Download or read book Modeling and Optimisation of Stepped frequency Ground Penetrating Radar written by Lidia Donskoi and published by . This book was released on 1998 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stepped Frequency Ground Penetrating Radar written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A stepped frequency ground penetrating radar system is described comprising an RF signal generating section capable of producing stepped frequency signals in spaced and equal increments of time and frequency over a preselected bandwidth which serves as a common RF signal source for both a transmit portion and a receive portion of the system. In the transmit portion of the system the signal is processed into in-phase and quadrature signals which are then amplified and then transmitted toward a target. The reflected signals from the target are then received by a receive antenna and mixed with a reference signal from the common RF signal source in a mixer whose output is then fed through a low pass filter. The DC output, after amplification and demodulation, is digitized and converted into a frequency domain signal by a Fast Fourier Transform. A plot of the frequency domain signals from all of the stepped frequencies broadcast toward and received from the target yields information concerning the range (distance) and cross section (size) of the target.
Download or read book Wide Band Stepped Frequency Ground Penetrating Radar written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A wide band ground penetrating radar system (10) embodying a method wherein a series of radio frequency signals (60) is produced by a single radio frequency source (16) and provided to a transmit antenna (26) for transmission to a target (54) and reflection therefrom to a receive antenna (28). A phase modulator (18) modulates those portion of the radio frequency signals (62) to be transmitted and the reflected modulated signal (62) is combined in a mixer (34) with the original radio frequency signal (60) to produce a resultant signal (53) which is demodulated to produce a series of direct current voltage signals (66) the envelope of which forms a cosine wave shaped plot (68) which is processed by a Fast Fourier Transform unit 44 into frequency domain data (70) wherein the position of a preponderant frequency is indicative of distance to the target (54) and magnitude is indicative of the signature of the target (54).
Download or read book OFDM Coupled Compressive Sensing Algorithm for Stepped Frequency Ground Penetrating Radar written by Mohamed Metwally and published by . This book was released on 2014 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dating back to as far as 1940, the US road and bridge infrastructure system has garnered quite the status for strategically connecting together half a continent. As monumental as the infrastructure's status, is its rate of deterioration, with the average bridge age coming at a disconcerting 50 years. Aside from visual inspection, a battery of non-destructive tests were developed to conduct structural fault assessment and detect laminations, in order to preemptively take preventive measures. The mainstream commercially favored test is the impulse time domain ground penetrating radar (GPR). An extremely short, high voltage pulse is used to visualize cross-sections of the bridge decks. While effective and it does not disturb traffic flow, impulse radar suffers from major drawbacks. The drawbacks are namely, its limited dynamic range and high cost of system manufacturing. A less prominent yet highly effective system, stepped frequency continuous wave (SFCW) GPR, was developed to address the aforementioned drawbacks. Mostly developed for research centers and academia, SFCW boasts a high dynamic range and low cost of system manufacturing, while producing comparable if not identical results to the impulse counterpart. However, data procurement speed is an inherent problem in SFCW GPR, which seems to keep impulse radar in the lead for production and development. I am proposing a novel approach to elevate SFCW's data acquisition speed and its scanning efficiency altogether. This approach combines an encoding method called orthogonal frequency division multiplexing (OFDM) and an emerging paradigm called compressive sensing (CS). In OFDM, a digital data stream, the transmit signal, is encoded on multiple carrier frequencies. These frequencies are combined in such a way to achieve orthogonality between the carrier frequencies, while mitigating any interference between said frequencies. In CS, a signal can be potentially reconstructed from a few samples below the standardized Nyquist rate. A novel design of the SFCW GPR architecture coupled with the OFDM-CS algorithm is proposed and evaluated using ideal channels and realistically modelled bridge decks.
Download or read book Ground Penetrating Radar written by Mohammed Serhir and published by John Wiley & Sons. This book was released on 2024-05-21 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers an overview of modern advances in Ground Penetrating Radar (GPR) for the reader hoping to understand comprehensive electromagnetic culture, combining instrumental development of radar, signal processing, imaging, and calibration/correction of measured data. GPR has a multi-disciplinary character that can bring together a diverse and broad community. Of concern are the design and optimization of innovative radars, by virtue of the antennas and associated electronics, imaging algorithms, methodological diversity, calibration procedures, and the development of tools for the interpretation of data in mono-static or multi-static configurations within frequency or transient domains. This book provides illustrations in civil engineering for the diagnosis of transport infrastructures and buildings, archeological surveys for the appreciation of cultural heritage, detection of underground pipes and cavities, estimation of soil water content for agriculture, and mapping of root trees developing underground, and in planetology, the analysis of the internal structure of planets and other celestial bodies through electromagnetic waves.
Download or read book RF Hardware Design of a Stepped Frequency Continuous Wave Ground Penetrating Radar written by Marten Herbert Kabutz and published by . This book was released on 1995 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Design of Hardware and Signal Processing for a Stepped Frequency Continuous Wave Ground Penetrating Radar written by Alan Langman and published by . This book was released on 2002 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Design and Implementation of a 200 to 1600 MHz Stepped Frequency Ground Penetrating Radar Transceiver written by George Farquharson and published by . This book was released on 1999 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stepped Frequency Radar Sensors written by Cam Nguyen and published by Springer. This book was released on 2016-03-29 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the theory, analysis and design of microwave stepped-frequency radar sensors. Stepped-frequency radar sensors are attractive for various sensing applications that require fine resolution. The book consists of five chapters. The first chapter describes the fundamentals of radar sensors including applications followed by a review of ultra-wideband pulsed, frequency-modulated continuous-wave (FMCW), and stepped-frequency radar sensors. The second chapter discusses a general analysis of radar sensors including wave propagation in media and scattering on targets, as well as the radar equation. The third chapter addresses the analysis of stepped-frequency radar sensors including their principles and design parameters. Chapter 4 presents the development of two stepped-frequency radar sensors at microwave and millimeter-wave frequencies based on microwave integrated circuits (MICs), microwave monolithic integrated circuits (MMICs) and printed-circuit antennas, and discusses their signal processing. Chapter 5 provides the electrical characterization and test results of the developed microwave and millimeter-wave stepped-frequency radar sensors. Finally, a summary and conclusion is provided.
Download or read book Step Frequency Ground Penetrating Radar Characterization and Federal Evaluation Tests written by U.s. Department of Transportation and published by Createspace Independent Publishing Platform. This book was released on 2018-07-25 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: Step frequency ground penetrating radar characterization and federal evaluation tests /
Download or read book Step Frequency Ground Penetrating Radar Characterization and Federal Evaluation Tests written by Michael Leon Scott and published by . This book was released on 2010 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: A step frequency ground penetrating radar (SF GPR) system was characterized and evaluated to determine whether it can be operated safely in a proposed configuration that may include frequency notching in specific frequency bands. This emission testing was conducted with possible notching configurations turned on and then turned off to allow for both scenarios to be evaluated. Testing work focused on emissions characterization measurements suitable for computer analysis of potential interference with relevant systems. After initial testing was completed, needs for follow-up testing were defined. This follow-up testing was completed, and results are included in this report.
Download or read book Determination of the Best Ground Penetrating Radar Source Signal Type for the Accurate Location of Underground Utilities written by W. E. Thain and published by . This book was released on 1988 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: This investigation was to determine the best ground-penetrating radar (GPR) source signal applicable for locating underground utilities and other construction obstacles. Four types of GPR systems were tested: Two time-domain short-pulse radars, one swept frequency FM-CW system, and one stepped-FM system. The performance of the systems were compared by examining their time-domain or simulated time-domain responses. The detection problem was modeled analytically to evaluate the expected performance of the GPR systems. Tests were conducted in a scale-model tank with two soils of differing dielectric properties. Specially designed shielded triangular-sheet dipole antennas were used for comparison tests. It is concluded that a frequency-domain GPR based on a stepped-frequency design provides the highest performance capabilities. The general performance of a full-scale version of such a GPR was demonstrated in an outdoor test field containing buried plastic and metal pipes. (rh).
Download or read book Ground Penetrating Radar written by David J. Daniels and published by IET. This book was released on 2004-08-20 with total page 754 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the key elements of the subject of surface penetrating radar, and in general terms the inter-relationship between those topics in electromagnetism, soil science, geophysics and signal processing which form part of its design.
Download or read book Introduction to Ground Penetrating Radar written by Raffaele Persico and published by John Wiley & Sons. This book was released on 2014-06-09 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: A real-world guide to practical applications of ground penetrating radar (GPR) The nondestructive nature of ground penetrating radar makes it an important and popular method of subsurface imaging, but it is a highly specialized field, requiring a deep understanding of the underlying science for successful application. Introduction to Ground Penetrating Radar: Inverse Scattering and Data Processing provides experienced professionals with the background they need to ensure precise data collection and analysis. Written to build upon the information presented in more general introductory volumes, the book discusses the fundamental mathematical, physical, and engineering principles upon which GPR is built. Real-world examples and field data provide readers an accurate view of day-to-day GPR use. Topics include: 2D scattering for dielectric and magnetic targets 3D scattering equations and migration algorithms Host medium characterization and diffraction tomography Time and frequency steps in GPR data sampling The Born approximation and the singular value decomposition The six appendices contain the mathematical proofs of all examples discussed throughout the book. Introduction to Ground Penetrating Radar: Inverse Scattering and Data Processing is a comprehensive resource that will prove invaluable in the field.
Download or read book Ground Penetrating Radar written by Mohammed Serhir and published by John Wiley & Sons. This book was released on 2024-04-16 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers an overview of modern advances in Ground Penetrating Radar (GPR) for the reader hoping to understand comprehensive electromagnetic culture, combining instrumental development of radar, signal processing, imaging, and calibration/correction of measured data. GPR has a multi-disciplinary character that can bring together a diverse and broad community. Of concern are the design and optimization of innovative radars, by virtue of the antennas and associated electronics, imaging algorithms, methodological diversity, calibration procedures, and the development of tools for the interpretation of data in mono-static or multi-static configurations within frequency or transient domains. This book provides illustrations in civil engineering for the diagnosis of transport infrastructures and buildings, archeological surveys for the appreciation of cultural heritage, detection of underground pipes and cavities, estimation of soil water content for agriculture, and mapping of root trees developing underground, and in planetology, the analysis of the internal structure of planets and other celestial bodies through electromagnetic waves.
Download or read book Theory Design and Implementation of an IF Cancellation Module for Use in a Stepped Frequency Continuous Wave Ground Penetrating Radar written by Christian Frederick Zietsman and published by . This book was released on 2004 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ground Penetrating Radar written by Erica Carrick Utsi and published by Butterworth-Heinemann. This book was released on 2017-04-18 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ground Penetrating Radar: Theory and Practice is a practical guide to using this powerful underground surveying technique. The author uses her wide experience to explain the critical factors in using GPR and how parameters, such as wavelength, attenuation and loss need to be properly considered to obtain good survey results. The first chapter introduces the underlying physics and explains the formation of signal patterning. The next two chapters explain the significance of wavelengths for target detection, probing depths and resolution, and demonstrating the variety of signal presentation. Chapter four discusses why survey results are affected by water and air in the soil, and how this may affect depth readings. Additional chapters discuss a variety of methods for velocity calibration and suggests where they may be useful, challenging soil conditions and potential problem environments, data processing and a suite of useful techniques, amongst other important topics. The book gives a clear and formative guidance on understanding the critical factors in using GPR, as well as a checklist of surveying considerations. Covers the critical, practical factors in using a ground penetrating radar, including troubleshooting appropriate equipment selection Explains why wavelengths matter, providing practice calculations Offers insight into how to spot ringing (echo effects) and air signals, and how to distinguish these from subsurface data Enables the reader to understand the importance of calibration of transmission velocity and a range of methodsa
