【摘要】 为实现超声平测法反射波起跳点的识别,采用两阶段法予以实现.通过分析声波的传播特性,应用数学分析方法排除表面波、横波的干扰,通过预估检测结构面的厚度,判断反射纵波到达的大致范围,结合波形分析,确定反射纵波的到达时间点.在此基础上,考虑到尺寸效应,在实验室模拟研究进行了验证.应用该方法可以较好的实现水泥混凝土板厚度的检测.更多还原

【Abstract】 In order to realize identification of takeoff of reflection wave,the paper adopted two-phase method to carry it out.Firstly,applying mathematical analysis method,disturbance of surface wave and transverse wave was obviated through analyzing ultrasonic propagation characteristic,then approximately scope of arrival of reflected p-wave was judged through pre-estimating the thickness of detecting structural plane,and arrival time of reflected p-wave was identified incorporating waveform analysis.On the basis of this study,in view of size effect,preliminary demonstration was proceeded in laboratory through simulator investigation,and effect is satisfied.Application of the method can be preferable to realize depth detection of cement concrete slabs.更多还原