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Radar-based living object protection for inductive charging of electric vehicles using two-dimensional signal processing

Part of: Contactless Charging for Electric Vehicles

Published online by Cambridge University Press:  09 October 2017

Tim Poguntke ,
Philipp Schumann  and
Karlheinz Ochs
Tim Poguntke*
Affiliation:
Robert Bosch GmbH, Corporate Sector Research and Advance Engineering, Robert-Bosch-Campus 1, Renningen 71272, Germany. Phone: +49 711 811 10884 Ruhr-Universität Bochum, Chair of Digital Communication Systems, Universitätsstraße 150, Bochum 44801, Germany
Philipp Schumann
Affiliation:
Robert Bosch GmbH, Corporate Sector Research and Advance Engineering, Robert-Bosch-Campus 1, Renningen 71272, Germany. Phone: +49 711 811 10884
Karlheinz Ochs
Affiliation:
Ruhr-Universität Bochum, Chair of Digital Communication Systems, Universitätsstraße 150, Bochum 44801, Germany
*
Corresponding author: T. Poguntke Email: tim.poguntke@de.bosch.com
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Abstract

As battery capacities become suitable for the mass market, there is an increasing demand on technologies to charge electric vehicles. Wireless charging is regarded as the most promising technique for automatic and convenient charging. Especially in publicly accessible parking spaces, foreign objects are able to enter the large air gap between the charging coils easily. Since the evoked magnetic field does not meet regulations, wireless charging systems are demanded to take further precautions related to the protection of endangered objects. Thus, additional sensors are required to protect primarily living objects by preventing them from being exposed to the magnetic field. In this paper, we propose a new approach for monitoring the air gap under the vehicle underbody using an automotive radar sensor on the vehicle side. The concept feasibility is evaluated with the help of a prototypical implementation. Further, two-dimensional signal processing techniques are applied to meet the requirements of inductive charging systems. Consequently, this paper provides measurement data for relevant use cases frequently discussed in the community of inductive charging.

Keywords

Digital signal processingRadar technology
Type
Special Issue on Contactless Charging for Electric Vehicles
Information
Wireless Power Transfer , Volume 4 , Special Issue 2: Contactless Charging for Electric Vehicles , September 2017 , pp. 88 - 97
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Copyright
Copyright © Cambridge University Press 2017 

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References

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