A portable digital detection technique of building surface crack

Bo Zhang; Lifang Lai; Guiying Yu; Tiantai Guo

doi:10.1117/12.900242

8 September 2011 A portable digital detection technique of building surface crack

Bo Zhang, Lifang Lai, Guiying Yu, Tiantai Guo

Proceedings Volume 8191, International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies; 819110 (2011) https://doi.org/10.1117/12.900242
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

Crack detection is important in safety assessment of buildings. However, for the present there is still no crack detection equipment available which can encompass both short-distance and long-distance examination functions. In view of existing problems, this paper develops a portable digital building surface crack detector integrating short-distance and long-distance examination functions. The crack detector can acquire images of building surface cracks and transmit the images through USB interface to computer for postprocessing. It has the functions of image acquisition, image storage, image processing and results display. Some experiments are performed at different distances and the measured results are calibrated with standard elements. The experiments show that the minimum resolution of the detector is better than 0.01mm, and the measurement accuracy is better than 0.02mm when surveying cracks at a distance shorter than 2m. When surveying cracks at a distance of 2 ~ 100m, both the minimum resolution and the measurement accuracy of the detector are better than 0.5mm.

Citation Download Citation

Bo Zhang, Lifang Lai, Guiying Yu, and Tiantai Guo "A portable digital detection technique of building surface crack", Proc. SPIE 8191, International Symposium on Photoelectronic Detection and Imaging 2011: Sensor and Micromachined Optical Device Technologies, 819110 (8 September 2011); https://doi.org/10.1117/12.900242

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