Novel anti-missing signal acquisition method for rotary machinery

Abstract

The invention relates to a novel anti-missed-sampling signal acquisition method for a rotary machine, which comprises three anti-missed-sampling logics which are a fault acquisition mode, an abnormal working condition acquisition mode and a timing acquisition mode in sequence from high to low according to priority ranking, and is controllable in signal sampling frequency and capable of sampling in real time. According to the invention, triggering acquisition of signals is carried out through multiple index parameters, and three acquisition modes, namely a fault acquisition mode, a working condition abnormity acquisition mode and a timing acquisition mode, are established; different types of index parameters are used for constructing an evaluation index library, seven dimensioned indexes and seven dimensionless indexes are adopted in a fault acquisition mode, multiple algorithm judgment strategies are formulated according to actual working conditions, and an optimal acquisition strategy is formulated, so that accurate acquisition of signals at a fault moment is realized, and missing acquisition of fault signals is avoided to the greatest extent.

Description

technical field [0001] The invention relates to the field of signal collection, in particular to a novel leak-proof signal collection method for rotating machinery. Background technique [0002] At present, the signal acquisition for mechanical structures usually adopts the strategy of continuous acquisition or fixed-point acquisition; continuous acquisition means continuous acquisition of vibration data, and fixed-point acquisition means acquisition at fixed time intervals; this type of acquisition strategy is relatively rigid, and the amount of data collected It is relatively large but contains a low amount of effective information, and it is easy to miss the data at the time of failure. It is not suitable for rotating machinery. In order to solve the above problems, practitioners in the industrial field have used vibration signal indicators as the standard to trigger signal acquisition, but the indicators used are generalized. The ability is poor, the number of indicators...

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Problems solved by technology

[0002] At present, the strategy of continuous collection or fixed-point collection is usually adopted for signal collection of mechanical structures; continuous collection means continuous collection of vibration data, and fixed-point collection means collection at fixed time intervals; this kind of collection strategy is relatively rigid, and the amount of data collected It is large but contains low amount of effective information, and it is easy to miss the data at the time of failure, so it is not suitable for rotating machinery; in order to solve the above problems, practitioners in the industrial field have used vibration signal indicators as the standard for signal trigger collection, but the indicators used are generalized The ability is poor and the number of indicators is small, the effect of trigger collection is poor, and it cannot be applied in multiple industrial scenarios

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