Intelligent bearing monitoring system based on transient speed and method of system

Abstract

The invention discloses an intelligent bearing monitoring system based on transient speed and the method of the system. The monitoring system is composed of an integrated signal conditioning circuit board and a vibration acceleration sensor circuit board so as to achieve conditioning and output of two paths of revolution speed transducer signals, two paths of temperature sensor signals and one path of three-shaft vibration acceleration signal. The acquired acceleration signal and pulse signal are processed to obtain a stationary angular domain signal, a stationary time domain signal and a transient rotation speed, and the method mainly comprises the following four steps: step 1, dividing a bearing into a plurality of areas in circumferential direction and mounting magnetic steel, rotating the magnetic steel along with the bearing to obtain a pulse signal through a Hall sensor; step 2, calculating a time difference between adjacent pulses to obtain a transient rotation speed of the bearing; step 3, performing equal interpolation on the time domain signal acquired by each area to obtain the stationary time domain signal; and step 4, resampling interpolation on the time domain signal according to the varying relation of the rotation speed to obtain the stationary angular domain signal. By adopting the monitoring system, the realtime conditioning and monitoring of three dynamic parameters such as rotation speed, temperature and vibration acceleration are overall achieved.

Description

technical field [0001] The invention relates to the field of mechanical automation, in particular to an intelligent bearing monitoring system and method based on transient speed. Background technique [0002] High-speed trains and urban rail transit are a symbol of a country's advanced technology, and their reliability and safety are directly related to the personal and property safety of the people and the image of the country. Smart bearings have broken through the traditional bearing condition monitoring and diagnosis methods, and are a key technology applied to high-speed trains. At present, this technology is monopolized and blocked by foreign countries. Therefore, the study of smart bearings has great social and economic value. The concept of intelligent bearing is to integrate a variety of sensors to realize real-time monitoring and fault diagnosis of various dynamic parameters of the bearing. The original signal of the composite sensor is not necessarily the commonl...

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to realize the smooth transformation of the non-stationary signal. Although the existing encoder-based and tachometer-based equiangular sampling methods realize the smooth transformation of the signal, the sampling frequency of the former is fixed and low, and the conversion accuracy of the latter is low. low, and the installation of both acquisition devices has relatively large limitations, which is not conducive to practical application

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