scholarly journals Beamforming Applied to Ultrasound Analysis in Detection of Bearing Defects

Sensors ◽  
2021 ◽  
Vol 21 (20) ◽  
pp. 6803
Author(s):  
Thomas Verellen ◽  
Florian Verbelen ◽  
Kurt Stockman ◽  
Jan Steckel
Keyword(s):  
Condition Monitoring ◽  
Microphone Array ◽  
Industrial Plant ◽  
Industrial Plants ◽  
Acoustic Data ◽  
Non Invasive ◽  
Bearing Defects ◽  
Spatial Noise ◽  
Paper Condition ◽  
Monitoring Application

The bearings of rotating machinery often fail, leading to unforeseen downtime of large machines in industrial plants. Therefore, condition monitoring can be a powerful tool to aid in the quick identification of these faults and make it possible to plan maintenance before the fault becomes too drastic, reducing downtime and cost. Predictive maintenance is often based on information gathered from accelerometers. However, these sensors are contact-based, making them less attractive for use in an industrial plant and more prone to breakage. In this paper, condition monitoring based on ultrasound is researched, where non-invasive sensors are used to record the noise originating from different defects of the Machinery Fault Simulator. The acoustic data are recorded using a sparse microphone array in a lab environment. The same array was used to record real spatial noise in a fully operational plant which was later added to the acoustic data containing the different defects with a variety of Signal To Noise ratios. In this paper, we compare the classification results of the noisy acoustic data of only one microphone to the beamformed acoustic data. We do this to investigate how beamforming could improve the classification process in an ultrasound condition-monitoring application in a real industrial plant.

scholarly journals Two Current-Based Methods for the Detection of Bearing and Impeller Faults in Variable Speed Pumps

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4514
Author(s):  
Vincent Becker ◽  
Thilo Schwamm ◽  
Sven Urschel ◽  
Jose Alfonso Antonino-Daviu
Keyword(s):  
Condition Monitoring ◽  
False Alarms ◽  
Signature Analysis ◽  
Variable Speed ◽  
Monitoring Methods ◽  
Time Frequency ◽  
Motor Current ◽  
Load Point ◽  
Bearing Defects ◽  
Current Signature

The growing number of variable speed drives (VSDs) in industry has an impact on the future development of condition monitoring methods. In research, more and more attention is being paid to condition monitoring based on motor current evaluation. However, there are currently only a few contributions to current-based pump diagnosis. In this paper, two current-based methods for the detection of bearing defects, impeller clogging, and cracked impellers are presented. The first approach, load point-dependent fault indicator analysis (LoPoFIA), is an approach that was derived from motor current signature analysis (MCSA). Compared to MCSA, the novelty of LoPoFIA is that only amplitudes at typical fault frequencies in the current spectrum are considered as a function of the hydraulic load point. The second approach is advanced transient current signature analysis (ATCSA), which represents a time-frequency analysis of a current signal during start-up. According to the literature, ATCSA is mainly used for motor diagnosis. As a test item, a VSD-driven circulation pump was measured in a pump test bench. Compared to MCSA, both LoPoFIA and ATCSA showed improvements in terms of minimizing false alarms. However, LoPoFIA simplifies the separation of bearing defects and impeller defects, as impeller defects especially influence higher flow ranges. Compared to LoPoFIA, ATCSA represents a more efficient method in terms of minimizing measurement effort. In summary, both LoPoFIA and ATCSA provide important insights into the behavior of faulty pumps and can be advantageous compared to MCSA in terms of false alarms and fault separation.

An Intelligent Interactive Layout CAD System for Industrial Plants

1990 ◽  
Author(s):  
Ken-ichi Kameyama ◽  
Koichi Kondo ◽  
Koichi Ohtomi
Keyword(s):  
Industrial Plant ◽  
Production Rules ◽  
Design Environment ◽  
Plant Layout ◽  
Industrial Plants ◽  
Major Function ◽  
Cad System ◽  
Constraint Checking ◽  
Data Updating ◽  
Interactive User

Abstract This paper describes an industrial plant layout system with an intelligent interactive user-interface. This system offers a powerful design environment, in which a designer can concurrently draw and check a layout plan, which can not be realized on a conventional plant layout CAD system. The major function of the system is the automatic constraint checking of each designer’s drafting action. This function is achieved by the integration of a geometric modeler, frame representation, and production rules. The geometric modeler is used for extracting the information for data updating and constraint checking from graphical objects, which are directly manipulated by a designer. Frame representation is used for representing the attributes of the equipments and the areas, and these attributes are handled by production rules. Production rules are used for representing the constraint checking and data updating procedures, and can be executed as required.

scholarly journals The development of small settlements in the industrial plant - city model - based on the examples of Nowa Dęba and Nowa Sarzyna

2018 ◽  
Vol 45 ◽  
pp. 00079 ◽  
Author(s):  
Anna Sikora
Keyword(s):  
Industrial Plant ◽  
Urban Centers ◽  
Small Cities ◽  
Industrial Facilities ◽  
Industrial Plants ◽  
Spatial Changes ◽  
City Model ◽  
Post War ◽  
Time Specific ◽  
Over Time

Double-purpose industrial plant-settlement complexes (city) are fairly popular urban combinations; especially so during the inter-war and post-war industrial periods, when through a decision by the central authorities, industrial facilities were located in specific areas which were then developed over time. Specific cases of such complexes are two small cities built from scratch around growing industrial plants. The article presents certain functional and spatial changes in two urban centers: Nowa Dęba and Nowa Sarzyna, which are located in the Subcarpathian Voivodeship.

scholarly journals Bifurcation Approach to Condition Monitoring: Application to Pulse Energy Conversion Systems

OPSEARCH ◽  
2002 ◽  
Vol 39 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Yuri V. Kolokolov ◽  
Stanislav L. Koschinsky ◽  
Kondo H. Adjallah
Keyword(s):  
Energy Conversion ◽  
Condition Monitoring ◽  
Pulse Energy ◽  
Energy Conversion Systems ◽  
Monitoring Application

Concordia Transform-Based Current Analysis for Induction Motor Diagnosis

2013 ◽  
Vol 569-570 ◽  
pp. 481-488
Author(s):  
Jin Jiang Wang ◽  
Robert X. Gao ◽  
Ru Qiang Yan
Keyword(s):  
Induction Motor ◽  
Instantaneous Frequency ◽  
Low Cost ◽  
Experimental Studies ◽  
Current Analysis ◽  
New Approach ◽  
Non Invasive ◽  
Bearing Defects ◽  
Bearing Defect ◽  
Three Phase

This paper presents a new approach for bearing defect diagnosis in induction motor by taking advantage of three-phase stator current analysis based on Concordia transform. The current signature caused by bearing defect is firstly analyzed using an analytic model. Concordia transform is performed to extract the instantaneous frequency based on phase demodulation. The bearing defect feature is then identified via spectrum analysis of the variation of current instantaneous frequency. Both simulation and experimental studies are performed to demonstrate the effectiveness of proposed method in identifying bearing defects. The method is inherently low cost, non-invasive, and computational efficient, making it a good candidate for various applications.

EFFECTS OF OIL POLLUTION ON INDUSTRIAL WATER INTAKES1

1989 ◽  
Vol 1989 (1) ◽  
pp. 473-478
Author(s):  
J. A. Nichols ◽  
H. D. Parker
Keyword(s):  
Coastal Waters ◽  
Oil Spills ◽  
Oil Pollution ◽  
Industrial Plant ◽  
Industrial Plants ◽  
Power Stations ◽  
Different Types ◽  
Flash Distillation ◽  
Desalination Plants ◽  
The Impact

ABSTRACT Oil spills in coastal waters sometimes give rise to concerns that oil may become entrained in the seawater intakes of power stations, desalination units, and other industrial plants. This paper reviews the findings of an investigation, undertaken by the International Tanker Owners Pollution Federation and Sir M. MacDonald & Partners, on the effects of oil pollution on water-cooled electricity-generating stations and desalination plants using multistage flash distillation and reverse osmosis. The various components that could be contaminated by oil are described and, using case studies wherever possible, the effects on equipment, heat transfer surfaces, and potable water are discussed. Finally considered are various methods of minimizing the impact of oil and financial implications of oil contamination for the different types of industrial plant.

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