Surface steel nail type steel sleeve packed optical fiber raster strain sensor and method the same

A strain sensor and fiber grating technology, which is applied in the field of road intelligent monitoring, can solve the problem that fiber grating sensors cannot co-deform with asphalt concrete, and achieve the effects of excellent mechanical properties, long service period and low shrinkage.

Inactive Publication Date: 2014-04-23
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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Problems solved by technology

[0003] In order to overcome the problem that the existing fiber grating sensor cannot cooperate with asphalt concrete to deform, the present invention provides a fiber grating sensor with good cooperative deformation ability with asphalt concrete, and its structure can be adjusted according to the type of asphalt concrete material used on the road surface

Method used

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  • Surface steel nail type steel sleeve packed optical fiber raster strain sensor and method the same
  • Surface steel nail type steel sleeve packed optical fiber raster strain sensor and method the same
  • Surface steel nail type steel sleeve packed optical fiber raster strain sensor and method the same

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Embodiment 1

[0032] Embodiment 1, a surface steel nail type steel sleeve packaged fiber grating strain sensor and its preparation method.

[0033] Make a sensor for the SMA13 asphalt mix type. like figure 1 , figure 2 , image 3 , there is a bare fiber 1, the pigtail part of the bare fiber 1 except the grating segment is sheathed in the white sleeve 2, the white sleeve 2 is sheathed into the armored cable 3, and the preliminarily encapsulated optical fiber is sheathed in the steel sleeve 4, the steel sleeve 4. Steel nails 5 are welded on the surface, and end expansion heads 6 are provided at both ends. The gap between the armored cable 2 and the steel sleeve 4 is injected with an epoxy resin adhesive 7 with a syringe 12, and a plug 8 is used at both ends of the steel sleeve 4. seal.

[0034] In the process of sensor packaging, when pouring epoxy resin adhesive, an iron frame 9 is needed. The sensor is fixed by the sensor fixing clip 10 on the iron frame 9, and the optical fiber of th...

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Abstract

A surface steel nail type steel sleeve packed optical fiber raster strain sensor and method the same comprises a bare optical fiber and a packed material, and is characterized in that the tail of the bare optical fiber is provided with a sleeve; the sleeve is arranged in an armoured cable; the outside of the armoured cable is provided with the steel sleeve; two ends of the steel sleeve are respectively provided with an end part expanding head; the surface of the steel sleeve is welded with a plurality of steel nails. The intensity of the sensor can meet the condition of long road engineering service period, severe service environment and the like, making a sensor and a pavement to reach the best cooperative transformation effect, thereby reducing the measuring error caused by difference module of the sensor and the pavement. The surface is welded with the steel nail and two ends are provided with the expanding head form the packed steel sleeve, on the foundation of the sensor adapted to the severe use condition of the road, according to the asphalt pavement material type, the size and the pitch of the sensor surface steel nail can be adjusted, thereby achieveing the best cooperative deformation effect between the sensor and the asphalt concrete.

Description

technical field [0001] The invention relates to the technical field of road intelligent monitoring, in particular to a fiber grating strain sensor packaged with a surface steel nail type steel sleeve, and also relates to a preparation method of the fiber grating strain sensor. Background technique [0002] Because of its simple structure, good reliability, corrosion resistance, strong anti-electromagnetic interference ability, strong multiplexing ability, good stability, high precision and other advantages, fiber grating sensor overcomes the inability of traditional sensors to adapt to the long service period of the road and the harsh service environment. And other shortcomings, has become a hot spot in engineering applications. However, the application of fiber grating sensors to monitor the internal strain of the pavement structure to evaluate the performance of the pavement structure is a difficult point in road engineering. This is due to the difference between the modu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/16
Inventor 解建光胡叶耿飞王亚军余健晖
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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