High-sensitivity fiber grating voltage sensor

A voltage sensor, fiber grating technology, applied in the direction of measuring current/voltage, instrument, measuring electrical variables, etc., can solve problems such as limiting the test range, test result deviation, etc., to improve safety and stability, avoid errors, and improve sensitivity and stability Effect

Active Publication Date: 2013-12-11
SHANGHAI BAIANTEK SENSING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The deformation of the piezoelectric ceramics under the action of the electric field is very small. The invention patent simply uses the deformation of the piezoelectric ceramics itself to measure, which will cause a large deviation in the test results and greatly limit the test range.

Method used

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  • High-sensitivity fiber grating voltage sensor

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Effect test

Embodiment 1

[0030] Such as figure 1 The fiber Bragg grating voltage sensor shown is composed of a piezoelectric ceramic 1, a fiber grating A2, a fork device 3 and a fiber Bragg grating B4, wherein the material of the fork device 3 is 4J36 iron-nickel alloy, and its structure is two X-shaped The metal rods placed across are hinged, and the hinged position is 1 / 6 of the total length of the metal rods from the bottom of the metal rods. The piezoelectric ceramic 1 is made of lead niobate piezoelectric ceramics, which is a cuboid, and the plane in contact with the fork-shaped device 3 There are two fixing holes on the top, and the bottom ends of the two metal rods of the fork device 3 are provided with embedded parts for extending into the fixing holes, which can be inserted into and nested in the fixing holes, and fixed with glue at the same time, the fiber grating A2 passes through the metal The fiber grating A2 is welded on the top of the fork device 3 with gold-tin solder, and the fiber Br...

Embodiment 2

[0035] Such as figure 1 The fiber Bragg grating voltage sensor shown is composed of a piezoelectric ceramic 1, a fiber grating A2, a fork device 3 and a fiber Bragg grating B4, wherein the material of the fork device 3 is 4J36 iron-nickel alloy, and its structure is two X-shaped The cross-placed metal rods are hinged, and the hinged position is 1 / 3 of the total length of the metal rod from the bottom end of the metal rod. The piezoelectric ceramic 1 is made of barium titanate piezoelectric ceramics, which is a cuboid. The plane in contact with the fork-shaped device 3 There are two fixing holes on the top, and the bottom ends of the two metal rods of the fork device 3 are provided with embedded parts for extending into the fixing holes, which can be inserted into and nested in the fixing holes, and fixed with glue at the same time, the fiber grating A2 passes through the metal The fiber grating A2 is welded on the top of the fork device 3 with gold-tin solder, and the fiber Br...

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PUM

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Abstract

The invention relates to a fiber grating voltage sensor. The fiber grating voltage sensor comprises piezoelectric ceramic, a fiber grating A, a fork device and a fiber grating B, wherein the fork device is a signal amplifying device. Voltage is converted into deformation of the piezoelectric ceramic by utilizing the inverse piezoelectric effect of the piezoelectric ceramic, the deformation is amplified through the fork device and transmitted to the fiber gratings, and temperature effect correction is performed through the fiber grating B. The high-sensitivity fiber grating voltage sensor is used for remotely monitoring voltage and acquiring sensitive and stable voltage signals.

Description

technical field [0001] The invention relates to a fiber grating voltage sensor. Background technique [0002] The current voltage sensors all need to be added to the circuit. These electronic devices are very easy to be damaged or affect the test data under the condition of strong electromagnetic interference and high voltage. Therefore, a safe and reliable sensor for measuring voltage is urgently needed in the power sector to replace the traditional voltage sensor. [0003] Piezoelectric ceramics are artificially synthesized polycrystalline piezoelectric materials, which are composed of countless tiny electric domains. These domains are actually small areas of spontaneous polarization, and the direction of spontaneous polarization is completely arranged randomly. When there is no external electric field, the polarization of each domain cancels each other, so there is no piezoelectric effect; only after It has piezoelectric effect only after polarization treatment. That i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
Inventor 文继华朱月红亢俊健
Owner SHANGHAI BAIANTEK SENSING TECH CO LTD
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