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A Triangulation Method for FRP Acoustic Emission Source

An acoustic emission source and triangulation positioning technology, which is applied in the direction of material analysis, analysis materials, instruments, etc., using acoustic emission technology, can solve the problems of acoustic emission propagation speed, positioning error, large acoustic emission wave attenuation, etc., to achieve Ease of operation, accurate measurement results, and the effect of increased sensor spacing

Active Publication Date: 2018-10-23
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0004] In addition, some technicians also proposed to use four probes for non-destructive testing of the same acoustic emission source of composite materials to detect and form a positioning scheme, but this scheme does not solve the propagation speed of acoustic emission in different directions in FRP composite materials There is a problem of positioning errors caused by differences. In addition, the acoustic emission wave has a large attenuation in the FRP, and it will be received by the four sensors only when the distance between the sensors is very small.

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  • A Triangulation Method for FRP Acoustic Emission Source
  • A Triangulation Method for FRP Acoustic Emission Source
  • A Triangulation Method for FRP Acoustic Emission Source

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Embodiment Construction

[0036] Aiming at the problem that the traditional acoustic emission non-destructive detection cannot accurately locate the composite material of glass fiber reinforced plastic, the invention provides a triangular positioning method of the fiber glass fiber reinforced plastic acoustic emission source.

[0037] In step 1, the measurement angle and propagation velocity of the propagation characteristics of the FRP to be tested are measured, and the selected angles are 0°, 15°, 30°, 45°, 60°, 75°, and 90°. The acquired test results were obtained using the curve fitting function in an Excel spreadsheet. The obtained angle-velocity polynomial; the fitting formula contains two variables of angle α and velocity v, such as figure 2

[0038] Step 2, the sensor probe is arranged on the FRP tank body to be tested according to the arrangement method of isosceles triangle;

[0039] Step three, such as figure 1 Set the coordinates A(x) of the three vertices of the isosceles triangle 1 ,...

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Abstract

The invention discloses a glass fiber reinforced plastic acoustic emission source triangulation location method. According to the technical scheme, the method comprises the steps that 1, to-be-measured glass fiber reinforced plastic angle-speed polynomial is subjected to fitting; 2, sensor probes are arranged on a glass fiber reinforced plastic tank to be measured according to an isosceles triangle arrangement method; 3, coordinates of three vertexes of an isosceles triangle are set; 4, location results are obtained through operation. The glass fiber reinforced plastic acoustic emission source triangulation location method has the advantages that the problem that for the acoustic emission detection mode of the composite material of glass fiber reinforced plastic, the propagation speeds in different directions are different due to material anisotropy, and a location error is big is solved; the whole method is simple and easy to operate, and complex artificial operation can be replaced by means of curve fitting in an Excel table; the final measurement results are accurate.

Description

technical field [0001] The invention relates to the technical field of acoustic emission detection, in particular to a triangular positioning method for a fiberglass acoustic emission source. Background technique [0002] FRP composite materials have many advantages such as light weight, high strength, corrosion resistance, good insulation, good heat insulation, good designability, and excellent craftsmanship. They are widely used in the construction industry, petrochemical industry, transportation industry, electronic communication and military In industry and other fields, FRP storage tanks have the advantages of reliable quality, safety and stability, and durability, and are widely used in oil fields. However, FRP composites are prone to aging and have poor impact resistance. During use, cracks and delamination damage often occur, resulting in a decline in the structural performance of the composite material, and in severe cases, causing major economic losses. Therefore,...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N29/14
CPCG01N29/14G01N2291/011G01N2291/0231
Inventor 陈健飞马波杨勇周先军李标仇东泉王安泉盛华刘海波江文军陈丽娜樊户伟
Owner CHINA PETROLEUM & CHEM CORP
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