LabVIEW architecture for DAQ

[peterhaz22]

I am wondering what is the best architecture to use to build a data acquisition (DAQmx) for continuous measurements of analog inputs?

Regards

Peterhaz22

[James.M]

Look in to the Queued Message Handler architecture. There's a template that ships with LabVIEW.

[crossrulz]

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@peterhaz22 wrote:

I am wondering what is the best architecture to use to build a data acquisition (DAQmx) for continuous measurements of analog inputs?

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Well, that really depends on what you are doing with the data.  But based on your very short description, something like the Producer/Consumer works well.

[Dennis_Knutson]

You really should have a better specification than just 'continuous acquisition'. The producer/consumer mentioned world well for some applications. A state machine works well for others. What else do you need to do?

[peterhaz22]

Well, I am using a USB device and CompactDAQ device to record data from seven analog input channels. All seven sensors will be synchronized and share a sample clock and start trigger. I am thinking of seven tasks and make use of producer-consumer architecture to initiate, acquire and stream the data. Shall I create a large event producer - consumer architecture for all seven AI channels or seven P-C for each channel?

[Dennis_Knutson]

You have to use a single task with all channels defined in it when a single module is used.

[peterhaz22]

And having two tasks when two modules are used including all of the sensors?

[crossrulz]

With a cDAQ, you can have a single task for all of the modules of the same type (analog inputs in this case).  So you should only need the one task.

What are you streaming the data to?  Are you doing anything else with the data?