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Energy autarkic radio sensor for measuring wind velocity

  • In this article an energy harvesting system for measuring the wind speed starting from 2 m/s (about 2 Bft) is presented, which uses the same source for measuring and supplying power (energy autarkic). The use of the same source for measurement and power supply increases the number of potential applications since needed power is present with the measuring signal. For the case of measuring the wind velocity, one might consider applications in tunnels, tubes, pipelines, air conditioning or for controlling clogging of filters. Bluetooth Low Energy (BLE) is chosen as radio technology, since it provides the possibility to realize a unidirectional communication; requiring only a single telegram (advertising telegram) for sending the measured value. A more complex establishment of communication required by WLAN or 6LoWPAN could therefore be avoided to significantly reduce the overall energy consumption. Since the advertisement telegram does not make any provision for security or against hacking in general, a security concept is presented which includes encryption and resilience against replay attacks in a unidirectional communication system. To facilitate the presented concepts beyond wind sensors, the system is divided into three major modules namely the generator-sensor module, the radio module and the energy management module. Whereas the first two might be changed in different applications the energy management module could be reused in many different applications. It supplies and stores the needed energy and switches power on and off in a deterministic way to ensure the radio module can operate correctly.

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Author of HS ReutlingenFelger, Michael; Rubow, Sascha Patrick; Schwager, Jürgen; Zenner, Thorsten
Erschienen in:Proceedings of the Wireless Congress 2016: systems and applications : 9. - 10. November 2016, ICM Munich, Germany
Publisher:Weka Fachmedien GmbH
Place of publication:Haar
Document Type:Conference proceeding
Publication year:2016
Page Number:5
First Page:682
Last Page:686
DDC classes:620 Ingenieurwissenschaften und Maschinenbau
Open access?:Nein