混凝土路面厚度的超声波无损检测研究

Detection for thickness of concrete highway surface using ultrasonic non-damaging probe technique

利用模拟物理模型,并根据相似性原则建立起公路路面和路基的双层简化模型,提出了一种准确识别反射波,测量反射波速率及走时参量的实用方法。采用特殊的观测系统,由波速及走时反推路面厚度。实验结果表明,这种无损检测方法具有较高的精度,相对误差不超过3%,并可用于其它领域的质量检测中。

Using a simulation of physical model and according to the analogical principle,a simplified double-layer model of the surface and roadbed of concrete highway is established,practical methods of distinguishing the reflected ultrasonic wave,measuring the velocity of the reflected ultrasonic wave and the time parameter,which the ultrasonic wave takes from leaving source to the received by receiver,are put forward.With a special observation system,the surface thickness of concrete highway is derived by the velocity and time parameter.It is shown that the result is high precise with a relative error less than 3% and this non-damaging inspection can be applied to other area.