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Piezo resistor no voltage generation with applied pressure (zero volts everywhere)
Posted May 30, 2023, 12:59 a.m. EDT Semiconductor Devices, Results & Visualization, Studies & Solvers 1 Reply
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Hi, I am trying to simulate different piezoresistor designs to see which ones are more sensitive etc. I made one according to one of the common designs and placed the piezoresistive elements on high stress areas yet I don't get any voltage on the Electric Potential grapgh. I am mostly following the piezoresistive sensor guide of the COMSOL itself so I am bit puzzled. Is it not working as it supposed to be because the piezoresistive elements are Extruded on the membrane itself. As I said stress and displacement grapsh are fine so I am assuming there is a problem with Piezoresistive Effect only.
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The piezoresistive effect is a change in resistance due to pressure. No voltage is generated.
https://en.wikipedia.org/wiki/Piezoresistive_effect