High-frequency guided wave detection method for storage tank bottom plate
A storage tank floor and high-frequency technology, which is applied in the field of high-frequency guided wave detection of the storage tank floor, can solve the problems of multiple states of sound sources, small detection range, and low efficiency, and achieve the effect of improving detection efficiency and efficiency
Active Publication Date: 2020-09-01
HEFEI GENERAL MACHINERY RES INST +2
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Problems solved by technology
At present, traditional detection methods such as magnetic flux leakage, longitudinal wave ultrasonic thickness measurement, eddy current detection, and magnetic particle detection are generally used for the detection of storage tank bottom plates. These detection methods can only detect the plate surface below the sensor, and the single detection range is small and the efficiency is very low.
In actual work, it is difficult to achieve a comprehensive and rapid inspection of the large base plate using the above non-destructive testing methods
Acoustic emission detection is also a common detection method for storage tank bottom plates, but the acoustic emission signal of the storage tank bottom plate is weak, there are many sound sources and the state is complex, resulting in large errors in the location of sound sources in acoustic emission detection
Method used
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[0054] Such as Figure 1-8 As shown, the method for detecting the bottom plate of a storage tank with a high-frequency guided wave includes the following steps:
[0055] S1. Import the engineering drawing of the storage tank floor assembly to be tested into the software to obtain the information of each assembly;
[0056] Obtaining the distribution information of each puzzle includes the following steps:
[0057] S11. Number n jigsaw panels to obtain a numbering matrix k n is the number of coordinate points of the nth jigsaw puzzle, and the matrix of the center coordinates of the n jigsaw puzzle is where C nbx is the x-coordinate of the center of the nth jigsaw puzzle, C nby is the y-coordinate of the center of the nth jigsaw puzzle;
[0058] Get the center coordinate C of each puzzle b , the coordinate matrix of j vertices of n puzzle pieces is C nrxj 、C nryj Respectively are the x-coordinates and y-coordinates corresponding to the vertex j of the nth jigsaw puzz...
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Abstract
The invention discloses a method of detecting a storage tank bottom plate by high-frequency guided waves. The method comprises the following steps: S1, guiding an engineering drawing on jointed platesfor the to-be-detected storage tank bottom plate into software to obtain information of all the jointed plates; S2, determining scanning parameters of the to-be-detected storage tank bottom plate andcalculating detection point distribution values required for the storage tank bottom plate; S3, generating a detection point distribution map and a coordinate matrix according to the detection pointdistribution values, moving a high-frequency guided wave sensor to all detection points and rotating in the direction perpendicular to the bottom plate a set speed by taking each of the detection points as a circle center to horizontally scan the storage tank bottom plate. The method disclosed by the invention has the advantage that through the rotation of the high-frequency guided wave sensor, the effect of horizontally scanning the storage tank bottom plate is realized, so that the scanning efficiency is greatly improved.
Description
technical field [0001] The invention relates to the field of non-destructive testing methods for chemical equipment, in particular to a method for testing storage tank bottom plates with high-frequency guided waves. Background technique [0002] With the continuous and rapid development of my country's economy, the demand for oil is increasing. In order to ensure national energy security, my country has vigorously built strategic oil reserves in recent years. Large storage tanks are important storage equipment for petrochemical raw materials and products such as crude oil, refined oil, and intermediate products. During the service of the storage tank, affected by the operating environment and production conditions, especially under the joint action of chemical corrosion and electrochemical corrosion, the bottom plate is prone to corrosion damage, pitting and perforation and other defects, causing crude oil leakage, leading to environmental pollution and even Safety accident...
Claims
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IPC IPC(8): G01N29/04G01N29/06
CPCG01N29/04G01N29/048G01N29/0654G01N29/069G01N2291/023
Inventor 关卫和江勇强天鹏林海立郭鹏举张晓强
Owner HEFEI GENERAL MACHINERY RES INST