針對(duì)溫度控制在塑料擠出中的重要性，本文介紹了以可編程序控制器為核心、采用智
能PID 算法和脈寬調(diào)制原理的擠出機(jī)溫度控制系統(tǒng)，并介紹了該系統(tǒng)的硬件組成及軟件編 程的方法和技巧。該溫控系統(tǒng)硬件簡(jiǎn)單、控溫精度高、性能穩(wěn)定，具有較高的實(shí)用價(jià)值。

?關(guān)鍵詞: 可編程序控制器；溫度控制；比例積分微分算法；脈寬調(diào)制

Application of PLC to Temperature Control System in Extruder YANG-Peng ZANG-Chunhua WEI-Lifeng (Information Engineering Institute, Shenyang Institute of Chemical Technology, Shenyang 110142, China) Abstract：A method of temperature control system adopting PID algorithm, PWM(pulse width modulation) theorem based on PLC is dealt with ,which is used in plastics extrusion machine .The hardware configuration and technology of software design are also given. The advantage of this method is its accuracy and reliability of temperature controlling.
Key words: PLC; temperature control; PID; pulse width modulation