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Novel high voltage optical fiber sensing device

A technology of optical fiber sensing and high voltage, which is applied in the directions of measuring devices, voltage/current isolation, measuring current/voltage, etc. It can solve the problems of complex interference detection devices, lack of verification of long-term stability, and restrictions on popularization and use, etc., to achieve flexible use , Improve the test accuracy and ensure the effect of life

Inactive Publication Date: 2012-07-11
XIAN JINHE OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the interference detection device used in this scheme is still a relatively complex, high-cost, long-term stable and unverified instrument, which limits the popularization and use of this scheme to a certain extent.

Method used

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  • Novel high voltage optical fiber sensing device
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  • Novel high voltage optical fiber sensing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Such as figure 1 and figure 2 A new type of high-voltage optical fiber sensing device shown includes electrode one 35, ground potential electrode 36 and at least one optical fiber sensitive unit 2 between electrode one 35 and ground potential electrode 36, and the high-voltage bus 30 passes through electrode one 35 and ground potential electrode 36. The ground potential electrode 36 loads the high voltage of the high-voltage bus 30 on the optical fiber sensitive unit 2, and the optical fiber sensitive unit 2 includes a cylinder 10, and at least one curved groove 4 is distributed on the side surface of the cylinder 10 , A-side deformed teeth 4-1 and B-side deformed teeth 4-2 are arranged on opposite surfaces of the groove 4, and the A-side deformed teeth 4-1 and B-side deformed teeth 4-2 correspond to each other alternately , and a signal optical fiber 6 is clamped between the A-side deformed tooth 4-1 and the B-side deformed tooth 4-2, and the A-side deformed tooth 4-...

Embodiment 2

[0046] Such as image 3 As shown, the difference between this embodiment and Embodiment 1 is only that the cylinder 10 selects a crystal material with good temperature performance and inverse piezoelectric performance, wherein the Y axis of the crystal material coincides with the central axis of the cylinder 10, The X-axis of the crystal crystal material is located in a radial direction of the cylinder 10, and the voltage of the electrode 35 and the ground potential electrode 36 is applied to the X-axis direction of the crystal material forming the cylinder 10. When the voltage of the electrode 35 and the ground potential electrode 36 changes, The Y-axis direction of the crystal material deforms and expands, that is, the length of the cylinder 10 made of the crystal material also changes, so that the A-side deformation teeth 4-1 and B on the opposite two surfaces in the groove 4 The distance between the side deformation teeth 4-2 changes, so that the bending curvature of the s...

Embodiment 3

[0048] Such as Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that there are two or more optical fiber sensitive units 2, which are connected in series through a metal tube 37 and installed in an insulating tube 38, the insulating tube 38 is filled with insulating polyurethane 39 in the gap, and corona discharge rings 34 are arranged on both sides of the insulating tube 38, and the voltage of the high-voltage bus 30 is applied to a plurality of optical fiber sensitive units connected in series through electrode one 35 and ground potential electrode 36 2, so that the device can monitor the voltage of the high-voltage bus 30 below 500kv, and the high-voltage bus 30 of a higher voltage level can be monitored by connecting more optical fiber sensitive units 2 in series. The corona discharge ring 34 can reduce the electric field gradient, so that the electric field distribution of the electrostrictive or inverse piezoelectric material included in the...

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Abstract

The invention discloses a novel high voltage optical fiber sensing device, which comprises an electrode I, a ground potential electrode and at least one optical fiber sensitive unit which is located between the electrode I and the ground potential electrode, wherein a high-voltage bus loads the high voltage of the high-voltage bus on the optical fiber sensitive unit through the electrode I and the ground potential electrode; the optical fiber sensitive unit comprises a cylinder; at least one curved groove is distributed on the side face of the cylinder; A-sided deformation teeth and B-sided deformation teeth are distributed on the two opposite surfaces in the groove and correspond to each other in a staggered way; a signal optical fiber is clamped between the A-sided deformation teeth and the B-sided deformation teeth and is connected with an optical cable; the optical cable is connected with a testing unit; and the testing unit is connected with a processing unit. According to the novel high voltage optical fiber sensing device, subtle deformation can be detected by greatly increasing the number of the deformation teeth and greatly increasing the length of the signal optical fiber.

Description

technical field [0001] The invention relates to an optical voltage sensing device, in particular to a novel high-voltage optical fiber sensing device. Background technique [0002] At present, the measurement methods used in fiber optic high voltage sensors mainly include light polarization measurement, light interferometry and wavelength modulation measurement. The measurement of the polarization state of light is mainly based on the Faraday magneto-optic effect. The magneto-optic crystal is used to change the polarization direction of light under the external field to achieve the test purpose. It is a relatively mature sensor with relatively mature research and a small number of commercial applications. Optical interferometry mainly uses the external field to change the optical path difference of coherent light for measurement, mainly based on the measurement of Michelson interferometer or Mach-Zehnder interferometer. Wavelength modulation measurement is a method of measu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R15/24
Inventor 杜兵
Owner XIAN JINHE OPTICAL TECH
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