KR910004619B1 - Controlling apparatus for automobile's lights and making method thereof - Google Patents

Abstract

The automatic control system is controlled by the moving conditions and illuminance of environments without the switch operation for the head and tail lamps in running or stopping the vehicle. The system consists of a reset circuit (23) which is connected to a watch dog (24) for detecting the condition of the microcomputer with control (6), a A/D converter circuit (5) which converts the analog signal into the digital signal amplified from the amplification circuit (4) through illuminance sensor (3), and a speed sensor (8). The control section (6) of the microcomputer includes a detecting section (26) for door opening and is connected to a selecting switch (11) and oscillation circuit (12) for the illuminance.

Description

Vehicle light control device and control method

1 is a circuit diagram of a vehicle light control apparatus according to the present invention.

2 is a flow chart for explaining the operation of the vehicle light control apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

1: Ignition switch 2: Ignition switch input conversion circuit

3: illuminance sensor 4: amplification circuit

5: A / D conversion circuit 6: microcomputer control unit

7: microcomputer memory device 8: vehicle speed sensor

9: Door open detection switch 10: Detection input change circuit

11: Illumination sensing amount selection switch 12: Oscillation circuit

13 constant voltage supply power supply circuit 14 unclassified lamp drive output conversion circuit

18: car light switch 19: tail lamp

20: headlight 24: watch dog (WATCH DOG)

23: reset circuit 25: illuminance detection unit

26: vehicle speed and door open phase detection unit state detection unit 27: non-equivalent lamp driving unit

28: headlight driving unit

The present invention relates to a light control device and method for a vehicle, and in particular, a vehicle light control device and a vehicle light control device configured to automatically turn on and off the vehicle headlights and tail lamps according to the ambient light and the driving state of the vehicle when driving or parking It relates to a control method.

Conventional vehicle light control device is a control device between the opposite cars when the lights of the vehicle crosses, or a simple control device that turns off the headlights when the vehicle is stopped and turns on at the time of departure. Safety and reliability issues.

Therefore, the present invention automatically controls the headlights and tail lamps of a vehicle according to the ambient light while driving or the driving condition of the vehicle without manipulating the light switch, and inadvertent or accidents caused by the light switch operation. It is an object of the present invention to provide a vehicle light control apparatus and method that can prevent the risk in advance.

According to one aspect of the present invention, an illuminance sensing unit comprising an illuminance detecting sensor for detecting ambient illuminance change connected to an microcomputer control unit via an A / D change circuit via an amplification circuit, and a microcomputer control unit through a sensing input conversion circuit. A vehicle speed and door open state detection unit comprising a vehicle speed sensor for detecting a vehicle driving state and a door open state detection switch for detecting a door open state connected to a vehicle, and stored in a storage unit in the microcomputer control unit from the light intensity sensor and the vehicle speed sensor. After controlling the measured value compared with the user-selected illuminance value, the illuminance sensing amount selection switch connected to the microcomputer control unit, and the measured value from the illuminance sensing unit and the vehicle speed and door open state sensing unit are stored and controlled. Comparing and controlling the measured value with a value selected from the illuminance detection amount selection switch. An unequipped lamp comprising a microcomputer control unit having a lock, and a base of the unclassified lamp relay driving transistor TR1 connected to a microcomputer control unit via a non-equivalent lamp driving output conversion circuit, the compactor of which is connected to a micro-lamp lamp relay RL1. The driver and the base are connected to the two control terminals of the microcomputer through cascaded NOR gates, these common collectors are connected to the headlight relay RL2, and these common emitters are connected to the headlight lamp relays. And a dimmer padding input detection circuit connected to detect an operation state of the dimmer padding switch 21 and to apply the detected signal to the microcomputer control unit to delay the extinguishing of the headlamp.

According to another feature of the invention, the step of measuring and sensing the ambient light intensity change and the vehicle speed state according to the on operation of the ignition switch, and comparing the measured light intensity value and the running speed state and the illumination sensing amount selection state And controlling the flashing lights of the tail lamp and the headlight according to the comparison state, detecting the dimmer padding switching state according to the ignition switch off operation, and storing the number of switching times to the door opening detection switching state. Accordingly, characterized in that the step consisting of delayed control of the headlight off.

According to the present invention, when the illuminance is greater than 680 Rox, the unilluminated lamp and headlight are controlled out, and when the illuminance is greater than 350 lux, only the unilluminated lamp is controlled out, and when the illuminance is greater than 240 lux, only the headlight is controlled, and the illuminance is If it is greater than 160 lux, it detects the tunnel entry status of the vehicle.If the detected status is the entry status, it controls the tail lamp and headlights and turns off the lights after passing.The detected status is not the tunnel entry status. In this case, after controlling only the tail lamp, the tail lamp and headlight are controlled when the illuminance is less than 40 lux.

In addition, according to the present invention, it is possible to prevent the switching of the headlight lighting state due to the failure or malfunction of the control device, to minimize the battery over-discharge caused by forgetting to turn off the headlights that can occur during parking stop, At the same time, the headlights are automatically turned on and off by distinguishing between normal stops such as emergency stops and signal waits of a driving vehicle.

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

The ignition switch 1 connected to the battery power supply VB of the vehicle is applied to detect the "ON" state. In addition, the output of the ignition switch input conversion circuit 2 is connected to apply a reset signal to the microcomputer control unit 6 through the reset circuit 23, wherein the reset circuit 23 of the microcomputer control unit 6 The watchdog 24 which always detects a normal operating state is connected.

Therefore, when the microcomputer control unit 6 detects the "ON" state of the ignition switch 1, in the illuminance sensor 3 that can measure the change in the illuminance of the illuminance sensor 25 according to the amount of ambient illuminance The signal whose voltage value is changed is amplified by the amplifying circuit 4, and then applied to the A / D converter 5 to convert the analog signal into a digital signal and then applied to the microcomputer control unit 6. On the other hand, the microcomputer control unit 6 is connected to the vehicle speed and door open state detection unit 26, the vehicle speed sensor 8 for detecting the speed of the vehicle and the door open detection switch 9 for detecting the open state of the door. Each signal sensed by the input signal is connected to be input through the sensing input conversion circuit 10. The microcomputer control unit 6 is connected to an illuminance detection amount selection switch 11 and an oscillation circuit 12, respectively.

In this way, the microcomputer control unit 6 calculates the illuminance value according to the signal input from the vehicle speed sensor 8 and stores it in the microcomputer storage device 7, and at the same time calculates the signal period from the vehicle speed sensor 8. Measure your vehicle speed and mileage.

In other words, if there is no illuminance sensor signal by means of storing the ambient illuminance measurement value in the storage device of the control device, it is measured at regular intervals (10ms-100ms) and stored in 10-30 storage devices in sequence. The new measured value is first stored in the memory, the illuminance measured in the first memory is transferred to the second memory, the contents of the second memory are transferred to the third memory, the third is transferred to the fourth and the new illuminance When the measured value is updated and there is a detection signal from the vehicle speed sensor, the illuminance is measured for each detected signal to store and update the illuminance measurement value as described above, and the vehicle speed is the vehicle speed for a predetermined time interval (5ms-2Sec). This is achieved by counting the number of pulses of the sensor signal, calculating the vehicle speed, storing the calculated value in the storage device, and examining the illuminance and the vehicle's driving conditions in the storage device. Lose.

Thus, the microcomputer control unit 6 compares the measured illuminance value with the traveling speed state and the state of the illuminance detection amount selection switch 11 selected by the driver. The comparison-controlled signal is applied to the non-equivalent lamp driving unit 27, and the collector and emitter of the transistor TR1 are applied by applying a signal to the base of the non-equivalent lamp relay driving transistor TR1 through the non-equivalent lamp copper output conversion circuit 14. Since the relay is turned on to operate the relay RL1, the unlit lamp 19 can be controlled.

On the other hand, the control of the flashlight of the headlamp 20 is controlled by a pair of control lines, which constitutes an operative configuration. Referring to the headlight driving unit 28, first of the pair of control terminals of the microcomputer controller 6, the control terminal is controlled. C1 is connected to one input terminal of the NOR gate 16 and the base of the headlight relay driving transistor TR3, respectively.

The control terminal C2 is connected to one input terminal of the NOR gate 15, and the output terminal of the NOR gate 15 is connected to the remaining input terminals of the NOR gate 16, at which the capacitor C is grounded. The other input terminal of the NOR gate 15 is also connected to two common input terminals of the NOR gate 17. Therefore, the output terminal of the NOR gate 17 is connected to the base terminal of the headlight relay driving transistor TR2, and the emitters of the headlight relay driving transistors TR2 and TR3 are connected together with the emitters of the unclassified lamp relay driving transistor TR1 to automatically light. Connected to the switch 18, the collectors of the transistors TR2 and TR3 are connected to each other, connected to the headlight relay RL2, and grounded through the dimmer padding switch 21.

Further, a dimmer padding input sensing circuit 22 is connected from the connection point between the collector side of the transistors TR2 and TR3 and the headlight relay RL2 to connect the sensed dimmer padding input signal to the microcomputer controller 6.

On the other hand, the constant voltage supply power supply circuit 13 is connected between the vehicle battery VB and the microcomputer control unit 6, and the relay RL1 for the tail lamp lamp 19 and the relay RL2 for the headlamp 20 are connected from the vehicle battery VB. have.

Therefore, the lighting operation of the headlamp 20 is controlled from the control terminals C1 and C2 of the microcomputer control unit 6, and when the signal from the control terminal C1 is in the "High" state, the headlight relay driving transistor TR3 is driven to the headlamp 20. Lights up, and if there is a cycle of clock pulses in which the control terminal C2 goes from "LOW" to "High" or "High" to "Low", the headlight relay is connected via the NOR gates (15, 16 and 17). The driving transistor TR2 is driven so that the headlamp 20 is lit.

However, when the headlamp 20 is turned off, when the control terminal C1 is in the "Low" state, the transistor TR3 does not operate immediately, but the transistor TR2 continues to operate. At this time, when the control terminal C2 applies a clock pulse of one cycle, the transistor TR2 also operates. The headlights 20 are turned off.

When the vehicle is stopped, the microcomputer control unit 6 detects the "ON" "OFF" state of the ignition switch 1, and if it is "OFF", it maintains the lighting state at that time without measuring illuminance and then opens the door open detection switch. When the door is opened according to the state of (9), the microcomputer control unit 6 checks through the dimmer padding input detecting circuit whether the dimmer padding switch 21 is operated, and if not, turns off all the lighting states. If it is activated, it delays the predetermined time corresponding to the number of operation.

2 is a flow chart for explaining the operation of the light control apparatus according to the present invention, in which the initialization of the microcomputer memory device and the input / output device is performed in step 101 from the start signal, and in step 102 whether the ignition switch is in the " ON " state. Judging, if YES (i.e., ON state), in step 103, the ambient illuminance is measured from the illuminance sensor, and the previously memorized measured value is discarded and the new measured value is stored, and the procedure goes to step 104. In this step 104, the driving state of the car is measured from the vehicle speed sensor and stored in the storage device. Then, in step 105, it is determined whether the illuminance is greater than 680 lux. If yes, that is, the illuminance is 680 lux. Greater), turn off the headlights and tail lamps in step 106 and go to step 119. If the judgment of step 105 is "no" (i.e., the illuminance is less than 680 lux), the process proceeds to step 107, where it is judged whether the illuminance is greater than 350 lux, and if "yes" (i.e. the illuminance is more than lux) Large) Turn off the tail lamp in step 108 and go to step 119. If no (i.e. illuminance is less than 350 lux), go to step 109. At this stage it is determined whether illuminance is greater than 240 lux and if "yes" (i.e. illuminance is greater than 240 lux) step 110 Turn off the headlights in step 119.

If "No" (i.e. illuminance is less than 240 lux), then proceed to step 111 and if this step determines whether illuminance is less than 160 lux, if "No" (ie, illuminance is greater than 160 lux), then 119 If yes (ie, the illuminance is less than 160 lux), proceed to step 112, in which the illuminance suddenly decreases from 680 lux or more to 160 lux or less (tunnel entry), or If it is "Yes" (i.e. tunnel entry state), the tail lamp and the headlight are turned on in step 113, then the illuminance is increased from 160 to 680 lux in step 114. If yes (if exiting the tunnel), turn off the tail lamp and headlights in step 115, go to step 119, and go to step 119. Status), steady lighting Step 119 goes keeping.

If the judgment of step 112 is "no" (i.e., the change in the illuminance is naturally occurring), only the unclassified lamp is turned on in step 116, the process proceeds to step 117 to determine whether the illuminance is less than 40 lux, and then "no". (I.e., illuminance greater than 40 lux), go to step 119; if " yes " (i.e., illuminance less than 40 lux), the tail lamp and headlight are turned on in step 118 and go to step 119;

On the other hand, if the judgment in step 102 of the above-described step is "no" (that is, the ignition switch is OFF), and proceeds to step 120, the dimmer padding switch to switch from the low beam of the vehicle to the high beam Judging the operating state, if yes (the state in which the dimmer padding switch is in operation), memorize the number of operations in step 121 and go to step 122; if "no" (that is, the dimmer padding switch is in the inactive state), Go to step 122. In step 122, the door is determined to be open. If "No" (i.e., the door is closed), go to step 119. If "Yes" (i.e., the door is open), the headlight is stored as many times as stored in step 121 in step 123. After the delay is turned off, the power is turned off in step 124 and returned to the start point.

In step 119, the controller detects whether the microcomputer is operating normally. If it malfunctions, it resets the circuit and proceeds to step 125 to determine the stationary state of the vehicle. Return and repeat the above operation, and if " YES " (i.e., stop state), proceed to step 126 to determine whether or not a sudden stop is made in this step (126), where " NO " If the headlight is extinguished, the process returns to step 102. If " YES " (i.e. in a sudden stop state), the headlight and tail lamp are maintained in step 127, and the process returns to step 102.

In the above operation description, when steps 108 and 10 are performed by steps 107 and 109, the steps 108 and 110 are not performed immediately after driving about 30 m to 70 m, because of sudden light such as a street light. This is to prevent the reaction immediately when it comes in, even when steps 113, 114, and 115 are performed by step 112, it is not immediately performed and is performed after about 5m-20m driving. The reason is to prevent immediate operation in short tunnels such as overpasses or underpasses.

By selecting the vehicle light control device of the present invention as described above, the light is controlled to turn on and off automatically without the light switch operation when the vehicle is running, and thus the traffic accidents caused by inconvenience and carelessness or malfunction of the light switch operation. It can prevent accidents in advance and contribute to safe operation, and can increase reliability by fail safe function that excludes the change of headlight status in case of malfunction or abnormal operation of control device that can occur frequently during driving. It prevents the battery from overdischarging by preventing the lights from being forgotten, and in particular, by using the dimmer padding switch to turn off the headlight delay, it is possible to secure the front clock of the night road and provide the driver with safety and convenience. have.

Claims (6)

Amplifies the signal of the light sensor and inputs it to the comparator to turn off the upper and lower headlights, and to control the amount of light of the upper headlights according to the output pulse width of the multivibrator. In a vehicle light control device in which the up and down headlights are turned off when the vehicle is stopped, the vehicle speed control device 8 and the door open detection switch 9 are connected to sense a driving speed state and a door open state of the vehicle and corresponding logic thereof. A sensing input conversion circuit 10 for generating a signal, an illuminance detection amount selection switch 11 capable of selecting the illuminance detection step by step, an illuminance detection unit 25, the door open state detection unit 26, and It is connected from the illuminance detection amount selection switch 11 to store a value measured from the illuminance detection unit 25 and the door open state detection switch 9, and selects the stored value from the illuminance detection amount. Microcomputer control unit 6 for comparative control with the value selected from switch 11, and microequivalent stream for generating a signal capable of driving microequivalent lamp 19 according to a signal connected and input from the microcomputer 6; A dimmer padding input sensing circuit connected between the lamp drive output converting circuit 14, the headlamp driving unit 28, and the microcomputer 6 to delay the turning off of the headlamp 20 according to the operation state of the dimmer padding switch 21. Vehicle light control device, characterized in that consisting of (22). The headlamp driving unit (28) according to claim 1, wherein the headlight driving unit (28) is connected to a NOR gate (15) to which an input terminal is connected from the microcomputer (6), and to the NOR gate (15) and the microcomputer (6). A gate 16, a NOR gate 17 connected from the NOR gates 16 and 15, and two input terminals connected to each other, a transistor TR2 connected from the NOR gate 17, and a base terminal of the The light control device for a vehicle, characterized in that the emitter and the base terminal are connected from the microcomputer (6), and the transistor TR3 is respectively connected to the emitter and the base terminal of the transistor TR2. In the vehicle light control method, measuring and storing the ambient light intensity change and the vehicle speed state according to the ON operation of the ignition switch, and comparing the measured light intensity value with the traveling speed state and the illumination sensing amount selection state And comparing the light-lamp selection states of the tail lamps and the headlamps according to the comparison state, detecting the dimmer padding switching state according to the off operation of the ignition switch, and remembering the number of switching times. According to claim 1, The vehicle light control method comprising the step of delaying the headlight off. The method of claim 3, wherein the step of controlling the turning off of the tail lamp and the headlamp comprises: turning off the tail lamp and the headlamp when the illuminance is greater than 680 lux, and turning off only the tail lamp when the illuminance is greater than 350 lux. Controlling the lights, turning off the headlight only when the illuminance is greater than 240 lux, and detecting the entrance of the tunnel to the vehicle when the illuminance is greater than 160 lux. Control the lighting and turn off the light after passing the light.If the detected state is not in the tunnel entry state, control only the lighting of the tail lamp, and if the illuminance is less than 40 lux, turn on the tail lamp and headlight. Vehicle light control method, characterized in that made. 4. The method of claim 3, wherein the step of controlling the flashlight of the tail lamp and the headlamp is performed by controlling the headlight lamp and the headlamp to be turned off in case of a sudden stop and turning off the headlamp only in case of a complete stop. Vehicle light control method comprising the. The method of claim 3, wherein the headlight off delay control step, the headlight off delay time is determined by a predetermined time interval according to the number of dimmer padding switch operation, the number of times the use of the dimmer padding switch is limited to a predetermined range. Vehicle light control method characterized in that.

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