冲击-回波法测量混凝土厚度与缺陷

Detecting thickness and default of concrete by impact echo method

冲击回波法是近几年来新兴的一种超声检测方法，它是采用落球、锤击等方法在被测物件中产生应力波，用传感器接收回波，然后用时域或频域分析回波反射位置，以判断混凝土中缺陷位置的方法。本文就冲击回波法测量混凝土厚度及缺陷的问题进行了探讨，并利用冲击回波法进行了现场检测，以此促进向工程实用化发展。

Impact Echo Method is a new ultrasonic testing technique. It is a method of detecting default position of concrete based on transient stress wave propagation generated by steel ball or hammer that impacts on the surface of specimen. A displacement transducer located close to the impact point is to monitor the surface displacements caused by the arrival of the reflected waves. The analysis of displacement waveform can be performed in the time domain or in the frequcncy domain that can be used to locate default in concrete structures. The use of impact echo method for non destructivc testing of thickness and flaws of concrete was discussed in this paper. A in suit test for the construct of concreta by the impact echo method was made.