System and method for wireless supply of energy to MEMS electric field sensor, and corresponding electric field sensor

Abstract

The invention discloses a system and method for the wireless supply of energy to an MEMS electric field sensor, and the MEMS electric field sensor. The system comprises a signal source, a power amplifier, a transmitting antenna, a receiving antenna, and a rear-end circuit. A high-frequency AC signal generated by a signal source is amplified by a power amplifier, and then is converted by the transmitting antenna into a high-frequency electromagnetic wave. The receiving antenna receives the high-frequency electromagnetic wave, and converts the high-frequency electromagnetic wave into electric energy. The rear-end circuit carries out the rectification, filtering and voltage and current conversion to generate electric energy meeting the demands of a rear-end load. The receiving antenna, the rear-end circuit, an electric field induction chip and a signal processing circuit jointly form the MEMS electric field sensor. The electric field sensor employs a wireless energy supply scheme, solvesan energy supply problem of long-time continuous work, and guarantees the potential isolation. Meanwhile, the integrated sensor is small in size, and the caused distortion of the electric field is small. The measurement accuracy is high.

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 wireless energy supply system for a MEMS electric field sensor and a wireless energy supply MEMS electric field sensor. 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 ...

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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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