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Temperature and strain dual-parameter sensing system and its measurement method

A technology of sensing system and measuring method, applied in the direction of measuring device, converting sensor output, using optical device to transmit sensing components, etc., can solve the problems of large error and less data utilization, and achieve the effect of accurate measurement

Active Publication Date: 2020-06-19
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This measurement method can only measure a single parameter, and select a single wavelength or trough, the data utilization is less, and the error is large

Method used

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  • Temperature and strain dual-parameter sensing system and its measurement method
  • Temperature and strain dual-parameter sensing system and its measurement method
  • Temperature and strain dual-parameter sensing system and its measurement method

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029]In the embodiment of the present invention, a temperature and strain dual-parameter sensing system is first provided, including a broadband light source, an input single-mode fiber, a photonic crystal fiber, an output single-mode fiber, and a spectrometer; an input single-mode fiber, a photonic crystal fiber, and an output single-mode fiber. The mode fibers are concentrically connected in turn, and the light emitted from the broadband light source is incident on the photonic crystal fiber through the input single-mode fiber, which excites the core fundamental mode, core high-order mode and cla...

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Abstract

The invention discloses a temperature and strain sensing system and a measurement method thereof. A broadband light source, an input single-mode optical fiber, a photonic crystal fiber, an output single-mode fiber and a spectrograph are connected sequentially, wherein the photonic crystal fiber supports a basic mode and a high-order mode. The system can measure the temperature and strain at the same time through the interference between the fiber core basic mode and the fiber core high-order mode. The system employs the Fourier transform, and selects a specific stable mode to carry out the inverse Fourier transform through programming, thereby obtaining the temperature and strain response transmission spectrum in different modes. The system combines with a sensitivity matrix, selects the same peak or valley, measures the drift quantities under different temperatures and strains and obtains the temperature and strain response curve of a sensor.

Description

technical field [0001] The invention belongs to the field of optical fiber sensing, in particular to a temperature and strain dual-parameter sensing system and a measuring method thereof. Background technique [0002] With the development of the times, the requirements for sensors are getting higher and higher. Due to its own advantages, fiber optic sensors have always played an important role in scientific research and industrial applications. [0003] Photonic crystal fiber (PCF) is a novel fiber with unique optical properties. The structure of the photonic crystal fiber itself is a two-dimensional optical waveguide array with defects, and its cladding is made of a material whose refractive index is different from that of the core, and the circular holes extending along the fiber axis are periodically arranged. These regularly arranged round holes can be air holes or other doped materials. By adjusting the size, shape, and position distribution of the holes, PCFs with d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D5/353
CPCG01D5/35306
Inventor 余海湖郑洲郑羽曹蓓蓓江昕李政颖桂鑫姜德生
Owner WUHAN UNIV OF TECH
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