Defect Location Analysis of Tank Bottom Based on Acoustic Emission with Different Location Algorithms

Abstract: Acoustic emission technology used in the state testing of the tank bottom has become a new hot spot for researchers and designers. Two location algorithms, such as three-point locating method and multi-point locating method are applied in this paper using multi-channel acoustic emission system for detection of tank bottom. The location result of the broken lead calibration shows that a larger error will be produced for different algorithm. The effects of the arrangement form of sensors on locating corrosion defect have been analyzed through experiments with two algorithms. The typical arrangement form of sensors has been discussed to study the effects on corrosion-pitting location. The test results show that two algorithms both have the capacity of locating defects and multipoint positioning algorithm is more accurate. It is not clear that the sensors distribution forms affect corrosion-pitting location. But the circumferential distribution of sensors along the bottom is better to test the state of tank with the consideration of feasibility, accuracy and rationality of signal source region. It i