Abstract
With the rapid development on micro electro mechanical system (MEMS) and wireless transmission technology, wireless sensor networks (WSN) are becoming an emerging technology with a number of potential applications. One such application is the monitoring of agricultural environmental parameter. Such an application requires an infinite-life power source that will harvest energy continuously from the ambient environment. This paper describe about the design, and development consideration of an energy harvester for an autonomous sensing system. The sensing components of WSN are connected with the energy harvester on the same structure to generate required energy from the ambient environment. As a case study, the power requirement by MIMOS Berhad [1] developed WSN components are measured from real time deployment. Based on the power requirement an autonomous system is designed (patent granted [2]) and proof of concept (POC) of the system is implemented. The POC shows from 1 cm2 area of the energy harvester a potential difference of 0.6 V and current of 0.25mA can be achieved. These results shows, by cascading several unit area of the energy harvester and integrating it with WSN components, it is possible to achieve autonomous WSN system, which is very essential for realistic deployment of WSN.
Published Version
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