基于小波分析的公路平整度测量研究

Research on highway flatness measurement based on wavelet analysis

为了实现公路路面平整度测量,采用磁悬浮振动测量方法,利用汽车在行驶过程中的振动实现路面平整度的测量。设计了双磁悬浮振子的磁悬浮测量模型。通过实验数据获得了磁悬浮振子的受力关系式,建立了磁悬浮振子的运动方程和磁悬浮测量系统的仿真模型。利用设计的测量模型分别测量了平坦路面、窄减速带、宽减速带、市区路面和长距离行驶过程中的振动信号。利用小波分析方法对测得的振动信号进行5层小波分解,得到逼近信号和细节信号,并对测量波形进行了小波重构。获得了5种不同情况下的路面特征。该方法对公路平整度检测方法提供了新的思路。

In order to achieve the road surface flatness measurement,the magnetic levitation technology was used to measure the vibration of the car during driving to achieve road surface flatness measurement.A magnetic levitation measurement model of double magnetic suspension oscillator was designed.The force relationship of the magnetic levitation oscillator was obtained by experimental data,and the equation of motion of the magnetic levitation oscillator was established.A simulation model of the magnetic levitation measurement system was established.A flat roads,narrow speed bumps,wide speed bumps,urban roads and long-distance travel measurements were measured using the designed measurement model.The wavelet analysis method is used to perform 5 layers of wavelet decomposition on the measured vibration signals to obtain approximating signals and detail signals and wavelet reconstruction of the measured waveform.Road features were obtained in five different situations.This method provides a new idea for the road flatness detection method.