Research on Electromagnetic Interference Resistance of Piezoelectric VibrationAcceleration Sensor

Abstract

Because of the importance of the electromagnetic interference resistance in the modern life, the electromagnetic shielding of the piezoelectric vibration acceleration sensor is analyzed in this paper. The shell of the piezoelectric vibration acceleration sensor is taken as a three-layer rectangular cavity with apertures. The shielding effectiveness of the shell irradiated by plane electromagnetic wave is modelled using transmission line theory. In the modeling process, incident angle and polarization angle of the plane electromagnetic wave are introduced, and the scattering voltage produced on the outer aperture is taken as the radiation source. The aperture is taken as the asymmetrical coplanar stripline and the rectangular cavity is taken as a rectangular waveguide with one end completely open and another end completely closed. The shielding effectiveness of the cavity is calculated using transmission line theory. Compared to the others before, this method improves the completeness of the model, computation speed, and the shielding effectiveness which supplies good reference for engineering practice.

UV-curable electromagnetic shielding composite films produced through waterborne polyurethane-acrylate bonded graphene oxide: preparation and effect of different diluents on the properties

“…These electronic devices bring convenience to people's lives, but also generate electromagnetic radiation pollution, so it is necessary to take some measures to eliminate or reduce the pollution of electromagnetic radiation and the most effective method to do that is to shield the electromagnetic wave produced by electrical/electronic equipment (1,2). The traditional shielding electromagnetic wave method uses metal and metal compound materials to shield electromagnetic waves, but this has too many disadvantages such as the difficult process, heaviness, bad environmental stability, easy corrosion by some gas and liquid in the air, unfavorable control of electromagnetic wave band and so on, limiting the scope of its application.…”