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Wednesday 8 August 2012

SPEECH RECOGNITION ENABLED SMART HOME AUTOMATION FOR THE BLIND AND PHYSICALLY

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SPEECH RECOGNITION ENABLED SMART HOME AUTOMATION FOR THE BLIND AND PHYSICALLY 


Abstract:
In the last few years, there has been an increasing demand for low-power and portable-energy sources due to the development and mass consumption of portable electronic devices. Furthermore, the portable-energy sources must be associated with environmental issues and imposed regulations. These demands support research in the areas of portable-energy generation methods. In this scope, piezoelectric materials become a strong candidate for energy generation and storage in future applications. This paper describes the use of piezoelectric polymers in order to harvest energy from people walking and the fabrication of a shoe capable of generating and accumulating the energy. In this scope, electroactive β-polyvinylidene fluoride used as energy harvesting element was introduced into a bicolor sole prepared by injection, together with the electronics needed to increase energy transfer and storage efficiency. An electrostatic generator was also included in order to increase energy harvesting.

I. Introduction

As low-power and wearable electronic devices are more and more present in our everyday life, there is a growing need for the delivery of power to different points of the human body. Table I shows the approximate energy consumption for 1 h of operation of some portable devices that can be considered as possible applications of the energy generated by our system.


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Conclusion
From the several methods available to integrate energy generating elements harvesting human energy, piezoelectric materials associated with electrostatic generators seem to be one of the most promising elements. In particular, electroactive polymers are particularly used due to their low cost, flexibility, and easy integration into shoes. In this paper, electroactive polymers based on β-PVDF have been used in order to fabricate an energy-harvesting system fully integrated into the sole of a shoe. Through the simple configuration and electronics, energy harvesting is possible.


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