Vibration shielding type electric field sensor

An electric field sensor, shielded technology, applied in the field of electricity, to achieve the effect of no mechanical wear, small size, and low power consumption

Inactive Publication Date: 2011-08-31
南京行云环境监测技术开发有限公司
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  • Abstract
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  • Application Information

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

Method used

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  • Vibration shielding type electric field sensor
  • Vibration shielding type electric field sensor
  • Vibration shielding type electric field sensor

Examples

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Embodiment Construction

[0024] Below to figure 1 As an example, explain the structural principle of the piezoelectric electrostatic sensor. exist figure 1 In , the sensor is placed horizontally in the XOY plane. The sensor is composed of shielding electrode 2, compression nut 1, flexible hinge 3, piezoelectric stack 4, base, sensing electrode 5, and U-shaped spring 6. The shielding electrode 2, the compression nut 1, and the induction electrode 5 are all made of metal, the U-shaped spring 6, and the flexible hinge are made of elastic materials such as spring steel, 45 steel, or beryllium bronze, and the piezoelectric stack 4 is composed of multiple layers with pressure Electric effect materials are stacked. The flexible hinge 3 adopts a uniaxial structure, and the cutout adopts an elliptical structure, and its output displacement is relatively large, and the maximum stress is moderate.

[0025] exist figure 1 Among them, there are two pairs of shielding electrodes 2 and sensing electrodes 5, ...

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PUM

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/12
Inventor 季鑫源行鸿彦
Owner 南京行云环境监测技术开发有限公司
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