Sensitivity-controllable optical fiber Fabry-Perot air pressure sensor based on Vernier effect

An air pressure sensor and vernier effect technology, which is applied in the direction of fluid pressure measurement using optical methods, can solve the problems of reduced scope of application and low sensitivity, and achieve the effect of expanding the range of use.

Inactive Publication Date: 2019-01-11
WUHAN UNIV OF TECH
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  • Abstract
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Problems solved by technology

However, this simple open-cavity air pressure sensor has low sensitivity, and it is difficult to measure the air pressure less than 0.1MPa, and the scope of application is greatly reduced.

Method used

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  • Sensitivity-controllable optical fiber Fabry-Perot air pressure sensor based on Vernier effect
  • Sensitivity-controllable optical fiber Fabry-Perot air pressure sensor based on Vernier effect
  • Sensitivity-controllable optical fiber Fabry-Perot air pressure sensor based on Vernier effect

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] refer to Figure 1 to Figure 6 As shown, the controllable sensitivity optical fiber Fabry-Perot air pressure sensor based on the vernier effect in an embodiment provided by the present invention includes a capillary glass tube 1, an incident optical fiber 3 and a reflective optical fiber 4, and an incident optical fiber 3 and a reflective optical fiber 4 They are sequentially distributed in the capillary glass tube 1 at intervals, an opening 2 is provided on the side wall of the capillary glass tube 1 , and incident optical fibers 3 and reflective optical fibers 4 are distributed on both sides of the opening 2 .

[0027] Further, the incident optical fiber 3 and the reflective optical fiber 4 are respectively fixed at both ends of the capillary glass tube 1 .

[0028] Further, the outer end surface of the reflective optical fiber 4 is connecte...

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Abstract

The invention discloses a sensitivity-controllable optical fiber Fabry-Perot air pressure sensor based on the Vernier effect. The sensor comprises a capillary glass tube, incident optical fibers, andreflective optical fibers. The incident optical fibers and the reflective optical fibers are sequentially distributed in the capillary glass tube at intervals. An opening is formed in the side wall ofthe capillary glass tube. The incident optical fibers and the reflective optical fibers are distributed on both sides of the opening. According to the sensitivity-controllable optical fiber Fabry-Perot air pressure sensor based on the Vernier effect, a variety of different sensor sensitivity amplification factors are provided, thereby being suitable for measurement of different pressures, and enlarging the use range of the sensor.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensors, in particular to a controllable sensitivity optical fiber Fabry-Perot air pressure sensor based on the vernier effect. Background technique [0002] Air pressure is an important parameter in industrial production process, pipeline interior, environmental monitoring and other tests. At present, the technology used is mainly MEMS technology, but because the optical fiber sensor has small size, light weight, anti-electromagnetic interference, high measurement accuracy and easy to realize distributed Therefore, it has become a research direction to apply fiber optic sensor technology to air pressure measurement. Among them, the diaphragm pressure sensor is a main direction of people's research, and the diaphragm materials are selected from quartz (Liu S, Wang Y, Liao C, et al.Nano silica diaphragm in-fiber cavity for gas pressure measurement.[J] .Scientific Reports, 2017,7(1).), Graphe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L11/02
CPCG01L11/02
Inventor 戴玉堂陈鹏代圣力
Owner WUHAN UNIV OF TECH
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