APPARATUS FOR DETECTING OPERATION OF MACHINE TOOL

摘要

The invention reverts to an apparatus for detecting operational conditions of a working machine, wherein are provided: a high-frequency oscillating demodulation circuit comprising a crystal resonator; a coil directly connected to said high-frequency oscillating demodulation circuit; and a measuring core capable of varying oscillation frequencies of said high-frequency oscillating demodulation circuit by moving inside said coil relatively thereto.