METHOD & DEVICE FOR MEASURING PROFILE WITHOUT USE OF REFERENCE PROFILE

摘要

A method for measuring surface profiles is disclosed, which does not require an accurate reference profile. A linear array of displacement sensors is used to measure data sets, from which a numerical approximation to 2nd or higher-order derivative is calculated, a nd the profile is then calculated by a numerical integration method. A device that measures profile by this method is also disclosed. This method and device is particularly useful for measuring profiles of long objects, including continuous rolled or extruded metal or plastic sections, where use of accurate reference profiles are impractical.