A New High-Sensitivity Package-Leak Testing Method for MEMS Sensors

2009 ◽  
Author(s):  
M. Fujiyoshi ◽  
Y. Nonomura ◽  
H. Senda
Keyword(s):  
High Sensitivity ◽  
Mems Sensors ◽  
Testing Method ◽  
Leak Testing

On the Long Time High Sensitivity Creep Testing Method

1955 ◽  
Vol 58 (441) ◽  
pp. 731-736
Author(s):  
Takeshi AKUTAGAWA ◽  
Toshio FUJITA ◽  
Kazuo TAKEMURA
Keyword(s):  
High Sensitivity ◽  
Creep Testing ◽  
Testing Method ◽  
Long Time

scholarly journals High-sensitivity photoacoustic leak testing

2003 ◽  
Vol 114 (4) ◽  
pp. 1926-1933 ◽  
Author(s):  
Eric Huang ◽  
David R. Dowling ◽  
Timothy Whelan ◽  
John L. Spiesberger
Keyword(s):  
High Sensitivity ◽  
Leak Testing

scholarly journals Magnetic Flux Leakage Course of Inner Defects and Its Detectable Depth

2021 ◽  
Vol 34 (1) ◽  
Author(s):  
Jianbo Wu ◽  
Wenqiang Wu ◽  
Erlong Li ◽  
Yihua Kang
Keyword(s):  
Magnetic Flux ◽  
Steel Structure ◽  
High Sensitivity ◽  
Magnetic Flux Leakage ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Near Surface ◽  
Testing Method ◽  
Non Destructive ◽  
Flux Leakage

AbstractAs a promising non-destructive testing (NDT) method, magnetic flux leakage (MFL) testing has been widely used for steel structure inspection. However, MFL testing still faces a great challenge to detect inner defects. Existing MFL course researches mainly focus on surface-breaking defects while that of inner defects is overlooked. In the paper, MFL course of inner defects is investigated by building magnetic circuit models, performing numerical simulations, and conducting MFL experiments. It is found that the near-surface wall has an enhancing effect on the MFL course due to higher permeability of steel than that of air. Further, a high-sensitivity MFL testing method consisting of Helmholtz coil magnetization and induction coil with a high permeability core is proposed to increase the detectable depth of inner defects. Experimental results show that inner defects with buried depth up to 80.0 mm can be detected, suggesting that the proposed MFL method has the potential to detect deeply-buried defects and has a promising future in the field of NDT.

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