公开(公告)号：US3612839A

公开(公告)日：1971-10-12

申请号：US3612839D

申请日：1967-11-13

Applicant: INDUSTRIAL NUCLEONICS CORP

Inventor： SPITZ DAVID A ,  DEWITT JOHN E

IPC: G01G17/02 ,  G01B15/02 ,  G01B15/04 ,  G01N23/16 ,  G01N25/56 ,  G06F7/38

CPC classification number: G01N23/16 ,  G01B15/025 ,  G01B15/045

Abstract: Disclosed are a system for and method of dividing or partitioning the total variance properties of a moving sheet into the components of: cross direction; long-term machine direction; short-term machine direction; total machine direction; cross direction; and profile. A single detector for the property is scanned at right angles to the sheet edges a plurality of times. During each scan the property is sampled a plurality of times to derive a profile contour. A computer responds to the sampled values to derive the variance components.