摘要
本系统以TI公司的超低功耗MCU MSP430处理器为核心,CPU(MSP430)根据光敏电阻所反应的不同电压值经相应程序对两个步进电机进行控制,进而由步进电机带动激光笔进行左右和上下精确定位,实现对光源的跟踪并对检测电压进行实时显示。LM317典型恒流源电路实现LED电流在150￣350mA范围内可调,从而调节LED灯光的强弱。整个系统很好的完成了规定范围内的点光源跟踪,并在光源亮度发生改变时具有较好的自适应性。
The system takes the low power consumption MCU TI company as the core, the CPU MSP430 processor （MSP430） controls two stepper motors according to the different response photoconductive resistance by the corresponding program voltage value, then it realize the illuminant of detection and tracking real-time display voltage by that the stepper motors drive laser pens and acculate positioning. LM317 typical constant-current source circuit implementes adjustable scope to adjust LED lights in 150-350mA. The whole system is very good completed within the specified range tracking and point light source in brightness changes, it has good adaptability.
出处
《自动化技术与应用》
2012年第1期68-71,共4页
Techniques of Automation and Applications
关键词
步进电机
MSP430
光敏电阻
恒流源
stepping motor
MSP430
photoconductive resistance
constant-current source
