摘要
信号处理系统中,经常会遇到射频信号和光信号的相互转换,由于光信号波长和温度有关,如果不精确控制系统温度,在光信号和射频信号转换过程中会引入误差。本文讨论了闭环温度控制原理,并以TMS320F2812为核心实现该系统,采用电桥采样温度变化,并使用PID算法进行闭环控制,输出脉冲调制波,使用DRV592进行功率放大,控制热电制冷器工作,达到调节温度的目的。该系统精度可达0.0006℃,响应时间为14-16s。
This paper presents a thermoelectric cooler system which consists of a Texas Instruments TMS320F2812 digital signal processor (DSP). The DSP implements a digital PIE) feedback controller using an integrated 12-bit AD converter to read the thermistor, and directs output of PWM waveforms to the H-bridge DRV592 power amplifier. The closed-loop TEC system is seen to achieve ±0. 000 6 ℃ temperature accuracy, with a step response settling time of 15 to 16 seconds.
出处
《电子测量技术》
2007年第2期146-148,共3页
Electronic Measurement Technology