digital pulses

[Dawe]

Hello��again

NOTHING seems to work for me, so here is another thing I´d like you friendly souls out there to help me with.
I have a small turbine (to measure breathing flow) that have a rotating range from 2 to 2500 rotations per minute. The rotor generates a digital puls every 180 degrees. To calculate the instantaneous flow I need to get the time between each puls. The digital puls is generated on ONE line from the sensor and I dont know if I´m supposed to plug this to a specific dig.line on my DAQ-1200 card in order to make it work.

I need help with:
1) how to detect thees pulses and how to get them into my PC
2) how to get the time between each puls
3) how to make it work for each breath over and over again.

Is there anyone who can recom
end or give me an example that do Anything like this.

-Dawe-

[BrandonS]

There is an example in LabVIEW that might help you out. It is called "Measure Hi Frequency (8253)". In this example it measures the frequency between two rising edges. The example description explains how to wire up this example. It uses two counters on your 1200.

[Russ@Davis]

You inidcated that your dealing with pulses of 2 to 2500 pulses per minute -- is it really that slow? I can successfully read 4 HZ to 5000 HZ but using analog inputs and FFT's -- but your talking an awful low frequency.

RS

[Dawe]

I apologize. It should be per second and not per minute.

-Dawe-

[Russ@Davis]

Data needs to be collected at what sort of speed timing??