Dissertation > Excellent graduate degree dissertation topics show

The Hardware Design of Ultrasonic Testing System of Defects in Materials Based on Time Reversal Method

Author: LiuXuYin
Tutor: DongJingZuo
School: Harbin University of Science and Technology
Course: Communication and Information System
Keywords: Time reversal defect Nondestructive test Non-linear acoustics Lamb waves
CLC: TP274.53
Type: Master's thesis
Year: 2011
Downloads: 28
Quote: 0
Read: Download Dissertation

Abstract


With the increasing demand of efficiency and reliability of the industrial production detection and the qualitative description of the defect, the testing equipments available on the market can not fully meet these indexes. Thereby, it has far-reaching significance to design a kind of metal material defect detection system applying in the field of industrial production. according to the pulse echo technique appeared in the 1940s, and nonlinear acoustics and time reversal method in recent years, the perfect combination of both methods provides a new way of thinking for nondestructive testing of defects in materials.Based on the theory, a kind of equipment which owns arbitrary waveform generation and data acquisition is designed through the use of embedded technology in this paper. This System uses STM32 as a core processor; designs arbitrary waveform signal generator based on the MAX532 ,in order to be able to meet the comprehensive testing of metallic materials, the dual-channel system is designed. It can generate different output frequency and amplitude signals if needed, but also can set the synchronous output and asynchronous output;It uses the differential amplifier circuit to amplify power;The system uses piezoelectric crystal device as a transducer to detect sensor signals by adopting instrumentation amplifier AD524; It designs the active high pass filter with a sophisticated high-speed op amp LM318 at the core; It designs data acquisition module based on the AD9223. Due to the STM32 processor integrates a USB module, USB communication interface is used to communicate with the host computer in the system.In the design of software, it takes design method by modularizing. the master program design of continual inquire system, the program design of D/A conversion about arbitrary interruption occurred signal waveform, the design of collection on ultrasonic echo signal A/D conversion program and the design of USB data communication program are included,according to the function division

Related Dissertations

  1. Multi-currency Notes Technology Research and Implementation,TP391.41
  2. The Principle Research and Implement of the Acoustic Keyboard for Computer,TP334.23
  3. Experiments Study of BIO-OSS on PRP Composite Repairing Bone Defect around Metal Nail of Pure Titanium,R783.6
  4. Oral Health Epidemic Disease Sample Investigation and Its Influencialfactors Among Adult in the Nagarze County Shannan Prefecture Xizang Municipality,R78
  5. Experimental Study on Rat Sciatic Nerve Defect Repaired with Acellular Allograft Combined with Extracellular ATP,R651.3
  6. Administrative Supervision System Defects and Countermeasures,D630
  7. Preparation of graphene Defects,O613.71
  8. OCT in early diagnosis of primary glaucoma clinical application of,R775
  9. Alginate - chitosan membrane in guided bone regeneration in applied research,R318.08
  10. Design of Image Inspection Subsystem of the Horizontal Industrial CT-DR,TP391.41
  11. Fabrication, Defect Manipulation and Optical Properties of ZnO Hybrid Materials,TB33
  12. On the defects and countermeasures of juvenile offenders in the probation system,D925.2
  13. Defective auto product recall system deficiencies and improve,D922.29
  14. Research on the Drug Recall System in China,F203
  15. Experimental Research on Process Parameter Optimization for Selective Wave Soldering,TG425.1
  16. Woven Fabric Linear Research of Detection Based on AR Model,TP391.41
  17. Study on Nonwoven Fabric Defects Inspection,TP391.41
  18. Study on Defect Inspection of Flip Chip Based on Ultrasonic Excitation,TN407
  19. Study on the Influence of Various Defects on the Characteristics of Infrared Photonic Crystal Fiber,TN253
  20. The Research on Characteristics of Reconfigurable Optical Add/Drop Multiplexer Based on Photonic Crystals,TN929.1
  21. Based on active infrared and ultrasound scan flip-chip Defects Detection,TN407

CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Data processing, data processing system > Automatic detection system using a variety of new technologies > Ultrasonic testing equipment
© 2012 www.DissertationTopic.Net  Mobile