CN201590926U

CN201590926U - Auto-dimming device for headlamp of motor vehicle

Info

Publication number: CN201590926U
Application number: CN2009202798557U
Authority: CN
Inventors: 赵立
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-11-23
Filing date: 2009-11-23
Publication date: 2010-09-22
Anticipated expiration: 2019-11-23

Abstract

An auto-dimming device for the headlamp of a motor vehicle comprises a voltage stabilizing circuit 1, a singlechip circuit 2, a signal transmitting and receiving circuit 3, a detection circuit 4, a safety prompt circuit 5, a dimming executive circuit 6, and a gradual dimming control circuit 7. When in use, the auto-dimming device is mounted in the engine cover and the cab of the motor vehicle, and is connected with an ignition switch 11, a dimming switch 12, a dipped headlight 8 and a high beam 9 which are originally arranged in the vehicle. When two vehicles mounted with the auto-dimming device meet, the one with the high beam turned on in violation of regulation is forced to automatically change into the dipped headlight turned on when the other turns on the dipped headlight; after changing into the state of the dipped headlight turned on, when the vehicle needs to turn on the passing light or transmit emergency prompt signals, the high beam can be used in an intermittent manner; and after the meeting, the high beam is self-restoring. Therefore, accidents caused by the dazzling of the high beam are avoided and traveling safety recoveries by the self. The device has the advantages of convenient installation, reliable operation and no influence to other functions of the motor vehicle.

Description

Automatic device for changing light of front headlight of motor vehicle

Technical field

The utility model relates to a kind of used circuit of illumination optical apparatus of motor vehicles, specifically, relates to a kind of automatic device for changing light of front headlight of motor vehicle.

Background technology

Front headlight of motor vehicle possesses distance light, two kinds of illumination functions of dipped beam.Motor vehicle is at night during cruising, the general high beam that adopts throws light on, and when two car intersections, dazzle the eyes for preventing distance light, avoid consequent traffic safety accident, national communication portion is about the motor vehicle security regulations: during motor-driven vehicle meeting at night, apart outside 150M, the meeting both sides just should initiatively become headlamp the dipped headlights illumination, because motor vehicle is far away, the conversion of dipped beam is manually to be handled by the driver, because of driver's carelessness, quality is low, reasons such as malice unlatching, current mobility car night safe meeting is unsatisfactory, dazzle the eyes the traffic accident that causes because of high beam night and happen occasionally, be unfavorable for safe driving.

The utility model content

In order to solve existing motor vehicle causes traffic accident because of long switch-on distance light when meeting at night problem, the purpose of this utility model, be to provide a kind of motor vehicle that forces that high beam is automatically changeb to the automatic device for changing light of front headlight of motor vehicle of dipped headlights, thus the safe driving when guaranteeing to meet at night.

Solution of the present utility model is as follows.Referring to Fig. 1 electric functional-block diagram of the present utility model, the utility model it by voltage stabilizing circuit 1, single chip circuit 2, signal transceiver circuit 3, testing circuit 4, safety instruction circuit 5, become light executive circuit 6, progressive change light control circuit 7 connects to form, wherein the output 101 of voltage stabilizing circuit 1 is connected respectively to single chip circuit 2, the working power end of signal transceiver circuit 3 and testing circuit 4 is to provide dc supply, the FPDP of single chip circuit 2 links to each other with control port with the FPDP of signal transceiver circuit 3 respectively with control port, the control port of single chip circuit 2 respectively with become light executive circuit 6, progressive change light control circuit 7, the control port of testing circuit 4 and safety instruction circuit 5 joins, the output of testing circuit 4, the output of the dipped headlights input end of one end and single chip circuit 2 and change light executive circuit 6 connects together, the other end links to each other with the output of progressive change light control circuit 7, becomes the working power end of light executive circuit 6 and the working power end of progressive change light control circuit 7 and connects together.

The utility model with foregoing circuit structure is when installing and using, the power input of its voltage stabilizing circuit 1 is connected with motor vehicle ignition switch 11 movable contact head ends 111, output of above-mentioned testing circuit 4 is connected end altogether with the dipped headlights signal prompt end of single chip circuit 2 be connected, the end that connects altogether of the working power end of above-mentioned change light executive circuit 6 and progressive change light control circuit 7 is connected with another stationary contact 123 of motor vehicle dimmer switch 12 with output and the power input of the dipped headlights 8 and stationary contact 122 of motor vehicle dimmer switch 12 that becomes light executive circuit 6; Simultaneously, another output with testing circuit 4 is connected with the output of progressive change light control circuit 7 and the power input of high beam 9.Main frame of the present utility model can be installed in the motor vehicle engine lid or the driver's cabin gap, only needs associated tracks with headlight in self lead and the motor vehicle fuse box etc. to be connected by above-mentioned annexation and gets final product.LED light in the safety instruction circuit 5 then can be drawn with lead separately and is connected to bridge instrumentation dish and place, front windshield slit, like this with regard to unlikely damage instrument panel of motor vehicle.

Operation principle of the present utility model is as follows.The prerequisite that operation principle is described is all to have installed the utility model automatic device for changing light of front headlight on two motor vehicles that meet at night.Connect motor vehicle ignition switch 11, just to voltage stabilizing circuit 1 power supply, the output 101 of voltage stabilizing circuit 1 provides stable dc supply to single chip circuit 2, signal transceiver circuit 3 and testing circuit 4 to power supply 10 in the motor vehicle car.In the time of when driving, need opening dipped headlights 8, the moving contact of motor vehicle dimmer switch 12 is beaten to 122 dipped beam shelves from 121 neutral gears.Power supply 10 is given dipped headlights 8 power supplies and it is opened bright in the car, the interior power supply 10 of car this moment also acts on the control end of single chip circuit 2, be judged as high level through single chip circuit 2, output signal to signal transceiver circuit 3, make its varying optical signal, and after some seconds, stopping emission under the running of single chip circuit 2 internal processes to the other side's motor vehicle emission certain frequency of meeting.When needs are opened high beam 9, then with 12 dozens of dimmer switches to 123 distance light shelves, so in the car power supply 10 to become light executive circuit 6, progressive change light control circuit 7 provides dc supply, and simultaneously through the field effect transistor V2 of asymptotic change optical circuit 7 to high beam 9 power supplies and open bright high beam 9.Meanwhile, the signal that progressive change light control circuit 7 is opened high beam acts on single chip circuit 2 and through being judged as high level, after the time (generally can be set at 0.2 second) that its internal processes is set, if this high level is still constant, single chip circuit 2 just outputs signal to signal transceiver circuit 3, signal transceiver circuit 3 is in receives the varying optical signal state.Otherwise, then return initial state, this time-delay of 0.2 second receives varying optical signal, can guarantee motor vehicle whenever all can open off and on high beam 9 (as beat overtake other vehicles and promptly during warning light).After signal transceiver circuit 3 is in the varying optical signal that the other side's motor vehicle of receiving the varying optical signal state and receiving meeting sends, the control end of single chip circuit 2 is sent signal and is given the input that becomes light executive circuit 6, make and become field effect transistor V1 conducting in the light executive circuit 6, so it is bright that dipped headlights 8 opens, single chip circuit 2 starts the progressive change light path preface of time-delay simultaneously, promptly the series of pulses that increased gradually from its control end output pulse width in some seconds is given progressive change light control circuit 7, be transformed into high beam voltage through progressive change light control circuit 7 from Nv (Nv into the motor vehicle car in the supply voltage of power supply 10) to OV, this voltage give high beam 9 make its by bright to dark.Single chip circuit 2 is carried out progressive change light path preface, and whole change photoreduction process can be made as 15S, and wherein to become OV by Nv be 5S to the voltage on the high beam 9, and ov holds time and is 10S; Single chip circuit 2 is sent control signal discontinuously and is given safety instruction circuit 5 during this, makes its contained LED light be flicker shape (light and shade alternately), to point out as auxiliary security.When high beam 9 complete deepenings and after (15S when being whole meeting becomes photoreduction process finish after) through 10 seconds, the control end of single chip circuit 2 is sent signal and is given the input that becomes light executive circuit 6 and progressive change light control circuit 7, the field effect transistor V1 that becomes light executive circuit 6 is ended, the V2 conducting of progressive change light control circuit 7, so dipped headlights 8 extinguishes, high beam 9 opens bright, and motor vehicle recovers the high beam illumination again.Simultaneously because the utility model single-chip microcomputer contains internal memory, thereby system can write down, preserve, delete multiple information as requested, according to establishing the program requirement in the single chip circuit 2, signal transceiver circuit 3 is except that transmitting and receiving the varying optical signal, can also transmit and receive other signal, as: self encrypted message that can will be retained in after receiving cue in the memory is launched.In addition, because single-chip microcomputer contains built-in AD conversion, behind the system boot, when motor-driven vehicle headlight adapter (damage) does not open when bright, under the program indication, can respectively the parallel resistance of dipped headlights 8 and high beam 9 be measured through the built-in AD conversion of single-chip microcomputer by the output of the amplifier IC4 in the testing circuit 5 high level, and resistance is recorded in the internal memory preserves, when detecting headlight, under the program indication, the data that kept in new measuring resistance data and the memory need only be compared, increase if find resistance, system judges that promptly headlight damages, and is advanced into resting state certainly, this moment signal transceiver circuit 3 neither emission do not receive varying optical signal yet, LED can make alarm in the safety instruction circuit 5.Be in when forcing to become in the photoreduction process when motor vehicle reception varying optical signal, if progressive change light control circuit 7 breaks down, then it can give 2 one cues of single chip circuit, and according to the internal processes of single chip circuit 2, complete machine also can enter aforesaid resting state.Above-mentioned resting state is by the internal memory recorded and stored, if system receives prompting breaking dormancy status signal, this sleep state information will be deleted by system, but complete machine breaking dormancy state.

The beneficial effects of the utility model are: the purpose that 1. reaches both sides' civilization meeting by mandatory change light.Because this system adopts single chip machine controlling circuit, this system's everything is by single-chip microcomputer plug-in commander, when the motor vehicle that this system is housed is opened high beam and travelled, after receiving varying optical signal, single-chip microcomputer is carried out progressive change light path preface, and dipped beam opens bright, and distance light extinguishes gradually, become between the photophase (15S), under the program indication, motor vehicle can use high beam in intermittence ground, as: play overtake other vehicles lamp and urgent prompting, in addition, the fixing use high beam of motor vehicle.Can stop the part driver like this and be become after the light, recover rapidly again to use the high beam illumination, guarantee finishing of whole Vehicle during Crossing Event by adjusting headlamp beam switch.Simultaneously, significantly mandatory owing to being had by the change photoreduction process, help this motor vehicle and also initiatively become light.Reach the purpose of both sides' civilization meeting.2. can guarantee driver's driving at night safety.Motor vehicle was forced to become between the photophase, and dipped headlights is bright entirely, and high beam extinguishes gradually, and whole process vision nature does not have the sudden change sense, guarantees driver's driving at night safety.Safety instruction circuit 5 LED light that are arranged in driver's cabin simultaneously keep high brightness flicker, make safe aid prompting.In addition, single-chip microcomputer contains built-in AD conversion in the native system single chip circuit 2, testing circuit 4 contains amplifier, under interlock circuit is supported, can detect automatically headlight and progressive change light control circuit 7 by the Single Chip Microcomputer (SCM) program requirement, as finding that headlight damages or progressive change light control circuit 7 breaks down, system can enter resting state automatically, and by the LED alarm.Guarantee to become the safety of photoreduction process, eliminate safe hidden trouble.3. easy to install.As previously mentioned, this device for changing light need not change the motor vehicle owned circuit when installing, and uses the own power supply of motor vehicle, and all operations is by the own headlight dimmer switch control of motor vehicle.When opening dipped headlights, this device for changing light can be launched varying optical signal, and when opening high beam, this dimmer can receive varying optical signal, and produces relevant action automatically, and is easy to use.4. have complete emission, reception and writing function.As previously mentioned, because single-chip microcomputer contains internal memory in the single chip circuit 2, its signal transceiver circuit 3 is except that can receiving the emission varying optical signal, can also receive or launch other signal, after receiving the special cue of sending in the external world, system can launch self encrypted message that is kept in the memory.Therefore, in certain area, if unified this device of installing of motor vehicle, external system can be by launching cue to motor vehicle, and according to specific self encrypted message that this motor vehicle emits its identity is discerned automatically, can make things convenient for the inspection work of functional department like this to this area's motor vehicle.

Description of drawings

Fig. 1 is an electric functional-block diagram of the present utility model;

Fig. 2 is the schematic diagram of Fig. 1 a kind of physical circuit of the present utility model.

Embodiment

Referring to Fig. 1 and Fig. 2.Voltage stabilizing circuit of the present utility model (1) is made of integrated voltage stabilizer IC1, single chip circuit (2) is by the single-chip microcomputer IC2 that contains internal memory and AD conversion, resistance R 3, R9, R15, R16 connects to form, signal transceiver circuit (3) is made of radio receiving transmitting module IC3, testing circuit (4) is by amplifier IC4 (IC4-A, IC4-B), capacitor C 1, C2, resistance R 4, R5, R6, R7, R11, R12, R13, R14, R17, R21 connects to form, safety instruction circuit (5) is by LED, resistance R 10, connect to form, become light executive circuit (6) by field effect transistor V1 triode T1, resistance R 1, R2, R8 connects to form, and progressive change light control circuit (7) is by field effect transistor V2, triode T2, resistance R 18, R19, R20 connects to form.Wherein the output 101 of the integrated voltage stabilizer IC1 of voltage stabilizing circuit 1 is connected respectively to the VCC end of the single-chip microcomputer IC2 of single chip circuit 2, VCC end and the resistance R 7 of radio receiving transmitting module IC3, the end of R11, the GND port ground connection of the single-chip microcomputer IC2 of single chip circuit 2, R4 in IC2 input and the testing circuit 4, R13 links to each other, all the other IC2 ports are imported with the data of radio receiving transmitting module IC3 respectively, output, transmitting-receiving conversion and control end, 1 of

amplifier ic chip

4,7 pin, resistance R 8, R3, R9, R10, R18, R15, R16, R17, the end of R21 links to each other, the resistance R 18 of single chip circuit 2 is connected with the base stage of the triode T1 of progressive change light control circuit 7, R8 links to each other with the base stage of the triode T1 that becomes light executive circuit 6, resistance R 6 in the testing circuit 4, resistance R 3 connects end altogether and links to each other with the field effect transistor V1 drain electrode that becomes light executive circuit 6 in R7 and the single chip circuit 2, resistance R 11 in the testing circuit 4, resistance R 15 connects end altogether with the resistance R 19 in the progressive change optical circuit 7 in R12 and the single chip circuit 2, after field effect transistor V2 source electrode links to each other, again with the field effect transistor V1 source electrode that becomes light executive circuit 6, R1 links to each other.The drain electrode of the field effect transistor V2 of progressive change light control circuit 7, resistance R 21 are connected with the high beam input.The model of IC1 among Fig. 2, IC2, IC3 and IC4 can adopt LM78L05, PIC16F676, STR-6 and LM358 respectively, and is all commercially available.

Fig. 2 embodiment circuit is when installing and using, the power input of its integrated voltage stabilizer IC1 is connected with the movable contact head end 111 of motor vehicle ignition switch 11, the end that connects altogether of the drain electrode of R3, R6, R7 and field effect transistor V1 is connected with the stationary contact 122 of motor vehicle dimmer switch 12, with the source electrode of field effect transistor V1, V2, the end that connects altogether of resistance R 1, R19, R11, R12, R15 is connected with the stationary contact 123 of motor vehicle dimmer switch 12; Simultaneously, the drain electrode of field effect transistor V2 and the end that connects altogether of resistance R 21 are connected with the input of high beam 9.

Referring to Fig. 2.The interior power supply 10 of the motor vehicle car battery voltage EC of embodiment in the drawings is 12V, and the voltage of integrated voltage stabilizer IC1 output 101 is 5V.When driving the time need be opened dipped headlights, to dipped beam shelves 122, dipped headlights 8 opened bright with 12 dozens of dimmer switches, and this moment, single-chip microcomputer IC2 judged that its P-4 pin is a high level, and radio receiving transmitting module IC3 begins to launch the varying optical signal of 433MHZ, stops emission after 3 seconds.When need are opened high beam 9, with 12 dozens of dimmer switches to distance light shelves 123, so EC through field effect transistor V2 to high beam 9 power supplies and open bright.Meanwhile; single-chip microcomputer IC2 judges that its P-6 pin is a high level; 0.2 a second back radio receiving transmitting module IC3 then is initially located in the varying optical signal state that receives; otherwise just return initial state; the time-delay in this 0.2 second receives varying optical signal, can guarantee motor vehicle whenever can intermittently open high beam 9 (as beat overtake other vehicles and promptly during warning light).After radio receiving transmitting module IC3 is in reception varying optical signal state and receives the varying optical signal of 433MHZ, the P-2 pin of single-chip microcomputer IC2 is in high level, make T1, V1 conducting, so it is bright that dipped headlights 8 opens, single-chip microcomputer IC2 starts the progressive change light path preface of time-delay simultaneously, the i.e. series of pulses that P-5 pin output pulse width increases gradually in some second converts high beam voltage from 12V to OV to through T2, V2, this voltage give high beam 9 make they by bright to secretly.Whole change photoreduction process is 15s, and wherein to become OV by 12V be 5s to the voltage on the high beam 9, the OV 10S that holds time; Be forced to become in the photoreduction process, if the driver becomes high beam into dipped headlights earlier in 15S.Revert to high beam then again, at this moment, single-chip microcomputer will continue to finish progressive change photoreduction process; High level appears in this period P-5 pin discontinuously, and LED light is the flicker shape.When high beam 9 complete deepenings and through after 10 seconds kinds, P-2 pin zero setting level ends T1, V1, and the P-5 pin is put high level, makes T2, V2 conducting, so dipped headlights 8 extinguishes, high beam 9 opens bright, and motor vehicle recovers far lighting again.Because single-chip microcomputer includes internal memory, system is according to the program requirement of single-chip microcomputer IC2, radio receiving transmitting module IC3 also can transmit and receive other signal except that transmitting and receiving the varying optical signal, and self encrypted message that both can will be kept at after receiving cue in the memory is launched.The principle of testing circuit is: behind the system boot, when motor-driven vehicle headlight adapter (headlight all damage) does not open when bright, under the Single Chip Microcomputer (SCM) program indication, can respectively the resistance of dipped headlights 8 and high beam 9 be measured by the built-in AD conversion of the output of the amplifier integrated package output pin in the testing circuit 4 high level footpath single-chip microcomputer, and resistance data is recorded in the single-chip microcomputer internal memory preserves, when detecting headlight, under the program indication, the data that kept in new measuring resistance data and the memory need only be compared, if two headlights in parallel arbitrarily damage one, this group resistance increases and is twice, and old data obviously are not inconsistent in this moment new data and the memory, and system promptly enters resting state.LED flicker simultaneously, expression have headlight to damage.Motor vehicle damages as if field effect transistor V forcing to become in the photoreduction process, and this moment, complete machine also entered resting state.System does not promptly launch and does not receive varying optical signal yet, the system that is in resting state still can receive other non-varying optical signal, if receive the inspection cue, system is kept at information in the memory with emission, if the cue of receiving breaking dormancy, system recovers the breaking dormancy state again emission and presses the ability of receiving varying optical signal.

Claims

1. automatic device for changing light of front headlight of motor vehicle, it is characterized in that, it is by voltage stabilizing circuit (1), single chip circuit (2), signal transceiver circuit (3), testing circuit (4), safety instruction circuit (5), become light executive circuit (6), progressive change light control circuit (7) connects to form, wherein the output (101) of voltage stabilizing circuit (1) is connected respectively to single chip circuit (2), the working power end of signal transceiver circuit (3) and testing circuit (4) is to provide dc supply, the FPDP of single chip circuit (2) links to each other with control port with the FPDP of signal transceiver circuit (3) respectively with control port, the control port of single chip circuit (2) respectively with become light executive circuit (6), progressive change light control circuit (7), the control port of testing circuit (4) and safety instruction circuit (5) joins, the output of testing circuit (4), the dipped headlights input end of one end and single chip circuit (2) connects together, the other end links to each other with the output of progressive change light control circuit (7), becomes the working power end of light executive circuit (6) and the working power end of progressive change light control circuit (7) and connects together.

2. automatic device for changing light of front headlight of motor vehicle according to claim 1, it is characterized in that, voltage stabilizing circuit (1) is made of integrated voltage stabilizer IC1, single chip circuit (2) is by the single-chip microcomputer IC2 that contains internal memory and AD conversion, resistance R 3, R9, R15, R16 connects to form, signal transceiver circuit (3) is made of radio receiving transmitting module IC3, testing circuit (4) is by amplifier IC4 (IC4-A, IC4-B), capacitor C 1, C2, resistance R 4, R5, R6, R7, R11, R12, R13, R14, R17, R21 connects to form, safety instruction circuit (5) is by LED, resistance R 10 connects to form, become light executive circuit (6) by field effect transistor V1, triode T1, resistance R 1, R2, R8 connects to form, and progressive change light control circuit (7) is by field effect transistor V2, triode T2, resistance R 18, R19, R20 connects to form.