Trigger external device based on analog input

[Smadi]

Hello Guys,

I am working with ViVitro cardiac simulator and I would like to use  LaVision PIV system to capture the flow downstream a prosthetic heart valve at different specific instants during the cardiac cycle (e.g., early systole, peak systole). I am using cDAQ-9178 board with NI 9205 module and I am using LabVIEW 8.5.

I would like to send a  trigger to PIV controller to start the acquisition based on flowrate analog input.

Your help is highly appreciated

[JD_war_eagle]

Hi Smadi,

Based on your description it seems like you are trying to send an specific output triggering signal from you 9205 to your PIV controller to start the acquisition by the PIV controller.  If this is accurate then you should be able to simply create an output task for the triggering signal and configure it to start using a software comparison.  Assuming that you are continuously acquiring data with your 9205, you should be able to programmatically compare the level of the analog input reading from the 9205 to determine when the trigger should be sent to the PIV controller.  Hope this information helps.