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Sensor for RPM meter?

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Elits

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motor dc 10.000 rpm indonesia

Hi all
i've got task to measure RPM for motor dc. the motor has RPM about 10.000 RPM. What kind of sensor i can use? optocoupler or Photodiode or hall effect sensor? to measure high speed RPM?Why?

Thanks
Regards,

Elits
 

Go for IR photointerrupters ..

Here are examples:

http://www.paralight.us/uploads/pdf/C01~C09(2001-7-20%E6%9B%B4%E6%96%B0).pdf

As far as speed is concerned they have rise/fall time of ≈15µs ..

All what you need to do is to mount a disk on the motor's shaft and drill/cut one or more holes ..

Regards,
IanP
 

But if we are not allowed to add anything, or there is no room for adding things, so how about the solution? I also concern this matter.

And 10000rpm is a very high speed, I have never seen a such high speed motor, or do you just mention about the full scale of your meter?

nguyennam
 
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