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Multi-dimensional and multidirectional stress-strain monitoring system

A stress-strain and monitoring system technology, applied in measurement devices, instruments, etc., can solve the problems of spatial multi-dimensional and multi-directional stress-strain distributed optical fiber monitoring without public research results, and achieve a complete and novel design concept, high precision, and low monitoring costs. Effect

Active Publication Date: 2014-02-12
HOHAI UNIV
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Problems solved by technology

PPP-BOTDA distributed optical fiber sensing technology has some mature applications in the deformation monitoring of pile foundations, oil wells, composite materials and prestressed beams, but the spatial multi-dimensional and multi-directional stress-strain distributed optical fiber monitoring based on PPP-BOTDA technology is currently There is no published research result yet, and its systematic realization and research is even a blank

Method used

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  • Multi-dimensional and multidirectional stress-strain monitoring system
  • Multi-dimensional and multidirectional stress-strain monitoring system
  • Multi-dimensional and multidirectional stress-strain monitoring system

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Embodiment 1

[0029] Embodiment 1: In this embodiment, the spatial two-dimensional three-way stress strain gauge is used as one of the preferred examples of the optical fiber monitoring device, so as to emphasize the authenticity, feasibility and inventive concept of the present invention. The following takes the SMF-28e ordinary single-mode fiber as an example to illustrate the specific use scheme of the monitoring system, but the use of the system is not limited to this.

[0030] (1) Building the system of the present invention

[0031] (1) Construction of the system device of the present invention

[0032] Multi-dimensional and multi-directional stress-strain monitoring systems, such as figure 1 As shown, it includes an information acquisition device 1, an optical fiber monitoring device 2, a data analysis platform 3, a junction box 4, and an optical fiber sensing device 5 arranged in the structure to be measured 6; the optical fiber sensing device 5 is used to sense the stress and st...

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Abstract

The invention discloses a multi-dimensional and multidirectional stress-strain monitoring system. The multi-dimensional and multidirectional stress-strain monitoring system is characterized in that the multi-dimensional and multidirectional stress-strain monitoring system comprises an information collection device (1), an optical fiber monitoring device (2), a data analysis platform (3), a wire collection box (4) and an optical fiber sensing device (5) arranged in a structural body (6) to be monitored, the optical fiber sensing device (5) is used for sensing stress-strain information which is produced by the structural body (6) to be monitored under the action of external factors, the optical fiber monitoring device (2) is connected with the optical fiber sensing device (5) through the wire collection box (4) and conducts distributed type high-precision monitoring on the structural body (6) to be monitored, the information collection device (1) is connected with the optical fiber monitoring device (2) and used for capturing and storing optical fiber monitoring data and digitizing and visualizing monitoring information, and the data analysis platform (3) is connected with the information collection device (1) and used for providing the data preparation function, the graph viewing function, the data basic analysis function and the stress calculation function for a user. The system has extremely strong operability and strong realizability in practical use.

Description

technical field [0001] The invention relates to a multi-dimensional and multi-directional stress-strain monitoring system based on PPP-BOTDA technology, which belongs to the application of optical fiber sensing technology in the field of structural health monitoring. Background technique [0002] In 1864, the dam of the Sheffield Reservoir in the United Kingdom burst, causing 254 deaths; in 1907, the Quebec Bridge in Canada suddenly collapsed, killing 74 people; in 2000, a natural gas pipeline in Carlsbad, California, leaked and exploded, killing 12 people. A large number of cases have shown that major water conservancy and civil engineering are inevitably affected by material performance degradation and adverse environmental loads during the ultra-long service period, which can easily lead to abnormal service behavior of engineering structures. Some catastrophic events may occur. In China, with the construction of a large number of civil and military projects, the signific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02
Inventor 苏怀智杨孟李皓杨迁
Owner HOHAI UNIV
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