Applying quadraphonic transmission ultrasonic defectoscopy on standard aluminum materials

2015 ◽  
Vol 57 (1) ◽  
pp. 95-99 ◽  
Author(s):  
Zoran Ebersold ◽  
Nemanja Ćosović ◽  
Slobodan Đukić ◽  
Nebojša Mitrović ◽  
Dragiša Obradović
Keyword(s):  
Ultrasonic Defectoscopy

Remote ultrasonic defectoscopy of sound radiating objects through the air

2014 ◽  
Vol 60 (3) ◽  
pp. 304-308 ◽  
Author(s):  
D. Ya. Sukhanov ◽  
M. A. Kalashnikova
Keyword(s):  
Ultrasonic Defectoscopy

scholarly journals Signal-to-Noise Ratio Improvement based on the Discrete Wavelet Transform in Ultrasonic Defectoscopy

10.14311/606 ◽  
2004 ◽  
Vol 44 (4) ◽  
Author(s):  
V. Matz ◽  
M. Kreidl ◽  
R. Šmíd
Keyword(s):  
Wavelet Transform ◽  
Discrete Wavelet Transform ◽  
Signal To Noise Ratio ◽  
Time Shift ◽  
Discrete Wavelet ◽  
Signal To Noise ◽  
Noise Ratio ◽  
Zero Time ◽  
Ultrasonic Defectoscopy

In ultrasonic testing it is very important to recognize the fault echoes buried in a noisy signal. The fault echo characterizes a flaw in the material. An important requirement on ultrasonic signal filtering is zero-time shift, because the position of ultrasonic echoes is essential. This requirement is accomplished using the discrete wavelet transform (DWT), which is used for reducing the signal-to-noise ratio. This paper evaluates the quality of filtering using the discrete wavelet transform. Additional computer simulations of the proposed algorithms are presented.

The modernization problem for high-speed tracks and adaptation to EU standards

2019 ◽  
Vol 124 ◽  
pp. 9-17
Author(s):  
Marcin Chrzan
Keyword(s):  
High Speed ◽  
Satellite Navigation ◽  
Technical Parameters ◽  
Railway Line ◽  
Passenger Trains ◽  
Ultrasonic Defectoscopy ◽  
Original Concept ◽  
The Eu

The article will present aspects related to the construction (modernization) of railway lines in Poland on the example of the modernized section of the railway line E20 Warsaw-Terespol. The purpose of the modernization of this line was to adjust its technical parameters to the EU standards and requirements of AGC (European Agreement on Main International Railway Lines) and AGTC (European Agreement on Main International Combined Transport Lines and Associated Facilities) agreements, which provide for a maximum permissible speed of 160 km/h for steam passenger trains and 120 km/h for freight trains, with a permissible axle load of 22.5 tons. It will present the previous results of measurements on selected sections and the original concept of rail measurements using ultrasonic defectoscopy and satellite navigation.

Sign in / Sign up

Export Citation Format

Share Document