The Mechanism Research Of A Windshield-rainwater Removing Technology Of A Vehicle Based On Vibration

The windshield wiper is a very important safety-insurance part in the vehicle. As a result, the performance of windshield wiper becomes an important object needed to be controlled when we are designing. Nowadays, the rubber stick of widely used mechanical wiper is liable to age. The electrical machine is liable to overburn when it is stuck. And the wiper will obstruct the view. In this paper, we develop a new kind of windshield-rainwater removing technology based on vibration which abandons the mechanical structure. We have already applied for the prediction program of Guangdong office of education.In order to decide what theory to be utilized as the core mechanism in the technology, in this paper, we analyze theoretically, use finite element simulation and design experimental study to verify the feasibility to use the mechanism in the technology.Firstly, we collect the articles in this field for the first time and conclude three kinds of mechanism in the technology which are ultrasonic cavitation, the ultrasonic atomization and the microflow drive technique. By analyzing the relative theory and setting up the experimental table, we exclude the ultrasonic cavitation and the ultrasonic atomization and pick the microflow drive technique as the core mechanism. Then we conclude four different kinds of vibration to drive microflow(a drop in this paper) on a solid which are symmetry low frequency vibration, the orthogonality symmetry low frequency vibration, the asymmetric low frequency vibration and the symmetry high frequency vibration. We prepare relative theories sufficiently for the following IES and experimental study in this part.Secondly, we use the COMSOL MULTIPHYS software which is used in finite element simulation to model a vibrating solid supporting a drop on it. The vibrating signals are represented above. We found that when keeping the vibrating source constant, the moving distance of the drop has a maximum. The maximum has a positive correlation with the power of the vibrating source. With the same power, the frequency of the vibration will impact the direction and the moving distance of the drop. With the same power, the driving effect of the orthogonality symmetry low frequency vibration and the asymmetric low frequency vibration is better.At last, we set up a experimental platform to test the simulation. We use the wedge-shape transducer, the double channel signal source and the power amplifier to set up the platform. We load the vibration signal onto the glass and contrast the simulation result of the COMSOL MULTIPHYS in order to checkout the feasibility of the microflow driving technique.