High-temperature Fabry-Perot (FP) composite micro/nano fiber temperature and pressure sensor

A technology of temperature sensor and pressure sensor, applied in thermometers, thermometers with physical/chemical changes, fluid pressure measurement using optical methods, etc., can solve the problems of double-parameter cross-sensitivity, low temperature resistance limit, etc., to improve high temperature resistance Extreme, small size effect

Active Publication Date: 2015-11-11
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0005] The purpose of the present invention is to provide a high-temperature temperature and pressure optical fiber Fabry-Perot composite micro-nano sensor to solve the problems of low temperature resistance limit and double-parameter cross-sensitivity in the composite measurement of temperature and pressure in a high-temperature environment.

Method used

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  • High-temperature Fabry-Perot (FP) composite micro/nano fiber temperature and pressure sensor
  • High-temperature Fabry-Perot (FP) composite micro/nano fiber temperature and pressure sensor
  • High-temperature Fabry-Perot (FP) composite micro/nano fiber temperature and pressure sensor

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Embodiment

[0026] A kind of high temperature temperature and pressure optical fiber Fabry Perot composite micro-nano sensor of the present invention, its structure is as follows figure 1 As shown, it includes fiber access section 1, pressure sensor section 2, and temperature sensor section 3, which are connected in sequence, and is made of an endless single-mode photonic crystal fiber; fiber access section 1 is used to continuously introduce broadband optical signals into high-temperature environments The multifunctional sensor in the sensor will feed back the modulated signal; the pressure sensor section 2 is used to modulate the optical signal under high temperature and pressure, and the temperature sensor section 3 is used to modulate the optical signal under high temperature;

[0027] processing method:

[0028] Take two sections of uncut single-mode photonic crystal fiber of appropriate length, and use laser to process a cylindrical microcavity along the axis on one end face of the ...

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Abstract

The invention relates to a high-temperature Fabry-Perot composite micro / nano fiber temperature and pressure sensor, and belongs to the technical field of fiber sensors. The sensor comprises a fiber access segment, a pressure sensor segment and a temperature sensor segment, wherein the fiber access segment includes a solid fiber, the pressure sensor includes a hollow thin-wall fiber, and the temperature sensor includes another solid fiber. Cylindrical holes are formed in the end portions of the two solid fibers respectively in a femtosecond second processing method, and then welded to form an FP interference type pressure cavity, one fiber serves as the fiber access segment, the other fiber is cut and ground to the solid fiber of certain thickness, a temperature sensor is thus formed, and the difference between the cavities lengths of the temperature sensor and the pressure sensor is controlled to decouple double-parameter measurement. Compared with the prior art, the sensor of the invention is small in structural size, resistant to high temperature, capable of measure the temperature and pressure at the same time, and free of cross sensitivity of the two parameters.

Description

technical field [0001] The invention relates to a micro-nano sensor, in particular to a high-temperature temperature and pressure optical fiber Fabry-Perot (Fabry-Perot) composite micro-nano sensor, which belongs to the technical field of optical fiber sensors. Background technique [0002] The detection of temperature and pressure is widely used in various fields of the national economy. Simultaneously monitoring parameters such as temperature and pressure in a high-temperature environment can make a comprehensive evaluation of the operation of the system. In many application environments with high temperature (greater than 800°C), strong electromagnetic interference, and small size, current sensors cannot meet these extreme requirements, and fiber optic sensors can effectively solve these problems because of their inherent high temperature resistance, anti-electromagnetic interference, and small size. question. [0003] Existing optical fiber pressure sensors for high-tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G01L11/02
Inventor 姜澜江毅曹志涛王素梅刘达
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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