Piezo Electric Sensors

The harvesting of ambient energy to power small electronic components has received tremendous attention over the last decade. The research goal in this field is to enable self-powered electronic components for use particularly in wireless sensing and measurement. Thermal energy due to temperature gradients, solar energy and ambient vibrations constitute some of the major sources of energy that can be harvested. The process of extracting energy from the surrounding environment is termed as energy harvesting. There are various forms of energy that can be scavenged, like

Energy crisis is a major concern in today's world. As the demand of energy is increasing day by day, so the ultimate solution to deal with these sorts of problems is just to implement the renewable sources of energy. The objective of footstep power generation project is to abstract renewable energy. If this project is installed in highly dense areas such as railway stations, clubs, parks etc. then maximum amount of energy can be abstracted from it. By simply walking on footpath, electricity is generated. Also we are adding piezoelectric crystal on the platform of the footstep to increase power output. This project consists rack and pinion assembly as a driving mechanism. In this project, force energy is converted into electrical energy. The control mechanism consists of the rack & pinion, D.C generator, battery and inverter control. We have discussed the various applications and further extension also. So this project is implemented to all foot step, the power generation is very high.

Infrastructure construction is the second largest economic activity in India after agriculture and it is growing rapidly. Structural Health Monitoring (SHM) aims to provide new solutions for easy and swift inspection of engineered structures. Electromechanical impedance (EMI) technique is a relatively new useful and convenient technique in the area of SHM. Though this technique shows promising results in the area of SHM, the main disadvantage of this technique is the brittleness of the piezo-electric (PZT) material. To overcome this problem, a new variant has recently emerged wherein a metal wire is coupled with the PZT patch and then attached with the host structure. This paper primarily focuses on evaluating the metal wire based EMI technique for damage assessment of 2D structure. Test results show that the technique can effectively identify and locate damage on a 2D structure.