detection and control system is designed and implemented.The system uses Pro/ E for
three-dimensional modeling，and pneumatic transmission system，combined with advanced control theory，took the PLC as its control system，to achieve the detection device control. Key words：detection devices；welding systems；pneumatic transmission；PLC 中图分类号：TP273 文献标识码：A 文章编号：1009－9492(2017)04－0027－02 第一作者简介：崔云龙，男，1983年生，山东泰安人，硕士研究生，工程师。研究领域：特种设备检验及无损检测。 (编辑：阮毅) DOI：10.3969/j.issn.1009-9492.2017.04.008 收稿日期：2016－10－31