Round comb type minisize electric field sensor

An electric field sensor and sensor technology, applied in the field of sensors, can solve the problems of poor portability, high manufacturing precision requirements, and complicated installation.

Inactive Publication Date: 2006-05-10
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
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AI Technical Summary

Problems solved by technology

The mechanical electric field sensors that appeared in the early days mainly include rotary vane type, double ball type, etc., which have the advantages of simple structure and convenient production; the disadvantages are large volume, which leads to poor portability, high cost, and small range of use, etc. defect
The advantage of the optical electric field sensor is that the system responds quickly and has low noise. The disadvantage is that the manufacturing precision is high, which leads to high cost and complicated installation, and its detection range is generally limited to strong electric fields.

Method used

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  • Round comb type minisize electric field sensor
  • Round comb type minisize electric field sensor
  • Round comb type minisize electric field sensor

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Embodiment Construction

[0012] The circular comb-tooth miniature electric field sensor is mainly composed of three parts: comb-shaped fixed electrode 1 , comb-shaped shielding electrode 2 and sensing electrode 3 . The comb-shaped fixed electrode 1 and the comb-shaped shielding electrode 2 are made of conductive material with grid holes 4 opened thereon. The excitation signal of the sensor is input by the comb-shaped fixed electrode 1 and the comb-shaped shield electrode 2 , and the induction signal is output by the induction electrode 3 . Comb-shaped fixed electrode 1 and comb-shaped shielding electrode 2 are excited by comb-shaped driving, so that comb-shaped shielding electrode 2 and sensing electrode 3 undergo periodic relative motion, that is, vibration is generated along the normal direction in FIG. 2 . The structure of the circular comb-tooth miniature electric field sensor is as follows: figure 1 As shown, it consists of three parts: comb-shaped fixed electrode 1 , comb-shaped shield electrod...

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Abstract

Disclosed is a circular comb-type micro electric field sensor which comprises: comb-type fixed electrode (1) and comb-type bucking electrode (2) distributed along vibration direction with space on circumference; on the comb-type bucking electrode (2) being opened grid hole (4); a sensing electrode (3) being positioned under the grid hole (4). The inventive sensor has the advantages of having accurate offset and good periodicity, of facilitating to detect weak electric field signal and of having less signal interference between grid holes.

Description

technical field [0001] The invention relates to a sensor, in particular to a circular comb-tooth miniature electric field sensor. Background technique [0002] Electric field sensors are widely used in geoscience fields such as atmospheric circulation research, geological disaster forecasting, meteorological and dust forecasting, air pollution detection, etc., as well as the measurement of electric field distribution at the end of the motor and under high-voltage overhead lines, and the analysis of discharge phenomena in electrical sealing devices. Industrial production fields such as ion flow field near ultra-high voltage transmission lines [and long-gap glow discharge characteristics, etc., also have important applications in aerospace, electrostatic protection, biological physiology, testing and living environment monitoring. [0003] There are many types of electric field sensors, which can be roughly divided into two types: mechanical and optical according to their work...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/12
Inventor 夏善红陶虎
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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