Application study of wavelet transform in construct detection of bridge
Pan Mao-gui · 2005
Wavelets is a developing subject. It provides a new toll employing digital signal processing in engineering. Vibration signal of bridge often have non-stationary and timely character. Traditional Fourier transform is a kind of whole transformation and short-time Fourier transform have the limitation that if short-time window is ascertained, its shape is also certain. But wavelet analysis method has higher and lower time solution at low frequency, have lower frequency solution and higher time solution. By its multi-solution idea, we can focalize discretionary detail of detection of bridge and process in time field and frequency field. So it is adapt to vibration detection of bridge.