Integration LVM file

[@EmilioHd]

Hi, sorry if my english is not the best

I need to process this signal, but one of the processing steps is to integrated it (as if I had an op amp in integrator mode), if I put the integral block directly it would show me a linear function.

Can you help me to check, why am I wrong?

[GerdW]

Hi Emilio,

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@EmilioHd wrote:

I need to process this signal, but one of the processing steps is to integrated it (as if I had an op amp in integrator mode), if I put the integral block directly it would show me a linear function.

Can you help me to check, why am I wrong?

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You are wrong in two ways:

1. By attaching just images we cannot run/edit/debug your VI. How can we help you when you don't supply your code?
2. Your signal values only fluctuate between 20 and 21: which kind of signal other than an (nearly linear) steadily increasing line do you expect?

[@EmilioHd]

Hi all, actually I upload the signal file into a txt file by using matlab, i dont know if it would help.

Actually this is the flow signal of an spirometer, but the theory sais that if i want to have the volume signal i need to integrated it and then find the min and max values, it would integrate the signal, but it appears to be linear, i dont know if i am doing something wrong.

It needs to appear similiar to the orignal signal,

[GerdW]

Hi Emilio,

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@EmilioHd wrote:

Actually this is the flow signal of an spirometer, but the theory sais that if i want to have the volume signal i need to integrated it and then find the min and max values, it would integrate the signal, but it appears to be linear, i dont know if i am doing something wrong.

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Your signal has a small range (max-min) of just ~1.0, while it has a huge offset of ~20.5.

What happens when you integrate such a signal? (What did you learn at school about the math integration operation?)

What happens when you subtract the mean of the signal before integration?