Optimization And Research On Piezoelectric Power-Generating For Self-Power-Generating TPMS

In this paper, the electric energy gained by the conversion of mechanical energy of vibration is used as power of the monitor unit to replace the traditional battery. As the limited life of the traditional battery, it has to be replaced regularly. It is found that piezoelectric materials have good piezoelectric effects which can efficiently realize the conversion between mechanical energy and electric energy. In addition, piezoelectric materials also have other advantages which draw a lot more attention : simple structure, easy to implement, free of electromagnetic interference, once for all, less pollution. In recent decades, many experts at home and abroad on the piezoelectric material start the study on the performance of power-generating of piezoelectric material and achieved great progress. Through continuous study on theory and test, piezoelectric power generation has been successfully used in a number of micro-electronic devices. All these successful applications prove that piezoelectric power-generating has good prospects. Based on this, piezoelectric power-generating as monitoring unit for TPMS is studied in this paper.This article contains five points respectively:1. Introduction: theoretical research and successful cases of electricity generation by piezoelectric application; an analysis of the need for the installation of TPMS and its broad market prospects.2. Piezoelectric ceramic and B-style piezoelectric ceramic piezoelectric actuator: First of all, to discuss the performance of piezoelectric material parameters and the piezoelectric equations, the performance of piezoelectric material parameters of piezoelectric material to measure the performance of power generation, the choice of piezoelectric material standards; piezoelectric equation is a mathematical model of piezoelectric power generation is based on theoretical studies of the key properties of piezoelectric power generation. Followed by analysis of the advantages of B-style piezoelectric ceramic actuator to determine the best way to support and connection.3. Optimization of piezoelectric parameters: an analysis of piezoelectric vibrator response characteristics of a cantilever beam structure, a cantilever beam structure of the roots of the largest contingency; piezoelectric vibrator to the natural frequency of cantilever beam theory, in order to adjust the natural frequency of piezoelectric vibrator provides a theoretical basis; given static conditions, the single-chip and dual-chip charge, voltage, and the formula for calculating the energy, the quality of its free end if the block as a static load, the greater the mass, the effect of piezoelectric vibrator generating more. The establishment of a cantilever piezoelectric vibrator power of theoretical models to guide the piezoelectric vibrator to optimize the design parameters.4. The test to increase the capacity of electricity-generating: changes in the clamping piezoelectric vibrator way with ceramics and substrate clamping piezoelectric vibrator can enhance the generation capacity; 2. Piezoelectric oscillator by adjusting the size of parameters, such as increased free end the weight of mass, increasing the length of piezoelectric vibrator, piezoelectric vibrator to reduce the thickness of the piezoelectric vibrator can enhance the power generation capacity; selection of substrate materials, a smaller Young's modulus of the piezoelectric vibrator piezoelectric vibrator can enhance the power generation capacity; compare single-chip and dual-chip piezoelectric vibrator of generating capacity, the same substrate thickness, Young's modulus ratio less than 3.3 of the piezoelectric bimorph oscillator power-generating capacity than single-chip piezoelectric vibrator.5. Optimization of TPMS device: a brief introduction to the TPMS system and the principle of the process; analysis of the dynamics of the tire, piezoelectric vibration characteristics of the oscillator, power generation devices external storage circuit, and optimize the design of the piezoelectric power generation device; generating device for generating the indoor experiments, to predict the piezoelectric power generation device in the car when the power generation characteristics; piezoelectric power generation device for picking up the experiment to prove that power the device detection module for power supply TPMS for passive TPMS provided a choice.