A cost-effective stereo camera-based system for measuring crack propagation in fibre-reinforced concrete

• Autorzy: Mena-Alonso, Álvaro , Latorre-Carmona, Pedro , González, Dorys C. , Díez-Pastor, José F. , Rodríguez, Juan J. , Mínguez, Jesús , Vincente, Miguel A.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

PL

propagacja pęknięć; beton zbrojony włóknem stalowym; oświetlenie LED

EN

3D stereo system; crack propagation; steel fibre-reinforced concrete; LED lights

• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2023
• Tom: Vol. 23, no. 3
• Strony: art. no. e192, 2023
• Opis fizyczny: Bibliogr. 32 poz., rys., wykr.

Twórcy

autor

Mena-Alonso, Álvaro

• Department of Civil Engineering, Universidad de Burgos, C. Villadiego s/n, 09001 Burgos, Spain

autor

Latorre-Carmona, Pedro

• Department of Computer Engineering, Universidad de Burgos, Avda. Cantabria s/n, 09006 Burgos, Spain

autor

González, Dorys C.

• Department of Civil Engineering, Universidad de Burgos, C. Villadiego s/n, 09001 Burgos, Spain,

autor

Díez-Pastor, José F.

• Department of Computer Engineering, Universidad de Burgos, Avda. Cantabria s/n, 09006 Burgos, Spain

autor

Rodríguez, Juan J.

• Department of Computer Engineering, Universidad de Burgos, Avda. Cantabria s/n, 09006 Burgos, Spain

autor

Mínguez, Jesús

• Department of Civil Engineering, Universidad de Burgos, C. Villadiego s/n, 09001 Burgos, Spain

autor

Vincente, Miguel A.

• Department of Civil Engineering, Universidad de Burgos, C. Villadiego s/n, 09001 Burgos, Spain

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024)

Identyfikatory

DOI

10.1007/s43452-023-00723-6