High-precision tunnel slab staggering positioning system and method based on low-coherence interference technology

A low-coherence interference and positioning system technology, applied in the field of monitoring shield tunnel misalignment, can solve problems such as the method of interferometric optical fiber sensing technology that has not yet been found, and the lack of mention of optical fiber sensors.

Active Publication Date: 2020-05-12
SHENZHEN UNIV
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Problems solved by technology

[0007] Patent Publication No. CN105089702A discloses a system and method for large-scale and high-precision online monitoring of shield tunnel misalignment. Although the system is simple in structure and low in cost, the technology based on the patent is Brillouin technology; the patent disclosure No. CN110044268A describes the shield tunnel seam opening and stagger monitoring system based on the principle of optical fiber reflection, which

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  • High-precision tunnel slab staggering positioning system and method based on low-coherence interference technology
  • High-precision tunnel slab staggering positioning system and method based on low-coherence interference technology
  • High-precision tunnel slab staggering positioning system and method based on low-coherence interference technology

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Embodiment Construction

[0082] The application will be described in further detail below in conjunction with the accompanying drawings.

[0083] figure 1 A perspective view of a high-precision tunnel misalignment positioning system is shown.

[0084] Such as figure 1 As shown, the staggered positioning system includes a broadband light source, a first optical fiber cable, a second optical fiber cable, a third optical fiber cable, a first coupler, a second coupler, three LCI displacement meters, an optical mobile scanning platform, and an end cut Optical fiber, signal acquisition and processing system, wherein each of the three LCI displacement gauges includes an LCI fiber optic sensor, the optical fiber connected to the LCI displacement gauge is connected to the signal arm of the LCI fiber optic sensor, and the signal arm is provided with a first coupling and further connected to the broadband light source via the first optical fiber cable, the reference arm of the LCI optical fiber sensor is conne...

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Abstract

The invention aims to provide a high-precision tunnel slab staggering positioning system and method based on a low-coherence interference technology. The system comprises a broadband light source, a first optical fiber cable, a second optical fiber cable, a third optical fiber cable, a first coupler, a second coupler, three LCI displacement meters, an optical mobile scanning platform, an optical fiber with a flat tail end, and a signal collection and processing system. According to the invention, the 3D printing technology and the Michelson low-coherence interference technology are combined; the sensor has the advantages of convenience, quickness, low cost, improvement of the monitoring stability of the sensor and the like of a 3D printing manufacturing technology, also has the advantagesof high precision, strong electromagnetic interference resistance and suitability for long-term monitoring of tunnels of a low-coherence interference technology, and can be applied to engineering practical situations.

Description

technical field [0001] This application relates to the technical field of monitoring shield tunnel misalignment, in particular to a high-precision tunnel misalignment positioning system and method based on Low-coherence Interferometry (LCI) technology. Background technique [0002] As an emerging technology of rapid prototyping, 3D printing technology has developed rapidly in recent years. Its basic idea is: based on digital model files, using bondable materials, through layer-by-layer processing and layer-by-layer superposition molding way to get 3D solids. [0003] As the construction of shield tunnels has gradually become the main construction form of subway, underwater and other traffic tunnels, the lining ring is mainly assembled from prefabricated segments, and the segments are connected by bolts. The bending rigidity of the segment is different from that of the segment, and the relative displacement of the joint may occur due to uneven stress on the segment, resultin...

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Application Information

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IPC IPC(8): G01B11/02
CPCG01B11/02
Inventor 付艳斌洪成雨李云鹏陈湘生
Owner SHENZHEN UNIV
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