Hi All,
votefavorite
I am trying to measure a curved profile of a surface(2D) to determine the surface availability at different rate of testing. I have attached an image for a rough picture.
Actually I have a reference geometry and performed two tests to determine the behavior. They two had different profiles at top portion. So I considered an axis for reference geometry and drew radial lines with 15deg angle difference each and marked those points as 1 (15 deg anticlockwise from vertical axis),2(30 deg anticlockwise from vertical axis),3,... and measured length of the radial lines which gives the distance of the top profile at different points(L1 at pt1, L2 at pt2...). I did the same on my first test results and got the lengths L1',L2'...and with second test lengths L1",L2".... Now I estimated the deviation of the profile by calculating the error like this
test1: Error = ((L1-L1')/L1)*100%
test2: Error = ((L1-L1")/L1)*100%
As the number of experiments increases it is a bit tedious to divide lines based on angles and measure the deviation of the top profile and hence would like to look for an alternative. One approach would be to eliminate the axis and split the complete area with square grids and get the coordinates (x,y) and find the error, but this seems not too good. Could any one please suggest an easy method to do find out the difference in the top profile?
Thanks in advance
