基于时间平均成像的结构振动测量

Structural Vibration Measurement Based on Time-Averaged Imaging

介绍了利用时间平均成像的简谐激励方法测量多自由度结构振动的原理。由于该方法只需用 CCD图像传感器分别摄取被测结构某点在静态和在简谐激励下的时间平均成像 ,即可得出在此频率下结构响应的振幅 ,因而在结构非接触测量领域中是一种具有较大发展潜力的测量方法。

In order to measure structural vibrations,a time-averaged imaging method based on harmonic excitations is presented in this paper. By aid of the CCD image sensor,both static and the time-averaged images under harmonic excitations can be acquired,and then the amplitudes of the vibration can be obtained from above images. The method has great potentialities in non-contact vibration measurement field. The validity of this method is verified by the experiment in this work.