Monitoring viscosity in asphalt binders using an ultrasonic guided wave approach

2015 ◽  
Author(s):  
Alexandra N. Haser ◽  
Megan E. McGovern ◽  
Behzad Behnia ◽  
William Buttlar ◽  
Henrique Reis
Keyword(s):  
Guided Wave ◽  
Asphalt Binders ◽  
Wave Approach ◽  
Ultrasonic Guided Wave

Monitoring viscosity in asphalt binders using an ultrasonic guided wave approach

2015 ◽  
Vol 57 (4) ◽  
pp. 212-220 ◽  
Author(s):  
A N Haser ◽  
M E McGovern ◽  
B Behnia ◽  
W Buttlar ◽  
H Reis
Keyword(s):  
Guided Wave ◽  
Asphalt Binders ◽  
Wave Approach ◽  
Ultrasonic Guided Wave

An ultrasonic guided wave approach for the inspection of overhead transmission line cables

2017 ◽  
Vol 122 ◽  
pp. 23-34 ◽  
Author(s):  
Mehmet K. Yücel ◽  
Mathew Legg ◽  
Vassilios Kappatos ◽  
Tat-Hean Gan
Keyword(s):  
Transmission Line ◽  
Guided Wave ◽  
Overhead Transmission Line ◽  
Wave Approach ◽  
Ultrasonic Guided Wave

Ultrasonic unilateral double-position excitation lamb wave defect detection and quantification method for ground electrode of transmission tower

2021 ◽  
pp. 1-15
Author(s):  
Kuan Ye ◽  
Kai Zhou ◽  
Ren Zhigang ◽  
Ruizhe Zhang ◽  
Chunsheng Li ◽  
...  
Keyword(s):  
Guided Waves ◽  
Power Transmission ◽  
Geometric Model ◽  
Guided Wave ◽  
Quantization Error ◽  
Dispersion Function ◽  
Stable Operation ◽  
Transmission Tower ◽  
Ultrasonic Guided Wave ◽  
Transmission Towers

The power transmission tower’s ground electrode defect will affect its normal current dispersion function and threaten the power system’s safe and stable operation and even personal safety. Aiming at the problem that the buried grounding grid is difficult to be detected, this paper proposes a method for identifying the ground electrode defects of transmission towers based on single-side multi-point excited ultrasonic guided waves. The geometric model, ultrasonic excitation model, and physical model are established, and the feasibility of ultrasonic guided wave detection is verified through the simulation and experiment. In actual inspection, it is equally important to determine the specific location of the defect. Therefore, a multi-point excitation method is proposed to determine the defect’s actual position by combining the ultrasonic guided wave signals at different excitation positions. Besides, the precise quantification of flat steel grounding electrode defects is achieved through the feature extraction-neural network method. Field test results show that, compared with the commercial double-sided excitation transducer, the single-sided excitation transducer proposed in this paper has a lower defect quantization error in defect quantification. The average quantization error is reduced by approximately 76%.

scholarly journals Phase-delayed laser diode array allows ultrasonic guided wave mode selection and tuning

2013 ◽  
Vol 113 (14) ◽  
pp. 144904 ◽  
Author(s):  
Pasi Karppinen ◽  
Ari Salmi ◽  
Petro Moilanen ◽  
Timo Karppinen ◽  
Zuomin Zhao ◽  
...  
Keyword(s):  
Laser Diode ◽  
Mode Selection ◽  
Wave Mode ◽  
Guided Wave ◽  
Diode Array ◽  
Laser Diode Array ◽  
Ultrasonic Guided Wave
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