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Piston type hydrargyrum optical fiber Bragg grating tilt angle sensor and using method thereof

An inclination sensor, piston-type technology, applied in the direction of instruments, optical devices, measuring devices, etc., to achieve the effect of reducing cross-sectional area, improving inclinometer sensitivity and measurement range

Active Publication Date: 2015-01-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a piston-type mercury fiber Bragg grating inclination sensor and its use method, which are used to solve the real-time on-line detection of slope inclination and solve the structure and installation of the optical fiber Bragg grating inclination sensor during real-time on-line detection of slope inclination question

Method used

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  • Piston type hydrargyrum optical fiber Bragg grating tilt angle sensor and using method thereof
  • Piston type hydrargyrum optical fiber Bragg grating tilt angle sensor and using method thereof
  • Piston type hydrargyrum optical fiber Bragg grating tilt angle sensor and using method thereof

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Effect test

Embodiment 1

[0044] Embodiment 1: as Figure 1-4 As shown, a piston-type mercury fiber Bragg grating inclination sensor includes mercury column metal shell 1, mercury column 2, mercury column support frame 3, shell 4, optical fiber outlet hole 5, output optical fiber 6, pressure transmission piston 7, dowel rod 8. Optical fiber Bragg grating 9, equal strength cantilever beam 10, cantilever beam support column 11, base 12; wherein mercury 2 is filled in mercury column metal shell 1, mercury 2 is sealed in mercury column metal shell 1 through pressure transmission piston 7, and mercury column The column metal shell 1 is fixed in the shell 4 by the mercury column support frame 3, the shell 4 is welded above the base 12, the lower end of the pressure transmission piston 7 is connected to the upper end of the dowel rod 8, and the lower end of the dowel rod 8 is connected to the cantilever beam 10 of equal strength. At the free end, the fiber Bragg grating 9 is pasted on the upper and lower wall...

Embodiment 2

[0050] Embodiment 2: as Figure 1-4 As shown, a piston-type mercury fiber Bragg grating inclination sensor includes mercury column metal shell 1, mercury column 2, mercury column support frame 3, shell 4, optical fiber outlet hole 5, output optical fiber 6, pressure transmission piston 7, dowel rod 8. Optical fiber Bragg grating 9, equal strength cantilever beam 10, cantilever beam support column 11, base 12; wherein mercury 2 is filled in mercury column metal shell 1, mercury 2 is sealed in mercury column metal shell 1 through pressure transmission piston 7, and mercury column The column metal shell 1 is fixed in the shell 4 by the mercury column support frame 3, the shell 4 is welded above the base 12, the lower end of the pressure transmission piston 7 is connected to the upper end of the dowel rod 8, and the lower end of the dowel rod 8 is connected to the cantilever beam 10 of equal strength. At the free end, the fiber Bragg grating 9 is pasted on the upper and lower wall...

Embodiment 3

[0066] Embodiment 3: as Figure 1-4 As shown, a piston-type mercury fiber optic Bragg grating inclination sensor includes mercury column metal shell 1, mercury 2, mercury column support frame 3, shell 4, optical fiber outlet hole 5, output optical fiber 6, pressure transmission piston 7, dowel rod 8. Optical fiber Bragg grating 9, equal strength cantilever beam 10, cantilever beam support column 11, base 12; wherein mercury 2 is filled in mercury column metal shell 1, mercury 2 is sealed in mercury column metal shell 1 through pressure transmission piston 7, and mercury column The column metal shell 1 is fixed in the shell 4 by the mercury column support frame 3, the shell 4 is welded on the top of the base 12, the lower end of the pressure transmission piston 7 is connected to the upper end of the dowel 8, and the lower end of the dowel 8 is connected to the cantilever beam 10 of equal strength. At the free end, the fiber Bragg grating 9 is pasted on the upper and lower walls...

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Abstract

The invention relates to a piston type hydrargyrum optical fiber Bragg grating tilt angle sensor and a using method of the piston type hydrargyrum optical fiber Bragg grating tilt angle sensor, and belongs to the technical field of photoelectron measurement. The piston type hydrargyrum optical fiber Bragg grating tilt angle sensor comprises a mercury column metal shell, mercury, mercury column supporting frames, an outer shell, an optical fiber lead-out hole, a leading-out optical fiber, a pressure transmission piston, a dowel bar, an optical fiber Bragg grating, an equal-strength cantilever beam, a cantilever beam supporting pillar and a base. The tilt angle change of a target measured by the sensor is calculated according to the relational expression of the central wavelength difference value delta lambada B of the optical fiber Bragg grating arranged on the upper wall and the lower wall of the equal-strength cantilever beam in a bonded mode and the tilt angle theta of the sensor. The piston type hydrargyrum optical fiber Bragg grating tilt angle sensor and the using method can improve tilt measurement sensitivity of the sensor and enlarge the measurement range of the sensor, the sensor is high in electromagnetic interference resistance and corrosion resistance, and is suitable for long-term monitoring of a side slope; and the sensor is simple in structure and convenient to operate.

Description

technical field [0001] The invention relates to a piston-type mercury optical fiber Bragg grating inclination sensor and a using method thereof, which belong to the technical field of optoelectronic measurement. Background technique [0002] my country is a mountainous country, and the mountainous area accounts for about 2 / 3 of the country's total area. It is one of the countries with frequent landslides in the world. The landslide activity is related to the composition material, mechanical properties, shape, stratification, weak surface, structural surface and other factors of the landslide body, and the mechanism is relatively complicated. [0003] Internal displacement monitoring of slopes has always been an important topic concerned by geotechnical engineering circles. Traditional mobile and fixed inclination sensors have been widely used in the monitoring of internal displacement of slopes, but traditional inclination sensors have major deficiencies, such as drift erro...

Claims

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Application Information

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IPC IPC(8): G01B11/26
Inventor 谢涛李川李英娜赵振纲张长胜欧阳鑫刘爱莲吴文兵
Owner KUNMING UNIV OF SCI & TECH
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