CN2032158U - Headlight adjuster for safe vehicle-meeting - Google Patents

Abstract

The utility model belongs to the field of electronic technology. The utility model provides a light control system for motor vehicle meeting at night superior to the prior art. The utility model utilizes two automatic or semi-automatic control methods to adjust the brightness of the light by the mode of 'jumping 'and ' ramping '. The utility model avoids the intensive glare light during the motor vehicle meeting at night, and the utility model can also ensure definite lighting the vehicle during the motor vehicle meeting; after the motor vehicles meet, the utility model has the function of automatic or semi-automatic recovering to normal light, so, the safety of the night driving can be increased. The adjuster has the advantages of simple structure, economical and convenient use, reliable operation, adapting the drivers' working habit, etc.

Description

Vehicle night safe meeting light modulating device

The utility model belongs to electronic technology field, particularly a kind of lamp light control system that improves the safety of self-propelled vehicle night travel.

The light control of motor-driven vehicle meeting at night, prior art are manual or SELF CL car head lights when meeting, in order to avoid make the other side suffer niphablepsia.But in actual Vehicle during Crossing Event, owing to need finish a series of actions such as changing vehicle running state and light state at short notice.Because of misoperation and close the instantaneous eyesight discomfort that light causes suddenly, very easily cause traffic accident.

The object of the present invention is to provide a kind of self-propelled vehicle night safe meeting beam control system of practicality, this lamp light control system is when sailing vehicle and enter in the certain distance scope, can automatically or semi-automatically adjust lamplight brightness, its adjustment is that the mode with " saltus step " and " alternation " changes lamplight brightness, so that remind the other side and make the chaufeur eyesight can adapt to lamplight brightness gradually in when beginning to change, in Vehicle during Crossing Event, can keep before certain car vehicling lighting also can be behind meeting automatic or S. A. return to normal car light luminance state.

Main points of the present invention are: can use individually or simultaneously automatically or the semiautomatic control mode is come clamp-pulse generator work.The pulse wave of the EDM Generator of Adjustable Duty Ratio of impulse deviser output becomes the special control waveform with a plurality of flex points after via R, C integration, and by be series at high power transistor between power supply and the load (car head light) realize the self-propelled vehicle headlight have saltus step and slowly the brightness of alternation change, select the suitable pulse period, the brightness of car light is changed with the variable in distance between the meeting vehicle, at car head light descending luminance during to minimum (adjustable), to keep certain hour, begin until next cycle.When continuous many cars of meeting, for fear of giving the side of sailing is caused the niphablepsia irradiation, from second period, car light brightness changes in the alternation scope.Can be automatically after meeting finishes or S. A. return to the car light normal condition.

The schematic circuit of a kind of embodiment of the present invention as shown in Figure 1, accompanying drawing 2 is the control process relation curve.

Principle of work of the present invention is as follows: have special light hurdle structure and can prevent that the photoelectricity receiving converter (can comprise or not comprise the IC op amp in interior) of inoperative light source interference is installed in front part of vehicle (operator's compartment or elsewhere), after it experiences the upper beam of opposite vehicle of certain intensity, the small-sized time relay closure of IC mouth, K switch _JConnect, impulse deviser and control are carried out partly and power connection, by schematic diagram 1 as can be known, work as K _JWhen forwarding at 2 by 1, car light L1, L2 change by high power transistor series connection control, at this moment, the collector voltage of T3 is a power line voltage, adjust fully conducting of pipe (Darlington), because the inevitable saturation voltage drop of practical transistor, have only the 70%-90% car light brightness of power line voltage to be kept to 1/2nd to 2/3rds (brightness of filament and nonlinear characteristics of voltage) of former brightness, the what is called of brightness that Here it is " saltus step " so be added to the voltage of headlight filament two ends.The adjustable square wave of impulse deviser output duty cycle that A2 and other elements are formed becomes sawtooth wave behind R, C integration, along with the voltage at capacitor C two ends constantly raises, T3 is gradually by by conducting at leisure, V _C3Voltage is reduced gradually by height, and high power transistor ends gradually, " alternation " process of car light brightness that Here it is.

Owing to adopted small-sized time relay, no matter have or not follow-up work illumination on the photoelectricity receiving converter, this mode of operation all can be kept certain hour (1 second or above 1 second), behind no follow-up work illumination (without male offspring extended meeting car) certain hour (1 second or above 1 second), time relay discharges, car light returns to normal condition, if before time relay discharges follow-up work illumination (follow-up meeting) is arranged again, then repeats " alternation " process.

The semiautomatic control process is: without photoelectricity receiving converter and small-sized time relay, when two to sailing car when the certain distance, connect K switch _J, this light modulating device will carry out once " saltus step " and " alternation " process of repetition, until K switch _JReset.

The invention has the advantages that: avoided prior art when meeting, to close suddenly the car headlight, the instantaneous eyesight that causes is uncomfortable and also need finish the complex operations (this device automanual system can operate) that changes the light state the vehicle running state except finishing to change than the Yuanan full distance time in the short time of meeting, the disadvantage that in fact the prominent bright prominent dark control mode of also having avoided some prior art to adopt still dazzles the eyes has also avoided some prior art to adopt the labyrinth of the change car light irradiation angle of more mechanical, electrical parts realization. Economic convenient, simple in structure, the reliable operation of this device, Can avoid dazzling the eyes and can keep certain driving illumination and adapt to existing operating personnel's work habit.

The luminous sensitivity that one embodiment of the present of invention adopt is 21ux, and the dutycycle of signal generator is 1:5, and above-mentioned parameter can be adjusted according to different application requirements and vehicle lamp.

Claims (5)

1, a kind of vehicle night safe meeting light modulating device, specifically be the change car light luminance brightness that constitutes by car light and control circuit automatically and semi-automatic controller, it is characterized in that said control circuit comprises photoelectric detective circuit, pulse generating circuit and control executive circuit.

2, vehicle night safe meeting light modulating device according to claim 1 is characterized in that said control executive circuit comprises the high power transistor that is serially connected with between power supply and the load (lamp).

3, vehicle night safe meeting light modulating device according to claim 1 is characterized in that said pulse generating circuit comprises Resistor-Capacitor Unit and integrated operational amplifier (also breakaway-element).

4, vehicle night safe meeting light modulating device according to claim 1 is characterized in that said photoelectric detective circuit comprises the photoemissive element of small-sized time relay and light hurdle structure.

5, vehicle night safe meeting light modulating device according to claim 1 is characterized in that said S. A. adjusting realizes by switch.