Built-in Acoustic Emission Detection Method for Storage Tank Bottom Corrosion

Abstract

The invention relates to a built-in acoustic emission detection method for storage tank bottom plate corrosion. The method is as follows: installing a built-in acoustic emission detection device, and laying a ring of acoustic emission sensors on the outer wall of the storage tank near the bottom plate at equal heights; opening the built-in acoustic emission detection device. Emission detection device, the driving roller drives the aluminum-plastic pipe down, the sensor box starts to move downward, and the vertical displacement of the dropped acoustic emission sensor is determined through the reading of the depth gauge; the level of the dropped sensor is determined through the acoustic material characteristic matrix test Position and sensitivity, finally reach the predetermined position, start detection; after the data collection is completed, turn on the self-priming pump, spray the degreaser, use the coiler to raise the sensor box, and remove the crude oil on the outer wall of the aluminum-plastic pipe. The invention penetrates the acoustic emission sensor into the storage tank and forms an array with the sensors arranged on the outer wall of the storage tank to jointly monitor the corrosion damage of the bottom plate of the storage tank and more effectively evaluate the corrosion damage of the bottom plate of the storage tank.

Description

technical field [0001] The invention relates to a method for detecting storage tanks, in particular to a built-in acoustic emission detection method for storage tank bottom plate corrosion. Background technique [0002] The traditional acoustic emission tank floor detection technology is to couple the acoustic emission sensor to the tank wall to be inspected for passive listening, and then transmit the signal to the external acoustic emission instrument through the transmission cable for data processing by the host computer. Because the corrosion signal propagation path of the tank bottom plate passes through the crude oil to the tank wall, and then is received by the acoustic emission sensor, the signal is mixed with a lot of noise signals. At the same time, due to the relatively limited environment, the multipath effect also has a great impact on the received signal, so in this case, it is a great obstacle to accurately locate the corrosion area. Especially for the health...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a storage tank bottom plate corrosion acoustic emission detection method, which is used to solve the problem that the traditional acoustic emission tank bottom plate detection technology may have a weak acoustic emission signal in the center area and is easy to miss.

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