finding the displacement from the accelerometer signals using integration block

[imran@97]

hi 

I am using the LabVIEW for finding the displacement form the accelerometer signals by performing integration, but when i am recording the displacement signals, it is aligning with the time step data number intend of aligning with the time steps.

I am sharing the block diagram where i am using the DAQ assistance for taking the data from the accelerometer and laser sensor. can you please help me to correct it.

thank you.

[GerdW]

Hi imran,

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imran@97 wrote:

I am sharing the block diagram where i am using the DAQ assistance for taking the data from the accelerometer and laser sensor. can you please help me to correct it.

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No.

We cannot edit/run/debug images in LabVIEW.

Even more when those images mainly show ExpressVIs…

[imran@97]

I am attaching the VI file. here I am using the accelerometer and laser sensor and performing the double integration for finding the displacement form the acceleration signals, I am also using the curve Fitte block for removing the ramp from the integrated signal. 

 from this I am getting the displacement, but that displacement is aligned with the data point not with the time steps that i am giving to the integration block. I want to get to be align with the time steps. 

[altenbach]

So you are reading some data, subtract the mean, double integrate using some crazy Rube Goldberg construct, subtracting a 5th order polynomial and expecting a reasonable value for the double integral of the data? IMHO, there are too many cooks messing with the raw data.

Can you show us some typical raw data?

(Most non-beginners typically stay away from express VIs and dynamic data. I am sure this could be done right without any express VIs with code the size of a postage stamp. Why not place all traces on one graph? Why maximize the diagram and front panel to the screen?)

[altenbach]

See if this can give you some ideas....

[billko]

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@altenbach wrote:

See if this can give you some ideas....

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That's a pretty big postage stamp.  😄