Landslide monitoring system

A monitoring system and inclinometer technology, applied in measurement devices, instruments, optical devices, etc., can solve the problem of not solving the problem of effective protection of the sensing fiber sensitivity of the sensing fiber, not fully excavating and releasing the huge potential of fiber sensing, It is difficult to meet the long-term real-time monitoring requirements of landslides and other problems, so as to achieve the effect of promoting use, flexible use, and reducing labor intensity and danger

Inactive Publication Date: 2013-06-05
XIAN JINHE OPTICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional deep displacement monitoring of landslides mainly uses multi-point displacement meters and borehole inclinometers. These two methods are not easy to carry out long-distance detection and require manual on-site monitoring. The real-time performance is poor, and it is difficult to meet the long-term real-time monitoring requirements for landslides. Manual on-site monitoring also has great risks when it is in a critical state
Another method is to measure the deep displacement of the landslide by using the characteristic that the impedance characteristics of the coaxial cable will change with the cable deformation. Due to the relationship between the electromagnetic wave reflection signal caused by the impedance change of the coaxial cable and the cable deformation, there is no corresponding method. Theoretical basis, so the amount of deformation can only be calculated by the fitting formula of the indoor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0043] Example 1

[0044] Such as figure 1 , figure 2 , image 3 , Figure 4 The shown landslide monitoring system includes an inclinometer tube 12 inserted into the landslide. The inclinometer tube 12 passes through the potential sliding surface 15 of the landslide and extends into a borehole below the surface of the bedrock body 16. The tube 12 is continuously provided with a curved test channel for signal optical fiber to pass through, and the curved test channel includes a cylinder 36 and a plurality of A-side deforming teeth 4 continuously arranged on the upper and lower sides of the cylinder 36. -1 and a plurality of B-side deformed teeth 4-2, a plurality of A-side deformed teeth 4-1 and a plurality of B-side deformed teeth 4-2 are arranged in a staggered manner, and the heads of the two are formed for one or more The curved channel through which the signal fiber passes. The deforming teeth 4-1 on the A side and the deforming teeth 4-2 on the B side are correspondingly arr...

Example Embodiment

[0053] Example 2

[0054] Such as Figure 5 , Image 6 As shown, in this embodiment, the difference from embodiment 1 is: a light reflecting device 30 is arranged at the end of the signal fiber 34, and the light source-optical power meter 26 includes a 1×2 optical splitter 23, The transmission fiber 17 is connected to the input end of the 1×2 optical splitter 23, and the output end of the 1×2 optical splitter 23 is connected to the light source 24 and the optical power meter 25 respectively. The process is as follows: the optical signal from the light source 24 enters the signal optical fiber two 34 through the 1×2 optical splitter 23, the transmission fiber three 17, and the optical cable 1, and is returned by the light reflection device one 30 at the end of the signal fiber two 34, and After the optical cable 1, the transmission optical fiber three 17, and the 1×2 optical splitter 23 enter the optical power meter 25 to complete the test. In the whole process, the optical signal...

Example Embodiment

[0055] Example 3

[0056] Such as Figure 7 As shown, in this embodiment, the difference from the second embodiment is that a plurality of light reflecting devices 38 are arranged on the signal fiber 33, and the optical time domain reflectometer 18 can detect each light reflecting device 38. And calculate the difference between the reflected light power of two adjacent light reflecting devices 38 to obtain the bending condition between the positions of the two light reflecting devices 38, thereby obtaining the position and displacement of the deep part of the landslide. In this embodiment, the structure, connection relationship and working principle of the remaining parts are the same as those in the second embodiment.

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Abstract

The invention discloses a landslide monitoring system. The landslide monitoring system comprises an inclinometer pipe inserted into a landslide, a power supply system and a first wireless transceiver module, wherein the inclinometer pipe penetrates through a potential sliding surface of the landslide and extends into a drilling hole below a surface of a bed rock body; the inclinometer pipe is internally and continuously provided with curve-shaped testing channels allowing signal optical fibers to pass through; each curve-shaped testing channel comprises multiple A-side deformed teeth and multiple B-side deformed teeth; the testing unit comprises a light time domain reflectometer and a light source-light power meter; one end of a first signal optical fiber is connected to the light time domain reflectometer; a second signal optical fiber is connected to the light source-light power meter; the power supply system comprises a battery pack; and the first wireless transceiver module is wirelessly connected to a second wireless transceiver module. The landslide monitoring system has a simple structure, a rational design, convenience in processing and manufacturing, low cost, a flexible use way, high sensitivity, good use effects, a high practical value, strong adaptability, and capabilities of realizing long-distance monitoring and monitoring change of depth displacement of the landslide efficiently.

Description

technical field [0001] The invention relates to a landslide monitoring system. Background technique [0002] Landslide refers to the phenomenon that the soil and rock mass on the slope slides down the slope in whole or in part along a certain weak surface or belt under the action of gravity due to the influence of various factors. Landslide disaster is one of the most dangerous geological disasters. Due to the difference in geological conditions, there are many types and phenomena of landslides, which also creates a relatively high difficulty for the monitoring of landslides. The monitoring indicators of landslides include geological macroscopic trace monitoring indicators, ground displacement monitoring indicators, deep displacement monitoring indicators, inducing factors monitoring indicators, groundwater dynamic monitoring indicators and geophysical field monitoring indicators. Among them, the deep displacement monitoring can directly reflect the multi-layer deformation...

Claims

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Application Information

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IPC IPC(8): G01B11/02G01B11/22
Inventor 杜兵
Owner XIAN JINHE OPTICAL TECH
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