KR20020068850A - apparatus and method of automatically controlling headlights in vehicles - Google Patents

Abstract

PURPOSE: An automatic control apparatus of headlights for a vehicle and a method thereof are provided to turn off and on the headlights automatically in stopping and restarting by using a vehicle wheel sensor or a vehicle speed sensor, and to prevent flickering in traveling at low speed from traffic congestion by regulating lighting speed. CONSTITUTION: An automatic control device for headlights is composed of a vehicle wheel or speed sensor(10) displaying travel speed; a stop signal converting unit(30) outputting a stop signal of a low signal by converting a high signal into the low signal after the first delay time in stopping a vehicle, and a multiplied square wave signal between the multiplication speed and lights-out speed by multiplying the square wave from the vehicle speed sensor; a flickering preventive unit(40) connecting to the stop signal converting unit, and restricting flickering of headlights by smoothening the square wave signal from the stop signal converting unit; and a switching unit(50) connecting headlights to the power according to the output signal from the flickering preventive unit for turning on headlights over the lighting speed and turning off headlights below the lights-out speed. Flickering is prevented in traveling at low speed by regulating lighting speed.

Description

Apparatus and method of automatically controlling headlights in vehicles}

The present invention relates to a vehicle headlight automatic control device and a method thereof, and more particularly, using a wheel sensor or a vehicle speed sensor to control a headlight at a stop state of a vehicle or at a very low speed close to the stop state without a flashing headlight. Automatically turn off the lights, automatically turn on when starting again, and the headlight automatic control device of the vehicle that can adjust the flashing speed so as to prevent the flashing of the headlights when moving slowly at low speed due to congestion It is about.

Conventionally, improvements have been made to automatically perform the selector switch (headlight to lamp selection switch) to automatically turn off the headlights of a vehicle by slowly operating the selector switch when starting again after stopping or stopping. Only turning on / off is practical. Even in this case, there is a problem that the desired control is not often made according to the change in the sensing capability of the illumination sensor caused by dust or the like.

As an example of a conventional automatic headlight control device for a vehicle, a vehicle headlight flasher circuit disclosed in Utility Model Registration No. 0182578 (Registration Date: March 08, 2000, Application No. 1999-0022401) is driven by a car at night. A sensing unit for controlling a headlight by sensing that the sensing unit is configured to detect driving of an automobile wheel and outputting a predetermined signal; An amplifier for inputting and amplifying the output of the detector; A switching unit switched according to the output of the amplifier; And a relay unit for switching a predetermined power output from the battery of the vehicle according to the output of the switching unit to supply the headlamp of the vehicle. The amplifying unit further includes a limiting unit for limiting the input from being larger than a predetermined size while inputting the output of the sensing unit, and a signal delay circuit for delaying the input signal by inputting the output of the limiting unit.

The conventional headlight flasher circuit automatically performs a manual switching operation for turning on and off the headlights when the vehicle restarts slowly after stopping or stopping, but the number of parts and the configuration are complicated. For example, the sensing unit includes a generator for generating a predetermined electricity by being rotated by at least one of the rotation of the wheel of the car, the output of the driving speedometer or the driving totalizer, and further configured to determine the driving and stopping of the vehicle. This becomes complicated, requires amplification part at the time of slow motion, and requires a limiting part at high speed.

In addition, the automatic headlight on / off device and method disclosed in Patent Application Publication No. 2000-0008214 (published: February 07, 2000, application number 1998-0027940), the speed detection unit for detecting the speed of the current vehicle And a microcomputer for controlling the headlight to perform on / off operation at a reference speed up and down according to the speed input from the speed detecting unit, and a control unit for turning the headlight on / off according to the command of the microcomputer. Still, there is a problem that the configuration is complicated and expensive, and the response speed is also slowed because at least the speed data signal must be input from the speed detection unit, the microcomputer follows the complicated flow and the headlight is controlled through the control unit.

In addition, the automobile headlight flasher disclosed in Utility Model Registration No. 0167153 (Registration Date: October 30, 1999, Application No. 1996-38579, Publication No. 1998-0025753) operates the brake from a brake or the like. A timer for inputting a discrimination signal for a predetermined time delay and outputting the output, a level detector for detecting a tilt of the vehicle and outputting a level detection signal, a headlight control by inputting an output signal of the timer and an output signal of the level detector And a voltage supply interrupter connected between the headlight switch and the headlamp and outputting a signal to interrupt the voltage supply to the headlamp according to a headlight control signal output from the controller.

This headlight flasher solves the problem of the ramp in automatically flashing the headlight after a predetermined time delay according to the lighting state of the brake light, and is still prescribed during the operation of the brake according to the driver's habits on the road other than the ramp. The problem that the headlights are turned off when the vehicle is driven even after a time delay remains intact.

Accordingly, the present invention is to solve this problem, by using a wheel sensor or a vehicle speed sensor to automatically turn off the headlight at a very low speed near the stationary state of the vehicle or near the stationary state without flashing the headlight, and at the time of restart It is an object of the present invention to provide a vehicle headlight automatic control device and a method thereof, which can be turned on automatically and that the flashing speed can be adjusted so as to prevent the headlight from blinking at a low speed due to the traffic jam. .

1 is a block diagram showing the configuration of a headlight automatic control apparatus for a vehicle according to the present invention;

2 is a detailed circuit diagram showing the configuration of an automatic headlight control apparatus for a vehicle according to an embodiment of the present invention;

3 is a waveform diagram of a signal input / output to the stop signal switching unit of FIG. 2;

4 is a waveform diagram of an input / output signal of the blink prevention unit of FIG. 2;

Figure 5 is a detailed circuit diagram showing the configuration of the headlight automatic control apparatus for a vehicle according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: wheel sensor or vehicle speed sensor 20: selector switch

30: stop signal switching unit 40: flashing prevention unit

50: switching unit 60: headlight

In order to achieve the above object, a vehicle headlight automatic control apparatus according to an embodiment of the present invention includes a head sensor and a vehicle having a wheel sensor or a vehicle speed sensor for generating a square wave signal for indicating a traveling speed of a vehicle: a wheel When the headlight is turned off by the low signal (high signal) of the sensor or the vehicle speed sensor, the high signal (low signal) is first transmitted when a high signal (low signal) is generated by the wheel sensor or the vehicle speed sensor when the vehicle is stopped. After the delay time, the signal is switched to a low signal (high signal) to output a stop signal of the low signal (high signal), and at a low speed below the same speed (multiplication rate) as the first delay time and the high pulse width of the square wave signal. By multiplying the square wave signal of the wheel sensor or vehicle speed sensor, a square wave signal multiplied between the unequalized speed below the multiplied speed is output, and the spherical wave at a speed greater than the multiplied speed A stop signal switching unit for outputting a wave signal; A flashing prevention unit connected to the stop signal switching unit and preventing the flashing of the headlamp by smoothing a square wave signal input from the stop signal switching unit at an unlit speed; And a switching unit configured to turn on / off the connection of the headlamp to the vehicle's power source in accordance with the output signal from the flashing prevention part so as to turn on the headlight above the lighting speed and turn off the headlight below the lighting speed. It is characterized in that the headlights are automatically turned on and off according to the speed.

The stop signal switching unit includes a signal of a wheel sensor or a vehicle speed sensor of the vehicle as it is input to the input terminal a, and input to the input terminal b after the first delay time through a resistor and a condenser or a TIMMER IC 555. Outputs a multiplied square wave signal having a high signal for the first delay time at the beginning and the end of the high pulse of the wheel sensor or vehicle speed sensor between the multiplication speed and the extinguishing speed, and outputs a high signal at the multiplication speed And an EX-OR gate for outputting a square wave signal at a speed greater than the multiplication speed, wherein the switching unit includes an off mode, an automatic mode (contact point for lighting of a tail light), and a manual mode (a tail light, etc.). Automatic mode on / off to release only the automatic mode of the headlight arbitrarily in the automatic mode of the selector switch, including progressively for manual lighting of the headlight. It is desirable to supply power by connecting the headlamps via the position.

The present invention also provides a method for automatically controlling a headlight of a vehicle for automatically turning on a headlight of a vehicle through a switching unit by receiving a square wave signal from a vehicle wheel sensor or a vehicle speed sensor. Any one of the high signal and the low signal is converted into the other signal between the high signal and the low signal by the stop signal switching unit, and the other signal generated at the stop is output as it is to the wheel sensor or the vehicle speed sensor. It provides a vehicle headlight automatic control method characterized by detecting the stop state by turning off the headlight completely, and furthermore, by multiplying the square wave signal of the wheel sensor or the vehicle speed sensor at low speed, the lighting speed and the light off All vehicles of the vehicle characterized in that the speed, in particular the extinguishing speed is extremely low. Including also provides automatic control method.

In the present invention, when the anti-flashing part is composed of the first resistor, the capacitor and the second resistor, and the switching part is composed of the transistor and the relay, the maximum voltage of the base applied voltage of the transistor is used to supply the driving current of the relay. The minimum voltage of the base applied voltage of the transistor is equal to or greater than the base voltage of the transistor for supplying the holding current of the relay at a speed equal to or higher than the lighting speed that becomes the base voltage, and the minimum voltage of the base applied voltage of the transistor supplies the holding current of the relay. The values of the resistors, capacitors and resistors are determined such that the maximum voltage of the base applied voltage of the transistor is less than the base voltage of the transistor for supplying the driving current of the relay at a speed below the extinguishing speed which becomes the base voltage of the transistor for the transistor. Headlight automatic system of vehicle to assume There is provided a method. In this case, the lighting speed and the extinguishing speed may be adjusted by adjusting the condenser and / or the resistor to be adjustable, or the lighting speed and / or extinguishing speed may be adjusted by making the first resistor, the condenser and / or the second resistance as adjustable. It is desirable to.

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

1 is a block diagram showing the configuration of an automatic headlight control apparatus for a vehicle according to the present invention.

In FIG. 1, the automatic headlight control apparatus for a vehicle according to the present invention includes a headlight 60 and a wheel sensor or a vehicle speed sensor 10 that generates a square wave signal for displaying a traveling speed of the vehicle. In order to use the sensor or the vehicle speed sensor 10 is configured to include a stop signal switching unit 30, flashing prevention unit 40 and the switching unit 50.

The stop signal switching unit 30, when the headlight 60 is turned off by the low signal (high signal) of the wheel sensor or the vehicle speed sensor 10, at the wheel sensor or the vehicle speed sensor 10 when the vehicle is stopped. When the high signal (low signal) is generated, the high signal (low signal) is converted to a low signal (high signal) after the first delay time T1, and is configured to output a stop signal of the low signal (high signal), It is configured to extremely slow down the extinguishing speed (Sof) and prevent flickering between the extinguishing speed (Sof) below the multiplication speed (Sm). To this end, multiplying the square wave signal of the wheel sensor or vehicle speed sensor 10 at a low speed below the same speed (multiplication speed Sm) as the first delay time T1 and the pulse width of the high pulse of the square wave signal. Outputting the square wave signal, and outputting the square wave signal at a speed larger than the multiplication speed Sm.

In FIG. 1, the flashing prevention unit 40 is connected to the stop signal switching unit 30, and smoothes a square wave signal input from the stop signal switching unit 30 at an extinguishing speed (Sof) of the headlamp 60. Configured to prevent flashing.

The switching unit 50 turns on the headlamp 60 at a lighting speed (Son) or higher, and turns off the headlamp 60 at a lighting speed (Sof) or lower according to the output signal from the flashing prevention portion (40). 60 turns on / off the connection to the vehicle power source.

In this configuration, the high signal or the low signal is continuously generated from the wheel sensor or the vehicle speed sensor 10 when the vehicle is stopped in FIG. 1. The other one of the low signal is converted by the stop signal switching unit 30 and output, and the other signal generated when the stop is output as it is to detect the stop state by the wheel sensor or the vehicle speed sensor 10 do. By determining the stop state by the high signal or the low signal which is constantly output as described above, the switching unit 50 can be operated or released by the signal, and the headlamp 60 can be turned off.

Accordingly, the present invention also provides a method for automatically controlling the headlight of a vehicle in which the headlamp 60 is completely turned off by using the above method in addition to the above-described configuration.

Further, during normal driving, the square wave signal of the wheel sensor or the vehicle speed sensor 10 is output from the stop signal switching unit 30, and at the extremely low speed, the ultra low speed is obtained by multiplying the square wave signal of the wheel sensor or the vehicle speed sensor 10. By using the multiplied square wave signal in, as described in detail below, the switching unit 50 can be driven or released at an extremely low speed to make the extinguishing speed Sof extremely low, and the multiplication speed Sm or less It is possible to prevent the flashing of the headlamp 60 between the extinguishing speed (Sof), the present invention, by multiplying in this way, the lighting speed (Son) and the extinguishing speed (Sof), especially the extinguishing speed (Sof) without blinking It also provides a method of extremely low speed.

2 is a detailed circuit diagram of the headlight automatic control apparatus for a vehicle according to an exemplary embodiment of the present invention, and FIGS. 3 and 4 illustrate a signal input / output to the stop signal switching unit 30 of the control apparatus. The waveform diagram and the waveform diagram of the input / output signal of the flashing prevention part 40 of the control apparatus are shown.

In the specific configuration of the stop signal switching unit 30 in Fig. 2, the signal of the wheel sensor or the vehicle speed sensor 10 of the vehicle is input as it is to the input terminal a, the input b via the resistor (R1) and the capacitor (C1) via It is input after the first delay time T1 to start and end the high pulse of the stop signal of the low signal and the square wave signal of the wheel sensor or the vehicle speed sensor 10 between the multiplication speed Sm and the extinguishing speed Sof. Outputs a multiplied square wave signal having a high signal during the first delay time T1, outputs a high signal at the multiplication speed Sm, and outputs a square wave signal at a speed greater than the multiplication speed Sm. It is configured to include an EX-OR gate (EX-OR).

Accordingly, when the vehicle is stopped, a high signal or a low signal is continuously output from the wheel sensor or the vehicle speed sensor 10, and the detection signal of the wheel sensor or the vehicle speed sensor 10 is a resistor R1 and a condenser C1. Regardless of whether the signal is low, the low signal is input to both input terminals of the EX-OR gate (EX-OR), and the low signal is output. When the detection signal of the vehicle speed sensor 10 is the high signal, the initial capacitor (C1) The low signal is input to the b input terminal of the EX-OR gate (EX-OR) during the first delay time T1 charged at The low signal is output to the output terminal of the EX-OR gate (EX-OR), so that the high signal is converted to the low signal and output.

In addition, at high speed TH <T1 in which the pulse width TH of the high pulse of the square sensor of the wheel sensor or vehicle speed sensor 10 is smaller than the primary delay time T1, as shown in FIG. After charging for a time of pulse width (TH), the capacitor C1 discharges to the vehicle speed sensor 10 during the low signal of the square wave signal, and a low signal is applied to the input terminal of the EX-OR gate (EX-OR). Even if the square wave signal is input to the other input terminal is output.

In addition, in FIG. 3, when the pulse width TH of the high pulse of the square wave signal of the wheel sensor or the vehicle speed sensor 10 is the same as the first delay time T1 (TH = T1), 1 is input to the input height b input terminal. The square wave signal signal is input by the difference by the difference delay time T1, and accordingly the high signal is output.

In addition, in the ultralow speed TH> T1 in which the pulse width TH of the high pulse of the square wave signal of the wheel sensor or the vehicle speed sensor 10 is larger than the 1st delay time T1 in FIG. During the time T1, a high signal is input to the first input terminal of the EX-OR gate EX-OR, a low signal is input to the second input terminal, and a high signal is output. However, after the first delay time T1, the EX signal is output. The high signal is input to both input terminals of the -OR gate (EX-OR) so that the low signal is output from the EX-OR gate (EX-OR). In addition, the high signal is output from the EX-OR gate EX-OR similarly to the end of the pulse width TH of the high pulse of the square wave signal of the vehicle speed sensor 10, and the square wave signal is multiplied and output. In the actual design, when the wheel circumference is 180 cm and four pulses are generated from the vehicle speed sensor 10 in one revolution, the vehicle moves at a speed of 45 cm per pulse period (22.5 cm per pulse width). When the primary delay time T1 is 0.329 seconds, the pulse of the square wave of the vehicle speed sensor 10 is multiplied when the vehicle moves at a speed of 22.5 cm or less per pulse width for 0.329 seconds.

Instead of the above-described EX-OR gate EX-OR, a logic circuit equivalent to that of the EX-OR gate EX-OR may be employed, and an equivalent circuit may also be employed for the capacitor C1 and the resistor R1. In FIG. 5, an example of a specific configuration using a delay output TIMMER IC 555 instead of the resistor R1 and the capacitor C1 is illustrated.

Pin 1 of the TIMMER IC 555 is grounded, and power of 5 to 18V is supplied to pin 8. Pin 4 is a reset terminal and is connected to the power supply to prevent noise when not in use. Pin 5 is a terminal to which control voltage is applied, and is grounded by a capacitor of 0.01㎌ to prevent noise when not in use. Pin 6 is a threshold hold terminal and the output goes low when more than 2 / 3Vcc is applied. If pin 2 is the input terminal, pin 3 is the delay output terminal, and voltage less than 1 / 3Vcc is applied to pin 2, the output voltage of pin 3 becomes high. That is, even after the low signal is input, the transistor QI is turned off and the output goes low after being delayed while the capacitor RI becomes a voltage of 2/3 Vcc or more through the resistor RI.

In FIG. 2, the switching unit 50 includes a relay L1 and a relay L1 to which the vehicle power is applied to the c contact, and the headlamp 60 is connected to the a contact so that the headlamp 60 is turned on when it is excited. The relay L1 is energized between the collector and the power supply of the vehicle so as to excite the relay L1 above the driving (deceleration) current of the relay L and to maintain the excitation state of the relay L1 above the holding current IL of the relay L1. ) Is configured to include an NPN transistor Q connected thereto.

In addition, the blink prevention part 40 is a driving current (excitation current) for exciting the relay L1 at the lighting speed Son determined by the drive current of the relay L1 of the said switching part 50 in FIG. The collector current of the transistor Q is maintained at or above and the excitation state holding current IL of the relay L1 is equal to or higher than the extinguishing speed Sof determined by the holding current IL of the relay L1. (R2), condenser C2, and the like, for smoothing the square wave signal from the stop signal switching section 30 to maintain the collector current of the transistor Q above the moat current: about 50% of the touching current. It is comprised including the resistor R3. The diode D1 between the flashing prevention unit 40 and the stop signal switching unit 30 is for preventing reverse discharge to the EX-OR gate (EX-OR) side by the capacitor C2 and the diode D2. Is for absorbing back EMF when the relay L1 is turned on / off.

When the square wave signal is input as shown in FIG. 4 in the flashing prevention part 40, the output signal of the capacitor C2 is, as shown in FIG. 4, the maximum voltage of the drive current of the relay L1. The headlamp 60 is turned on at the lighting speed (Son) determined when the voltage is higher than the voltage for IH, and the minimum voltage is kept above the voltage for the holding current IL of the relay L1. The headlamp 60 is turned on without blinking. After that, it is preferable that the lowest voltage of the capacitor C2 is maintained above the voltage for the holding current IL until the extinguishing speed Soof which is much lower than the lighting speed Son. That is, at the speed at which the maximum voltage VH of the base applied voltage of the transistor Q becomes the base voltage of the transistor Q for supplying the driving current IH of the relay L1, the transistor ( The minimum voltage VL of the base applied voltage of Q) becomes equal to or greater than the base voltage of the transistor Q for supplying the holding current IL of the relay L1, and the minimum voltage of the base applied voltage of the transistor Q ( The maximum voltage VH of the base applied voltage of the transistor Q is lowered at a speed below the extinguishing speed Sof at which VL becomes the base voltage of the transistor Q for supplying the holding current IL of the relay L1. The values of the resistor R2, the capacitor C2, and the resistor R3 are determined to be less than the base voltage of the transistor Q for supplying the driving current IH of the relay L1, so that the headlamp 60 blinks. It will not flash periodically according to this speed.

Further, in order to prevent the lamp from being turned on at the maximum voltage of the capacitor C2 that is once again turned off by the lowest voltage of the capacitor C2 at the extinguishing speed Sof, that is, somewhat near the extinguishing speed Sof. In order to prevent the headlamp 60 from turning off in accordance with the change of the speed of the power supply, the driving current IH of the relay L1 is supplied at the maximum charging voltage much higher than the maximum charging voltage at the extinguishing speed Sof. It is desirable to increase the smoothness. That is, the higher the difference between the lighting speed Son and the extinguishing speed So, it is possible to prevent frequent blinking in the vicinity of the extinguishing speed So while driving. In addition, it is desirable to reduce the extinguishing speed Sof at a speed close to a stop and to increase the lighting speed Son in a traffic situation that requires frequent speed changes in congestion.

As described above, the lighting speed Son and the lighting speed So are the driving current IH of the relay L1, the amplification factor of the holding current IL, and the transistor Q, and the resistance R2. The values of the capacitor C2 and the resistor R3 and the primary delay time T1 of the stop signal switching unit 30 described above are determined. Thus, by changing these values, it is possible to vary the lighting speed Son and / or the extinguishing speed So. In particular, the driver may adjust the lighting speed Son and / or the extinguishing speed Sof according to the traffic jam and the traffic situation when the slow motion is repeated due to congestion. For this purpose, the resistance (R2) can be adjusted by separating the lighting speed (Son) and the lighting speed (Sof). The values of the capacitor C2, the resistor R3, the capacitor C1 and / or the resistor R1 for the primary delay time T1 may be variable. Particularly, even if the speed of extinguishing (Sof) is extremely low, the lighting speed (Son) can be adjusted appropriately only by being able to adjust the speed of lighting (Son), and the headlight (60) is automatically stopped without the inconvenience of flickering and impairing safety. It becomes possible to turn on and off without.

As a specific example, when the driving current IH of the relay L1 is 30 mA, the transistor h _FE = 320, and the holding current IL of the relay L1 is 15 mA, the transistor Q for driving the relay L1 is performed. The base current I _{B of} ) is 0.093 mA (= 30 mA ÷ 320) and the base current I _B of the transistor Q for the moat of the relay L1 is 0.046 mA (= 15 mA ÷ 320). If the output signal of the EX-OR gate (EX-OR) is a square wave signal when the resistor R3 is 56 kV, the capacitor C2 is 10 kV, and the resistor R2 is 33 kV, then the resistor R1 ), And the headlamp 60 is "ON" when the voltage is applied to the capacitor C2 through the diode D1 and the base current I _B of the transistor Q flows 0.093 mA or more. Therefore, the discharge voltage of the capacitor C2 is equal to or greater than 5.8 V by adding the base voltage (about 0.6 V) of the transistor Q to the resistance R3 x base current I _B , that is, 0.093 ma x 56 mA = 5.208 V. In this case, the relay L1 is driven. That is, the relay L1 is driven at the capacitor C2 of about 5.8V, and in a similar manner, the relay L1 is turned off at about 3.225V, and the high pulse width TH of 3T1 when the primary delay time T1 is set to 0.1 second. At the speed with) the headlamp 60 is turned off.

Here, when TC = -t / RC, the current i flowing through the capacitor C2 is Vε ^TC / R, and the voltage Vr across the resistor R3 is Vε ^TC, and is applied to the capacitor C2. The voltage Vc becomes V (1-ε ^TC ). Therefore, if RC = 0.33 (33 (× 10㎌) and V, that is, the EX-OR gate (EX-OR) output voltage is 11.5V, t is 0.23 seconds, that is, the EX-OR gate (EX-OR The headlight 60 is turned on about 0.23 seconds after the high pulse is applied.

On the other hand, if the capacitor C2 is not discharged, the voltage at both ends is up to about 11.5V. However, since the capacitor R2 is discharged through the resistor R3 and the transistor Q, the voltage at both ends of the capacitor C2 is not up to 11.5V. If the vehicle keeps moving, about 9V continues at both ends of the capacitor C2 because high pulses are continuously generated at the output terminal of the EX-OR gate (EX-OR) and discharged continuously through the resistor R3 and the transistor Q. maintain.

When the vehicle is stopped, the capacitor C2 only continues to discharge, so when the base current I _B , which can maintain the relay L1, gradually decreases, the headlight 60 is turned "OFF". It becomes That is, about 0.5 seconds after the vehicle is stopped, the headlights are turned "OFF".

The characteristics charged and discharged in the capacitor C2 are the same as those in the graph of FIG. 4, and specific values are calculated as follows for each section of the X coordinate of FIG. 4.

① Section: Low pulse, no input, only discharge current flows through transistor Q (discharge voltage Vc of capacitor C2 = Vε ^TC ).

② interval, since the high pulse is applied point by discharge by the charging and a transistor (Q) yirueojim at the same time the capacitor (C2) (the charging voltage ^{Vc = V (1-ε TC} ), V = terminal voltage is to be started at 7.5042 [V] 3.9958 After finding the charging voltage of [V] (= 11.5 [V] -7.5042 [V]), add 7.5042 [V] again. In addition, the discharge voltage Vc is Vε ^TC (where V = 7.5042 [V]).

③ Section: Low pulse, so only discharge (discharge voltage (Vc) is Vε ^TC (where V = 8.4354 [V])).

④ section: charging and discharging simultaneously (charge voltage Vc = V (1-ε ^TC ), where V = 11.5-7.7148 = 3.7852 [V])

⑤ Section: Low pulse so discharge only (discharge voltage (Vc) is Vε ^TC ).

⑥ Section: Charging and discharging are performed at the same time (V = 11.5-7.8152 = 3.6848 [V] at charge voltage Vc = V (1-ε ^TC ), V = 7.8152 [V] at discharge voltage Vc = Vε ^TC ).

⑦ Section: Low pulse so discharge only (V = 7.8152 [V] at discharge voltage Vc = Vε ^TC )

When the vehicle moves, pulses are generated by the wheel sensor or the vehicle speed sensor 10, and charging and discharging are simultaneously performed at the high pulse, and only discharge is performed at the low pulse. As the pulse is repeated in FIG. 4, it can be seen that the actual voltage rises slightly.

In addition, in FIG. 2, the switching unit 50 includes a selector switch 20 including an off mode, an automatic mode (contact point for turning on a tail light) and a manual mode (increasingly for manual turning on a tail light and the headlamp 60). Is connected to the headlamp 60 via an automatic mode on / off switch (SW) for arbitrarily releasing only the automatic mode of the headlamp 60.

With this arrangement, the automatic mode (contact point for turning on a taillight), that is, the automatic mode can be set using the selector switch 1 step without a separate automatic switch, and the automatic mode can be turned off if necessary. .

As can be seen from the description of the above-described configuration and operation, the headlight automatic control method of the vehicle of the present invention is one of the high signal and the low signal of the wheel sensor or the vehicle speed sensor 10, the high signal and the low signal. It is possible to detect the stop state by the wheel sensor or the vehicle speed sensor 10 by switching the output signal by the stop signal switching unit 30 to another one of the signals, and outputting the other signal generated at the stop as it is. By using this, in addition to the configuration of the above-described device can be applied to completely turn off the headlamp 60.

In addition, by multiplying the square wave signal of the wheel sensor or the vehicle speed sensor 10 at a low speed, the present invention which makes the lighting speed Son and the light-off speed Sof, especially the light-off speed Sof, extremely low even under the multiplying speed Sm. The automatic control of the headlights of the vehicle may also be applied to other headlight flashing devices in order to reduce the speed of the flashing lights extremely slowly.

In addition, by adjusting the first delay time T1 and the second delay time, the lighting speed (Son) and the lighting speed (Sof) can be adjusted, as well as a sensor for detecting the slip of the wheel to operate the ABS brake. When the signal from the in-wheel sensor is used, the normal vehicle speed sensor 10 outputs four pulses in one wheel, but since 30 to 100 pulses are output, the lighting speed Son and the extinguishing speed Sof, in particular, the extinguishing speed ( It is possible to make Sof much lower.

In addition, by combining with the illumination device by the illumination sensor for turning on / off the required lighting device according to the illumination intensity, it is possible to implement a fully automatic lighting system considering the speed of the vehicle.

According to the configuration and operation of the automatic headlight control device and method of the vehicle according to the embodiment of the present invention described above, using the wheel sensor or the vehicle speed sensor without the flashing of the headlight, the vehicle is stopped or close to the stationary state. The headlights can be turned off automatically at very low speeds and automatically turned on when restarting, and can be applied without changing the electrical wiring of existing vehicles. In this case, the lighting speed can be adjusted to prevent the headlight from blinking.

Claims (9)

In a vehicle having a headlamp 60 and a wheel sensor or a vehicle speed sensor 10 for generating a square wave signal for indicating a traveling speed of the vehicle: When the headlamp 60 is turned off by the low signal (high signal) of the wheel sensor or the vehicle speed sensor 10, when the high signal (low signal) is generated by the wheel sensor or the vehicle speed sensor 10 when the vehicle is stopped. The high signal (low signal) is converted to a low signal (high signal) after the first delay time T1 to output a stop signal of the low signal (high signal), and the first delay time T1 and the square wave signal Multiplying the square wave signal of the wheel sensor or the vehicle speed sensor 10 at a low speed equal to or less than the same pulse width (multiplication speed Sm) of the high pulse to multiply between the multiplication speed Sm or the extinguishing speed Sof A stop signal switching unit 30 for outputting a square wave signal that has been output and outputting a square wave signal at a speed greater than the multiplication speed Sm; It is connected to the stop signal switching unit 30, the flashing prevention unit 40 for preventing the flashing of the headlamp 60 by smoothing the square wave signal input from the stop signal switching unit 30 above the extinguishing speed (Sof) ); And, The headlight 60 is turned on in response to an output signal from the flashing prevention part 40 to turn on the headlamp 60 at a lighting speed (Son) or higher and turn off the headlamp 60 at a lighting speed (Sof) or lower. And a switching unit (50) for turning on / off a connection to a power source, thereby automatically controlling lighting and turning off the headlight according to the traveling speed. The stop signal switching unit 30 of claim 1, wherein the signal of the wheel sensor or the vehicle speed sensor 10 of the vehicle is input as it is to the a input terminal, and the resistor R1 and the capacitor C1 or the TIMMER are input to the b input terminal. The high pulse of the square wave signal of the wheel sensor or the vehicle speed sensor 10 between the stop signal of the low signal and the multiplication speed Sm and the extinguishing speed Sof by being input after the first delay time T1 via the IC 555. Outputs a multiplied square wave signal having a high signal for the first delay time (T1) at the beginning and end of the signal, outputs a high signal at the multiplication speed (Sm), and at a speed greater than the multiplication speed (Sm) An EX-OR gate (EX-OR) for outputting a square wave signal; The switching unit 50 is supplied with power to the c contact so that the headlamp 60 is turned on when it is excited, the relay L1 is connected to the headlamp 60 to the a contact point, and the driving current of the relay L1 ( Relay between the collector and the power supply of the vehicle to excite the relay L1 above the IH (excitation current) and to maintain the excitation state of the relay L1 above the holding current (IL: moat current) of the relay L1. An NPN type transistor Q connecting the L1; The flashing prevention part 40 is equal to or greater than a driving current IH for exciting the relay L1 at a lighting speed Son determined by the driving current IH of the relay L1 of the switching unit 50. Therefore, the collector current of the transistor Q is maintained, and the excitation speed Sof determined by the holding current IL of the relay L1 is higher than the holding current IL of the excited state of the relay L1. And a resistor (R2), a capacitor (C2) and a resistor (R3) for smoothing the square wave signal from the stop signal switching section 30 to maintain the collector current of the transistor Q. Automatic headlight control of the vehicle. The switching unit 50 according to claim 1 or 2, the switching unit 50, the off-mode, automatic mode (contact point for the lighting of the tail lamp, etc.) and manual mode (gradual for manual lighting of the tail lamp and the headlamp 60). In the automatic mode of the selector switch 20 to include, through the automatic mode on / off switch (SW) for arbitrarily releasing only the automatic mode of the headlight 60, characterized in that for connecting the power supply to the power supply Automatic headlight control of a vehicle. In a vehicle having a headlamp 60 and a wheel sensor or a vehicle speed sensor 10 for generating a square wave signal for indicating a traveling speed of the vehicle: The signal of the wheel sensor or the vehicle speed sensor 10 is directly input to the a input terminal, and the b input terminal is input after the first delay time T1 through the series resistor R1 and the condenser C1 in parallel, thereby stopping the vehicle. 1st delay at the beginning and end of the high pulse width TH of the square wave signal of the wheel sensor or the vehicle speed sensor 10 at the stop signal of the signal low signal and the speed between the multiplication speed Sm and the extinguishing speed Sof. Outputs a multiplied square wave signal having a high fill for the time T1, outputs a high signal at the same speed as the multiplication speed Sm, and outputs a square wave signal at a speed greater than the multiplication speed Sm. It is configured to include an EX-OR gate (EX-OR), by configuring the capacitor (C1) and / or the resistor (R1) in a variable type it is possible to adjust the lighting speed (Son) and the extinguishing speed (Sof) Automatic headlight control system for vehicles. In a method for automatically controlling a headlight of a vehicle for receiving a square wave signal from a vehicle wheel sensor or a vehicle speed sensor 10 and automatically turning on the headlight 60 of the vehicle through a switching unit 50: Any one of the high signal and the low signal of the wheel sensor or the vehicle speed sensor 10 is converted into the other signal of the high signal and the low signal by the stop signal switching unit 30 and outputted, and the other signal generated when stopping. Automatically control the headlight of a vehicle by outputting one signal as it is and detecting the stop state by the wheel sensor or the vehicle speed sensor 10 to completely turn off the headlight 60. In a method for automatically controlling a headlight of a vehicle for receiving a square wave signal from a vehicle wheel sensor or a vehicle speed sensor 10 and automatically turning on the headlight 60 of the vehicle through a switching unit 50: A method for automatically controlling the headlight of a vehicle, characterized in that the lighting speed (Son) and the extinguishing speed (Sof) are extremely reduced even under the multiplication speed (Sm) by multiplying a square wave signal of the wheel sensor or the vehicle speed sensor (10) at a low speed. The high pulse width TH and the low pulse width TL receive the same square wave signal from the vehicle wheel sensor or the vehicle speed sensor 10 so as to smooth the square wave signal to prevent the headlamp 60 from blinking. Flashing comprising a resistor R2 and a resistor R3 connected in series to the sensor or vehicle speed sensor 10 and a capacitor C2 connected in parallel between the resistor R2 and the resistor R3. Prevention part 40; And The power is applied to the c contact so that the headlamp 60 is turned on when it is excited, the relay L1 is connected to the a lamp 60 at the contact a, and the relay L1 is above the driving current IH of the relay L1. And an NPN transistor Q for connecting the relay L1 between the collector and the power supply of the vehicle so as to excite and maintain the excitation state of the relay L1 above the holding current IL of the relay L1. In the vehicle headlight automatic control method by the vehicle headlight automatic control device including a switching unit 50 is configured to, Transistor Q at a speed equal to or higher than the lighting speed Son is such that the maximum voltage VH of the base applied voltage of transistor Q becomes the base voltage of transistor Q for supplying drive current IH of relay L1. The minimum voltage VL of the base applied voltage of the transistor is equal to or more than the base voltage of the transistor Q for supplying the holding current IL of the relay L1, and the minimum voltage VL of the base applied voltage of the transistor Q. The maximum voltage VH of the base applied voltage of the transistor Q becomes the relay (at a speed below the extinguishing speed Sof which becomes the base voltage of the transistor Q for supplying the holding current IL of the relay L1). The values of the resistor R2, the capacitor C2 and the resistor R3 are determined so as to be less than the base voltage of the transistor Q for supplying the driving current IH of L1. Control method. 7. The signal according to claim 6, wherein the signal of the wheel sensor or the vehicle speed sensor 10 is input as it is to the input terminal a, and the input terminal b has the first delay time T1 via the series resistor R1 and the capacitor C1 in parallel. The initial input of the high pulse width TH of the square wave signal of the wheel sensor or the vehicle speed sensor 10 at a speed between the low signal stop signal and the multiplication speed Sm and the extinguishing speed Sof when the vehicle is stopped by being input later. Outputs a multiplying square wave signal having a high fill for the first delay time (T1) at the end and the boil, outputs a high signal at the same speed as the multiplying speed (Sm), and is greater than the multiplying speed (Sm). The capacitor C1 and / or resistor R1 by connecting an EX-OR gate (EX-OR) for outputting a square wave signal between the wheel sensor or the vehicle speed sensor 10 and the anti-flashing part 40. To adjust the lighting speed (Son) and the extinguishing speed (Sof) of the variable type How is the headlight automatic control of the vehicle. 8. The resistance according to claim 6 or 7, wherein the resistance value is adjusted so as to adjust the speed value between the lighting speed Son and the lighting off speed Sof according to traffic conditions, and the lighting speed Soon or the lighting speed off. (R2), the condenser (C2) and / or resistance (R3) of the variable control type, characterized in that the vehicle headlight automatic control.