【作者】 刘建超；

【导师】 刘晴岩；

【作者基本信息】 华东理工大学 ， 机械设计及理论， 2012， 硕士

【摘要】 论文围绕高速旋转多探头超声检测系统的开发进行研究。在对国内外棒材超声波检测技术的现状和发展趋势进行综合分析和比较的基础上,提出了针对棒材不同缺陷的超声波检测方案,同时详细说明了系统设计的基本原理和一些关键技术,并对棒材检测系统进行了动力学仿真。该系统利用水浸法超声检测,结合超声波的垂直入射纵波法和斜入射横波法,对棒材及其表面和近表面的轴向和横向缺陷进行检测。系统采用水浸聚焦探头进行检测,探头高速旋转,探头的超声波信号通过一个旋转耦合电容传送到检测仪器。在超声检测系统设计过程中,由于采用探头高速旋转的方式实施检测,检测系统的动平衡对系统性能有非常重要的影响。本文利用Pro/E对系统的各个零部件进行建模,通过MECHANISM/Pro将装配模型导入ADAMS软件。利用ADAMS/Auto Flex将转轴由刚性体转换成柔性体,并将柔性体导入到模型,并且对检测系统模型进行动力学仿真分析。通过对检测系统的平衡性仿真,得到仿真结果,并分析讨论仿真结果,探讨了检测系统由平衡性而引起的问题,为后续检测系统的设计开发提供理论基础。更多还原

【Abstract】 The High speed multi-probe ultrasonic testing system has been researched in this paper. Based on the generalized analysis to the development and tendency of domestic and abroad related technology, some ultrasonic testing methods for different defects were described in this paper. Simultaneously, the detailed principle of design and some essential technologies were presented.Water immersion ultrasonic testing method were used to in this system to test the bar. We use ultrasonic longitudinal wave and shear waves methods to test different defects in the bar. Water immersion focusing probes are used in this system, and the signal was transferred by rotary capacitors to the test instrument.High-speed rotary probes were used to test the defects by the bar detection system. And dynamic balance of the system is very important. A simulation model was established by Pro/Engineer. Then the simulation model was imported to ADAMS project software by using the interface module of Mech/Pro. The model was simulated by ADAMS. The problems that caused by the dynamic balance of the system will be discussed in this paper, and theoretical results will be provided for further design.更多还原