Calculating Time from Given input.

[aisyah]

Hi everyone,

I'm stuck at trying to calculate the time of a given waveform.

Given a scenario, i have a circuit that is fed to a DAQ card for processing in LabVIEW. The input data generates a squarewave form in LabVIEW. I'm using a general waveform function to view the squarewave. The input is generated from a sensor.It will continously give a pulse when it detect something. But when it a doesnt anything, there'll be no output. so, no waveform is reflected at the waveform function in LabVIEW.

When that happens, I want to find the time when there's no output reflected at the waveform.

regards, aisyah.

[RavensFan]

If you know the period of your waveform, you could write code that detects when the input is 0 for a period of time that is slightly longer than the period of your waveform.

1.  Note time that waveform goes to zero.

2.  If waveform goes to 1 reset your timer.

3.  Loop and watch your timer, if the time minus noted time is greater than the waveform period, then write out the noted time.