Continuous Real Time Monitoring

[JTMcQ]

Our vibration analysis program is less than a year old, abut one of our goals is to implement some form of real time, or semi-real time monitoring of one line as an implementation test. Do any of you have advice in this area? What are the comparisons between the available commercial technologies? What are the advantages/disadvantages to setting up this program in-house? If there are previous threads on this topic, I'd appreciate a link, and links to other websites would be also appreciated.

 

[alexit]

Depending on your program goals, here is a page with many links:

http://www.plant-maintenance.com/maintenance_articles_vibration.shtml

We use analysis of data taken beginning of each shift to confirm operator setup is correct (balanced tooling etc.) and to collect machine "quality" data. This is not any indication of machine approaching failure for us (when tolerance exceed 0.010mm we must rebuild, but know if we keep vibration low machinery last longer before rebuild needed.

 

[dgallagher]

A vibration transmitter based on-line system can be very cost effective and interface to your existing distributive control system and network. When anomolies are identified, follow up with your existing portable analyzer.

http://www.stiweb.com/proddata/cmcpHMI.htm

http://www.stiweb.com/proddata/cmcp500sample.htm

 

[JTMcQ]

Thanks for your input, I'll give these sites a look.

 

[MachineryWatch]

I have some experience applying continuous vibration monitoring systems to a variety of applications. Sometimes the previously mentioned vibration transmitter works well. It has to be a case where the vibration you are trying to "spot" influences the "overall" vibration level significantly enough that it produces a change in the trend or triggers an alarm (whichever you prefer). There are also ways to tune these transmitter systems to specific frequency ranges by using filters or selecting between vibration amplitude parameters (displacement, velocity and acceleration).

MAARS Inc. in Knoxville, TN (

http://www.maars.com)

makes a very versatile system that continuously acquires data on all channels, allows you to "band" specific frequency ranges of interest to observe trends and set alarms. The other parameters (in addition to amplitude) can also be trended and have alarms applied, like phase, Crest Factor, machine speed, Bias voltage, etc. The system can be equipped with both input and output relays for data acquisition triggering and alarm annunciation. It is extremely flexible and reliable. It can alarm on waveform parameters of peak values, RMS values or peak-peak values, as well depending on your application. All this flexibility is great for applications where you are trying to detect some process anomaly which influences product quality.

http://www.machinerywatch.com