点光源跟踪系统的设计

以TI公司的单片机MSP430F149为核心,设计了一个点光源跟踪系统。该系统主要由白光LED驱动电路、光源检测、数据处理及跟踪控制4部分构成。单片机对光敏电阻检测到的光照强度进行处理,判断点光源的位置,跟踪算法通过PWM方式控制X/Y方向的两个步进电机转动,从而带动激光笔跟踪光源。实验结果表明,本系统能较好地跟踪光源并具有自适应性,在对太阳能的跟踪方面具有参考价值。

Design of Point Light Source Tracking System

Designs a point light source tracking system based on TI Company′s MCU MSP430F149. The system is composed of four parts：white LED driver circuit,light source detect-ing circuit,data processing and tracking control device. The MCU processes the data of light intensi-ty which detected with photosensitive resistances device,and two stepper motors moving in X/Y di-rection with PWM method,so as to make the laser pen track the light source. Introduces the working principle of the system,gives the hardware design circuit and part of mechanical structure,and elab-orates the key tracking algorithm. The experiment results show that this system can track the light source better and has self-adaptability;it has good reference value in the tracking of solar energy.