A New Approach Research For Tank Bottom Plate Positioning On The Application Of Simulation Corrosion Process

Acoustic emission detection is a kind of nondestructive testing methods that can overall structural integrity assessment on the equipment quickly,and detection to atmospheric vertical tank for online,make reasonable safety evaluation for tank finally.Tank bottom sound localization technology can reflect sound detection position,and the actual defect active source position is in conformity with the degree,however bottom sound localization technology has some limitations,so in atmospheric vertical tank corrosion state acoustic emission testing,positioning source as a supplementary analysis method,but positioning results still have considerable reference value,the detecting results have certain foresight.According to the tank bottom acoustic emission source localization basic principle,based on this in the tank internal medium in the sensor,and near the arrangement in the bottom of the tank wall,to increase the bottom acoustic emission source location credibility.Simulated respectively tank bottom location experiment and atmospheric vertical tank bottom positioning experiment,simulation experimental results show that the location positioning method can reduce the positioning error,and with the increase of the number of internal sensor,positioning error are also gradually reduced.Atmospheric vertical tank bottom positioning experiments can be obtained:acoustic emission wave attenuation in the water tank bottom metal is small,proof of the tank medium acoustic emission detection method is measurable and feasibility;According to the size of the detection radius can be sure that the test method can increase the bottom area location area,prevent leakage location phenomenon:As for time positioning can reduce the positioning error,and with the increase of the number of sensors and according to certain array for configuration,to further reduce positioning error to improve positioning accuracy,for tank bottom acoustic emission testing evaluation provide reasonable basis.In this paper,simulation tank floor corrosion process acoustic emission testing,will be in small water tank inside in the simulation of tank bottom corrosion source,and the acoustic emission underwater sensor in the tank water medium,to monitor the corrosion process floor,for different channel the collected corrosion acoustic emission signal characteristic parameter and wave shape feature extraction and comparative analysis,on the basis of wavelet transform method for corrosion acoustic emission signal further spectrum coefficient distribution analysis.