Using Polynomial Interpolation to convert voltage to pressure

[rush67]

Hi LabVIEW Community!

I am currently experimenting with linear and non-linear approaches to convert voltage to pressure for a home project. While I can look up the calibration scale from the transducer producers manual I just want to know what names of these the circled items are (sorry I am a novice with LabVIEW so terminology is a weakness for me). This photo was shared by a member but this was 13.5 years ago and I doubt they are still active in the community.

Please see the attachment for reference regarding circled items.

Thanks!

[LLindenbauer]

They are these two functions:

https://zone.ni.com/reference/en-XX/help/371361R-01/glang/build_array/

https://zone.ni.com/reference/en-XX/help/371361R-01/glang/in_range_and_coerce/

[altenbach]

I think you have more problems than just identifying very common LabVIEW functions. Polynomial interpolation is certainly overkill for this, because you only have two points, meaning it will result in the special case of a linear interpolation, a much more trivial problem.

If you tell us a little bit more about your project, I am sure we can provide more detailed help.

[santo_13]

If you're using a DAQ, you can create a custom scale and use map ranges option. Now your 0.5-4.5V signal is mapped to 0-150PSI.