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Fault detection method and system

A technology for fault detection and failure mode, which is used in measurement devices, measurement of ultrasonic/sonic/infrasonic waves, pump control, etc., which can solve the problems of large workload, low accuracy and complexity in sample extraction

Active Publication Date: 2020-10-23
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large number of vibration signals in the fault detection of centrifugal pumps, the workload of sample extraction is large and complicated. The above methods are all nonlinear analysis in a two-dimensional perspective, and the accuracy is not high when identifying multiple fault states.

Method used

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  • Fault detection method and system
  • Fault detection method and system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] refer to figure 1 , a fault detection method comprising the following steps:

[0071] S1: Obtain the first multi-source characteristic signal of the centrifugal pump in normal mode;

[0072] S2: Denoising the first multi-source characteristic signal to obtain a first three-dimensional time-varying spectrum array;

[0073] S3: Obtain a plurality of first loading factors according to the first three-dimensional time-varying spectrum array;

[0074] S4: Obtain multiple second loading factors of the centrifugal pump in failure mode;

[0075] S5: Comparing the plurality of second loading factors with the plurality of first loading factors to obtain the location and type of the fault.

[0076] By obtaining the first multi-source feature of the centrifugal pump in normal mode, where the first multi-source feature refers to the signal features at different positions of the centrifugal pump, the first three-dimensional time-varying spectrum array is obtained after denoising, ...

Embodiment 2

[0115] refer to figure 2 , on the basis of embodiment 1, a fault detection system, comprising: a data acquisition module, a denoising module, a data analysis module and a comparison module;

[0116] The data acquisition module is used to acquire the first multi-source characteristic signal of the centrifugal pump in normal mode and send it to the denoising module;

[0117] The denoising module is used to denoise the first multi-source characteristic signal, obtain a first three-dimensional time-varying spectrum array and send it to the data analysis module;

[0118] The data analysis module is used to obtain a plurality of first factor loads according to the first three-dimensional time-varying spectrum array and send them to the comparison module; load factors and send to said comparison module;

[0119] The comparison module is used to compare the plurality of second loading factors with the plurality of first loading factors, and output the location and type of the fault...

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Abstract

The invention discloses a fault diagnosis method and system. The method comprises the following steps of S1, acquiring a first multi-source characteristic signal of a centrifugal pump in a normal mode; S2, denoising the first multi-source characteristic signal to obtain a first three-dimensional time-varying spectrum array; S3, acquiring a plurality of first loading factors according to the firstthree-dimensional time-varying spectrum array; S4, acquiring a plurality of second loading factors of the centrifugal pump in a fault mode; and S5, comparing the plurality of second loading factors with the plurality of first loading factors to obtain the position and the type of fault. When the second loading factors in the fault mode are obviously different from the first loading factors in thenormal mode, the fault and the fault position can be detected, so that the diagnosis accuracy is effectively improved.

Description

technical field [0001] The invention relates to the field of fault detection, in particular to a fault detection method and system. Background technique [0002] The centrifugal pump mainly uses mechanical energy or other energy to increase the potential energy, pressure energy and kinetic energy of the fluid, so as to complete the transportation of the fluid. It can make the fluid flow from a low-level area to a high-level area, or from a low-pressure area to a high-pressure area. Indispensable mechanical equipment. It has the advantages of wide applicability, small size, light weight, low cost, simple structure, convenient operation, less failure, long life, and no pulsation in the discharged liquid. Because of its simple structure and durability, the pump is widely used in farmland Irrigation, petrochemical engineering, water conservancy engineering, metallurgy and shipbuilding, etc. [0003] The centrifugal pump mainly includes the pump body (volute, pump shaft, impell...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D15/00G01H17/00
CPCF04D15/0088G01H17/00
Inventor 陈汉新柯耀杨柳王琪黄浪苗育茁
Owner WUHAN INSTITUTE OF TECHNOLOGY
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