Marine diesel engine torsional vibration signal processing method and device

Abstract

The invention relates to a marine diesel engine torsional vibration signal processing method. The method includes the following steps that: intensive resampling is performed on a marine diesel engine signals, and zero position detection is performed; and interpolation processing is performed on obtained signals, zero position detection is performed on sampling signals, a transformation point is searched, a zero-crossing time point is determined, and interpolation processing iteration is performed to obtain high-sampling marine diesel engine torsional vibration signals. According to the method of the invention, intensive resampling can be performed on obtained torsional vibration signals; a signal interpolation starting point is determined through the zero position detection, so that interpolation processing can be performed on the signals, and missing points existing in the signals are compensated; and the high-sampling marine diesel engine torsional vibration signals can be obtained through a plurality of times of signal zero position detection and interpolation processing, and the absolute error of the signal is smaller than 5%.

Description

technical field [0001] The invention relates to the technical field of diesel engines, in particular to a method and device for processing torsional vibration signals of marine diesel engines. Background technique [0002] Torsional vibration measurement can be divided into two categories: 1) measurement of shaft torsional stress, and 2) measurement of shaft torsion angle. The torsional vibration measurement we often say is actually the measurement of the shafting torsion angle. Commonly used sensors are: electromagnetic, photoelectric, eddy current, Hall and so on. According to the vibration pickup device from the previous contact type to the current non-contact type. The extraction method of torsional vibration signal is from mechanical inertial torsional vibration instrument to intelligent torsional vibration instrument, and then to today's digital torsional vibration test system. The corresponding measurement accuracy has also been greatly improved. Although there are...

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Problems solved by technology

[0004] In view of the above analysis, the present invention aims to provide a marine diesel engine torsional vibration signal processing method and device to solve the existing problems of difficult positioning of signal zero point, missing data points, and poor accuracy of torsional vibration signals

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