Easy Linearization Equation

gordianknot

Hello All,

Has anyone come across an easy linearization function that I could use to linearize the output from my GP2D02 sensors.

Any help would be awesome

Stan

davec

Pete Tomlinson has some code with linearization for the GP2D12 to ADS0831 to bs2 that might be useful for your 8bit GP2D02:
http://www3.sympatico.ca/ptomlins/

i think Jon Williams has a nuts and volts article that might help you too.

i've gotten pretty acurate distance measurement with the Sharp GP2Y0A02YK and have code for that if you want to go that way.

cheers

Tracy Allen

The response is basically distance=constant1/volts + constant2. There is quite a bit of variation between sensors in the values of constant1 and constant2.

Also Jonathan Peakall has a page here:

madlabs.info/gp2d12/sharp_gp2d12.shtml

with a routine for determining the values of the constants. That too is for the analog gp2d12, but I think the linearization part is the same.

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Tracy Allen
www.emesystems.com