CN205305209U - Vehicle headlamps control circuit - Google Patents
Vehicle headlamps control circuit Download PDFInfo
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- CN205305209U CN205305209U CN201620047777.8U CN201620047777U CN205305209U CN 205305209 U CN205305209 U CN 205305209U CN 201620047777 U CN201620047777 U CN 201620047777U CN 205305209 U CN205305209 U CN 205305209U
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Abstract
The utility model provides a vehicle headlamps control circuit, includes power supply circuit, CAN communication circuit, photosensitive circuit, analog to digital conversion circuit, main control unit circuit, output control circuit. Photosensitive circuit and external environment optical contact produce an analog voltage signal, and rethread analog to digital conversion circuit converts data signal to and offers the main control unit circuit, CAN communication circuit receives the order that car body control module sent, the main control unit circuit is realized communicating by letter with car body control module under the control of inside software program, control analog to digital conversion circuit and output control circuit, output control circuit controls vehicle headlamps's operating voltage. The beneficial effects of the utility model are that open and the switching -off control point of head -light can carry out random setting according to driver's requirement, and the illumination intensity of head -light can adjust wantonly in the intention according to the driver according to the go difference of environment of automobile, has degree of automation height, the high characteristics of strong, the humanized degree of environment adaptive.
Description
Technical field
This utility model relates to light automatic control technology field, in particular it relates to a kind of vehicle front lighting lamp control circuit.
Background technology
At present, on automobile, the headlamp control circuit of application mainly has two ways, and one is manual control mode, and this control mode is that driver is operated by light control switch car bulb is controlled; Another mode is automatic control mode, and this control mode is one light-sensitive element of addition in control circuit, is carried out the intensity of perception ambient by light-sensitive element, further according to the opening and closedown of strength control headlamp of light. The mode that the second automatically controls has the advantages that automated procedures are high, easy to use, is currently mainly applied to top-of-the-range version or height is joined in vehicle, and has the trend replacing manual control mode. But it is applied in the automatic control mode on automobile at present, it just sets before automobile dispatches from the factory according to the control point opened with close of ambient strength control headlamp, driver cannot change, due to the reasons such as the driver sight certain difference that defined to ambient light light and shade, so may result in the moment turned on light cannot meet the demand of driver sometimes. It addition, opening of car bulb can only be controlled by existing vehicle front lighting lamp control circuit with closedown, it is impossible to intensity of illumination is adjusted, when running car is when different environment, often to intensity of illumination to need be different. Therefore, find a kind of lamp with auto-switch control point can arrange according to the intention driven, circuit that headlamp lamp intensity of illumination can arbitrarily regulate, existing automobile headlamp light control circuit is improved and is a need for.
Utility model content
For the above-mentioned deficiency of existing vehicle front lighting lamp control circuit, this utility model solves the technical problem that it is the design vehicle front lighting lamp control circuit that a kind of lamp with auto-switch control point can be arranged according to driver intention, headlamp intensity of light can arbitrarily regulate.
Solve this technical problem and be the technical scheme is that
A kind of vehicle front lighting lamp control circuit, including power circuit, CAN communication circuit, photosensitive circuit, analog to digital conversion circuit, main controller circuit, output control circuit.
Power circuit external automobile accumulator, the outfan of power circuit connects photosensitive circuit, analog to digital conversion circuit, main controller circuit, output control circuit respectively; The input of CAN communication circuit is connected with main controller circuit, the outfan external automobile car body control module of CAN communication circuit; Photosensitive circuit contacts with extraneous environment light; The outfan external automobile headlamp of output control circuit.
Power circuit is photosensitive circuit, analog to digital conversion circuit, main controller circuit, output control circuit provide electric energy.
Photosensitive circuit utilizes the intensity of photoconductive resistance perception environment light, produces an analog voltage signal becoming reverse linear to change with environment light and is supplied to analog to digital conversion circuit.
Analog to digital conversion circuit converts the analog voltage signal that photosensitive circuit provides to digital signal and is supplied to main controller circuit.
CAN communication circuit receives the order that automobile body control module sends, and converts the level signal that single-chip microcomputer is capable of identify that to and is supplied to main controller circuit.
Main controller circuit is under the control of in house software program, the ambient light intensity signal of analog to digital conversion circuit offer and the control command of the automobile body control module of CAN communication circuit offer are provided, and the digital controlled signal exporting a control headlamp intensity of illumination is supplied to output control circuit, control command is sent to main controller circuit after being arranged at the lamp with auto-switch control point being suitable for oneself by driver by car body control module, main controller circuit is compared further according to intensity and this order of environment light, behind the control point that luminous environment light is arranged less than driver just automatically one digital controlled signal of output to output control circuit, thus realizing the function that lamp with auto-switch control point can be arranged according to the intention driven.
Output control circuit utilizes D/A converting circuit to convert the digital controlled signal that main controller circuit provides to analog voltage signal, and utilize this analog voltage signal to control the conducting degree of field effect transistor, again through field effect transistor, the running voltage of car headlamp is controlled, under the control of this voltage, the headlamp intensity of illumination of automobile will change, this running voltage is to control output control circuit by main controller circuit after driver regulates to realize, it is achieved thereby that the function that headlamp intensity of illumination can arbitrarily regulate.
The beneficial effects of the utility model:
The opening and closing control point of headlamp, random setting can be carried out according to the requirement of driver, the intensity of illumination of headlamp can according to the difference of running car environment, arbitrarily regulate in the intention according to driver, there is automaticity height, environment self-adaption is strong, hommization degree is high feature.
Accompanying drawing explanation
Fig. 1 is this utility model theory diagram;
Fig. 2 is power circuit principle figure;
Fig. 3 is CAN communication circuit theory diagrams;
Fig. 4 is photosensitive circuit schematic diagram;
Fig. 5 is analog to digital conversion circuit schematic diagram;
Fig. 6 is main controller circuit schematic diagram;
Fig. 7 is output control circuit schematic diagram;
Wherein: 1-circuit, 2-CAN telecommunication circuit, 3-photosensitive circuit, 4-analog to digital conversion circuit, 5-main controller circuit, 6-output control circuit.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, this utility model is described further.
As it is shown in figure 1, this utility model one vehicle front lighting lamp control circuit, it is made up of power circuit 1, CAN communication circuit 2, photosensitive circuit 3, analog to digital conversion circuit 4, main controller circuit 5, output control circuit 6.
Power circuit 1 as shown in Figure 2 includes battery feed input interface, filter capacitor, decoupling capacitance, three terminal regulator, battery feed input interface external automobile accumulator, the input of three terminal regulator MC7805 is connected with battery feed input interface, the input of three terminal regulator ASM1117-2.5 is connected with the outfan of three terminal regulator MC7805, the positive pole of 3 filter capacitors C14, C16, C20 is connected on+12V ,+5V ,+2.5V, and its negative pole is all connected to the ground. This circuit is that photosensitive circuit 3 provides stable+12V DC voltage, stable+12V ,+5V ,+2.5V DC voltage is provided for analog to digital conversion circuit 4, there is provided stable+5V DC voltage for main controller circuit 5, provide stable+5V DC voltage for output control circuit 6.
CAN communication circuit 2 shown in Fig. 3 includes CAN controller TJA1050, decoupling capacitance, end resistance, EBI, 1st foot of CAN controller TJA1050 and the 4th foot are connected with the single-chip microcomputer of main controller circuit respectively, 6th foot of CAN controller TJA1050 and the 7th foot are connected with EBI P2 respectively, and end resistance is connected between the 6th foot and the 7th foot of CAN controller TJA1050. This circuit receives the order that automobile body control module sends, and converts the level signal that single-chip microcomputer is capable of identify that to and is supplied to main controller circuit 5.
Photosensitive circuit 3 shown in Fig. 4 includes current-limiting resistance, accurate regulated power supply, sample resistance, filter capacitor, divider resistance, regulator potentiometer, photoconductive resistance, resistance R6, resistance R7, resistance R8, potentiometer RW2, filter capacitor C2, filter capacitor C3, accurate regulated power supply U2 constitutes tabilized current power supply, the constant current of 10 microamperes is provided for photoconductive resistance, one end of photoconductive resistance is connected with resistance R7, other end is connected with resistance R8, the function of this circuit is the intensity utilizing photoconductive resistance perception environment light, produce an analog voltage signal becoming reverse linear to change with environment light and be supplied to analog to digital conversion circuit 4.
Analog to digital conversion circuit 4 shown in Fig. 5 includes current-limiting resistance, accurate regulated power supply, sample resistance, filter capacitor, regulator potentiometer, decoupling capacitance, analog-digital converter, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, electric capacity C24, regulator potentiometer RW4, accurate regulated power supply U10 constitute reference voltage power supply circuits, and this circuit provides stable adjustable reference voltage for analog-digital converter U3; Analog-digital converter U3, electric capacity C7, electric capacity C8, electric capacity C9 constitute analog to digital conversion circuit, the input end of analog signal of analog-digital converter U3 is connected with the output of photosensitive circuit 3, the Interface for digital communication of analog-digital converter U3 is connected with main controller circuit 5, and the function of this circuit is to convert the analog voltage signal that photosensitive circuit provides to digital signal to be supplied to main controller circuit 5.
Main controller circuit 5 shown in Fig. 6 includes single-chip microcomputer, download interface, reset resistor, decoupling capacitance, and download interface is downloaded mouth with the ISP of Chip Microcomputer A tiny40 and is connected, and its function has been the download of Single Chip Microcomputer (SCM) program; One end of reset resistor is connected with+5V power supply, other end is connected with the resetting pin of single-chip microcomputer, and its function is to provide reset level signal at powered on moment for single-chip microcomputer; The universal input output pin of Chip Microcomputer A tiny40 is connected with CAN communication circuit 2, analog to digital conversion circuit 4, output control circuit 6 respectively; The function of this circuit is to communicate with automobile body control module under the control of in house software program, control analog to digital conversion circuit 4 and the analogue signal of photosensitive circuit 3 is converted to digital signal, control output control circuit 6 and car headlamp is carried out the adjustment of on-off control and intensity of illumination.
Output control circuit 6 shown in Fig. 7 includes current-limiting resistance, accurate regulated power supply, sample resistance, filter capacitor, regulator potentiometer, decoupling capacitance, digital to analog converter, integrated transporting discharging, field effect transistor, current-limiting resistance, car headlamp interface, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, electric capacity C1, regulator potentiometer RW1, accurate regulated power supply U1 constitute reference voltage power supply circuits, and these reference voltage power supply circuits provide stable adjustable reference voltage for digital to analog converter U4; The Interface for digital communication of digital to analog converter U4 is connected with main controller circuit 5, its analog voltage outfan is connected with the in-phase input end of integrated transporting discharging; Integrated transporting discharging U5, zero potentiometer RW3 constitute voltage follower, and the outfan of integrated transporting discharging U6 is connected with the current-limiting resistance R9 of field effect transistor, and the function of this voltage follower is to improve the load capacity of digital to analog converter, play the effect of buffering; Field effect transistor Q1, current-limiting resistance R9, filter capacitor C10, car headlamp interface P1 constitute headlamp and control and voltage-regulating circuit, the grid of field application pipe is connected with one end of current-limiting resistance R9, its source electrode is connected to the ground, its drain electrode is connected with one end of car headlamp interface P1, and this headlamp controls and the function of voltage-regulating circuit is to convert analog voltage signal to by digital to analog converter U4 under the control of main controller circuit 5 to control the conducting degree of field effect transistor, again through field effect transistor, the running voltage of car headlamp is controlled.
Although being described in conjunction with the accompanying embodiment of the present utility model, but those of ordinary skill in the art can make various deformation or amendment within the scope of the appended claims.
Claims (7)
1. a vehicle front lighting lamp control circuit, it is characterised in that include power circuit, CAN communication circuit and the photosensitive circuit being linked in sequence successively, analog to digital conversion circuit, main controller circuit, output control circuit;
Described power circuit external automobile accumulator, the outfan of power circuit connects photosensitive circuit, analog to digital conversion circuit, main controller circuit, output control circuit respectively; The input of described CAN communication circuit is connected with main controller circuit, the outfan external automobile car body control module of CAN communication circuit; Described photosensitive circuit contacts with extraneous environment light; The outfan external automobile headlamp of described output control circuit;
Described power circuit is photosensitive circuit, analog to digital conversion circuit, main controller circuit, output control circuit provide electric energy;
Described photosensitive circuit utilizes the intensity of photoconductive resistance perception environment light, produces an analog voltage signal becoming reverse linear to change with environment light and is supplied to analog to digital conversion circuit;
Analog-digital conversion circuit as described converts the analog voltage signal that photosensitive circuit provides to digital signal and is supplied to main controller circuit;
Described CAN communication circuit receives the order that automobile body control module sends, and converts the level signal that single-chip microcomputer is capable of identify that to and is supplied to main controller circuit;
Described main controller circuit is under the control of in house software program, the ambient light intensity signal of analog to digital conversion circuit offer and the control command of the automobile body control module of CAN communication circuit offer are provided, and the digital controlled signal exporting a control headlamp intensity of illumination is supplied to output control circuit;
Described output control circuit utilizes D/A converting circuit to convert the digital controlled signal that main controller circuit provides to analog voltage signal, and utilize this analog voltage signal to control the conducting degree of field effect transistor, again through field effect transistor, the running voltage of car headlamp is controlled.
2. vehicle front lighting lamp control circuit as claimed in claim 1, it is characterized in that, described power circuit includes battery feed input interface, filter capacitor, decoupling capacitance, three terminal regulator, battery feed input interface external automobile accumulator, the input of three terminal regulator MC7805 is connected with battery feed input interface, the input of three terminal regulator ASM1117-2.5 is connected with the outfan of three terminal regulator MC7805, 3 filter capacitor C14, C16, the positive pole of C20 is connected to+12V, + 5V, on+2.5V, its negative pole is all connected to the ground, this circuit is that photosensitive circuit provides stable+12V DC voltage, stable+12V is provided for analog to digital conversion circuit, + 5V, + 2.5V DC voltage, stable+5V DC voltage is provided for main controller circuit, stable+5V DC voltage is provided for output control circuit.
3. vehicle front lighting lamp control circuit as claimed in claim 1, it is characterized in that, described CAN communication circuit includes CAN controller TJA1050, decoupling capacitance, end resistance, EBI, 1st foot of CAN controller TJA1050 and the 4th foot are connected with the single-chip microcomputer of main controller circuit respectively, 6th foot of CAN controller TJA1050 and the 7th foot are connected with EBI P2 respectively, end resistance is connected between the 6th foot and the 7th foot of CAN controller TJA1050, this circuit receives the order that automobile body control module sends, convert the level signal that single-chip microcomputer is capable of identify that to and be supplied to main controller circuit.
4. vehicle front lighting lamp control circuit as claimed in claim 1, it is characterized in that, described photosensitive circuit includes current-limiting resistance, accurate regulated power supply, sample resistance, filter capacitor, divider resistance, regulator potentiometer, photoconductive resistance, resistance R6, resistance R7, resistance R8, potentiometer RW2, filter capacitor C2, filter capacitor C3, accurate regulated power supply U2 constitutes tabilized current power supply, the constant current of 10 microamperes is provided for photoconductive resistance, one end of photoconductive resistance is connected with resistance R7, other end is connected with resistance R8, the function of this circuit is the intensity utilizing photoconductive resistance perception environment light, produce an analog voltage signal becoming reverse linear to change with environment light and be supplied to analog to digital conversion circuit (4).
5. vehicle front lighting lamp control circuit as claimed in claim 1, it is characterized in that, analog-digital conversion circuit as described includes current-limiting resistance, accurate regulated power supply, sample resistance, filter capacitor, regulator potentiometer, decoupling capacitance, analog-digital converter, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, electric capacity C24, regulator potentiometer RW4, accurate regulated power supply U10 constitutes reference voltage power supply circuits, this circuit provides stable adjustable reference voltage for analog-digital converter U3, analog-digital converter U3, electric capacity C7, electric capacity C8, electric capacity C9 constitutes analog to digital conversion circuit, the input end of analog signal of analog-digital converter U3 is connected with the output of photosensitive circuit, the Interface for digital communication of analog-digital converter U3 is connected with main controller circuit, the function of this circuit is to convert the analog voltage signal that photosensitive circuit provides to digital signal to be supplied to main controller circuit.
6. vehicle front lighting lamp control circuit as claimed in claim 1, it is characterized in that, described main controller circuit includes single-chip microcomputer, download interface, reset resistor, decoupling capacitance, download interface is downloaded mouth with the ISP of Chip Microcomputer A tiny40 and is connected, one end of reset resistor is connected with+5V power supply, other end is connected with the resetting pin of single-chip microcomputer, the universal input output pin of Chip Microcomputer A tiny40 respectively with CAN communication circuit, analog to digital conversion circuit, output control circuit is connected, the function of this circuit is to communicate with automobile body control module under the control of in house software program, control analog to digital conversion circuit and convert the analogue signal of photosensitive circuit to digital signal, control output control circuit and car headlamp is carried out the adjustment of on-off control and intensity of illumination.
7. vehicle front lighting lamp control circuit as claimed in claim 1, it is characterised in that described output control circuit includes current-limiting resistance, accurate regulated power supply, sample resistance, filter capacitor, regulator potentiometer, decoupling capacitance, digital to analog converter, integrated transporting discharging, field effect transistor, current-limiting resistance, car headlamp interface, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, electric capacity C1, regulator potentiometer RW1, accurate regulated power supply U1 constitutes reference voltage power supply circuits, and these reference voltage power supply circuits provide stable adjustable reference voltage for digital to analog converter U4, and the Interface for digital communication of digital to analog converter U4 is connected with main controller circuit, its analog voltage outfan is connected with the in-phase input end of integrated transporting discharging, integrated transporting discharging U5, zero potentiometer RW3 constitutes voltage follower, and the outfan of integrated transporting discharging U6 is connected with the current-limiting resistance R9 of field effect transistor, and the function of this voltage follower is to improve the load capacity of digital to analog converter, play the effect of buffering, field effect transistor Q1, current-limiting resistance R9, filter capacitor C10, car headlamp interface P1 constitutes headlamp and controls and voltage-regulating circuit, and the grid of field application pipe is connected with one end of current-limiting resistance R9, its source electrode is connected to the ground, its drain electrode is connected with one end of car headlamp interface P1, and this headlamp controls and the function of voltage-regulating circuit is to convert analog voltage signal to by digital to analog converter U4 under the control of main controller circuit to control the conducting degree of field effect transistor, again through field effect transistor, the running voltage of car headlamp is controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620047777.8U CN205305209U (en) | 2016-01-11 | 2016-01-11 | Vehicle headlamps control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620047777.8U CN205305209U (en) | 2016-01-11 | 2016-01-11 | Vehicle headlamps control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205305209U true CN205305209U (en) | 2016-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620047777.8U Expired - Fee Related CN205305209U (en) | 2016-01-11 | 2016-01-11 | Vehicle headlamps control circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN205305209U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109716864A (en) * | 2016-11-07 | 2019-05-03 | 宝马股份公司 | Method for the lighting device and lighting system of motor vehicle and for running motor vehicle lighting system |
| CN111679709A (en) * | 2020-06-16 | 2020-09-18 | 武汉光迅科技股份有限公司 | Voltage generating circuit and method |
-
2016
- 2016-01-11 CN CN201620047777.8U patent/CN205305209U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109716864A (en) * | 2016-11-07 | 2019-05-03 | 宝马股份公司 | Method for the lighting device and lighting system of motor vehicle and for running motor vehicle lighting system |
| US11259375B2 (en) | 2016-11-07 | 2022-02-22 | Bayerische Motoren Werke Aktiengesellschaft | Lighting device and lighting system for a motor vehicle and method for operating a lighting system for a motor vehicle |
| CN111679709A (en) * | 2020-06-16 | 2020-09-18 | 武汉光迅科技股份有限公司 | Voltage generating circuit and method |
| CN111679709B (en) * | 2020-06-16 | 2022-03-11 | 武汉光迅科技股份有限公司 | Voltage generating circuit and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160608 Termination date: 20170111 |