Use of a Depth Camera as a Contactless Displacement Field Sensor

During experimental tests, optical displacement measures can provide reliable data about the behavior of structural elements without altering key parameters, such as damping, stiffness, or mass, with low cost and high spatial density of measurements. Motion capture Systems are used in different application from medicine to cinematography, involving different types of image processing techniques, but its application to measure the response of civil structures is costly and of limited value in terms of real implementations. Range/Depth Cameras, on the other hand, can provide a 3-D imaging Solution to capture motion and displacements at an affordable cost. These cameras are widely available and used in the videogames industry. This paper presents the first steps for the implementation of a large-displacement measurement methodology and its application.

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