Optical voltage sensor based on electroluminescent effect

Abstract

The invention discloses an optical voltage sensor based on an electroluminescent effect. An electroluminescent wire or a block-shaped electroluminescent material is used as a voltage sensing element, the electroluminescent wire is formed by the fact that an electroluminescent material is covered on the surface of a center circular metal electrode and wound on another metal wire electrode or tightly wraps another circular membrane electrode, and the block-shaped electroluminescent material is formed by the fact that two electrodes are bonded by a sheet-shaped electroluminescent material. Under the action of measured voltage, the sensing element can generate electroluminescence relevant to the measured voltage, an optical sensing signal is transmitted to a photoelectric detection circuit though a multimode optical fiber, and electroluminescence intensity can be measured to obtain the measured voltage. The optical voltage sensor based on the electroluminescent effect has the advantages that a working light source is not required, the service life is long, the insulativity is good, the structure is simple, the costs are low, the influence of unstable light source characteristics in traditional optical voltage sensors on voltage sensing performances can be effectively avoided, and the accurate and on-line measurement of voltage on a power transmission wire cable can be achieved.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic measurement and optical fiber sensing, relates to the technical field of electroluminescence, in particular to an optical voltage sensor based on the electroluminescence effect. Background technique [0002] With the increase of the transmission voltage level of the power system, the method of using the traditional electromagnetic voltage transformer to measure high voltage has revealed many shortcomings, such as poor electrical insulation capability, large volume and weight, and large electric power and magnetic field. Hysteresis loss, high cost, narrow frequency response frequency band, and potential safety hazards. Since 1970, people began to study optical voltage sensors. This new type of sensor has the advantages of strong electrical insulation capability, wide response frequency range, small size, light weight, and high safety, and has attracted widespread attention. [0003] At pre...

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Problems solved by technology

The Chinese patent application with the publication number 102752893A disclosed an electroluminescent display device for high voltage measurement on October 24, 2012, using an electroluminescent material layer, which corresponds to the light of different brightness generated during use. To determine the value range of the voltage, but this method realizes the display of the voltage level, and cannot realize the accurate measurement of the measured voltage

However, there are no relevant literature reports on optical voltage sensors using electroluminescent wires and bulk electroluminescent materials.

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