Department of Civil and Environmental Engineering, Sejong University, Seoul 143-747, Korea.
Sensors (Basel). 2012;12(6):7326-36. doi: 10.3390/s120607326. Epub 2012 May 30.
In this paper, we propose a vision-based rotational angle measurement system for large-scale civil structures. Despite the fact that during the last decade several rotation angle measurement systems were introduced, they however often required complex and expensive equipment. Therefore, alternative effective solutions with high resolution are in great demand. The proposed system consists of commercial PCs, commercial camcorders, low-cost frame grabbers, and a wireless LAN router. The calculation of rotation angle is obtained by using image processing techniques with pre-measured calibration parameters. Several laboratory tests were conducted to verify the performance of the proposed system. Compared with the commercial rotation angle measurement, the results of the system showed very good agreement with an error of less than 1.0% in all test cases. Furthermore, several tests were conducted on the five-story modal testing tower with a hybrid mass damper to experimentally verify the feasibility of the proposed system.
在本文中，我们提出了一种基于视觉的大型民用结构旋转角度测量系统。尽管在过去十年中已经引入了几种旋转角度测量系统，但它们通常需要复杂和昂贵的设备。因此，具有高分辨率的替代有效解决方案有很大的需求。所提出的系统由商用 PC、商用摄像机、低成本图像采集卡和无线局域网路由器组成。旋转角度的计算是通过使用带有预测量校准参数的图像处理技术获得的。进行了多项实验室测试以验证所提出系统的性能。与商用旋转角度测量系统相比，该系统的结果在所有测试案例中都表现出非常好的一致性，误差小于 1.0%。此外，还对带有混合质量阻尼器的五层模态测试塔进行了多次测试，以实验验证所提出系统的可行性。
