25-08-2017, 09:32 PM
Surveillance System Using Piezoelectric Cables and Fibers
Surveillance System.docx (Size: 61.92 KB / Downloads: 28)
ABSTRACT
The appliance or rather device that we are manufacturing is going to have a large number of sensors and microelectronic devices located throughout the house, banks, malls, hospitals and at different security levels where ever required. These devices will need a clean, reliable source of energy that won’t need constant maintenance.
The goal of this project is to utilize piezoelectric energy sources to provide power to certain applications in the house. Initially the plan was to create an energy scavenging floor that used piezoelectric transducers to harvest wasted Energy in the foot strike of a human being. In consideration of the high cost and minimal power output of these piezo-sources, it seems more feasible to create small, localized energy sources rather than one large unified system.
This idea has lead to several potential applications. The first is to combine a piezoelectric power source with sensors such that there would be no need to ever change the batteries in these sensors. The next application is to use piezoelectric cable throughout the floors of the house as a means of tracking. Another application of the product is to use piezoelecric cables for the security or rather in Surveillance. The theoretical analysis indicates that typical humanmotion-generated displacements available for inertial microgenerators (approx. 5 mm motion at 1 Hz) can provide energy density of up to 4 μW/cm3 and up to 800 μW/cm3 can be extracted from high-pitched machine-induced stimuli (approx. 2 nm motion at 2.5 kHz) [5]. As typical human applies over 100 % of his own weight across the shoes at every heel strike therefore, cushioned shoe soles can be significantly compressed even during normal walk. Assuming an average person weighting 75 kg, 5 mm sole compression, regular walking speed of 2 steps/s this indicates that roughly about7 W of power could be available just from heel strikes.