JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2017, Vol. 47 ›› Issue (6): 46-51.doi: 10.6040/j.issn.1672-3961.0.2016.479

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Application of digital close-range photogrammetry in the deformation observation of check gate

ZHANG Guojian1, YU Chengxin2*, GUO Guangli1   

  1. 1. School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China;
    2. Business School, Shandong Jianzhu University, Jinan 250101, Shandong, China
  • Received:2016-12-21 Online:2017-12-20 Published:2016-12-21

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Abstract: The digital photography technology was used to complete the transient deformation observation of the check gate during gate lift to grasp the whole information of check gate in time and provide data support for evaluating check gate. The external data acquisition equipment—the digital camera was used to take a picture as a zero photo before the gate rising. Photos were taken as subsequent photos in the process of gate lift. The changed pixel value of the same name point was obtained by comparing the subsequent photos with the zero photo. Based on baseline data of the reference point, the actual displacement value was obtained by using the spatial time baseline parallax method, and deformation trend diagram was drawn. Results showed that the relative measurement accuracy of digital photography was 3/1 000, which could meet the requirements of deformation monitoring. According to deformation trend diagram, each deformation point moved consistently with each other, and no local instability occurred. Hongyuan check gate was within elastic deformation. The maximum deformation was less than 5.5 mm, the deformation was within safe levels. This study was a ful supplement for the current real-time safety monitoring of hydraulic engineering structure, which could promote the development of safety monitoring of engineering structure in the future.

Key words: digital photography technology, dynamic deformation, instant-aneous observation, deformation trend, check gate, non-metric digital camera

CLC Number: 

  • P234.1
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