Large-scale fiber grating rust sensor

A fiber grating, long-range technology, applied in instruments, measuring devices, optical devices, etc., can solve problems such as it is difficult to directly reflect the corrosion process of steel bars, and achieve the effect of large deformation range, long service life and overcoming small range.

Active Publication Date: 2018-10-19
江西云沛科技发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These two methods have high precision, but it is difficult to directly reflect the corrosion process of steel bars because the main body of the corrosion is not steel bars

Method used

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  • Large-scale fiber grating rust sensor
  • Large-scale fiber grating rust sensor
  • Large-scale fiber grating rust sensor

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing and embodiment the present invention is further described:

[0032] see Figure 1-10 .

[0033] The invention discloses a large-range optical fiber grating corrosion sensor, which comprises an upper cavity 6, a lower cavity 7, an L-shaped connector 9, and a grating 3, and the upper cavity 6 is arranged in the cavity of the lower cavity 7 , the two ends of the lower cavity 7 are provided with elastic connecting devices, and the upper cavity 6 and the lower cavity 7 are elastically connected by elastic connecting devices; Lower cavity groove 15, the bottom of the upper cavity 6 is provided with an upper cavity groove 14 with an opening downward, and the upper cavity groove 14 fits with the opening of the lower cavity groove 15 to form a detection Cavity, the bottom and both sides of the lower cavity 7 corresponding to the detection cavity are provided with through holes 13, the detection cavity is provided with threaded ste...

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Abstract

The invention relates to the field of rust sensors and particularly relates to a large-range fiber grating rust sensor which comprises an upper cavity, a lower cavity, an L-shaped connecting member and a grating. The upper cavity is arranged in a cavity of the lower cavity, the upper end of a bottom plate of the lower cavity is provided with a lower cavity groove with an upward opening, the bottomof the upper cavity is provided with an upper cavity groove with a downward opening, and the upper cavity groove opening and the lower cavity groove opening are fitted to form a detection cavity which is internally provided with a threaded steel. An upper end of the L-shaped connecting member is horizontally provided with an optical fiber, the grating is arranged on the optical fiber, and two sides of the cavity of the lower cavity at two ends of the optical fiber are connected. The threaded steel in the detection cavity rusts, the volume is increased, the upper cavity is pushed to move upward, thus the fiber grating which is in contact with the L-shaped connecting member generates a corresponding wavelength shift, the fiber grating is used as a sensing element, and the disadvantage thata traditional electrical sensor is susceptible to electromagnetic interference and has poor short-term stability is overcome.

Description

technical field [0001] The invention relates to the field of corrosion sensors, in particular to a large-range optical fiber grating corrosion sensor. Background technique [0002] Fiber Bragg grating sensors can realize direct measurement of physical quantities such as temperature and strain. Because the fiber grating wavelength is sensitive to temperature and strain at the same time, that is, the temperature and strain cause the fiber grating coupling wavelength shift at the same time, so the temperature and strain cannot be distinguished by measuring the fiber grating coupling wavelength shift. Therefore, solving the cross-sensitivity problem and realizing the differential measurement of temperature and stress are the prerequisites for the practical application of the sensor. The stress and temperature changes are determined by certain techniques to realize the differential measurement of temperature and stress. [0003] Strain fiber optic sensors are the most widely us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02G01B11/16
CPCG01B11/02G01B11/16
Inventor 周峰
Owner 江西云沛科技发展有限公司
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