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The commercially available sensor nodes are battery-driven devices. A number of nodes together constitute a network. As days proceed, the batteries used in the nodes lose their charge and subsequently get isolated from the network. Many energy harvesting schemes have been proposed to alleviate this problem. In this paper, a solar energy based energy harvesting scheme is proposed. This scheme works...
By using the piezoelectric direct effect, piezoelectric energy harvesters hold the promise of providing an alternative power generating device. Also, ambient vibration is the focus to provide the amount of available mechanical energy resource that can be converted into electricity by piezoelectric ceramics. Design and analysis of the piezoelectric unimorph ceramic and electric converter as well as...
The performance of small wind energy conversion systems (SWECS) in remote and low wind speed regions can be improved by augmenting the battery only energy smoothing with a front end ultracapacitor and small DC-DC converter. The benefits include energy harvesting close to zero wind speed where a conventional DC SWECS would not generate. The variable voltage front end and converter are found to deliver...
The benefits of enhanced condition monitoring in the asset management of the electricity transmission infrastructure are increasingly being exploited by the grid operators. Adding more sensors helps to track the plant health more accurately. However, the installation or operating costs of any additional sensors could outweigh the benefits they bring due to the requirement for new cabling or battery...
In this paper we present a novel algorithm that significantly improves the efficiency of wireless sensor networks, while providing a low and stable energy consumption profile irrespective of the number of nodes. We also present a modified- mica Mote (m2-Mote) that uses a rectenna to produce DC-power from scavenged RF-energy for charging the node batteries. From our analysis and simulation of a 500...
Utilization of low power indoor devices such as remote sensors, supervisory and alarm systems, distributed controls, and data transfer system are on steady rise. Due to remote and distributed nature of these systems, it is attractive to avoid using electrical wiring to supply power to them. Primary batteries have been used for this application for many years but they require regular maintenance at...
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