scholarly journals Fast, Robust, and Low-Cost Microwave Imaging of Multiple Non-Metallic Pipes

Electronics ◽  
2021 ◽  
Vol 10 (15) ◽  
pp. 1762
Author(s):  
Yuki Gao ◽  
Maryam Ravan ◽  
Reza K. Amineh
Keyword(s):  
Antenna Arrays ◽  
Oil And Gas ◽  
Imaging System ◽  
Imaging Techniques ◽  
Low Cost ◽  
Microwave Imaging ◽  
Airport Security ◽  
Destructive Testing ◽  
Security Screening ◽  
Industrial Sectors

The use of non-metallic pipes and composite components that are low-cost, durable, light-weight, and resilient to corrosion is growing rapidly in various industrial sectors such as oil and gas industries in the form of non-metallic composite pipes. While these components are still prone to damages, traditional non-destructive testing (NDT) techniques such as eddy current technique and magnetic flux leakage technique cannot be utilized for inspection of these components. Microwave imaging can fill this gap as a favorable technique to perform inspection of non-metallic pipes. Holographic microwave imaging techniques are fast and robust and have been successfully employed in applications such as airport security screening and underground imaging. Here, we extend the use of holographic microwave imaging to inspection of multiple concentric pipes. To increase the speed of data acquisition, we utilize antenna arrays along the azimuthal direction in a cylindrical setup. A parametric study and demonstration of the performance of the proposed imaging system will be provided.

scholarly journals Effect of Eccentricity in Microwave Imaging of Multiple Composite Pipes

2021 ◽  
Vol 15 ◽  
pp. 30-38
Author(s):  
Yuki Gao ◽  
Noshin Raisa ◽  
Reza Amineh
Keyword(s):  
Oil And Gas ◽  
Low Cost ◽  
Near Field ◽  
Oil And Gas Industry ◽  
Microwave Imaging ◽  
Destructive Testing ◽  
Material Loss ◽  
Gas Industry ◽  
Additional Imaging ◽  
Composite Pipes

The use of non-metallic composites that are durable, low cost, and lightweight is growing fast in various industries. A commonly used form of these materials is in the shape of pipes that can be used, for instance, in oil and gas industry. Such pipes can be damaged due to material loss (defects and holes), erosions, and more which may cause major production failures or environmental mishaps. To prevent these issues, non-destructive testing (NDT) methods need to be employed for regular inspections of such components. Since traditional NDT methods are mainly used for metallic pipes, recently microwave imaging has been proposed as a promising approach for examination of non-metallic pipes. While microwave imaging can be employed for inspection of multiple layers of pipes, the effect of undesired eccentricity of the pipes can impose additional imaging errors. In this paper, for the first time, we study the effect of eccentricity of the pipes on the images reconstructed using near-field holographic microwave imaging when imaging double pipes.

scholarly journals A Low-Cost and Compact Three-Dimensional Microwave Holographic Imaging System

Electronics ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 1036 ◽  
Author(s):  
Hailun Wu ◽  
Reza K. Amineh
Keyword(s):  
Imaging System ◽  
Low Cost ◽  
Three Dimensional ◽  
Cost Effective ◽  
Microwave Imaging ◽  
Destructive Testing ◽  
Holographic Imaging ◽  
Compact Size ◽  
Vector Network Analyzers ◽  
Network Analyzers

With the significant growth in the use of non-metallic composite materials, the demands for new and robust non-destructive testing methodologies is high. Microwave imaging has attracted a lot of attention recently for such applications. This is in addition to the biomedical imaging applications of microwave that are also being pursued actively. Among these efforts, in this paper, we propose a compact and cost-effective three-dimensional microwave imaging system based on a fast and robust holographic technique. For this purpose, we employ narrow-band microwave data, instead of wideband data used in previous three-dimensional cylindrical holographic imaging systems. Three-dimensional imaging is accomplished by using an array of receiver antennas surrounding the object and scanning that along with a transmitter antenna over a cylindrical aperture. To achieve low cost and compact size, we employ off-the-shelf components to build a data acquisition system replacing the costly and bulky vector network analyzers. The simulation and experimental results demonstrate the satisfactory performance of the proposed imaging system. We also show the effect of number of frequencies and size of the objects on the quality of reconstructed images.

Low-cost planar microwave imaging system

2015 ◽  
Vol 4 (4) ◽  
pp. 393-403
Author(s):  
Mohammad Asefi ◽  
Lutfi Albasha ◽  
Nasser Qaddoumi ◽  
Soudeh Heydari
Keyword(s):  
Imaging System ◽  
Low Cost ◽  
Microwave Imaging

scholarly journals Surface Wave Multipath Signals in Near-Field Microwave Imaging

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Paul M. Meaney ◽  
Fridon Shubitidze ◽  
Margaret W. Fanning ◽  
Maciej Kmiec ◽  
Neil R. Epstein ◽  
...  
Keyword(s):  
Surface Wave ◽  
Surface Waves ◽  
Antenna Arrays ◽  
Imaging Techniques ◽  
Near Field ◽  
Microwave Imaging ◽  
Feed Line ◽  
Receiving Antenna ◽  
Wave Effects ◽  
Multipath Signals

Microwave imaging techniques are prone to signal corruption from unwanted multipath signals. Near-field systems are especially vulnerable because signals can scatter and reflect from structural objects within or on the boundary of the imaging zone. These issues are further exacerbated when surface waves are generated with the potential of propagating along the transmitting and receiving antenna feed lines and other low-loss paths. In this paper, we analyze the contributions of multi-path signals arising from surface wave effects. Specifically, experiments were conducted with a near-field microwave imaging array positioned at variable heights from the floor of a coupling fluid tank. Antenna arrays with different feed line lengths in the fluid were also evaluated. The results show that surface waves corrupt the received signals over the longest transmission distances across the measurement array. However, the surface wave effects can be eliminated provided the feed line lengths are sufficiently long independently of the distance of the transmitting/receiving antenna tips from the imaging tank floor. Theoretical predictions confirm the experimental observations.

A low-cost, fast, and accurate microwave imaging system for breast cancer detection

2015 ◽  
Author(s):  
Daniele Jahier Pagliari ◽  
Azzurra Pulimeno ◽  
Marco Vacca ◽  
Jorge A. Tobon ◽  
Francesca Vipiana ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Cancer Detection ◽  
Imaging System ◽  
Low Cost ◽  
Microwave Imaging ◽  
Breast Cancer Detection

Modelling of small CFRP aerostructure parts for X-ray imaging simulation

2014 ◽  
Vol 5 (3) ◽  
pp. 227-240 ◽  
Author(s):  
Kristina Bliznakova ◽  
Zacharias Kamarianakis ◽  
Aris Dermitzakis ◽  
Zhivko Bliznakov ◽  
Ivan Buliev ◽  
...  
Keyword(s):  
Computational Model ◽  
Imaging Techniques ◽  
Low Cost ◽  
Cone Beam Ct ◽  
Carbon Fibres ◽  
Destructive Testing ◽  
Content Type ◽  
Visual Appearance ◽  
X Ray ◽  
X Ray Imaging

Purpose – The purpose of this paper is to develop a realistic computational model of carbon fibre reinforced polymer (CFRP) structures dedicated for in-silico investigations of the use of X-ray-based imaging techniques as non-destructive testing (NDT) of CFRP parts. Design/methodology/approach – CFRPs contain layers of carbon-fibres bundles within resin. Bundles’ orientation in the different layers is arranged with respect to each other at a well-defined primary direction. In the model, the bundle was simulated as a circular cylinder. The resulted model is a stack of layers of unidirectional bundles having orientation of 0°/90°/45°/−45°. Two CFRP structures were modelled: a flat CFRP part and a real shaped CFRP clip. A porous layer and non-carbon fibres were inserted within each model, respectively. X-ray projection images were generated with a dedicated simulation programme. Three setups were investigated: radiography, tomosynthesis and cone-beam CT (CBCT). Findings – Results showed that porosity and non-carbon fibres were visible with all X-ray-based techniques. Tomosynthesis and CBCT, however, provide higher quality image of defects. Practical implications – The CFRP computational model is a valuable tool in design, testing and optimization phase of X-ray-based imaging techniques for use in NDT of composite materials. Simulated images are generated within a short time; thus results from virtual optimization and testing are obtained very fast and at low cost. Originality/value – An innovative computational model of CFRP structures, dedicated for X-ray imaging simulations, has been developed. The model is characterized by simplicity in its creation and realistic visual appearance of the produced X-ray images.

scholarly journals A Low Cost and Portable Microwave Imaging System for Breast Tumor Detection Using UWB Directional Antenna array

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
M. T. Islam ◽  
M. Z. Mahmud ◽  
M. Tarikul Islam ◽  
S. Kibria ◽  
M. Samsuzzaman
Keyword(s):  
Dielectric Properties ◽  
Breast Tumor ◽  
Breast Imaging ◽  
Imaging System ◽  
Low Cost ◽  
Microwave Imaging ◽  
Dielectric Constants ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Breast Phantom

Abstract Globally, breast cancer is a major reason for female mortality. Due to the limitations of current clinical imaging, the researchers are encouraged to explore alternative and complementary tools to available techniques to detect the breast tumor in an earlier stage. This article outlines a new, portable, and low-cost microwave imaging (MWI) system using an iterative enhancing technique for breast imaging. A compact side slotted tapered slot antenna is designed for microwave imaging. The radiating fins of tapered slot antenna are modified by etching nine rectangular side slots. The irregular slots on the radiating fins enhance the electrical length as well as produce strong directive radiation due to the suppression of induced surface currents that radiate vertically at the outer edges of the radiating arms with end-fire direction. It has remarkable effects on efficiency and gain. With the addition of slots, the side-lobe levels are reduced, the gain of the main-lobe is increased and corrects the squint effects simultaneously, thus improving the characteristics of the radiation. For experimental validation, a heterogeneous breast phantom was developed that contains dielectric properties identical to real breast tissues with the inclusion of tumors. An alternative PC controlled and microcontroller-based mechanical MWI system is designed and developed to collect the antenna scattering signal. The radiated backscattered signals from the targeted area of the human body are analyzed to reveal the changes in dielectric properties in tissues. The dielectric constants of tumorous cells are higher than that of normal tissues due to their higher water content. The remarkable deviation of the scattered field is processed by using newly proposed Iteratively Corrected Delay and Sum (IC-DAS) algorithm and the reconstruction of the image of the phantom interior is done. The developed UWB (Ultra-Wideband) antenna based MWI has been able to perform the detection of tumorous cells in breast phantom that can pave the way to saving lives.

scholarly journals Textile Monopole Sensors for Breast Cancer Detection

2021 ◽  
Author(s):  
Dalia Mohamed N M K Elsheakh ◽  
Soha A. Alsherif ◽  
Angie R. Eldamak
Keyword(s):  
Breast Cancer ◽  
Cancer Detection ◽  
Imaging System ◽  
Imaging Techniques ◽  
Microwave Imaging ◽  
Breast Cancer Detection ◽  
Ultra Wideband ◽  
Impedance Bandwidth ◽  
Antenna Element ◽  
Textile Sensor

Abstract This paper investigate different available breast cancer imaging methods, particularly microwave imaging techniques (MI). The building block of a radar-based microwave imaging system using a flexible antenna element that could be integrated in a clothing item. It could be accessible to women everywhere easily and at an affordable price which will help them with early breast cancer detection. Two different flexible monopole antennas on a cotton substrate are designed for radar-based microwave imaging. The ultra-wideband (UWB) fully textile sensor shaped as rectangular and circular monopole antenna for breast cancer detection (BCD) are designed. The antenna operates at impedance bandwidth \(\le\)-10dB in the operating band extend from 2.5 to 9 GHz with an overall footprint of 50 × 50 mm2. Simulated detection and bending capacity then proceeded to fabricate a breast phantom and a tumor sample with parameters that mimic these of the human breast’s healthy and malignant tissue. Measurements highly match with the simulation results as well as the performance of antenna before and after subjected to washing is measured and compared. Moreover, simulations of antenna in proximity to breast model with and without tumor are also conducted. Finally the specific absorption rate (SAR) is also calculated to insure that the developed textile sensor is safe to be deployed on-body. The proposed work demonstrates the potential to develop wearable microwave imaging system using fully textile antennas.

Microwave Imaging Techniques for Non-Destructive Testing of Materials

1992 ◽  
Vol 269 ◽  
Author(s):  
J.Ch. Bolomey ◽  
Ch. Pichot
Keyword(s):  
Image Quality ◽  
Spatial Resolution ◽  
Imaging Techniques ◽  
Microwave Imaging ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Improve Image Quality ◽  
Technological Advances ◽  
Processing Techniques ◽  
Non Destructive

ABSTRACTRecent technological advances for microwave multiport sensors lead us to look for efficient wavefront processing techniques in order to improve image quality, in terms of spatial resolution and contrast. This paper reviews some of these techniques which can be used for Non-Destructive Testing purposes. Mutual advantages and limitations are analysed.

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