Time Domain Analysis (TDA) DATASHEET
DATASHEET
Time Domain Analysis
A NVGate® plug-in for OROS 3-Series analyzers
Introduction
Noise and vibration analyzers are the perfect tool for
machinery diagnostics and maintenance. Working like a
stethoscope, the dynamic signal analysis extracts the
frequencies corresponding to the mechanical behaviors with
the help of the FFT, 1/n Octave or Synchronous Order analysis
techniques. The spectral distribution of such noises and
vibrations are essential to identify the vibrations components
constituting the machinery (and its defaults) signature.
In addition to the vibrations, defaults signatures like shocks
and clicks contain spikes which make their spectra
unreadable. Using only spectral techniques appears to be
insufficient for a correct diagnostics and predictive
maintenance on industrial machineries. The Time Domain
Analysis and monitoring reveals important indicators about the
machinery health and early degradation of the rotating parts.
OROS, the specialist of measurement systems for diagnostics
on rotating machinery, features the Time Domain Analysis
plug-in for the 3-Series analyzers range.
The TDA is a plug-in for NVGate®, the noise & vibration
software platform for 3-Series analyzers.
Industries
Applications
Machines
>
Energy & Process
>
Transmissions
>
Machinery fault diagnostic
>
Marine
>
Bearings
>
Predictive maintenance on bearing
>
Manufacturing
>
Gear boxes
>
Shock & transient phenomena analysis
>
Defense
>
Motors and Generators
>
Trend indicator collection
M002-089-2
1
Time Domain Analysis (TDA) DATASHEET
Table of Content
Introduction .............................................................................................................................................. 1
Table of Content ...................................................................................................................................... 2
Description ............................................................................................................................................... 3
TM
Time View
....................................................................................................................................... 3
Signal indicators ................................................................................................................................. 3
Main Features .......................................................................................................................................... 4
Specifications .......................................................................................................................................... 4
Ordering Information................................................................................................................................ 4
M002-089-2
2
Time Domain Analysis (TDA) DATASHEET
This TDA plug-in is designed to emphasize such details by its state-of-the-art signal processing and
display. The TDA plug-in is unequalled for monitoring the time domain during field measurement to
insure that the acquired signals are correct. This plug-in is also a major tool for fault detection with
signal indicators providing sharp information about the signal shape and type. The TDA plug-in is the
ideal complement of the FFT, FFTDiag and SOA (Synchronous Order Analysis) plug-ins for machinery
diagnostics and maintenance. Real-time and post-processing analysis of shocks and impacts have
never been so easy and clear with the Time Domain Analysis plug-in.
Description
The TDA is an optional plug-in for NVGate V6.00 and upper. It benefits
on the proven ergonomics and efficiency of NVGate’s software
components. This plug-in takes advantage of the real-time processing
capabilities of the 3-Series analyzers featuring immediately consistent
results. As an NVGate plug-in, it runs in parallel with all the others
plug-in offering a real flexibility to analyze the signals in all domains
simultaneously.
The TDA works on-line or from recorded signal files. It provides
simultaneously 2 type of results; the time view and the signal
indicators.
Time ViewTM
The Time View is an oscilloscope-like view of the time domain series
which scrolls the signal for a user-defined duration. The length of the
viewed signal is independent for each channel. That is to say it allows
monitoring the same signal on different time bases (e.g.: 1 h, 2 min
and 10 s).
The Time View embeds signal
indicators that can be extracted
from any user defined area. That
is useful for identifying the nature
of an RMS variation during a runup (e.g. differentiating resonances
or unbalanced shocks).
Signal indicators
Running totally in parallel with the Time View, the signal
indicators, DC, RMS, Skew, Kurtosis, peak, peak-to-peak
and crest factor are delivered on a sliding averaging or
repeated linear basis. These levels are available as view-meters or profiles. It is then easy to monitor
and record them for trend analysis or default detection. The view-meter can be gathered in common
windows. Alarms allows a fast visualization of critical levels reaching.
The profiles give an easy to read
overview of the signal indicators
evolution versus time or any available
reference like RPM, temperature or
torque. The Signal indicator can be a
reference itself, permitting investigation
graphs like the evolution of the kurtosis
(accident in the signal) versus the RMS level (the energy) of the vibrations themselves.
M002-089-2
3
Time Domain Analysis (TDA) DATASHEET
Main Features
Specifications
Time view: signal overview from ms to
>
8 or 32 channels plug-in
days.
>
Independent bandwidth from 1 Hz to 40 kHz
>
Independent filter on each channel
>
High/low pass, Stop/pass band, integrator
>
Extraction of signal indicators to view meter
(single & double) differentiator, filters.
and profiles
Independent on each channel
>
>
User defined time base for indicators
>
extraction
>
period.
Free run operation: continuous signal
>
monitoring out of acquisitions
>
Exponential, linear and repeated extraction
Signal indicators: DC, RMS, pk, pk to pk,
crest factor, skew and kurtosis.
Workable signal overview with signal
indicators.
>
Multi reference profiles: indicators vs. time,
RPM, other indicators
>
Real-time and off-line data processing.
>
100% ASB setup, easy automation with
macro, NVDrive® & sequences
Ordering Information
ORNV-TDA
Real-time & post-processing Time Domain Analysis plug-in analyzer
ORNV-FFT
Real-time & post-processing FFT plug-in analyzer
ORNV-FFTDIAG
Advanced diagnostic add-on for FFT plug-in analyzer
ORNV-ORD
Real-time & post-processing Synchronous Order plug-in analyzer
M002-089-2
4
Time Domain Analysis (TDA) DATASHEET
OROS, Leadership through Innovation
About Us
Now approaching 30-years in business, OROS’ designs and manufacturing have been renowned for providing the best in
noise and vibration analyzers as well as in specific application solutions.
Our Philosophy
Reliability and efficiency are our ambition everyday. We know you require the same for your measurement instruments:
comprehensive solutions providing performance and assurance, designed to fit the challenges of your demanding world.
Our Emphasis
Continuously paying attention to your needs, OROS collaborates with a network of proven scientific affiliates to offer the
latest of the technology, always based on innovation.
Worldwide Presence
OROS products are marketed in more than 35 countries, through our authorized network of representatives, offices and
accredited maintenance centers.
Want to know more?
OROS headquarters
OROS Inc
OROS French Sales Office
OROS GmbH
OROS China
M002-089-2
www.oros.com
www.orosinc.com
www.orosfrance.fr
www.oros-deutschland.com
www.oros.com
5