管材焊缝涡流探伤仪设计研究.docVIP

毕业设计（论文） 管材焊缝涡流探伤仪设计的研究 院 别 控制工程学院 专业名称 测控技术与仪器 班级学号 学生姓名 指导教师 2012年6月15日 管材焊缝涡流探伤仪设计的研究 摘 要 近年来，随着工业的不断发展，对产品的质量要求也不断的提高，钢管在国民经济中占有着重要的地位。为了提高管材产品的质量、降低劳动强度、减少工业应用事故，就要对管材进行无损检测。无损检测是在不破坏管材的前提下，检查工件宏观缺陷或测量工件特征的各种技术方法的统称。无损检测是工业生产中实现提高质量、改进工艺和提高劳动生产率、节约原材料的重要手段，也是设备安全运行的重要监测手段。 涡流检测作为五大无损检测手段之一，其检测快速、成本低、易于实现自动化检测，应用于非铁磁性管子，已是非常成熟的技术，它不单能探测出缺陷，并可以利用阻抗平面技术分析出缺陷所在的位置与深度。然而涡流检测也存在其局限性，如将它简单地应用于铁磁性材料的管材，涡流只能集中在表面，无法渗透到材料的内部，得不到预期的结果，这就提出如何使用最佳参数进行管材焊缝涡流检测这一课题。 本设计根据制管控制工艺要求，首先采用单片机作为控制器，进行控制装置的硬件电路设计，应用程序的设计，其次，进行模拟调试。分别设计了涡流检测电路，采集与处理电路，键盘显示电路、控制电路等。 关键词：涡流检测，工业制管，无损检测 Research on eddy current flaw detector on Steel Pipe Abstract Along with industrial continuous development, the requirement of product’s quality is higher and higher, steel pipe take a important part in industrial. With the view of improving steel pipe’s product’s quality, lowering the labour intensity, and minimizing industrial accidents, we must have an automatic crack testing. Non-destructive testing due to defective and change by using some physical quantities of materials, measuring the change, so as to judge the existence of defects within the material.Non-destructive testing is to achieve the control of quality in the industrial production, save raw materials,improve process and improve the labor productivity of important means, but is also an important means of monitoring the safe operation of equipment. Eddy current testing is one of the five conventional methods of detection for the fast detection speed , very suitable for the detection of conductive surface and near the surface crack. However, the eddy current testing also has its limitations, such as is vulnerable to detection parameters affect false defect signal, prone to error detection.It is proposed how to use the best parameters for the task bar surface eddy current crack detection. According to the p