Sensor Voltage

A typical piezoelectric sensor circuit is shown in Figure 21.1.

Since, in the sensory layer only mechanical field is present at sensor surface, the applied voltage is zero .

Figure 21.1: Piezoelectric sensory circuit.

The resultant stress due to mechanical deformation from Equation (20.5) could be written as

	(21.1)

The electric displacement from Equation (20.1) on the sensor surfaces is given as

	(21.2)