A vibration test system and an analysis method for vibration signal time domain waveforms thereof

Abstract

The invention provides a vibration test system used for rotary machines. The vibration test system comprises a plurality of vibration sensors used for acquiring multiple paths of vibration signals of a rotary machine and a general purpose computation image processor used for processing, display, computation and analysis of the multiple paths of vibration signals. The vibration sensors include eddy current displacement sensors used for acquiring key phase point signals. The general purpose computation image processor comprises a signal processing module used for conditioning, analog-digital conversion and encoding of the vibration signals and a monitoring module which displays the multiple paths of processed vibration signals in the time domain waveform image form and performs computation and analysis on the signals. The vibration test system has the advantages that the eddy current displacement sensors and the general purpose computation image processor cooperate to acquire vibration signals with key phase information for field analysis and judgment, so that multiple paths of vibration signals can be analyzed and processed synchronously and the practicality is great. The invention also provides an analysis method for vibration signal time domain waveforms of the vibration test system.

Description

technical field [0001] The invention relates to a collection system and an analysis method for a vibration signal of a rotor of a rotating machine, in particular to a vibration measurement system and a method for analyzing the time-domain waveform of the vibration signal. Background technique [0002] Rotating machinery will generate vibration and noise during the rotation process, which is the main cause of product and equipment failures. The online monitoring technology of rotating machinery is one of the important means to understand the operating status of equipment and ensure the safe operation of equipment. The collection and analysis of rotor vibration signals is one of the effective means to understand the operation status of equipment. [0003] Portable vibration analyzers currently on the market can directly collect and display time-domain and frequency-domain diagrams of rotor vibration signals, and more advanced analyzers can provide various methods for rotor sig...

AI Technical Summary

Problems solved by technology

The process of making maps for these methods is complex and requires the operation of complex algorithms

When multiple channels collect data at the same time, it will take up a lot of computing resources and have high requirements on the computing power of the processor of the analyzer. However, most analyzers cannot perform multi-channel synchronous analysis and synchronous processing of multiple complex algorithms.

At the same time, reading pictures and reading spectrum requires professional training, which is not convenient for on-site analysis and diagnosis

[0004] The time-domain waveform displayed by the vibration measurement system is the most direct information obtained during on-site vibration testing. Through the time-domain waveform, the vibration amplitude of the rotor can be observed over a period of time. However, due to the lack of a reference system on the time axis, it is impossible to obtain more Rich phase information, if you want to obtain phase information, you need to perform Fourier transform, and the calculation process is complicated

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