New opportunities for electromobility in INTERNATIONAL SURFACE TECHNOLOGY (IST), Vol. 15, N° 3 (2022)

[article]  inINTERNATIONAL SURFACE TECHNOLOGY (IST) > Vol. 15, N° 3 (2022) . - p. 14-15 Titre : New opportunities for electromobility Type de document : texte imprimé Année de publication : 2022 Article en page(s) : p. 14-15 Langues : Anglais (eng) Catégories : Automobiles -- Pièces Automobiles -- Revêtements Capteurs radar Matières plastiques -- Métallisation Véhicules électriques Index. décimale : 667.9 Revêtements et enduits Résumé : A sustainable coating process for plastic metallization is to enable new functions and designs. It shows its potential in an all-electric compact SUV. Here it is used in the form of radar-transparent coatings for driver assistance systems. Note de contenu : Environmentally friendly - cost-effective - forward-looking - Unlocking potential in automotive engineering - Radar-transparent coatings for driver assistance systems - Coated mold for the kidney Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38763 [article]

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Perfect vision for autonomous vehicle / Andreas von Lösecke in KUNSTSTOFFE INTERNATIONAL, Vol. 112, N° 2 (2021)  

[article]  inKUNSTSTOFFE INTERNATIONAL > Vol. 112, N° 2 (2021) . - p. 18-21 Titre : Perfect vision for autonomous vehicle : Straightforward analysis and characterization of plastic materials for radar systems Type de document : texte imprimé Auteurs : Andreas von Lösecke, Auteur ; Yannic Kessler, Auteur Année de publication : 2021 Article en page(s) : p. 18-21 Langues : Anglais (eng) Catégories : Capteurs (technologie) Capteurs radar Caractérisation Essais (technologie) Matières plastiques dans les automobiles Polypropylène Véhicules autonomes Index. décimale : 668.4 Plastiques, vinyles Résumé : Autonomous and semi-autonomous vehicles rely on a complex hardware and software architecture that uses data from many different types of sensors. In order to generate reliable data, the sensors require an undisturbed view of the surroundings. For example, plastic parts used in radar systems must not disturb the functioning of the sensors. Comprehensive tests are required to investigate the suitability of such parts for radar applications. Specialized measuring systems and test setups can greatly simplify the testing process. Note de contenu : - Characterizing materials with a vector network analyzer - Measuring system with reduced complexity - Differences between tests in production and development - Identical quality despite lower resolution - Material characterization with an over-the-air setup - Fig. 1 : Reflection, absorption and transmission on a radome: since the target reflects the signal, a maximum allowable two-way loss is always defined for radomes - Fig. 2 : The wavefront is distorted by inhomogeneities in the radome and provides a distorted image of the surroundings to the radar sensor - Fig. 3 : Spatially resolved reflection image for a design emblem (left) with transmission curve vs. frequency (right): through analysis, it is possible to determine whether the radar sensor provides a meaningful picture of the surroundings - Fig. 4 : Visualization of the phase response for the same radome from Figure 1 analyzed with an R&S QAR system : phase angle distortions are clearly visible - Fig. 5 : Measurement of transmission loss vs. frequency (left) with reflection values (right), in each case for both sides of the radome: the differences in the reflection curve can be explained on the basis of the different measurement procedures, the inhomogeneity of the IUT and the different measurement surfaces that were selected - Fig. 6 : Frequency response for the reflection measurement on a sheet of Schulablend M/MK 6501 LE: the determined permittivity value is practically equivalent to the result obtained through costly materials testing En ligne : https://drive.google.com/file/d/1ayaphEFE-p5Z9xjLoSmooaoNvHJl3plC/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35491 [article]

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Reconciling design challenges and high-tech / Florian Pfeiffer in EUROPEAN COATINGS JOURNAL (ECJ), (04/2024)  

[article]  inEUROPEAN COATINGS JOURNAL (ECJ) > (04/2024) . - p. 20-25 Titre : Reconciling design challenges and high-tech : New pigment technologies for silver (and radar-transparent) automotive coatings Type de document : texte imprimé Auteurs : Florian Pfeiffer, Auteur ; Christoph Landmann, Auteur ; Clemens Günther, Auteur Année de publication : 2024 Article en page(s) : p. 20-25 Langues : Anglais (eng) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture Capteurs radar Permittivité La permittivité, plus précisément permittivité diélectrique, est une propriété physique qui décrit la réponse d'un milieu donné à un champ électrique appliqué. C'est une propriété macroscopique, essentielle de l'électrostatique, ainsi que de l‘électrodynamique des milieux continus. Elle intervient dans de nombreux domaines, notamment dans l’étude de la propagation des ondes électromagnétiques, et en particulier la lumière visible et les ondes utilisées en radiodiffusion. On la retrouve donc en optique, via l'indice de réfraction. Les lois gérant la réfraction et la réflexion de la lumière y font appel. Pigments nacrés Revêtement métallique Index. décimale : 667.9 Revêtements et enduits Résumé : Automotive coating formulators have the tricky challenge of developing highly sought-after metallic paints that also allow integrated sensor technology to function. A new technology should enable greater creativity with pearlescent pigments and provide formulators with a radar-transparent coating that delivers on performance even after vehicle repairs. Note de contenu : - Sensor technology : the fundamentals - Vehicle bumper permittivity as part of coating calculations - OEM coating considerations - Suitable pigment technologies for radar penetration - An experimental coating for OEM application - Retained performance after repairs - Design freedom with advanced technology - Fig. 1 : The positioning of radar devices in modern cars - Fig. 2 : Illustration of the measuring principle behind the radome measurement system, which is used to determine material permittivity - Fig. 3 : Simulated t wo-way transmission and reflection of an EM wave on uncoated PP/E TD30 as a function of layer thickness at 76.5 GHz and vertical incidence - Fig. 4 : Simulated t wo-way transmission and reflection of an EM wave on coated PP/E TD30 as a function of substrate layer thickness at 76.5 GHz and vertical incidence - Fig. 5 : Practical application of the novel pigment in an automotive formulation - Fig. 6 : Colour characterisation - Fig. 7 : A coated film on a random measurement system - Fig. 8 : Simulated two-way transmission and reflection of an EM wave on post-coated PP/E TD30 as a function of substrate layer thickness at 76.5 GHz ; vertical incidence En ligne : https://drive.google.com/file/d/1Aa4GCzQr5xhU2AnxdlewDjjYIIOBWASs/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40842 [article]

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