DESIGN, MODELING AND CHARACTERIZATION OF A PIEZOELECTRIC ENERGY HARVESTING DEVICE

The mechanical vibratory energy has been extracted based on the car engine’s frequency and converted into an electrical energy by making use of a bimorph piezoelectric harvesting device; this process is called energy harvesting. The output of that energy used to power-up small electronics devices such as electronic transmitters and sensors which utilize low voltage and current (1-5 Volt / 10 - 20 mA). A cantilever of Lead-Zirconate-Titanate (PbZrO3TiO2) with dimensions of (40 × 10 ×
0.5 mm) has been analyzed and it’s produced an output power in the range of (100μW - 0.4mW) at resonance frequency of (≤ 0.2 KHz) under peak acceleration of (≤ 10 m/s2). This cantilever’s targeted vibration is dynamic (damped) vibration; therefore it has been subjected into continuous vibratory force. The Static Vibration is run at the first stages to check the working force and stamina of the cantilever by applying a pulse of movement and observe the response of the transient wave of the cantilever. The project aims to design and model a bimorph piezoelectric (PZT) cantilever device uses the effects of piezoelectric property to extract the mechanical vibration that is generated based on the car engine compartment’s specifications and convert it to electrical energy. Successfully, a bimorph piezoelectric harvester cantilever was designed under the optimal conditions identified in this report to extract the car engine vibration produced by dynamic vibration shaker using the typical frequencies and acceleration of the car engine and produced output power nearly 0.39 mW when converts this extracted vibration to electrical energy