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Non-contact underground pipeline two-dimensional millimeter-level settlement real-time monitoring method

An underground pipeline, real-time monitoring technology, applied in the direction of climate sustainability, instruments, height/level measurement, etc., can solve the problems of monitoring data distortion, inability to real-time monitoring, low measurement accuracy, etc., to achieve low cost and high stability. , The effect of high monitoring accuracy

Pending Publication Date: 2022-06-07
河南省科学院同位素研究所有限责任公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the direct method usually needs to excavate the ground, find out the buried pipeline, fix the observation mark on the pipeline, and then monitor, which usually has the disadvantages of large amount of engineering and high cost, while some pipelines with low cost and easy installation The settlement monitoring device cannot monitor in real time, and the measurement accuracy is low, especially the phenomenon that the monitoring data is distorted

Method used

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  • Non-contact underground pipeline two-dimensional millimeter-level settlement real-time monitoring method
  • Non-contact underground pipeline two-dimensional millimeter-level settlement real-time monitoring method
  • Non-contact underground pipeline two-dimensional millimeter-level settlement real-time monitoring method

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Effect test

Embodiment 1

[0059] refer to figure 1 , The non-contact underground pipeline two-dimensional millimeter-level settlement real-time monitoring system includes sensor array probes, connecting rods 3, underground sound velocity vertical distribution real-time monitoring devices, base 1, wireless transmission and monitoring terminals. The sensor array probe is used as the main detection unit, including three ultrasonic ranging sensors (41, 42, 43), one acceleration sensor 6 and one inclination sensor 5. The sensing surfaces of the three ultrasonic ranging sensors face downward. The first ultrasonic ranging sensor 41 obtains the distance between the probe and the underground pipeline in the vertical direction in real time, and ΔD1i is the settlement value of the underground pipeline in the vertical direction; the monitoring terminal includes a foreign object extrusion and intrusion identification module, surface vibration correction module and tilt correction module.

[0060] The second ultras...

Embodiment 2

[0075] refer to figure 2 , the underground sound velocity vertical distribution real-time monitoring device, divided into left and right parts, the right side is installed a series of high-precision ultrasonic ranging sensors 71 at different heights from top to bottom to form an array sensor, the left is an ultrasonic reflection plate 72, ultrasonic reflection plate The distance L between 72 and the array sensor is a fixed value.

[0076] Dig a vertical hole in the roadside, flower bed and other places where holes are easy to be opened, put the device into the soil, adjust the ultrasonic reflector 72 and the array sensor to the vertical direction, fill the soil, and compact.

[0077] V=2L / T, T is the ultrasonic round-trip time, which is measured by each ultrasonic sensor, and then the real-time propagation rate of ultrasonic waves at different depths can be calculated.

[0078] The real-time corresponding function of velocity V and depth is obtained: y=V(x).

[0079] The re...

Embodiment 3

[0084] Embodiment 3 Simultaneous monitoring method for horizontal displacement and vertical displacement of pipeline

[0085] 3.1 Displacement algorithm when only vertical settlement

[0086] Horizontal displacement: △x=0;

[0087] Vertical displacement: △D i =D Ai -D Ao =D Bi -D Bo =D Ci -D Co .

[0088] A, B and C are the positions where the ultrasonic waves emitted by the three sensors (the first, second and third ultrasonic ranging sensors 41, 42 and 43) hit the underground pipeline respectively, D Ao , D Bo , D Co They are the vertical distances between the three sensors and A, B, and C after the equipment has just been debugged, D Ai , D Bi , D Ci are the vertical distances between the three sensors and A, B, and C, which are monitored in real time during the monitoring process.

[0089] 3.2 The necessity of horizontal displacement monitoring

[0090] Necessity of monitoring: (1) During the settlement process of the pipeline, a small amount of horizontal d...

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Abstract

The invention discloses a real-time monitoring method for two-dimensional millimeter-level settlement of a non-contact underground pipeline. The method comprises the following steps: step (1), acquiring the distance between a probe and the underground pipeline in the vertical direction in real time by a first ultrasonic distance measuring sensor; (2) calculating a settlement value of the underground pipeline in the vertical direction, and inverting a horizontal displacement value of the underground pipeline; (3) correcting the monitoring data in real time by a ground surface vibration correction module, and eliminating the influence of vibration on a monitoring result; step (4), a tilt correction module performs data correction on the monitoring result by using the tilt value of the horizontal plane of the probe; the system has a function of monitoring settlement of the underground pipeline in real time, and has the advantages of non-contact monitoring, high monitoring precision, simultaneous monitoring of displacement changes in vertical and horizontal directions, simple system device and installation process, high stability, good environmental adaptability, low later maintenance requirement, small hole, low cost, easy popularization and the like.

Description

technical field [0001] The invention relates to the technical field of underground pipeline monitoring, in particular to a real-time monitoring method for non-contact two-dimensional millimeter-level settlement of underground pipelines. Background technique [0002] Underground pipelines are an important part of urban facilities. Engineering construction, foundation pit excavation and building construction will cause displacement and settlement deformation of underground pipelines. They will have a significant impact on the normal transmission, operation safety and life of pipelines, and sometimes even will directly endanger the lives of residents. Therefore, it is particularly important to monitor the settlement of buried pipelines in real time with high precision. The underground pipeline monitoring method is divided into direct method and indirect method. The direct method usually has higher measurement precision and accuracy. However, the direct method usually needs to...

Claims

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Application Information

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IPC IPC(8): G01C5/00G01B17/00
CPCG01C5/00G01B17/00Y02A90/30
Inventor 李向辉杨小卫李灿然遆永周程可男苑素华朱玉坤董明静
Owner 河南省科学院同位素研究所有限责任公司
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