MEMS (micro-electromechanical systems) electric field sensor and wireless power supply system and method thereof

Abstract

Provided is a wireless power supply system of an MEMS electric field sensor (micro-electromechanical systems), an energy supply method and an MEMS electric field sensor. The wireless power supply system comprises a signal source, a power amplifier, a transmitting antenna, a receiving antenna and a back end circuit; high frequency AC (alternating current) signal produced by the signal source is amplified through the power amplifier and then converted to high-frequency electromagnetic waves through the transmitting antenna; the high-frequency electromagnetic waves are received by the receiving antenna and converted to the electric energy; electrical energy required to meet the backend load is converted after the back-end circuit goes through a series of rectification, filtering, voltage andcurrent; the receiving antenna, the back end circuit and an electric field induction chips, and a signal processing circuit all together form the MEMS electric field sensor. The electric field sensorhas the advantages of adopting a wireless energy supply scheme to solve the question of energy supply for long-term sustainable work and guaranteeing potential isolation, and furthermore, small degreeof caused electric field distortion and high measurement accuracy.

Description

technical field [0001] The invention belongs to the technical field of electric power and relates to an electric field sensor, in particular to a MEMS electric field sensor for wireless power supply. Background technique [0002] The ground electromagnetic field strength of high-voltage transmission lines is an important basis for determining the minimum height of the line to the ground and planning the width of the line corridor. The electromagnetic environment under high-voltage transmission lines has received more and more attention, especially the electric field strength under high-voltage lines, which has become a problem that cannot be ignored in the field of environmental protection and electromagnetic compatibility technology. The synthetic electric field is a direct response to the operating state of the high-voltage transmission line and the electromagnetic environment near the transmission line. It has great application value for the on-line monitoring and fault d...

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Problems solved by technology

However, at present, these MEMS electric field sensors are powered by batteries, and there are potential safety hazards caused by battery replacement, and online real-time monitoring of the electric field cannot be realized.

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