WO2014075389A1 - 汽车前照灯智能控制方法与系统 - Google Patents

汽车前照灯智能控制方法与系统 Download PDF

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Publication number
WO2014075389A1
WO2014075389A1 PCT/CN2013/001388 CN2013001388W WO2014075389A1 WO 2014075389 A1 WO2014075389 A1 WO 2014075389A1 CN 2013001388 W CN2013001388 W CN 2013001388W WO 2014075389 A1 WO2014075389 A1 WO 2014075389A1
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WO
WIPO (PCT)
Prior art keywords
light intensity
low beam
current light
contactor
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2013/001388
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English (en)
French (fr)
Inventor
李飞
张磊
李会仙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhengzhou Yutong Bus Co Ltd
Original Assignee
Zhengzhou Yutong Bus Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhengzhou Yutong Bus Co Ltd filed Critical Zhengzhou Yutong Bus Co Ltd
Priority to EP13855167.6A priority Critical patent/EP2930061B1/en
Publication of WO2014075389A1 publication Critical patent/WO2014075389A1/zh
Priority to US14/713,429 priority patent/US9663022B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/06—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle
    • B60Q1/08—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights adjustable, e.g. remotely-controlled from inside vehicle automatically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • B60Q1/14—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights having dimming means
    • B60Q1/1415—Dimming circuits
    • B60Q1/1423—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic
    • B60Q1/143—Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic combined with another condition, e.g. using vehicle recognition from camera images or activation of wipers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
    • B60Q11/005—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00 for lighting devices, e.g. indicating if lamps are burning or not
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/30—Indexing codes relating to the vehicle environment
    • B60Q2300/31—Atmospheric conditions
    • B60Q2300/314—Ambient light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/30—Indexing codes relating to the vehicle environment
    • B60Q2300/33—Driving situation
    • B60Q2300/337—Tunnels or bridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q2300/00—Indexing codes for automatically adjustable headlamps or automatically dimmable headlamps
    • B60Q2300/40—Indexing codes relating to other road users or special conditions
    • B60Q2300/42—Indexing codes relating to other road users or special conditions oncoming vehicle

Definitions

  • the invention relates to an intelligent control method and system for automobile headlights.
  • the object of the present invention is to provide an intelligent control method and system for automobile headlights for improving driving safety and comfort, and solving the problem that the existing automobile control system does not have monitoring control results.
  • the method solution of the present invention is an intelligent control method for a car headlight, and the steps are as follows:
  • (A) setting parameters: Set the ambient light intensity threshold U 0j when the low beam is on, the ambient light intensity threshold U 0Y when the high beam is on ; enter the tunnel driving environment light intensity reduction rate threshold K s ; the ambient light intensity rise rate threshold K H at the beginning of the car ;
  • the current light intensity is detected again, if the current light intensity becomes smaller, or the current light intensity
  • the low beam light is turned on; if the current light intensity is not smaller and the current light intensity is greater than u 0j , the low beam is turned off;
  • the current light intensity is detected every ⁇ 3 time. If: the current light intensity becomes larger and the third light intensity rise rate ⁇ 3 is greater than ⁇ ⁇ , the vehicle starts, or the current light intensity becomes larger.
  • the third light intensity rising rate ⁇ 3 is not greater than ⁇ ⁇ and the current light intensity is greater than U 0Y , the high beam light is turned off, and the low beam light is turned off; if: the current light intensity does not become large, or the current light intensity becomes larger, and the third light intensity increases. If the rate K3 is not greater than K H and the current light intensity is not greater than U 0Y , the high beam is turned on.
  • the (B) step Before the (B) step enters the automatic control mode, it is judged whether it is in the automatic control mode, and if not, the manual operation is performed.
  • the invention also relates to an automobile headlight intelligent control system, comprising a main controller, a main controller input connection signal acquisition circuit, and an output connection drive output circuit, wherein the signal acquisition circuit comprises: a panel switch signal acquisition circuit and ambient light intensity
  • the signal output circuit includes: a near and high beam control drive circuit, wherein the signal acquisition circuit is provided with a fault feedback signal acquisition circuit, and the drive output circuit is provided with a fault signal output circuit.
  • the fault signal output circuit is a fault signal output circuit using a light-emitting diode, and is composed of a switch controlled by the main controller and a light-emitting diode connected in series with the switch tube.
  • the fault feedback signal acquisition circuit comprises two parts, one part is a filter circuit for detecting whether there is a voltage signal at the positive end of the far and low beam, and the corresponding input port of the main controller is connected to the positive end of the far and low beam by a filter circuit.
  • the other part is a voltage comparison circuit for detecting whether the far and low beam circuits have a current signal, and the main controller is respectively connected to the negative ends of the near and high beam through corresponding input ports.
  • the far and low beam lights are divided into right low beam light (Ll), right high beam light (L2), left low beam light (L3), left far light (L4), right low beam (L1) and left low beam (L3).
  • the positive terminal is shorted, and the right high beam (L2) is shorted to the positive end of the left high beam (L4).
  • the near and high beam control driving circuit comprises: short-circuiting the right low beam (L1) and the left low beam (L3), connecting the driving power through the first contactor (J1), and the right high beam (L2) After short-circuiting with the positive end of the left high beam (L4), the driving power is connected through the normally open contact of the second contactor (J2), and the coil of the first contactor (J1) passes through the second contactor (J2).
  • the closed contact is connected to the driving power source; the coils of the first contactor (J1) and the second contactor (J2) are grounded by a manual, automatic switching circuit.
  • the coils of the first contactor (J1) and the second contactor (J2) are grounded through a manual relay (K1).
  • the coils of the first contactor (J1) and the second contactor (J2) are respectively connected to corresponding ground control circuits controlled by the main controller.
  • the grounding control circuit corresponding to the coil of the first contactor (J1) and the second contactor (J2) includes a grounding relay that respectively connects the coils of the first contactor (J1) and the second contactor (J2) ( K3, ⁇ 4), the grounding relay ( ⁇ 3, ⁇ 4) has a switching tube controlled by the main controller.
  • the automobile headlight intelligent control system of the invention can automatically control the lighting and extinguishing of the headlights of the automobile according to the change of the ambient light intensity, and automatically realize the switching of the far/low beam when the vehicle is at night, and also has the self Diagnostic function. Regardless of whether the vehicle headlight control system works in automatic mode or manual mode, the system's self-diagnosis function can monitor the working status of the headlights, accurately locate the fault points, and output them through fault display lights or fault codes, facilitating maintenance personnel.
  • Overhaul or vehicle network-based vehicle operation system monitors vehicle lighting conditions, enabling drivers and related service personnel to grasp the working conditions of vehicle headlights in real time.
  • the system is not costly and has good versatility, and is suitable for popularization in various passenger cars and buses.
  • the system can adapt to various complex environmental conditions such as tunnel driving, night driving/parking, and can operate safely and reliably.
  • Figure 1 is a block diagram showing the circuit configuration of the present invention
  • FIG. 2 is a schematic circuit diagram of a main controller of the present invention
  • Figure 3 is a schematic diagram of the signal acquisition circuit
  • Figure 4 is a schematic diagram of the drive output circuit
  • Figure 5 is a program flow chart.
  • an intelligent control system for a car headlight includes a main controller (the minimum system of the main control chip in FIG. 1 ), a main controller input connection signal acquisition circuit, an output connection drive output circuit, and the signal acquisition.
  • the circuit includes: Panel switch signal acquisition circuit, ambient light intensity signal acquisition circuit, fault feedback signal acquisition circuit, drive output circuit including: near, high beam control drive circuit, fault signal output circuit.
  • the main controller communicates with the CAN bus in the car through the CAN interface circuit to receive information on the CAN bus.
  • circuit modules are specifically described below.
  • the main controller that is, the minimum system of the main control chip, as shown in FIG. 2, includes: a main control chip, a power supply circuit, a clock circuit, a reset circuit, and a program download interface circuit.
  • the main control chip is an MCU, which can realize 7 channels of 10 inputs, 6 channels of 10 outputs, and 1 channel of AD conversion.
  • C 1Q is the power supply decoupling capacitor of the MCU.
  • the power circuit consists of anti-reverse diode D, , transient suppression diode D 2 , polar capacitor C, C 2 , C 3 , non-polar capacitor C 4 , C 5 , C 6 , high precision DC24V/24V isolated power module , High precision DC24V/5V power module.
  • the main functions of the power supply circuit are: Provide stable operating voltage for the main control chip and other working circuits.
  • the clock circuit is composed of non-polar capacitors C u , C l2 , crystal body ⁇ , and resistor R 6 .
  • the reset circuit is composed of a reset chip U 6 , resistors R 7 , R 8 and a reset button, and generates a reset signal when the reset button Si is manually pressed or the power supply voltage is too low.
  • the program download interface circuit is implemented by Freescale's standard BDM interface.
  • the signal acquisition circuit is shown in Figure 3 ( Figure 2, Figure 3, Figure 4 are the same nodes), including: panel switch signal acquisition circuit, fault feedback signal acquisition circuit and ambient light intensity signal acquisition circuit.
  • the panel switch signal acquisition circuit includes a resistor R l2 .
  • the main function is to collect the switch signal of the manual/automatic switch S2 on the instrument panel to determine whether the manual signal is valid or the automatic signal is valid.
  • the ambient light intensity signal acquisition circuit includes an operational amplifier U7A, resistors R 16 and R 17 , and polar capacitors 5 and C 16 .
  • the final output voltage signal is reflected by the amplification of the current in the ambient light intensity sensor (photodiode D 3 ). The amount of ambient light intensity.
  • the fault feedback signal acquisition circuit comprises two parts, one part is a filter circuit for detecting whether there is a voltage signal at the positive end of the far and low beam, and the corresponding input ports II and 12 of the main controller are respectively connected to the far and low beam by the filter circuit.
  • the positive terminals F1 and F2 the filter circuit is a voltage dividing filter circuit composed of resistors and capacitors (R9, R10, R13, R14, C13, C14).
  • the other part is a voltage comparison circuit for detecting whether there is a current signal in the far and low beam circuit, and the main controller is connected to the negative ends F3 and F4 of the near and high beam through the corresponding input ports 13, 14, 15, and 16, respectively.
  • the fault signal output circuit is a fault signal output circuit using a light-emitting diode, and a switch tube controlled by the main controller and a light-emitting diode connected in series with the switch tube.
  • the fault signal output circuit is mainly composed of a resistor R 28 and an NPN transistor Q!, Q 5 , and the fault signal is controlled by the main control chip output fault signal 0 4 , 0 5 to control the on/off of the NPN transistor (lighting level 2 The light of the tubes D 4 , D 8 ) is turned on and off.
  • the first contactor J1 is connected to the driving power supply (V24), and the positive ends of L2 and L4 are short-circuited, and then the driving power is connected through the normally open contacts of the second contactor J2, the first contactor The coil of J1 is connected to the drive power through the normally closed contact of the second contactor J2.
  • the coils of the first contactor J1 and the second contactor J2 are connected to the combination switch and the rocker switch through the manual relay K1 (grounded by the combination switch and the rocker switch, the combination switch is used for manual light dimming, and the rocker switch is the light main switch) ).
  • the coils of the first contactor J1 and the second contactor J2 are respectively connected to corresponding grounding control circuits controlled by the main controller.
  • the grounding control circuit means that, in Figure 4, the coils of Jl and J2 are grounded through the grounding relays K3 and ⁇ 4, respectively, forming a loop, and the switching power supply Q3 controlled by the main controller is arranged in the coil power supply circuit of the grounding relays ⁇ 3 and ⁇ 4.
  • Q4; Q4 correspond to the output ports 03 and 02 of the main controller.
  • Grounding relays K3, ⁇ 4 coils are also provided with automatic relays ⁇ 5 in the power supply circuit.
  • the first gear on the right side of the ⁇ 2 is the manual gear, and the one gear on the left is the automatic gear.
  • K1 is energized, and the J1 coil circuit forms a loop by combining the yokes.
  • the conditions for Ll and L3 to illuminate are: J1 pull-in, J2 is off (ie, the position of J4 in Figure 4) , can connect J1 coil circuit);
  • L2, L4 lighting conditions are: J2 pull-in (different from J2 position in Figure 4, connect L2, L4 circuit), so J1 control loop is disconnected, J1 can not pick up.
  • the near and high beam control driving circuit includes: relay ⁇ , ⁇ 2 , ⁇ 3 , ⁇ 4 , ⁇ 5 , diode D 5 , D 6 , D 7 , resistor R 38 , R 39 , R40 and NPN transistor Q 2 , Q 3 , Q 4 , through the main control chip output O Bu 0 2 , 0 3 signal control relay closure and disconnection to achieve near, high beam manual automatic control switching, lighting and closing and near, far Automatic switching of light and other functions.
  • the control method of the present invention is as follows - (A), setting parameters: setting the ambient light intensity threshold U 0j when the low beam is turned on, setting the ambient light intensity threshold U OY when the high beam is turned on ; setting entry The tunneling ambient light intensity reduction rate threshold K s ; setting the ambient light intensity rise rate threshold K H when starting the vehicle ; (B), determine whether it is in the automatic control mode, if not, perform manual operation;
  • (C) in the automatic control mode, the far and low beam lights are off, and the current light intensity is detected every Atl time, if the current light intensity is less than Uo! , the first light intensity reduction rate K1 is calculated, and if Kl ⁇ Ks, enter the night driving mode, if Kl>Ks, enter the tunnel driving mode; in the night driving mode and the entering the tunnel driving mode, the low beam lights are turned on;
  • the current light intensity is detected every At2 time. If the current light intensity is not large, it is judged whether the current light intensity is less than U 0Y . If yes, turn off the light, turn on the high beam, if no Maintain the low beam on state; if the current light intensity becomes larger, calculate the second light intensity increase rate to determine whether it is in the tunnel driving mode. In the tunnel driving mode, the current light intensity is not greater than Uo! , or the current light intensity is greater than U 0j and K2>K H , maintaining the low beam illuminating state; if not in the tunnel driving mode, the current light intensity is greater than U 0 ;, and K2 is not greater than K H , then the low beam is turned off;
  • the current light intensity is detected again. If the current light intensity becomes smaller, or the current light intensity does not become smaller, and the current light intensity is not greater than U Qj , the low beam light is turned on; if the current light intensity has not changed Small, the current light intensity is greater than U 0j , then the light is off;
  • (E) when the high beam is on, the current light intensity is detected every time. If: the current light intensity becomes larger and the third light intensity increase rate K3 is greater than K H , the vehicle starts: or the current light intensity becomes larger, The light intensity rise rate K3 is not greater than K H , the current light intensity is greater than U OY , the off-beam light is turned off, and the low-beam light is off; if: the current light intensity does not become large, or the current light intensity becomes larger, and the third light intensity rise rate K3 does not If it is greater than K H and the current light intensity is not greater than U OY , the high beam is turned on.
  • step (3) the detection hand automatically switches the off signal 1, if ⁇ is low, step (3) is performed, if it is high, step (11) is performed;
  • the main control chip controls 10 8 to output a low level signal O.
  • the manual relay is electrically closed, and the control system is in a manual state;
  • the main control chip passes the 10 2 detection signal 1 2 , if the 1 2 is high level, the step (5 ) is performed, and if the 1 2 is low level, the step (7) is performed; (5) The main control chip detects the feedback signal I 5 through I0 5 and 10 7 respectively. If I 5 and 1 7 are not high at the same time, the step (6) is executed. If 1 5 and 1 7 are simultaneously high. If it is established, it will be implemented (10);
  • the main control chip controls the Iu output high level 0 4 , the fault light D 4 is on, and the step (10) is performed;
  • the main control chip passes the 10 3 detection signal 1 3 , if the 1 3 is high level, the step (8) is performed, and if the 1 3 is low level, the step (10) is performed;
  • control chip respectively 104, 106 detect the feedback signal 14, 16, if 14, 16 is high is not satisfied while executing step (9), if 14, 16 is high at the same time When the level is established, step (10) is performed;
  • the main control chip controls IO l2 to output a high level 0 5 , and the fault light D 5 is lit;
  • the main control chip controls 10 8 to output a high level signal 0, at which time the automatic relay K 5 is electrically closed, and the control system is in an automatic state;
  • the main control chip detects the ambient light intensity signal U N0W1 through AD ;
  • the main control chip Entering the night driving mode, the main control chip outputs the high level 0 2 , 0 6 through 10 9 , 10 13 , the low beam and the position light are on, and the step (20) is performed;
  • the main control chip outputs high level 0 2 , 0 6 through 10 9 , 10 13 , the low beam and the position light are on;
  • the main control chip passes the 10 2 detection signal 1 2 , if the 1 2 is high level, the step (21) is performed, and if the 1 2 is low level, the step (23) is performed;
  • step (21) The main control chip detects the feedback signals 1 5 and 1 7 through 10 5 and 10 7 respectively. If 1 5 and 1 7 are not high at the same time, step (22) is performed, if 1 5 and 1 7 are simultaneously high. When the level is established, step (26) is performed; (22) The main control chip controls IO touched output high level 0 4 , fault light D 4 is bright;
  • the main control chip detects the ambient light intensity signal U N0W3 through AD ;
  • step (30) Comparing the size between U N0W4 and U NOW3 , if U NOW4 is greater than U N0W3 , step (30) is performed, and if U N0 W4 is not greater than U N0W3 , step (39) is performed;
  • the main control chip detects the ambient light intensity signal U NOW7 through AD ;
  • step (35) Comparing the size between U N0W7 and U ai , if U N0W7 is greater than Uoi, step (36) is performed, and if U N0W7 is not greater than U 0J , step (20) is performed;
  • the main control chip outputs low level 0 2 , 0 6 through I0 9 , 10 13 respectively, the low beam and the position light are turned off, and returns to the execution step (2);
  • step (36) comparing the size between the two , if K 2 is not greater than K H then step (36), if greater than step (40);
  • the main control chip passes 10, and the detection hand automatically switches the switch signal I, if I! If it is low, go to step (41), if I! If it is high, it returns to step (20); (41)
  • the main control chip outputs low level signals 0 2 , 0 3 , 0 6 through I0 9 , ⁇ , ⁇ , 10 13 respectively, and the low beam, high beam and position lights are off, and the execution step is returned ( 3);
  • the main control chip outputs a low level signal 0 2 through 10 9 , and outputs a high level signal 0 3 through 10 1 () , at which time the low beam light is off and the high beam light is on;
  • the main control chip detects the feedback signal 1 3 through 10 3 , if step 1 3 is high level, step (44) is performed, and if it is low level, step (46) is performed;
  • the main control chip detects the feedback signal 1 4 , 1 6 through 10 4 , 10 6 , if the 1 4 , 16 6 is not high at the same time, the step (45) is performed, if yes, the step (48) is performed;
  • the main control chip outputs a high level 0 5 through 10 12 , and the fault light D 5 is illuminated;
  • the main control chip detects the ambient light intensity signal U NOW5 through AD ;
  • step (56) comparing the size between K 3 and K H , if K 3 is not greater than K H then step (54), if greater than step (56);
  • step (5) The master chip passes 10, the detection hand automatically switches the signal I, if I, is low, then step (41), if I! If it is high, it returns to step (43);
  • the main control chip outputs a low level 0 3 through I0 1C) , the high beam is off, and the execution step (18) is returned;
  • the main control chip outputs low level 0 0 2 , 0 3 , 0 6 through ⁇ 0 8 , ⁇ 0 9 , ⁇ , ⁇ , ⁇ ⁇ 3 respectively , at this time, the near, high beam and position light are off, The control system forcibly switches to the manual state;
  • the system When the system is in the manual state, it can automatically adjust the headlight status of the car when the driving environment changes, such as: automatic opening and closing of the headlights, automatic switching of the near-high beam, etc., without manual operation by the driver. , greatly reducing the driver's labor intensity and improving the safety and comfort of driving;
  • the system's self-diagnosis function can monitor the working status of the headlights, accurately locate the fault points, and output them through fault display lights or fault codes, facilitating maintenance personnel.
  • Overhaul or vehicle network-based vehicle operation system monitors vehicle lighting conditions, enabling drivers and related service personnel to grasp the working conditions of vehicle headlights in real time;
  • the system has little change to the vehicle's own electrical circuit, which is convenient for installation on various passenger cars and passenger cars, and has good versatility.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

一种汽车前照灯智能控制方法与系统,用以提高行车安全性与舒适性,同时解决现有汽车控制系统不具备监测控制结果的问题。本发明的汽车前照灯智能控制系统,能够根据外界环境光强度变化自动控制汽车前照灯的点亮与熄灭,并且在夜间会车时自动实现远/近光灯的切换,同时还具备自诊断功能。不管车辆前照灯控制系统工作在自动模式或者手动模式,系统的自诊断功能都可以监测前照灯的工作状态,并准确定位故障点,通过故障显示灯或故障代码的方式输出,方便维护人员检修或基于车联网的车辆运营系统监控车辆照明情况,使驾驶员以及相关服务人员实时掌握车辆前照灯工作状况。

Description

说 明 书
汽车前照灯智能控制方法与系统
技术领域
本发明涉及汽车前照灯智能控制方法与系统。
背景技术
目前, 汽车前照灯操作方式多为手动控制, 相关乘用车厂家已在高端车型中配备前照 灯自动控制系统, 但大多数成本较高, 并且功能较为简单, 多数系统只进行前照灯点亮与 熄灭、 远 /近光灯切换的控制, 并不监测前照灯控制的执行结果。 伴随车联网系统的普及应 用, 车辆各个关键部件的运行状态将被纳入车辆运营系统监控之中, 因此对汽车前照灯工 作状态进行监测, 也会成为汽车电器系统未來发展的趋势。
发明内容
本发明的目的是提供一种汽车前照灯智能控制方法与系统, 用以提高行车安全性与舒 适性, 同时解决现有汽车控制系统不具备监测控制结果的问题。
为实现上述目的, 本发明的方法方案是一种汽车前照灯智能控制方法, 步骤如下:
(A), 设定参数: 设定近光灯开启时的环境光强度阀值 U0j, 远光灯开启时的环境光 强度阀值 U0Y ; 进入隧道行车环境光强度下降率阀值 Ks ; 幵始会车时环境光强度上升率阀 值 KH ;
(B), 在自动控制模式下, 远、 近光灯均关闭状态下, 每隔 Atl时间检测当前光强度, 若当前光强度小于 U0』, 则计算第一光强度下降速率 Kl, 若 Kl<Ks, 进入夜间行驶模式, 若 Kl>Ks, 进入隧道行车模式; 夜间行驶模式和进入隧道行车模式下, 近光灯均开启;
(C) , 近光灯开启状态下, 每隔 At2时间检测当前光强度, 如果当前光强度未变大, 则 判断当前光强度是否小于 UOY, 若是, 关近光灯, 丌启远光灯, 若否, 维持近光灯开启状态; 如果当前光强度变大, 则计算第二光强度上升速率 K2,并判断是否处于隧道行车模式, 在不是处于隧道行车模式下, 如果当前光强度不大于 U0j, 或者当前光强度大于 1]0;且 K2>KH, 则维持近光灯开启状态; 在不是处于隧道行车模式, 如果当前光强度大于 U0j, 且 K2不大于 KH, 则关近光灯;
若处于隧道行车模式下, 再次检测当前光强度, 若当前光强度变小, 或者当前光强度
1
确认本 未变小且当前光强度不大于 u0j, 则维持近光灯开启状态; 若当前光强度未变小且当前光强 度大于 u0j, 则关近光灯;
(D), 在远光灯开启状态下, 每隔 Δί3时间检测当前光强度, 如果: 当前光强度变大且 第三光强度上升速率 Κ3大于 ΚΗ, 开始会车, 或者当前光强度变大、 第三光强度上升速率 Κ3不大于 ΚΗ且当前光强度大于 U0Y, 关远光灯, 丌启近光灯; 如果: 当前光强度不变大, 或者当前光强度变大、 第三光强度上升速率 K3不大于 KH且当前光强度不大于 U0Y, 则维 持远光灯开启状态。
在 (B ) 步骤进入自动控制模式之前, 判断是否在自动控制模式下, 如果不是则进行手 动操作。
本发明还涉及一种汽车前照灯智能控制系统, 包括主控制器, 主控制器输入连接信号 采集电路, 输出连接驱动输出电路, 所述信号采集电路包括: 面板开关信号采集电路与环 境光强度信号采集电路, 所述驱动输出电路包括: 近、 远光灯控制驱动电路, 其特征在于, 所述信号采集电路设有故障反馈信号采集电路, 所述驱动输出电路设有故障信号输出电路。
所述故障信号输出电路为采用发光二极管的故障信号输出电路, 由主控器控制的开关 管及与所述开关管串联的发光二极管构成。
所述故障反馈信号采集电路包括两部分, 一部分为用于检测远、 近光灯正端是否有电 压信号的滤波电路, 主控器的对应输入端口通过滤波电路连接远、 近光灯的正端; 另一部 分为用于检测远、 近光灯电路是否有电流信号的电压比较电路, 主控制器通过对应的输入 端口分别连接近、 远光灯的负端。
远、 近光灯分为右近光灯 (Ll )、 右远光灯 (L2 )、 左近光灯 (L3 )、 左远光灯 (L4); 右近光灯 (L1 ) 与左近光灯 (L3 ) 的正端短接, 右远光灯 (L2) 与左远光灯 (L4) 的正端 短接。
所述近、 远光灯控制驱动电路包括: 右近光灯 (L1 ) 与左近光灯 (L3 ) 的正端短接后 通过第一接触器 (J1 ) 接驱动电源, 右远光灯 (L2 ) 与左远光灯 (L4 ) 的正端短接后通过 第二接触器(J2)的常开触点连接驱动电源, 第一接触器(J1 )的线圈通过第二接触器(J2) 的常闭触点连接驱动电源; 第一接触器(J1 ) 与第二接触器 (J2 ) 的线圈通过手动、 自动切 换电路接地。 所述第一接触器 (J1 ) 与第二接触器 (J2) 的线圈通过手动继电器 (K1 ) 接地。
所述第一接触器(J1 ) 与第二接触器(J2) 的线圈分别连接对应的、 受主控制器控制的 接地控制电路。
所述第一接触器(J1 )与第二接触器(J2 ) 的线圈对应的接地控制电路包括分别连接所 述第一接触器(J1 )与第二接触器(J2) 的线圈的接地继电器(K3、 Κ4), 接地继电器(Κ3、 Κ4) 的线圈回路中串设有受控于主控制器的开关管。
本发明的汽车前照灯智能控制系统, 能够根据外界环境光强度变化自动控制汽车前照 灯的点亮与熄灭, 并且在夜间会车时自动实现远 /近光灯的切换, 同时还具备自诊断功能。 不管车辆前照灯控制系统工作在自动模式或者手动模式, 系统的自诊断功能都可以监测前 照灯的工作状态, 并准确定位故障点, 通过故障显示灯或者故障代码的方式输出, 方便维 护人员检修或基于车联网的车辆运营系统监控车辆照明情况, 使驾驶员以及相关服务人员 实时掌握车辆前照灯工作状况。 本系统成本不高, 通用性较好, 适合在各种乘用车、 客车 上普及。 系统能够适应隧道行车、 夜间行车 /会车等各种复杂环境状况, 并能够安全可靠运 行。
附图说明
图 1是本发明的电路构成框图;
图 2是本发明的主控制器电路原理图;
图 3是信号采集电路原理图;
图 4是驱动输出电路原理图;
图 5是程序流程图。
具体实施方式
下面结合附图对本发明做进一步详细的说明。
系统实施例
本文中, 未区别标号后数字与数字下标, 如 Π与 1,都表示图 2、 图 3中 Π节点电平。 12与 12、 13与 13...同理。
如图 1所示的一种汽车前照灯智能控制系统, 包括主控制器 (图 1 中主控芯片最小系 统), 主控制器输入连接信号采集电路, 输出连接驱动输出电路, 所述信号采集电路包括: 面板开关信号采集电路, 环境光强度信号采集电路, 故障反馈信号采集电路, 驱动输出电 路包括: 近、 远光灯控制驱动电路, 故障信号输出电路。 主控制器通过 CAN接口电路与车 内 CAN总线通讯连接, 接收 CAN总线上的信息。
下面分别对各电路模块具体介绍。
主控制器, 即主控芯片最小系统, 如图 2, 包括: 主控芯片、 电源电路、 时钟电路、 复 位电路以及程序下载接口电路。 主控芯片为 MCU, 能够实现 7路 10输入、 6路 10输出以 及 1路 AD转换, C1Q为 MCU的电源去耦电容。 电源电路由防反接二极管 D, , 瞬态抑制二 极管 D2, 极性电容 C,、 C2、 C3, 非极性电容 C4、 C5、 C6, 高精度 DC24V/24V隔离电源模 块, 高精度 DC24V/5V 电源模块组成。 电源电路主要功能为: 为主控芯片以及其他工作电 路提供稳定工作电压。 时钟电路由非极性电容 Cu、 Cl2, 晶振体 ¥,以及电阻 R6组成。 复位 电路由复位芯片 U6, 电阻 R7、 R8以及复位按钮 组成, 在手动按下复位按钮 Si或者电源 提供电压过低时产生复位信号。 程序下载接口电路采用飞思卡尔标准 BDM接口实现。
信号采集电路如图 3所示 (图 2、 图 3、 图 4相同标号为相同节点), 包括: 面板开关 信号采集电路、 故障反馈信号采集电路以及环境光强度信号采集电路。 面板开关信号采集 电路包含一个电阻 Rl2, 主要功能是采集仪表台上手动 /自动切换开关 S2的开关信号, 判断 是手动信号有效还是自动信号有效。 环境光强度信号采集电路包含运算放大器 U7A, 电阻 R16、 R17, 极性电容 5、 C16组成, 通过对环境光强度传感器 (光敏二极管 D3) 中电流的 放大, 最终输出电压信号以反映环境光强度大小。
故障反馈信号采集电路包括两部分, 一部分为用于检测远、 近光灯正端是否有电压信 号的滤波电路, 主控器的对应输入端口 II、 12通过滤波电路分别连接远、近光灯的正端 Fl、 F2, 滤波电路为由电阻电容(R9、 R10、 R13 , R14、 C13、 C14 )分别构成的分压滤波电路。 另一部分为用于检测远、 近光灯电路是否有电流信号的电压比较电路, 主控制器通过对应 的输入端口 13、 14、 15、 16分别连接近、 远光灯的负端 F3、 F4、 F5、 F6, 见图 4。
故障信号输出电路为采用发光二极管的故障信号输出电路, ώ主控器控制的开关管及 与所述开关管串联的发光二极管构成。 如图 4, 故障信号输出电路主要由电阻 R28、 和 NPN三极管 Q!、 Q5组成, 通过主控芯片输出故障信号 04、 05控制 NPN三极管的通断来控 制故障灯 (发光二级管 D4、 D8) 的亮与灭。 近、 远光灯控制驱动电路驱动控制四个指示灯 Ll、 L2、 L3、 L4: 分为右近光灯 Ll、 右远光灯 L2、 左近光灯 L3、 左远光灯 L4; 右近光灯 L1与左近光灯 L3的正端短接, 右远 光灯 L2与左远光灯 L4的正端短接。
L1与 L3的正端短接后通过第一接触器 J1接驱动电源 (V24), L2与 L4的正端短接 后通过第二接触器 J2的常开触点连接驱动电源, 第一接触器 J1 的线圈通过第二接触器 J2 的常闭触点连接驱动电源。 第一接触器 J1与第二接触器 J2的线圈通过手动继电器 K1连接 到组合开关和翘板开关 (通过组合开关和翘板开关接地, 组合开关用来手动变光, 翘板开 关为灯光总开关)。 第一接触器 J1与第二接触器 J2的线圈分别连接对应的、 受主控制器控 制的接地控制电路。 接地控制电路是指, 图 4中, Jl、 J2的线圈分别通过接地继电器 K3、 Κ4接地, 形成回路, 接地继电器 Κ3、 Κ4的线圈供电回路中串设有受控于主控制器的开关 管 Q3、 Q4; Q3、 Q4分别对应主控制器的输出端口 03、 02。 接地继电器 K3、 Κ4的线圈 供电回路中还串设有自动继电器 Κ5。
Κ2右边一档为手动挡, 左侧一档为自动挡。 在 Κ2切手动时挡时, K1得电吸合, J1线 圈电路通过组合丌关形成回路, Ll、 L3点亮的条件是: J1吸合, J2断开 (即图 4中 J4丌 关所在位置, 能够连通 J1线圈回路); L2、 L4点亮的条件是: J2吸合 (不同于图 4中 J2 位置, 连接 L2、 L4电路), 所以此时 J1控制回路断开, J1不能吸合。 在 K2切自动时, 自 动继电器 K5得电吸合, 03、 02输出控制有效, Ll、 L3点亮的条件是: J1吸合, J2断开, K4吸合, 02为高电平; L2、 L4点亮的条件是: J2吸合, K3吸合, 03为高电平。
如图 4, 近、 远光灯控制驱动电路包括: 继电器 Κ,、 Κ2、 Κ3、 Κ4、 Κ5, 二极管 D5、 D6、 D7, 电阻 R38、 R39、 R40以及 NPN三极管 Q2、 Q3、 Q4, 通过主控芯片输出的 O卜 02、 03 信号控制继电器闭合与断开来实现近、 远光灯的手自动控制切换、 点亮与关闭以及近、 远 光自动切换等功能。
方法实施例
本发明的控制方法如下- (A), 设定参数: 设定近光灯开启时的环境光强度阀值 U0j, 设定远光灯开启时的环境 光强度阀值 UOY ; 设定进入隧道行车环境光强度下降率阀值 Ks ; 设定开始会车时环境光强 度上升率阀值 KH ; (B) , 判断是否在自动控制模式下, 如果不是则进行手动操作;
(C) , 在自动控制模式下, 远、 近光灯均关闭, 每隔 Atl时间检测当前光强度, 若当前 光强度小于 Uo!,则计算第一光强度下降速率 K1,若 Kl<Ks,进入夜间行驶模式,若 Kl>Ks, 进入隧道行车模式; 夜间行驶模式和进入隧道行车模式下, 近光灯均丌启;
(D), 近光灯开启情况下, 每隔 At2时间检测当前光强度, 如果当前光强度未变大, 则 判断当前光强度是否小于 U0Y, 若是, 关近光灯, 开启远光灯, 若否, 维持近光灯开启状态; 如果当前光强度变大, 则计算第二光强度上升速率, 判断是否处于隧道行车模式, 在 不是处于隧道行车模式下, 当前光强度不大于 Uo!, 或者当前光强度大于 U0j且 K2>KH, 维 持近光灯丌启状态; 若不是处于隧道行车模式, 当前光强度大于 U0;, 且 K2不大于 KH, 则 关近光灯;
若处于隧道行车模式下, 再次检测当前光强度, 若当前光强度变小, 或者当前光强度 未变小、 当前光强度不大于 UQj, 则维持近光灯开启状态; 若当前光强度未变小、 当前光强 度大于 U0j, 则关近光灯;
(E), 在远光灯开启情况下, 每隔 时间检测当前光强度, 如果: 当前光强度变大且 第三光强度上升速率 K3 大于 KH, 开始会车: 或者当前光强度变大、 光强度上升速率 K3 不大于 KH、 当前光强度大于 UOY, 关远光灯, 幵启近光灯; 如果: 当前光强度不变大, 或 者当前光强度变大、 第三光强度上升速率 K3不大于 KH、 当前光强度不大于 UOY, 则维持 远光灯丌启状态。
如图 5, 具体流程如下:
( 1 ) 分别确定近、 远光灯开启时的环境光强度阀值 Uo!、 UOY以及进入隧道行车环境 光强度下降率阀值 Ks和开始会车时环境光强度上升率阔值 KH ;
(2 )主控芯片通过 10,检测手自动切换丌关信号 1,, 若 ^为低电平, 则执行步骤(3 ), 若 为高电平, 则执行步骤 (11 );
(3 ) 主控芯片控制 108输出低电平信号 O 此时手动继电器 得电闭合, 控制系统 处于手动状态;
(4) 主控芯片通过 102检测信号 12, 若 12为高电平则执行步骤 (5 ), 若 12为低电平则 执行步骤 (7); (5) 主控芯片分别通过 I05、 107检测反馈信号 I5、 , 若 I5、 17同时为高电平不成立 则执行歩骤 (6), 若 15、 17同时为高电平成立则执行歩骤 (10);
(6) 主控芯片控制 IOu输出高电平 04, 故障灯 D4亮, 执行步骤 (10);
(7) 主控芯片通过 103检测信号 13, 若 13为高电平则执行歩骤 (8), 若 13为低电平则 执行步骤 (10);
(8) 主控芯片分别通过 104、 106检测反馈信号 14、 16, 若 14、 16同时为高电平不成立 则执行步骤 (9), 若 14、 16同时为高电平成立则执行步骤 (10);
(9) 主控芯片控制 IOl2输出高电平 05, 故障灯 D5亮;
(10) 通过 CAN总线发送故障代码, 返回执行步骤 (2);
(11) 主控芯片控制 108输出高电平信号 0,, 此时自动继电器 K5得电闭合, 控制系统 处于自动状态;
(12) 主控芯片通过 AD检测环境光强度信号 UN0W1;
(13) 调用延时子程序, 延时 At1;
(14) 再次检测环境光强度信号 UN0W2;
(15) 比较 UN0W2与 U0;之间的大小, 若 UNOW2不小于 1;0;则返回执行步骤 (2), 若 UNOw2小于 Uai则执行步骤 (16);
(16) 根据 UN0W1、 UNOW2、 At,计算光强度下降速率 = -¾ u^¾o -:,
(17) 比较 与 Ks之间的大小, 若 小于 Ks则执行步骤 (18), 若 不小于 Ks则 执行歩骤 (19);
(18)进入夜间行车模式, 主控芯片通过 109、 1013输出高电平 02、 06, 近光灯以及示 廓灯亮, 执行步骤 (20);
(19)进入隧道行车模式, 主控芯片通过 109、 1013输出高电平 02、 06, 近光灯以及示 廓灯亮;
(20) 主控芯片通过 102检测信号 12, 若 12为高电平则执行歩骤 (21), 若 12为低电平 则执行步骤 (23);
(21) 主控芯片分别通过 105、 107检测反馈信号 15、 17, 若 15、 17同时为高电平不成立 则执行步骤 (22), 若 15、 17同时为高电平成立则执行步骤 (26); (22) 主控芯片控制 IO„输出高电平 04, 故障灯 D4亮;
(23) 通过 CAN总线发送故障代码;
(24)判断现在是否处于隧道行车模式,若不是则执行步骤(25),若是则执行步骤(57);
(25) 判断远光灯是否已坏, 若未坏则执行步骤 (42), 若己坏则执行步骤 (57);
(26) 主控芯片通过 AD检测环境光强度信号 UN0W3;
(27) 调用延时子程序, 延时 Δ¾;
(28) 再次检测环境光强度信号 UN0W4;
(29) 比较 UN0W4与 UNOW3之间的大小, 若 UNOW4大于 UN0W3则执行步骤 (30), 若 UN0W4不大于 UN0W3则执行歩骤 ( 39 );
(30) 根据 UNOW4、 UNOw3以及 At2计算光强度上升速率 ^ = ¾0ί;' ;¾ΰ;Γ; ;
(31)判断现在是否处于隧道行车模式,若是则执行歩骤(32),若不是则执行歩骤(37);
(32) 调用延时子程序, 延时 At4;
(33) 主控芯片通过 AD检测环境光强度信号 UNOW7;
(34) 比较 UN0W7与 UN0W4之间的大小, 若 UNOW7不小于 UN0W4则执行步骤(35), 若 UN0W7小于 UN0W4则执行歩骤 ( 20 ) ;
(35) 比较 UN0W7与 Uai之间的大小, 若 UN0W7大于 Uoi则执行步骤 (36), 若 UN0W7 不大于 U0J则执行步骤 (20);
(36)主控芯片分别通过 I09、 1013输出低电平 02、 06, 近光灯以及示廓灯均关闭, 返 回执行歩骤 (2);
(37) 比较 UN0W4与 Ua,之间的大小, 若 UNOW4大于 U0j则执行步骤 (38), 若不大于 则执行步骤 (40);
(38) 比较 与 之间的大小, 若 K2不大于 KH则执行步骤 (36), 若大于则执行步 骤 (40);
(39) 比较 UN0W4与 U0Y之间的大小, 若 UN0W4不小于 U0Y则执行歩骤(40), 若小于 则执行步骤 (42);
(40)主控芯片通过 10,检测手自动切换开关信号 I,,若 I!为低电平,则执行步骤(41 ), 若 I!为高电平, 则返回执行步骤 (20); (41) 主控芯片分别通过 I09、 ΙΟ,ο, 1013输出低电平信号 02、 03、 06, 近光灯、 远光 灯以及示廓灯均灭, 返回执行歩骤 (3);
(42) 主控芯片通过 109输出低电平信号 02, 通过 101()输出高电平信号 03, 此时近光 灯灭, 远光灯亮;
(43) 主控芯片通过 103检测反馈信号 13, 若 13为高电平则执行步骤 (44), 若为低电 平则执行歩骤 (46);
(44) 主控芯片通过 104、 106检测反馈信号 14、 16, 若 14、 16同时为高电平不成立则执 行步骤 (45), 若成立则执行步骤 (48);
(45) 主控芯片通过 1012输出高电平 05, 此时故障灯 D5亮;
(46) 通过 CAN总线发送故障代码;
(47) 判断近光灯是否已坏, 若未坏则执行歩骤 (56), 若已坏则执行歩骤 (57);
(48) 主控芯片通过 AD检测环境光强度信号 UNOW5;
(49) 调用延时子程序, 延时 At3;
(50) 再次检测环境光强度信号 UNOW6;
(51) 比较 UNOW6与 UN0W5之间的大小, 若 UNOW6大于 UN0W5则执行歩骤(52), 若不 大于则执行步骤 (55);
(52) 根据 UN0W6、 Uwow5以及 At3计算光强度上升速率
Figure imgf000011_0001
(53) 比较 K3与 KH之间的大小, 若 K3不大于 KH则执行步骤 (54), 若大于则执行步 骤 (56);
(54) 比较 UN0W6与 U0Y之间的大小, 若!!^ 不大于 U0Y执行歩骤(55), 若大于则 执行步骤 (56);
(55)主控芯片通过 10,检测手自动切换丌关信号 I,,若 I,为低电平,则执行步骤(41), 若 I!为高电平, 则返回执行步骤 (43);
(56) 主控芯片通过 I01C)输出低电平 03, 远光灯灭, 返回执行歩骤 (18);
(57) 主控芯片分别通过 Ι08、 Ι09、 ΙΟ,ο, ΙΟΙ3输出低电平 0 02、 03、 06, 此时, 近、 远光灯以及示廓灯均熄灭, 同时控制系统强制切换到手动状态;
(58) 程序结朿。 本发明的有益效果如下:
系统处于手动状态时能够在行车环境发生变化时, 适时的对汽车前照灯状态进行自动 调整, 如: 前照灯的自动开与关、 近远光灯的自动切换等, 无需驾驶员手动操作, 大大降 低了驾驶员的劳动强度, 提高了行车的安全性与舒适性;
不管车辆前照灯控制系统工作在自动模式或者手动模式, 系统的自诊断功能都可以监 测前照灯的工作状态, 并准确定位故障点, 通过故障显示灯或者故障代码的方式输出, 方 便维护人员检修或基于车联网的车辆运营系统监控车辆照明情况, 使驾驶员以及相关服务 人员实时掌握车辆前照灯的工作状况;
系统对车辆本身电器线路改动不大, 方便于安装到各种乘用车以及客车上, 通用性好。

Claims

权 利 要 求 书
1. 汽车前照灯智能控制方法, 其特征在于, 步骤如下:
(A), 设定参数: 设定近光灯开启时的环境光强度阀值 U0;, 远光灯开启时的环境 光强度阀值 UOY; 进入隧道行车环境光强度下降率阀值 Ks ; 开始会车时环境光强度上 升率阀值 KH ;
(B), 在自动控制模式下, 远、 近光灯均关闭状态下, 每隔 Atl时间检测当前光强 度, 若当前光强度小于 U0j, 则计算第一光强度下降速率 Kl, 若 Kl<Ks, 进入夜间行 驶模式, 若 Kl>Ks, 进入隧道行车模式; 夜间行驶模式和进入隧道行车模式下, 近光灯 均开启;
(C ),近光灯开启状态下,每隔 At2时间检测当前光强度, 如果当前光强度未变大, 则判断当前光强度是否小于 U0Y, 若是, 关近光灯, 开启远光灯, 若否, 维持近光灯开 启状态;
如果当前光强度变大, 则计算第二光强度上升速率 K2, 并判断是否处于隧道行车 模式, 在不是处于隧道行车模式下, 如果当前光强度不大于 υω, 或者当前光强度大于 UOJ且 Κ2>ΚΗ, 则维持近光灯开启状态; 在不是处于隧道行车模式, 如果当前光强度大 于 U0;, 且 K2不大于 KH, 则关近光灯;
若处于隧道行车模式下, 再次检测当前光强度, 若当前光强度变小, 或者当前光强 度未变小且当前光强度不大于 υω, 则维持近光灯丌启状态; 若当前光强度未变小且当 前光强度大于 Uo!, 则关近光灯;
(D ), 在远光灯开启状态下, 每隔 M3时间检测当前光强度, 如果: 当前光强度变 大且第三光强度上升速率 K3大于 KH, 幵始会车, 或者当前光强度变大、第三光强度上 升速率 K3不大于 KH且当前光强度大于 U0Y, 关远光灯, 开启近光灯; 如果: 当前光 强度不变大, 或者当前光强度变大、 第三光强度上升速率 K3不大于 KH且当前光强度 不大于 U0Y, 则维持远光灯开启状态。
2. 根据权利要求 1 所述的汽车前照灯智能控制方法, 其特征在于, 在 (B) 歩骤 进入自动控制模式之前, 判断是否在自动控制模式下, 如果不是则进行手动操作。
3. 实施权利要求 1方法的汽车前照灯智能控制系统, 包括主控制器, 主控制器输 入连接信号采集电路, 输出连接驱动输出电路, 所述信号采集电路包括: 面板开关信号采 集电路与环境光强度信号采集电路, 所述驱动输出电路包括: 近、 远光灯控制驱动电路, 其特征在于, 所述信号采集电路设有故障反馈信号采集电路, 所述驱动输出电路设有故障 信号输出电路。
4. 根据权利要求 3所述的汽车前照灯智能控制系统, 其特征在于, 所述故障信号 输出电路为采用发光二极管的故障信号输出电路, ώ主控器控制的开关管及与所述开关管 串联的发光二极管构成。
5. 根据权利要求 4所述的一种汽车前照灯智能控制系统, 其特征在于, 所述故障 反馈信号采集电路包括两部分, 一部分为用于检测远、 近光灯 JH端是否有电压信号的滤波 电路, 主控器的对应输入端口通过滤波电路连接远、 近光灯的正端; 另一部分为用于检测 远、 近光灯电路是否有电流信号的电压比较电路, 主控制器通过对应的输入端口分别连接 近、 远光灯的负端。
6. 根据权利要求 5所述的一种汽车前照灯智能控制系统, 其特征在于, 远、 近光 灯分为右近光灯 (Ll )、 右远光灯 (L2 )、 左近光灯 (L3 )、 左远光灯 (L4); 右近光灯 (L1 ) 与左近光灯 (L3 ) 的正端短接, 右远光灯 (L2 ) 与左远光灯 (L4) 的正端短接。
7. 根据权利要求 6所述的一种汽车前照灯智能控制系统, 其特征在于, 所述近、 远光灯控制驱动电路包括: 右近光灯 (L1 ) 与左近光灯 (L3 ) 的正端短接后通过第一接触 器(J1 )接驱动电源, 右远光灯(L2 )与左远光灯(L4)的正端短接后通过第二接触器(J2) 的常开触点连接驱动电源, 第一接触器 (J1 ) 的线圈通过第二接触器(J2 ) 的常闭触点连接 驱动电源; 第一接触器 (J1 ) 与第二接触器 (J2 ) 的线圈通过手动、 自动切换电路接地。
8. 根据权利要求 7所述的一种汽车前照灯智能控制系统, 其特征在于, 所述第一 接触器 (J1 ) 与第二接触器 (J2) 的线圈通过手动继电器 (K1 ) 接地。
9. 根据权利要求 8所述的一种汽车前照灯智能控制系统, 其特征在于, 所述第一 接触器(J1 )与第二接触器(J2 )的线圈分别连接对应的、受主控制器控制的接地控制电路。
10. 根据权利要求 9所述的一种汽车前照灯智能控制系统, 其特征在于, 所述第一 接触器(J1 ) 与第二接触器(J2) 的线圈对应的接地控制电路包括分别连接所述第一接触器
(J1 ) 与第二接触器 (J2 ) 的线圈的接地继电器 (K3、 Κ4 ), 接地继电器 (Κ3、 Κ4 ) 的线 圈回路中串设有受控于主控制器的幵关管。
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