A method for analysis and evaluation of measuring point accuracy of vibration acceleration sensor gearbox

Abstract

The invention aims to provide a method for analyzing and evaluating measure point precision of a gearbox in a vibration acceleration sensor, aiming at analyzing a plurality of sets of collected sample data at different measure point positions and a certain fixed position under various working conditions. The method comprises the following steps of: performing synchronous data collection of a vibration signal and a rotation speed signal of the gearbox by taking the rotation speed signal as the main control through the vibration acceleration sensor; extracting time domain characteristic values,analyzing and the evaluating the time domain characteristic values, and drawing an RMS (root mean square)-Peak picture and a box plot; calculating an order time spectrum and analyzing and evaluating the order time spectrum; and analyzing the result through time domain analysis and frequency domain analysis methods to form an analysis and evaluation result of the measure point precision of the gearbox. According to the method disclosed by the invention, the order time analysis on the vibration signal of a gearbox shell can be realized; optical positions better representing various fault characteristics can be obtained by analyzing the time domain and frequency domain characteristics; the measurement error is reduced; the installation position of the vibration sensor is determined; and an assurance is provided for the accuracy of the fault diagnosis.

Description

technical field [0001] The invention relates to a vibration data analysis technology, in particular to a method for analyzing and evaluating the accuracy of a measurement point of a gear box of a vibration acceleration sensor. Background technique [0002] Vibration acceleration sensors have been widely used in mechanical vibration engineering. The vibration signal of the measured object is acquired by the vibration sensor. During the test, the vibration sensor is in direct contact with the measured object, which can sensitively reflect the vibration changes. The vibration signal obtained by the vibration sensor installed on the surface of the tested body contains the vibration information of all parts inside the tested body, so as to obtain accurate fault diagnosis results. The test data obtained by any test method often contains errors, and the test factors have a great influence on the test results. Therefore, it is necessary to analyze and evaluate the test data resul...

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Problems solved by technology

[0005] At present, no systematic algorithm and rela...

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