High Speed Data Acquisition with Peak Valley Detector

[zdub2]

Hi all!

I am trying to run a simple DAQ program with 5kHz sampling and store to a file. I don't need all the data, just the peaks and valleys, but I stored all of the data to do the analysis in Excel or something. I only need  few seconds worth of data, and analyze about 50 peaks and 50 valleys. It is turning out to be a long process, so I was hoping to try it all in LabView. I played around with the peak detector vi, but I'm not sure it can run at 5kHz.I tried it and it seems to skip over some data. I don't know if I should store all of the data in an array, then run the data through the peak detector vi? And if that's the best way, not exactly sure how to go about doing that. i am attaching the simple VI I wrote to at least capture the data. 

Thanks for any help and feedback!

Zach

[santo_13]

I will give you some tips,

1. No need to read one sample by sample, read a chunk, probably worth 1s (5000 samples)
2. Process this set of 5000 samples for peaks & valleys
3. Instead of writing a line at a time, you could also build up the array and log once outside the loop
4. You could also use DAQmx Scales features to associate with and let DAQmx take care of applying them to each measurement it makes

You could refer this article on peak detection - https://www.ni.com/en-us/support/documentation/supplemental/06/peak-detection-using-labview-and-meas...