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Tachometer

mechanicalquery

Jan 11, 2014
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Jan 11, 2014
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This may be straightforward, but I want a tachometer that I would use to measure the speed of a rotating shaft and have it read it out on my computer. Are these things pretty standard or would I have to build one? Most of the tachometers I've found have their own digital LCD display.
 

Harald Kapp

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Nov 17, 2011
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There are several ways of measurig the rotational speed of a shaft:
- magnet and hall sensor
- optoelectronically (e.g. reflex light barrier)
- electromechanically (tachometer generator)
- ultrasound

Each type of sensor will need additional signal conditioning to generate a signal that can be read by a computerI take it you don't want to count pulses and compute the rpm from that, you will want to read the rpm as a digital number using a computer's communication port (USB, serial...)?

You want to buy a unit or are you willing to build one yourself?.
 

jcurrie

Feb 22, 2011
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Feb 22, 2011
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the mine i worked at used the magnet and hall effect the readings here sent to a interface by land line then displayed on a computer screen.
jc
 

Arouse1973

Adam
Dec 18, 2013
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Reflex light barrier might be a limitation, they might not be able to have everything in one package. I would go for what we call a break beam. Or as mentioned hall effect or personal favourite reed switch. Simple.
Adam
 
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