本文提出一种通过变速PID 的控制策略用以控制OCXO 恒温槽的温度,该策略具有更大的灵活性,控制精度更高的优点,通过现场长时间的高低温例行实验表明,采用该方法能够很好的控制恒温槽的温度,实现槽内温度恒定的目的。 关键字:变速PID 控制系统 控温原理 测温电路 Abstract: The paper puts forward one kind of control strategy of shift PID in order to control the temperature of OCXO oven, which have excellency of heavy flexibility and control precision high, we put up high low-temperature customary experiment for a long time in scene, experiment indicate that adopting the way can control oven temperature very well and attain aim of trough temperature stable. Keywords: shift PID; control system; principle of control temperature; circuit of measure temperature