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Cylinder Scanning Strategy Variation

Peter Martignacco
I am scanning a cylinder using spiral scanning strategy and also comparing it to a concentric circle scan of the cylinder. Calculating the MAX inscribed circle value. I am measuring ID's from 2.5mm to 4.9mm. I am interrogating the surfaces in similar detail with the same dynamic parameters, and I am getting differences of up to 0.1mm which seems puzzlingly large. The concentric circle strategy is always smaller.
Any thoughts on what might be causing this? Thank you for your time.
Parents
  • Sinusoid :
    In an excel sheet :
    enter sphere radius in A1
    number of hits in A2
    =2*pi() in A3
    =A3/A2 in A4

    Then "angle" in B1,"x" in C1 , "y" in D1 and "z" in E1
    In B2, enter 0 and in B3, enter "=B2+$A$4", and copy until angle=2*pi (so line number of hits + 1 !)
    In C2, enter "=(B2/$A$3)*$A$1, and copy
    In D2, enter "=$A$1*SIN(A2)/4".......................(/4 gives the amplitude of sinusoid, you can enter more... less than 4 should be too large)
    In E2, just enter "=SQRT(SUMSQ(B2Smiley2))", and copy.

    I think that ii = xx/radius, jj = yy/radius and kk =zz /radius...


Reply
  • Sinusoid :
    In an excel sheet :
    enter sphere radius in A1
    number of hits in A2
    =2*pi() in A3
    =A3/A2 in A4

    Then "angle" in B1,"x" in C1 , "y" in D1 and "z" in E1
    In B2, enter 0 and in B3, enter "=B2+$A$4", and copy until angle=2*pi (so line number of hits + 1 !)
    In C2, enter "=(B2/$A$3)*$A$1, and copy
    In D2, enter "=$A$1*SIN(A2)/4".......................(/4 gives the amplitude of sinusoid, you can enter more... less than 4 should be too large)
    In E2, just enter "=SQRT(SUMSQ(B2Smiley2))", and copy.

    I think that ii = xx/radius, jj = yy/radius and kk =zz /radius...


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