Evaluation of Signal Features used for Impact Localization on a Center Console with Piezoceramic Sensors

Abstract

Smart components are increasingly of interest inresearch and industry due to their wide range of applications. Anexample of this is a current project of the Federal ExcellenceCluster MERGE, which is concerned with the development of acenter console that serves as a control element in an automobileand is executing actions by touching it. In order to facilitate thisfunctionality, it is necessary to evaluate the electrical signalsgenerated by piezoceramic sensors regarding to the localizationof the impact. In this respect, various signal features areinvestigated for their suitability using a support vector machine.The results show that an impact localization can be realized bythe energetic consideration of the signals but has limitations inthe practical usability.

Hardware Software Co-Design for Impact Localization using Hybrid Laminates

“…The time differences between the individual sensors, determined by thresholding, have been used as input data, resulting in an intensity dependency [7]. This dependency is impractical for use as a center console, so Böhle et al considered signal features that guarantee intensity independence [10]. Overall, the results obtained are not satisfactory, since a maximum accuracy of about 70 % does not meet the requirements of a safety-critical system [10].…”

“…This dependency is impractical for use as a center console, so Böhle et al considered signal features that guarantee intensity independence [10]. Overall, the results obtained are not satisfactory, since a maximum accuracy of about 70 % does not meet the requirements of a safety-critical system [10].…”