CN2196567Y - Fully-automatic light-changing device for headlight of automobile - Google Patents

Abstract

The utility model discloses a fully-automatic light changing device for the headlights of automobiles, which is composed of an automatic voltage regulator circuit, a signal amplification circuit, a control time delay circuit, a trigger circuit, etc. The change of long-distance light and short-distance light can be controlled automatically during meeting by adjusting a variable resistance and confirming the distance range of the opposite automobile, and the long-distance light and the short-distance light are restored after meeting. The utility model which has the advantages of high sensitivity and good interference rejection lightens the workload of drivers and provides insurance for safe driving.

Description

Fully-automatic light-changing device for headlight of automobile

The utility model belongs to the self-propelled vehicle illumination control apparatus.

Need during the automobile night travel with the headlight illumination, but when two car intersections, must use the passing light illumination instead,, cause the opposite vehicle driver to dazzle the eyes, influence safety to avoid the country beam acute irradiation.Therefore the chaufeur night travel is except that normal running, also frequent conversion instant and near light light switch.At present, used change-over switch is generally manually or foot-operated switch, and the normal running of these switches and chaufeur, it is close that the position is set, and moves identical.Under frequent meeting situation, the chaufeur work capacity increases, burden, and it is in a rush to occur unavoidably, and operation inconvenience influences safe driving.Recently also have and improving aspect the Der Scheinwerfer mit FernlichtAbblendlichtStandlicht illumination, realize the automatic conversion control device of instant and near light lamp, but sensitivity and reliability are still not ideal enough.

The purpose of this utility model is the deficiency that overcomes prior art, provide a kind of can be sensitive and automatically controlled Der Scheinwerfer mit FernlichtAbblendlichtStandlicht automatic dimmer stably, make it the distance of sending a car, automatically the far-near light modulation of alternate automobile according to the opposite.

The purpose of this utility model realizes by following measure:

Full automatic car headlight Dim Dimmer by power supply, country beam A, passing light B, manually or foot-operated switch K1, automatic voltage regulation circuit, signal amplification circuit, trigger circuit, delay control circuit and Dim Dimmer shell form, it is characterized in that automatic voltage regulation circuit, signal amplification circuit, trigger circuit, delay control circuit that this Dim Dimmer is made up of three-terminal regulator block IC1, cond C1, photodiode D1, aerotron BG1, variable resistance W1, ic chip 2, relay J 1, resistance R 1, variable resistance W2, cond C2, diode D2, relay J 2; In circuit, IC1 and C1 form the automatic voltage regulation circuit; The 8 pin power connection positive poles of IC2,1 pin ground connection, W1 one termination just, 2,6 pin of a termination IC2, the emitting stage of BG1 are connected in 2,6 pin of IC2, grounded collector, base stage meet photodiode D1, J1 is connected between 3 pin and ground of IC2, form to amplify and trigger circuit; 8,4 pin power connection positive poles, 1 pin ground connection, R1 one termination just, a termination 7 pin, W1 one termination 7 pin, a termination 2 and 6 pin, C2 positive pole connect 2 and 6 pin, negative earth, J2 and protection diode D2 are connected between 3 pin and ground of IC3.

Accompanying drawing is the utility model embodiment circuit diagram

D1 is a photodiode; D2 is the 1N4007 diode; BG1 is 9015 aerotrons; IC1 is the L7812 three-terminal regulator block; Base integrated package when IC2, IC3 are NE555; R1 is a 5.1K resistance, and W1 is a 100K resistance, and W2 is a 220K resistance; C1 is a 16V1000 μ F electric capacity, and C2 is a 16V22 μ F electric capacity; J1 is 4098, the 12V miniature electro-magnetic relay; J2 is the small-sized middle power relay (contact electric current 10-20A) of T90,12V; K1 is manual or foot-propelled Dim Dimmer switch; J1-1 is the miniature relay switch sections; J2-1, J2-2 are small-sized middle power relay switch part.

Embodiment: when manual or foot-propelled Dim Dimmer K switch 1 were connected, the power supply input was defeated by circuit 12V fixed voltage through IC1 and C1, if the place ahead does not have car bulb, the unglazed irradiation of photodiode D1 is in off condition, and BG1 is in off condition because of no base current.Supply with " 2 ", " 6 " pin of IC2 by W1 when electric current, at this moment IC2 " 6 ", " 2 " pin are in high potential, approach power line voltage, " 3 " pin output active potential, relay J 1 is in release position, and relay J 1-1 often opens, power supply can not be supplied with time base circuit, at this moment relay J 2 is in release position, and relay J 2-1 is normally closed, and Der Scheinwerfer mit FernlichtAbblendlichtStandlicht A keeps distance light; D1 is subjected to the light time when photodiode, photosensitive tube D1 forward resistance sharply descends, the BG1 trend is saturated, " 2 " of IC2, " 6 " pin voltage begin to descend, when " 2 ", " 6 " pin voltage drop to 1/3 power line voltage when following, IC2 is triggered, " 3 " pin output high potential, relay J 1 adhesive at this moment makes the J1-1 closure, power supply is supplied with ic chip 3 work, at this moment " 2 ", " 6 " pin are in active potential, IC3 " 3 " pin output high potential that is triggered, relay J 2 adhesives at this moment, make relay J 2-2 closure, headlight becomes dipped beam B by distance light A; When capacitor C 2 chargings are higher than 2/3 power line voltage, " 2 " of IC3, " 6 " pin are in high potential, " 3 " pin output active potential, at this moment relay J 2 discharges, J2-2 often is in and opens, at this moment headlight becomes distance light A by dipped beam B, and the IC3 time base circuit forms no steady operation mode like this, and relay J 2 is also by regular hour adhesive and release simultaneously.As long as photodiode D1 is subjected to light all the time, become distance light by this full automatic car Dim Dimmer by dipped beam, the distance light dimming carries out periodical duty always, up to not being subjected to the light time, just becomes fixedly distance light.W1 is adjusted to 7.5K with variable resistance, makes to reach more than 250 meters by spacing; Adjust variable resistance W2 to 100K, making far and near light time length is 2 seconds, and photodiode D1 is arranged on operator's compartment, the bench board dead ahead.Variable resistance W1, W2 are arranged on the Dim Dimmer housing face-plate so that use.

Because this circuit layout is employing IC1 is that L7812 three-terminal regulator block and capacitor C 1 constitute constant voltage power suspply, gives good power supply of entire circuit, so circuit is not subjected to the voltage disturbance of automobile current generator.The signal that photodiode D1, aerotron BG1, variable resistance W1 form amplifies and oscillating circuit, can amplify weak one.Adjust W1 and can change automobile meeting electrical distance, it is big that resistance becomes, and distance becomes far, and resistance diminishes, and it is near that distance becomes.IC2 and J1 form trigger circuit, and the power supply of J1-1 energy moment conducting and cut-out time base circuit is in order to avoid the time base circuit misoperation.R1, W2, C2, IC3, D3, J2 form a no stable state time base circuit, and advantage is to adjust W2 can change automobile by the distance light dimming, and by between the meeting light time between the dipped beam change distance light, resistance diminishes, and becomes between the light time to shorten again.

Advantage of the present utility model: owing to adopt advanced integrated regulator, therefore operating voltage is not subjected to the interference of automobile engine voltage pulsation, sensitive reliable, not only overcome general dimmer manual or foot-propelled and operated the not easy disadvantage that has an accident, also stronger, more reliable and more stable than general auto lamp automaton luminous sensitivity. Make the driver in the driving at night of no bend, what operational degree was bigger alleviates, and can concentrate one's energy to process other situation, the generation of greatly minimizing accident.

Claims (1)

1, full automatic car headlight Dim Dimmer by power supply, country beam A, passing light B, manually or foot-operated switch K1, automatic voltage regulation circuit, signal amplification circuit, trigger circuit, delay control circuit and Dim Dimmer shell form, it is characterized in that automatic voltage regulation circuit, signal amplification circuit, trigger circuit, delay control circuit that this Dim Dimmer is made up of three-terminal regulator block IC1, cond C1, photodiode D1, aerotron BG1, variable resistance W1, ic chip 2, relay J 1, resistance R 1, variable resistance W2, cond C2, diode D2, relay J 2; In circuit, IC1 and C1 form the automatic voltage regulation circuit; The 8 pin power connection positive poles of IC2,1 pin ground connection, W1 one termination is just; 2,6 pin of one termination IC2, the emitting stage of BG1 are connected in 2,6 pin of IC2, and grounded collector, base stage meet photodiode D1, and J1 is connected between 3 pin and ground of IC2, form and amplify and trigger circuit; 8,4 pin power connection positive poles, 1 pin ground connection, R1 one termination just, a termination 7 pin, W1 one termination 7 pin, a termination 2 and 6 pin, C2 positive pole connect 2 and 6 pin, negative earth, J2 and protection diode D2 are connected between 3 pin and ground of IC3.

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