How to convert ir speed sensor output to rpm which can be feedback through dspace ds1104?

I am using an ir sensor for measuring the speed which is to be feedback through ds1104 to my simulink file. But I am getting a train of pulses but unable to convert it to rpm.so please help.

Answer 1

[Sivakumar Selvam]

Frequency of the pulse train is equal to the speed of the machine in RPS(Rotation per second). Dividing RPS/60=RPM. You need a frequency counter to measure the frequency of the pulse train in DS1104.

GOOD LUCK...

Answer 2

[Qaiser khan Bozdar]

Please try a resistor on output of ir speed sensor because i had also faced this.This type of problem are arised due to some kind of load variations, weather the voltages are not complete or there is something improper wiring in a practical circuit.