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rr2
Joined: 09 Mar 2009
Posts: 4
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| A Math question?? |
 Posted: Wed Nov 04, 2009 10:39 am |
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Hi,
I facing a "simple" but complicated problem to me.
I need to take some values from a linear graphic where:
5Vdc = 1.0000Mpa
1Vdc = 0.0000Mpa
0,6Vdc = -0.100Mpa
I have the "volts" but i can´t make the formula to get the midle values.  of Mpa
Mpa = units of a pressure sensor.
Thanks in advance
RR2. |
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Alberto
Joined: 29 Sep 2009
Posts: 6
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| Re: A Math question?? |
| Posted: Wed Nov 04, 2009 10:48 am |
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| rr2 wrote: | Hi,
I facing a "simple" but complicated problem to me.
I need to take some values from a linear graphic where:
5Vdc = 1.0000Mpa
1Vdc = 0.0000Mpa
0,6Vdc = -0.100Mpa
I have the "volts" but i can´t make the formula to get the midle values. of Mpa
Mpa = units of a pressure sensor.
Thanks in advance
RR2. |
if it is a line the formula is y = x*m + offset, the offset is the value for x=0 so if x is Mpa the offset is 1Vdc, m is the slope, that is (5Vdc-1Vdc)/1Mpa = 4Vdc/Mpa
y = x*4Vdc/Mpa + 1Vdc, with x the value in Mpa and y the result in Vdc
if you have volts, you can do x = (y-1)/4, that is your formula |
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rr2
Joined: 09 Mar 2009
Posts: 4
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| Posted: Thu Nov 05, 2009 4:15 am |
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Thank´s very much.
It´s really simple
Bye |
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