DEVICE FOR MONITORING MACHINE OPERATING RATIO BY DETECTING CURRENT RUNNING THROUGH MOTOR OF MACHINE

摘要

PROBLEM TO BE SOLVED: To acquire the operation of a machine and to monitor the operating ratio by externally reducing any construction to the machine as much as possible. SOLUTION: An AC current sensor 3 for detecting the operating currents of a motor 2 for noticing the operation of a machine 1 from the outside is used as an input device so that machine construction can be extremely simplified, and that an operating ratio monitoring device can be constructed.