Current type fault diagnosis apparatus and method for micro-vibration motor

Abstract

The invention discloses a current type fault diagnosis apparatus and method for a micro-vibration motor. A current change condition in a power-on circuit of the micro-vibration motor is reflected by an acquired voltage signal of a sampling resistor connected to the power-on circuit of the micro-vibration motor in series, the interference of physical measurement is avoided, relevant characteristicvalues are extracted from the acquired voltage signal, a fault of the micro-vibration motor is pre-diagnosed, and then the fault of the micro-vibration motor is finally diagnosed according to Booleanlogic, so that the fault type of the micro-vibration motor can be accurately recognized, and furthermore, the whole process adopts automatic identification operation, a worker does not need to excessively participate in the whole generation process, the detection efficiency is greatly improved, and the labor production cost is reduced. According to the apparatus and the method, judgment can be carried out for 100 times within 0.7 second, so that the fault diagnosis accuracy is ensured, and meanwhile, the fault diagnosis efficiency is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing, and relates to a current-type fault diagnosis instrument and a diagnosis method for a miniature vibration motor based on wavelet packet reconstruction. Background technique [0002] With the rapid development of interactive electronic devices, more and more attention will be paid to whether the devices can stably transmit effective signals in operation. In particular, the micro-vibration motor, which is the basis for electronic equipment to transmit vibration signals, is directly related to the user's experience and even safety. At the same time, due to the huge production quantity and demand of interactive electronic equipment, it is very important to conduct non-destructive testing on micro vibration motors to ensure the tactile and auditory comfort and safety of electronic equipment in use by users. The production environment at home and abroad began to carry out non-destructi...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the existing micro-vibration motor nondestructive flaw detection technology such as low detection efficiency and difficulty in detecting the faults of micro-vibration motors with eccentric blocks, the purpose of the present invention is to provide a current-type fault diagnostic instrument for micro-vibration motors and Diagnosis method, while realizing accurate detection of various faults of micro-vibration motors (including micro-vibration motors with eccentric weights), and improving detection efficiency

If the commutation of the micro vibration motor is abnormal due to various mechanical problems (such as split brushes, unrounded commutator plates, differences in winding resistance, etc.) during the operation of the micro vibration motor, it will cause changes in the commutation current.

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