Graph XY - plot issue

[gregorian7]

Hi GerdW,

That supposed to double simple constace not array. My mistake.

Have you got any idea why Graph XY only reading Force signal. It's strange as I can read signal on LVDT chart.

Thanks,

gregorian

[GerdW]

Hi gregorian,

did you notice all those coercion dots in your VI?

Why did you define the constants initializing the shiftregisters as "array of CDB"? Use simple "array of DBL" here!

[gregorian7]

Hi GerdW,

Sorted. Thank you very much.

Could you give one more advice, namely my LVDT signal is flactuating giving +-10mV, 1mm stroke of my LVDT is 30mV thus flatuacting signal is very signifivant to my results.

Do you know any solution for this problem?

Thanks,

gregorian

[GerdW]

Hi gregorian,

you might think about filtering.

One way to reduce noise is averaging - like reading 100 samples, but using the average of them…

On your VI:

- those array constants should be empty (right-click -> data operations -> empty array)

- clean up the whole VI (Ctrl-U)

- use BuildArray instead of InsertIntoArray

[gregorian7]

Thanks GerdW.

When I change Insert Into Array function to Built Array I have got broken wire after this function as well as to Graph XY.

I have tried Mediam Filter but doesn't make any changes to reading values from LVDT.

Where should I use average function insde the loop?

In my case when I setup 100 samples per channel I will have array with 100 elements on output of DAQmx Read function, so I should averged the array after Index Array function. Do I understand the code right?

Thanks,

gregorian

[GerdW · Accepted solution]

Hi gregorian,

what's your problem with BuildArray? Ever tried one of those right-click options like "concatenate inputs"?

Why do you use Median, when you want to calc the mean? (Do you know the difference and did you read the LabVIEW help?)

[altenbach · Accepted solution]

---

wrote:

what's your problem with BuildArray? Ever tried one of those right-click options like "concatenate inputs"?

---

If the number of array dimensions differ by one, it will concatenate automatically. No right-click needed.

This is also a prime example where you can cut the code complexity of building arrays in half by using complex data.

*

(Sorry, I don't have DAQ installed, so the VI is blank. I left the rest of the code "as is".)

[gregorian7]

Hi GerdW,

I just went blank with those arrays.

Thanks again for you help.

Have nice weekend.

Regards,

gregorian