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Hi
Aim measuring vacuum in the chamber and displaying on the LCD.The vacuum signal is non–linear signal. Now I want convert this signal to linear signal.
How to convert non-linear signal to linear signal.
Thank you
Regards Chandu
Make sure that the ADC has enough bits of resolution for all parts of the curve. Then deduce a corrective mathematical formula (a number of mathematical tools can perform curve-fitting from sample data) or create a table with known measurements and their expected translations, and then perform piece-wise linear interpolation.
If you can't get enough ADC bits, add some external hw with expontential or logarithmic behavour to at least partially linearize the input data before sending it to the DAC. Then deduce a formula or perform piece-wise linear interpolation.
"If you can't get enough ADC bits, add some external hw with expontential or logarithmic behavour to at least partially linearize the input data before sending it to the DAC"
For example: " the signals from sensors...
Your sensor manufacturer may well have some recommendations...