Multi-mode full-focusing detection method and system for rocket fuel storage tank weld joint and medium

A technology of rocket fuel and detection method, which is applied in the direction of measuring device, analyzing material, processing the response signal of detection, etc. Accurate identification and measurement, the effect of improving detection capabilities

Pending Publication Date: 2020-06-09
SHANGHAI SPACE PRECISION MACHINERY RES INST +1
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Problems solved by technology

[0003] When the array ultrasonic method is used to detect the defects such as air holes and cracks that may exist at the weld position of the rocket fuel tank, due to the thin wall thickness of the part, it is easily affected by the ultrasonic near field, and the defect image also has a large distortion

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  • Multi-mode full-focusing detection method and system for rocket fuel storage tank weld joint and medium
  • Multi-mode full-focusing detection method and system for rocket fuel storage tank weld joint and medium
  • Multi-mode full-focusing detection method and system for rocket fuel storage tank weld joint and medium

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[0043] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0044] The multi-mode full-focus detection method of the rocket fuel tank weld of the present invention uses the wedge coupling method to receive the full matrix data, and then establishes the sound beam path imaging strategy with multiple acoustic wave modes and multiple reflection times to perform acoustic Calculation of beam propagation time. According to the propagation time of the sound beam, the collected full matrix data is translated and superimposed to obtain the full focus...

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Abstract

The invention provides a multi-mode full-focusing detection method and system for a rocket fuel storage tank weld joint and a medium. The multi-mode full-focusing detection method comprises the steps:1, collecting array ultrasonic full-matrix data; 2, determining acoustic beam transmitting and receiving paths; 3, calculating the propagation time of an acoustic beam according to the acoustic beamtransmitting and receiving paths; 4, converting the array ultrasonic full-matrix data according to the acoustic beam propagation time to obtain a full-matrix image matrix; 5, performing comparative analysis and judgment on the full-matrix image matrix; and step 6, detecting a judgment result of the full-matrix image matrix. According to the invention, the imaging resolution can be remarkably improved, imaging distortion is reduced, and the detection capability is improved.

Description

Technical field [0001] The invention relates to the technical field of array ultrasonic all-focus detection, in particular to a multi-mode all-focus detection method, system and medium for welds of rocket fuel tanks. Background technique [0002] Detection and evaluation based on full matrix data is a new array ultrasound technology developed in the past ten years. Unlike the method based on phase control, it does not use the synthetic sound beam to interact with the internal defects of the specimen. Its working mode is called full matrix acquisition. The full-focus method is the most widely used time-domain full-matrix data detection and imaging algorithm. The full-focus method can use post-processing calculations to achieve detection and imaging of any number of focused sound beams without increasing the number of sound beams, breaking through the routine The detection capability bottleneck of the array ultrasonic detection method greatly improves the sensitivity and resolution...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/06G01N29/07G01N29/44
CPCG01N29/069G01N29/07G01N29/4445G01N2291/011G01N2291/0234G01N2291/0289G01N2291/106G01N2291/2675
Inventor 王飞周正干危荃李文涛李洋马超群
Owner SHANGHAI SPACE PRECISION MACHINERY RES INST
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