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Diaphragm coupling type extrinsic fiber fabry-perot sensor probe

A sensor probe, coupled technology, used in instruments, measuring devices, measuring ultrasonic/sonic/infrasonic waves, etc., can solve problems such as reducing the static pressure sensitivity of sensors

Active Publication Date: 2016-01-06
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The partial discharge detection sensor requires high static pressure sensitivity and high response frequency, and the diameter of the fiber ferrule is 2.5mm. The F-P probe directly adopts the support structure often needs a thicker diaphragm, and the thicker Diaphragm reduces sensor static pressure sensitivity

Method used

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  • Diaphragm coupling type extrinsic fiber fabry-perot sensor probe
  • Diaphragm coupling type extrinsic fiber fabry-perot sensor probe
  • Diaphragm coupling type extrinsic fiber fabry-perot sensor probe

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0021] The membrane-coupled extrinsic fiber Fabry-Perot sensor probe of the present invention, such as figure 1 As shown, it includes a supporting sleeve 1, an optical fiber ferrule mounting part 2, an optical fiber ferrule 3 set in the supporting sleeve 1 through the optical fiber ferrule mounting part 2, and an optical fiber 4 set in the optical fiber mounting hole of the optical fiber ferrule 3 The front end of the optical fiber ferrule 3 is coated with a first reflective film 5, the first reflective film 5 at the front end of the optical fiber ferrule 3 is located inside the support sleeve 1, and the front end of the support sleeve 1 is fixed with a second reflective film 6 , the second reflective film 6 has the same reflectivity as the first reflective film 5, thereby obtaining a sensor operating curve with a larger linear modulation area, ...

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Abstract

The invention discloses a diaphragm coupling type extrinsic fiber fabry-perot sensor probe, which comprises a support sleeve, an optical fiber stub installation part, an optical fiber stub arranged in the support sleeve via the optical fiber stub installation part, and an optical fiber arranged in the optical fiber installation hole of the optical fiber stub. A first reflection film is coated onto the front end of the optical fiber stub. The first reflection film at the front end of the optical fiber stub is positioned inside the support sleeve. The front end of the support sleeve is fixedly provided with a second reflection film. The second reflection film and the first reflection film are the same in reflectivity. The second reflection film and the optical fiber stub with the first reflection film together form a fabry-perot cavity. According to the technical scheme of the invention, a fabry-perot sensor is higher in response frequency while being provided with a thinner diaphragm. Therefore, the detection sensitivity of the partial discharge sensor is improved. At the same time, the probe is simple in manufacturing process. During the experiment and investigation process, the trial production of the sensor can be easily conducted.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensors, in particular to a diaphragm-coupled extrinsic optical fiber Fabry-Perot sensor probe. Background technique [0002] On-line partial discharge monitoring of large power equipment has always been a difficult problem for power operation units. Over the years, scholars and industrial engineers have tried to solve this problem in different ways. Among them, the method of relying on the detection of partial discharge-induced ultrasonic signals has been attracting attention. The traditional partial discharge ultrasonic detection is mainly based on piezoelectric ceramic sensors, but it has not been widely used in industrial sites due to restrictions such as severe interference from the strong electromagnetic environment at the detection site. With the development of fiber optic sensor technology in the past 30 years, many researchers have discovered that the diaphragm-coupled extrinsic fib...

Claims

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Application Information

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IPC IPC(8): G01H9/00G01R31/12
Inventor 陈连凯聂德鑫邓建钢皮本熙徐立新罗汉武杨志华刘诣杨永辉张连星张海龙卢文华程林罗先中金莹王友旭郑昌佶张伟超
Owner STATE GRID CORP OF CHINA
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