A multi-channel weak vibration signal synchronous acquisition device and analysis method

Abstract

The invention relates to a multi-channel weak vibration signal synchronous acquisition device and an analysis method, in particular to a multi-channel weak vibration signal synchronous acquisition device and a multi-channel weak vibration signal synchronous analysis method. The multi-channel weak vibration signal synchronous acquisition device specifically comprises a distributed type vibration sensor, a differential driver, a weak signal conditioning module, a multi-stage filtering network, a rear amplifying module, a synchronous acquisition module, a parameter calculating module, a data processing module, a parameter control module and a sampling control module, and the acquisition device has the advantages that multiple parameters can be adjusted, and multi-channel weak vibration signals are synchronously acquired. According to the multi-channel weak vibration signal synchronous analysis method, the multi-channel vibration signals acquired by the acquisition device are synchronously analyzed with a correlation matrix analysis method, characteristic parameters representing synchronous characteristics are extracted, and a basis is provided for fault prediction and diagnosis based on synchronization analysis.

Description

technical field [0001] The present invention relates to a multi-channel weak vibration signal acquisition device and analysis method, in particular to a device for synchronous acquisition of weak vibration signals distributed in different positions in the same system and a synchronous analysis of multi-channel weak vibration signals based on correlation matrix analysis method. Background technique [0002] Whether it is in scientific research or in daily engineering practice, it is common to encounter small changes in physical quantities that need to be measured. These small changes are reflected in the changes in the weak current or voltage signal output by the sensor. These weak signals are easily overwhelmed by strong background noise or the noise of the detection circuit, and cannot be detected by traditional methods. Use new circuits and new high-precision devices to adjust the weak current and voltage signals to suppress noise and external interference. At the same ti...

AI Technical Summary

Problems solved by technology

[0005] The current vibration signal detection is mainly aimed at the measurement of strong vibration signals, and there are few detection devices for weak vibration signals and their versatility is poor; the current acquisition channels of vibration signals are independent of each other, which is not conducive to the same The joint analysis of the vibration at different positions in the equipment is used to better determine the operating status of the equipment and give early warning of early weak faults; the current analysis of the vibration signal of the equipment is to analyze each signal independently, without considering the concept of the system and ignoring Correlation between vibration signals from different areas of the same device

Images