CN105966305A - Intelligent turn-off method and turn-off control device for high beam of running vehicle - Google Patents
Intelligent turn-off method and turn-off control device for high beam of running vehicle Download PDFInfo
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- CN105966305A CN105966305A CN201610385695.9A CN201610385695A CN105966305A CN 105966305 A CN105966305 A CN 105966305A CN 201610385695 A CN201610385695 A CN 201610385695A CN 105966305 A CN105966305 A CN 105966305A
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- 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
- B60Q1/076—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 by electrical means including means to transmit the movements, e.g. shafts or joints
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- 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
- B60Q1/085—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 due to special conditions, e.g. adverse weather, type of road, badly illuminated road signs or potential dangers
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- 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
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- 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
- B60Q2300/10—Indexing codes relating to particular vehicle conditions
- B60Q2300/14—Other vehicle conditions
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
本发明涉及行驶车辆的远光灯关闭方法及关闭控制装置，其方法是：本车辆上的所述远光灯关闭控制装置持续检测周围的光照度L，当L＞Lth时，判定对面来车开启了受到妨碍的远光灯信号，并对本车辆当前行驶速度v与所述速度阈值vth进行比较：在v≥vth时，不对远光灯进行操作控制；在v＜vth，且本车开启了远光灯时，关闭本车的远光灯；其装置包括光照度传感器、速度传感器、第一比较器、第二比较器、与门、驱动电路和远光灯开关电路。其优点是：既考虑到对面来车驾驶员视线不受本车辆远光灯的影响，又考虑到本车辆对远光灯的正常使用状态，从而既可保证安全性，又不影响驾驶员的正常操作。
The present invention relates to a method and a control device for turning off high beam lights of a driving vehicle. The method is as follows: the control device for turning off high beam lights on the vehicle continuously detects the surrounding illuminance L, and when L>Lth, it is determined that the oncoming vehicle is turned on. detect the hindered high beam signal, and compare the current driving speed v of the vehicle with the speed threshold vth: when v≥vth, the high beam is not controlled; when v<vth, and the vehicle turns on the high beam When the light is on, turn off the high beam of the car; its device includes an illuminance sensor, a speed sensor, a first comparator, a second comparator, an AND gate, a drive circuit and a high beam switch circuit. Its advantages are: it not only takes into account that the sight of the driver on the opposite side is not affected by the high beam of the vehicle, but also considers the normal use of the high beam of the vehicle, so that the safety can be guaranteed without affecting the driver's vision. normal operation.
Description
技术领域 technical field
本发明涉及远光灯控制，尤其涉及行驶车辆的远光灯智能关闭方法及关闭控制装置。 The invention relates to high beam control, in particular to a method for intelligently closing the high beam of a running vehicle and a closing control device.
背景技术 Background technique
根据国家《道路交通安全法》中相关条款规定，有6种情况下不能使用远光灯，因此远光使用情况比较复杂。而现实中，不正确使用远光灯的情况比较普遍，由此导致交通事故的报道也是屡见不鲜，其中不乏司机不正确使用了远光灯而自己无意识所引起。因此，设计对应的控制远光灯关闭的装置显得尤为必要。 According to the relevant provisions of the national "Road Traffic Safety Law", there are 6 situations where high beams cannot be used, so the use of high beams is more complicated. In reality, it is more common to use high beams incorrectly, and reports of traffic accidents are not uncommon. Among them, there are many drivers who use high beams incorrectly and cause them unconsciously. Therefore, it is particularly necessary to design a corresponding device for controlling high beams to be turned off.
由此，目前已有一些尝试解决上述问题的方法被提出。如：使用光传感器检测车辆周边是否属于照明良好，如果是，则自动关闭本车的远光灯。但在夜晚行车，仅仅因为照明良好就强制关闭远光灯并不是好的方法，因为远光灯除了照明，还有提醒其它车辆驾驶员避让的功能，因此在对对面来车的驾驶员视线不造成妨害的情况下，应保持其正常的使用状态。此外，从已有文献披露的这些方法中，都存在光检测效果受月光、路灯、散射光等的影响较大，效果不是很好的问题。 Therefore, some methods to try to solve the above problems have been proposed at present. For example: use the light sensor to detect whether the surrounding of the vehicle is well-lit, and if so, automatically turn off the high beam of the vehicle. But when driving at night, it is not a good way to forcibly turn off the high beam just because the lighting is good, because the high beam not only illuminates, but also has the function of reminding other drivers to avoid, so the driver's line of sight to the oncoming vehicle is not good. In the case of causing nuisance, it should be kept in normal use. In addition, among the methods disclosed in the existing literature, there is a problem that the light detection effect is greatly affected by moonlight, street lamps, scattered light, etc., and the effect is not very good.
发明内容 Contents of the invention
本发明的目的在于克服现有技术之不足，提供一种可防止远光灯不能正确被使用的一种行驶车辆的远光灯关闭方法及关闭控制装置，使车辆的夜间行驶更安全。 The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a method for turning off the high beam of a driving vehicle and a control device for turning off the high beam, which can prevent the high beam from being used correctly, so that the night driving of the vehicle is safer.
为实现上述目的，本发明采用了下述的技术方案。 In order to achieve the above object, the present invention adopts the following technical solutions.
行驶车辆的远光灯关闭方法是：在本车辆上设置具有速度阈值vth和光照度阈值Lth的远光灯关闭控制装置；当行驶中的车辆开启的远光灯对对面来车上的驾驶员视线形成妨碍时，对面来车上的驾驶员闪动自身车辆上的远光灯，本车辆上的所述远光灯关闭控制装置持续检测周围的光照度L，当L＞Lth时，判定对面来车开启了远光灯，并对本车辆当前行驶速度v与所述速度阈值vth进行比较：在v≥vth时，不对远光灯进行操作控制；在v＜vth，且本车开启了远光灯时，关闭本车的远光灯。 The method for turning off the high beams of a running vehicle is: setting a high beams off control device with a speed threshold v th and an illuminance threshold L th on the vehicle; When the driver's line of sight is obstructed, the driver on the oncoming vehicle flashes the high beam on his own vehicle, and the high beam off control device on the own vehicle continuously detects the surrounding illuminance L, and when L>Lth, it is determined that the oncoming vehicle is The incoming vehicle turns on the high beam, and compares the current driving speed v of the vehicle with the speed threshold vth: when v≥vth, the high beam is not controlled; when v<vth, the vehicle turns on the high beam When the lights are on, turn off the high beams of your vehicle.
实现上述远光灯关闭方法的远光灯关闭控制装置，包括光照度传感器、速度传感器、第一比较器、第二比较器、与门、驱动电路、蓄电池、两串接的分压电阻及由变光杆和推动变光杆动作的电磁铁线圈组成的电磁开关，所述分压电阻与远光灯并接，两并接端分别与蓄电池负极和变光杆的固定端连接；设定的光照度阈值Lth的信号与光照度传感器检测到的对面来车的灯光照度L的信号传送至第一比较器的输入端，设定的速度阈值vth的信号与速度传感器检测得到的本车辆当前行驶速度v的信号传送至第二比较器的输入端，第一、第二比较器对输入的信号进行比较，所得比较信号和由分压电阻分压端获取的逻辑电平信号传送至与门的输入端，经与门的“与”运算，得到的控制信号由与门输出端传送至驱动电路的输入端并经驱动电路放大传送至驱动变光杆动作的电磁铁线圈。 The high-beam off control device for realizing the above-mentioned high-beam off method includes an illuminance sensor, a speed sensor, a first comparator, a second comparator, an AND gate, a drive circuit, a storage battery, two series-connected voltage dividing resistors and a transformer An electromagnetic switch composed of a polished rod and an electromagnet coil that pushes the dimmer rod to move, the voltage dividing resistor is connected in parallel with the high beam, and the two parallel terminals are respectively connected to the negative pole of the battery and the fixed end of the dimmer rod; the set illuminance threshold L th The signal and the signal of the light illuminance L of the oncoming vehicle detected by the light sensor are transmitted to the input terminal of the first comparator, and the signal of the set speed threshold v th is combined with the signal of the current driving speed v of the vehicle detected by the speed sensor It is sent to the input terminal of the second comparator, and the first and second comparators compare the input signals, and the obtained comparison signal and the logic level signal obtained from the voltage dividing terminal of the voltage dividing resistor are transmitted to the input terminal of the AND gate, through In the "AND" operation of the AND gate, the obtained control signal is transmitted from the output terminal of the AND gate to the input terminal of the drive circuit, amplified by the drive circuit and transmitted to the electromagnet coil for driving the dimming rod.
为了使光照度传感器能更好地接收灯光，在光照度传感器接收光一侧方向上连接有滤光筒。 In order to make the illuminance sensor receive light better, a light filter tube is connected to the light receiving side of the illuminance sensor.
进一步的，所述滤光筒内壁为黑色。 Further, the inner wall of the filter tube is black.
进一步的，所述滤光筒为圆筒。 Further, the filter cylinder is a cylinder.
更进一步的，所述光照度传感器安装在驾驶员头部高度位置的车辆内侧，且滤光筒呈水平方向放置。 Furthermore, the illuminance sensor is installed on the inside of the vehicle at the height of the driver's head, and the filter tube is placed in a horizontal direction.
更进一步的，所述逻辑电平信号中的高电平信号为远光灯开启时的信号，所述逻辑电平信号中的低电平信号为远光灯关闭时的信号。 Further, the high-level signal in the logic level signals is a signal when the high beam is turned on, and the low-level signal in the logic level signal is a signal when the high beam is turned off.
更进一步的，所述驱动电路为电平放大电路。 Furthermore, the driving circuit is a level amplifying circuit.
本发明的有益效果在于：本发明的远光灯关闭方法及关闭控制装置根据检测到的对面来车的灯光照射情况来自动关闭远光灯，既考虑到对面来车的驾驶员视线不受本车辆远光灯的影响，又考虑到本车辆对远光灯的正常使用状态，即当本车辆的远光灯被关闭后，驾驶员仍可以根据驾驶需要执行正常的变光操作，对于驾驶员的操作和汽车的安全性没有任何影响；同时关闭方法简单易行，便于推广，关闭控制装置结构简单，工作可靠性高，制造成本低。 The beneficial effects of the present invention are: the high beam turning off method and the closing control device of the present invention automatically turn off the high beam according to the detected light irradiation situation of the oncoming vehicle, not only considering that the driver's line of sight of the oncoming vehicle is not affected by this The impact of the vehicle's high beams, and the normal use of the vehicle's high beams, that is, when the vehicle's high beams are turned off, the driver can still perform normal dimming operations according to driving needs. The operation and the safety of the car have no influence; at the same time, the closing method is simple and easy to implement, and is easy to popularize; the closing control device has a simple structure, high working reliability and low manufacturing cost.
附图说明 Description of drawings
图1是本发明的远光灯关闭控制装置的电路结构示意图。 FIG. 1 is a schematic diagram of the circuit structure of the high beam off control device of the present invention.
图2是滤光筒与光照度传感器连接的示意图。 Fig. 2 is a schematic diagram of the connection between the filter cylinder and the illuminance sensor.
图3是光照度传感器放置位置示意图。 Fig. 3 is a schematic diagram of the placement position of the illuminance sensor.
具体实施方式 detailed description
为了使车辆在晚间行驶时能正确使用远光灯，本发明在车辆上设置远光灯关闭控制装置，该远光灯关闭控制装置设置有车辆行驶速度的速度阈值vth和车灯光照度的光照度阈值Lth。当与本车辆同向行驶的车辆中有开启远光灯的，并且开启的远光灯对对面来车的驾驶员视线形成妨碍时，根据正确的驾驶规则，该视线受到妨碍的驾驶员将闪动自身车辆上的远光灯，以告知自己受到妨碍，即开启告知受到妨碍的远光灯信号。本车辆上持续检测周围环境光照度L的远光灯关闭控制装置在接收到对面来车的远光灯闪动照射后，通过检测到光照度L与阈值Lth的比较，就可做出对面来车是否开启远光灯的判定，当L＞Lth时，判定对面来车开启了远光灯，接着对本车辆当前行驶速度v与所述速度阈值vth进行比较，在v≥vth时，考虑到车速快，要求驾驶员的视野要远，因此对远光灯的使用不做限制，即远光灯关闭控制装置不对远光灯进行操作控制。在v＜vth时，若本车辆已打开远光灯，则远光灯关闭控制装置自动关闭本车的远光灯。在远光灯被自动关闭后，本车辆驾驶员可根据正常驾驶要求再次打开远光灯，本发明的关闭控制装置不会对驾驶员在正常状态下使用远光灯的操作进行任何限制。 In order to enable the vehicle to use the high beam correctly when driving at night, the present invention sets a high beam off control device on the vehicle, and the high beam off control device is provided with the speed threshold v th of the vehicle speed and the illuminance of the vehicle light illuminance Threshold L th . When the high-beam lights are turned on among the vehicles driving in the same direction as the vehicle, and the turned-on high-beam lights hinder the sight of the driver of the oncoming vehicle, according to the correct driving rules, the driver whose sight is hindered will flash Turn on the high beam lights on your own vehicle to inform yourself that you are obstructed, that is, turn on the high beam light signal that informs you that you are obstructed. The high-beam off control device on the vehicle that continuously detects the ambient illuminance L of the oncoming vehicle receives the flashing high-beam light of the oncoming vehicle and compares the detected illuminance L with the threshold value Lth to determine whether the oncoming vehicle is The determination of turning on the high-beam lights. When L>Lth, it is determined that the oncoming vehicle has turned on the high-beam lights. Then, the current driving speed v of the vehicle is compared with the speed threshold vth. When v≥vth, considering that the vehicle speed is fast, The driver's field of vision is required to be far away, so there is no restriction on the use of the high beam, that is, the high beam off control device does not operate and control the high beam. When v<vth, if the vehicle has turned on the high beam, the high beam off control device automatically turns off the high beam of the vehicle. After the high beam is automatically turned off, the driver of the vehicle can turn on the high beam again according to normal driving requirements, and the closing control device of the present invention will not restrict the driver's operation of using the high beam in a normal state.
当然，如若不是本车辆打开远光灯，而是同向行驶的其它车辆打开了远光灯而引起对面来车闪动远光灯，本车辆上的远光灯关闭控制装置不会对远光灯进行操作控制。因此，本发明装置对于驾驶员的操作和汽车的安全性没有任何影响。 Of course, if it is not the vehicle that turns on the high beam, but other vehicles traveling in the same direction turn on the high beam and cause the oncoming vehicle to flash the high beam, the high beam closing control device on the vehicle will not control the high beam. Lights are operationally controlled. Therefore, the device of the present invention does not have any influence on the driver's operation and the safety of the vehicle.
如图1，上述的远光灯关闭控制装置包括光照度传感器1（结合图3）、速度传感器（未画出）、第一比较器21、第二比较器22、与门3、驱动电路4、电磁开关5、蓄电池6和分压电阻71、72，电磁开关5由变光杆52和推动变光杆开合的电磁铁线圈51组成。两串接的分压电阻71、72并接在远光灯两端，所形成的两并接端分别变光杆52的固定端和接地（连接蓄电池6的负极）；光照度传感器对对面来车的灯光照度进行检测，检测得到的灯光照度L的信号与设定的光照度阈值Lth的信号输入至第一比较器21的输入端；同理，速度传感器将检测得到的本车辆当前行驶速度v的信号与设定的速度阈值vth的信号输入至第二比较器2的输入端，第一比较器1和第二比较器22分别对输入的两对应信号进行比较，两比较器的输出的比较信号和Key_on信号传送至与门的输入端，Key_on信号是由分压电阻71、72的分压端获取的逻辑电平信号，远光灯开启时为高电平，关闭时为低电平。与门3对上述输入的信号进行运算，输出对应控制信号，实质是一个电平信号，该电平信号由与门3的输出端传送至驱动电路4的输入端，经驱动电路4的放大由驱动电路4的输出端传送电磁铁线圈51，通过电磁铁线圈的吸合作用，驱动变光杆动作：当电磁铁线圈通电时，驱动变光杆动作到断开位置，使远光灯关闭；当电磁铁线圈不通电时，电磁铁对变光杆没有任何作用力，变光杆保持原来的状态，可以由驾驶员按驾驶需要进行操作。 As shown in Figure 1, the above-mentioned high beam off control device includes an illumination sensor 1 (in conjunction with Figure 3), a speed sensor (not shown), a first comparator 21, a second comparator 22, an AND gate 3, a drive circuit 4, Electromagnetic switch 5, battery 6 and voltage dividing resistors 71, 72, electromagnetic switch 5 is made up of dimmer rod 52 and the electromagnet coil 51 that promotes dimmer rod opening and closing. Two series-connected voltage dividing resistors 71, 72 are connected in parallel at both ends of the high beam, and the two parallel terminals formed are respectively the fixed end of the dimming rod 52 and the ground (connected to the negative pole of the storage battery 6); Light illuminance is detected, and the signal of the detected light illuminance L and the signal of the set illuminance threshold L th are input to the input end of the first comparator 21; similarly, the speed sensor will detect the current driving speed v of the vehicle The signal and the signal of the set speed threshold v th are input to the input terminal of the second comparator 2, and the first comparator 1 and the second comparator 22 respectively compare the two corresponding signals input, and the comparison of the outputs of the two comparators The signal and the Key_on signal are sent to the input terminal of the AND gate. The Key_on signal is a logic level signal obtained from the voltage dividing terminals of the voltage dividing resistors 71 and 72. When the high beam is turned on, it is at a high level, and when it is turned off, it is at a low level. The AND gate 3 performs calculations on the above-mentioned input signal, and outputs a corresponding control signal, which is essentially a level signal. The level signal is transmitted from the output terminal of the AND gate 3 to the input terminal of the drive circuit 4, and is amplified by the drive circuit 4. The output end of the driving circuit 4 transmits the electromagnet coil 51, and through the attraction of the electromagnet coil, the action of the dimmer rod is driven: when the electromagnet coil is energized, the dimmer rod is driven to the disconnected position, so that the high beam is turned off; When the iron coil is not energized, the electromagnet does not have any active force on the dimmer rod, and the dimmer rod keeps the original state, which can be operated by the driver according to driving needs.
如图2，本发明采用一个滤光筒11，该滤光筒11连接在光照度传感器1的接收光一侧方向上，优先选用圆柱形筒，且滤光筒内壁为黑色。该滤光筒11及光照度传感器安装在本车辆C1的内侧对应于驾驶员头部高度位置，且使滤光筒水平设置，如图3中M所示。车辆用于对道路照明的灯有远光灯和近光灯，参见图3，对面来车C2上的远光灯的光线照射角为A，直对着行驶方向照射，对于迎着对面来车行驶方向的本车辆而言可视为水平方向的平行光，而近光灯光线照射角为B，向着地面照射，显然与水平方向呈一定夹角。本发明的滤光筒11用以仅收集来自对面来车C2的远光灯发出的光，只有远光灯发出的近似水平方向的光线才能达到滤光筒一端的光照度传感器1，而其它与滤光筒筒壁不平行的光线基本不能到达滤光筒11的另一端，因为滤光筒的内壁为黑色，与滤光筒筒壁不平行的光线遇到筒壁后不能反射而被吸收，这些光到达光照度传感器时的光照度值L很小，检测到的光照度值L< Lth，远远达不到阈值Lth，而接收到的远光灯的光照度值L要比其它灯光的光照度值L明显大一个数量级。因此，通过设置光照度阈值Lth和滤光筒11使光照度传感器能准确辨别远光灯发出的信号，保证了对远光灯关闭动作的准确性。 As shown in Fig. 2, the present invention adopts a filter tube 11, which is connected to the direction of the light-receiving side of the illuminance sensor 1, preferably a cylindrical tube, and the inner wall of the filter tube is black. The filter tube 11 and the illuminance sensor are installed on the inside of the vehicle C1 at a position corresponding to the height of the driver's head, and the filter tube is arranged horizontally, as shown by M in FIG. 3 . The lights used by the vehicle to illuminate the road include high beam and low beam. See Figure 3. The high beam light on the oncoming vehicle C2 has an irradiation angle of A, and it is irradiated directly in the direction of travel. For the oncoming vehicle For the vehicle in the driving direction, it can be regarded as parallel light in the horizontal direction, while the low beam light is irradiated at an angle of B, irradiating toward the ground, obviously forming a certain angle with the horizontal direction. The light filter tube 11 of the present invention is used to only collect the light from the high beam of the oncoming car C2. The light rays that are not parallel to the wall of the light tube basically cannot reach the other end of the filter tube 11, because the inner wall of the filter tube is black, and the light that is not parallel to the wall of the filter tube cannot be reflected and absorbed after encountering the wall of the filter tube. The illuminance value L when light reaches the illuminance sensor is very small, and the detected illuminance value L< Lth is far below the threshold value Lth, while the illuminance value L of the received high beam is significantly larger than that of other lights One order of magnitude. Therefore, by setting the illuminance threshold L th and the filter tube 11 , the illuminance sensor can accurately distinguish the signal from the high beam, thereby ensuring the accuracy of closing the high beam.
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