智能发光二极管照明控制系统设计

Design of intelligent Light Emitting Diode lighting control system

为了提高发光二极管(LED)照明系统的智能化程度,介绍了一个以lpc2103为控制核心的设计方案。系统由主控制器和单元控制器构成,热释电红外传感器检测的人体移动信号,与光敏电阻检测的环境光强度信号送入PIC16F628a单片机,实现移动人体和环境光照强度检测。采用PT4115芯片,实现LED光源恒流驱动,运用脉冲宽度调制调光方式,使光照强度保持稳定,从而实现对LED照明的智能化控制。实验结果充分证明了系统方案的可行性、高效性和稳定性。

In order to improve the intelligence of Light Emitting Diode（LED） lighting system, the design of controller based on lpc2103 is introduced. The system is composed of the main controller and the unit controller. The pyroeleetric infrared sensor detects the signal of human body movements and the photosensitive resistance detects the light signal intensity of environment, both signals are then transmitted to the single chip microcomputer immediately to realize the detection. By using adjustable light chip PT4115, high power LED constant-current driver can be realized. The Pulse Width Modulation （PWM） can keep the light intensity stable. The controller communicates with other devices by the communication module. It has been proved that the proposed circuit system is simple, feasible, sensitive and manageable with low cost.