Optimized method of acoustic emission nondestructive testing location precision based on oil and gas tank

In order to achieve accurate location of acoustic emission (AE) sources in oil and gas tank, an optimized location method is proposed. The theoretical analysis of the influence mechanism of the main factors, such as noise interference, signal attenuation, wave velocity variation, sensor layout and size effect etc. based on the TDOA location algorithm is carried out. Then the correspondence between AE location algorithm and various factors is found, and the optimal settings of the corresponding source location parameters are completed. Finally, a part of oil and gas tank steel plat is taken as the research object, and the optimal settings of the source location parameters are verified by comparative experiments. The experimental results show that based on the parameters settings optimization corresponding to the influencing factors, the optimized locating method can effectively reduce the AE source location error in tank steel plat, improve the location precision of the AE source, and provide an effective method for the inversion of AE sources.