The invention belongs to the technical field of headlight control circuits, and particularly relates to a headlight control system and method for intelligently adjusting LED input voltage through PID, and the headlight control system for intelligently adjusting LED input voltage through PID comprises a single-chip microcomputer module, a switching power supply module, a constant current output module, an LED light source module and an input voltage detection module. When the LED light source module is powered on, the switching power supply module outputs the maximum set voltage to the LED light source module, so that the single-chip microcomputer module samples the LED voltage of the LED light source module through the input voltage detection module. The single-chip microcomputer module carries out PID adjustment on the actual output voltage of the switching power supply module according to the LED voltage, so that the actual output voltage and the rated working voltage of the constant current output module tend to zero. The LED voltage is monitored in real time, the output voltage of the switching power supply module is adjusted in a PID intelligent mode, the voltage difference on a linear chip is reduced, the power on the chip is reduced, and the problems that the LED voltage range is large, and the linear chip bears too high voltage are effectively solved.
本发明属于前灯控制电路技术领域,具体涉及一种PID智能调节LED输入电压的前灯控制系统及方法,本采用PID智能调节LED输入电压的前灯控制系统包括:单片机模块、开关电源模块、恒流输出模块、LED光源模块和输入电压检测模块;其中当LED光源模块上电时,开关电源模块向LED光源模块输出最大设定电压,以使单片机模块通过输入电压检测模块采样LED光源模块的LED电压;单片机模块根据LED电压对开关电源模块的实际输出电压进行PID调节,以使实际输出电压与恒流输出模块的额定工作电压趋于零;本发明通过实时监测LED电压,采用PID智能方式调节开关电源模块的输出电压,减小线性芯片上的压差,减小芯片上的功率,有效改善LED电压范围大,线性芯片承受过高电压的问题。
Headlamp control system and method for intelligently adjusting LED input voltage by PID (Proportion Integration Differentiation)
PID智能调节LED输入电压的前灯控制系统及方法
2023-06-23
Patent
Electronic Resource
Chinese
IPC: | H05B ELECTRIC HEATING , Elektrische Heizung / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein |
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