CN2500544Y

CN2500544Y - Practical automatic light changing device for head lamp of automobile

Info

Publication number: CN2500544Y
Application number: CN 01228143
Authority: CN
Inventors: 贾晓东
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-22
Filing date: 2001-06-22
Publication date: 2002-07-17
Anticipated expiration: 2011-06-22

Abstract

An automobile head lamp automatic light changer (14) with environmental light detection adopts two photoelectric detection circuits, one is front light detection circuit (15) for detecting light of front coming automobile, and the other is environmental light detection circuit (16) for detection intensity of the environmental light. The light changer determines the real driving condition of the automobile and determines whether the head lamp should change light or an 'alarming voice' should be generated according to intensity of the front light and the environmental light. The light changer also has a head lamp switch state detector which acts when the head lamp switch is at a main beam state. The light changer needs no switch for operation.

Description

Utility car headlight automatic dimmer

The utility model relates to a kind of Der Scheinwerfer mit FernlichtAbblendlichtStandlicht control device for automatic light change, particularly a kind of headlight Dim Dimmer with practicality of surround lighting detection.

According to " People's Republic of China's regulation of road traffic control " regulation, self-propelled vehicle is not having street lamp or underlit travels down night, must send a car apart from the opposite 150 meters and close country beam mutually in addition, uses passing light instead.It all is to adopt the hand switch operation that past becomes light during the vehicle meeting, development along with society, vehicle on the road is more and more, meeting becomes light and also becomes more and more frequent, the multiplication of chaufeur night travel manipulation strength, unfavorable to safe driving, traffic accident easily takes place in constant light especially when chaufeur that has even meeting.For alleviating the chaufeur burden, people have also invented many automobile automatic dimmers, though can reach the purpose of automatic beam change, all because of not too practical so that can't large-scale popularization.

The purpose of this utility model provides a kind of automobile automatic dimmer of practicality, and it has following characteristics: the one, and can the SELF CL country beam during meeting on not having street lamp or underlit road and use the passing light illumination instead; The 2nd, when entering the block, cities and towns of throwing light on good, become dipped beam automatically; The 3rd, drive a vehicle by day and do not influence the use of upperbeam lamp when need using headlight (abnormal condition or warn), and when the long-term use country beam, send interrupted prompt tone; The 4th, do not increase any additional operating switch, do not change conventional working specification and custom, chaufeur can be adapted to and accept.

The utility model has adopted the two-way photoelectric detective circuit.One the tunnel is that front lighting detects, and is used to detect the light of sending a car in the place ahead, judges the place ahead by comparator circuit and has or not vehicle and whether become light; Another road is that surround lighting detects, and is used for the power of testing environment light, judges vehicle by comparator circuit and travels by day or do not have street lamp or underlit road or the block, cities and towns of throwing light on good.The main logic decision circuitry changes according to the power of front lighting and surround lighting, and binding time changes the actual conditions of judging vehicle, determines that output is " distance light ", " dipped beam ", " prompting flash of light " or " prompt tone ".The main logic of Dim Dimmer is judged the three-dimensional variable determining method that has adopted front lighting variation, surround lighting variation and timing variations, has further improved the reliability of device.Dim Dimmer also has the Der StandlichtScheinwerfer und Parkleuchtenschalter position probing, when Der StandlichtScheinwerfer und Parkleuchtenschalter during in the distance light position device just work.Dim Dimmer is not set up other pilot switch.

Adopt such scheme, the reliability of Dim Dimmer is improved greatly, and the input of Dim Dimmer does not increase the operational motion of chaufeur, do not change the operating habit of chaufeur, and when the vehicle at night intersection, Dim Dimmer meeting automatic beam change is removed the trouble that chaufeur manually becomes light from, alleviate work load for drivers, favourable to traffic safety.

Below in conjunction with accompanying drawing the utility model is further described.

Fig. 1 is a functional block diagram of the present utility model.

Fig. 2 is an embodiment of the present utility model, is the scheme drawing that front lighting detection head and surround lighting detection head are installed in the different sensitive surfaces on the Dim Dimmer.

Fig. 3 is another embodiment of the present utility model, is that front lighting detection head and surround lighting detection head separate with Dim Dimmer, and is installed in the scheme drawing on the diverse location of vehicle.

1. front lighting testing circuits among the figure, 2. ambient light detection circuit, 3. comparator A, 4. comparator B, 5. main logic decision circuitry, 6. logical-arithmetic unit, 7. time meter, 8. driving circuit, 9. country beam, 10. passing light, 11. loudspeaker, 12. Der StandlichtScheinwerfer und Parkleuchtenschalter testing circuits, 13. headlight interface, 14. Dim Dimmer, 15. front lighting detection heads, 16. surround lighting detection heads.

As shown in Figure 1, on the one hand, deliver to comparator A (3) by the detected signal of front lighting testing circuit (1) and carry out voltage ratio, distinguishing front lighting is that " bright " (if any situation of intersection vehicle), " half is bright " (have become the situation of passing light illumination as the intersection car, here " half bright " of indication be light between bright and dark between a value, but not intermediate value, down with) and the state of " secretly " (situation about having finished as intersection), and comparative result delivered to main logic decision circuitry (5); On the other hand, deliver to comparator B (4) by the detected signal of ambient light detection circuit (2) and carry out voltage ratio, distinguishing surround lighting is " bright " (day driving), " half is bright " (as the block, cities and towns of throwing light on good), " secretly " (night travel), and comparative result is delivered to main logic decision circuitry (5).After front lighting of being sent here by comparator A (3) and comparator B (4) and surround lighting state enter main logic decision circuitry (5), change in conjunction with time meter (7) time, judge the running environment and the state of vehicle, and then draw " distance light ", " dipped beam ", " prompting flash of light ", " prompt tone " and carry out by driving circuit (8) output by logic operation (6).The effect of time meter (7) is to calculate the output state of comparator A (3) and comparator B (4) to change and time length, judges usefulness to offer main logic circuit.Dim Dimmer is provided with Der StandlichtScheinwerfer und Parkleuchtenschalter position detecting circuit (12), has only when Der StandlichtScheinwerfer und Parkleuchtenschalter during in the distance light position, and Dim Dimmer just works.

Claims

1, a kind of Der Scheinwerfer mit FernlichtAbblendlichtStandlicht automatic dimmer is characterized in that: have the two-way photoelectric detective circuit, the one tunnel is that front lighting detects, and one the tunnel is that surround lighting detects.

2, Dim Dimmer according to claim 1 is characterized in that: the detection head of every road photoelectric detective circuit can be one or more.