A Soft Membrane Ultrasonic Phased Array Probe for Testing T-shaped Welds of Corrugated Steel Webs

A corrugated steel web, ultrasonic phased array technology, applied in the field of phased array probes, can solve the problems of detection quantitative error, large sensitivity difference, inability to overcome the flat surface coupling compensation problem, etc.

Active Publication Date: 2021-04-20
南昌市建筑科学研究所
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, ordinary phased array probes still cannot overcome the coupling compensation problem in the conversion process of planar and curved surfaces. There is a large difference in sensitivity, and there is still a large error in the detection and quantification of defects.

Method used

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  • A Soft Membrane Ultrasonic Phased Array Probe for Testing T-shaped Welds of Corrugated Steel Webs
  • A Soft Membrane Ultrasonic Phased Array Probe for Testing T-shaped Welds of Corrugated Steel Webs
  • A Soft Membrane Ultrasonic Phased Array Probe for Testing T-shaped Welds of Corrugated Steel Webs

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Embodiment Construction

[0017] Firstly, wave2000 is used for simulation research, and a simulation model of a phased array probe without soft membrane is established, such as figure 1 As shown, the piezoelectric wafer is excited from the middle of the top, and the whole probe model is made of plexiglass material (sound velocity of 2759 m / s), glycerin (sound velocity of 1900 m / s), ordinary steel material (sound velocity of 5659 m / s) from top to bottom. m / s) and a through hole (representing a φ5 hole with a sound velocity of 340 m / s). Ultrasonic waves are excited through the piezoelectric wafers and propagate in the structure, and the ultrasonic signals are received at the bottom below the holes. Then establish the soft membrane phased array probe simulation model, such as figure 2 As shown, the piezoelectric wafer is excited from the middle of the top, and the whole probe model from top to bottom is plexiglass material (sound velocity of 2759 m / s), glycerin (sound velocity of 1900 m / s), soft film ma...

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Abstract

The invention discloses a soft membrane ultrasonic phased array probe used for detecting T-shaped welds of corrugated steel webs, belonging to the technical field of phased array probes. The invention solves the problem of the coupling difference between the curved surface and the plane position detection during the continuous scanning process when the corrugated detection surface of the corrugated steel web is used for the phased array detection of the T-shaped weld. Glycerin is coupled with the phased array linear array chip and fixed with bolts, so that the detection surface of the probe can be flexibly contacted with the corrugated detection surface, increasing the coupling contact area, thereby improving the sensitivity of curved surface detection, and realizing the corrugated steel web Accurate and efficient detection of structures.

Description

technical field [0001] The invention belongs to the technical field of phased array probes, and in particular relates to a soft membrane ultrasonic phased array probe used for detecting T-shaped welds of corrugated steel webs. Background technique [0002] In recent years, corrugated steel web members are gradually replacing bulky concrete web structures, occupying a pivotal position in modern long-span new bridges, and their application forms and categories are more diverse. Because of its low material consumption, simple manufacturing process, easy transportation, and environmental protection, the corrugated steel web structure is better than concrete web members in terms of mechanical properties such as compression resistance and tensile strength, so its production and application have penetrated into domestic outside of multiple construction areas. It is not only used in the main girder structures of large floors and roofs in public facilities, but also supplies some bu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/24
CPCG01N29/245G01N2291/0289G01N2291/267
Inventor 王志刚孙万红徐力平郑辉熊青松周昌玉
Owner 南昌市建筑科学研究所
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