![]() The voltage produced will be proportional to the magnitude of the applied force. ![]() Thus a potential difference will be generated on the crystal due to its property. If a force is applied on the pressure port, the same force will fall on the force summing member. The figure shows a conventional piezoelectric transducer with a piezoelectric crystal inserted between a solid base and the force summing member. But the output response may be as high as 100KiloHz.This proves that the device is best applicable for dynamic measurement. For example, if a force of 15 kiloN is given to the transducer, it may only deflect to a maximum of 0.002mm. The device is also known to be mechanically stiff. As the charge produced is very small, a charge amplifier is needed so as to produce an output voltage big enough to be measured. The rate of charge produced will be proportional to the rate of change of force applied as input. Piezo electricity can be defined as the electrical polarization produced by mechanical strain on certain class of crystals. The charge thus produced can be called as piezoelectricity. The main principle of a piezoelectric transducer is that a force, when applied on the quartz crystal, produces electric charges on the crystal surface. Piezoelectric Crystal Piezoelectric Transducer The X-Y axis of a piezoelectric crystal and its cutting technique is shown in the figure below.
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