How to implement a Data acquisition in NI myRIO 1900?

[jamescpe]

Our team is working on ECG Signal Acquisition using NI myRIO. We're having a problem when it comes to data acquisition using myrio. We are new to this environment. All answers are appreciated thank you

[GerdW]

Hi james,

We are new to this environment.

You surely took those beginner tutorials!?

Like this or that?

We're having a problem when it comes to data acquisition using myrio.

Which problem?

Did you play with those example VIs/projects coming with LabVIEW?

[jamescpe]

We utilized the Analog Input from the myRIO to get a waveform from a signal generator equipment (sine wave). But the result from our oscilloscope is different from the result in waveform chart in labview.

[GerdW]

Hi James,

most often the results obtained using two different measurement devices aren't "equal", I wouldn't call this a problem…

What have you tried? Mind to attach a VI?

How "different" are the results? What did you expect and what did you receive?

[jamescpe]

Here's the oscillocope outputHere's our Front Panel output

[GerdW]

Hi James,

do you use the very same sample rate with both devices?

In your myRIO VI you use 16.6Hz sample rate due to this 60ms wait function.

With your scope you use a time range of 200µs per div!?

[jamescpe]

When we put the same sample rate on both device, the signal doesnt look the same. The output in front panel is not giving us a sine wave. We really think that the problem lies in the acquisition of values from analog input. We need to plot the values from the analog input into a waveform. Thankyou

[GerdW]

Hi James,

I guess there are example VIs coming with myRIO. Did you use them to explore the AI input possibilities/capabilities? (I didn't istall that roboRIO toolkit, so I miss those functions.)

Which sample rate did you use for both devices? How do you read your samples when using a "high" sample rate? Do you mind to attach your (changed!?) VI for that use case?

[kartiknattar]

Hello jamescpe,

I beleive you are directly acquiring the data from the RIO and thats the reason why you are losing the data in the process.

Try to create a FPGA file and also a FIFO. Send the acquired data from FIFO and receive it in the host aaplication through FIFO.

[jamescpe]

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. We will implement the filtration and noise removal after we have acquired the signal properly.