Fiber grating type sensor

A fiber grating and sensor technology, applied in instruments, optical devices, measuring devices, etc., can solve the problems of limiting the radial size of the sensor, being easy to corrode, and reducing the spatial resolution of deep displacement monitoring.

Inactive Publication Date: 2017-04-26
CHINA SHENHUA ENERGY CO LTD +2
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Problems solved by technology

However, electronic sensors have problems such as poor sealing, easy leakage, easy corrosion, electromagnetic interference, and lightning strikes, and there are many problems in practical engineering applications.
[0003] The optical fiber sensor uses optical signals for sensing and transmission, and there is no problem with the above-mentioned electronic sensors. The existing optical fiber grating displacement sensor uses a spring insta...

Method used

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  • Fiber grating type sensor
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Embodiment Construction

[0023] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0024] In the present invention, in the absence of a contrary statement, the used orientation words such as "inner and outer" refer to figure 1 inside and outside of the sensor shown.

[0025] The present invention provides a sensor, which includes an optical fiber 3 provided with a fiber grating 4, a casing 1, and the fiber grating 4 arranged in the casing 1 for transmitting the deformation of the casing 1 to One end of the optical fiber 3 passes through the housing 1 . Set the shell 1 in the slope or roadbed to be monitored. When the slope or roadbed is deformed such as settlement, the shell 1 will be deformed by the force caused by the deformation of the so...

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Abstract

The invention relates to the fields of slope slip and roadbed settlement, and discloses a fiber grating type sensor. The sensor comprises the components of a fiber (3) which is provided with a fiber grating (4), a housing (1), and a transmission part which is arranged in the housing (1) and is used for transmitting deformation of the housing (1) to the fiber grating (4). One end of the fiber (3) penetrates through the housing (1). The fiber grating type sensor according to the invention can realize high-sensitivity monitoring on deep-part placement and furthermore realizes an advantage of compact structure.

Description

technical field [0001] The invention relates to the field of side slope slip and roadbed settlement monitoring, in particular to an optical fiber grating sensor. Background technique [0002] The foundation of buildings or the slopes and roadbeds of roads and railways will slowly settle over time, or deform during geological disasters, thus posing a threat to the buildings on the bottom. Therefore, the monitoring of slopes or subgrades is very important. At present, typical sensors for deep displacement monitoring include capacitive or eddy current displacement sensors. The displacement is measured by the electrical sensor and converted into an electrical signal input to the analysis equipment for calculation, and finally the deep slip is obtained. However, electronic sensors have problems such as poor sealing, easy leakage, easy corrosion, electromagnetic interference, and lightning strikes, and there are many problems in practical engineering applications. [0003] The o...

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Application Information

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IPC IPC(8): G01B11/16
CPCG01B11/18
Inventor 杜彦良孟宪洪孙宝臣赵维刚唐永康何占元张文涛许红彬李峰
Owner CHINA SHENHUA ENERGY CO LTD
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