CN211019384U - Automatic control system for lighting equipment of engineering truck - Google Patents
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Abstract
本实用新型公开了一种工程车照明设备自动控制系统,属于自动控制技术领域,包括信号采集电路、控制电路、调节电路和照明设备;信号采集电路的输出经控制电路与调节电路连接,调节电路的输出与照明设备连接。由信号采集电路采集车外光照强度和转向灯开关信号,交由控制电路综合判断,输出控制信号;由调节电路调节电流大小,最后控制照明设备进行照明,在夜间工程车在较复杂施工现场作业过程中转向时照明设备自动开启,具有提醒驾驶员注意车轮行驶轨迹、提醒周围施工人员以及作业车辆的作用。
The utility model discloses an automatic control system for lighting equipment of an engineering vehicle, belonging to the technical field of automatic control, comprising a signal acquisition circuit, a control circuit, a regulating circuit and lighting equipment; The output is connected to a lighting device. The signal acquisition circuit collects the light intensity outside the vehicle and the signal of the turn signal switch, which is comprehensively judged by the control circuit, and outputs the control signal; the current is adjusted by the adjustment circuit, and finally the lighting equipment is controlled for lighting, and the construction vehicle works at the complex construction site at night. In the process of turning, the lighting device is automatically turned on, which has the function of reminding the driver to pay attention to the driving track of the wheels, and reminding the surrounding construction personnel and operation vehicles.
Description
技术领域technical field
本实用新型涉及自动控制技术领域,特别涉及一种工程车照明设备自动控制系统。The utility model relates to the technical field of automatic control, in particular to an automatic control system for lighting equipment of an engineering vehicle.
背景技术Background technique
施工现场环境复杂,工作面交叉作业多,夜间施工作业由于视线较差,易造成安全事故。尤其是在工程车辆体型较大,驾驶视野盲区较多,而且经常在工地或者山路等照明条件较差的环境工作。工程车在夜间作业时需要转向时由于存在过多的盲区,极易发生安全事故。造成这样的事故主要原因是车辆没有辅助照明措施,驾驶员在倒车或者转向时无法看清车身两侧及后面的情况。The construction site environment is complex, and there are many intersecting operations on the working face. Due to the poor visibility of night construction operations, it is easy to cause safety accidents. Especially in construction vehicles, which are larger in size, have more blind spots in driving vision, and often work in environments with poor lighting conditions such as construction sites or mountain roads. When the engineering vehicle needs to turn at night, it is very prone to safety accidents due to the existence of too many blind spots. The main reason for such an accident is that the vehicle has no auxiliary lighting measures, and the driver cannot see the sides and rear of the vehicle when reversing or turning.
实用新型内容Utility model content
本实用新型的目的在于克服现有技术的缺陷,提供一种具有提醒驾驶员注意车轮行驶轨迹、提醒周围施工人员以及作业车辆的作用的工程车照明设备自动控制系统。The purpose of the utility model is to overcome the defects of the prior art, and to provide an automatic control system for lighting equipment of a construction vehicle with the functions of reminding the driver to pay attention to the running track of the wheels, and reminding the surrounding construction personnel and working vehicles.
为实现以上目的,本实用新型采用一种工程车照明设备自动控制系统,包括信号采集电路、控制电路、调节电路和照明设备;信号采集电路的输出经控制电路与调节电路连接,调节电路的输出与照明设备连接。In order to achieve the above purpose, the utility model adopts an automatic control system for lighting equipment of an engineering vehicle, which includes a signal acquisition circuit, a control circuit, an adjustment circuit and a lighting equipment; the output of the signal acquisition circuit is connected with the adjustment circuit through the control circuit, and the output of the adjustment circuit is connected. Connect with lighting equipment.
进一步地,所述信号采集电路包括转向灯开关信号采集电路和车外光照强度信号采集电路。Further, the signal acquisition circuit includes a turn signal switch signal acquisition circuit and an exterior light intensity signal acquisition circuit.
进一步地,转向灯开关信号采集电路包括转向灯开关SW和光电隔离器U2,转向灯开关SW的一端经电阻R2与光电隔离器U2中发光二极管的阳极连接,转向灯开关SW的另一端依次经电阻R1、保险丝FU1后接入电源电压;光电隔离器U2中发光二极管的阴极接地,光电隔离器U2中三极管的集电极连接所述控制电路的一输入引脚。Further, the turn signal switch signal acquisition circuit includes a turn signal switch SW and a photoelectric isolator U2, one end of the turn signal switch SW is connected to the anode of the light emitting diode in the photoelectric isolator U2 through a resistor R2, and the other end of the turn signal switch SW is sequentially The resistor R1 and the fuse FU1 are connected to the power supply voltage; the cathode of the light emitting diode in the photoelectric isolator U2 is grounded, and the collector of the triode in the photoelectric isolator U2 is connected to an input pin of the control circuit.
进一步地,所述车外光照强度信号采集电路包括光敏电阻LDR和NPN型三极管Q1,光敏电阻LDR的一端经电阻R5与NPN型三极管Q1的基极连接,光敏电阻LDR的另一端与NPN型三极管Q1的发射极连接,NPN型三极管Q1的集电极经电阻R3和电阻R4与光敏电阻LDR的一端连接,且NPN型三极管Q1的集电极与所述控制电路的一输入引脚连接,电阻R6一端与电阻R3连接,另一端与光电隔离器U2中三极管的集电极连接。Further, the outside light intensity signal acquisition circuit includes a photoresistor LDR and an NPN triode Q1, one end of the photoresistor LDR is connected to the base of the NPN triode Q1 via a resistor R5, and the other end of the photoresistor LDR is connected to the NPN triode. The emitter of Q1 is connected, the collector of the NPN transistor Q1 is connected to one end of the photoresistor LDR through the resistor R3 and the resistor R4, and the collector of the NPN transistor Q1 is connected to an input pin of the control circuit, and one end of the resistor R6 It is connected to resistor R3, and the other end is connected to the collector of the triode in the opto-isolator U2.
进一步地,所述控制电路为单片机,单片机的P1.0引脚与NPN型三极管Q1的集电极连接,单片机的P1.1引脚与光电隔离器U2中三极管的集电极连接,单片机的P1.7引脚与所述调节电路的输入连接。Further, the control circuit is a single-chip microcomputer, the P1.0 pin of the single-chip microcomputer is connected with the collector of the NPN type triode Q1, the P1.1 pin of the single-chip microcomputer is connected with the collector of the transistor in the opto-isolator U2, and the P1. Pin 7 is connected to the input of the conditioning circuit.
进一步地,所述调节电路包括NPN型三极管Q2、继电器RL和滑动变阻器RV,所述单片机的P1.7引脚输出经电阻R7与NPN型三极管Q2的基极连接,NPN型三极管Q2的发射极与继电器RL连接,NPN型三极管Q2的集电极接入转向灯开关SW的另一端,VCC输出依次经保险丝FU2、电阻R2、继电器RL和滑动变阻器RV与所述照明设备连接。Further, the adjustment circuit includes NPN type triode Q2, relay RL and sliding rheostat RV, the P1.7 pin output of the single-chip microcomputer is connected with the base of NPN type triode Q2 through resistor R7, and the emitter of NPN type triode Q2 is connected. Connected to the relay RL, the collector of the NPN transistor Q2 is connected to the other end of the turn signal switch SW, and the VCC output is sequentially connected to the lighting equipment through the fuse FU2, the resistor R2, the relay RL and the sliding rheostat RV.
进一步地,所述照明设备为后视灯,安装在车辆两侧。Further, the lighting equipment is a rear view lamp, which is installed on both sides of the vehicle.
与现有技术相比,本实用新型存在以下技术效果:本实用新型首先由信号采集电路采集车外光照强度和转向灯开关信号,再通过控制电路输出高低电平,再由调节电路调节电流大小,控制信号首先通过信号放大电路进行放大,再根据方向盘转角的大小自动调节电流,转角越大输出到照明设备的电流越大,控制照明设备进行照明。这样能够使驾驶员注意到车轮行驶的位置,同时也使周围施工人员以及作业车辆注意到车辆的行驶状态。本方案具有操作简单,成本低,适应性广且可靠性强。Compared with the prior art, the utility model has the following technical effects: the utility model first collects the light intensity outside the vehicle and the turn signal switch signal by the signal acquisition circuit, then outputs the high and low levels through the control circuit, and then adjusts the current size by the adjustment circuit. , the control signal is first amplified by the signal amplifying circuit, and then the current is automatically adjusted according to the size of the steering wheel angle. In this way, the driver can notice the position where the wheels are running, and at the same time, the surrounding construction personnel and work vehicles can notice the running state of the vehicle. The scheme has the advantages of simple operation, low cost, wide adaptability and strong reliability.
附图说明Description of drawings
下面结合附图,对本实用新型的具体实施方式进行详细描述:Below in conjunction with the accompanying drawings, the specific embodiments of the present utility model are described in detail:
图1是一种工程车照明设备自动控制系统的结构示意图;Fig. 1 is a structural schematic diagram of an automatic control system for lighting equipment of an engineering vehicle;
图2是一种工程车照明设备自动控制系统的电路结构示意图。FIG. 2 is a schematic diagram of the circuit structure of an automatic control system for lighting equipment of an engineering vehicle.
具体实施方式Detailed ways
为了更进一步说明本实用新型的特征,请参阅以下有关本实用新型的详细说明与附图。所附图仅供参考与说明之用,并非用来对本实用新型的保护范围加以限制。In order to further illustrate the features of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. The attached drawings are for reference and description only, and are not intended to limit the protection scope of the present invention.
如图1所示,本实施例公开了一种工程车照明设备自动控制系统,包括:信号采集电路、控制电路、调节电路和照明设备;信号采集电路的输出经控制电路与调节电路连接,调节电路的输出与照明设备连接。其中,所述信号采集电路包括转向灯开关信号采集电路和车外光照强度信号采集电路,以分别采集采集转向灯开关信号和车外光照强度。As shown in FIG. 1 , this embodiment discloses an automatic control system for lighting equipment of an engineering vehicle, including: a signal acquisition circuit, a control circuit, a regulating circuit and lighting equipment; the output of the signal acquisition circuit is connected to the regulating circuit through the control circuit, and the regulating circuit is The output of the circuit is connected to the lighting device. Wherein, the signal collection circuit includes a turn signal switch signal collection circuit and a vehicle exterior light intensity signal collection circuit, so as to collect and collect the turn signal switch signal and the exterior light intensity respectively.
具体来说,信号采集电路作用是利用传感器采集转向灯开关信号和车外光照强度信号并进行信号转换;控制电路作用是对采集的传感器信号进行综合处理,并输出控制信号;调节电路作用是调节输入到执行模块的电流强度;照明设备作用是提供照明。Specifically, the function of the signal acquisition circuit is to use the sensor to collect the turn signal switch signal and the light intensity signal outside the vehicle and convert the signal; the function of the control circuit is to comprehensively process the collected sensor signal and output the control signal; the function of the adjustment circuit is to adjust The current intensity input to the execution module; the role of the lighting device is to provide lighting.
具体工作原理为:由信号采集电路采集车外光照强度和转向灯开关信号,再通过控制电路综合判断,如果光强较亮,判断为不需要开启照明设备;如果光强较暗,并且转向灯开关开启,则判断为需要开启照明设备,并输出控制信号。再由调节电路调节电流大小,控制信号首先通过信号放大电路进行放大,再根据方向盘转角的大小自动调节电流,转角越大输出到执行模块的电流越大,最后控制照明设备进行照明。其功能是在夜间工程车在较复杂施工现场作业过程中转向时照明设备自动开启,达到提醒驾驶员注意车轮行驶轨迹、提醒周围施工人员以及作业车辆的作用。The specific working principle is: the signal acquisition circuit collects the light intensity outside the vehicle and the turn signal switch signal, and then comprehensively judges through the control circuit. If the light intensity is bright, it is judged that the lighting equipment does not need to be turned on; When the switch is turned on, it is determined that the lighting device needs to be turned on, and a control signal is output. The current is adjusted by the adjustment circuit. The control signal is first amplified by the signal amplification circuit, and then the current is automatically adjusted according to the steering wheel angle. The larger the angle, the greater the current output to the execution module, and finally the lighting equipment is controlled for lighting. Its function is to automatically turn on the lighting equipment when the construction vehicle turns at night during the operation of the more complex construction site, so as to remind the driver to pay attention to the driving track of the wheels, and remind the surrounding construction personnel and operation vehicles.
具体来说,如图2所示,转向灯开关信号采集电路包括转向灯开关SW和光电隔离器U2,转向灯开关SW的一端经电阻R2与光电隔离器U2中发光二极管的阳极连接,转向灯开关SW的另一端依次经电阻R1、保险丝FU1后接入电源电压;光电隔离器U2中发光二极管的阴极接地,光电隔离器U2中三极管的集电极连接所述控制电路的一输入引脚。Specifically, as shown in Figure 2, the signal acquisition circuit of the turn signal switch includes a turn signal switch SW and an optoelectronic isolator U2. One end of the turn signal switch SW is connected to the anode of the light emitting diode in the opto-isolator U2 through a resistor R2. The other end of the switch SW is connected to the power supply voltage through the resistor R1 and the fuse FU1 in sequence; the cathode of the light-emitting diode in the photoelectric isolator U2 is grounded, and the collector of the triode in the photoelectric isolator U2 is connected to an input pin of the control circuit.
其工作原理为:光电隔离器U2的作用是将采集的转向灯开关SW信号整合成高低电平输入单片机U1的P1.1引脚。当驾驶员开启转向灯时,转向灯开关SW闭合。此时光电隔离器U2中的发光二极管导通,此时输入单片机U1的P1.1引脚的信号为低电位信号。当驾驶员开启转向灯时,转向灯开关SW断开。此时光电隔离器U2中的发光二极管截止,此时输入单片机U1的P1.1引脚的信号为高电位信号。因此,检测单片机U1的P1.4引脚的输入电平高低可以判定转向灯开关的状态。Its working principle is: the function of the photoelectric isolator U2 is to integrate the collected turn signal switch SW signal into a high and low level and input it to the P1.1 pin of the single-chip microcomputer U1. When the driver turns on the turn signal, the turn signal switch SW is closed. At this time, the light-emitting diode in the photoelectric isolator U2 is turned on, and the signal input to the P1.1 pin of the single-chip microcomputer U1 is a low-level signal at this time. When the driver turns on the turn signal, the turn signal switch SW is turned off. At this time, the light-emitting diode in the photoelectric isolator U2 is turned off, and the signal input to the P1.1 pin of the single-chip microcomputer U1 is a high potential signal at this time. Therefore, the state of the turn signal switch can be determined by detecting the input level of the P1.4 pin of the microcontroller U1.
具体来说,车外光照强度信号采集电路包括光敏电阻LDR和NPN型三极管Q1,光敏电阻LDR的一端经电阻R5与NPN型三极管Q1的基极连接,光敏电阻LDR的另一端与NPN型三极管Q1的发射极连接,NPN型三极管Q1的集电极经电阻R3和电阻R4与光敏电阻LDR的一端连接,且NPN型三极管Q1的集电极与所述控制电路的一输入引脚连接,电阻R6一端与电阻R3连接,另一端与光电隔离器U2中三极管的集电极连接。Specifically, the external light intensity signal acquisition circuit includes a photoresistor LDR and an NPN transistor Q1. One end of the photoresistor LDR is connected to the base of the NPN transistor Q1 through a resistor R5, and the other end of the photoresistor LDR is connected to the NPN transistor Q1. The emitter of the NPN transistor Q1 is connected to one end of the photoresistor LDR through the resistor R3 and the resistor R4, and the collector of the NPN transistor Q1 is connected to an input pin of the control circuit, and one end of the resistor R6 is connected to The resistor R3 is connected, and the other end is connected to the collector of the triode in the opto-isolator U2.
其工作原理为:夜间行车时光强较暗,光敏电阻阻值较大,此时NPN型三极管Q1基极电压为高电平信号,三极管导通,则输入单片机U1的P1.0引脚的信号为低电位信号。白天行车时,光敏电阻阻值较小,此时NPN型三极管Q1基极电压为低电平信号,三极管截止,则此时输入单片机U1的P1.0引脚的信号为高电位信号。因此,检测单片机U1的P1.0引脚的输入电平高低可以判定车外光线强度。Its working principle is: the night driving light is darker, and the resistance value of the photoresistor is large. At this time, the base voltage of the NPN transistor Q1 is a high-level signal, and the transistor is turned on, then the signal of the P1.0 pin of the single-chip microcomputer U1 is input. is a low-level signal. When driving in the daytime, the resistance value of the photoresistor is small. At this time, the base voltage of the NPN transistor Q1 is a low-level signal, and the transistor is off. At this time, the signal input to the P1.0 pin of the single-chip microcomputer U1 is a high-level signal. Therefore, detecting the input level of the P1.0 pin of the microcontroller U1 can determine the light intensity outside the vehicle.
具体来说,所述控制电路为单片机,单片机的P1.0引脚与NPN型三极管Q1的集电极连接,单片机的P1.1引脚与光电隔离器U2中三极管的集电极连接,单片机的P1.7引脚与所述调节电路的输入连接。Specifically, the control circuit is a single-chip microcomputer, the P1.0 pin of the single-chip microcomputer is connected to the collector of the NPN transistor Q1, the P1.1 pin of the single-chip microcomputer is connected to the collector of the transistor in the opto-isolator U2, and the P1. The .7 pin is connected to the input of the conditioning circuit.
单片机系统的作用是对采集的传感器信号进行综合处理,并输出控制信号。其根据P1.0引脚和P1.1引脚输入的信号综合判断是否需要开启照明设备。若需要开启,则由P1.7引脚输出高电平信号;若不需要,P1.7引脚则输出低电平信号。只有在夜间行车,并且驾驶员开启转向时才判定位需要开启照明设备。即P1.0引脚和P1.4引脚同时输入低电位信号时,单片机U1判定为需要开启照明设备,此时P1.7引脚输出高电平信号。The function of the single-chip microcomputer system is to comprehensively process the collected sensor signals and output control signals. It comprehensively judges whether the lighting device needs to be turned on according to the signals input by the P1.0 pin and the P1.1 pin. If it needs to be turned on, the P1.7 pin outputs a high-level signal; if not, the P1.7 pin outputs a low-level signal. Only when driving at night and the driver turns on the steering is it determined that the lighting device needs to be turned on. That is, when the P1.0 pin and the P1.4 pin input a low-level signal at the same time, the microcontroller U1 determines that the lighting device needs to be turned on, and at this time, the P1.7 pin outputs a high-level signal.
具体来说,所述调节电路包括NPN型三极管Q2、继电器RL和滑动变阻器RV,所述单片机的P1.7引脚输出经电阻R7与NPN型三极管Q2的基极连接,NPN型三极管Q2的发射极与继电器RL连接,NPN型三极管Q2的集电极接入转向灯开关SW的另一端,VCC输出依次经保险丝FU2、电阻R2、继电器RL和滑动变阻器RV与所述照明设备连接。Specifically, the adjustment circuit includes an NPN transistor Q2, a relay RL and a sliding rheostat RV, the P1.7 pin output of the microcontroller is connected to the base of the NPN transistor Q2 through a resistor R7, and the NPN transistor Q2 emits The pole is connected to the relay RL, the collector of the NPN transistor Q2 is connected to the other end of the turn signal switch SW, and the VCC output is sequentially connected to the lighting equipment through the fuse FU2, the resistor R2, the relay RL and the sliding rheostat RV.
调节电路的作用是调节输入到执行模块的电流强度。由NPN型三极管Q2控制继电器RL。当单片机U1的P1.7引脚输出低电平时,三极管Q1截止,继电器RL不工作;当车单片机U1的P1.7引脚输出高电平时,三极管U1导通,使得继电器RL工作。继电器RL是照明设备的开关,继电器工作时,电流从VCC流出经保险丝FU、电阻R2、继电器RL和滑动变阻器RV到照明设备L,照明设备L点亮。当继电器不工作时,没有电流流过照明设备L,照明设备L不亮。滑动变阻器RV的作用是调节照明设备L的电流。滑动变阻器RV的滑动触头与方向盘相连,随方向盘转动而移动,初始状态时其滑动触头位于滑动变阻器RV的最下端。当方向盘转动时,滑动变阻器RV的滑动触头向上移动,转角越大,照明设备L的电流越大。方向盘回正时,滑动变阻器RV的滑动触头随之转动又重新处于初始状态。The function of the adjustment circuit is to adjust the current intensity input to the execution module. The relay RL is controlled by the NPN transistor Q2. When the P1.7 pin of the microcontroller U1 outputs a low level, the transistor Q1 is turned off, and the relay RL does not work; when the P1.7 pin of the car microcontroller U1 outputs a high level, the transistor U1 is turned on, making the relay RL work. The relay RL is the switch of the lighting equipment. When the relay is working, the current flows from the VCC through the fuse FU, the resistor R2, the relay RL and the sliding rheostat RV to the lighting equipment L, and the lighting equipment L lights up. When the relay does not work, no current flows through the lighting device L, and the lighting device L does not light up. The function of the sliding varistor RV is to adjust the current of the lighting device L. The sliding contact of the sliding varistor RV is connected with the steering wheel and moves with the rotation of the steering wheel. In the initial state, the sliding contact is located at the lowermost end of the sliding varistor RV. When the steering wheel is rotated, the sliding contact of the sliding varistor RV moves upward, and the larger the rotation angle is, the larger the current of the lighting device L is. When the steering wheel returns to the timing, the sliding contact of the sliding varistor RV rotates with it and is in the initial state again.
具体来说,所述照明设备为后视灯,安装在车辆两侧。后视灯具体安装在车轮上方的车架上,采用螺栓固定,主要用于照射车轮。通过利用后视灯提供光照,帮助驾驶员观察车辆后方是否有行人或者车辆的作用,同时也提醒了后方行人或者车辆注意前方车的行驶状态Specifically, the lighting equipment is a rear view lamp, which is installed on both sides of the vehicle. The rear-view light is specifically installed on the frame above the wheel, fixed with bolts, and is mainly used to illuminate the wheel. By using the rear view lamp to provide illumination, it helps the driver to observe whether there is a pedestrian or vehicle behind the vehicle, and also reminds the pedestrian or vehicle behind to pay attention to the driving state of the vehicle ahead
以下对该工程车照明设备自动控制系统的工作整体流程进行说明:The following describes the overall working process of the automatic control system for the lighting equipment of the construction vehicle:
初始状态:转向灯开关SW处于断开状态,光电隔离器U2中的发光二极管截止,此时输入单片机U1的P1.1引脚的信号为高电位信号。继电器不工作时,没有电流流过照明设备L,照明设备L不亮。U2滑动变阻器RV的滑动触头处于最下端。Initial state: The turn signal switch SW is in the off state, the light-emitting diode in the opto-isolator U2 is turned off, and the signal input to the P1.1 pin of the single-chip microcomputer U1 is a high-potential signal at this time. When the relay does not work, no current flows through the lighting device L, and the lighting device L does not light up. The sliding contact of U2 sliding varistor RV is at the lowermost end.
白天行车时:白天行车时,光敏电阻阻值较小,此时NPN型三极管Q1基极电压为低电平信号,三极管截止,则此时输入单片机U1的P1.0引脚的信号为高电位信号。单片机U1综合判断为否需要开启照明设备。When driving in the daytime: when driving in the daytime, the resistance of the photoresistor is small. At this time, the base voltage of the NPN transistor Q1 is a low-level signal, and the transistor is turned off, then the signal input to the P1.0 pin of the single-chip microcomputer U1 is a high potential at this time. Signal. The single-chip U1 comprehensively judges whether the lighting device needs to be turned on.
夜间行车时:夜间光强较暗,光敏电阻阻值较大,此时NPN型三极管Q1基极电压为高电平信号,三极管导通,则输入单片机U1的P1.0引脚的信号为低电位信号。当驾驶员开启转向灯时,转向灯开关SW闭合。此时光电隔离器U2中的发光二极管导通,此时输入单片机U1的P1.1引脚的信号为低电位信号。此时P1.0引脚和P1.4引脚同时输入低电位信号时,单片机U1判定为需要开启照明设备,则P1.7引脚输出高电平信号。此时三极管U1导通,使得继电器RL工作,电流从VCC流出经保险丝FU、电阻R2、继电器RL和滑动变阻器RV到照明设备L,照明设备L点亮。当方向盘转动时,滑动变阻器RV的滑动触头向上移动,转角越大,照明设备L的电流越大。通过照明设备L提供的照明,驾驶员可以清楚得观察车辆周边环境,同时也提醒了周围施工人员以及作业车辆注意到车辆的行驶状态。When driving at night: the light intensity is dark at night, and the resistance value of the photoresistor is large. At this time, the base voltage of the NPN transistor Q1 is a high-level signal, and the transistor is turned on, then the signal input to the P1.0 pin of the microcontroller U1 is low. potential signal. When the driver turns on the turn signal, the turn signal switch SW is closed. At this time, the light-emitting diode in the photoelectric isolator U2 is turned on, and the signal input to the P1.1 pin of the single-chip microcomputer U1 is a low-level signal at this time. At this time, when the P1.0 pin and the P1.4 pin input a low-level signal at the same time, the microcontroller U1 determines that the lighting device needs to be turned on, and the P1.7 pin outputs a high-level signal. At this time, the transistor U1 is turned on, making the relay RL work, and the current flows from the VCC through the fuse FU, the resistor R2, the relay RL and the sliding varistor RV to the lighting device L, and the lighting device L is lit. When the steering wheel is rotated, the sliding contact of the sliding varistor RV moves upward, and the larger the rotation angle is, the larger the current of the lighting device L is. Through the lighting provided by the lighting device L, the driver can clearly observe the surrounding environment of the vehicle, and at the same time, it also reminds the surrounding construction personnel and operating vehicles to pay attention to the driving state of the vehicle.
需要说明的是,本实施例结合现有工程车辆已配备的硬件资源,再外加一个照明设备,通过硬件电路设计判定驾驶员转向意图,并在汽车夜间转向时自动开启照明设备,能够起到提醒驾驶员观察车辆后方路况的作用,同时也提醒周围施工人员以及作业车辆注意到车辆的行驶状态。It should be noted that this embodiment combines the hardware resources already equipped with the existing engineering vehicles, plus an additional lighting device, determines the driver's steering intention through the hardware circuit design, and automatically turns on the lighting device when the car turns at night, which can act as a reminder. The driver observes the role of the road behind the vehicle, and also reminds the surrounding construction personnel and operation vehicles to pay attention to the driving state of the vehicle.
以上所述仅为本实用新型的较佳实施例,并不用以限制本实用新型,凡在本实用新型的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本实用新型的保护范围之内。The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model.
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