CN104742796A - Automatic lamplight controller - Google Patents
Automatic lamplight controller Download PDFInfo
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- CN104742796A CN104742796A CN201510112889.7A CN201510112889A CN104742796A CN 104742796 A CN104742796 A CN 104742796A CN 201510112889 A CN201510112889 A CN 201510112889A CN 104742796 A CN104742796 A CN 104742796A
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Abstract
Provided is an automatic lamplight controller. The automatic lamplight controller comprises a control circuit, a photosensitive sensor, a lamplight sensor, a triaxial acceleration sensor U3, a car speed signal, combined lamplight signals, a driving circuit, low beam lamps, high beam lamps and the like. The control circuit comprises an external power supply input circuit connected with the input end of a single chip microcomputer U4, a crystal oscillation circuit and a program download interface circuit. The output ends of the photosensitive sensor, the lamplight sensor, the car speed signal, and the combined lamplight signals are connected with the input end of the single chip microcomputer U4. The output end of the triaxial acceleration sensor U3 is connected with an SPI interface of the single chip microcomputer. The output end of the control circuit is connected with the low beam lamps and the high beam lamps through the driving circuit. According to the changes in the intensity of ambient light, headlamps of a car are automatically controlled to be lightened or turned off, the potential safety hazards caused by frequent light changing or no light changing to the safe driving are prevented, and the safety of night driving is guaranteed.
Description
Technical field
The present invention relates to automobile automation field, specifically a kind of automatic light controller.
Background technology
At present, car headlamp operating mode is Non-follow control, in vehicle night meeting process, often can run into the other side to send a car the situation that country beam is often held, because country beam can make subtend Driver Vision produces moment blinding, the other side's chaufeur does not see front road conditions, there is very large hidden peril of accident; When front vehicle opens country beam, in the interior outside rear-view mirror of front truck, there will be large area halation, front truck chaufeur can be affected and observe rear situation from back mirror.During night travel uphill/downhill, when the car bulb gone in the same direction and uphill/downhill, the reflected light on road surface can affect the vision of chaufeur, if chaufeur will be caused too by force to see do not show road ahead, so need the distance-light of chaufeur manual switchover automobile in time, part depot is equipped with head lamp autonomous cruise speed system controlling oneself in vehicle, according to the automatic control that far away/passing light switches before carrying out, most of cost is higher, and function is comparatively simple.
Summary of the invention
For above problems of the prior art, the invention provides a kind of automatic light controller.
The present invention is achieved by the following technical solutions:
A kind of automatic light controller, described automatic light controller comprises control circuit, photosensor, Light indicator, 3-axis acceleration sensor U3, vehicle speed signal, combined light optical signal, driving circuit, passing light, country beam etc., described control circuit comprises the external power supply input circuit be connected with micro controller system U4 input end, crystal oscillating circuit, download program interface circuit, described photosensor, Light indicator, vehicle speed signal, the mouth of combined light optical signal connects the input end of micro controller system U4, the mouth of described 3-axis acceleration sensor U3 connects the SPI interface of micro controller system, described control circuit mouth connects passing light by driving circuit, country beam.
Described automatic light controller can Real-time Collection photosensor, Light indicator, 3-axis acceleration sensor U3, vehicle speed signal, combined light optical signal, judge current ambient light and the motoring condition of automobile, and the passing light of in good time connection or closing automobile, country beam export.
Described photosensor, Light indicator are connected with control circuit, changed by the light intensity of photosensor or Light indicator, obtain a voltage signal, be input to automatic light controller, automatic light controller, according to the input amplitude of sampled signal, judges the suffered external environment illumination situation of Current vehicle.
Described vehicle speed signal, 3-axis acceleration sensor U3 are connected with control circuit, realize the real-time detection to vehicle climbable gradient.
Described combined light optical signal is connected with control circuit, described control circuit is connected with passing light, country beam by driving circuit, under the pattern that automatic light controller runs automatically, the control to passing light, country beam output state can be realized by combined switch.
Described micro controller system U4 adopts Freescale DZ60 series 8-bit microprocessor.
Described automatic light controller comprises the following steps:
When driving a vehicle by day, the light intensity that the photosensor being installed on instrument desk front portion collects is stronger, input to control circuit voltage signal, control circuit has also collected vehicle speed signal simultaneously, to carry out motoring condition identification, after automobile enters tunnel, dimmed in operator's compartment, the input voltage step-down of photosensor, lamp dimmer opens the passing light of automobile automatically, carries out tunnel and travels illumination.After garage rolls tunnel away from, light intensity is recovered, and lamp dimmer is automatically closed passing light and exported;
The light that photosensor collects die down signal and night travel side-marker lamp signal access time, automatic light controller is identified as night travel state, when there is street lighting in urban district, the Light indicator being arranged on front part of vehicle has detected that street lamp wigwag inputs, automatic light controller can automatic closing automobile country beam, is switched to passing light illumination condition;
When field driving at night, Light indicator can't detect light intensity signal, automatic light controller opens country beam automatically, when travelling front and having light-illuminating, when automatic light controller detects the taillight of the head lamp of opposite vehicle or front truck, automatically switch to passing light illumination condition, after meeting terminates, automatically switch to country beam state;
When night travel, the signal of control circuit meeting Real-time Collection 3-axis acceleration sensor U3, convert current grade signal to, when automatic light controller judges that automobile is in upward slope state, automatically switch to passing light state, when automobile is in descending state, automatic light controller automatically switches to country beam state.
Advantage of the present invention:
As can be seen from above-mentioned steps, the present invention adopts two groups of light-intensity test sensors, photosensor and Light indicator, wherein photosensor is a light intensity detection circuit being installed on instrument desk front portion, for detecting the illuminance in operator's compartment, another street lamp optical sensor, be installed on front part of vehicle, road light and opposite, front vehicle irradiation light light for detecting vehicle front detect, control circuit is according to the incoming signal of this two sensors, can judge the light conditions of Current vehicle, accuracy of detection is high, and condition adjudgement is accurate.The input of vehicle speed signal, automatic light controller is not only the judged light conditions of vehicle, also achieve the motion state detection of vehicle, under the running state of vehicle, 3-axis acceleration sensor U3 exports the acceleration/accel in X, Y, Z tri-directions in real time simultaneously, resolution is high, can detect the dynamic acceleration that vehicle movement produces, by detecting the acceleration/accel on each axle, indirect calculation goes out the inclination angle of vehicle, judge that energy is in flat pavement running or is in climbing, descending state.When driving, automatic light controller is by switching the output state of country beam and passing light automatically to driving states and light intensity change.Alleviate the driving intensity of chaufeur, ensure the safety of driving.
Accompanying drawing explanation
Fig. 1 is the integral structure figure of a kind of automatic light controller of the present invention;
Fig. 2 is control circuit and 3-axis acceleration sensor U3 circuit connection diagram;
Fig. 3 is Light indicator circuit connection diagram;
Fig. 4 is photosensor circuit connection diagram;
Fig. 5 is section driving circuit schematic diagram.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details.
As shown in Figure 1 or 2, a kind of automatic light controller, described automatic light controller comprises control circuit, photosensor, Light indicator, 3-axis acceleration sensor U3, vehicle speed signal, combined light optical signal, driving circuit, passing light, country beam etc., described control circuit comprises the external power supply input circuit be connected with micro controller system U4 input end, crystal oscillating circuit, download program interface circuit, described photosensor, Light indicator, vehicle speed signal, the mouth of combined light optical signal connects the input end of micro controller system U4, described 3-axis acceleration sensor U3 is connected with micro controller system U4 by SPI interface, the mouth of described control circuit connects passing light by driving circuit, country beam.
Described micro controller system U4 adopts Freescale DZ60 series 8-bit microprocessor, can Real-time Collection photosensor, Light indicator, 3-axis acceleration sensor U3, vehicle speed signal, combined light optical signal, voltage signal acquisition, combined switch acquisition of signal, vehicle speed signal collection, 3-axis acceleration sensor U3 intelligence sample can be realized, judge current ambient light and the motoring condition of automobile, and the passing light of in good time connection or closing automobile, country beam export.
As shown in Figure 3, described Light indicator comprises:
One photo-transistor Q1, the collecting electrode of described photo-transistor Q1 connects a VREF (Voltage Reference), and emitter is by a divider resistance R1 ground connection;
One voltage follower U1B, between the emitter that described voltage follower U1B is connected in parallel on described photo-transistor Q1 and divider resistance R1;
The positive input terminal of one voltage amplifier U1A, described voltage amplifier U1A is connected with the mouth of described voltage follower U1B by a resistance R2, and the mouth of described voltage amplifier U1A connects described Freescale single-chip microcomputer U4 input end.
Light indicator signal sampling element be a photo-transistor Q1, Light indicator is installed on the front portion of automobile, the collector current light radiation control of photo-transistor Q1, when photo-transistor Q1 be subject to illumination penetrate time, its internal resistance generation marked change, the resistance of this change causes the voltage on the divider resistance R1 of sample circuit to change, external light intensity is stronger, voltage on R1 is higher, this voltage is by voltage follower U1B, deliver to voltage amplifier U1A to amplify, finally obtain the change voltage that a Freescale single-chip microcomputer U4 is easy to identify.
As shown in Figure 4, described photosensor comprises:
One end of one photoconductive cell R5, described photoconductive cell R5 connects a VREF (Voltage Reference), and the other end is by a sampling resistor R6 ground connection;
One voltage follower U2B, described voltage follower U2B is connected in parallel between described photoconductive cell R5 and sampling resistor R6;
The positive input terminal of one voltage amplifier U2A, described voltage amplifier U2A is connected with the mouth of described voltage follower U2B by a resistance R7, and the mouth of described voltage amplifier U2A connects described Freescale single-chip microcomputer U4 input end.
The circuit of photosensor is identical with the sampling principle of Light indicator, photosensor is installed on the front portion of the indoor instrument desk of vehicle drive, when being subject to illumination in operator's compartment and penetrating, the resistance of photoconductive cell R5 changes, and sampling resistor R6 can obtain a branch pressure voltage, and exterior light is according to stronger, voltage on R6 is higher, this voltage, by voltage follower U2B, is delivered to voltage amplifier U2A and is amplified, and finally obtains the change voltage that a Freescale single-chip microcomputer U4 is easy to identify.
Described driving circuit by 4 independently driver element form, its input end is connected to the output port of micro controller system, mouth is connected to passing light or country beam, be illustrated in figure 5 the driving circuit of light modulation in the vicinity, the control output end of the light modulation in the vicinity mouth OUTA of micro controller system U4 is by resistance R30, be connected to the input end of intelligent control circuit D1, when OUTA is high level, the output port of intelligent control circuit D1 has 24V voltage to export, external passing light is lighted, when OUTA is low level, the voltage of the output port of intelligent control circuit D1 is 0, external dipped beam closes.The output state of external lights can also feed back to micro controller system U4 by the ST pin of D1, is convenient to micro controller system U4 and judges that whether current output state is normal.Other three tunnel of driving circuit exports identical with the output of light modulation in the vicinity, and the control output end mouth of the right passing light of micro controller system, left country beam and right country beam distinguishes OUTB, OUTC, OUTD.
As shown in Figure 2, 3-axis acceleration sensor U3 is three axle digital accelerometers, resolution is high, measurement range can reach ± 16g, it and Freescale single-chip microcomputer U4 are conducted interviews by SPI interface, 3-axis acceleration sensor U3 can measure the accekeration of each axle, because acceleration/accel can not the inclination angle of direct representation object, need to be changed by formula just can obtain inclination value, the control circuit level comprising 3-axis acceleration sensor U3 is installed on automotive interior by us, when automobile and ground level produce pitch angle, 3-axis acceleration sensor U3 can obtain a system of axes, system of axes is projected to the plane of XZ axle, a plane coordinate system can be obtained, thus by calculating, obtain the static acceleration on each axle and pitch angle.Automatic light controller, by the change of current vehicle pitch rate, can judge the running state of vehicle, as flat pavement running, and climbing, descending etc.
Described photosensor, Light indicator are connected with control circuit, changed by the light intensity of photosensor or Light indicator, obtain a voltage signal, be input to automatic light controller, automatic light controller, according to the input amplitude of sampled signal, judges the suffered external environment illumination situation of Current vehicle.
Described vehicle speed signal, 3-axis acceleration sensor U3 are connected with control circuit, realize the real-time detection to vehicle climbable gradient.
Described combined light optical signal, driving circuit are connected with control circuit, under the pattern that automatic light controller runs automatically, can realize the priority acccess control to passing light, country beam output state by combined switch.
Described automatic light controller comprises the following steps:
When driving a vehicle by day, the light intensity that the photosensor being installed on instrument desk front portion collects is stronger, input to control circuit voltage signal, control circuit has also collected vehicle speed signal simultaneously, to carry out motoring condition identification, after automobile enters tunnel, dimmed in operator's compartment, the input voltage step-down of photosensor, the passing light of automobile opened automatically by automatic light controller, carries out tunnel and travels illumination.After garage rolls tunnel away from, light intensity is recovered, and automatic light controller automatically cuts out passing light and exports;
The signal weaker that photosensor collects and night travel side-marker lamp signal access time, automatic light controller is identified as night travel state, when there is street lighting in urban district, the Light indicator being arranged on front part of vehicle has detected that street lamp wigwag inputs, automatic light controller can automatic closing automobile country beam, is switched to passing light illumination condition;
When field driving at night, Light indicator can't detect light intensity signal, automatic light controller opens country beam automatically, when travelling front and having light-illuminating, when automatic light controller detects the taillight of the head lamp of opposite vehicle or front truck, automatically switch to passing light illumination condition, after meeting terminates, automatically switch to country beam state;
When night travel, the signal of control circuit meeting Real-time Collection 3-axis acceleration sensor U3, convert current grade signal to, when automatic light controller judges that automobile is in upward slope state, automatically switch to passing light state, when automobile is in descending state, automatic light controller automatically switches to country beam state.
The above embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determine.
Claims (6)
1. an automatic light controller, it is characterized in that described automatic light controller comprises control circuit, photosensor, Light indicator, 3-axis acceleration sensor U3, vehicle speed signal, combined light optical signal, driving circuit, passing light, country beam etc., described control circuit comprises the external power supply input circuit be connected with micro controller system U4 input end, crystal oscillating circuit, download program interface circuit, described photosensor, Light indicator, vehicle speed signal, the mouth of combined light optical signal connects the input end of micro controller system U4, the mouth of described 3-axis acceleration sensor U3 connects the SPI interface of micro controller system, described control circuit mouth connects passing light by driving circuit, country beam.
2. a kind of automatic light controller according to claim 1, it is characterized in that described automatic light controller can Real-time Collection photosensor, Light indicator, 3-axis acceleration sensor U3, vehicle speed signal, combined light optical signal, judge current ambient light and the motoring condition of automobile, and the passing light of in good time connection or closing automobile, country beam export.
3. a kind of automatic light controller according to claim 1, it is characterized in that described photosensor, Light indicator is connected with control circuit, changed by the light intensity of photosensor or Light indicator, obtain a voltage signal, be input to automatic light controller, automatic light controller, according to the input amplitude of sampled signal, judges the suffered external environment illumination situation of Current vehicle.
4. a kind of automatic light controller according to claim 1, is characterized in that described vehicle speed signal, 3-axis acceleration sensor U3 is connected with control circuit, realize the real-time detection to vehicle climbable gradient.
5. a kind of automatic light controller according to claim 1, it is characterized in that described combined light optical signal is connected with control circuit, described control circuit is connected with passing light, country beam by driving circuit, under the pattern that automatic light controller runs automatically, the control to passing light, country beam output state can be realized by combined switch.
6. a kind of automatic light controller according to claim 1, is characterized in that described micro controller system U4 adopts Freescale DZ60 series 8-bit microprocessor.
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| CN201510112889.7A CN104742796B (en) | 2015-03-13 | 2015-03-13 | A kind of automatic light controller |
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| CN201510112889.7A CN104742796B (en) | 2015-03-13 | 2015-03-13 | A kind of automatic light controller |
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| CN107128242A (en) * | 2016-02-29 | 2017-09-05 | 长城汽车股份有限公司 | The illuminator and its control method of vehicle, vehicle |
| CN107202289A (en) * | 2016-03-18 | 2017-09-26 | 技嘉科技股份有限公司 | Lighting headlamp unit and its control method |
| CN107813778A (en) * | 2017-09-28 | 2018-03-20 | 湖北群泽汽车零部件有限公司 | A kind of multi-functional controller for daytime running light assembly |
| CN108454499A (en) * | 2018-04-16 | 2018-08-28 | 华域视觉科技(上海)有限公司 | A kind of direct current light-modulating motor adjusted for car light automatic horizontal |
| CN111169368A (en) * | 2020-01-16 | 2020-05-19 | 深圳市得盛电子有限公司 | Intelligent control device for automobile light |
| CN112863196A (en) * | 2020-12-30 | 2021-05-28 | 中山大学 | Photovoltaic panel-based vehicle detection device capable of automatically supplying power |
| CN112937423A (en) * | 2021-03-11 | 2021-06-11 | 重庆长安汽车股份有限公司 | Height adjusting method of self-adaptive front lighting system |
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| CN112937423A (en) * | 2021-03-11 | 2021-06-11 | 重庆长安汽车股份有限公司 | Height adjusting method of self-adaptive front lighting system |
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