Linear Displacement sensor data to RPM

[sai321]

Hi guys i am attaching my VI here and i am trying to implement FFT analysis to check if i can get the frequency so that i can convert the frequency to RPM. Can someone please help me in implementing the logic so that i can get RPM 

[GerdW]

Hi sai,

just throw in just another ExpressVI! 😄

Which signal do you want to analyze?

If its one of those voltages: wouldn't it be easier to count pulses?

[Henrik_Volkers]

Capture at least 10~15 periodes of your frequency and use the tone detection vi. You get  the frequency and can calc the RPM according to the number of pulses per revolution.

This type of measurement is restricted to 'higher' RPMs..( rotor speed measured by a mic).. for lower RPMs a counter measurement like GerdW suggestion is the way to go.