Membrane-coupled extrinsic fiber optic Fabry-Perot sensor probe
A sensor probe, coupled technology, applied in instruments, measuring devices, measuring ultrasonic/sonic/infrasonic waves, etc., can solve the problem of reducing the sensitivity of the static pressure of the sensor
Active Publication Date: 2018-03-27
STATE GRID CORP OF CHINA +3
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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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[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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The invention discloses a diaphragm-coupled extrinsic optical fiber Fabry-Perot sensor probe, which includes a support sleeve, an optical fiber ferrule mounting part, and an optical fiber ferrule arranged in the support sleeve through the optical fiber ferrule mounting part , The optical fiber arranged in the fiber mounting hole of the fiber ferrule, the front end of the fiber ferrule is coated with a first reflective film, the first reflective film at the front end of the fiber ferrule is located inside the support sleeve, and the front end of the support sleeve is fixed with a second reflector The second reflective film has the same reflectivity as the first reflective film, and the second reflective film and the fiber ferrule coated with the first reflective film form a Fab cavity. The invention enables the extrinsic method-Perco sensor to obtain a higher response frequency while using a thinner film, and improves the detection sensitivity of the partial discharge sensor, and the manufacturing process of the probe is simple and easy for sensor trial production in the experimental research stage.
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...
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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