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A Current-Based Ventilator Stall and Surge Monitoring and Diagnosis Method

A diagnostic method and ventilator technology, applied in the direction of mechanical equipment, machine/engine, pump control, etc., can solve the problems of diagnosis, equipment and personnel injury, unavoidable stall and surge hazards, etc., to avoid injuries and save costs , Improve the effect of accuracy and intelligence

Inactive Publication Date: 2016-04-06
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current stall and surge monitoring method cannot diagnose stall and surge before the stall and surge occur, and the occurrence of stall and surge will cause damage to equipment and personnel, so the traditional stall and surge monitoring method does not The hazards of stall and surge cannot be avoided

Method used

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  • A Current-Based Ventilator Stall and Surge Monitoring and Diagnosis Method
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  • A Current-Based Ventilator Stall and Surge Monitoring and Diagnosis Method

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Experimental program
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Embodiment Construction

[0026] The present invention is described in detail below in conjunction with accompanying drawing:

[0027] The hardware structure of the system is as figure 1 As shown, it is mainly composed of a current transformer, a signal acquisition card, a microprocessor, a fan status display device, and a fault alarm device. It also has a parameter input interface, a data file reading and writing interface, and an alarm record storage interface; The microprocessor is STM32F107VCT6 processor.

[0028] Such as figure 2 Shown is the fault diagnosis flow chart of this system. Before signal collection, it is necessary to set the sampling frequency f, the array length N, and the interval vector h; after the parameter setting is completed, start to collect signals; perform an improved variogram operation on the collected current signals ;Fit the variogram value; take the extremum of γ(k,h) as the nugget point when h tends to 0; input the nugget point into the support vector machine model,...

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Abstract

The invention discloses a current-based method for monitoring and diagnosing stall speed and surge of a ventilator and belongs to the field of ventilator state monitoring. Aiming at the significance of the ventilator in the aspects of energy, chemical industry, metallurgy and the like and severe harm brought by the stall speed and the surge of the ventilator, the current-based method for monitoring and diagnosing the stall speed and the surge of the ventilator is researched and developed. A traditional method for monitoring and diagnosing the stall speed and the surge of the ventilator is incapable of discovering the stall speed and the surge before the stall speed and the surge occur, and effectively avoiding the stall speed and the surge occurring. According to the method disclosed by the invention, by adopting a current signal of the ventilator as a state signal, not only can the state of the ventilator be effectively monitored under a strong-interference environment but also additional devices do not need to be arranged. The acquired current signal is analyzed and processed by utilizing an improved variation function to find trend components, sensitive to the stall speed and the surge, in the current signal, and therefore, accurate, rapid and reliable online diagnosis and recognition of the stall speed and the surge of the ventilator are realized.

Description

technical field [0001] The invention relates to a current-based fan stall and surge monitoring and diagnosis method, which can diagnose and identify the fan stall and surge by monitoring and analyzing the current signal of the fan, especially for fan stall and surge The monitoring and diagnosis of the invention belong to the field of fan status monitoring. Background technique [0002] Ventilators are widely used in energy, metallurgy, machinery, chemical, pharmaceutical and other industries, and are the basic guarantee for safe production. The deterioration of the fan status, especially the occurrence of stall and surge, will cause serious losses. In the light case, the fan blades will break, and in severe cases, it will cause damage to the fan base and other auxiliary equipment and the accumulation of toxic and harmful gases, causing personnel injuries. casualties. In order to ensure safe production and avoid stall and surge, it is necessary to monitor and diagnose the v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D27/00
Inventor 付胜徐斌
Owner BEIJING UNIV OF TECH
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