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Influences Of Road Surface Characteristics On Scattering Mechanisms In Automotive Radar

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Influences Of Road Surface Characteristics On Scattering Mechanisms In Automotive Radar

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Author : Vera Maria Kurz
language : en
Publisher: Cuvillier Verlag
Release Date :

Influences Of Road Surface Characteristics On Scattering Mechanisms In Automotive Radar written by Vera Maria Kurz and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.

In dieser Arbeit wird der Einfluss von Straßenoberflächen und -materialien auf die Radar Streuung im automotiven Frequenzband von 77GHz untersucht. Sie umfasst alle üblicherweise auf deutschen Autobahnen verbauten Asphalt und Betontypen und unterscheidet zwischen spiegelnder und diffuser Reflektion, deren Übergang durch das Rayleigh Kriterium und dem resultierenden kritischen Winkel definiert wird. Hierfür werden verschiedene Messmethoden angewendet. Diese sind die Sandfleckmethode, die Focus beam Methode, ein Messaubau mit Radar mit synthetischer Apertur (SAR) und Freiraum FMCW Radar Messungen, die einen Radarspiegel nutzen. Für eine mathematische Beschreibung werden einerseits Wahrscheinlichkeitsdichtefunktionen (PDF) der Reflexion mit Normalverteilung und Rayleigh Verteilung ermittelt. Um andererseits die Freiraummessungen zu verarbeiten, werden Radargleichung und Fresnels Gleichungen genutzt, wodurch Werte für die relative Permittivität und die dazugehörige Rauigkeit berechnet werden, welche in der frei zugängigen Datenbank OpenMATERIAL zu Verfügung stehen. Zur Validierung dienen Referenzobjekte und Messungen mit unterschiedlichen Polarisationen der Radarsensoren. In this work, the influence of different road surfaces and materials, or more precisely of different asphalt and concrete surfaces, is analyzed for the automotive 77GHz band. It comprises all roads commonly found on German highways and distinguishes in specular reflection and diffuse scattering behavior. The changeover from one to the other behavior is determined by the Rayleigh criterion resulting in corresponding critical angles. For these measurements the area of sands method, the focus beam method, a synthetic aperture radar (SAR) setup as well as a openspace FMCW radar setup with a corner reflector are applied. The characterization includes probability density functions (PDF) of the reflectance of these dielectric surfaces using normal distribution as well as Rayleigh distribution. For the evaluation of the openspace measurements, the radar equation and Fresnel’s equations are used, resulting in relative permittivity and roughness values, which are provided as well in an open source material library named OpenMATERIAL. For validation purposes reference samples and measurements with different polarization of the radar sensor are used.

Influences Of Road Surface Characteristics On Scattering Mechanisms In Automotive Radar

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Author : Vera Maria Kurz
language : en
Publisher: Cuvillier
Release Date : 2024

Influences Of Road Surface Characteristics On Scattering Mechanisms In Automotive Radar written by Vera Maria Kurz and has been published by Cuvillier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024 with Technology & Engineering categories.

In this work, the influence of different road surfaces and materials, or more precisely of different asphalt and concrete surfaces, is analyzed for the automotive 77GHz band. It comprises all roads commonly found on German highways and distinguishes in specular reflection and diffuse scattering behavior. The changeover from one to the other behavior is determined by the Rayleigh criterion resulting in corresponding critical angles. For these measurements the area of sands method, the focus beam method, a synthetic aperture radar (SAR) setup as well as a openspace FMCW radar setup with a corner reflector are applied. The characterization includes probability density functions (PDF) of the reflectance of these dielectric surfaces using normal distribution as well as Rayleigh distribution. For the evaluation of the openspace measurements, the radar equation and Fresnel's equations are used, resulting in relative permittivity and roughness values, which are provided as well in an open source material library named OpenMATERIAL. For validation purposes reference samples and measurements with different polarization of the radar sensor are used.

Polarimetric Radar For Automotive Applications

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Author : Visentin, Tristan
language : en
Publisher: KIT Scientific Publishing
Release Date : 2019-04-10

Polarimetric Radar For Automotive Applications written by Visentin, Tristan and has been published by KIT Scientific Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-04-10 with Technology (General) categories.

Current automotive radar sensors prove to be a weather robust and low-cost solution, but are suffering from low resolution and are not capable of classifying detected targets. However, for future applications like autonomous driving, such features are becoming ever increasingly important. On the basis of successful state-of-the-art applications, this work presents the first in-depth analysis and ground-breaking, novel results of polarimetric millimeter wave radars for automotive applications.

Scientific And Technical Aerospace Reports

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Author :
language : en
Publisher:
Release Date : 1995

Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Aeronautics categories.

Automotive Engineering

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Author :
language : en
Publisher:
Release Date : 1978

Automotive Engineering written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Automobiles categories.

Energy Research Abstracts

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Author :
language : en
Publisher:
Release Date : 1979

Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Power resources categories.

Encyclopedia Of Optical And Photonic Engineering Print Five Volume Set

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Author : Craig Hoffman
language : en
Publisher: CRC Press
Release Date : 2015-09-22

Encyclopedia Of Optical And Photonic Engineering Print Five Volume Set written by Craig Hoffman and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-09-22 with Science categories.

The first edition of the Encyclopedia of Optical and Photonic Engineering provided a valuable reference concerning devices or systems that generate, transmit, measure, or detect light, and to a lesser degree, the basic interaction of light and matter. This Second Edition not only reflects the changes in optical and photonic engineering that have occurred since the first edition was published, but also: Boasts a wealth of new material, expanding the encyclopedia’s length by 25 percent Contains extensive updates, with significant revisions made throughout the text Features contributions from engineers and scientists leading the fields of optics and photonics today With the addition of a second editor, the Encyclopedia of Optical and Photonic Engineering, Second Edition offers a balanced and up-to-date look at the fundamentals of a diverse portfolio of technologies and discoveries in areas ranging from x-ray optics to photon entanglement and beyond. This edition’s release corresponds nicely with the United Nations General Assembly’s declaration of 2015 as the International Year of Light, working in tandem to raise awareness about light’s important role in the modern world. Also Available Online This Taylor & Francis encyclopedia is also available through online subscription, offering a variety of extra benefits for researchers, students, and librarians, including: Citation tracking and alerts Active reference linking Saved searches and marked lists HTML and PDF format options Contact Taylor and Francis for more information or to inquire about subscription options and print/online combination packages. US: (Tel) 1.888.318.2367; (E-mail) [email protected] International: (Tel) +44 (0) 20 7017 6062; (E-mail) [email protected]