Steel shelves are widely used in logistics and warehousing, however, steel shelves often occur instability and other accidents in applications. Many of the destruction are instantaneous. [ Therefore, how to timely monitor the deformation of the shelf, especially the deformation of the shelves on the dynamic stress in the moment to ensure the safe of the shelves is very important. This article describes the method of using digital cameras to monitor dynamic and instantaneous deformation of shelf, which has the characteristics that easy to use, high accuracy, rapid reaction, and observing multi-point once, all-weather use, does not affect the normal work.
For needs of transportation, it is more and more obvious of the bridge unsafe, and the study of bridge safety monitor will become more important at the area of civil engineering. In this paper we discuss the methods of digital ground photogrammetry for bridge safety monitoring and the application of those, we took digital cameras and 3-D laser scanners as the tools for close-range photogrammetry, and adopted 3D Time Baseline Parallax combined with Kalman Variance Filters as the theories for monitoring dynamic deformation, then developed software to deal with data, which can draw curves of dynamic deformation automatically, we can monitor the deformation regularity by these curves effectively, then we can monitor and analysis the safety of bridges by this way. The method we designed is very simple and economical, and we also did a lot of experiments to verify availability of this system, and we happy to say that the system has the characteristics of high automation degree, large data collection capacity and strong system reliability, etc. It will be practical value at the area of civil engineering.
The harm of bridge deformation is serious, real time monitoring of bridge deformation is important to ensure the safe use. Over the years, the routine measuring method is unable to complete the multiple, dynamic monitoring. This paper discusses the method of multi-points instantaneous monitoring by using GPS technology, makes a great contribution to improve the technology of bridge detection, and has achieved good results.
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