Patent ID: 8346385

Claim:
An early-warning apparatus for health detection of a servo motor is applied to estimate vibration phenomenon of a CNC tool machine; the early-warning apparatus comprising: a servo motor having a built-in vibration detecting unit for detecting operational parameters of the servo motor and producing a vibration signal; and a servo driver connected to the servo motor, comprising: a microcontroller, comprising: a time-frequency transforming unit receiving the vibration signal and transforming the vibration signal in time and frequency domains; an analyzing unit connected to the time-frequency transforming unit and receiving the vibration signal and analyzing the vibration signal into a plurality of decomposed signals; a deterioration index calculating unit connected to the analyzing unit and calculating a deterioration index according to a comparison between the decomposed signals and an evaluation curve; and a health index calculating unit connected to the deterioration index calculating unit and calculating a health index according to the deterioration index; whereby the built-in vibration detecting unit is provided to dispense with additional external sensors, and to estimate the vibration phenomenon of the servo motor of the CNC tool machine according to the health index, thus analyzing non-linear and non-stationary characteristics of the estimated vibration phenomenon.