| Popis: |
Chapter 3 reviews the ambient energy sources amenable to powering autonomous sensors. We have classified them into five main groups: radiant, mechanical, thermal, magnetic, and biochemical. In general, we consider energy already present in the environment, although in some cases energy can be expressly distributed, in a process called remote powering. The associated energy transducers are also described and some of the most relevant literature is referenced. The choice of the ambient energy source strongly depends on the ambient energy density at the autonomous sensor’s location and on the load’s power needs, which together will determine the size of the transducer. Energy density can be estimated from typical values provided in the literature and complemented with specific measurements performed at the final placement of the autonomous sensor. |
