手动扫描超声探伤系统设计及信息可视化研究

发布时间：2018-02-27 09:34

本文关键词： 手动扫描金属薄板超声检测位移传感器信息可视化　出处：《中北大学》2017年硕士论文　论文类型：学位论文

【摘要】：根据项目要求开发一套手动扫描超声探伤系统,实现对金属薄板的实时超声无损检测。在逐点检测金属薄板的过程中,使用位移传感器记录手持超声探头的运动轨迹,结合对应检测点的超声波信号,生成检测区域的声学特性分布灰度图,从而对金属薄板在预定寿命期间的可靠性做出评估。本文结合实际项目需求和开发过程,在介绍检测系统关键技术的基础上,针对超声检测系统中定位装置和信息可视化处理展开了研究。首先,论文概括了国内外超声检测技术及检测设备的发展现状,阐述了本文的主要研究内容和研究意义。针对金属薄板的特点,介绍了超声检测的声学基础和探头定位的理论基础,确定了横波脉冲反射法和光电鼠标定位探头的检测方案。其次,具体介绍了检测系统设计方案和开发过程:超声检测系统模块以FPGA为控制核心,实现对超声波的发射和接收、信号采集以及USB通信的控制;定位系统模块通过编写HID类底层过滤驱动程序将USB光电鼠标改造成为一个位移传感器,实现快速、准确定位扫描检测过程中超声探头位置。最后,论文介绍了在VS环境下开发的上位机软件。上位机软件通过对超声检测系统模块和定位系统模块的识别和控制,获得超声回波信号数据和位置信息。进一步分析处理数据后,得出判伤结果并生成检测区域声学特性分布的灰度图。
[Abstract]:According to the requirements of the project, a manual scanning ultrasonic flaw detection system is developed to realize real-time ultrasonic nondestructive testing of metal sheet. In the process of spot by point inspection of metal sheet, displacement sensor is used to record the moving track of hand-held ultrasonic probe. Combined with the ultrasonic signal of the corresponding detection point, the acoustic characteristic distribution grayscale map of the detection area is generated, and the reliability of the metal sheet during the predetermined life period is evaluated. In this paper, the actual project requirements and the development process are combined with the evaluation of the reliability of the sheet metal. Based on the introduction of the key technologies of the detection system, the research on the positioning device and information visualization processing in the ultrasonic detection system is carried out. Firstly, the paper summarizes the development status of the ultrasonic detection technology and the testing equipment at home and abroad. The main research contents and significance of this paper are described. According to the characteristics of metal sheet, the acoustic basis of ultrasonic detection and the theoretical basis of probe positioning are introduced. The detection scheme of the S-wave pulse reflection method and the photoelectric mouse positioning probe is determined. Secondly, the design scheme and the development process of the detection system are introduced in detail. The ultrasonic detection system module uses FPGA as the control core to realize the ultrasonic transmitting and receiving. Signal acquisition and USB communication control; the positioning system module transforms the USB photoelectric mouse into a displacement sensor by writing the HID class bottom filter driver to realize the fast and accurate location of the ultrasonic probe in the process of scanning detection. Finally, This paper introduces the software of upper computer developed in vs environment. By the identification and control of ultrasonic detection system module and positioning system module, the upper computer software obtains ultrasonic echo signal data and position information. After further analysis and processing of the data, the upper computer software obtains the ultrasonic echo signal data and the position information through the identification and control of the ultrasonic detection system module and the positioning system module. The result of judgment is obtained and the gray image of acoustic characteristic distribution of detection area is generated.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB559

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