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Structure monitoring system

一种监视系统、结构体的技术，应用在结构体监视系统领域，能够解决偏离光纤传感器、难以精确地测量变形、花费工夫等问题

Inactive Publication Date: 2006-07-12
NEUBREX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the above-mentioned structure monitoring system, since the optical fiber sensor is laid on the inner wall of the tunnel, although the deformation near the inner wall (surface) of the tunnel can be detected with high accuracy, it is difficult to measure the deformation of the inner wall. Deformation in the interior, especially at positions offset from the fiber optic sensor
[0006] Moreover, due to technical or cost reasons, the above-mentioned optical fiber sensors cannot be densely laid on the inner wall of the tunnel, because the optical fiber sensors are placed along the circumference of the tunnel at a specified distance in the axial direction of the tunnel. Therefore, even if there is deformation near the inner wall of the tunnel, it is difficult to accurately measure the deformation at the position where the optical fiber sensor is not laid
[0007] Therefore, in the above-mentioned existing structure monitoring system, even in the position inside the inner wall of the tunnel, or the position near the inner wall surface, it is still difficult to accurately detect the deformation at the position where the optical fiber sensor is not laid, for example, as As the deformation increases, when cracks occur inside the inner wall, only rough monitoring can be carried out. In order to specify the position and size of the crack, it is necessary to rush to the scene for precise re-inspection, so there is a disadvantage of time-consuming

Method used

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no. 1 Embodiment

[0052] figure 1 It is an overall configuration diagram showing the structure monitoring system of the first embodiment. This structure monitoring system 1 is used to monitor the distribution of deformation (physical quantity) of a disk S as a structure to be monitored. In addition, in this first embodiment, a two-dimensional elastic problem will be described.

[0053] Here, assuming a disc body S, at the boundary Γ described later 1 There is no surface force (hereinafter referred to as "traction"), and on the other hand, at the boundary Γ described later 2 Upward movement is constrained. In addition, this structure monitoring system 1 also monitors changes in deformation due to material deterioration.

[0054] The structure monitoring system 1 includes a measurement unit 3 having an optical fiber sensor 2, a control unit 4 electrically connected to the measurement unit 3 through a communication unit 6a, a display unit 6 electrically connected to the control unit 4 through ...

no. 2 Embodiment

[0128] Figure 7 (a) is an explanatory diagram showing objects monitored by the structure monitoring system of the second embodiment, Figure 7(b) is an enlarged schematic diagram of the internal crack of the monitoring object.

[0129] The structure monitoring system 1 of this second embodiment has the same basic structure as that of the first embodiment, but differs from the above-mentioned first embodiment in that when a crack C occurs in the disk S as the analysis object, The position and shape of the crack C can be specified in the numerical analysis unit 5 .

[0130] That is, the numerical analysis unit 5 of this second embodiment, in addition to the structure of the numerical analysis unit 5 of the above-mentioned first embodiment, can also form a kind of structure, so that to the disc body S that same measuring point is measured at different times The measured deformations are compared, and when the amount of change in the measured deformations exceeds a specified al...

no. 3 Embodiment

[0152] The structure monitoring system 1 of the third embodiment has the same basic structure as that of the second embodiment, but differs from the second embodiment in that the monitored object is not the deformation distribution but the temperature distribution, and the recognized object is not It is a crack, and it is an abnormally high temperature part. Furthermore, the shape of the structure S is also different. The structure S such as Figure 9 As shown, it is composed of a circular cylindrical body, and the inside thereof is filled with a high-temperature fluid, and the inner wall may be damaged or missing due to the high-temperature fluid. Therefore, the structure monitoring system 1 of the third embodiment monitors the wall thickness of the cylindrical body as the structure S based on the temperature distribution of the cylindrical body.

[0153] The measurement unit 3 has the same basic structure as that of the above-mentioned embodiments, but has the following st...

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Abstract

A structure monitor system comprising a measuring unit 3 for measuring distortions of the structure S at respective points on a boundary by using an optical fiber sensor 2 laid on the boundary of the structure, numerical analysis unit 5 for calculating a distortion at a specified point on the structure S by a numerical analysis method with distortions measured by the measuring unit as a boundary condition, and a display unit 6 for displaying information on an analysis distortion by the numerical analysis unit 5 in a association with a position on the structure S.

Description

technical field [0001] The invention relates to a structure monitoring system for measuring physical quantities such as temperature and deformation of the structure through an optical fiber sensor. Background technique [0002] In recent years, people have developed a structure monitoring system that uses a distributed optical fiber sensor that effectively uses the characteristics of optical fibers to measure the distribution of physical quantities such as temperature and deformation. It is used to measure and monitor tunnels, bridges, etc. , buildings and other structures of physical quantity changes. [0003] For example, Japanese Unexamined Patent Publication No. 11-287650 discloses a structure monitoring system. The structure monitoring system is based on the inner peripheral surface of the tunnel and is laid in a meandering shape along the depth direction of the tunnel. Distributed optical fiber sensor information to detect the deformation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/26G01B11/16G01K11/12G01D5/353G01M11/08
CPCG01B11/16G01M11/085G01D5/353G01D5/35364G01D5/36E21F17/185G01K7/427G01K11/32
Inventor 岸田欣增中野元博山内良昭
Owner NEUBREX