基于MSP430单片机的光电跟踪伺服系统的研究  

Research on photoelectric tracking servo system based on MSP430 MCU

作　　者：何婷婷[1] 郭建强[1] 李游[1] 李芳[1] 殷凯[1] 

机构地区：[1]西南交通大学物理科学与技术学院,四川成都610031

出　　处：《现代电子技术》2013年第16期143-145,148,共4页Modern Electronics Technique

基　　金：国家大学生科研训练计划(201210613061)

摘　　要：MSP430系列单片机已广泛应用于许多数字电子控制领域。研究设计中利用光敏感器件对特定光波长范围的光信号敏感原理,将四象限光电位置探测器与MSP430系列单片机相结合,根据四象限光电探测器输出电压与光斑位置的线性关系,通过数字PID闭环控制输出电压调节单片机输出PWM的占空比来实现精确稳定的搜寻和小范围跟踪目标。研究中利用MSP430F169单片机低功耗、功能完善的特点,配合地动仪式机械结构,实现了一套结构简单,功能丰富,结果稳定精确的实验研究类光电跟踪伺服系统。The MSP430 MCU has been widely used in many digital electronic control fields.The sensitive principle that the photosensitive device is sensitive to the light signal in a certain wavelength was utilized in the photoelectric tracking system design to combine the four-quadrant optical position detector with the MSP430 MCU.According to the linear relationship between the four-quadrant photodetector output voltage and light spot position,the output voltage is controlled by the digital PID closed-loop to regulate the duty cycle of micro-controller output PWM to achieve precise and stable search and small-scale target tracking.An optoelectronic tracking servo system applied to experimental study was realized by utilizing the characteristics of MSP430F169 micro-controller＇ s low power consumption,perfect function and seismograph type mechanical structure.It has the advantages of simple structure,full function,running stability and tracking accuracy.

关 键 词：光敏器件 PWM波 PID闭环控制 MSP430单片机 光电跟踪 

分 类 号：TN710-34[电子电信—电路与系统]