Piezoresistive Elevator Button
This example shows a model of a piezoresistive in-wall elevator button. It was designed with the following requirements in mind:- durability with respect to high temperatures
- capability of producing signals that can be easily used in digital signal processing
- reliability, even when subjected to high loads
Piezoresistive materials change their resistivity when subjected to mechanical stresses. This model concentrates on piezoresistivity in a silicon-type material, which is widely used for such applications.
The button is embedded in an enclosure formed by the elevator control panel. Its operation is modeled by a force, which acts on the button’s upper boundary. To shield the piezoresistive silicon layer from fire, an adhesive, made of clay or brick, is attached to the resistive layer’s upper and lower sides.
Equation-based modeling is then utilized to couple the structural properties of the anisotropic crystal to the electric field.
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Slice plot showing the electric conductivity and boundary plot of the displacement. |
Engineering Fields
- Piezoelectric Components
- Actuators
Application Areas
- Structural Mechanics
- MEMS
- Electro- & Magnetostatics