常压储罐存储介质往往具有易燃、易爆、高毒等特点，其发生的泄露、爆炸等事故易造成严重的经济损失、人员伤亡和社会影响。现有的定检方法存在着漏检、工期长、影响生产和误检等缺点。采用声发射技术在线评估罐底腐蚀状况具有高可靠性特点，能够实现非侵入式的整体评价。通过采用参数滤波、时差滤波、护卫传感器的方法，滤除环境噪声、机械噪声、电磁噪声等干扰数据，对滤波后的有效数据进行综合评级，根据不同等级腐蚀状况给出相应的维修建议。声发射在线评估技术具有不停产、不清罐，减少环境污染，节省储罐的检测维护费用，提高储罐安全状态的管理水平等优点。

Atmospheric storage tank storage media are flammable, explosive, high toxic characteristic, and the leak, explosion and other accidents shall cause serious economic loss, personnel casualties and social influence. The existing inspection methods are subjected with undetected error, long construction period, the influence on production and error detection. High reliability and non-invasive overall evaluation might be realized by using the acoustic emission technique to on-line assessment of tank bottom corrosion status. The parameters filter, filter of the time difference sensor method, filtering noise, mechanical noise, electromagnetic noise interference data and the filtered data comprehensive rating according to the different levels of corrosion condition give the corresponding repair advice. Acoustic emission evaluation technology is characteristic of non-disrupting, needing no tank cleaning, reducing environmental pollution, saving tank inspection and maintenance costs, thus improving the management level of storage to be in safety condition etc.