Model Gallery

Model ID: 2185

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.

PIEZOELECTRIC COMPONENTS: Piezoresistive materials change their resistivity when subjected to mechanical stresses. In this model, the structural properties of the anisotropic crystal are coupled to the electric field.

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