System and method for multi-channel strain dynamic detection of wind turbine planetary gearbox

Abstract

The present invention relates to vibration signal detection technology, in particular to a wind power generator planetary gearbox multi-path dynamic detection system and method, including a broadband light source, an optical fiber jumper, a power cord, an optical fiber one-way isolator, a first optical fiber coupler, a manual precision Sliding table, first fiber grating sensor, DC stabilized power supply, high-speed data cache server, signal conditioning circuit board, optical fiber splitter, photoelectric converter, precision operational amplifier, second fiber grating sensor, data acquisition card, industrial control computer and user terminals. The present invention detects the internal vibration of the planetary gearbox by adopting the basic technical principle of fiber laser sensing / fiber grating sensing, and has excellent performance of anti-electromagnetic interference, correspondingly, it can significantly improve the signal-to-noise ratio of the detected signal, Sensitivity, can effectively detect the root strain signal, and has strong universal applicability in the field of planetary gearbox vibration detection.

Description

technical field [0001] The invention relates to a vibration signal detection technology, in particular to a multi-path strain dynamic detection system and method for a planetary gearbox of a wind generator. Background technique [0002] The planetary gearbox is an important node in the wind turbine transmission system to realize the speed-increasing transmission. Because it has been under low-speed and heavy-load conditions for a long time and is subjected to alternating loads, its reliability is reduced. The planetary gearbox is the core link in the wind turbine transmission system. When it fails, it will cause the wind turbine to shut down, affecting the work efficiency. In severe cases, it may cause serious accidents, and even damage the entire equipment, resulting in major economic losses. [0003] At present, the method for detecting the state of the planetary gearbox mainly relies on the vibration signal, that is, installing an acceleration sensor on the outer casing ...

AI Technical Summary

Problems solved by technology

However, at present, root strain signals are mainly collected through resistance strain gauges. The special electromagnetic environment inside the wind turbine determines that there must be a lot of interference when deploying this type of sensor on site, thereby reducing the signal-to-noise ratio of the signal and limiting the detection of root strain-based signals. The popularization and application of the state detection method of the planetary gearbox

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