Could someone please help me ?

[ramiyro]

Hello could someone help me because I have a problem when I am displaying data from my acquisition. I am measuring in the

            x- axis:            Displacement    in [mm] with a LVDT

            y- axis:            Temperature     in °C                with a Pt-100

And I have two problems:

1) The first one is with my LVDT because even when there’s NOT displacement, there is a variation on the voltage and a little variation in my displacement of course. 

Is there a way that I could adjust the sensitivity of my acquisition in order to have real line and not this variation?

 [image in the word doc.]

 

Fig.1.-This is an example where I increased the temperature, and the LVDT was in the same position.

2) The second one is with my scale, and I don’t know why I cannot add a new scale

to my Position’s Acquisition.

For example I would like to establish somewhere that:

0 mm = 1.25V              and

2 mm  =3.75V

Is that Possible?

 [image in the word doc.]

[Yin]

For the answer to the first question,

It looks like your sampling rate is pretty high so you're getting a lot of data points.  Maybe if you grouped the data points into arrays and then took the mean, you might get a more real line.  You might also decrease the sampling rate and see how it does. 

For the answer to the second question,

I'm not sure what exactly you mean.  Do you mean that you would like to have a range of voltages on the x-axis rather than displacement(mm)?  In that case you can run a for loop and calculate all the values in the array for the x-axis and plot it on a new graph.

Hope that helps

[Kodeeswaran]

ya you can use the curve fitting functions in the mathematics function block, there are lot of functions there you could choose the best one for you application, you just check out this functions.

[Kodeeswaran]

ya you can use the curve fitting functions in the mathematics function block, there are lot of functions there you could choose the best one for you application, you just check out this functions.