A quasi-distributed optical measurement method for structural displacement

Abstract

A quasi distributed structure displacement optical measurement method includes A, erecting a measuring device and preparing initial adjustment; B, marking image pixels and actual distances; C, manufacturing quasi distributed measuring point image templates and performing matching optimization; and D, measuring and storing quasi distributed structure displacement automatically.

Description

technical field [0001] The invention relates to optics, image processing technology and structural parameter identification technology, in particular to quasi-distributed dynamic displacement measurement of structures using a camera. Background technique [0002] Bridge deformation measurement is to track and identify the displacement of the bridge structure under test, so as to determine the change characteristics of its spatial position over time. Bridge deformation measurement uses engineering measurement principles, methods and precision measurement technology to measure the coordinates of bridge displacement control points, and draws the corresponding displacement and deformation effects by comparing the coordinates of bridge displacement control points obtained from each measurement and structural calculation and analysis Lines (surfaces), combined with basic structural indicators such as load and resistance, can macroscopically judge the safety performance of bridge s...

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Problems solved by technology

On the other hand, most of the current research focuses on short-distance displacement measurement, and there are relatively few studies on long-distance (beyond 1km) displacement measurement.

[0011] The above methods cannot be effectively and reliably used for quasi-distributed displacement measurement of structures due to their respective defects, and are also unstable for dynamic displacement measurement. For methods such as laser displacement measurement, GPS displacement measurement, and displacement measurement using camera photography, etc. In quasi-distributed displacement measurement, multiple displacement measurement devices need to be arranged, and the cost is relatively high

Moreover, what is commonly referred to as non-contact measurement at present, such as the above-mentioned three types, requires the installation of markers or specific signal emission sources at the target to be measured in advance, which will be difficult to achieve in some specific occasions, increasing the difficulty of measurement

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