For transduction to occur, a change from one form of energy must also take place, such as a conversion from mechanical to electrical energy or vice versa. A piezoelectric sensor is a device that uses the piezoelectric effect, to measure changes in pressure, acceleration, temperature, strain, or force by converting them to an electrical charge. Applications; Principle of operation. The conversion of electrical pulses to mechanical vibrations and the conversion of returned mechanical vibrations back into electrical energy is the basis for ultrasonic testing. The active element is the heart of the transducer as it converts the electrical energy to acoustic energy, and vice versa.

A piezoelectric crystal transducer sensor is an active sensor and it does not need the help of an external power as it is self-generating. It is important to know the basics of a piezoelectric quartz crystal and piezoelectric effect before going into details about the transducer. There are certain materials that generate electric potential or voltage when mechanical strain is applied to them or conversely when the voltage is applied to them, they tend to change the dimensions along certain plane.

This effect is called as the piezoelectric effect. The piezoelectric transducers work on . This is a video explaining and demonstrating the construction of a homemade piezoelectric transducer. Therefore, the patch transducers can be used as strong piezoelectric effects induced in materials with an.

Piezoelectric material is one kind of transducers. A transducer can be anything which converts one form of energy to another. We squeeze this material or we apply force or pressure on this material it converts it into electric voltage and this voltage is function of the force or pressure applied to it. The material which behaves .