Anomaliendiagnosevorrichtung und Anomaliendiagnoseverfahren für Kugelgewindetrieb

Details

Veröffentlichungs-Nr.

EP4722680

Anmeldetag

15. Januar 2024

Veröffentlichung

28. November 2024

Rechtsraum

EP

Abstract

To provide an abnormality diagnosis device and an abnormality diagnosis method for a ball screw that can detect an abnormality such as damage or wear that has occurred in a screw shaft. An abnormality diagnosis device for a ball screw includes a vibration sensor (21) that detects vibration during an operation of the ball screw,a filter processing unit (23) that executes, on a vibration signal acquired by the vibration sensor (21), filtering processing for extracting a frequency band including at least a characteristic frequency corresponding to a specific frequency of the ball screw, an envelope processing unit (241) that executes envelope processing for a vibration signal after the filtering processing, a frequency analysis processing unit (242) that executes fast Fourier transform processing on a time domain signal after the envelope processing, a peak hold averaging processing unit (243) that executes peak hold averaging processing for frequency domain data for each sampling period in the fast Fourier transform processing, and an abnormality determination unit (25) that performs abnormality determination for the ball screw based on the frequency domain data after the peak hold averaging processing.

Anmelder

Firma

NSK Ltd.

Land

🇯🇵 Japan