How to measure vibration frequency with NI 9230 BNC?

[Robin90]

Hi there!

with NI-max it was easy to see the Vibration sensor readings live in a diagram. The vibrations i create with a vibration generator are between 20 to 2000 Hz. I would like to measure and show the actual frequency of the vibration sensor in Labview ( more or less like an oscilloscope). How can i do that?

[GerdW]

Hi Robin,

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@Robin90 wrote:

I would like to measure and show the actual frequency of the vibration sensor in Labview ( more or less like an oscilloscope). How can i do that?

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Well, a typical scope doesn't show the frequency of a signal…

You can use DAQmx function to read your signal and FFT functions to determine the frequencies/spectrum…

LabVIEW comes with a huge example library: what have you tried and where are you stuck?

[Henrik_Volkers]

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@GerdW wrote:

Hi Robin,

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@Robin90 wrote:

I would like to measure and show the actual frequency of the vibration sensor in Labview ( more or less like an oscilloscope). How can i do that?

---

Well, a typical scope doesn't show the frequency of a signal…

You can use DAQmx function to read your signal and FFT functions to determine the frequencies/spectrum…

LabVIEW comes with a huge example library: what have you tried and where are you stuck?

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Gerd, typical scopes, even the cheapest,  can measure and display the frequency today. 😄

(unless you look for a second hand boat anchor) 

Robin, start with the examples (Help...Find examples) ..  add a extract single tone information vi (signal processing/ wfrm measure) with an indicator for the frequency

bonus add-on: after you know the frequency, you can scale the diagram to show the number of periodes you like 🙂

(just like the auto-set funktion on the scope 😉

[Robin90]

Hi Henrik,

thank you for your reply.

I added the single tone info.vi to my NI daq max.vi. But i have problems to connect the Vibration sensor data from DAQ to the input of "Extract single tone Information.vi" . The Data i get is a 1D-Array of Waveform(double) which should be fine but many errors accure.

Maybe someone can help? Main.vi attached.

kind regards

Robin

[GerdW]

Hi Henrik,

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@Henrik_Volkers wrote:

Gerd, typical scopes, even the cheapest,  can measure and display the frequency today. 😄

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Well, I know.

My point is: when you switch on a typical scope then it will display a signal over time.

You need to configure the scope to also measure/display frequencies/spectrum - and the OP also needs to measure a signal over time and calculate the spectrum afterwards...

[santo_13]

Try the DSA soft front panel - https://www.ni.com/en/support/downloads/drivers/download.dsa-soft-front-panels.html#479535

https://forums.ni.com/t5/NI-Labs-Toolkits/Dynamic-Signal-Analysis-HW-Soft-Front-Panels/ta-p/3497079

These are designed with sound and vibration measurement in mind and come with an FFT display.