KR0167916B1 - Headlamp control unit - Google Patents

Abstract

The present invention relates to an intelligent headlight control apparatus and method for automatically detecting the brightness and humidity of the surroundings of the vehicle at night driving and automatically operating the headlamp and the fog lamp. Between a headlight switch for turning the headlights on and off, a speed sensor for detecting the speed of the vehicle, an optical sensor provided at both side portions between the front window of the vehicle body and the bonnet to detect the brightness of the surroundings of the vehicle, and the light sensor Humidity sensor for detecting the humidity around the vehicle, mounted on the headlight angle control step motor for controlling the headlight angle in the up and down direction by dividing the angle of the headlight into several stages, and variable resistor for adjusting the brightness of the headlight And a step motor for adjusting a resistance mounted on the variable resistor to change a contact of the variable resistor, and operation of a headlamp. A first relay installed in a furnace to open and close the operation circuit, a second relay installed in an operation circuit such as a fog lamp, and opening and closing the operation circuit, and receiving a detection signal from the vehicle speed sensor, a humidity sensor, and an optical sensor for angle adjustment. Intelligent headlight control device that automatically controls the operation of the headlight, the angle, the brightness and the fog light, including an electronic control device for controlling the stepper motor and the resistance stepper motor, the first relay and the second relay. To provide.

Description

Intelligent headlight control device and method

1 is a partial plan view of a vehicle showing a state in which a humidity sensor and an optical sensor are mounted between a front window and a bonnet according to the present invention.

2 is a view showing a mounting structure of a step motor for adjusting the angle of the headlight according to the present invention.

3 is a schematic diagram showing a structure for automatically controlling the brightness of the headlamp and on / off of the fog lamp according to the present invention.

4 is an overall block diagram of an intelligent headlight device according to the present invention.

5 is a graph showing the relationship between the speed of the vehicle and the brightness of the headlights.

6 is a graph showing the relationship between the speed of the vehicle and the angle of the headlight and the brightness around the vehicle.

7 is a graph showing the relationship between the brightness of the vehicle surroundings and the change of the headlight by the light sensor.

8 is an operational flowchart of the intelligent headlight device according to the present invention.

* Explanation of symbols for main parts of the drawings

1: light sensor 2: humidity sensor

3: headlight 9: step motor for angle adjustment

10: fog light 11: battery

12 variable resistance 13 first relay

14 resistance step motor 15 driver

16: second relay 17: electronic control device

18: vehicle speed sensor 19: main switch

20: headlight switch

[Field of Invention]

The present invention relates to a headlight of a vehicle for securing a forward view of a vehicle at night driving, and more particularly, an intelligent headlight control device that automatically detects the brightness and humidity of a vehicle at night and automatically operates the headlamp and a fog lamp. And to a method.

[Prior art]

In general, a car's equalizer can be divided into two functions, firstly, a lighting function for clear visual inspection of a target object at night, and then to another car or other road users. It is a signal function for the purpose of informing the driving state of the.

Accordingly, headlights and fog lights are intended for lighting purposes, and turn signals, taillights, and brake lights are intended for signals.

The rear combination lamp among the lighting devices includes a direction indicator light for indicating a moving direction when changing lanes or turning left and right, a backward light for checking an obstacle behind the vehicle and indicating that the vehicle is moving backwards at the rear, and at night It includes a red tail light combined with a braking light to indicate the presence of a car when driving or stopping at a vehicle, and the front combination lamp located at the front of the car also keeps the driver's vision at night when driving. It consists of a headlight that illuminates and a turn signal that tells the front and side vehicles of the direction ahead.

On the other hand, the headlamp is divided into a high beam to illuminate a wide range and a low beam to illuminate a narrow range when driving at night can be operated by a switch provided in the driver's seat as needed.

[Technical problem to be achieved by the present invention]

However, such a conventional headlight structure requires the driver to turn on / off the operation switch of the headlight according to the surrounding environment, for example, when the weather suddenly becomes cloudy or when passing through a long tunnel or the like. If you do not prepare in advance, suddenly dark field of view is embarrassing, and in severe cases, there is a problem that causes an accident, in addition, the driver has to manually control the angle of the headlight and the operation of the fog light as needed. There was discomfort.

Therefore, the present invention has been proposed to solve such a conventional problem, and the headlight and fog light is automatically turned on / off according to the ambient light and humidity conditions while the main switch of the system is turned on by improving the structure of the headlight. In addition, the illuminance of the headlamp is automatically adjusted to provide convenience to the driver and to prevent an accident by automatically securing the driver's forward field at sunset or when passing through a tunnel.

[Configuration and Function of Invention]

In order to achieve the above object, the present invention is a headlight device of a vehicle that is located in the front of the vehicle to secure the front field of view of the driver at night driving, the main switch and the headlight to turn on / off the operation of the entire system on A headlight switch for turning on / off, a speed sensor for detecting the speed of the vehicle, an optical sensor mounted at both side portions between the front window of the vehicle body and the bonnet, and detecting the brightness around the vehicle, and between the light sensor A humidity sensor for detecting humidity around the vehicle, an angle adjustment step motor mounted on the headlamp to control the headlight angle in several stages, and a variable resistor for adjusting the brightness of the headlamp; It is installed in the resistance control step motor mounted on the variable resistor to change the contact of the variable resistor and the operation circuit of the headlamp. A first relay for opening and closing the copper circuit, a second relay installed in an operating circuit such as a fog lamp, and opening / closing the operating circuit, an angle adjusting step motor and a resistor receiving detection signals from the vehicle speed sensor, the humidity sensor and the light sensor. Including an electronic control device for controlling the step motor for adjustment, the first relay and the second relay, and provides an intelligent headlight control device for automatically controlling the operation of the headlight, the angle, the brightness and the fog light.

In addition, the brightness of the headlight is controlled by the electronic control device according to the speed of the vehicle so that the brightness of the headlight increases relatively quickly to about two thirds of the maximum brightness while the vehicle speed increases from 0 to 50km / h, 50km Above / h, it is preferable that the headlight is gradually increased so that the maximum brightness is reached when the speed of the vehicle reaches 100 km / h.

In addition, the adjustment angle of the headlight is divided and adjusted in six stages according to the speed of the vehicle, 1 to 3 of the angle of the six stages to determine the range of the downlight (A), the range from 4 to 6 uplight Even if the speed of the vehicle falls within the range of the high beam by dividing (B), if the light detection degree by the optical sensor is determined that the street light is turned on around the vehicle or another vehicle approaches from the front of the vehicle, the range of the low beam When the angle of the headlight is adjusted, and the signal detected from the light sensor is determined that there is no light around the vehicle, the angle of the headlight is preferably adjusted in the range of A and B according to the speed of the vehicle. Do.

In addition, it is preferable that the headlight is multiplied by a weighting factor of 1 to 2 by the brightness when the headlight is first turned on automatically according to the brightness of the surroundings of the vehicle by the light sensor to determine the brightness of the headlight.

A first step of confirming whether the headlight switch installed in the driving line is turned on; a second step of checking whether the main switch of the system is turned on when the headlight switch is turned on; and a front of the vehicle body if the main switch is turned on A third step of reading the value of the installed optical sensor, a fourth step of determining whether the brightness around the vehicle is equal to or less than an operating reference value L _on of the headlamp by the value read from the light sensor, and from the light sensor If it is determined that the detected brightness of the surroundings of the vehicle is less than or equal to the operation reference value of the headlamp, a fifth step of turning the headlights on, and a humidity sensor installed in front of the vehicle together with the light sensor to detect humidity around the vehicle. a seventh step, the value detected by the humidity sensor and the step 6 determines whether the reference value of the abnormal operation fog light (W _std), and the s If it is determined to be greater than or equal to the value detected by the sensor operating threshold value of the fog light (W _std) and an eighth step of converting the fog lamp in the on state, and a ninth step of detecting a vehicle speed from a speed sensor of the vehicle, the headlight by the vehicle speed And an eleventh step of adjusting the angle and an eleventh step of adjusting the brightness of the headlamp according to the ambient brightness of the vehicle detected by the vehicle speed and the light sensor.

In addition, when the headlight switch is turned off in the first step, the state is returned to the initial state, and when the main switch of the system is turned off in the second step, the twelfth step of manually operating the headlight is performed. If the brightness of the surroundings of the vehicle detected by the light sensor in step 4 exceeds the reference value, the initial state is returned. If the detected value from the humidity sensor is less than the reference value of the fog lamp in the seventh step, the ninth step is performed. It is desirable to be.

EXAMPLE

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

1 shows a state in which a humidity sensor and an optical sensor are mounted between the front window and the bonnet according to the present invention, and FIG. 2 shows the mounting structure of the step motor for adjusting the angle of the headlamp according to the present invention. 3 is a schematic diagram showing a structure for automatically controlling the brightness of the headlamp and on / off of the fog lamp according to the present invention, FIG. 4 is a block diagram of the intelligent headlamp apparatus according to the present invention, and FIG. Figure 6 is a graph showing the relationship between the speed of the vehicle and the brightness of the headlight, Figure 6 is a graph showing the relationship between the speed of the vehicle, the angle of the headlight and the brightness around the vehicle, and FIG. It is a graph showing the relationship with the change of the headlight, and FIG. 8 is an operation flowchart of the intelligent headlight device according to the present invention.

First, according to the present invention, as shown in FIG. 1, one optical sensor 1 is disposed at each side surface between the front window of the vehicle body and the bonnet so as to sense the light intensity around the vehicle. In the middle of the (1) the humidity sensor (2) is mounted to detect the humidity around the vehicle.

In addition, FIG. 2 shows a structure for automatically adjusting the angle of the headlamp 3 according to the present invention. As shown, the lower portion of the body 4 of the headlamp 3 installed in front of the vehicle body is horizontal. A shaft 5 is formed to be penetrated and fixed to the body 4. One end of the shaft 5 is rotatably attached to the vehicle body, and the other end is driven with a drive gear 6. It is fixedly installed. A reduction gear 7 is coupled to a lower end of the drive gear 6, and the reduction gear 7 is installed at the end of the drive shaft 8 of the step motor 9, according to the driving of the step motor 9. To be rotated.

Therefore, when the step motor 9 is driven, the reduction gear 7 provided in the drive shaft 8 and the drive gear 6 engaged therewith are rotated, and eventually the shaft 5 attached to the drive gear 6 is rotated. As a result, the headlamp 3 is moved in the up and down direction, so that the step motor 9 is controlled by an electronic control device provided in the vehicle body, as described later, for angle adjustment.

3 is a schematic view showing a structure for automatically controlling the brightness of the headlight 3 and the on / off of the fog light according to the present invention, the battery 11 as a power source of the headlight 3 and the fog light 10, A variable resistor 12 connected to the headlamp 3 and the battery 11 to adjust the brightness of the headlamp 3, and installed between the variable resistor 12 and the battery 11 and the headlamp 3. A step motor connected to the first relay 13 for opening and closing a circuit, a resistance adjusting motor 15 coupled to the variable resistor 13 to change a contact of the variable resistor 12, and the step motor 14; The driver 15 which drives 14 is comprised, and the 2nd relay 16 which is provided in the circuit formed from the fog light 10 and the battery 11, and controls ON / OFF of the fog light 10 is comprised.

On the other hand, the first relay 13, the second relay 16 and the driver 15 are controlled by the above-described electronic control device 17, the electronic control device 17 from the various sensors mounted on the vehicle body Control these according to the transmitted signal.

4 is an overall block diagram of an intelligent headlight apparatus according to the present invention, and schematically illustrates the relationship between various types of sensors mounted on a vehicle body and an electronic control device. According to the present invention, There is a speed sensor 18 of the vehicle, a humidity sensor 2 and an optical sensor 1 around the vehicle, all of which are connected to the electronic controller 17 to electronically detect the detected data. Transfer to control unit 17. In addition, the electronic control device 17 is connected to the main switch 19 for turning on / off the operation of the entire system and the headlight switch 20 for turning the headlight on / off. Accordingly, when the main switch 19 and the headlight switch 20 of the entire system are both turned on, the electronic controller 17 may store data from the various types of sensors 1, 2, and 18 with preset reference values. By controlling the step motor 9 for adjusting the angle, the step motor 14 for adjusting the resistance, the first relay 13 and the second relay 16 in comparison, the operation of the headlamp 3, the angle, the brightness and the fog light 10 You can automatically control the operation of. In addition, according to the present invention, when the main switch 19 is off, it is a manual adjustment state as in the conventional method, in which the on / off and angle, brightness, angle, etc. of the headlamp 3 are manually operated. Will be.

Next, with reference to FIGS. 5-7, the control reference of the electronic control apparatus 17 by the data transmitted from the said various types of sensors 1, 2, and 18 is demonstrated.

5 is a graph showing the relationship between the speed of the vehicle and the brightness of the headlight. In general, the brightness of the headlight 3 is increased in consideration of the narrowing of the driver's field of view as the speed of the vehicle increases. _max represents the maximum brightness of the headlight (3), L _min represents the minimum brightness of the headlight (3), L ₅₀ represents the headlight brightness at a vehicle speed of 50 km / h, and the headlight (3) brightness at this time In the formula, L ₅₀ = L _min + (L _max − L _min ) × 2/3. Therefore, according to this graph, while the vehicle speed increases from 0 to 50 km / h, the brightness of the headlight 3 increases relatively rapidly to about 2/3 of the maximum brightness, and above 50 km / h, the brightness of the headlight 3 is increased. Slowly increasing, when the speed of the vehicle reaches 100 km / h, the maximum brightness is reached.

Next, FIG. 6 is a graph showing the relationship between the speed of the vehicle, the angle of the headlamp and the brightness of the surroundings of the vehicle. According to the present invention, the adjustment angle of the headlamp 3 may be divided and adjusted in several stages. In the embodiment, the headlamp 3 divided into six angles θ ₀ to θ ₅ is shown. In the, by adjusting the angle of the headlight (3) according to the invention is less than the vehicle speed is 20km / h at 0, depending on the speed of the vehicle and the angle of the headlight (3) as θ _0, 20, as shown in the figure 50km / θ ₁ for less than h, θ _{2 for} less than 50 to 80 km / h, θ _{3 for} less than 80 to 100 km / h, θ _{4 for} less than 100 to 150 km / h, and θ ₅ for greater than 150 km / h. Among the six angles, the angles θ ₀ to θ ₂ are defined as the downlight range A, and the ranges from θ ₃ to θ ₅ are divided into the upward beam B so that the light may be at least 80 km / h. If the degree of illumination detection by the sensor 1 is determined that the street light is turned on around the vehicle or that another vehicle is approaching from the front of the vehicle, no further angle is increased at θ ₂ so that the range of A according to the speed of the vehicle is determined. To adjust the angle of the headlight (3). In addition, when the signal detected from the optical sensor 1 is determined that there is no light around the vehicle, the angle of the headlamp 3 is adjusted in the range of A and B depending on the vehicle.

Seventh also has a graph showing the relationship between the change of the vehicle surrounding brightness and the headlights of by an optical sensor is illustrated, in this graph that the lateral axis represents the brightness of the peripheral vehicle, L _on is the intelligent headlight device of the present invention When the main switch 19 is turned on, the headlight 3 is automatically operated. The L _limit indicates the range of the headlight 3 when the vehicle speed is 80 km / h or more. It is the reference value to be moved. In addition, the vertical axis is the weighting factor of the headlight 3, and the brightness when the headlight 3 is first turned on is automatically multiplied by the weighting factor of 1 to 2 according to the brightness of the vehicle surroundings by the light sensor 1, and thus the headlights. The brightness of (3) is determined, starting from 1 at L _on and gradually increasing, then rapidly increasing at the middle of L _limit and L _on , and increasing to 2 when the brightness around the vehicle is zero.

In addition, the humidity sensor 2 mounted in front of the vehicle body together with the light sensor 1 allows the fog lamp 10 to operate when the humidity around the vehicle is higher than the reference value W _std . It's time to get stuck or rain.

Finally, FIG. 8 is a flowchart illustrating the operation of the intelligent headlight device according to the present invention. First, a first step of checking whether the headlight switch 20 is turned on, and a case where the headlight switch 20 is turned on A second step of checking whether the main switch 19 is turned on, a third step of reading a value of the light sensor 1 installed in front of the vehicle body when the main switch 19 is turned on, and the light sensor A fourth step of determining whether the brightness of the surroundings of the vehicle is less than or equal to the operating reference value L _on of the headlamp by the value read from (1); A fifth step of turning the headlamp 3 on, and a sixth step of detecting humidity around the vehicle by the humidity sensor 2 installed in front of the vehicle body together with the light sensor 1 if it is determined that Wow A seventh step of determining whether the value detected by the humidity sensor 2 is greater than or equal to the operating reference value W _std of the fog light 10, and the value detected from the humidity sensor 2 is an operating reference value of the fog light 10. (W _std ), the eighth step of switching the fog light 10 to the on state, the ninth step of detecting the vehicle speed from the speed sensor 18 of the vehicle, and the angle of the headlight 3 by the vehicle speed And a eleventh step of adjusting the brightness of the headlamps 3 by the ambient speed of the vehicle detected by the vehicle speed and the light sensor 1.

In addition, when the headlight switch 20 is enlarged in the first step, the initial state is returned. In the second step, when the main switch 19 of the system is turned off, the twelfth step of manually operating the headlight is performed. Will proceed to. When the brightness of the surroundings of the vehicle detected by the light sensor 1 in the fourth step exceeds the reference value, the initial state is returned. In the seventh step, the value detected by the humidity sensor 2 is determined by the fog lamp 10. If it is below the operating threshold, the ninth step is carried out.

[Effects of the Invention]

As described above, according to the intelligent headlight control apparatus and method headlight according to the present invention, not only the operation of the headlight and the fog light is automatically controlled according to the surrounding conditions of the vehicle, but also the angle and the brightness of the headlight are automatically adjusted, There is an effect to improve the convenience and driving stability.

The present invention has been illustrated and described above with respect to certain preferred embodiments, but the present invention is not limited to the above-described embodiments, and the present invention belongs without departing from the spirit of the invention as claimed in the claims. Anyone with ordinary knowledge in the field will be able to make various changes.

Claims (6)

Located in the front of the car, the headlight device of the car that secures the driver's forward field of vision at night, the main switch to turn on / off the operation of the entire system, the headlight switch to turn the headlights on and off, and the speed of the vehicle A speed sensor for detecting, an optical sensor provided at both side portions between the front window of the vehicle body and the bonnet, respectively, for detecting the brightness of the surroundings of the vehicle, a humidity sensor mounted between the optical sensors, for detecting the humidity around the vehicle; An angle adjustment step motor mounted on the headlamp for dividing the angle of the headlamp into several stages to control the headlight up and down; A step motor for resistance adjustment, a first relay installed in an operation circuit of a headlamp, and a first relay for opening and closing the operation circuit; A second relay installed in an operation circuit such as an opening / closing of the operation circuit, an angle adjustment step motor, a resistance adjustment step motor, a first relay, and a second signal received from the vehicle speed sensor, a humidity sensor, and an optical sensor; Intelligent headlight control device including an electronic control device for controlling a relay, to automatically control the operation of the headlight, the angle, the brightness and the fog light. According to claim 1, wherein the brightness of the headlights is controlled by the electronic control device according to the speed of the vehicle so that the brightness of the headlights relatively fast up to about two thirds of the maximum brightness while the speed of the vehicle increases from 0 to 50km / h Intelligent headlight control device, characterized in that the increase in the headlight is more than 50km / h is gradually increased to reach the maximum brightness when the speed of the vehicle reaches 100km / h. According to claim 1, wherein the adjustment angle of the headlight is divided and adjusted in six stages according to the speed of the vehicle, 1 to 3 of the six stages of the angle of the downlight to determine the range (A), from 4 to 6 Even if the vehicle speed is within the range of the high beam by dividing the range into the high beam (B), if the light detection by the optical sensor determines that a street light is turned on around the vehicle or another vehicle approaches from the front of the vehicle, If the angle of the headlight is adjusted in the range of the downlight, and the signal detected from the light sensor is determined that there is no light around the vehicle, the angle of the headlight is determined in the range of A and B depending on the speed of the vehicle. Intelligent headlight control device, characterized in that being adjusted. The method of claim 1, wherein the headlight is multiplied by the weighting factor of 1 to 2 multiplied by the brightness when the headlight is first turned on automatically according to the brightness around the vehicle by the light sensor to determine the brightness of the headlight. Intelligent headlight control device. A first step of checking whether the headlight switch installed in the driver's seat is turned on; a second step of checking whether the main switch of the system is turned on if the headlight switch is turned on; and a front of the vehicle body if the main switch is turned on A third step of reading the value of the light sensor, a fourth step of determining whether the brightness around the vehicle is less than or equal to the operating reference value L _{on the} headlamp by the value read from the light sensor, and the detection from the light sensor If it is determined that the brightness of the surrounding vehicle is less than or equal to the operation reference value of the headlight, a fifth step of turning the headlight on, and a sixth step of detecting humidity around the vehicle by a humidity sensor installed in front of the vehicle together with the light sensor; step and the seventh step of the value detected by the humidity sensor to determine whether the abnormal operation of the reference value fog light (W _std), the s If it is determined to be greater than or equal to the value detected by the sensor operating threshold value of the fog light (W _std) and an eighth step of converting the fog lamp in the on state, and a ninth step of detecting a vehicle speed from a speed sensor of the vehicle, the headlight by the vehicle speed And an eleventh step of adjusting the angle, and an eleventh step of adjusting the brightness of the headlamp according to the ambient brightness of the vehicle detected by the vehicle speed and the light sensor. The method of claim 5, wherein the first stage returns to the initial state when the headlight switch is turned off, and when the main switch of the system is turned off in the second stage, the twelfth step of manually operating the headlight is performed. If the brightness of the surroundings of the vehicle detected by the light sensor in the fourth step exceeds the reference value, it returns to the initial state. Intelligent headlight control method characterized in that the nine steps.