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为进一步提升LED照明灯具使用的舒适性,设计了一种能够实现多通道控制的照明系统,可对LED灯头照明强度进行无级调节。系统采用STM32F10x芯片作为核心控制器,利用STM32芯片内置PWM控制通道多的特点,实现多通道LED调光的功能;使用2.8寸触摸屏作为显示控制终端,并采用STem Win中间件开发用户交互程序。实验结果表明:通过调整各通道PWM信号,占空比由0~100%变化时,LED灯头的驱动电流呈线性变化,较好地实现了无级调光功能。
Abstract：In order to improve the comfort of the LED lamps, a multichannel dimming equipment is presented in this paper.LEDs can be adjusted to any level of lighting intensity with it. The STM32F10 x processor with many PWM multiplexed channels is chosen as the micro-controller. The MCU performs as a Pulse Width Modulation(PWM) source generator to realize dimming function. The graphical user interface(GUI) is designed by STem Win middleware and shown on a 2.8 inches touch screen. The experiment results show that the driver current through the LEDs has a linear relationship with the PWM duty ratio, from 0 to 100%. The device as a unlimited dimmer works fine.
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基本信息:
中图分类号:TM923.34
引用信息:
[1]郝彬,岳思轩,薛一民,等.多通道LED照明控制系统设计[J].天津职业技术师范大学学报,2016,26(02):22-25.
基金信息:
天津职业技术师范大学科研发展基金项目(KJ15-14)
2016-06-28
2016-06-28