scholarly journals 3D Internal Visualization of Concrete Structure Using Multifaceted Data for Ultrasonic Array Pulse-Echo Tomography

Sensors ◽  
2021 ◽  
Vol 21 (19) ◽  
pp. 6681
Author(s):  
Hungjoo Kwon ◽  
Changbin Joh ◽  
Won Jong Chin
Keyword(s):  
Evaluation Method ◽  
Ultrasonic Pulse ◽  
Evaluation Tool ◽  
Limited Budget ◽  
Pulse Peak ◽  
Synthetic Aperture Focusing ◽  
Synthetic Aperture Focusing Technique ◽  
Pulse Echo ◽  
Structure Evaluation ◽  
Non Destructive

This research proposes a 3D internal visualization using ultrasonic pulse-echo tomography technique to evaluate accurately the state of concrete structures for their efficient maintenance within a limited budget. Synthetic aperture focusing technique (SAFT) is used as a post-processing algorithm to manipulate the data measured by the ultrasonic pulse-echo technique. Multifaceted measurements improve the weakness of the existing ultrasonic pulse-echo tomography technique that cannot identify the area beyond a reflector as well as the area located far away from measuring surfaces. The application of apodization factor, pulse peak delay calibration and elimination of trivial response not only complements the weaknesses of the SAFT algorithm but also improves the accuracy of the SAFT algorithm. The results show that the proposed method reduces the unnecessary surface noise and improves the expressiveness of the reflector’s boundaries on the resulting images. It is expected that the proposed 3D internal visualization technique will provide a useful non-destructive evaluation tool in combination with another structure evaluation method.

ULTRASONIC IMAGING SYSTEM USING A 2D ENVELOPE BEAMFORMING TECHNIQUE: IN-HOMOGENEITIES LOCATION

2004 ◽  
Vol 12 (04) ◽  
pp. 571-585
Author(s):  
L. MEDINA ◽  
E. MORENO
Keyword(s):  
Imaging System ◽  
Side Lobe ◽  
Ultrasonic Pulse ◽  
Image Resolution ◽  
Synthetic Aperture ◽  
Water Tank ◽  
Synthetic Aperture Focusing ◽  
Longitudinal Resolution ◽  
Synthetic Aperture Focusing Technique ◽  
Beamforming Technique

An algorithm has been developed to implement synthetic aperture focusing technique for B-scan. This is made at a several transmitter/receiver locations to form a map of ultrasonic reflectivity on the insonified region, considering the path travelled by the ultrasonic pulse from the transducer to the target and back again. To reconstruct the image, a time domain beam-former is applied to the envelope of the detected signals. This method minimizes the side-lobe amplitude and the restriction of λ/2 distance between two adjacent transducer positions can be neglected without loosing image resolution. The present work is focused on the location of the in-homogeneities, caused by the presence of a phantom immersed in a water tank. The results are presented when the distance between two adjacent transducer positions are varied from 0.5λ to 2.5λ showing that the longitudinal resolution is not affected but the lateral resolution becomes poorer when the distance is about 2λ. The error in the longitudinal location of in-homogeneities is within the minimum detectable distance of the system, while the lateral location error is increased when the distance between any two adjacent transducer positions is larger than 1.5λ.

Classification of Iron Meteorites with High Frequency Ultrasonic Waves

2019 ◽  
Vol 24 (2) ◽  
pp. 277-284
Author(s):  
Dris El Abassi ◽  
Bouazza Faiz ◽  
Abderrahmane Ibhi ◽  
Idris Aboudaoud
Keyword(s):  
Phase Velocity ◽  
Acoustic Impedance ◽  
Nickel Content ◽  
Normal Incidence ◽  
Ultrasonic Pulse ◽  
Ultrasonic Waves ◽  
Iron Meteorites ◽  
Acoustic Transducer ◽  
Pulse Echo ◽  
Non Destructive

We present the results of an ultrasonic pulse-echo technique and its potential to classify iron meteorites into hexahedrites, octahedrites and ataxites by determining their acoustic impedance and phase velocity. Our technique has been adapted from those used in the field of ultrasonic non-destructive investigation of a variety of materials. The main advantage of our technique is that it does not need any preparation of the meteorites like cutting and etching and therefore is rapid, easy and non-destructive. In essence, a broadband acoustic transducer is used in a monostatic pulse-echo configuration which means that both the transducer and the meteorite sample are located in a water bath and adjusted in the way that the ultrasonic pulse shit the meteorite sample at normal incidence. Then the reflected pulses from the front and rear faces of the meteorite sample are measured with the emitting transducer, digitally recorded and processed to analyze the signal. After Fourier transforming the echoed pulses from the front and the rear face of the meteorite sample, the calculated reflection coefficients yield the phase velocity and the acoustic impedance. Our study investigates a variety of iron meteorites collected in Morocco and other countries and it helps to understand how the nickel content of these meteorites affects the acoustic impedance. It reveals that the acoustic impedance of iron meteorites increases with increasing nickel content, so that a further refinement of our technique might have the potential to classify iron meteorites directly and reliably into hexahedrites, octahedrites and ataxites without destroying them.

scholarly journals A sound approach: Exploring a rapid and non-destructive ultrasonic pulse echo system for vegetable oils characterization

2019 ◽  
Vol 125 ◽  
pp. 108552 ◽  
Author(s):  
Jing Yan ◽  
William M.D. Wright ◽  
James A. O'Mahony ◽  
Yrjö Roos ◽  
Eric Cuijpers ◽  
...  
Keyword(s):  
Vegetable Oils ◽  
Ultrasonic Pulse ◽  
Pulse Echo ◽  
Non Destructive

Laser-Ultrasonic Non-Destructive Detection Based on Synthetic Aperture Focusing Technique

2018 ◽  
Vol 45 (9) ◽  
pp. 0904003 ◽  
Author(s):  
李俊燕 Li Junyan ◽  
沈中华 Shen Zhonghua ◽  
倪晓武 Ni Xiaowu ◽  
袁玲 Yuan Ling ◽  
倪辰荫 Ni Chenyin
Keyword(s):  
Synthetic Aperture ◽  
Laser Ultrasonic ◽  
Synthetic Aperture Focusing ◽  
Synthetic Aperture Focusing Technique ◽  
Non Destructive

THE FEATURES OF NON-DESTRUCTIVE INSPECTION OF CARBON FIBER REINFORCED PLASTIC SOLID LAMINATE SAMPLES DURING LOW-CYCLIC FATIGUE TESTING

2020 ◽  
pp. 108-115
Author(s):  
A.S. Boychuk ◽  
◽  
I.A. Dikov ◽  
A.S. Generalov ◽  
S.I. Yakovleva ◽  
...  
Keyword(s):  
Fatigue Testing ◽  
Ultrasonic Inspection ◽  
Cyclic Fatigue ◽  
Ultrasonic Pulse ◽  
Back Wall ◽  
Testing Specimen ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Pulse Echo ◽  
Non Destructive

The results of CFRP samples ultrasonic inspection during low-cyclic fatigue testing are given in this article. It is established that for ultrasonic pulse-echo inspection during cycling mechanical testing and after the special correction of flaw detector’s gain and inspection’s sensitivity concerning back-wall echo decreasing in compare with testing specimen is necessary.

scholarly journals Structural Audit of Old Building And It's Strengthening : Review

2020 ◽  
pp. 563-566
Author(s):  
Monis Azhar Ansari ◽  
Shrikant Solanke ◽  
Aashish Soni
Keyword(s):  
Human Life ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Rebound Hammer ◽  
Destructive Test ◽  
Prone Area ◽  
Pulse Echo ◽  
Non Destructive ◽  
Pulse Echo Method

We are building the structures rapidly in the area where there is requirement of the structures. Every structure has its own service life. Every structure is designed by assuming its life of existence. Some of the structures gets more life than expected and some gets fail in achieving its life. Any technology or material has its limitation to withstand. Many of the structures of R.C.C. are located in Seismic prone area. The structures gets damaged due to earthquake and the structures which becomes old should be checked that whether it has the strength of existence or not. The structures should be audited timely for the safety of the human life as well as for the nearby structures. The structures can be checked by various methods of Non-Destructive Test (Rebound Hammer Test, Ultrasonic Pulse Velocity Method, Pulse Echo Method, Probe Penetration Test, Destructive Test. Rebound Hammer Test of Non-Destructive Test is used in this paper to check the strength of an institutional building. When examining the structure, this paper aims to expand the life of structure. Different techniques of Retrofitting is given to the structural member which is unsafe. By applying the retrofitting, the structure can be made safe.

scholarly journals Non-destructive Evaluation of Voids in Kamaboko by an Ultrasonic Pulse Echo Technique.

1994 ◽  
Vol 41 (12) ◽  
pp. 897-903 ◽  
Author(s):  
Rikuo TAKAI ◽  
Tooru SUZUKI ◽  
Tomoo MIHORI ◽  
Seigi CHIN ◽  
Yumiko HOCCHI ◽  
...  
Keyword(s):  
Ultrasonic Pulse ◽  
Non Destructive Evaluation ◽  
Pulse Echo ◽  
Non Destructive

scholarly journals Evaluation of innovative technology market potential on the basis of technology audit

2019 ◽  
Vol 15 (2) ◽  
pp. 30-41
Author(s):  
Oleksandra Kosenko ◽  
Victoriia Cherepanova ◽  
Iryna Dolyna ◽  
Viktoriia Matrosova ◽  
Olena Kolotiuk
Keyword(s):  
Business Processes ◽  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Market Potential ◽  
Innovation Activity ◽  
Innovative Technology ◽  
Evaluation Tool ◽  
Enterprise Innovation ◽  
Technology Market ◽  
Structure Evaluation

Enterprise innovation activity supposes coordinated technical and business processes of decision-making and its performance required for successful transformation of new product or service from concept to market. The purpose of this study is to develop valuation methods of innovative technology market potential and prospects of their introduction into the production enterprise activity. In order to achieve this goal, we used brand new evaluation tool, this is technology audit conception, application of which increased significantly the accuracy and reliability of technology market potential evaluation. Clarification of terminological essence of technological audit allowed the authors to discover the content of technology audit components required for the market research and thereupon to develop evaluation mechanism for innovative technology market potential using technology audit. This mechanism is built on structure evaluation table of technology market potential level detection as an object of commercialization. To ensure the efficiency of practical effect of the mechanism proposed, the authors systematized and completed methods of functional analysis and scanning of market environment for the purpose of qualitative comprehensive evaluation and innovative technology market potential forecasting.Introduction of the proposed evaluation method for technology market potential will result in the improvement of efficiency of enterprise innovation activity due to more rational distribution of available resources and immediate financing of developments with greater market potential.

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