If the radius of curvature of the road (r) is not known it can be found with the help of this equation. µ=co-efficient of friction between the wheels and the road surface M=mass of the vehicle v=velocity while taking the turn r=radius of curvature of the road In this way power generation can be maximized as electricity can be generated when the vehicle is turning, moving forward. The piezoelectric accelerometers can be located at different points on the chassis as shown in figure. This force can be utilised by the piezoelectric accelerometers to generate electricity which can be used for charging the battery in a hybrid system. The force acting on the chassis can be calculated with the help of the equation: Therefore, since (d) and (m) are constant, the generated electric charge (Q) is linearly proportional to the acceleration () From Newton's Second Law, the relationship between the acceleration () applied to the accelerometers sensor, and the inertial force (F) applied to the piezoelectric element can be expressed. The piezoelectric element is sandwiched between a constant mass (m) and a base. The basic structure of a piezoelectric accelerometer is as follows. (Q) is constant depending on the composition. The piezoelectric element is a functional material that generates an electric charge when applied to an inertial force (F). No power supply required (except for models with internal pre-amplifiers. Wide measurement range: from very faint vibrations to high accelerations Wide band: from low- to high-frequency measurement acceleration, vibration, and mechanical shock) A piezoelectric accelerometer utilizes the piezoelectric effect of certain materials to measure dynamic changes in mechanical variables. Piezoelectric accelerometers convert one form of energy into another and provide an electrical signal in response to a quantity, property, or condition that is being measured. Introduction to Piezoelectric Accelerometers The overall efficiency of this hybrid system can also be increased when it is used in conjunction with regenerative braking.Ĭhassis, vibration, vehicle, electrical energy. The electrical energy is used to drive an AC motor which is used in the hybrid system. These forces can vary in magnitude and accordingly electricity is generated which is then stored during the course of operation or usage of the automobile. As the vehicle takes a turn in any given direction or even when it accelerates and decelerates the piezoelectric crystals come into play due to the acceleration forces acting on them. The piezoelectric crystals can be mounted on the chassis of the vehicle. This paper explains how piezoelectric accelerometers can be used to generate electricity that can be used to run a secondary electric motor in a hybrid automobile. Mayur Ingale Department of mechanical engineering, Rajiv Gandhi Institute of Technology, ![]() Sumit Jain Department of mechanical engineering, Rajiv Gandhi Institute of Technology, Sean DSilva Department of mechanical engineering, Rajiv Gandhi Institute of Technology, Use of Piezoelectric Accelerometers as a Hybrid System in Automobiles
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