MOTOR VIBRATION CAUSE DETERMINATION SYSTEM

• US 20180209867A1
• Filed: 12/20/2017
• Published: 07/26/2018
• Est. Priority Date: 01/23/2017
• Status: Active Grant

• Current Assignee: Fanuc Corporation
• Original Assignee: Fanuc Corporation
• Inventors: OOHARA, Taku
• Granted Patent: US 10,240,996 B2
• Time in Patent Office: Days
• CPC Class Codes: G01H 11/08 using piezoelectric devices
• CPC Class Codes: G01H 17/00 Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups see provisionally also G01H1/00
• CPC Class Codes: G01M 1/14 Determining imbalance G01M1/30 takes precedence
• CPC Class Codes: G01M 13/02 Gearings; Transmission mechanisms

Abstract

A motor vibration cause determination system includes: a vibration sensor unit capable of detecting vibration of the motor in a driving state, the vibration sensor unit detecting a first vibration which is vibration of the motor in a stand-alone state before shipping, a second vibration which is vibration of the motor in a stand-alone state and in a non-connection state in which the motor is not connected to the main shaft after shipping, and a third vibration which is vibration of the motor in the connection state; a vibration information storage unit that stores information on the vibration of the motor detected by the vibration sensor unit, the information including information on the first, second, and third vibrations; and a vibration cause determination unit that determines the cause of vibration occurring in the connection state on the basis of the vibration information stored in the vibration information storage unit.

Claims

1. A motor vibration cause determination system that determines the cause of vibration occurring in a connection state in which a motor is directly or indirectly connected to a main shaft, comprising:

a vibration sensor unit capable of detecting vibration of the motor in a driving state, the vibration sensor unit detecting a first vibration which is vibration of the motor in a stand-alone state before shipping, a second vibration which is vibration of the motor in a stand-alone state and in a non-connection state in which the motor is not connected to the main shaft after shipping, and a third vibration which is vibration of the motor in the connection state;

a vibration information storage unit that stores information on the vibration of the motor detected by the vibration sensor unit, the information including information on the first vibration, information on the second vibration, and information on the third vibration; and

a vibration cause determination unit that determines the cause of vibration occurring in the connection state on the basis of the first vibration information, the second vibration information, and the third vibration information stored in the vibration information storage unit.

2. The motor vibration cause determination system according to claim 1, wherein the vibration sensor unit and the vibration information storage unit are disposed with the motor.