Diagnosis system based on multipath acquisition of gearbox operation vibration data

Abstract

The invention discloses a diagnosis system based on multipath acquisition of gearbox operation vibration data. The diagnosis system comprises a sensor excitation output circuit, a double-amplificationcircuit, a synchronous analog-to-digital conversion circuit and a diagnosis module, wherein the sensor excitation output circuit is used for outputting a gearbox vibration signal; the double-amplification circuit is used for amplifying the gearbox vibration signal to generate two paths of amplified signals; the synchronous analog-to-digital conversion circuit is used for converting the two pathsof amplified signals into digital signals; and the diagnosis module is used for outputting and selecting the valid digital signal to monitor a gearbox operation vibration state. According to the diagnosis system, the double amplification circuits are arranged, the small gearbox operation vibration signal is amplified by a certain multiple to meet the input requirement of the analog-to-digital converter, meanwhile, the signal gearbox operation impact large can be reduced by a certain multiple to meet the input requirement of the analog-to-digital converter, the measurement precision of the signal within the full output range is improved, and the abnormity of the monitoring signal can be found in time.

Description

technical field [0001] The invention relates to a diagnosis system based on multi-channel acquisition of vibration data of a gearbox, and belongs to the technical field of mechanical equipment monitoring. Background technique [0002] With the development of modern industry, mechanical equipment is developing towards large-scale, continuous, precise and automatic, which makes the structure of equipment more and more complex, and the requirements for performance indicators are also getting higher and higher. Therefore, higher requirements are placed on the reliability of mechanical equipment (such as equipment with complex working conditions such as high-speed rail gearboxes). Whether the equipment can operate safely and reliably is very important for ensuring product quality, improving production capacity, and ensuring safety. Usually, major equipment operates in a complex working environment, coupled with its own complex structure, which increases the difficulty of conditio...

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Problems solved by technology

[0003] At present, in conventional gearbox vibration monitoring, there is usually only one vibration sensor, which can only be used to monitor the normal operating vibration state of the gear. Since the signal is relatively small during normal operation, a larger magnification factor is used to ensure the signal conditioning. The acquisition of small signals is accurate, but due to the influence of the working environment of the gear itself, there will often be a large impact signal. At this time, the excessive amplification and conditioning circuit will easily cause the signal to be too large and affect the subsequent analog-to-digital conversion, causing the analog-to-digital conversion to overflow. Unable to accurately monitor the gearbox

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