Methods and arrangement for the determination of crack depths in ultrasonic nondestructive testing

1979 ◽  
Vol 66 (5) ◽  
pp. 1574-1574
Author(s):  
Hermann Wüstenberg ◽  
Eduard Schulz
Keyword(s):  
Nondestructive Testing ◽  
Ultrasonic Nondestructive Testing

Determination of Flaw Type and Location Using an Expert Module in Ultrasonic Nondestructive Testing for Weld Inspection

2011 ◽  
Author(s):  
D. Shahriari ◽  
A. Zolfaghari ◽  
F. Masoumi ◽  
Francisco Chinesta ◽  
Yvan Chastel ◽  
...  
Keyword(s):  
Nondestructive Testing ◽  
Ultrasonic Nondestructive Testing ◽  
Weld Inspection ◽  
Flaw Type

Graphic Display for Ultrasonic Nondestructive Testing

1972 ◽  
pp. 299-315
Author(s):  
Morio Onoe ◽  
Mikio Takagi ◽  
Taketoshi Masumoto ◽  
Nobuo Hamano
Keyword(s):  
Nondestructive Testing ◽  
Ultrasonic Nondestructive Testing ◽  
Graphic Display

Pre-grading of spruce logs containing frozen and unfrozen water by means of frequency-based nondestructive testing (NDT)

Holzforschung ◽  
2016 ◽  
Vol 70 (1) ◽  
pp. 79-85 ◽  
Author(s):  
Julia K. Denzler ◽  
Andreas Weidenhiller
Keyword(s):  
Nondestructive Testing ◽  
Moisture Content ◽  
Industrial Application ◽  
Modulus Of Elasticity ◽  
Dynamic Modulus ◽  
The State ◽  
Temperature Measurements ◽  
Unfrozen Water ◽  
State Of Matter

AbstractThe possibility for pre-grading of logs throughout the year has been evaluated based on dynamic modulus of elasticity (MOEdynor simplifiedEdyn) by means of frequency-based nondestructive testing (NDTfreq). The challenge is thatEdynis variable in the frozen, partly frozen, and unfrozen states of logs (state of matter). In the unfrozen state, NDTfreqis reliable if the moisture content does not fall below fiber saturation. The state of the matter was tested via temperature measurements of air and log by means of an infrared technique and sensors, and information was evaluated from NDTfreq. The temperature measurements proved to be inefficient for industrial application because of unreliable data and long measurement times, whereas the NDTfreqmeasurements allowed the determination of meaningful damping factors. A sufficient level of predictability for more than 60% of the measurements was found. The log measurements in the partly frozen state are inconclusive becauseEdyndata fluctuate in the presence of both liquid and frozen water. For the completely frozen logs, a correction is introduced as a precaution that avoids an overestimation ofEdynin the unfrozen state.

Acousto-Ultrasonic Technology for Nondestructive Evaluation of Concrete Bridge Members Strengthened by Carbon Fiber–Reinforced Polymer

2005 ◽  
Vol 1928 (1) ◽  
pp. 245-251 ◽  
Author(s):  
Mahmut Ekenel ◽  
Nestore Galati ◽  
John J. Myers ◽  
Antonio Nanni ◽  
Valery Godínez
Keyword(s):  
Carbon Fiber ◽  
Nondestructive Testing ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Ultrasonic Nondestructive Testing ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Wide Range ◽  
Cfrp Sheet ◽  
Carbon Fiber Reinforced

Carbon fiber–reinforced polymer (CFRP) composites have been used in a wide range of application areas in bridge rehabilitations because these materials are less affected by corrosive environmental conditions, are known to provide longer life, and require less maintenance. However, the quality control and quality assessment of these new rehabilitation systems should be further improved and standardized. A recent rehabilitation project that used CFRP laminates was done on a bridge in Dallas County, Missouri, by the Missouri Department of Transportation and the Center for Infrastructure Engineering Studies at the University of Missouri–Rolla. The acousto-ultrasonic nondestructive testing technology was performed to detect and image surface defects in the form of delaminations. These were intentionally formed at the CFRP sheet–concrete interface to investigate the ability of this technique. Acousto-ultrasonic nondestructive testing has shown the ability to detect and image the delaminations between CFRP sheet and concrete substrate.

The Hardware Design of Ultrasonic Flaw Detector Based on Single-Chip Microcomputer AT89C52

2013 ◽  
Vol 423-426 ◽  
pp. 2427-2430
Author(s):  
Wei Liu ◽  
Zhuo Lin Miao ◽  
Huan Xin Cheng ◽  
Li Cheng
Keyword(s):  
Nondestructive Testing ◽  
Research Work ◽  
Hardware Design ◽  
Flaw Detector ◽  
Ultrasonic Nondestructive Testing ◽  
Single Chip ◽  
Single Chip Microcomputer ◽  
Main Research ◽  
Ultrasonic Flaw Detector ◽  
Ultrasonic Flaw

Ultrasonic nondestructive testing is an important detection method in nondestructive testing field. It is widely used in steel manufacturing, machinery manufacturing, electronics manufacturing, aerospace and defense and other fields and departments to ensure production quality and safety. In this paper, the main research work and research results are as follows: analyze the principle of electromagnetic ultrasonic nondestructive testing and characteristic and the hardware design of ultrasonic flaw detector system based on single-chip microcomputer AT89C52. This paper laid a good foundation for more in-depth studies in the research of ultrasonic digital signal processing in future.

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