How to implement a Data acquisition in NI myRIO 1900?

[GerdW]

Hi James,

Can we directly view the temporary signal from the electrodes when we connect the output of the amplified signal into the Analog Input of myRIO? We're using a waveform chart to view the signal

Yes, you can view your signal directly using this chart…

Right now your samplerate is even less with just 1Hz due to the 1000ms wait in the loop!

[jamescpe]

So we just need to increase the sample rate? There's nothing wrong with our VI implementation except the sample rate?

[GerdW · Accepted solution]

Hi James,

There's nothing wrong with our VI implementation except the sample rate?

You can increase the sample rate by reducing the wait time.

BUT: then you are limited by the execution speed of this ReadAI function.

The better option is to employ hardware-timing (if possible) and read more than one sample per Read call!

Again: I guess there are example VIs explaining such stuff for your myRIO…

[jamescpe]

Thank you! Also, do we need to convert the raw acquired data from myrio into voltage?

[GerdW]

Hi James,

with voltage input channels you get voltage values, no need to convert to voltage again…

[jamescpe]

We can now get the values from the analog input. But we cannot get any negative voltage

[GerdW]

Hi James,

which analog input did you use?

There are different types of AI - and all support a different input range!

Read the specs…

[jamescpe]

We used the MSP already and we were able to acquire negative values. Any idea how to convert this waveform into a signal?

[GerdW]

Hi James,

Any idea how to convert this waveform into a signal?

Any idea what's the difference between a waveform and a "signal"? (I don't know the difference.)

Which kind of "signal" do you need? Why don't you stick with your waveform?

[jamescpe]

When we use a chart it gives us an error. We need this waveform graph because we will use WA detrend VI