Landslide monitoring sensor for simultaneously measuring internal and external displacement fields and application thereof

A technology for monitoring sensors and displacement fields, applied in the field of sensors, can solve problems such as data incompatibility, poor real-time displacement measurement data, and inability to achieve high-precision measurement of internal and external displacements.

Pending Publication Date: 2017-09-05
PLA UNIV OF SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

At present, there are two obvious defects: 1) continuous and uninterrupted high-precision measurement of internal and external displacement cannot be realized; 2) juxtaposition and co-location measur...

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  • Landslide monitoring sensor for simultaneously measuring internal and external displacement fields and application thereof
  • Landslide monitoring sensor for simultaneously measuring internal and external displacement fields and application thereof
  • Landslide monitoring sensor for simultaneously measuring internal and external displacement fields and application thereof

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Embodiment 1

[0080] This embodiment provides a landslide monitoring sensor that simultaneously measures internal and external displacement fields, such as figure 1 As shown, the sensor includes a PVC rod 1, a wireless ranging terminal 6 is installed at one end of the PVC rod 1, and a first optical fiber 2 and a second optical fiber are arranged on the side wall of the PVC rod 1 parallel to the extending direction of the rod. 3 and the third optical fiber 4, the first optical fiber 2, the second optical fiber 3 and the third optical fiber 4 are provided with a Bragg grating 5. Such as figure 2 As shown, the first optical fiber 2, the second optical fiber 3 and the third optical fiber 4 are evenly distributed on the cross section of the PVC rod 1, and the lines connecting the three optical fibers and the center point of the cross section form an included angle of 120°. The length of aforementioned PVC bar 1 is 2m. The inner diameter of the aforementioned PVC rod 1 is 30 mm, and the outer ...

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Abstract

The invention discloses a landslide monitoring sensor for simultaneously measuring internal and external displacement fields and application thereof. A wireless three-dimensional position measuring device for measuring surface displacement and an optical fiber grating sensing device for converting optical signals to displacement parameters are designed. The application comprises the following steps of: 1, the combination form and the structure of each component of the sensor, 2, the basic technical principle of measuring the internal displacement field by the sensor, 3, the basic technical principle of measuring the external displacement field by the sensor and 4, the sensor packaging method in engineering application. Thus, the internal displacement of the landslide body is calculated through acquiring changes of optical characteristics of a fiber Bragg grating sensor, the surface displacement of the landslide body is calculated through a three-dimensional position time sequence obtained and measured by an ultra wideband wireless positioning sensor, and through analyzing the surface displacement and the internal displacement, problems of landslide monitoring and early warning during processes of a natural landslide, a high slope, a deep foundation pit and the like are solved.

Description

technical field [0001] The invention belongs to the technical field of sensors, and relates to a landslide monitoring sensor for simultaneously measuring internal and external displacement fields and an application thereof. Background technique [0002] At present, the main content used for geotechnical engineering landslide monitoring includes surface displacement monitoring and internal displacement monitoring. Usually, different systems and sensors are used for the monitoring of the two. Among them, total station, GPS and other technologies are mostly used for surface displacement, and inclinometers are mostly used for internal displacement observation. At present, there are two obvious defects: 1) continuous and uninterrupted high-precision measurement of internal and external displacement cannot be realized; 2) juxtaposition and co-location measurement of internal and external systems and sensors cannot be realized. The above two defects have caused problems such as po...

Claims

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Application Information

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IPC IPC(8): G01B11/02
CPCG01B11/02
Inventor 张清华熊自明荣凤娟戎晓力王源马超卢浩孙阳阳章征林
Owner PLA UNIV OF SCI & TECH
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