arup
Member level 2

Hi,
I would like to measure speed of generator using magnetic pickup. Range of speed is 300 rpm to 3500 rpm and min AC voltage would be 0.5V.Hence I have to interface magnetic pickup sensor with microcontroller. In this regard I require few i/ps :
a) As the speed changes does the o/p of magnetic pickup changes in amplitude or in frequency.To find out the rpm should I count the pulse or measure the amplitude of the signal.
To my understanding it should be function of frequency.Correct if it’s wrong.
Speed = 60 X Hz (to be measured) / No of Rotor Teeth
b) The signal o/p of mag pickup sensor would be sinusoidal with 50 % duty cycle ??
c) suggest a interfacing circuit with micro.
Regds,
I would like to measure speed of generator using magnetic pickup. Range of speed is 300 rpm to 3500 rpm and min AC voltage would be 0.5V.Hence I have to interface magnetic pickup sensor with microcontroller. In this regard I require few i/ps :
a) As the speed changes does the o/p of magnetic pickup changes in amplitude or in frequency.To find out the rpm should I count the pulse or measure the amplitude of the signal.
To my understanding it should be function of frequency.Correct if it’s wrong.
Speed = 60 X Hz (to be measured) / No of Rotor Teeth
b) The signal o/p of mag pickup sensor would be sinusoidal with 50 % duty cycle ??
c) suggest a interfacing circuit with micro.
Regds,