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Eliminating the Ground Reference for Wireless Electric Field Sensing

von Wilmsdorff, Julian and Kirchbuchner, Florian and Braun, Andreas and Kuijper, Arjan (2018):
Eliminating the Ground Reference for Wireless Electric Field Sensing.
In: Ambient Intelligence, Cham, Springer, In: European Conference on Ambient Intelligence (AmI), Larnaca, Cyprus, 2018, 11249, ISSN 0302-9743,
ISBN 978-3-030-03061-2,
DOI: 10.1007/978-3-030-03062-9_7,
[Online-Edition: https://doi.org/10.1007/978-3-030-03062-9_7],
[Conference or Workshop Item]

Abstract

Capacitive systems are getting more and more attention these days. But many systems today like smart-phone screens, laptops, and non-mechanical buttons use capacitive techniques to measure events within several centimeters of distance. The reason that battery-powered devices don’t have high measurement ranges lies in the principle of capacitive measurement itself - the electrical ground is an inherent part of the measurement. In this paper, we present a method for passive and wireless capacitive systems to eliminate the reference to ground. This bears a couple of advantages for mobile, battery-powered capacitive sensor designs in the field of ambient intelligence. We compare the detection range of normal passive capacitive systems with our new approach. The results show that our improvements result in a higher detection range and higher power efficiency.

Item Type: Conference or Workshop Item
Erschienen: 2018
Creators: von Wilmsdorff, Julian and Kirchbuchner, Florian and Braun, Andreas and Kuijper, Arjan
Title: Eliminating the Ground Reference for Wireless Electric Field Sensing
Language: English
Abstract:

Capacitive systems are getting more and more attention these days. But many systems today like smart-phone screens, laptops, and non-mechanical buttons use capacitive techniques to measure events within several centimeters of distance. The reason that battery-powered devices don’t have high measurement ranges lies in the principle of capacitive measurement itself - the electrical ground is an inherent part of the measurement. In this paper, we present a method for passive and wireless capacitive systems to eliminate the reference to ground. This bears a couple of advantages for mobile, battery-powered capacitive sensor designs in the field of ambient intelligence. We compare the detection range of normal passive capacitive systems with our new approach. The results show that our improvements result in a higher detection range and higher power efficiency.

Title of Book: Ambient Intelligence
Volume: 11249
Place of Publication: Cham
Publisher: Springer
ISBN: 978-3-030-03061-2
Uncontrolled Keywords: Capacitive sensors, Electric field sensing, Mobile sensors, Electrical engineering, Sensor technologies
Divisions: 20 Department of Computer Science
20 Department of Computer Science > Interactive Graphics Systems
20 Department of Computer Science > Mathematical and Applied Visual Computing
Event Title: European Conference on Ambient Intelligence (AmI)
Event Location: Larnaca, Cyprus
Event Dates: 2018
Date Deposited: 26 Jun 2019 11:45
DOI: 10.1007/978-3-030-03062-9_7
Official URL: https://doi.org/10.1007/978-3-030-03062-9_7
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