粗糙度参数解释.pdf

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1、PtProfiledepthDINENISO4287ProfiledepthPt(totalheightofP-profile)isthesumofthelargestprofilepeakheightandthelargestprofilevalleydepthoftheP-profilewithintheevaluationlengthln(referencelength).Thereferencelengthhastobestated.P-profile(primaryprofile)iscomputedfromthetracedprof

2、ile•byexcludingthenominalformbyusingthemethodofbestfitleastsquaresofthetypeindicatedinthedrawing,e.g.alinearregressionlineand•byexcludingultra-shortwavelengthsfromtheevaluationbyusingthelsprofilefilter,whichconsiderablyincreasescomparability.(DINENISO3274)P-profilePtReferenc

3、elengthBACKNEXTMAHRGMBH,Germany-EDITION1/09/99