A computer vision-based vibration measurement method for wind tunnel tests of high-rise buildings

作者：Huang, Mingfeng^*; Zhang, Baiyan; Lou, Wenjuan

来源：Journal of Wind Engineering and Industrial Aerodynamics, 2018, 182: 222-234.

DOI：10.1016/j.jweia.2018.09.022

• VVM method
• Computer vision
• Template-comer algorithm
• Wind tunnel test
• Aeroelastic model
• High-rise building

This paper presents a computer vision-based vibration measurement (VVM) method for wind tunnel tests of typical aeroelastic high-rise building models. After reviewing the existing vision-based measurement techniques, an advanced object-tracking algorithm, so called the template-corner algorithm, is developed to achieve more accurate vibration measurements in wind tunnel setups. Based on the newly developed object-tracking algorithm, the proposed VVM method can measure wind-induced dynamic displacements and acceleration responses, as well as identify dynamic model characteristics. The method is cost effective and can acquire all horizontal responses at the top plane of the building model under various wind angle conditions using only one complementary metal-oxide-semiconductor (CMOS) camera, with significant flexibility and adequate resolutions. A free vibration test and a series of wind tunnel tests for a typical aeroelastic high-rise building model were conducted to validate the proposed vision-based method. The results obtained from the proposed method were carefully compared with those from conventional measurement techniques using a laser displacement sensor and an accelerometer. The comparison results confirm the accuracy and feasibility of the VVM method for obtaining wind-induced dynamic responses of aeroelastic tall building models.

• 出版日期2018-11
• 单位浙江大学