Diagnosis method and system for early failure of mechanical equipment, equipment and storage medium

Abstract

The invention discloses a diagnosis method and system for early failure of mechanical equipment, equipment and a storage medium. The diagnosis method comprises the steps of acquiring a sudden change characteristic signal of which the characteristic is suddenly changed in a mechanical equipment signal; obtaining a time-frequency graph of the sudden change characteristic signal, and finding out a sensitive frequency band from the time-frequency graph of the sudden change characteristic signal; performing local amplification on the time-frequency graph of the sensitive frequency band, calculating a time interval between two adjacent impacts in the sudden change characteristic signal, and calculating the fault frequency of the sudden change characteristic signal by using the time interval; and obtaining a time-frequency diagram of the mechanical equipment signal, searching a time point when the time interval corresponding to the fault frequency appears for the first time from the time-frequency diagram of the mechanical equipment signal, and determining the time point as a time point when the mechanical equipment breaks down at the earliest. The early failure of the mechanical equipment can be diagnosed, and the earliest failure time point of the mechanical equipment is determined.

Description

technical field [0001] The invention belongs to the technical field of mechanical equipment fault diagnosis, and in particular relates to a method, system, equipment and storage medium for early fault diagnosis of mechanical equipment. Background technique [0002] Rotating machinery has played an indispensable role since the beginning of the industrial revolution, and they are widely used in aerospace, petroleum, chemical and other fields. With the continuous development and progress of science and technology, machinery and equipment are developing in the direction of large-scale, complex, and high-speed, which greatly improves production efficiency, promotes social development, and greatly improves the national economy; but with With the widespread use of mechanical equipment in all walks of life, people have also put forward higher requirements for the safety and reliability of mechanical equipment. [0003] Because of the need to meet the rapid development of social eco...

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Problems solved by technology

The vibration detection and diagnosis method is to extract the shock signal from the vibration signal with strong background noise interference. The amplitude of the shock signal is generally very small. It is difficult to directly extract the fault characteristics of the mechanical equipment from the vibration signal, and it is difficult to realize the early fault diagnosis of the mechanical equipment.

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