Method and system for monitoring deformation of two-dimensional surface based on microwave interference

Abstract

The invention provides a method and a system for monitoring deformation of a two-dimensional surface based on microwave interference. The method for monitoring the deformation comprises the followingsteps of S1, selecting stable reference points and target to-be-monitored points; S2, solving the deformation amount of each point; S3, compensating the error; S4, solving the horizontal displacementand vertical displacement; S5, monitoring the deformation. The system for monitoring the deformation comprises at least two microwave interference deformation measuring radars, n stable reference points, a plurality of target to-be-monitored points, a radar control system and a remote monitoring platform, wherein n is greater than or equal to 2; the radar control system comprises an error compensation module, a displacement calculation module and a deformation monitoring module. The system has the advantages that the system is suitable for monitoring the deformation of edge slops and dams; theinstallation is simple and convenient, the use cost is low, the automation degree and accuracy are high, the monitoring effect is good, the easiness by interference is avoided, and the deformation can be stably monitored by measuring the deformation components of the two-dimensional surface in the horizontal and vertical directions.

Description

technical field [0001] The invention relates to a two-dimensional surface deformation monitoring method and system, in particular to a microwave interference-based two-dimensional surface deformation monitoring method and system. Background technique [0002] In nature and daily life, deformation phenomena can be seen everywhere, and the amount of deformation an object can withstand has a certain range. When the amount of deformation exceeds the allowable range, catastrophic consequences may occur, such as excessive deformation causing Of: landslides, collapse of large bridges, skyscrapers, large dams, etc., all of which can lead to huge disasters. In order to avoid and reduce the loss of life and property when disasters occur, deformation monitoring is particularly important. [0003] Two-dimensional surface deformation monitoring takes slope monitoring as an example. After years of development, slope monitoring technology can be roughly divided into surface displacement, ...

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Problems solved by technology

Tension line method and GPS method are widely used. Tension line method has low cost and simple operation, but the degree of automation is not high, and the measurement accuracy is related to the selection of scale; high

(2) The monitoring methods of vertical deformation include geometric leveling method, static leveling method, triangular elevation method and multi-point displacement meter method. The monitoring requirements of some dams, but there is no way to achieve automation; the static leveling method has high precision but is easily affected by the environment

[0005] The IBIS-FM / FL series products of the Italian IDS company are also deformation measurement radar systems based on microwave interferometry technology. Based on the synthetic aperture imaging algorithm, radar hosts moving in a straight line and at a constant speed on high-precision slide rails form radar images at different times for the observation scene. image, and estimate the deformation in the scene through the phase change of the image sequence. This method has some limitations, such as: 1) the volume and weight are large, and the deployment is difficult; 2) rely on strong scattering points in the scene, and the measurement effect for the area with weak scattering Poor; 3) It is easily affected by surface vegetation and gravel; 4) It is impossible to measure the deformation components of two-dimensional surfaces such as dams in the horizontal and vertical directions

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