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Nondestructive detection method based on fluorescent material

A non-destructive testing, fluorescent material technology, applied in the direction of material analysis, material analysis, fluorescence/phosphorescence, etc. by optical means, it can solve the problem of three-dimensional quantitative measurement of the surface, and achieve the effect of reducing the scrap rate and improving the sensitivity.

Inactive Publication Date: 2018-09-21
薛笑杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of these methods can be used for effective three-dimensional quantitative measurement of the surface.

Method used

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  • Nondestructive detection method based on fluorescent material
  • Nondestructive detection method based on fluorescent material
  • Nondestructive detection method based on fluorescent material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The following takes the depth distribution of the groove structure on the surface of an aluminum plate as an example to further illustrate the non-destructive testing method of the present invention:

[0039] will figure 2 The surface of an aluminum plate of the surface groove structure shown is clean, and the surface stains are removed, and there will be a fluorescent agent Er with a concentration of 0.1M 3+ Ion doped NaYF 4 The ethanol solution of nanoparticles is evenly sprayed on the surface of the groove structure of the aluminum plate. Place the aluminum plate on the sample placement platform with the groove facing up, move the probe with the lens to the area to be measured, and emit pulsed laser light under the control of the pulse controller at a constant excitation light power, and automatically pass the fluorescence lifetime detection device Obtain a fluorescence lifetime signal with a better signal. In this example, the excitation light is a laser with a wavele...

Embodiment 2

[0041] The following takes a solid part surface test as an example to further illustrate the non-destructive testing method of the present invention:

[0042] will Figure 5 The surface of the solid part shown is clean, remove the surface stains, and will have a Yb concentration of 0.1M 3+ -Tm 3 + -Tb 3+ Ion doped NaYF 4 The ethanol solution of nanoparticles is evenly sprayed on the surface of the solid part. Place the solid part on the sample placement platform with the surface to be tested facing upwards, move the laser probe with lens to the area to be tested, constant excitation light power, continuous laser excitation, and obtain the signal from the fluorescent agent through the spectrum test device The spectrum of light. In this example, the excitation light is a laser with a wavelength of 976 nanometers. Move the probe back and forth, change the relative distance between the probe and the test point without defects on the surface of the solid part in the vertical test pla...

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Abstract

The invention provides a nondestructive detection method based on a fluorescent material. The method comprises the following steps: 1) covering the surface of a product to be detected with a fluorescent agent layer; 2) irradiating the surface of the product to be detected, covered with the fluorescent agent layer, by non-parallel exciting light; and 3) collecting the excited fluorescent signal, and performing conversion treatment to obtain the morphologic information of the surface of the product to be detected. The nondestructive detection method provided by the invention can be used for acquiring the morphologic information of the surface of the product to be detected by covering the surface of the product to be detected with the fluorescent agent and exciting the surface of the productto be detected by the non-parallel exciting light to obtain the corresponding fluorescent signal.

Description

Technical field [0001] The invention belongs to the field of nondestructive testing of products, and specifically relates to a nondestructive testing method based on fluorescent materials. Background technique [0002] Non-destructive testing technology has been widely used in many industrial fields such as product testing and post-maintenance. Traditional non-destructive testing methods include ultrasonic method, penetration method, and magnetic particle testing method. At present, none of the existing test methods and devices can perform quantitative detection on the surface, but can only perform qualitative detection. And these methods have certain limitations. For example, the magnetic particle testing method requires the material to be tested to have a certain degree of magnetism after being energized. Ultrasonic detection method and penetration method can detect a wide range of solid materials, including metal, non-metal, non-magnetic and ferromagnetic materials. Howeve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64G01N21/95
CPCG01N21/6402G01N21/9515
Inventor 薛笑杰
Owner 薛笑杰