基于PID控制的FTIR光谱仪伺服控制系统设计

Servo Control System of FTIR Spectrometer Based on PID Control

傅里叶变换红外(FTIR)光谱仪在环境和大气污染气体成分检测中起着非常重要的作用,其核心光学部件是迈克尔逊干涉仪。为实现干涉仪的平稳运动,保证光机扫描的稳定性和重复性,提出一种基于ATMEL89C52单片机的伺服控制系统,在激光干涉信号和白光干涉信号的配合下,通过PID控制,系统实现了比较匀速的扫描速度控制和精确的位置控制,满足光谱仪对干涉仪的运动要求。

Fourier transform infrared （FTIR） spectrometer takes significant role in monitoring the earth＇s environment and atmospheric pollution. Michelson interferometer is the main part of FTIR spectrometer. In order to provide uniform motion of the interferometer mirror, stability and repetitiveness of sampling, a servo system based on ATMEL89c52 single-chip is described. With the help of laser interference and white light interference, it achieves not only uniform velocity but also precise position through PID controlling, which satisfies the spectrometer＇s motion demand.