Diverse MF500M+ Manuale d'uso - Pagina 13

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Calculation of Magnetite from MF500M readings
Defining the sector thickness t to be the thickest point of a sector
bounded by the inside of the pipe and a straight line across the arc, and,
R is the radius of the inside of the pipe.
The
of sector thickness, t is:
Ratio of sector thickness to radius is:
o
(0 < θ < 90
)
Occlusion, f (fraction)
For θ in radians:
For θ in degrees:
Expressions 1 and 2 are plotted below together with a simple linear
approximation that could be appropriate for quick assessments.
t = R * (1 - cos(θ))
q = 1 - cos(θ) —–––––( 1 )
f = ( θ - (sin(2θ)/4) )/ π
f = ( θ∗π/180 - sin(2θ ∗ π/180)/4 )/ π —–––––( 2 )
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