苏联交通研究所研制了一套仪器和附属设备,该仪器在10米远的地方能记录肉眼看不见的10微米宽的小裂缝。仪器是根据声学发射原理“听”到故障的。当对工程构筑物进行研究时,其部件表面安置了声学发送器。它是一个超灵敏小型的传音器,它能“听”清大面积混凝土上的缺陷,由发送器发出的信号传给自动记录的电子插 The Soviet Transportation Institute has developed a set of instruments and ancillary equipment that can record 10 micrometer wide small cracks that are invisible to the naked eye at a distance of 10 meters. The instrument is “listening” to the fault based on the acoustic emission principle. When studying an engineering structure, acoustic transmitters were placed on the surface of its components. It is an ultra-sensitive small-sized microphone that can “listen” to clear defects on concrete in Qing’s area and transmit the signal from the transmitter to the automatically recorded electronic plug.