Evaluation of standing tree quality of Japanese cedar grown with different spacing using stress-wave and ultrasonic-wave methods

2001 ◽  
Vol 47 (4) ◽  
pp. 245-253 ◽  
Author(s):  
Shih-Tzu Chuang ◽  
Song-Yung Wang
Keyword(s):  
Ultrasonic Wave ◽  
Stress Wave ◽  
Japanese Cedar ◽  
Standing Tree ◽  
Tree Quality ◽  
Wave Methods

scholarly journals Development of Testing Platform and Comparison Studies for Wood Nondestructive Testing

2016 ◽  
Vol 2016 ◽  
pp. 1-7
Author(s):  
Jian Li ◽  
Yiming Fang ◽  
Jiyong Tang ◽  
Hailin Feng ◽  
Xiongwei Lou
Keyword(s):  
Nondestructive Testing ◽  
Stress Wave ◽  
Virtual Instrument ◽  
Wood Properties ◽  
Time Interval ◽  
Peak Time ◽  
Testing Platform ◽  
Time Interval Measurement ◽  
Nondestructive Testing Methods

Stress wave based techniques have been developed for evaluating the quality of the wooden materials nondestructively. However the existing techniques have some shortcomings due to the significant variation of the wood properties and are now in need of updating. There are also stress wave based instruments which have been widely used for nondestructive testing of wood. But most of them are inflexible and unsuitable for the tentative studies. This paper proposed and implemented a wood nondestructive testing platform based on NI virtual instrument. Three wood nondestructive testing methods, including peak time interval measurement, cross-correlation, and spectrum analysis, were also tested on this platform with serious decay sample, early decay sample, and defect-free sample. The results show that new methods can be verified easily and the researches of wood nondestructive testing will be accelerated with the designed platform.

Application of Stress Wave Reflection Method in Nondestructive Testing of Bolt

2012 ◽  
Vol 446-449 ◽  
pp. 2229-2233 ◽  
Author(s):  
Xian Kai Bao ◽  
Yi Li
Keyword(s):  
Nondestructive Testing ◽  
Stress Wave ◽  
Wave Reflection ◽  
Reflection Method ◽  
Testing Technique ◽  
The World ◽  
History Of ◽  
Estimate Quality

Bolt has been used widely in geoengineering all over the world in recent years, the testing technique of bolt develops quickly too. This paper summarizes simply the history of bolt testing technique, describes in detail stress wave reflection method. It is useful and valuable nondestructive.Testing method is verified with several parameters which estimate quality of bolting integrity.

Strength estimation of concrete masonry units using stress-wave methods

2018 ◽  
Vol 163 ◽  
pp. 518-528 ◽  
Author(s):  
Sikandar H. Sajid ◽  
Syed M. Ali ◽  
Nicholas J. Carino ◽  
Salman Saeed ◽  
Hizb Ullah Sajid ◽  
...  
Keyword(s):  
Stress Wave ◽  
Concrete Masonry ◽  
Wave Methods ◽  
Masonry Units

Evaluating the Compaction Quality of Backfills by Stress Wave Velocities

2011 ◽  
Vol 39 (5) ◽  
pp. 103428
Author(s):  
M. R. Mitchell ◽  
R. E. Link ◽  
Jiunnren Lai ◽  
Shengmin Wu ◽  
Chih-Hung Chiang
Keyword(s):  
Stress Wave ◽  
Wave Velocities

scholarly journals Effect of fexofenadine on the quality of life of Japanese cedar pollinosis patients

2004 ◽  
Vol 53 (3) ◽  
pp. 245-254 ◽  
Author(s):  
Kimihiro Okubo ◽  
Minoru Gotoh ◽  
Kenichi Shimada ◽  
Masayo Ritsu ◽  
Makoto Kobayashi ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Japanese Cedar ◽  
Japanese Cedar Pollinosis

scholarly journals Investigation of wooden sheet pile wall in an aggressive environment using non-destructive methods

2018 ◽  
Vol 251 ◽  
pp. 02038 ◽  
Author(s):  
Marek Wyjadłowski ◽  
Tomasz Nowak ◽  
Anna Karolak
Keyword(s):  
Ultrasonic Wave ◽  
Stress Wave ◽  
Sea Water ◽  
Water Environment ◽  
Sheet Pile ◽  
Strength Parameters ◽  
Comprehensive Information ◽  
Wave Technique ◽  
Non Destructive ◽  
Variable Water

The paper presents the study of the strength parameters of wood samples from the retaining structure, working for about 60 years in an aggressive sea water environment. Samples from the variable water level zone and situated in the watered ground were tested. Non-destructive examinations were performed using the following methods: the stress wave technique and the ultrasonic wave technique. The results presented below can lead to the conclusion that both methods: the stress wave by Fakopp Microsecond Timer device and the ultrasonic wave by Sylvatest Trio correspond with each other and result in similar outcomes. However, in order to obtain more detailed and comprehensive information on the elements properties, more research should be conducted.

scholarly journals Use of Stress Wave to Evaluate The Repair Quality of Concrete Crack

2017 ◽  
Vol 138 ◽  
pp. 02019 ◽  
Author(s):  
Keng-Tsang Hsu ◽  
Chia-Chi Cheng ◽  
Chih-Hung Chiang ◽  
Hung-Hua Wang
Keyword(s):  
Stress Wave ◽  
Concrete Crack
Sign in / Sign up

Export Citation Format

Share Document