Patent ID: 6286227
Filing Date: 2001-09-11
Classification: G01B

Abstract:
An inside micrometer system comprising:a micrometer head including:a first probe adapted to make contact with a first point, anda motor drive attached to said first probe;a second probe attached to said micrometer head and adapted to make contact with a second point, said first and second probes being aligned in the configuration of a rod;a controller for repeatedly advancing and retracting the first probe relative to the second probe;a contact detector to detect when the first probe contacts said first point as the first probe is advanced and retracted and the second probe is held in contact with said second point; anda computer for recording distances at which the first probe contacts the first point;the computer being adapted to maintain a running measurement value based on said distances and a target measurement value, based on a preset number and further including an error indicator to signal any difference between the running and target measurement values.