Vibration shielding type electric field sensor

Abstract

The invention provides a vibration shielding type electric field sensor which comprises an elastic component, a flexible hinge, a piezoelectric stack, a base, shielding electrodes and induction electrodes, wherein the shielding electrodes and the induction electrodes are arranged pairwise, the X-direction end of the flexible hinge is fixed on the base, the induction electrodes are fixed on the base in an insulating manner, two ends of the piezoelectric stack are fixedly arranged on the inner walls of two sides in the X direction of the flexible hinge, the shielding electrodes are arranged at an outer end in the Y direction of the flexible hinge and press an outer surface in the X direction of the flexible hinge through the elastic component, moreover, the shielding electrodes are earthed and arranged above the induction electrodes arranged pairwise. In the invention, mechanical motion is generated on the basis of the electrostriction principle of a piezoelectric material and is amplified by the flexible hinge to push the earthed shielding electrodes to reciprocate periodically, induction charges on the induction electrodes change periodically, the induction charges are in direct proportion to an electric field, the change of the charges forms current, and the current is amplified by a subsequent circuit to obtain the relationship between the current and the electric field.

Description

technical field [0001] The invention belongs to the field of electricity and relates to sensor technology and measurement of electrostatic field. Background technique [0002] In industrial production, static electricity is harmful to a certain extent. Static electricity monitoring is an important task related to product quality and production safety. In terms of meteorology, the atmospheric electrostatic field is a key characteristic parameter for thunderstorm and lightning monitoring. Electrostatic monitoring in industries such as oil and mines is also an important task. At present, the monitoring of electrostatic field mainly adopts inductive electrostatic tester and field grinding electrostatic tester. Inductive electrostatic tester has a specified test distance limit, and there is charge leakage; There is no charge leakage, but the drive motor affects its continuous work for a long time, which is unstable and consumes a lot of power. Contents of the invention ...

AI Technical Summary

Problems solved by technology

At present, the monitoring of electrostatic field mainly adopts inductive electrostatic tester and field grinding electrostatic tester. Inductive electrostatic tester has a specified test distance limit, and there is charge leakage; No charge leakage, but the driving motor affects its continuous work for a long time, unstable and high power consumption

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