High-precision visual deflection monitoring system

Abstract

The invention relates to a high-precision visual deflection monitoring system, which comprises an infrared target, an integrated data acquisition instrument and a background processing assembly. The infrared target is arranged on the surface of a to-be-monitored structure, and performs vertical displacement, horizontal displacement and inclination angle along with the surface of the structure; the infrared target is provided with infrared light-emitting elements which are distributed in an array mode, the outer light-emitting element array can achieve light-emitting distribution of a specific number and a specific arrangement mode, and therefore information coding is achieved. And the integrated data acquisition instrument is arranged on the to-be-monitored structure or near the to-be-monitored structure and is used for shooting the light-emitting distribution image on the infrared target. Compared with the prior art, the structural displacement monitoring system based on the computer vision technology and the infrared sensing can achieve high-precision and high-frequency structural displacement response monitoring.

Description

technical field [0001] The invention relates to a structural health monitoring system, in particular to a high-precision visual deflection monitoring system. Background technique [0002] The health monitoring of structures has always been a concern of the engineering community. The monitoring of deflection and inclination is always the most basic and important part of structural health monitoring. A deflection detection and monitoring system with higher precision, higher frequency, and higher robustness is always the goal pursued by the engineering community. [0003] In the process of structural health monitoring, taking the health monitoring of bridges as an example, most of the traditional bridge deflection measurements are directly measured by dial gauges or displacement meters, which are still widely used in bridge maintenance, old bridge safety assessment or new bridge acceptance in my country . The advantage of this method is that the equipment is simple, multi-poin...

AI Technical Summary

Problems solved by technology

However, there are many deficiencies in the direct measurement method. This method needs to draw steel wires or set up frames at each measuring point, so it cannot be directly measured when there is water under the bridge; It cannot be used; high bridges across canyons and the like cannot be measured by direct methods; in addition, the deflection measurement by direct methods is complicated and takes a long time no matter whether the instrument is laid or withdrawn

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