DIGITAL MEASURING INSTRUMENT HAVING FLEXIBLE MEASURING LINE

摘要

A digital tape measure includes a housing containing a measuring line, a rotatable measuring drum in engagement with the measuring line so that movement of the measuring line causes rotation of the measuring drum, and a rotatable disc coupled with the measuring drum for rotating simultaneously with the measuring drum. The digital tape measure includes an optical sensor in communication with the rotatable disk for compiling data related to rotation of the disk, and electronic circuitry in communication with the optical sensor for processing the compiled data so as to calculate a length of the measuring line drawn from the housing.