Is it possible to trigger the acquisition and recording of data in this condition?

[SeaMist]

Hi

I am a LabVIEW newbie,

Is it possible to trigger the data acquisition and recording in the following case;

I have two input signals 1. Pressure Transducer 2. Pulse from a magnetic pickup.

I have to plot the pressure data against the pulses. Can I make the magnetic pickup signal as master signal to trigger the data acquisition and recording? and at the same time acquiring the pressure data as well.

How can I do that ?

Thanks.

[Rich_Silley_NIUK]

Hi

Yes it is going to be possible to do what you require without too much effort. The thing that is going to define exactly how you achieve this is going to be the hardware that you are using to acquire you signals. What DAQ device are you using?

If I have understood correctly, I think the easiest way to achieve what you want is to use the pulses from your magnetic pick-up as an external clock to synchronise your pressure measurements with the pulses. This way data will only be read when a pulse is generated. Let me know if I have misunderstood what you are after.

If you let me know what hardware you have I can write you a quick example.

Thanks

Rich
NI | UK

 

[SeaMist]

Hi Rich

Thanks...

I have PCI - 6033E High resolution multifunction I/O board and NI BNC - 2090 adapter chasis.

What I am getting is the pressure from the transducer and magnetic pulses.

Two cosecutive pulses encompass one complete cycle of the combustion process inside the engine.

I need to record the data for presenting the information offline.

Since combustion is a highly unstable process I need to get the optimum representative grapgh at a particular engine speed.

So lets say, I want the magnetic pulse to trigger this the data acquisition for 50 of such pulses, i.e. 50 complete cycles of diesel engine. So that these 50 acquired cycles may be averaged for pressure readings and a single representative curve (graph) may be produced.

Thanks again

Message Edited by SeaMist on 06-26-2008 02:49 AM