CN115334717A - Car light intelligent control circuit based on photoelectric coupler - Google Patents
Car light intelligent control circuit based on photoelectric coupler Download PDFInfo
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- CN115334717A CN115334717A CN202211251341.7A CN202211251341A CN115334717A CN 115334717 A CN115334717 A CN 115334717A CN 202211251341 A CN202211251341 A CN 202211251341A CN 115334717 A CN115334717 A CN 115334717A
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/345—Current stabilisation; Maintaining constant current
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J6/00—Arrangement of optical signalling or lighting devices on cycles; Mounting or supporting thereof; Circuits therefor
- B62J6/01—Electric circuits
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J6/00—Arrangement of optical signalling or lighting devices on cycles; Mounting or supporting thereof; Circuits therefor
- B62J6/02—Headlights
- B62J6/022—Headlights specially adapted for motorcycles or the like
- B62J6/024—Switching between high and low beam
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/36—Circuits for reducing or suppressing harmonics, ripples or electromagnetic interferences [EMI]
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
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- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
The invention discloses an intelligent control circuit of a car lamp based on a photoelectric coupler, which comprises a port protection circuit, an electromagnetic interference suppression circuit, a logic control circuit, a constant current driving circuit and a near-far light control circuit, wherein the logic circuit control formed by the photoelectric coupler is utilized to control the starting of a driving chip, the output of bus voltage and the switching of far light and near light by judging the state of 5-wire input, so that the high light can be preferentially flicked when passing is flicked, the low light is controlled by a light sensing signal when a position light is started, the normal switching of the high light and the near light is realized, the low light is forcibly lightened when a headlight switch is started, and the high light and the low light are normally switched. The invention gets rid of the control of a single chip microcomputer and software, improves the response speed and the anti-interference capability by pure hardware, improves the reliability of the system, enables the lamp to be intelligentized, reduces the function of 6-wire input into 5-wire input, reduces the wiring of the whole vehicle and reduces the cost.
Description
Technical Field
The invention relates to the technical field of intelligent control of LED car lamps, in particular to an intelligent car lamp control circuit based on a photoelectric coupler.
Background
The headlamp of the electric vehicle is an important part for ensuring the safe running of the electric vehicle. With the development of electronic technology, LED headlamps need to be more intelligent to meet the needs of the rider. When the night comes, the illumination is reduced, the switch is arranged at an automatic gear, and the dipped headlight needs to be automatically turned on; when a rider needs to turn on the headlight during normal driving, the switch is arranged at a headlight gear, and the headlight needs to turn on the dipped headlight forcibly; when any situation needs overtaking, the high beam needs to be lighted. When the dipped headlight is turned on, the distance light and the near light can be switched at any time to protect the safety of passers-by and riders.
The LED electric vehicle headlamp is developed and rapid in recent years, and has the advantages of energy conservation, environmental protection, long service life, high brightness, high response speed and the like. The traditional LED electric vehicle headlamp adopts two groups of driving circuits, utilizes a single chip microcomputer and software control thereof, meets various functions through interface sampling input and software logic, and has poor anti-interference capability, slow response speed and high cost; the LED constant-current driving circuit is adopted for driving, the LED constant-current driving circuit is powered on and then is turned on, the functions of automatic headlight and overtaking spot flashing cannot be realized, and the multifunctional requirement of the LED car light cannot be met.
Chinese patent publication No. CN104175946B discloses a control circuit for changing distance light and near light of a headlamp of an LED vehicle, which adopts a driving circuit to complete the control of the distance light and the near light, and changes the magnitude of voltage signals fed back to the driving circuit by changing the resistance of a sampling resistor, thereby influencing the driving circuit to output different driving currents and further achieving the purpose of outputting different light intensities. The high beam and the low beam are switched to change the brightness of all LEDs, the function is single, and the intelligent requirement of the headlamp cannot be realized.
Disclosure of Invention
The invention aims to solve the technical problems and provides an intelligent control circuit of a vehicle lamp based on a photoelectric coupler.
In order to achieve the technical purpose and achieve the technical requirements, the invention adopts the technical scheme that: car light intelligent control circuit based on optoelectronic coupler, its characterized in that: the port protection circuit, the electromagnetic interference suppression circuit, the constant current driving circuit and the near-far light control circuit are sequentially connected, and the logic control circuit is connected with the constant current driving circuit; the port protection circuit comprises a first port protection circuit and a second port protection circuit, one end of the first port protection circuit is connected with the high beam light line Y +, the other end of the first port protection circuit is connected with the ground wire V-, one end of the second port protection circuit is connected with the position light line W +, and the other end of the second port protection circuit is connected with the ground wire V-;
the electromagnetic interference suppression circuit comprises an inductor L3, one end of the inductor L3 is connected with a diode D2 and then is connected with a position lamp wire W +, and the other end of the inductor L3 is connected with an inductor L1 and then is connected with a constant current driving circuit;
the constant current driving circuit comprises a chip U1 and an inductor L2, one end of the inductor L2 is connected with the inductor L1, the other end of the inductor L2 is connected with a voltage stabilizing diode D8 and then connected with the high beam LED2, one end of the high beam LED2 is connected with a voltage stabilizing diode D13 and then connected with the near-far beam control circuit, and the other end of the high beam LED2 is connected with a dipped headlight LED3;
the near-far light control circuit comprises a photoelectric coupler U3, a pin 1 of the photoelectric coupler U3 is connected with a resistor R39 and a diode D7 and then is connected with a far-light lamp wire Y +, a pin 4 of the photoelectric coupler U3 is connected with a field-effect tube Q4 and a resistor R37, the resistor R37 is connected with one end of an inductor L1, and a drain electrode of the field-effect tube Q4 is connected with a resistor R33 and then is connected with a voltage-stabilizing diode D13;
the logic control circuit comprises a photoelectric coupler U2, a pin No. 12, a pin No. 14 and a pin No. 16 of the photoelectric coupler U2 are respectively connected with a grid electrode of a field-effect tube Q3, a pin No. 15 of the photoelectric coupler U2 is connected with a source electrode of the field-effect tube Q3, a drain electrode of the field-effect tube Q3 is connected with a pin No. 8 of a chip U1, and a grid electrode of the field-effect tube Q3 is connected with one end of an inductor L1 after being connected with a resistor R24.
Preferably: the first port protection circuit comprises a resistor R16, a capacitor C21 and a diode D12 which are connected in parallel, and the second port protection circuit comprises a resistor R13, a capacitor C10 and a diode D11 which are connected in parallel.
Preferably: one end of the inductor L3 is grounded in parallel with the capacitor C19 through the capacitor C20, the other end of the inductor L3 is grounded in parallel with the capacitor C12 through the capacitor C11, and a connecting circuit of the inductor L1 and the inductor L2 is grounded in parallel through the capacitor C14, the capacitor C15, the capacitor C16, the capacitor C17 and the resistor R7.
Preferably: the pin No. 1 of the chip U1 is connected with a capacitor C4 and then grounded, the pin No. 2 of the chip U1 is connected with a capacitor C18 and a resistor R8, the resistor R8 is connected with a capacitor C24 and then grounded, a circuit between the resistor R8 and the capacitor C24 is connected with a diode D14, the pin No. 3 of the chip U1 is connected with a resistor R17, the other end of the resistor R17 is connected with the capacitor C24, the pin No. 8 of the chip U1 is connected with a capacitor C25 and then grounded, the pin No. 16 of the chip U1 is connected with a capacitor C26 and then grounded, the pin No. 4 of the chip U1 is connected with a capacitor C27 and then grounded, the pin No. 6 of the chip U1 is connected with a capacitor C28 and then grounded, the pin No. 7 of the chip U1 is connected with a resistor R22 and then grounded, and the pin No. 11 of the chip U1 is connected with a dipped headlight LED3, a pin 10 of the chip U1 is connected with a resistor R18 and then connected with a dipped headlight LED3, the resistor R18 is connected with a resistor R15 and a resistor R14 in parallel, a pin 9 of the chip U1 is connected with a resistor R3 and a resistor R10, the other end of the resistor R3 is connected with a high beam LED2, a pin 13 of the chip U1 is connected with a resistor R6 and a capacitor C13, the other end of the resistor R6 is connected with a source level of a field effect tube Q1, the circuit is also connected with a resistor R11 and a resistor R12, the other end of the capacitor C13 is connected with the capacitor C6 and then connected with the high beam LED2, a pin 15 of the chip U1 is connected with a resistor R4, the other end of the resistor R4 is connected with a grid of the field effect tube Q1, a resistor R5 is connected between the grid of the field effect tube Q1 and the source level in parallel, and a drain electrode of the field effect tube Q1 is connected with one end of a voltage stabilizing diode D8; one end of the voltage stabilizing diode D13 is connected with a source electrode of the field effect transistor Q2, the other end of the voltage stabilizing diode D13 is connected with a grid electrode of the field effect transistor Q2, two ends of the voltage stabilizing diode D13 are connected with a capacitor C23 and a resistor R20 in parallel, and a capacitor C22 is connected between a drain electrode and the grid electrode of the field effect transistor Q2 in parallel.
Preferably: no. 2 pin of the photoelectric coupler U3 is connected with a resistor R44 and then grounded, a capacitor C36 and a resistor R41 are connected in parallel between No. 1 pin and No. 2 pin of the photoelectric coupler U3, and a capacitor C35, a resistor R40 and a voltage stabilizing diode D17 are connected in parallel between No. 3 pin and No. 4 pin of the photoelectric coupler U3.
Preferably: the No. 1 pin of the photoelectric coupler U2 is connected with a resistor R23 and then connected with a position lamp wire W +, the No. 2 pin of the photoelectric coupler U2 is connected with a resistor R27 and a diode D15 and then connected with a light sensing wire, the No. 3 pin of the photoelectric coupler U2 is connected with a resistor R28 and a diode D6 and then connected with a dipped headlight wire J +, the No. 4 pin of the photoelectric coupler U2 is connected with a resistor R3 and then connected with a ground wire V-, the No. 5 pin of the photoelectric coupler U2 is connected with one end of a diode D7 and then connected with a resistor R34 and then connected with a ground wire V-, the No. 7 pin of the photoelectric coupler U2 is connected with one end of a resistor R23 and then connected with a resistor R38 and then connected with one end of a diode D15, pin 9, pin 11 and pin 13 of the photoelectric coupler U2 are connected with a grid of a field effect tube Q3 after being connected with a capacitor C30 respectively, a resistor R26 and a voltage stabilizing diode D16 are connected in parallel between the grid and a source of the field effect tube Q3, pin 10 of the photoelectric coupler U2 is connected with a resistor R42, the other end of the resistor R42 is connected with a capacitor C34, a field effect tube Q5, a resistor R43 and a voltage stabilizing diode D18, the other end of the capacitor C34 is connected with a diode D10 and then is connected with a dipped headlight line J +, two ends of the diode D10 are connected with a diode D9 in parallel, the other end of the voltage stabilizing diode D18 is connected with one end of the diode D2, and two ends of the voltage stabilizing diode D18 are connected with a capacitor C37 in parallel.
Preferably: a resistor R25 and a capacitor C29 are connected in parallel between the No. 1 pin and the No. 2 pin of the photoelectric coupler U2, a resistor R29 and a capacitor C31 are connected in parallel between the No. 3 pin and the No. 4 pin of the photoelectric coupler U2, a resistor R32 and a capacitor C32 are connected in parallel between the No. 5 pin and the No. 6 pin of the photoelectric coupler U2, and a resistor R36 and a capacitor C33 are connected in parallel between the No. 7 pin and the No. 8 pin of the photoelectric coupler U2.
Compared with the traditional structure, the invention has the beneficial effects that:
1. the invention has reasonable design, strong anti-interference capability and fast response speed. The control of the automatic headlamp is realized by a logic circuit formed by photoelectric couplers, the control of a single chip microcomputer and software is eliminated, the response speed and the anti-interference capability are improved by pure hardware, the reliability of a system is improved, the dependence of a lamp on a single chip microcomputer chip is reduced, and the cost is reduced.
2. The invention makes the lamp more intelligent, and can realize the preferential flashing of the high beam when overtaking spot flashing; when the position light is turned on, the near light is controlled by the light sensation signal, and the far light and the near light realize normal switching; when the headlight switch is turned on, the dipped beam is forced to light up, and the high beam and the low beam are normally switched.
3. The invention utilizes the control circuit to control the near and far light switching, reduces the function of 6-line input into 5 lines (position light line, far light line, near light line, light sensing line and ground wire), reduces a group of driving circuits, can control the starting of a driving chip, the output of bus voltage and the switching of the far and near light by judging the state of 5-line input, reduces the wiring of the whole vehicle and reduces the wiring cost.
4. The photoelectric coupler adopting integrated packaging has strong anti-interference capability, saves the circuit area and reduces the cost.
Drawings
FIG. 1 is a circuit block diagram of the present invention;
FIG. 2 is a logic diagram of the implementation of the forward control headlamp of the present invention;
FIG. 3 is a schematic diagram of the circuit structure of the input terminal of the front control headlamp according to the present invention;
FIG. 4 is a circuit diagram of the port protection and EMI suppression of the present invention;
FIG. 5 is a circuit diagram of the constant current driving circuit of the present invention;
FIG. 6 is a circuit diagram of a high beam and low beam control circuit according to the present invention;
FIG. 7 is a logic control circuit diagram of the present invention.
In the figure: 1. the circuit comprises a first port protection circuit, a second port protection circuit and an electromagnetic interference suppression circuit.
Detailed Description
The present invention is further described below.
Referring to the attached drawings, the intelligent control circuit of the car lamp based on the photoelectric coupler is characterized in that: the port protection circuit, the electromagnetic interference suppression circuit 3, the constant current drive circuit and the near-far light control circuit are sequentially connected, and the logic control circuit is connected with the constant current drive circuit; the port protection circuit comprises a first port protection circuit 1 and a second port protection circuit 2, one end of the first port protection circuit 1 is connected with a high beam light line Y +, the other end of the first port protection circuit is connected with a ground line V-, one end of the second port protection circuit 2 is connected with a position light line W +, and the other end of the second port protection circuit is connected with the ground line V-; a diode D1 and a position lamp LED1 are connected in series on the position lamp wire W +, and a capacitor C1 and a resistor C1 are connected in parallel at two ends of the position lamp LED 1;
the electromagnetic interference suppression circuit 3 comprises an inductor L3, one end of the inductor L3 is connected with the position lamp wire W + after being connected with a diode D2, and the other end of the inductor L3 is connected with the constant current driving circuit after being connected with an inductor L1;
the constant current driving circuit comprises a chip U1 and an inductor L2, one end of the inductor L2 is connected with the inductor L1, the other end of the inductor L2 is connected with a voltage stabilizing diode D8 and then connected with the high beam LED2, one end of the high beam LED2 is connected with a voltage stabilizing diode D13 and then connected with the near-far beam control circuit, and the other end of the high beam LED2 is connected with a dipped headlight LED3;
the near-far light control circuit comprises a photoelectric coupler U3, a pin 1 of the photoelectric coupler U3 is connected with a resistor R39 and a diode D7 and then is connected with a far-light lamp wire Y +, a pin 4 of the photoelectric coupler U3 is connected with a field-effect tube Q4 and a resistor R37, the resistor R37 is connected with one end of an inductor L1, and a drain electrode of the field-effect tube Q4 is connected with a resistor R33 and then is connected with a voltage-stabilizing diode D13;
the logic control circuit comprises a photoelectric coupler U2, a pin No. 12, a pin No. 14 and a pin No. 16 of the photoelectric coupler U2 are respectively connected with a grid electrode of a field-effect tube Q3, a pin No. 15 of the photoelectric coupler U2 is connected with a source electrode of the field-effect tube Q3, a drain electrode of the field-effect tube Q3 is connected with a pin No. 8 of a chip U1, and a grid electrode of the field-effect tube Q3 is connected with one end of an inductor L1 after being connected with a resistor R24.
In this preferred embodiment, the first port protection circuit 1 includes a resistor R16, a capacitor C21, and a diode D12 connected in parallel, and the second port protection circuit 2 includes a resistor R13, a capacitor C10, and a diode D11 connected in parallel.
In this preferred embodiment, one end of the inductor L3 is grounded in parallel with the capacitor C19 through the capacitor C20, the other end is grounded in parallel with the capacitor C12 through the capacitor C11, and a connection circuit between the inductor L1 and the inductor L2 is grounded in parallel through the capacitor C14, the capacitor C15, the capacitor C16, the capacitor C17, and the resistor R7.
In the preferred embodiment, pin 1 of the chip U1 is grounded after being connected with a capacitor C4, pin 2 of the chip U1 is connected with a capacitor C18 and a resistor R8, the resistor R8 is grounded after being connected with a capacitor C24, a diode D14 is connected on a circuit between the resistor R8 and the capacitor C24, pin 3 of the chip U1 is connected with a resistor R17, the other end of the resistor R17 is connected with the capacitor C24, pin 8 of the chip U1 is grounded after being connected with a capacitor C25, pin 16 of the chip U1 is grounded after being connected with a capacitor C26, pin 4 of the chip U1 is grounded after being connected with a capacitor C27, pin 6 of the chip U1 is grounded after being connected with a capacitor C28, pin 7 of the chip U1 is grounded after being connected with a resistor R22, pin 11 of the chip U1 is connected with a dipped headlight LED3, a pin 10 of the chip U1 is connected with a resistor R18 and then connected with a dipped headlight LED3, the resistor R18 is connected with a resistor R15 and a resistor R14 in parallel, a pin 9 of the chip U1 is connected with a resistor R3 and a resistor R10, the other end of the resistor R3 is connected with a high beam LED2, a pin 13 of the chip U1 is connected with a resistor R6 and a capacitor C13, the other end of the resistor R6 is connected with a source level of a field effect tube Q1, the circuit is also connected with a resistor R11 and a resistor R12, the other end of the capacitor C13 is connected with the capacitor C6 and then connected with the high beam LED2, a pin 15 of the chip U1 is connected with a resistor R4, the other end of the resistor R4 is connected with a grid of the field effect tube Q1, a resistor R5 is connected between the grid of the field effect tube Q1 and the source level in parallel, and a drain electrode of the field effect tube Q1 is connected with one end of a voltage stabilizing diode D8; one end of the voltage stabilizing diode D13 is connected with the source level of the field effect transistor Q2, the other end of the voltage stabilizing diode D13 is connected with the grid electrode of the field effect transistor Q2, a capacitor C23 and a resistor R20 are connected in parallel at two ends of the voltage stabilizing diode D13, and a capacitor C22 is connected in parallel between the drain electrode and the grid electrode of the field effect transistor Q2.
In the preferred embodiment, the pin 2 of the photocoupler U3 is grounded after being connected with the resistor R44, the capacitor C36 and the resistor R41 are connected in parallel between the pin 1 and the pin 2 of the photocoupler U3, and the capacitor C35, the resistor R40 and the zener diode D17 are connected in parallel between the pin 3 and the pin 4 of the photocoupler U3.
In the preferred embodiment, pin 1 of the photocoupler U2 is connected with the resistor R23 and then connected with the position light wire W +, pin 2 of the photocoupler U2 is connected with the resistor R27 and the diode D15 and then connected with the light sensing wire, pin 3 of the photocoupler U2 is connected with the resistor R28 and the diode D6 and then connected with the dipped headlight wire J +, pin 4 of the photocoupler U2 is connected with the resistor R3 and then connected with the ground wire V-, pin 5 of the photocoupler U2 is connected with the resistor R31 and then connected with one end of the diode D7, pin 6 of the photocoupler U2 is connected with the resistor R34 and then connected with the ground wire V-, pin 7 of the photocoupler U2 is connected with one end of the resistor R23 and then connected with the resistor R38 and then connected with one end of the diode D15, pin 9, pin 11 and pin 13 of the photoelectric coupler U2 are connected with a grid of a field effect tube Q3 after being connected with a capacitor C30 respectively, a resistor R26 and a voltage stabilizing diode D16 are connected in parallel between the grid and a source of the field effect tube Q3, pin 10 of the photoelectric coupler U2 is connected with a resistor R42, the other end of the resistor R42 is connected with a capacitor C34, a field effect tube Q5, a resistor R43 and a voltage stabilizing diode D18, the other end of the capacitor C34 is connected with a diode D10 and then is connected with a dipped headlight line J +, two ends of the diode D10 are connected with a diode D9 in parallel, the other end of the voltage stabilizing diode D18 is connected with one end of the diode D2, and two ends of the voltage stabilizing diode D18 are connected with a capacitor C37 in parallel.
In this preferred embodiment, a resistor R25 and a capacitor C29 are connected in parallel between pin No. 1 and pin No. 2 of the photocoupler U2, a resistor R29 and a capacitor C31 are connected in parallel between pin No. 3 and pin No. 4 of the photocoupler U2, a resistor R32 and a capacitor C32 are connected in parallel between pin No. 5 and pin No. 6 of the photocoupler U2, and a resistor R36 and a capacitor C33 are connected in parallel between pin No. 7 and pin No. 8 of the photocoupler U2.
During specific implementation, the position lamp switch is connected with the position lamp wire, the overtaking switch is connected with the high beam lamp wire, the headlight switch is connected with the dipped headlight wire, the position lamp switch is linked with the headlight switch, and the high beam switch is respectively connected with the headlight switch and the high beam lamp wire. With 5 wires (position light wire, high beam light wire, low beam light wire, light sense wire, ground wire), the following logic can be implemented:
(1) the lighting switch OFF is closed, the position light and the dipped headlight can not be lighted, the overtaking switch can control the high beam to be lighted, and the high beam switch is closed and can not light the high beam;
(2) the lighting switch is in a position/automatic gear, the position lamp is switched to the right, the position lamp is turned on, the headlamp is not powered on, at the moment, a light sensing signal is given by the whole vehicle, and the light sensing signal is effective in a low level; the light sensation is lowered, the dipped headlight is lightened, the high beam can be lightened when the overtaking switch is closed, and the high beam can be lightened when the high beam switch is closed; the light sense is high, the dipped headlight is not lighted, the high beam can be lighted when the overtaking switch is closed, and the high beam can not be lighted when the high beam switch is closed;
(3) the lighting switch is in a headlight gear, the position light and the dipped headlight are lightened, the overtaking switch is closed, the high beam is lightened, and the high beam is closed.
The intelligent high-beam and low-beam LED high-speed driving circuit comprises a DC-DC LED constant current module, a 5-wire input end, an LED lamp group and an electromagnetic compatibility filter, and is driven by a logic circuit and a single group which are composed of a photoelectric coupler, so that high beam is preferentially flickered when overtaking is performed, low beam is controlled by a light sensing signal when a position lamp is turned on, normal switching of the high beam and the low beam is realized, the low beam is forcibly turned on when a headlamp switch is turned on, normal switching of the high beam and the low beam is realized, and the like, so that the interior of the headlamp is further intelligentized, the reliability of the system is improved, the 6-wire input function is reduced to 5 wires, the wiring of the whole vehicle is reduced, and the cost is reduced. The invention is suitable for intelligent control of LED headlights of electric vehicles, automobiles and the like, is successfully applied to a Bodi electric vehicle headlight system, and obtains good economic and social benefits.
The above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, but are not intended to limit the scope of the present invention, and all equivalent technical solutions also belong to the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (7)
1. Car light intelligent control circuit based on optoelectronic coupler, including port protection circuit, its characterized in that: the port protection circuit, the electromagnetic interference suppression circuit (3), the constant current drive circuit and the near-far light control circuit are sequentially connected, and the logic control circuit is connected with the constant current drive circuit; the port protection circuit comprises a first port protection circuit (1) and a second port protection circuit (2), one end of the first port protection circuit (1) is connected with a high beam light line Y +, the other end of the first port protection circuit is connected with a ground line V-, one end of the second port protection circuit (2) is connected with a position light line W +, and the other end of the second port protection circuit is connected with the ground line V-;
the electromagnetic interference suppression circuit comprises an inductor L3, one end of the inductor L3 is connected with a diode D2 and then is connected with a position lamp wire W +, and the other end of the inductor L3 is connected with an inductor L1 and then is connected with a constant current driving circuit;
the constant current driving circuit comprises a chip U1 and an inductor L2, one end of the inductor L2 is connected with the inductor L1, the other end of the inductor L2 is connected with a voltage stabilizing diode D8 and then connected with the high beam LED2, one end of the high beam LED2 is connected with a voltage stabilizing diode D13 and then connected with the near-far beam control circuit, and the other end of the high beam LED2 is connected with a dipped headlight LED3;
the near-far light control circuit comprises a photoelectric coupler U3, a pin 1 of the photoelectric coupler U3 is connected with a resistor R39 and a diode D7 and then is connected with a far-light lamp wire Y +, a pin 4 of the photoelectric coupler U3 is connected with a field-effect tube Q4 and a resistor R37, the resistor R37 is connected with one end of an inductor L1, and a drain electrode of the field-effect tube Q4 is connected with a resistor R33 and then is connected with a voltage-stabilizing diode D13;
the logic control circuit comprises a photoelectric coupler U2, a pin 12, a pin 14 and a pin 16 of the photoelectric coupler U2 are respectively connected with a grid electrode of a field-effect tube Q3, a pin 15 of the photoelectric coupler U2 is connected with a source electrode of the field-effect tube Q3, a drain electrode of the field-effect tube Q3 is connected with a pin 8 of a chip U1, and a grid electrode of the field-effect tube Q3 is connected with one end of an inductor L1 after being connected with a resistor R24.
2. The intelligent control circuit of a car light based on a photoelectric coupler as claimed in claim 1, characterized in that: the first port protection circuit (1) comprises a resistor R16, a capacitor C21 and a diode D12 which are connected in parallel, and the second port protection circuit (2) comprises a resistor R13, a capacitor C10 and a diode D11 which are connected in parallel.
3. The intelligent control circuit of a car light based on a photoelectric coupler as claimed in claim 1, wherein: one end of the inductor L3 is grounded in parallel with the capacitor C19 through the capacitor C20, the other end of the inductor L3 is grounded in parallel with the capacitor C12 through the capacitor C11, and a connecting circuit of the inductor L1 and the inductor L2 is grounded in parallel through the capacitor C14, the capacitor C15, the capacitor C16, the capacitor C17 and the resistor R7.
4. The intelligent control circuit of a car light based on a photoelectric coupler as claimed in claim 1, wherein: the pin No. 1 of the chip U1 is connected with a capacitor C4 and then grounded, the pin No. 2 of the chip U1 is connected with a capacitor C18 and a resistor R8, the resistor R8 is connected with a capacitor C24 and then grounded, a circuit between the resistor R8 and the capacitor C24 is connected with a diode D14, the pin No. 3 of the chip U1 is connected with a resistor R17, the other end of the resistor R17 is connected with the capacitor C24, the pin No. 8 of the chip U1 is connected with a capacitor C25 and then grounded, the pin No. 16 of the chip U1 is connected with a capacitor C26 and then grounded, the pin No. 4 of the chip U1 is connected with a capacitor C27 and then grounded, the pin No. 6 of the chip U1 is connected with a capacitor C28 and then grounded, the pin No. 7 of the chip U1 is connected with a resistor R22 and then grounded, and the pin No. 11 of the chip U1 is connected with a dipped headlight LED3, a pin 10 of the chip U1 is connected with a resistor R18 and then connected with a dipped headlight LED3, the resistor R18 is connected with a resistor R15 and a resistor R14 in parallel, a pin 9 of the chip U1 is connected with a resistor R3 and a resistor R10, the other end of the resistor R3 is connected with a high beam LED2, a pin 13 of the chip U1 is connected with a resistor R6 and a capacitor C13, the other end of the resistor R6 is connected with a source level of a field effect tube Q1, the circuit is also connected with a resistor R11 and a resistor R12, the other end of the capacitor C13 is connected with the capacitor C6 and then connected with the high beam LED2, a pin 15 of the chip U1 is connected with a resistor R4, the other end of the resistor R4 is connected with a grid of the field effect tube Q1, a resistor R5 is connected between the grid of the field effect tube Q1 and the source level in parallel, and a drain electrode of the field effect tube Q1 is connected with one end of a voltage stabilizing diode D8; one end of the voltage stabilizing diode D13 is connected with the source level of the field effect transistor Q2, the other end of the voltage stabilizing diode D13 is connected with the grid electrode of the field effect transistor Q2, a capacitor C23 and a resistor R20 are connected in parallel at two ends of the voltage stabilizing diode D13, and a capacitor C22 is connected in parallel between the drain electrode and the grid electrode of the field effect transistor Q2.
5. The intelligent control circuit of a car light based on a photoelectric coupler as claimed in claim 1, characterized in that: no. 2 pin of the photoelectric coupler U3 is connected with a resistor R44 and then grounded, a capacitor C36 and a resistor R41 are connected in parallel between No. 1 pin and No. 2 pin of the photoelectric coupler U3, and a capacitor C35, a resistor R40 and a voltage stabilizing diode D17 are connected in parallel between No. 3 pin and No. 4 pin of the photoelectric coupler U3.
6. The intelligent control circuit of a car light based on a photoelectric coupler as claimed in claim 1, characterized in that: the No. 1 pin of the photoelectric coupler U2 is connected with a resistor R23 and then connected with a position lamp wire W +, the No. 2 pin of the photoelectric coupler U2 is connected with a resistor R27 and a diode D15 and then connected with a light sensing wire, the No. 3 pin of the photoelectric coupler U2 is connected with a resistor R28 and a diode D6 and then connected with a dipped headlight wire J +, the No. 4 pin of the photoelectric coupler U2 is connected with a resistor R3 and then connected with a ground wire V-, the No. 5 pin of the photoelectric coupler U2 is connected with one end of a diode D7 and then connected with a resistor R34 and then connected with a ground wire V-, the No. 7 pin of the photoelectric coupler U2 is connected with one end of a resistor R23 and then connected with a resistor R38 and then connected with one end of a diode D15, pin 9, pin 11 and pin 13 of the photoelectric coupler U2 are connected with a grid of a field effect tube Q3 after being connected with a capacitor C30 respectively, a resistor R26 and a voltage stabilizing diode D16 are connected in parallel between the grid and a source of the field effect tube Q3, pin 10 of the photoelectric coupler U2 is connected with a resistor R42, the other end of the resistor R42 is connected with a capacitor C34, a field effect tube Q5, a resistor R43 and a voltage stabilizing diode D18, the other end of the capacitor C34 is connected with a diode D10 and then is connected with a dipped headlight line J +, two ends of the diode D10 are connected with a diode D9 in parallel, the other end of the voltage stabilizing diode D18 is connected with one end of the diode D2, and two ends of the voltage stabilizing diode D18 are connected with a capacitor C37 in parallel.
7. A car light intelligent control circuit based on photoelectric coupler according to claim 6 characterized in that: a resistor R25 and a capacitor C29 are connected in parallel between the pin No. 1 and the pin No. 2 of the photoelectric coupler U2, a resistor R29 and a capacitor C31 are connected in parallel between the pin No. 3 and the pin No. 4 of the photoelectric coupler U2, a resistor R32 and a capacitor C32 are connected in parallel between the pin No. 5 and the pin No. 6 of the photoelectric coupler U2, and a resistor R36 and a capacitor C33 are connected in parallel between the pin No. 7 and the pin No. 8 of the photoelectric coupler U2.
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| CN202211251341.7A CN115334717B (en) | 2022-10-13 | 2022-10-13 | Car light intelligent control circuit based on photoelectric coupler |
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| CN202211251341.7A CN115334717B (en) | 2022-10-13 | 2022-10-13 | Car light intelligent control circuit based on photoelectric coupler |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510618A (en) * | 2011-10-27 | 2012-06-20 | 惠州雷士光电科技有限公司 | Semiconductor lighting driving circuit, semiconductor lighting device, and dimming method for semiconductor lighting device |
| CN112512180A (en) * | 2020-12-18 | 2021-03-16 | 江苏新广联光电股份有限公司 | DMX512 control circuit capable of meeting EMC requirements |
| CN213755050U (en) * | 2020-12-18 | 2021-07-20 | 江苏新广联光电股份有限公司 | DMX512 control circuit capable of meeting EMC requirements |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510618A (en) * | 2011-10-27 | 2012-06-20 | 惠州雷士光电科技有限公司 | Semiconductor lighting driving circuit, semiconductor lighting device, and dimming method for semiconductor lighting device |
| CN112512180A (en) * | 2020-12-18 | 2021-03-16 | 江苏新广联光电股份有限公司 | DMX512 control circuit capable of meeting EMC requirements |
| CN213755050U (en) * | 2020-12-18 | 2021-07-20 | 江苏新广联光电股份有限公司 | DMX512 control circuit capable of meeting EMC requirements |
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