Mapping of Arsenic Pollution in Burkina Faso Using a New Field Measurement Technique

2014 ◽  
Keyword(s):  
Burkina Faso ◽  
Measurement Technique ◽  
Field Measurement ◽  
Arsenic Pollution

The use of ac field measurement technique in crack profile prediction

1991 ◽  
Vol 40 (1) ◽  
pp. 75-80
Author(s):  
M.O. Lai
Keyword(s):  
Measurement Technique ◽  
Field Measurement ◽  
Ac Field ◽  
Crack Profile

Investigation of optimal time-domain feature for non-surface defect detection through a pulsed alternating current field measurement technique

2017 ◽  
Vol 29 (1) ◽  
pp. 015601 ◽  
Author(s):  
Jiuhao Ge ◽  
Wei Li ◽  
Guoming Chen ◽  
Xiaokang Yin ◽  
Jian Liu ◽  
...  
Keyword(s):  
Defect Detection ◽  
Measurement Technique ◽  
Time Domain ◽  
Field Measurement ◽  
Surface Defect ◽  
Alternating Current ◽  
Optimal Time ◽  
Current Field ◽  
Surface Defect Detection

Removal of Probe Liftoff Effects on Crack Detection and Sizing in Metals by the AC Field Measurement Technique

2008 ◽  
Vol 44 (8) ◽  
pp. 2066-2073 ◽  
Author(s):  
R.K. Amineh ◽  
M. Ravan ◽  
S. Sadeghi ◽  
R. Moini
Keyword(s):  
Measurement Technique ◽  
Field Measurement ◽  
Crack Detection ◽  
Ac Field

A High Accuracy of Magnetometer by Using Independent Directional Magnetic Field Measurement Technique

2014 ◽  
Vol 565 ◽  
pp. 133-137
Author(s):  
Athirot Mano ◽  
Wisut Titiroongruang
Keyword(s):  
Magnetic Field ◽  
Magnetic Flux ◽  
Flux Density ◽  
Measurement Technique ◽  
Field Measurement ◽  
High Accuracy ◽  
Two Dimensions ◽  
Magnetic Flux Density ◽  
Magnetic Field Measurement ◽  
Hall Sensors

In a measurement of magnetic flux density with high accuracy by using Hall effect sensor must be considered position of Hall sensor, that perfect perpendicular with magnetic flux line for measurement. Only one Hall element can cause measuring error. Therefore, this paper presents an application of independent directional magnetic field measurement technique on two dimensions for high accuracy magnetometer. It is presented by using two Hall sensors locate perpendicular to each other and use the relation of the two voltage output signal from both Hall sensors to calculate constant Hall voltage and Magnetic flux density with high accuracy by using trigonometric function with Lab-View programming. And as the result of experiment, this technique can reduce the limitation in term of this angle in the range magnetic flux density can be measured 0-1800 gauss. A calibration curve of this system compare with standard Gauss meter shows the coefficient of determination (R2) equal to 1 and has the accuracy percentage as less than 0.5%.

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