基于高速摄像技术的管系振动位移测量

针对试验中高速摄像技术在远距离测量振动响应精度较低的问题,提出结合双三次 插值法与Sobel算子边缘检测图像技术的方法,用其处理测得图像来提高测量精度。首先,设计了采 用高速摄像与加速度计两种测量系统的管系振动台试验。然后,对高速摄像系统测得的图像 与加速度计测得的加速度振动响应进行处理并提取位移振动响应数据。最后,从时域和频域 两个角度对比高速摄像与加速度计两种测量系统测得的位移振动响应数据,对高速摄像系统 测得数据的准确性进行分析。结果表明,结合双三次插值法与Sobel算子边缘检测图像处理 技术优化高速摄像技术测得的图像可以获得满足测量与使用要求的高精度位移振动响应数 据。

Vibration displacement measurement of pipe system based on high-speed photography technology

Aiming at the low precision of the problem of high-speed photography technology at a lo ngdistance measurement of the vibration response in the test,a method combining b icubic interpolation with Sobel operator edge detection image technology is proposed to improve the measurement precision.At first,the shaking table test of pipe system with two measuring systems,high-speed photography and accelerometer,is designed.Secondly,the i mage measured by the high-speed camera system and the acceleration vibration respons e measured by the accelerometer are processed,and the displacement vibration response data is extracted. Finally,the displacement vibration response data measured by high-speed photog raphy and accelerometer are compared in time domain and frequency domain,and analyzing th e accuracy of data measured by high-speed photography.The results show that the image mea sured by optimizing high-speed photography technology combined with bicubic interpolatio n and Sobel operator edge detection image processing can obtain high-precision displacement vibration response data to meet the measurement and use requirements.