Calibration method for inspecting the wall thickness of containers.

摘要

A computer senses a voltage which is representative of wall thickness and defines with the use of a voltage/thickness curve the thickness of that wall portion. To define this curve, a plurality of voltage/thickness points are inputted into the computer. Each point is defined by sensing and defining the voltage of a wall portion on a calibration standard having a known thickness and defining a calibration thickness corresponding to that voltage using the following equation: <MATH> equating these calibration thicknesses to the corresponding voltages produced by the sensing means when sensing said at least two thicknesses of the standard. <IMAGE>