A 3D Displacement Monitoring Method for Civil Structure Points Based on Distributed Optical Fiber Sensing Technology
A technology of distributed optical fiber and sensing technology, which is applied in the field of civil structure monitoring, can solve the problems of less quantitative detection, the geometric properties of the optical fiber sensing network do not meet the requirements of static structure, and the difficulty of quantitative monitoring of displacement field, etc. Effect
Active Publication Date: 2020-04-14
GUANGDONG POWER GRID CO LTD +1
View PDF13 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Distributed optical fiber sensing technology is mostly due to the fact that the geometric properties of the constructed optical fiber sensing network do not meet the requirements of statically indeterminate structures, it is difficult to obtain strain analysis displacement from measurement, and it is difficult to quantitatively monitor various displacement fields
At present, the main function of distributed optical fiber sensing technology is used for qualitative monitoring such as early warning, and it is rarely used in quantitative detection.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0033] Such as Figure 1-2 As shown, this embodiment provides a method for monitoring the three-dimensional displacement of civil structure points based on distributed optical fiber sensing technology, which specifically includes but is not limited to the following steps:
[0034] S1 Drive into the reference pile within a certain distance from the civil structure to be tested, and set at least three reference points on the upper part of the reference pile for connecting the sensing optical cable. The reference point and the civil structure point to be measured form a polygonal pyramid structure. Use at least three points on the benchmark pile to form the bottom surface of the polygonal cone, select at least one point on the civil structure to be tested to form the apex of the polygonal cone, and the displacement between the points on the benchmark pile is negligible.
[0035] Among them, the reference pile is an open-ended steel pipe concrete pile, and the pile end is fixed by...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to the technical field of civil structure monitoring, and more specifically provides a three-dimensional displacement monitoring method for a civil structure point based on a distributed optical fiber sensing technology. The method comprises the steps of driving a reference pile, paying off an optical cable, fixing a sensing optical cable, standing and monitoring, and calculating the displacement of three directions of a measured point space according to the strain of the sensing optical cable and the like. The distributed optical fiber sensing technology is successfullyapplied to the quantitative monitoring of the three-dimensional displacement of the civil structure point, quantitative analysis is made through a formula, a new function of the distributed optical fiber sensing technology is excavated, and the change conditions of a civil structure are comprehensively reflected. At the same time, an optional monitoring method is provided for the civil structure that requires electromagnetic interference resistance, high temperature resistance, corrosion resistance and long-term monitoring.
Description
technical field [0001] The invention relates to the technical field of civil structure monitoring, and more specifically, to a three-dimensional displacement monitoring method for civil structure points based on distributed optical fiber sensing technology. Background technique [0002] Distributed optical fiber sensing technology is a sensing technology that uses optical fiber as the sensing element and signal transmission medium. It can monitor the state change of each distributed measuring point along the optical fiber. It is widely used in landslides, geological subsidence, transmission lines, Oil pipelines and other fields that require long-distance and large-scale distributed monitoring. Most of the distributed optical fiber sensing technology is due to the fact that the geometric properties of the constructed optical fiber sensing network do not meet the requirements of the static structure, and it is difficult to obtain the strain analysis displacement from the measu...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/03
CPCG01B11/03
Inventor 胡威闻建中杨玺曾远景行
Owner GUANGDONG POWER GRID CO LTD