Beschreibung:
<jats:p>Abstract. This article describes an Internet of things (IoT) sensing device
with a wireless interface which is powered by the energy-harvesting method of the
Wiegand effect. The Wiegand effect, in contrast to continuous sources like
photovoltaic or thermal harvesters, provides small amounts of energy
discontinuously in pulsed mode. To enable an energy-self-sufficient
operation of the sensing device with this pulsed energy source, the output
energy of the Wiegand generator is maximized. This energy is used to power up
the system and to acquire and process data like position, temperature or
other resistively measurable quantities as well as transmit these data via an
ultra-low-power ultra-wideband (UWB) data transmitter. A proof-of-concept
system was built to prove the feasibility of the approach. The energy
consumption of the system during start-up was analysed, traced back in
detail to the individual components, compared to the generated energy and
processed to identify further optimization options. Based on the
proof of concept, an application prototype was developed.
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