采用一种新的自适应时频分析方法Hilbert-Huang变换来构造Hilbert谱及Hilbert能量谱,并将其应用在超声检测的回波信号处理中,通过仿真表明,Hilbert谱能够反映回波信号的时频信息,Hilbert能量谱能够反映回波信号的时间信息,从而有效地判断缺陷的有无及位置。并为以A型显示方式表示缺陷信息提供了依据。 A new adaptive time-frequency analysis method, Hilbert-Huang transform, was used to construct Hilbert spectrum and Hilbert energy spectrum. The Hilbert spectrum was applied to the echo signal processing of ultrasonic testing. The simulation results show that the Hilbert spectrum can reflect the echo signal Time-frequency information, Hilbert energy spectrum can reflect the echo signal time information, which effectively determine the presence and location of defects. And provide a basis for the A-type display of defect information.