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Methods and apparatus for porosity measurement

A device, a technique for decay slope, applied in measurement devices, permeability/surface area analysis, suspension and porous material analysis, etc., can solve problems such as difficult transfer of technology to manufacturing environment, and achieve extended life, simple method configuration, and simplification The effect of the calibration and inspection process

Inactive Publication Date: 2007-08-22
GENERAL ELECTRIC CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These calculations will make it difficult to transfer these technologies to a manufacturing environment

Method used

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  • Methods and apparatus for porosity measurement
  • Methods and apparatus for porosity measurement
  • Methods and apparatus for porosity measurement

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Embodiment Construction

[0020] Technical effects of the present invention include nondestructively measuring the porosity of composite structures and / or generating digital imaging showing the porosity of composite structures.

[0021] Some configurations of the present invention use a porosity measurement method that utilizes standard ultrasonic immersion equipment similar to that used to inspect metal forgings. Such equipment is readily available for inspecting composite structures and is produced by many companies, although the computer subsystem of the readily available equipment cannot be preconfigured as described herein. In some constructions, and with reference to the example structural block diagram 100 of FIG. 1 and the physical circuit diagram of FIG. 2, there are three subsections of the ultrasonic impregnation apparatus 200, namely

[0022] (a) scanning system 102 configured to position transducer 108 for transmitting and collecting ultrasound data,

[0023] (b) an ultrasound transducer ...

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Abstract

A method for non-destructively inspecting a composite structure with a single ultrasonic transducer includes determining a calibration amplitude of ultrasonic transmissions emitted by the single ultrasonic transducer to a reflector in a fluid-filled immersion tank and received back at the single ultrasonic transducer. The method also includes inserting the composite structure into the fluid-filled immersion tank between the reflector and the single ultrasonic transducer. In addition, the method includes scanning the composite structure with the single ultrasonic transducer to measure ultrasonic amplitudes for sound waves traveling through the composite structure, reflecting off the reflector plate and then traveling back through the structure to the single ultrasonic transducer. The measured ultrasonic amplitudes are corrected using the calibration amplitude and other measured transmission losses, and the corrected ultrasonic amplitudes are utilized to generate either or both a digital image showing porosity or a measurement of porosity of the composite structure.

Description

technical field [0001] The present invention generally relates to a method and apparatus for nondestructively measuring porosity in composite structures. Background technique [0002] Identifying internal flaws in large structures is critical to the safe use of these structures. For metallic structures, identifying and characterizing fusion-related inclusions and cracks is critical to extending part life. Inspection of large metal components has led to the development of sophisticated techniques for detecting surface and volumetric defects. These techniques include x-rays, penetrants, and ultrasound methods. [0003] New product designs and manufacturing methods can create different types of defects beyond those generated during the fabrication of large metal structures. Designing new structures based on polymeric matrix compounds is an example of these new technologies. Composite structures have some unique manufacturing process related imperfections that do not exist w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/08G01N29/11G01N29/30
CPCG01N2291/0231G01N29/11G01N2291/0234G01N2015/0846G01N2291/045G01N29/4463G01N15/088G01N2291/0427G01N29/06G01N29/30G01N29/22G01N29/04
Inventor F·A·里德T·J·巴青格尔
Owner GENERAL ELECTRIC CO
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