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Foundation pit support top deformation monitoring system and method based on vision measurement

A foundation pit enclosure and visual measurement technology, which is applied to closed-circuit television systems, color TV parts, TV system parts, etc., can solve problems such as long operation time, low monitoring frequency, and inability to reflect foundation pit deformation in time , to achieve the effect of reducing the difficulty of monitoring, reducing environmental factors, and reliable data

Pending Publication Date: 2022-03-01
SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
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Problems solved by technology

Among them, manual monitoring cannot reflect the deformation of the foundation pit in time due to the long working time and low monitoring frequency; while the automatic monitoring of the total station, the stability of the station and the visibility conditions are easily affected, and are affected by the on-site temperature, humidity, Due to the influence of vibration and other factors, the test accuracy cannot meet the requirements of high-precision deformation

Method used

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  • Foundation pit support top deformation monitoring system and method based on vision measurement
  • Foundation pit support top deformation monitoring system and method based on vision measurement
  • Foundation pit support top deformation monitoring system and method based on vision measurement

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Embodiment 2

[0075] Such as image 3 As shown, two double-sided light targets are set between the two camera groups as the public monitoring point P 1 , P 2 , assuming that the displacement variation of the two points in the local coordinate system 2 calculated by the camera 2 in the test camera group 1 is The displacement variation of the two points in the local coordinate system 4 calculated by the camera 3 in the test camera group 2 is Compare the displacement changes of each public measuring point in the same local coordinate system. For example, if the displacements in local coordinate system 4 are converted to local coordinate system 2, the two-point displacement calculated by camera 2 and camera 3 can be obtained The delta difference, set to If the average value of the difference between the two displacement changes does not exceed the preset allowable value which is:

[0076]

[0077] Then the correction value of each measuring point collected by camera 2 is Will ...

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Abstract

The invention discloses a foundation pit support top deformation monitoring system based on visual measurement and a method thereof, which solve the defects that the data acquisition precision is affected by many factors and the field implementation difficulty is high in the traditional method, and are characterized in that a test camera group is installed outside a foundation pit, and a lamp target is arranged outside the foundation pit deformation influence range as a reference point; a lamp target is arranged at the corresponding position of the top of a foundation pit support to serve as a monitoring point, a wireless module remotely controls a test camera set and the lamp target to start and work at the same time, an image of the lamp target is obtained, and pixel coordinates of the center of a light circle of the lamp target are obtained through a coordinate resolving module; according to the foundation pit support top deformation monitoring system based on visual measurement and the method thereof, deformation data can be collected and fed back in real time, the installation is simple and convenient, and the testing precision is high.

Description

technical field [0001] The invention relates to geotechnical engineering deformation monitoring technology, in particular to a visual measurement-based deformation monitoring system and method for the top of foundation pit enclosure. Background technique [0002] During the construction of the foundation pit project, the top deformation of the enclosure structure (including horizontal and vertical displacement) is one of the important monitoring items to prevent engineering risks. The existing monitoring methods include manual monitoring and total station automatic monitoring. Among them, manual monitoring cannot reflect the deformation of the foundation pit in time due to the long working time and low monitoring frequency; while the automatic monitoring of the total station, the stability of the station and the visibility conditions are easily affected, and are affected by the on-site temperature, humidity, Due to the influence of vibration and other factors, the test accur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D33/00H04N5/232H04N7/18
CPCE02D33/00H04N7/18H04N23/695
Inventor 陈卫南苏辉褚伟洪张金凤戴加东梅志强朱以鹏
Owner SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
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