Steam turbine shafting vibration data acquisition, preprocessing and remote sending system

Abstract

The invention provides a steam turbine shafting vibration data acquisition, preprocessing and remote sending system. The system includes a key phase signal sensor, a key phase signal conditioning circuit, at least one vibration signal sensor set, at least one vibration signal conditioning circuit, a pulse counter, a multichannel synchronous digital-to-analog converter, an ARM controller, an SRAM,an FPGA high-performance calculation module, an Ethernet communication module and a cloud server. According to the system provided by the invention, multichannel synchronous steam turbine shafting vibration data acquisition and complicated real-time preprocessing and sending functions are integrated in one system, aiming at steam turbine shafting vibration acquisition, preprocessing and remote sending service requirements based on internet and big data, based on actual need of data analysis, real-time preprocessing and feature extraction are performed after original vibration data are acquired, and feature values required by data analysis are remotely sent by use of a network.

Description

technical field [0001] The invention relates to the field of vibration data collection and analysis of a steam turbine shaft system, in particular to a system for data collection, preprocessing and remote transmission of the vibration data of a steam turbine shaft system. Background technique [0002] Vibration collection of steam turbine shafting refers to collecting vibration signals (displacement) of various parts of the main shaft of the steam turbine and sending them to relevant analysis devices. The synchronization and triggering of the vibration signal are determined by the same key phase signal. The key phase signal means that there is a cogging on the shaft, and this signal will be triggered once every revolution of the shaft. Generally, it is required that no matter what the rotational speed is, a fixed integer power of 2 points (usually 128) needs to be collected for each rotation (between two key phase signals), that is, the whole cycle sampling. The vibration s...

AI Technical Summary

Problems solved by technology

This structure is suitable for on-site collection and on-site analysis, but not suitable for remote diagnosis services based on the Internet

[0009] Moreover, there is a security problem for remote data transmission, and the existing devices generally do not consider the data encryption problem

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