Transfer Function Equation

  • Thread starter NeRdHeRd
  • Start date
  • #1
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Homework Statement



A pressure measurement system uses a sensor that converts pressure into voltage according to the transfer function, Vp = (.5)(square root of P). This voltage is then converted into a current. As pressure varies from 0 - 100 psi, the current varies from 4 - 20 mA.

A. Find the transfer function equation for the conversion of voltage to current.

Known variables
P = 0 - 100 psi
I = 4 - 20 mA


2. The attempt at a solution

I would attempt a solution if I knew where to start. The best I can do so far is use the given transfer function of Vp = (.5)(square root of P) to convert pressure into voltage. After that I'm at a loss as to where to get the equation for the conversion of voltage to current. Is there anyone out there that can point me in the right direction?
 
Last edited:

Answers and Replies

  • #2
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Yeah that's pretty vague; There is an infinite amount of different functions you can fit to the 2 endpoints given. You can use linear interpolation for the easiest transfer function based on your thinking of grabbing the corresponding voltages to the pressures/currents.
 

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