Solving the Steinhart Hart Equation

For discussing how to choose sensors and create a wiring harness for all Bowling and Grippo versions of the MegaSquirt® EFI controller.
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OW
MegaSquirt Newbie
Posts: 3
Joined: Thu Aug 09, 2007 2:36 am

Solving the Steinhart Hart Equation

Post by OW »

Hello,

I'm interested in solving the Steinhart Hart Equation.
I want to know how each parameter can be detected. I've found a ew programs which solve the equation and sho the Steinhart Parameters, but I want to solve it "by hand".
Are there any related lnks? Please help!

Thank you!
MSII, V3.0, Yamaha R6 Throttle Body, Kamasaki GPZ 305 Engine
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efahl
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Location: San Clemente, California, USA
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Post by efahl »

It's pretty simple, I think I did it by hand to verify the algorithm before I added it to the gentherm program back in 2001 or whenever it was... Here's the page I wrote up at the time: http://www.not2fast.com/megasquirt/doc/thermistor.html

Eric
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Mk1rocco
Helpful Squirter
Posts: 52
Joined: Mon May 17, 2004 7:16 pm

Post by Mk1rocco »

The simplest way to determine the three coefficients is to in plug the temperature and resistance values into the equation for 3 different points, this will give you three linear equations with 3 unknowns from there it's just simple high school algebra to solve for the unknowns.

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OW
MegaSquirt Newbie
Posts: 3
Joined: Thu Aug 09, 2007 2:36 am

Post by OW »

Thank you very mch!
That is exactly what I've been looking for.
MSII, V3.0, Yamaha R6 Throttle Body, Kamasaki GPZ 305 Engine
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