發(fā)布時間：2018-02-27 09:34

  本文關鍵詞： 手動掃描 金屬薄板 超聲檢測 位移傳感器 信息可視化　出處：《中北大學》2017年碩士論文　論文類型：學位論文

【摘要】：根據項目要求開發(fā)一套手動掃描超聲探傷系統,實現對金屬薄板的實時超聲無損檢測。在逐點檢測金屬薄板的過程中,使用位移傳感器記錄手持超聲探頭的運動軌跡,結合對應檢測點的超聲波信號,生成檢測區(qū)域的聲學特性分布灰度圖,從而對金屬薄板在預定壽命期間的可靠性做出評估。本文結合實際項目需求和開發(fā)過程,在介紹檢測系統關鍵技術的基礎上,針對超聲檢測系統中定位裝置和信息可視化處理展開了研究。首先,論文概括了國內外超聲檢測技術及檢測設備的發(fā)展現狀,闡述了本文的主要研究內容和研究意義。針對金屬薄板的特點,介紹了超聲檢測的聲學基礎和探頭定位的理論基礎,確定了橫波脈沖反射法和光電鼠標定位探頭的檢測方案。其次,具體介紹了檢測系統設計方案和開發(fā)過程:超聲檢測系統模塊以FPGA為控制核心,實現對超聲波的發(fā)射和接收、信號采集以及USB通信的控制;定位系統模塊通過編寫HID類底層過濾驅動程序將USB光電鼠標改造成為一個位移傳感器,實現快速、準確定位掃描檢測過程中超聲探頭位置。最后,論文介紹了在VS環(huán)境下開發(fā)的上位機軟件。上位機軟件通過對超聲檢測系統模塊和定位系統模塊的識別和控制,獲得超聲回波信號數據和位置信息。進一步分析處理數據后,得出判傷結果并生成檢測區(qū)域聲學特性分布的灰度圖。
[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.
【學位授予單位】：中北大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TB559

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