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Vibration analysts can use several tools for fault analysis within the Web Platform. One of the main ones is the Spectral Envelope, useful for identifying high frequency faults through signal demodulation.

When accessing a spectrum in the Web Platform, the screen includes a button in the upper right corner of the screen to request an envelope (demodulation) of the signal.
 

Figure: Spectral Envelope Selection Button

By clicking the button ““, a window will be displayed asking for the frequency range in which you want to apply the envelope. The Web Platform has predefined envelope values, parameterized by the most common frequency ranges in vibration analysis. However, it is also possible to define a custom envelope in the same window. Simply select the “Customizable” option and define the desired frequency range.

 

Figure: Customizable envelope configuration

After selecting the frequency range, the envelopes (spectral and waveform) will be available at the top of the page. Both have the same functionalities as the spectral analysis.

Figure: Spectral envelope with filter from 3500 to 4300 Hz, pointing BPFO bearing failure (dark mode of the Web Platform activated, for better contrast)

Autocorrelation is an analysis in the time domain that correlates waveforms with themselves to calculate a correlation factor at each time instant. It can be useful in helping the vibration analyst identify periodic frequencies, improving visualization and also, analogous to the previous section, allowing it to be displayed in its circular form.
To activate the waveform autocorrelation plot, simply, in the desired spectral screen, activate the option “” located in the upper part of the screen.
 

Figure: Activation of autocorrelation

The graph will be displayed just above the spectrum. The same tools available for the standart waveform are also available.
 

The waterfall is a three-dimensional graph where up to 10 spectra of a monitoring point are displayed, helping the analyst to identify fault trends from the growth of vibration amplitudes. 
It can be accessed via the Cascade button present at the top of the “Spot Viewer” and “Spectral” pages.
 

In the window that will be displayed, you must select which spectra will be used to form the cascade. The available filters are: date of spectra, settings (it is necessary that all spectra have the same frequency settings, monitored axes and duration) and acceleration threshold. The acceleration threshold filters spectra whose RMS acceleration is below a user-defined value, in order to only use graphs generated while the machine is running.
With the filters set, simply select the spectra to be used by clicking on the “” ssymbol to the right of each spectrum listed at the bottom of the window and then clicking ““.
 

Figure: Selection of Spectra to build the waterfall

• CTRL + Click + mouse movement: lateral movement;
• Click + mouse movement: rotation;
• Scroll mouse button: zoom in or out (graphic).

In addition, the “” button allows you to change the spectra used to generate the graph.

Figure: Spectral cascade visualization tools

In addition to spectral comparison using a reference spectrum, it is also possible to view two vibration spectra side by side, making it easy to compare vibration spectra collected some time ago at the same spot, and even between different spots.

This option is available to the user on the spectral screen, using the “” button on the upper right of the screen.
 

Clicking on this button will display a window showing the spectra available for side-by-side comparison.


To select a spectral window, click on the “” button, displayed right next to the window and confirm the selection by clicking on ““. To find the desired spectrum more easily, you can search by machine name, Spot, or sensor number.
 

Figure: Filter to choose spectral of comparison
 

Figure: Waveform spectral comparison 
 

The integrated Dashboard, available in the side menu of the Platform (figure bellow) takes into account both the predictive module (vibration and temperature monitoring) and the sensitive module (DynaSens) that has checklists and inspection routes.

This part of the Web Platform is divided into two sections:
▪ Health indicators
▪ Reports
 

Figure: Integrated Dashboard

The Machine Viewer is a tool for viewing information about the company’s machines, joining information from the sensitive and predictive modules. There are two ways to access the functionality: through the side menu, in the “Machines” option, or by clicking on the desired machine through the asset tree. This screen encompasses all information relating to a particular machine in the plant, grouping Subassemblies, Components and Spots common to it.

Applicable information and filters

The top of the Machine Viewer shows the path within the asset tree where this machine is located, a table with machine information, and filters for Subsets and Components. If any of these filters are applied, the information shown in the rest of the screen will refer only to the filtered items. In addition, you must define the starting instant and the number of revolutions displayed in the graph.
 

Picture: Machine’s timeline.

Figure: Reduced version of the DMA Dashboard on the machine screen

Picture: Anomalies – Sensitive Module

As in the other features on this screen of the Platform, the information displayed follows the pattern according to the time period chosen on the machine timeline.

Manual Measurements

Also belonging to the sensitive module, below the “Anomalies” field, a graph is displayed with the results of the manual measurements performed on the routes of the sensitive module. To select which magnitudes will be displayed in the graph, simply click on the “” option and select the desired magnitude.
 

Picture: Manual Measurement Graphs – Sensitive Module

Figure: Predictive Analyses performed on the machine, per monitoring point

To make new reports, the user simply selects the icon “” and selects which Spots will be analyzed.

The “Reports” division, present in the Integrated Dashboard, presents all the reports (predictive and sensitive) issued by the system users.
 

Regarding the columns shown:

• Status: shows how critical the report performed by the user is.
  • Red: intervention required;
  • Yellow: alert condition;
  • Green: no problems found.

▪ Resolution: presents information about the treatment given to the report.

• Open: the report was issued, but no corrective action was registered for the report;
• In progress: a corrective action for the reported problem is in progress;
• Resolved: the reported problem was corrected through some action / action of the team. By clicking on the line of the generated report, you can check what action was taken, if the user who changed the status has filled in details of the action.

▪ Location in the asset tree: points to where the Spot or machine belongs within the company’s hierarchical structure.

▪ Diagnosis: informs the diagnosis filled in by the user for the failure found.

▪ Detected Failure: informs which failure category was filled in by the user who created the report.

▪ Type: This screen shows predictive and sensitive reports. The “type” option indicates the origin of each report.

▪ User: information about which user filled out each report. Hovering the mouse shows the user’s name and e-mail.

▪ Deadline: filled in by the user in the report itself, represents the deadline for the action recommended by the report creator.

▪ Creation date: date on which the report was created.

In addition, if any of the reports have undergone changes, the “” symbol (placed on the far right of the line of the modified report) will allow you to check which information has changed and by which users. By clicking on this symbol, a new tab will be displayed showing the changes.

Picture: Historical changes in performed report 

The Health Indicators, within the Integrated Dashboard, display the health indices of different plants or work areas of the company. Each is represented by a pie chart indicating the health of the assets in the area, based on the number of Spots and inspection routes that triggered A1 or A2 alerts.
 

Picture: Health indices by sectors or plants

In this same screen, you can click on the side arrows in each pie chart so that, within the organization of the asset tree, a new Dashboard is generated with the sublevels and machines related to the selected one. In this way, it is possible to perform an integrated and specific visualization of all areas and sub-areas of the plant.
The purpose of this screen is to show which areas need more attention from the maintenance or reliability team, i.e., which of them are theoretically in more compromised health and are impacting the overall health levels.

The analysis of the data collected by DynaLoggers can be done in several ways through the Web Platform. The Predictive Analysis tab has as main goal to enable the elaboration of technical reports about failures, alerts or recommendations regarding the health of the monitored asset. The Predictive Analysis section is found at the end of the “Spot Viewer” and “Machine Viewer” pages.

Performing Predictive Analysis

To make a technical report of a Spot, just access the section through the Spot Viewer (at the bottom of the page) and select the “” option.

A new screen will be shown, requesting Spot analysis information:
 

The information tab has the following fields:

• Status: selection of the current asset condition. Three options are available to inform the severity of the report;
• Diagnosis: brief description of the problem encountered by the analyst;
• Detected failure: selection of the failure found at the point among a series of categories;
• Recommended action: indication of which actions should be taken based on the analysis performed;
• Note: addition of infos that have not yet been cited;
• Date on which the failure was detected: optional info to register from which moment the failure could be identified; 
• Deadline for Action: add deadline for action based on the “recommended action”.

The Spot Viewer tab, on the other hand, brings the graphs referring to the history of the analyzed spot data, with the objective of providing background for the analyst when making his report. It is possible to add temperature, acceleration, and speed graphics with customized time periods. It is also possible to add an explanatory comment below the graph.

Picture: Data history tab available when creating a predictive analysis

The “Spectral Analysis” tab allows the addition of spectra that prove the detected failure. The selected spectra will be part of the report.

Picture: Adding spectra where failures are identifiable

Finally, the “Images” tab allows the user to add pictures to the report. By selecting the “Add Image” option, files saved on the user’s computer can be added and will become part of the report.

Picture: Adding images to the predictive report

Predictive Analysis Visualization

The predictive analysis performed are available for viewing and access in several ways, as presented below. To access the full version of the report, click on the report icons in any of the options listed below.

1. In the Spot viewer screen (data history): at the bottom of the screen, below the RMS acceleration graph.
 

2. In the timeline of the Spot Viewer screen: to access the complete report, simply click on the icon in the timeline.
 

Picture: Column for viewing reports from the DMA

Predictive Analysis for multiple monitoring points

In the Machine Viewer screen, it is possible to perform technical reports for more than one monitoring point simultaneously. At the bottom of the page, you will find the option ““.

Picture: Option to issue report by machine 
 

Picture: Predictive Analysis for Multiple Spots
 

When the list of Spots for the machine appears, simply select, in the rightmost column, which ones will be added to the analysis using the “” button. Going forward, the diagnostics, the appointed failure, status, and recommended action options will be the same as those already present in the Predictive Analysis for just one monitoring point, detailed in the previous section.
When performing a batch predictive analysis, as in this case, the selected Spots will inherit the report, which will be available through the options listed in this section.