RT info:eu-repo/semantics/article
T1 A cost-effective stereo camera-based system for measuring crack propagation in fibre-reinforced concrete
A1 Mena Alonso, Álvaro
A1 Latorre Carmona, Pedro
A1 González Cabrera, Dorys Carmen
A1 Diez Pastor, José Francisco
A1 Rodríguez Diez, Juan José
A1 Mínguez Algarra, Jesús
A1 Vicente Cabrera, Miguel Ángel
K1 3D stereo system
K1 Crack propagation
K1 Steel fibre-reinforced concrete
K1 LED lights
K1 Ingeniería civil
K1 Civil engineering
K1 Tecnología
K1 Technology
K1 Materiales de construcción
K1 Building materials
K1 Ingeniería mecánica
K1 Mechanical engineering
AB This paper shows a new low-cost technology for the measurement of crack propagation in quasi-fragile materials based on a stereo pair of cameras and LED light spots. The two cameras record the displacement experienced by a series of LED white lights. For each frame, the X, Y and Z 3D coordinates of all the centroids of the LED points are obtained. From this information, it is possible to determine the variation of the distance between any two of them. In this case, 2 strips of 12 LED lights each were arranged in such a way that the points of both strips coincided in pairs in height. The algorithm made it possible to monitor the increase in distance that occurred between each pair of lights at the same height. The paper shows the mathematical basis of this technological solution. A test has been carried out by installing this system in a concrete cube 150 mm side and subjected to a wedge-splitting test. The results show that it is possible to monitor the crack propagation (position of the crack front) during the test and to know the crack width too. At present, the accuracy of this technique is only limited by the camera resolution and the computer processing capability.
PB Springer Nature
SN 1644-9665
YR 2023
FD 2023-07-09
LK http://hdl.handle.net/10259/9252
UL http://hdl.handle.net/10259/9252
LA eng
NO Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. The authors are grateful for financial support from the Ministerio de Economía y Competitividad, Spain, with grant no. PID2019-110928RB-C32, the Ministerio de Ciencia e Innovación, project PID2020-119894GB-I0, and the Junta de Castilla y León project BU055P20; co-financed through European Union FEDER funds.
DS Repositorio Institucional de la Universidad de Burgos
RD 17-jul-2024