High-precision pile body omnibearing monitoring method based on fiber bragg grating

A fiber grating, high-precision technology, used in measuring devices, mapping and navigation, measuring inclination and other directions, can solve the problems of low efficiency, complex operation, poor accuracy, etc., to achieve the effect of low material cost, simple production and real-time response

Pending Publication Date: 2019-11-22
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] The traditional tilt monitoring method is to use a digital level to measure, which is not only complicated to operate, but also low in efficiency and poor in accuracy.
The electronic inclinometer devices in the prior art are mostly a

Method used

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  • High-precision pile body omnibearing monitoring method based on fiber bragg grating
  • High-precision pile body omnibearing monitoring method based on fiber bragg grating
  • High-precision pile body omnibearing monitoring method based on fiber bragg grating

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Example Embodiment

[0015] Step 1. Make the sensor according to the requirements of the plan. The sensor includes the outer wall of the sensor, fiber grating, cantilever beam, gravity pendulum, and sensing optical fiber. At both ends of the sensor, a threaded hole is reserved for connection, and two holes are used for sensing. Optical fiber channel

[0016] Step 2. Connect two fiber grating inclination sensors, and design the threaded connection screw rod with the threaded holes reserved at both ends of the sensor. The diameter is 10mm, the length is 120mm, and the effective thread distance is 30mm;

[0017] Step 3. Manufacturing method, including ABS rigid tube, threaded fixing part, threaded connecting rod, fiber grating inclination sensor, ABS tube is used as the outer tube of the method, the threaded fixing part connects the ABS tube and the sensor into a whole, the total length of the threaded fixing part The diameter of the disc is 90mm, the diameter of the disc is 55mm, and the thickness is 10m...

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Abstract

The invention relates to a high-precision pile body omnibearing monitoring method based on a fiber bragg grating. The high-precision pile body omnibearing monitoring method can be used for monitoringpile body inclination, pile body displacement and movement directions. The monitoring method adopts a fiber bragg grating sensing technology, is based on a device of the invention. The device is mainly composed of an ABS rigid pipe, a threaded fixing piece, a threaded connecting rod and a fiber bragg grating inclination angle sensor, and can sense the inclination degree of a pile body; meanwhile,fiber bragg gratings FBG1 and FBG2 in a sensor are pulled and pressed, the distance between the gratings changes and causes drifting of the center wavelength, and an inclination angle of the pile body, the pile body displacement and the movement direction are obtained through demodulating a wavelength value. The high-precision pile body omnibearing monitoring method has the advantages that the mounting is simple, the manufacturing cost is low, a measuring range of the inclination angle ranges from -7 to +7 degrees, a measuring range of an azimuth angle ranges from 0 to 360 degrees, the measuring precision can reach 0.01 degree, the maximum value of horizontal displacement measurement is 120 mm, and the horizontal displacement resolution can reach 0.25 mm.

Description

Technical field [0001] The invention relates to a monitoring method based on a fiber grating for high-precision monitoring of the full range of a pile body. Background technique [0002] The traditional tilt monitoring method is to use a digital level to measure, which is not only complicated in operation, low in efficiency, and poor in accuracy. The electronic inclinometer devices in the prior art are mostly aimed at lateral displacement monitoring of landslide areas and deep tunnel excavated soils, as well as dam lifting structure deformation monitoring, ground displacement monitoring, etc. They are not specifically developed for piles. Summary of the invention [0003] The invention provides a method for high-precision monitoring of the omni-directional pile body based on fiber grating; [0004] The existing electronic inclinometer needs to install the inclinometer tube in the vertical borehole of the component, and calculate the inclination of the component by observing the def...

Claims

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Application Information

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IPC IPC(8): G01C9/00G01B11/02G01B11/26G01D5/26G01D5/28
CPCG01C9/00G01B11/02G01B11/26G01D5/268G01D5/28
Inventor 胡启军雍沁何乐平
Owner SOUTHWEST PETROLEUM UNIV
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