In many structures, most of the destruction and damage are caused by torsion. At the same time, in many cases, the torsion effect plays a controlling role in architectural design. Therefore, the monitoring of structural torsion has become more and more important, but there is less research at present. Based on machine vision technology, this paper proposes a monitoring method for the torsional deformation of building structure. Firstly, the theoretical basis of the scheme and the composition of the monitoring system are introduced. Then the feasibility of the scheme is proved through free rotation and elastic torsion experiments. It is verified that the scheme has the advantages of high precision and low cost, and can realize the real-time monitoring of structural torsional deformation, It can avoid the large deformation of the structure due to torsion, affect the use and even damage, and make a certain contribution to the safety evaluation and health evaluation of the structure.
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