Real-Time Graph

[UMich22]

My experiment measures ten temperatures on a metal rod using thermocouples. I
am trying to create a real-time line graph that plots the temperature profile
over time at distinct time intervals, i.e. ten temps at 10 minutes, the ten
temps at 20 minutes but keeping the previous profile on the plot., and so on up
to an hour.

I would like the locations of the thermocouples (numbered 1-10) on the x-axis,
and temperature on the y-axis. I would like each temperature profile graphed at
a 10 minute interval, with no plots in-between.  It is necessary to keep all
the plotted profiles on the same graph so the student can see how the
temperature profile changes over time.

Is it possible to create such a graph, and if so, how would you do so?

[Ben]

Sounds like heat on a beam to me.

In this thread I included this image

That I thre together to illustrat the pressures on the surface of car in a wind tunnel.

You can change the axis from spacial to time and possilby work with that as a start.

And something tells me that NI has included an example that lets you map reading to a surface if you want to thake the time to map the sensor locations.

Have fun, and please share your results so the rest of can learn from your work.

Ben

[RTSLVU]

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@UMich22 wrote:

My experiment measures ten temperatures on a metal rod using thermocouples. I
am trying to create a real-time line graph that plots the temperature profile
over time at distinct time intervals, i.e. ten temps at 10 minutes, the ten
temps at 20 minutes but keeping the previous profile on the plot., and so on up
to an hour.

I would like the locations of the thermocouples (numbered 1-10) on the x-axis,
and temperature on the y-axis. I would like each temperature profile graphed at
a 10 minute interval, with no plots in-between.  It is necessary to keep all
the plotted profiles on the same graph so the student can see how the
temperature profile changes over time.

Is it possible to create such a graph, and if so, how would you do so?

---

"locations on the X-axis" does not make sense. 

[GerdW]

Hi UMich,

yes, that's possible. And it's easy: your drawing looks like having 3 plots on a graph…

- Each "ten minutes interval" forms a plot.

- You can use a waveform graph as you have evenly spaced x axis values.

- You could even get away with a single plot when you insert NaNs between the intervals…

[UMich22]

I'm still confused on how to actually go about creating this graph/chart. I am still fairly new to Labview, so I don't know a lot of the features. Could you please elaborate a little more?

[GerdW]

Hi UMich,

read the context help for charts/graphs. They explain how to have more than one plot in the chart/graph!

LabVIEW also comes with a lot of example VIs. There are also examples explaining how to use charts/graphs…