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Multi sensor node for long-term wireless measurement of density, pH value and temperature in silage for bio gas

: Arnold, P.; Tschoban, C.; Heuer, K.; Rochlitzer, R.; Thuenen, T.; Lang, K.-D.

Reindl, L.M. ; Informationstechnische Gesellschaft -ITG-:
Sensoren und Messsysteme : Beiträge der 19. ITG/GMA-Fachtagung 26.-27. Juni 2018 in Nürnberg, CD-ROM
Berlin: VDE-Verlag, 2018 (ITG-Fachbericht 281)
ISBN: 978-3-8007-4683-5
ISBN: 3-8007-4683-2
ISBN: 978-3-8007-4866-2
Fachtagung Sensoren und Messsysteme <19, 2018, Nürnberg>
Fraunhofer IZM ()

A sensor node was designed, manufactured, tested and implemented to measure the density, the pH value and the temperature inside a stack of silage to increase the silage process efficiency for use in bio gas sites. The sensor node which comprises beside the multisensory system a wireless data communication unit, a battery, and an energy management system is described in this paper as well as the adjustment with a small model silo. A new sensor principle was developed for density measurements in inhomogeneous materials such as silage stacks.