scholarly journals Air-coupled ultrasonic time-of-flight measurement system using amplitude-modulated and phase inverted driving signal for accurate distance measurements

2009 ◽  
Vol 6 (21) ◽  
pp. 1516-1521 ◽  
Author(s):  
Katsuhiro Sasaki ◽  
Hiroyuki Tsuritani ◽  
Yoshitoshi Tsukamoto ◽  
Satoshi Iwatsubo
Keyword(s):  
Measurement System ◽  
Time Of Flight ◽  
Distance Measurements ◽  
Ultrasonic Time ◽  
Flight Measurement ◽  
Driving Signal

scholarly journals Study of ultrasonic thermometry based on ultrasonic time-of-flight measurement

AIP Advances ◽  
2016 ◽  
Vol 6 (3) ◽  
pp. 035006 ◽  
Author(s):  
Ruixi Jia ◽  
Qingyu Xiong ◽  
Lijie Wang ◽  
Kai Wang ◽  
Xuehua Shen ◽  
...  
Keyword(s):  
Time Of Flight ◽  
Ultrasonic Time ◽  
Flight Measurement

Construction of a time-of-flight measurement system to study the low energy positronium production

1999 ◽  
Vol 149 (1-4) ◽  
pp. 269-275 ◽  
Author(s):  
N.N Mondal ◽  
R Hamatsu ◽  
T Hirose ◽  
H Iijima ◽  
M Irako ◽  
...  
Keyword(s):  
Measurement System ◽  
Time Of Flight ◽  
Low Energy ◽  
Flight Measurement

scholarly journals Machine Learning Based Preprocessing to Ensure Validity of Cross-Correlated Ultrasound Signals for Time-of-Flight Measurements

2021 ◽  
Vol 40 (1) ◽  
Author(s):  
Simon Herter ◽  
Sargon Youssef ◽  
Michael M. Becker ◽  
Sarah C. L. Fischer
Keyword(s):  
Machine Learning ◽  
High Precision ◽  
Cross Correlation ◽  
Complex Structure ◽  
Time Of Flight ◽  
Industrial Applications ◽  
Ultrasonic Signals ◽  
Ultrasonic Time ◽  
Flight Measurement ◽  
Flight Measurements

AbstractHigh precision ultrasonic time-of-flight measurement is a well known part of non-destructive evaluation used in many scientific and industrial applications, for example stress evaluation or defect detection. Although ultrasonic time-of-flight measurements are widely used there are some limitations where high noise and distorted ultrasonic signals are conflicting with the demand for high precision measurements. Cross-correlation based time-of-flight measurement is one strategy to increase reliability but also exhibits some ambiguous correlation states yielding to wrong time-of-flight results. To improve the reliability of these measurements a new machine learning based approach is presented based on experimental data collected on tightened bolts. Due to the complex structure of the bolts the ultrasonic signal is influenced by boundary conditions of the geometry which lead to high number of the ambiguous cross-correlation results in practice. In this particular application, bolts are in practice evaluated discontinuously and without knowledge of the time-of-flight in the unloaded condition which prevents the use of all other available comparative preprocessing techniques to detect time-of-flight shifts. Three different preprocessing strategies were investigated based on variations in the bolting configurations to ensure a machine learning based model capable of predicting the state of the cross-correlation function for different bolting parameters. With this approach, we achieve up to 100% classification accuracy for both longitudinal and transversal ultrasonic signals under laboratory conditions. In the future the method should be extended to become more robust and be applicable in real-time for industrial applications.

A time-of-flight measurement system for the HADES wide-aperture dielectron spectrometer

2000 ◽  
Vol 43 (4) ◽  
pp. 435-452
Author(s):  
N. V. Rabin ◽  
D. A. Vasil'ev ◽  
S. V. Vladimirov ◽  
A. G. Nekhaev ◽  
V. T. Smolyankin ◽  
...  
Keyword(s):  
Measurement System ◽  
Time Of Flight ◽  
Wide Aperture ◽  
Flight Measurement

scholarly journals State Estimation Approach of Lithium-Ion Batteries by Simplified Ultrasonic Time-of-Flight Measurement

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 170992-171000 ◽  
Author(s):  
Hartmut Popp ◽  
Markus Koller ◽  
Severin Keller ◽  
Gregor Glanz ◽  
Reinhard Klambauer ◽  
...  
Keyword(s):  
State Estimation ◽  
Lithium Ion Batteries ◽  
Time Of Flight ◽  
Lithium Ion ◽  
Ultrasonic Time ◽  
Flight Measurement
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