the moment, the car lamp is in a high beam illumination mode;

The switching mechanism refracts the light irradiated by the far-reaching light to the lower half part of the third direct lens to the fourth direct lens, and the far-reaching light irradiates the lower half part of the third direct lens and irradiates the two sides of the front part of the car lamp in a short distance through the upper half part of the fourth direct lens to illuminate, and at the moment, the car lamp is in a meeting illumination mode;

The turning illumination mode is divided into a left turn illumination mode and a right turn illumination mode,

The light blocking mechanism on the right side is used for blocking the far-reaching light rays irradiated between the lower half part of the third direct lens and the upper half part of the fourth direct lens in a meeting lighting mode, so that the far-reaching light rays irradiate on the lower half part of the third direct lens and irradiate on the left side of the front part of the car lamp in a short distance through the upper half part of the fourth direct lens on the left side to illuminate, and the car lamp is in a left-turning lighting mode at the moment;

the light blocking mechanism on the left side is used for blocking the far-reaching light rays irradiated between the lower half part of the third direct lens and the upper half part of the fourth direct lens in the meeting lighting mode, so that the far-reaching light rays irradiate on the lower half part of the third direct lens to irradiate to the right side in front of the car lamp in a close range through the upper half part of the fourth direct lens on the right side for lighting, and at the moment, the car lamp is in a right-turning lighting mode.

Preferably, the detection unit further comprises a clock point module and an internet module,

Acquiring real-time through a clock point module;

acquiring local real-time weather information through an internet module;

The calculation formula of the expected brightness L of the car lamp illumination is as follows:

L＝B+(E×K)+W+T，

Calculating the brightness of the direct high beam light source 1 and the low beam light source 5 respectively through a calculation formula of the expected brightness L of the car light illumination;

The basic brightness is B, and the basic brightness B is the basic luminous intensity of the car lamp without external influence; the base luminance B is divided into a base luminance B1 of the direct high beam light source 1 and a base luminance B2 of the low beam light source 5, 20000 candela < B1<80000 candela, b2= (B1 x 1.38) candela:

The ambient brightness is E, and the ambient brightness E is obtained by a brightness sensor;

The adjustment coefficient is K, and the range of the adjustment coefficient K is: 0 to 1;

Weather influence coefficient is W, the range of weather influence coefficient W: -2000 candela to +2000 candela;

The time influence coefficient is T, and the range of the time influence coefficient T is as follows: -2000 candela to +2000 candela.

The invention has the beneficial effects that: according to the invention, the expected illumination brightness L of the lamp is calculated according to the environment brightness outside the motor vehicle by acquiring the environment brightness outside the motor vehicle, and the illumination brightness of the lamp night driving illumination is controlled in real time according to the expected illumination brightness L of the lamp. The brightness of the car lamp can be controlled in real time, so that the car lamp is convenient to cope with changes of different time and weather environments, and the driving safety is improved.

The method comprises the steps of obtaining external road surface information of a motor vehicle, calculating the distances TD1 between the same-direction vehicles and the motor vehicle, the distances TD2 between the same-direction pedestrians and the motor vehicle and the distances FD between the reverse vehicles and the motor vehicle according to the external road surface information of the motor vehicle, comparing and analyzing according to the distances TD1, the distances TD2 and the irradiation distances between the distances FD and a high beam illumination mode or a low beam illumination mode, and controlling the lamps to switch illumination modes according to preset driving illumination rules according to specific conditions of the distances TD1, the distances TD2 and the distances FD. The car lamp is switched to the illumination mode according to the actual scene by the driving illumination rule, so that the car lamp illumination work is more intelligent, humanized and standard. The driving safety of the motor vehicle is ensured, the influence of the car lamps on the same-direction or reverse-direction vehicles and the same-direction pedestrians is obviously reduced, and the traveling risk is reduced.

The method comprises the steps of obtaining an external road surface image of the motor vehicle, extracting corresponding running environment characteristics from the road surface image, comparing the running environment characteristics with the running environment characteristics in a preset database, judging the running environment of the motor vehicle, and controlling the vehicle lamp to illuminate the running environment according to a preset running environment rule. The car lamp and the car lamp can switch the illumination mode according to the actual running environment, so that the car lamp illumination work is more intelligent.

The driving direction is judged by acquiring the head rotation angle of a driver in the motor vehicle and the rotation angle of a steering wheel, comparing the rotation angle of the head of the driver and the rotation angle of the steering wheel with a preset action database, and controlling the car lamp to illuminate according to a preset driving warning rule. The lamp lighting work is more intelligent, and the operation of a driver is reduced.

Drawings

FIG. 1 is a flow chart of a control method of the present invention.

Fig. 2 is a schematic side view of the lamp unit of the present invention.

Fig. 3 is a schematic view of the light path of the low beam illumination mode of the present invention.

Fig. 4 is a schematic view of the optical path of the high beam illumination mode of the present invention.

FIG. 5 is a schematic side view of the light path of the meeting lighting pattern of the present invention.

FIG. 6 is a schematic top view of the light path of the meeting lighting pattern of the present invention.

Fig. 7 is a schematic view of the optical path of the left-turn illumination mode of the present invention.

Fig. 8 is a schematic view of the optical path of the right turn illumination mode of the present invention.

Fig. 9 is a schematic structural view of the lamp unit of the present invention.

The reference numerals include:

1. Direct high beam light source; 2. a first directing lens; 3. a second directing lens; 4. a third directing lens; 5. a low beam light source; 6. a reflective cup; 7. a switching mechanism; 71. a reflecting member; 8. a fourth directing lens; 9. a light blocking mechanism; 91. and a light blocking member.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 9, a control method of a single-cup low beam rear direct lighting vehicular lamp of the present invention is used for night driving lighting including a high beam lighting mode, a low beam lighting mode, a meeting lighting mode, and a turning lighting mode. Wherein the high beam illumination mode is used to increase the visible range; the low beam lighting mode is used for short distance lighting to reduce the influence on surrounding vehicles and pedestrians; the vehicle meeting lighting mode is used for increasing the lighting width range of a short distance, and the turning lighting mode is used for increasing the lighting range at one side of the turning direction.

The method comprises the following steps:

S1, acquiring the ambient brightness outside the motor vehicle, matching the expected illumination brightness L of the lamp according to the ambient brightness outside the motor vehicle, and adjusting the illumination brightness of the night driving illumination of the lamp in real time according to the expected illumination brightness L of the lamp. Specifically, the lamp is self-adjusted to illuminate with the luminance L according to the change of the external ambient luminance. The brightness of the car lamp can be adjusted in real time, so that the car lamp is convenient to cope with changes of different time and weather environments, and the driving safety is improved.

S2, obtaining external road surface information of the motor vehicle, calculating a vehicle distance TD1 between the same-direction vehicle and the motor vehicle, a distance TD2 between the same-direction pedestrian and the motor vehicle and a vehicle distance FD between the reverse vehicle and the motor vehicle according to the external road surface information of the motor vehicle, and switching corresponding illumination modes according to specific numerical values of the vehicle distance TD1, the distance TD2 and the vehicle distance FD. The car lamp is switched to the illumination mode according to the actual scene by the driving illumination rule, so that the car lamp illumination work is more intelligent, humanized and standard. The driving safety of the motor vehicle is ensured, the influence of the car lamps on the same-direction or reverse-direction vehicles and the same-direction pedestrians is obviously reduced, and the traveling risk is reduced.

S3, obtaining an external road surface image of the motor vehicle, and then extracting the corresponding driving environment characteristics from the road surface image and comparing the driving environment characteristics with the driving environment characteristics in a preset database, so as to judge the driving environment of the motor vehicle; and then controlling the car lamp to illuminate for the running environment according to a preset running environment rule. The car lamp and the car lamp can switch the illumination mode according to the actual running environment, so that the car lamp illumination work is more intelligent.

S4, acquiring the head rotation angle of a driver and the rotation angle of a steering wheel in the motor vehicle, and judging the driving direction according to the head rotation angle of the driver and the rotation angle of the steering wheel and comparison with a preset action database; and then controlling the car lamp to illuminate according to the driving direction according to a preset driving warning rule. The lamp lighting work is more intelligent, and the operation of a driver is reduced.

Providing a high beam illumination distance L1, a low beam illumination distance L2 and a meeting illumination distance L3, wherein L1, L2 and L3 are set according to the type, model, characteristics of the car lights and the like of an actual car; l1 > L2 > L3.

The driving lighting rule of the embodiment includes:

A. When the vehicle distance TD1 is less than or equal to L1, the vehicle lamp is controlled to illuminate in a low beam illumination mode. When the vehicle distance TD1 is larger than L1, the vehicle lamp is controlled to illuminate in a high beam illumination mode.

B. When the distance TD2 is less than or equal to L2, the car light is controlled to illuminate in a meeting illumination mode. When the distance TD2> L2, the vehicle lamp is controlled to illuminate in a low beam illumination mode.

C. when the vehicle distance FD is less than or equal to L1, the vehicle lamps are controlled to illuminate in a meeting illumination mode. When the vehicle distance FD > L1, the lamp is controlled to illuminate in the high beam illumination mode.

The driving environment rules of the present embodiment include, but are not limited to, urban streets and highways.

If the driving environment is urban street, the lamps are controlled to illuminate in the low beam illumination mode when the vehicle distance TD1> L1 or when the vehicle distance FD > L1. By the low beam illumination mode illumination, the influence on the surrounding vehicle is reduced.

If the traveling environment is a highway, the vehicle lamp is controlled to illuminate in a high beam illumination mode when the vehicle distance TD1> L1. The visible range is increased through the high beam illumination mode, and the driving safety is improved.

The driving directions of the present embodiment are divided into lane change and turning.

When the rotation angle of the head of the driver in the motor vehicle is 3-5 degrees, the rotation angle of the steering wheel is 5-50 degrees, and the rotation posture of the head of the driver is kept for more than 2 seconds, and the lane change is judged.

When the head rotation angle of the driver in the motor vehicle is greater than 6 °, the rotation angle of the steering wheel is greater than 60 °, and the posture of the head rotation of the driver is maintained for 3 seconds or more, it is determined that the vehicle turns.

The driving warning rule of this embodiment includes:

When the driving direction is changed into the lane, the lighting mode of the current car lamp is recorded, after the car lamp is controlled to enter the turning lighting mode, the time is 1 second, and then the car lamp is controlled to enter the turning lighting mode high beam lighting mode, so that the process is repeated until the steering wheel of the motor vehicle returns to the normal position, lane changing is completed, and the car lamp is restored to the lighting mode of the car lamp recorded previously to perform lighting after lane changing is completed. The front vehicle and the lane change side vehicle are both prompted, and the lane change safety of the motor vehicle is improved.

When the driving direction is turning, the lighting mode of the current car lamp is recorded, the car lamp is controlled to enter the turning lighting mode until the steering wheel of the motor vehicle is righted, turning is completed, and the car lamp is restored to the lighting mode of the car lamp recorded previously for lighting after the turning is completed. When the vehicle turns, the illumination range of the side of the vehicle is increased, the visible area is increased, and the safety of the turning of the vehicle is improved.

The car lamp of the embodiment comprises a car lamp unit, a detection unit and an information processing unit.

The detection unit is used for acquiring the environment brightness outside the motor vehicle, acquiring the night driving illumination motor vehicle external road surface information, acquiring the motor vehicle external road surface image, and acquiring the head rotation angle of a driver in the motor vehicle and the rotation angle of a steering wheel.

The information processing unit is used for analyzing the environment brightness outside the motor vehicle to calculate the expected brightness L of the vehicle lamp illumination and generate a control signal to be sent to the vehicle lamp unit, analyzing the road surface information outside the night driving illumination motor vehicle to calculate the distance TD1 between the same-direction vehicle and the motor vehicle, generating the control signal to be sent to the vehicle lamp unit according to the preset driving illumination rule and the distance TD2 between the same-direction pedestrian and the motor vehicle and the distance FD between the opposite vehicle and the motor vehicle, extracting the driving environment characteristic corresponding to the preset database from the road surface image to be compared and analyzed, judging the driving environment of the motor vehicle, generating the control signal to be sent to the vehicle lamp unit according to the preset driving environment rule, comparing the head rotation angle of a driver in the motor vehicle and the rotation angle of a steering wheel with the preset action database, judging the driving direction, and generating the control signal to be sent to the vehicle lamp unit according to the preset driving warning rule.

The detection unit of this embodiment includes millimeter wave radar, infrared sensor, luminance sensor, optical camera and steering wheel angle sensor.

The detection unit works as follows:

According to the formula d= (c Δt)/2, the vehicle distance TD1 between the same-direction vehicle and the motor vehicle, the distance TD2 between the same-direction pedestrian and the motor vehicle, and the vehicle distance FD between the reverse vehicle and the motor vehicle are calculated respectively.

The infrared sensor is used for identifying the same-direction vehicles, the same-direction pedestrians and the opposite-direction vehicles on the outer pavement of the motor vehicle.

Ambient brightness outside the motor vehicle is acquired by a brightness sensor.

And acquiring an external road surface image of the motor vehicle and acquiring the head rotation angle of a driver in the motor vehicle through the optical camera.

As shown in fig. 2 to 9, the vehicle lamp unit of the present embodiment includes a direct high beam light source 1, a first direct lens 2, a second direct lens 3, a third direct lens 4, a low beam light source 5, a reflector cup 6, a switching mechanism 7, two fourth direct lenses 8, and two light blocking mechanisms 9. The first directing lens 2, the second directing lens 3, the third directing lens 4, and the fourth directing lens 8 are all convex lenses.

The direct high beam light source 1, the first direct lens 2, the second direct lens 3 and the third direct lens 4 are sequentially arranged in a collinear way, so that the direct high beam light source 1 is arranged at the rear part of the car lamp, the problem that the direct high beam light source 1 occupies the upper space of the car lamp is solved, and the inner space of the car lamp is more reasonable.

The reflecting cup 6 is disposed between the second directing lens 3 and the third directing lens 4 and is located at the upper half of the third directing lens 4, and the low beam light source 5 is disposed below the reflecting cup 6.

The switching mechanism 7 is disposed between the reflecting cup 6 and the third direct lens 4 and is located at the lower half of the third direct lens 4. Two fourth direct lenses 8 and two light blocking mechanisms 9 are respectively arranged on two sides of the switching mechanism 7, and the light blocking mechanisms 9 are arranged between the switching mechanism 7 and the fourth direct lenses 8.

When in use, as shown in fig. 3, the low beam light source 5 is powered on to emit low beam light, the low beam light is reflected to the third direct lens 4 through the reflecting cup 6, the low beam light is refracted to illuminate the car lamp in a short distance through the third direct lens 4, and at this time, the car lamp is in a low beam illumination mode.

As shown in fig. 4, the direct high beam light source 1 is energized to emit high beam light, the high beam light is irradiated through the first direct lens 2 and the second direct lens 3 to expand the irradiation angle, and the high beam light is refracted by the third direct lens 4 to illuminate the short-distance and long-distance of the vehicle lamp, and at this time, the vehicle lamp is in a high beam illumination mode.

When the switching mechanism 7 avoids the light of the lower half part of the third direct lens 4 irradiated by the high beam, the car light is switched to the high beam illumination. The car lamp can realize the switching between low beam illumination and high beam illumination.

As shown in fig. 5 and 6, the switching mechanism 7 refracts the light beam irradiated by the far-beam light to the lower half of the third direct lens 4 to the fourth direct lens 8, and the far-beam light irradiated by the lower half of the third direct lens 4 irradiates to the two sides of the front side of the lamp in a short distance through the upper half of the fourth direct lens 8 to illuminate, and at this time, the lamp is in a meeting illumination mode. On the one hand, the width range of the short-distance illumination is increased, and on the other hand, the refraction of the high beam light through the upper half part of the third direct lens 4 irradiates on the ground of the short distance of the car lamp to increase the brightness of the short-distance illumination.

The meeting lighting mode avoids the influence of illumination on the remote vehicles and pedestrians and the running safety of the opposite vehicles, and also avoids the influence of the light of the opposite vehicles on the own vehicle. The contradiction that the far-reaching light rays emitted by the direct-reaching high-reaching light source 1 cannot supplement the near-reaching illumination is solved.

Turning illumination modes are classified into a left-turn illumination mode and a right-turn illumination mode. The lighting device is convenient for realizing turning lighting mode lighting of left or right lane changing and left or right turning according to driving directions.

As shown in fig. 7, in the meeting lighting mode, the light blocking mechanism 9 on the right side blocks the far-beam light irradiated between the lower half of the third direct lens 4 and the upper half of the fourth direct lens 8, so that the lower half of the third direct lens 4 irradiates the left side of the lamp through the upper half of the fourth direct lens 8 on the left side to illuminate the front left side in a short distance, and the lighting range on the front left side in a short distance is increased, and at this time, the lamp is in the left turn lighting mode.

As shown in fig. 8, in the vehicle meeting lighting mode, the light blocking mechanism 9 on the left side blocks the far-beam light irradiated between the lower half of the third direct lens 4 and the upper half of the fourth direct lens 8, so that the lower half of the third direct lens 4 irradiates the upper half of the fourth direct lens 8 on the right side to the front right side of the vehicle lamp in a short distance, and the lighting range on the front right side of the short distance is increased, and at this time, the vehicle lamp is in the right turn lighting mode. The left or right light blocking mechanism 9 operates according to the rotation direction of the steering wheel of the vehicle, and causes the turning illumination mode to be linked with the rotation direction of the steering wheel of the vehicle.

As shown in fig. 9, the switching mechanism 7 preferably includes a driver, which may be an electric cylinder or a linear motor, and a reflecting member 71.

When the driver drives the reflecting member 71 to rise or fall, the driver drives the reflecting member 71 to rise, so that the switching mechanism 7 is realized to refract the light irradiated by the far-beam light to the lower half part of the third direct lens 4 to the fourth direct lens 8, and the light irradiated by the far-beam light to the lower half part of the third direct lens 4 is irradiated to the two sides of the short-distance front part of the car lamp through the upper half part of the fourth direct lens 8 to illuminate, so that the car lamp is in a meeting illumination mode.

When the driver drives the reflecting member 71 to descend, the switching mechanism 7 is realized to avoid the light of the far beam irradiated to the lower half part of the third direct lens 4.

Preferably, the light blocking mechanism 9 includes a light blocking member 91 and an actuator for driving the light blocking member 91 to move, and the actuator may be an electric cylinder or a linear motor.

When the actuator stretches out, the light blocking member 91 is driven to move forwards to be close to the fourth direct lens 8, so that the light blocking mechanism 9 blocks the far-reaching light rays irradiated between the lower half part of the third direct lens 4 and the upper half part of the fourth direct lens 8, and the left-turning illumination mode and the right-turning illumination mode are switched.

The detection unit of this embodiment further comprises a clock point module and an internet module,

The real-time is acquired through the clock point module, and the local real-time weather information is acquired through the internet module, so that the calculation of the expected brightness L of the lamp illumination is facilitated.

L＝B+(E×K)+W+T，

The brightness of the direct high beam light source 1 and the low beam light source 5 are calculated by the calculation formula of the expected brightness L of the car light illumination, so that the brightness of the direct high beam light source 1 and the low beam light source 5 can be changed along with time and weather.

The basic brightness is B, and the basic brightness B is the basic luminous intensity of the car lamp without external influence.

The base luminance B is divided into a base luminance B1 of the direct high beam light source 1 and a base luminance B2 of the low beam light source 5, 20000 candela < B1<80000 candela, and B1 may be 20000 candela, 30000 candela, 40000 candela, 50000 candela, 60000 candela, 70000 candela, or 78000 candela. B2 Candela = (B1 x 1.38).

The ambient brightness is E, and the ambient brightness E is obtained by a brightness sensor; the adjustment coefficient is K, and the range of the adjustment coefficient K is: 0. 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 or 1.

The adjustment coefficient K is a factor which changes according to the change of the ambient brightness and is used for adjusting the brightness of the car lamp to adapt to different environments; when the ambient brightness increases, for example, at night when the light is sufficient, the adjustment coefficient K is reduced to reduce the brightness of the car lamp, so that glare to other road users is avoided; in contrast, in a darker environment, the adjustment coefficient K value is increased to improve the brightness of the car lamp and provide a better illumination effect;

Weather influence coefficient is W, the range of weather influence coefficient W: -2000 candela, -1500 candela, -1000 candela, -500 candela, 0 candela, +500 candela, +1000 candela, +1500 candela, or +2000 candela.

The weather influence coefficient W considers the influence of different weather conditions on the brightness of the car lamp; for example, weather such as rain, snow, fog, etc. may decrease visibility, and thus it is necessary to increase the W value to increase the brightness of the lamp to improve safety; under severe weather conditions, the weather influence coefficient W can be increased, so that the brightness of the car lamp is increased, and a driver is helped to better observe the road and the surrounding environment; in sunny weather, the W value may be smaller or close to 1, so that the influence on the brightness of the car lamp is smaller;

The time influence coefficient is T, and the range of the time influence coefficient T is as follows: -2000 candela, -1500 candela, -1000 candela, -500 candela, 0 candela, +500 candela, +1000 candela, +1500 candela, or +2000 candela.

The time influence coefficient T considers the change of the brightness requirement of the car lamp in different time periods, for example, the car lamp needs higher brightness at night to ensure enough illumination, and the time influence coefficient T is increased at night or in dusk time so as to improve the brightness of the car lamp; whereas during daytime the value of T decreases, even 0, because the lamp may not need or only need a lower brightness.

The foregoing is merely exemplary of the present invention, and those skilled in the art should not be considered as limiting the invention, since modifications may be made in the specific embodiments and application scope of the invention in light of the teachings of the present invention.

Claims

1. A method of controlling a single-cup low beam rear direct lighting vehicular lamp for night driving illumination including a high beam illumination mode, a low beam illumination mode, a meeting illumination mode, and a turning illumination mode, comprising the steps of:

2. The control method of a single-cup low beam direct lighting vehicular lamp according to claim 1, wherein a high beam lighting distance L1, a low beam lighting distance L2, and a meeting lighting distance L3 are provided, wherein L1, L2, and L3 are set according to the type, model, characteristics of the vehicular lamp, and the like of an actual vehicle; l1 > L2 > L3;

the driving lighting rule of the embodiment includes:

3. A method of controlling a single-cup low beam direct lighting vehicular lamp as defined in claim 2, wherein the driving environment rules include city streets and highways,

4. A control method of a single-cup low beam direct lighting vehicular lamp as defined in claim 1, wherein the driving direction is divided into lane change and turning,

The driving warning rule comprises:

5. The control method of a single-cup low beam direct lighting vehicular lamp according to claim 1, wherein the vehicular lamp comprises a vehicular lamp unit, a detection unit, and an information processing unit;

Used for acquiring the images of the outer pavement of the motor vehicle,

6. The control method of a single-cup low beam direct lighting vehicular lamp according to claim 5, wherein the detection unit comprises a millimeter wave radar, an infrared sensor, a brightness sensor, an optical camera, and a steering wheel angle sensor;

the detection unit works as follows:

According to the formula d= (c deltat)/2,

7. A control method of a single cup low beam direct lighting car light according to claim 5, characterized in that the car light unit comprises a direct high beam light source (1), a first direct lens (2), a second direct lens (3), a third direct lens (4), a low beam light source (5), a reflector cup (6), a switching mechanism (7), two fourth direct lenses (8) and two light blocking mechanisms (9);

The direct high beam light source (1), the first direct lens (2), the second direct lens (3) and the third direct lens (4) are sequentially arranged in a collinear way; the reflecting cup (6) is arranged between the second direct lens (3) and the third direct lens (4) and is positioned at the upper half part of the third direct lens (4), and the low beam light source (5) is arranged below the reflecting cup (6); the switching mechanism (7) is arranged between the reflecting cup (6) and the third direct lens (4) and is positioned at the lower half part of the third direct lens (4); the two fourth direct lenses (8) and the two light blocking mechanisms (9) are respectively arranged at two sides of the switching mechanism (7), and the light blocking mechanisms (9) are arranged between the switching mechanism (7) and the fourth direct lenses (8);

The low beam light source (5) is electrified to emit low beam light, the low beam light is reflected to the third direct lens (4) through the reflecting cup (6), the low beam light refracts to illuminate the car lamp in a short distance through the third direct lens (4), and at the moment, the car lamp is in a low beam illumination mode;

The direct high beam light source (1) is electrified to emit high beam light, the high beam light expands the irradiation angle through the first direct lens (2) and the second direct lens (3), and the high beam light is refracted by the third direct lens (4) to illuminate the short distance and the long distance of the car lamp, and at the moment, the car lamp is in a high beam illumination mode;

The switching mechanism (7) refracts the light irradiated by the high beam to the lower half part of the third direct lens (4) to the fourth direct lens (8), and the high beam irradiates the lower half part of the third direct lens (4) and irradiates the two sides of the short-distance front part of the car lamp to illuminate through the upper half part of the fourth direct lens (8), and at the moment, the car lamp is in a car meeting illumination mode;

In the vehicle meeting lighting mode, a light blocking mechanism (9) on the right side is used for blocking far-reaching light rays irradiated between the lower half part of the third direct lens (4) and the upper half part of the fourth direct lens (8), so that the lower half part of the third direct lens (4) irradiates to the left side in front of the vehicle lamp in a short distance through the upper half part of the fourth direct lens (8) on the left side to illuminate, and the vehicle lamp is in a left-turning lighting mode;

In the meeting lighting mode, the light blocking mechanism (9) on the left side is used for blocking the far-reaching light rays irradiated between the lower half part of the third direct irradiating lens (4) and the upper half part of the fourth direct irradiating lens (8), so that the far-reaching light rays irradiate on the lower half part of the third direct irradiating lens (4) to irradiate on the right side in front of the car lamp in a close range through the upper half part of the fourth direct irradiating lens (8) on the right side, and the car lamp is in a right-turning lighting mode.

8. The method for controlling a direct light after a single cup of low beam as claimed in claim 6, wherein the detecting unit further comprises a clock point module and an internet module,

Acquiring real-time through a clock point module;

acquiring local real-time weather information through an internet module;

L＝B+(E×K)+W+T，