国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

In process of measuring the line-shape of bridge structure by FOG based measurement system,as the line-shape is calculated by the integral algorithm, the vibration and shock from vehicle and rode surface can result in large measurement error. And the error will be accumulated with the increase of measurement time and distance, showing the characteristics of divergence. In order to reduce the influence from vibration and shock, obtaining location and traffic information through the data of time and speed with the means of time-frequency analysis, and then getting the frequency characteristics of different road conditions. Choosing a flat road with a dotted speed bump to complete the experiment, then finding different road conditions will bring in different frequency domain characteristics, also finding the signal above 27 Hz is noise by time-frequency analysis with Morlet Wavelet Transform. At last, taking a River Bridge as an example, processing FOG signal with Chebyshev low-pass filter to remove the noise signal higher than 27 Hz, and results show that the measurement precision have been improved by 50%.