基于储罐底板声发射源定位的基本理论,提出在储罐内部介质中放入传感器,与布置在罐外壁上罐底附近的传感器共同对储罐底板腐蚀缺陷声发射源进行识别的方法;分别进行了模拟储罐底板声源识别定位,模拟储罐声发射衰减特性与储罐底板腐蚀声发射源识别试验.结果表明,该声源识别定位方法可提高任意三角形定位中的检测对声源的识别度,增加罐底区域定位的面积,减少由于声波衰减而造成的漏检;另外,罐内传感器较罐外传感器对腐蚀声源的识别更为敏感,并可减小气候等因素带来的外界干扰对声源识别定位的影响.因此,该方法可提高声发射对储罐底板声源识别定位的可靠性,为储罐底板的声发射检测评价提供理论和试验依据.

Based on the acoustic emission source location theory of tank bottom,it is put forward that the sensors located inside the tank medium are employed together with the sensors arranged on tank outside wall near tank bottom to identify the acoustic source of tank bottom corrosion defects.Location experiment of simulative tank bottom,attenuation characteristic experiment of simulative tank and acoustic source identification experiment of simulative tank bottom corrosion have been conducted.The results show that the method of acoustic source identification and location could enhance the identification of acoustic source in arbitrary triangle location,increase the area of the tank bottom zone location,decrease the missing signals caused by acoustic attenuation,and at the same time the sensors inside tank are more sensitive to acoustic source of corrosion than that of outside tank,and reduce the influence caused by weather and other factors on acoustic source location.So the method can improve the reliability of acoustic emission source identification and location on tank bottom,provide theory and experiment foundation for acoustic emission testing evaluation of tank bottom.