Road Surface Condition Detection with Planar Capacitive Sensors

Konferenz: Sensoren und Messsysteme - 19. ITG/GMA-Fachtagung
26.06.2018 - 27.06.2018 in Nürnberg, Deutschland

Tagungsband: ITG-Fb. 281: Sensoren und Messsysteme

Seiten: 4Sprache: EnglischTyp: PDF

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Doering, Jakob; Happel, Jakob; Tharmakularajah, Lakshan; Krieger, Karl-Ludwig (Institute of Electrodynamics and Microelectronics (, University of Bremen, Germany)

This paper presents a new approach to detect the road surface condition by planar capacitive sensors, placed on the wheel arch liner of a motor vehicle. For this purpose, various design parameters of interdigital electrodes are studied by means of the finite element method (FEM). Based on this, a suitable design is proposed for the detection of whirled up water, which is manufactured on a flexible printed circuit board (PCB) and investigated in an experimental study. Therefore, a test bench is built, which includes a motor vehicle’s front wheel arch liner and can simulate realistic road surface scenarios. Experimental results show the possibility to distinguish between different scenarios. Furthermore, they prove that a static wetting of the wheel arch liner can be detected.