A method for detecting channel abnormalities of vibration monitoring and protection devices for rotating equipment

Abstract

The invention discloses a rotating equipment vibration monitoring protection device channel abnormity detection method. The rotating equipment vibration monitoring protection device channel abnormity detection method comprises steps that a vibration monitoring protection device is used to acquire correlation coefficients of various channels according to positions of detection points corresponding to the various channels and the characteristics of the rotating equipment, and weights are set according to engineering experience; the vibration monitoring protection device is used for the real-time monitoring of the vibration data of the various channels, and is used to detect whether the changing trend of the vibration data meets the correlation constraints of the channels; the vibration signals of one channel are enhanced or weakened abnormally, and the vibration signals of other related channels are not changed, and the situation is repeated a plurality of times, the channel is determined to be abnormal, and abnormality of sensors and abnormity of device sampling channels are included. By adopting the analysis and the real-time detection of the vibration detection point correlation, whether the abnormal change of the single channel meets the correlation constraints is determined, and therefore the self-inspection of the rotating equipment vibration monitoring protection device is completed, and the reliability of the device is improved.

Description

technical field [0001] The invention relates to the field of state monitoring and diagnosis of rotating equipment, in particular to a channel self-inspection method for vibration signals of a vibration monitoring protection device for rotating equipment. Background technique [0002] Rotating equipment, such as various motors and generators, is widely used in the fields of electric power, metallurgy, mining, transportation, etc., and is the key equipment for enterprise production. With the gradual increase in the requirements for the safe operation of equipment, the condition monitoring of rotating equipment has also attracted more and more attention from users. [0003] The key content of condition monitoring of rotating equipment is vibration monitoring and protection. There are many reasons for mechanical vibration. In addition to product defects, installation defects, and improper operation and maintenance of rotating equipment, abnormal loads (related to the production...

AI Technical Summary

Problems solved by technology

At present, there are many products at home and abroad. Some products have simple functions and often misjudgment; Redundant configuration and mutual verification of sensor signals at the same measuring point are realized, and the cost is relatively high

Once the channel is abnormal (the sensor is abnormal or the sampling channel of the monitoring protection device is abnormal), the device cannot distinguish it from the real fault signal, and it needs to stop for detection, which is time-consuming and laborious; if the channel abnormality cannot be identified in time, it will also cause the vibration monitoring and protection device to malfunction. incorrect action

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