Centroid position equation for CapSense Slider

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YoIs_1298666
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Hello,

We can find the centroid position equation for CapSense Slider in "AN64846 - Getting Started with CapSense ".

Which of the CapSense Configuration and Tuner measurements does each variable refer to?

YoIs_1298666_0-1627546362659.png

The following are the values actually measured by Tuner and values of CapSense configuration.

Maybe "Resolution" means "Maximum position  232".

The n means 6.

What is "maximum" and Si?

YoIs_1298666_1-1627546564932.png

YoIs_1298666_2-1627546602019.png

Best regards,

Yocchi

 

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1 Solution
ncbs
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Hi @YoIs_1298666,

Resolution indicates the maximum count number to be reported, and this corresponds to the maximum position value. 

n corresponds to the number of segments present in the slider

maximum corresponds to the index number of the segment whose signal reported is the highest.

Si corresponds to the difference counts of the i^th segment of the slider. Difference counts is defined as 
              difference counts = raw counts- baseline

 

Regards,

Nikhil

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ncbs
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Hi @YoIs_1298666,

Resolution indicates the maximum count number to be reported, and this corresponds to the maximum position value. 

n corresponds to the number of segments present in the slider

maximum corresponds to the index number of the segment whose signal reported is the highest.

Si corresponds to the difference counts of the i^th segment of the slider. Difference counts is defined as 
              difference counts = raw counts- baseline

 

Regards,

Nikhil

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Hello Nikhil-san,

Thank you very much for your reply.

What is index number of the segment whose signal reported is the highest of "maximum"?

SLD_sns2 is the highest result of the attached tuner. What is this index number?

Best regards,

Yocchi

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ncbs
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Hi Yocchi-san [ @YoIs_1298666 ]

The index number of SLD_sns2 would be 2.

Regards,
Nikhil

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