A fast non-destructive defect detection method for complex PCB surfaces

A fast non-destructive method of detection of wool content in blended fabrics was studied based on Near Infrared spectroscopy technology in order to avoid the time-consuming, tedious work and the destruction of samples in the traditional inspection. 621 wool/nylon, wool/polyester and wool/nylon/polyester blended fabrics were taken as research objects. To get the wool content, we established the wool near-infrared quantitative model by partial least squares (PLS) method after analyzing the color and composition of the samples. For verifying the validity and practicability of the model, 100 samples were chosen as an independent validation set. The variance analysis shows that there is no significant difference between Near Infrared fast detection method and national standard method (GB/T2910-2009),which indicates that this method is expected to be a means of fast non-destructive detection and will have extensive application future in the field of wool content detection.

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Non-destructive defect detection for MEMS devices using transient thermography

2016 6th Electronic System-Integration Technology Conference (ESTC) ◽

10.1109/estc.2016.7764459 ◽

2016 ◽

Author(s):

Xiaoting Wang ◽

David C. Whalley ◽

Vadim V. Silberschmidt

Keyword(s):

Defect Detection ◽

Mems Devices ◽

Transient Thermography ◽

Non Destructive

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Research on defect detection method of high-speed rail based on multi-frequency excitation composite electromagnetic

Measurement ◽

10.1016/j.measurement.2021.110351 ◽

2021 ◽

pp. 110351

Author(s):

Peng Xu ◽

Hongming Zeng ◽

Tengfei Qian ◽

Lili Liu

Keyword(s):

Defect Detection ◽

High Speed ◽

Detection Method ◽

High Speed Rail ◽

Frequency Excitation

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A REVIEW ON EDDY CURRENT THERMOGRAPHY TECHNIQUE FOR NON-DESTRUCTIVE TESTING APPLICATION

Jurnal Teknologi ◽

10.11113/.v78.7656 ◽

2016 ◽

Vol 78 (11) ◽

Author(s):

N. S. Rusli ◽

I. Z. Abidin ◽

S. A. Aziz

Keyword(s):

Defect Detection ◽

Eddy Current ◽

Infrared Camera ◽

Heat Diffusion ◽

Non Destructive Testing ◽

Destructive Testing ◽

Quantitative Characterisation ◽

Optimum Heating ◽

Non Destructive ◽

Eddy Current Heating

Eddy current thermography is one of the non-destructive testing techniques that provide advantages over other active thermography techniques in defect detection and analysis. The method of defect detection in eddy current thermography has become reliable due to its mode of interactions i.e. eddy current heating and heat diffusion, acquired via an infrared camera. Such ability has given the technique the advantages for non-destructive testing applications. The experimental parameters and settings which contribute towards optimum heating and defect detection capability have always been the focus of research associated with the technique. In addition, the knowledge and understanding of the characteristics heat distribution surrounding a defect is an important factor for successful inspection results. Thus, the quantitative characterisation of defect by this technique is possible compared to the conventional non-destructive which only acquired qualitative result. In this paper, a review of the eddy current thermography technique is presented which covers the physical principles of the technique, associated systems and its applications. Works on the application of the technique have been presented and discussed which demonstrates the ability of eddy current thermography for non-destructive testing of conductive materials.

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