The usb-9233 is used for the signal acquisition of IEPE sensor to test the maximum velocity of the vibration. A vi is built to analyze the sampled signal: 1. Add a Hanning window 2. Make a FFT 3. Extract “r” from polar form (r*e^ (i*θ)) of the complex the question is: the magnitude of the original signal is needed to express the acceleration of the vibration, but I don’t know how I can get the magnitude of the original signal for the value of “r”.is there someone helping me to figure out this question,and give the relationship between the magnitude and the value”r”,thank you very much!
the "program in labview .jpg"is attached.
Message Edited by kinven on 11-26-2008 02:24 AM
