The Analysis And The Research Of The Piezoelectricity Rain-Removing System Of Rearview Mirror

To meet the demand of the project of the piezoelectricity rain-removing system of rearview mirror, this paper designs the scheme of rearview mirror's removing rain on the basis of piezoelectric driving technology, and develops the rearview mirror's automotive rain-removing system. The piezoelectricity chips are used as a source of vibration to cause the coupled torsional-axial vibration of rain-removing system. This make it possible for the system to remove rain. Combining theory with practice, this thesis researches and develops the rain-removing system in the method of theoretical analysis, calculation and experimental test. Relative factors which have influence on working properties of the rain-removing system have been identified by experiment research. Excepted results have been achieved and rain-moving effect is obvious.To improve the rain-removing results, experimental researches of driving elements design have been made. To meet the demand of the vibration effect better, a new structure have been devised and relative theoretical analysis and experimental researches have been made. The piezoelectric vibration model analysis is completed by Ansys software. By comparing the analysis, its characteristics were studied, and this provide a theoretical basis to the structure design of rain-removing system. The model of rain-removing has been built by Catia software. The structure of piezoelectric vibration and rain-removing system were improved, and good experimental results were achieved.1. ExordiumIn the research, the piezoelectric chip oscillator is used to remove rain. A single piezoelectric chip oscillator serves as a driver so that the raindrop can be removed along the elliptical motion curve. This paper made a great deal of research on the rain-removing results and relative factors.2. Piezoelectric materials and piezoelectric vibratorThe important performance parameters of piezoelectric material and the basic physical properties are discussed, including the electromechanical coupling coefficient, piezoelectric constant, mechanical quality factor and so on. In order to research the operating characteristics and application method of the single piezoelectric vibrator, the prototype is designed and manufactured. The experimental platform is built and the test analysis of the piezoelectric vibrator is completed.3. The trial manufacture and experimental analysis of the Single-chip piezoelectric vibrator.4. The finite element analysis of the Vibration-driven part.5. The trial manufacture and experimental research of the piezoelectric rain-removing system.