OROS always strives to be closer to its users and is carefully listening to needs and requests. This is why OROS is regularly releasing new version. Customers under contract automatically benefit from each release.

The NVGate® 2021 major version is available from january 2021. This release of the OROS 3-Series analyzer’s software platform brings additional functionalities and brings significative performance improvements.

This release note describes the content of version, with operating details.

Compatibility: NVGate 2021 is compatible with all OROS instruments that have not been discontinued. Depending on the hardware options and version, some instrument features may or may not be available.

Filter builder

New prototype filters

In addition to the Butterworth filter, now you can build the IIR filters with the Chebyshev type I (band-pass ripple) filter or Chebyshev type II (stop-band ripple) filter.

The Butterworth filter has flat response in both the pass band and stop band, but its transition band is wide.

The Chebyshev type I (band-pass ripple filter) has the steepest roll-off among the three filters, and its response in the stop band is flat. However, it has ripples in the pass band.

The Chebyshev type II (stop-band ripple) filter has flat response in the pass band, but it has ripples in the stop band. Its transition band is narrower than the Butterworth filter, but wider than the Chebyshev type I.

Below is an example showing these three filters with the same filter order.

Increased filter order

The order of the filter affects the steepness of its roll-off. The higher the order is, the sharper the transition between the pass band and the stop band is. An example demonstrating the impact of the filter order is shown below.

For the high pass and low pass filters, the filter order can be selected from 1 to 40 in the Office mode, and from 1 to 10 in the Connected mode now. In the previous NVGate version, the maximum filter order was 6.

For the band pass and band stop filters, the filter order is 2*N, and N can be selected from 1 to 30 in the Office mode, and between 1 to 10 in the Connected mode now. In the previous NVGate version, the maximum value of N was 5.

Relaxed constraints on the cut-off frequency

To guarantee the stability of the filter, there are certain constraints on the value of the cut-off frequency. Compared with previous version of NVGate, such constraints are relaxed significantly now.

For the high pass and low pass filters, the maximum value of the cut-off frequency is the input frequency range FR. The minimum value is FR / 50000 in the Office mode, and FR / 40000 in the Connected mode. In the previous NVGate version, the minimum value was FR / 40 for the low pass filter, and FR / 400 for the high pass filter.

For the band pass and band stop filters, the low cut-off frequency f_low and the high cut-off frequency f_high need to meet the following conditions in the Office mode:

f_low ≥ 0.0001 * FR

f_high ≤ FR

0.0004 * FR ≤ f_high - f_low ≤ 0.9998 * FR

And in the Connected mode, the conditions are as below:

f_low ≥ 0.0005 * FR

f_high ≤ FR

0.000675 * FR ≤ f_high - f_low ≤ 0.99 * FR

In the previous NVGate version, the conditions on the cut-off frequencies were:

f_low ≥ 0.055 * FR

f_high ≤ FR

0.0075 * FR ≤ f_high - f_low ≤ 0.99 * FR

Improved precision

Now, the filters are calculated in 64-bit floating point format in the Office mode, and in 40-bit floating point format in the Connected mode. In the previous NVGate version, the 32-bit floating point format was used in both modes.

Octave overall no limitation

1/n Octave Overall levels frequency range plug-in are now editable. You can define the min and max. This overall is computed in the time domain (weighting filter and detector). Processing weighting in the time domain provides accurate measurement for non-stationary signals (impulsive).

Full range mode computes the overall on the whole frequency range excluding the DC component. (The minimum range is defined by "CPB filters Lower central frequency"/5). Limited range lets the user define the range by changing the low cut off frequency and high cut off frequency.

Application

global level with filter

remove noise from spectrum

Listen signal with filter

Kinematik marker

kinematik marker follows FFT Tachometer

The Kinematik marker can now be associated to the speed of the tachometer. So during a Run up the kinematik marker will automatically move inside FFT spectrum in function of the speed.

How to use it : Select a Tachometer on FFT tab from GoToResult page.

Then display a FFT spectrum. Select a kinematik marker and put it on the windows.

Now this marker will be linked to the FFT speed.

Then on properties, you can link (or not) this marker to the speed.

Database included on install

Now the excel kinematik database including bearings from NSK, SKF, FAG, SNRn, GMN, INA, RHP is installed automatically.

You can find it in the installation folder: "NVGate Data\Markers\Kinematic\"

Direct access to database

When clicking on the "open folder" button, you will directly access to the folder where the Excel kinematik database is stored. So you can now edit the database easily if you need to add the kinematic configuration of a rotating machine.

Documentation

All the documentation and help have been completely renewed. We have put an online wiki-based documentation with videos, manual, application notes, download.

This page is in free access and can be consulted here: https://wiki.oros.com/wiki/index.php/Home

Wiki

On line mode

We advice to be connected to internet to enjoy the new documentation page.

So if you are connected to Internet, now the following button will bring you to the NVGate wiki page.

https://wiki.oros.com/wiki/index.php/NVGate

Be aware than this wiki page have a powerful research button if you need to search any setting.

If you are using NVGate in another language than english, the wikipage will be opened with /XX at the end (XX correspond to the unicode language.

For example if you are using NVGate in japanese, the help will bring you to the page: https://wiki.oros.com/wiki/index.php/NVGate/ja (==> ja is the internation japanese code)

Off line mode

If you are not connected to internet, we will open the NVGate.pdf manual which is in the folder "Manuals" in the installation directory of NVGate.

Video

Oros have launched a youtube channel here :

OROS Youtube channels page

We have included tutorial videos on this wiki, to help you to use the OROS software.

DC simulated

The DC simulated allow you to inject up to 32 external DC channels in NVGate from external source (exemple : GPS, weather station, external can bus...). The frequency sampling is up to 15 sample / seconds. Thanks to the python developer toolkit, a developer can easily develop an interface to inject the value inside NVGate. The GPS and weather station below have been develop using the DC simulated.

This option is include with the reference ORNV-VI-DC (wich also include the Virtual input).

How to use:

on acquisiton Tab, select connect input, select the DC inputs and select the DC simulated channels.

This channels can be activate and be put inside recorder and/or waterfall like any other DC channels.

The settings Value (wich can be controlled by an external software) will change the value of the inputs.

The others DC simulated settings details are explain on the front end settings page.

GPS

Thnaks to the "DC simulated channels" we have create an Add-on for record a GPS.

The gps have the following features

Record the X-Y GPS coordinates.
Record and display the speed profile.
Use the speed profile as a waterfall reference .
Creat a .gpx and Display it on an internet website if you have Internet connection).

You can visit the dedicated page to download it and advanced configuration. : https://wiki.oros.com/wiki/index.php/NVGate_DC_Simulated_Manager

We have 2 ways to acquire the GPS position, android phone or GPS Compliant with NMEA 0183 standard.

Serial GPGGA GPS

We are compatible with GPS USB Serial Interface Compliant with NMEA 0183 standard GPGGA

We can advice the GPS USB Navilock NL-602U but other GPS will work.

Android GPS

GPS data can also be retrieved using Android ADB (Android Debug Bridge). If you plug your android phone, we can inject the GPS position inside NVGate.

How to used

Once the gps is plugged and configured, click on inject data, this will put the value on the DC simulated inputs.

Then you can use these channels on NVGate.

If you need to record the data. click on connect input, go on DC input tab, then drag and drop the DC simulated channels on recorder.

If you have record the data you will be able to create a .gpx file

Creating and visualize .gpx file

We can create a .gpx from an .oxf (OROS) signal file. a .gpx is gps file to follow the

You need to click on Convertsignaltogpx.

This will open the windows below.

Select the signal file than you need to convert and click on load data. You can modify the channels if needed. Click on create .gpx. The .gpx will be put on the folder "attachement" of the NVGate project.

If you want to visualize the .gpx we advice to use the website : https://www.gpsvisualizer.com/ Clicking on "Click here to visualize the .gpx on a website" opens an website allowing you to plot the gpx on a map.

Weather station

Precipitation, wind speed/direction, pressure, temperature, pressure can prejudice sound pressure levels or need to be record when you are doing sound measurement.

Thnaks to the DC simulated channels, we can now enter manually the value or we can connect a weather station to NVGate.

Manual

The user can enter manually the weather value.

Davis instruments weather station

You need the 3 elements to make it work

- 6322OV Wireless Vantage Pro2 Integrated Sensor Suite

- 6316 Wireless Envoy

- 6510USB WeatherLink Data Logger.

This weather station provide Accurate, reliable weather monitoring with real-time data updates every 2.5 seconds. Sensor suite includes outside temperature and humidity sensors in a passive radiation shield; wind speed and direction; and rainfall.

Note : The weather Station need to pass by OROS SA for configuration.

Other weather statio

Please contact OROS to check the posibility to import the data. (paid service)

miscellaneous

DC Dynamical sensor y = ax+b calibration

It is now possible to calibrate a dynamical sensor in "DC" or "DC floating" coupling using 2 values, then the software will automatically compute sensitivity and offset to obtaine the "y = ax + b" formula.

This function is practical for 4-20 mA sensors or “quasi-static” sensors acquired on dynamic channels. wire sensor displacement sensor calibrated with a rule, pressure sensor with a calibrated compressor, proximity probe calibrated with a micrometer.

For using it, first create a DC sensor on the sensor database. Then apply this sensor to a channels.

Now on the calibration part, you can calibrate it using 2 values. Then the software will automatically and apply the sensitivity and offset.

Remove a sensor from history

If you have done a mistake during a sensor calibration, you can now delete a value from calbration sensor historic.

You need to ho on historic , select the sensor, select the value that you need to delete , then click on remove.

Displaying Time in Zoomed signal

NVdrive : SetViewmeterLevels

Using NVdrive, you can now control and set the alarm level, high level and low level.

Check the NVDrive toolkit for more info.

Add on : Human body vibration

The OROS Body Vibration tool allow you to evaluate the affect of vibration on the human body according to standards ISO 2651 and ISO 5349. These standard define measurement practice and vibration signal analysis to evaluate the affect on health and and comfort of environmental and equipment vibrations on the Human body.

The ISO 2651 describe the affect on health and comfort of vibration on the whole-body in transportation system, and the ISO 5349 the affect on health of vibration on hands and arms when manipulating machine-tools or vibrating objects.

This is a post analysis toolkit, operating after the recording of the signal. it will calculate time-weighted signal of acceleration and specific indicators both defined in the standards.

Standards compatible: international standards about whole/body vibration including: ISO 5349, ISO 8041, ISO 2631-1 and ISO 2631-5.

Whle/body Vibration Indicatiors include : VDV, MSDV, MTVV, Weighted raw, al(ISO 2631-5), D(ISO 2631-5) are available. RMS, Peak, Crest, peak-Peak, are also available in NVGate plug in.

*Body vibration indicators*
$MTVV$	Maximum Transient Vibration Value, represent the maximal RMS value of the signal
$VDV$	Vibration Dose Value, taking into account the temporal shocks in the signal
$MSDV$	Motion Sickness Dose Value, representing the comfort in transportation measurement
$D_{k}$	The Acceleration Dose, representing the affect of the vibration on the spine
$A_{w}$	Daily maximal exposure value (Calculated from Post processing in NVGate)
$Peak$	Amplitude Peak of the vibration; maximal amplitude of the signal from the 0 (Calculated from Post processing in NVGate)
$Crestfactor$	Ratio between the Peak level and the RMS of the weighted signal(Calculated from Post processing in NVGate)

Signal fitering including:

*Time-weighting filters*
$W_{k}$	Time weighting for the Z axis for whole-body measurement (ISO 2651-1)
$W_{d}$	Time weighting for the X and Y axis for whole-body measurement (ISO 2651-1)
$W_{h}$	Time weighting for the hand-arms measurement in any direction (ISO 5349-1)
$W_{f}$	Time weighting for motion sickness measurement in the vertical direction (ISO 2651-1)
$W_{c}$	Time weighting for the X axis for whole-body measurement (ISO 2651-1)
$W_{e}$	Time weighting for all rotational directions for whole-body measurement (ISO 2651-1)
$W_{j}$	Time weighting for the Z axis for head comfort measurement (ISO 2651-1)

How to use : https://wiki.oros.com/wiki/index.php/Human_Vibration

This Add-on is free of charge for NVGate 2021 users. and TDA (?)

Orbit display include on FFT diag or ORD diag

For customer with option FFT-Diag or ORD-Diag , they will now have the Orbit display available in NVGate.

The orbit is available using the add/remove windows.

For more details, please check the orbit dipslay page.

Bug fixing

13728: [Fractional Tachometer] Using a fractional tachometer lead to DSP error -
13729: [Drec] : Impossible to record more than 38 ch in Drec
13672: Detal RPM with source DC tach (from monitor) - do not trig the waterfall
10572: Low pass response for ICP and AC coupling poorly specified
13811: NVDrive GetResultEx error while running without displaying result
13774: Orbit display improvement
13790: Change the number of displayed orbits
13794: A problem of DRPM stop at 5000 RPM instead of 6000.
13953: [General] A-weighting can be applied several times (report 13912)
13938: Input type: Xpod bridge, one channel 5 doesn't work if 1 activated
13767: Create a new unit : do not go on a "empty" windows, keep the previous configuration.