Sound and Vibration Measurement: Instrument Network Service for LabVIEW Pt4: Data Stream Functionality - analysis

RE: Sound and Vibration Measurement: Instrument Network Service for LabVIEW Pt4: Data Stream Functionality - analysis

Jan Cumps — Fri, 06 May 2022 13:40:45 GMT

When checking the processes in Linux with top, you can see the 2 threads running during a scan. I used this commend, to scan the two services and the threads generated:

top -H -p520 -p560

Result when scanning continuously:

When stopping the scan, the two additional threads disappear. The services keep running.

There are several ways to get the service process id. This is the simplest:

sudo systemctl status daqhats.service

RE: Sound and Vibration Measurement: Instrument Network Service for LabVIEW Pt4: Data Stream Functionality - analysis

Jan Cumps — Mon, 18 Apr 2022 13:07:10 GMT

I've made a dummy instrument service (available on github), that allows anyone to test the software and the LabVIEW driver, without DAQ HAT.

At this moment, it returns a constant increment output, starting from -5V, incrementing with 0.000001 V at each sample. It's resulting in output that is in the valid range for this instrument, and easy to (automatically) validate the results. You can check if any values are dropped, corrected or skipped.

Here's a capture with 1024 samples. Delayed for "showing data retrieval on video" sake but it performs without delays in the real world.

[View:https://youtu.be/T9nxxh-gBMI:640:360]

RE: Sound and Vibration Measurement: Instrument Network Service for LabVIEW Pt4: Data Stream Functionality - analysis

mp2100 — Fri, 15 Apr 2022 00:16:36 GMT

<quote>

Complex topic warning.

</quote>

Thanks for the warning. Your posts are always informative and useful. And (for me) often complex.