Dissertation > Excellent graduate degree dissertation topics show

Based on SCM and CPLD 's ultrasonic wood-based panels strength detection

Author: SunDaGen
Tutor: XiaoJiang
School: Beijing Forestry University
Course: Mechanical and Electronic Engineering
Keywords: Wood-based panels Modulus Ultrasonic wave Dynamic weighing NDT
CLC: TS67
Type: Master's thesis
Year: 2011
Downloads: 85
Quote: 0
Read: Download Dissertation

Abstract


With the increased demand for wood , the use of wood-based panels to replace the traditional use of wood sawn timber resources has become an important method , so the plywood -line strength NDT has important significance , but also improve the efficiency of a wood-based panels extremely important means. This article as a research object, analyzes the development of domestic and international , integrated application of ultrasonic NDT timber , lumber dynamic weighing technology and computer -line detection technology and other high-tech and related home and abroad , mature detection theory to design detection system. In this paper, for the processing core MCU and CPLD , CPLD for external counting , microcontroller for data processing to measure the propagation of ultrasonic velocity in wood-based panels ; dynamic weighing technology in the use of the average density of the detected sheet ; under elastic modulus and ultrasound in artificial board the propagation velocity and the relationship between the density of wood-based panels : Ev = p V speed 2 to calculate the elastic modulus of wood-based panels . And because the dynamic elastic modulus and the sheet has a positive correlation between the mechanical strength , and thus the sheet for grading . Obtained by studying the following results : ( 1 ) using ultrasound to detect plywood strength is indeed feasible. ( 2 ) use of soft rubber to replace the traditional plywood coupling agent can reduce pollution , and achieved good results. ( 3 ) using a combination of CPLD and MCU control mode can effectively improve the detection accuracy.

Related Dissertations

  1. Intrusion detection based on the ultrasonic echo envelope in the military security patrols,E919
  2. The Research of Attended Full Table Static and Dynamic Railway Weighing System,TH715.13
  3. Battle tanks in tank bottom detection technology,TE972
  4. Based on electromagnetic steel plates Stress Detection Technology,TG115.284
  5. Thin steel plate wave electromagnetic ultrasonic flaw detection technology research,TG115.284
  6. PTT / PET composite fibers and fabrics juxtaposed Elasticity,TS156
  7. Based on GPR Concrete Pavement Void Detection Technology,U416.216
  8. Prestressed concrete bridge damage detection and evaluation methods,U448.35
  9. Reinforced concrete structures interfacial debonding damage ultrasonic guided wave detection technology,TU375
  10. Study on Flaws Identification in Ultrasonic Nondestructive Test,TP274.53
  11. Study on Measurement of Solid Concentration and Sedimentation Velocity of Liquid Solid Tow Phases Flow,TQ021.1
  12. Study on PDF Control Based on 2DF in Electro-hydraulic Servo System for Hot-Pressing of Wood-Based Panel,TS653
  13. Glycerin coating on the atmospheric pressure plasma jet treatment ultrahigh modulus polyethylene impact study,TS195.5
  14. Researcher about Recovery of Aluminum in the Sludge from the Water Supply Plant by Affecting Together with the Acidic Way and Ultrasound,X703
  15. The Clinical Study of Left Ventricular Function in Patients with Rheumatic Mitral Regurgitation by Echocardicgraphy,R541.2
  16. ULTRASOUND massage therapy myofascial pain syndrome clinical observation,R686.3
  17. Ultrasonic Wave Combined with Triton X-100 Is Superior in Porcine Thoracic Aorta Acellular Tissue Scaffold Preparation,R318.08
  18. One kind of rockfill constitutive model and validation study,TV641.4
  19. Design of Auxiliaries Control System for the On-line Nondestructive Equipment of Steel Tube,TH878
  20. Experimental Study on Properties of Rubber Aggregate Plastic Concrete,TU528.41
  21. Preparation and Expriment of Biodiesel with Pistacia Chinensis Seed Oil,TE667

CLC: > Industrial Technology > Light industry,handicrafts > Wood processing industry,furniture manufacturing industry > Wood product standards and testing
© 2012 www.DissertationTopic.Net  Mobile