Reference
9.2.9)
Ten
Point
Height
of
Irregularities
Rz
(JIS)
The sum of the mean height of the five highest profile peaks and the mean depth of the five
deepest profile valley from mean within the sampling length.
5
1
5
1
5
1
5
1
i
i
i
i
Yv
Yp
RzJIS
9.2.10)
Maximum
Height
of
Profile
Ry
(JIS)
The same as 9.2.3 Rz.
9.2.11)
Skewness
of
the
profile
RSk
RSk is the quotient of the mean cube value of the profile deviation (Yi) and the cube of Rq within
sampling length.
lr
dx
x
Z
lr
Rq
Rsk
0
3
3
1
1
9.2.13)
Third
Maximum
Peak
‐
to
‐
valley
Height
R3z
R
3z
is the mean of the sum of the third profile peak height and the third profile valley depth of
each sampling length over evaluation length.
n
i
i
zi
R
z
R
1
3
3
n
中线
R3z1
R3z2
R3z3
R3z4
···
R3zn