frequency analysis on vibraiton signals

[bon2b]

I'm measuring vibration signal and analysis frequency of the signal using the following setup:

• measurement device: NI9234 on  cDAQ9172 chassis
• measurement software: LabView SignalExpress 2009 with Sound and Vibration Suite
• accelerometer: ADXL330

Even though I could see a clear vibration signal in time domain measurement as shown in the attached screenshot, I could not locate this signal's frequency in my analysis step(Power Spectrum step). All I could see in the power spectrum is the DC component at 0Hz. Anybody has a clue on I I could do to find the frequency at which the vibration happens? Any input is appreciated!

Thanks a lot!

[Ali M]

Hello bon2b,

Since this is a duplicate post, please refer to the following thread for further assistance. Posting to one location on a single issue helps us as well as the forum community to better assist you. Thank you.

Best regards,

Ali M

Applications Engineer

National Instruments

www.ni.com/support