sinusoidal signal

[gkonstan]

I am getting a sinusoidal signal from a turbine flow meter.
Is there a way to read the actual data of mass flow with labview in real
time?

[Stu 708]

Are you saying the the correct signal being produced by the flow meter is
sinusoidal and how to translate this signal into flow?
In order to answer this question, you have to know the method of modulation
that corrosponds to the signal. AM, FM etc.
What does the documentation of the sensor say?
Stu
gkonstan wrote in message
news:970vtp$t4b$1@foo.grnet.gr...
> I am getting a sinusoidal signal from a turbine flow meter.
> Is there a way to read the actual data of mass flow with labview in real
> time?
>
>

[John Lum]

Is the frequency of the sinusoidal output proportional to the flow rate? If so, then you've got a variety of options:

1. If you're using a general-purpose data acquisition board, then you can use an analog input channel and a while loop to repeatedly read in N points of the sinusoid and do an FFT to determine the frequency and instantaneous flow rate.

2. For higher channel counts, there is special-purpose signal conditioning hardware such as the SCXI-1126 on the NI Web site that does the analysis in hardware.

Best Regards,
John Lum
National Instruments

[Tomoya ITO]

You can use DAQ boards to get the actual data.
PC-MIO-16 series might be better for your purpose
I think. Tom

gkonstan wrote:

> I am getting a sinusoidal signal from a turbine flow meter.
> Is there a way to read the actual data of mass flow with labview in real
> time?