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Frequently Asked Questions

Applications

Measurement

Navigation

Code

Other


Applications

Are there restrictions as to which equipment I can connect to my soundcard to use with Vibrotoolbox?
Yes. Connecting equipment is not just a matter of finding plugs that fit the jacks. Before making each connection, it is necessary to verify the manuals to make sure that voltage ranges and impedances match. You can easily produce unrecoverable damage to electronic equipment by making inappropriate connections. In addition, most soundcards filter out very low frequencies (< 20 Hz). Such type of i/o device will not be able to record DC signals, in which the output of the sensor is a steady signal.

Is it possible to damage equipment by using incorrect settings in Vibrotoolbox?
It depends on your setup. Vibrotoolbox will command the hardware. Problems can be avoided by not mixing components that can hurt each other in the same setup. When that is unavoidable, it is advisable to not use more than one setup with the same computer. That will reduce the chances of mixing the settings files employed in the setups. The risky element is output amplitude during calibration. Safety is provided by the Max. allow. ampl. (V) setting in Options: Calibration. That option sets the maximum amplitude in volts that the i/o device will be allowed to send out. This setting should also be kept within the range of operation of the equipment in the setup. This option must be always set because if the reference sensor does not work, the program perceives low input and it raises the output to try to reach the desired amplitude for calibration.

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Measurement

Are the reported amplitudes measured at the peak or rms?
All amplitudes refer to peak amplitude, except for the reference amplitude that the user enters when calibrating a signal in Tools: Calibrate sensor.

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Navigation

Why does a command line screen come up when I open VibroToolbox?
That screen displays code warnings and errors. When things do not work as they should, please paste the contents of the black screen into your bug report.

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Code

Where are the source files?
What language is used to write VibroToolbox?

VibroToolbox is developed in M-file scripts. These are implemented by Octave, Scilab (open, free) and Matlab (proprietary). The source files are in the script releases.

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Other

A feature in the help file seems to be missing from my version of VibroToolbox.
We are dealing with five types of releases that run on different libraries. It is not currently possible to have all features present and identical in all releases.

Will VibroToolbox′s script version run in free programs such as Octave or Scilab?
The math code should mostly work, but until the last time we tested it, the graphical interface support in such environments did not yet attend VibroToolbox well. We keep an eye on new developments and hope to be able to make VibroToolbox available on free math environments soon.

Can VibroToolbox coexist with Matlab installations?
Yes, there should be no problems.

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Copyright (c) 2011 Marcos Gridi-Papp.
All documentation licensed under the GNU FDL License.

 
Take a minute to visit SoundRuler, our twin project for acoustic analysis.

SoundRuler offers many options for interactive analysis and plotting of previously recorded signals.
 

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