Ultrasound sensors generate ultrasonic waves. Ultrasound Transducer and Piezoelectric Crystals:.The output is measured as voltage which is proportional to the applied pressure. ![]() When a force is applied to the piezoelectric diaphragm, it generates electric charge across the crystal faces. The pressure changes in liquids and gases in cylinder pressure measurements, hydraulic process can be measured using piezoresistive pressure sensors. Dynamic pressure measurements include turbulence, engine combustion, etc. They are used to measure dynamic pressure. Piezoelectric Sensor Circuit Applications of Piezoelectric Sensors: To obtain the complete response of the sensor, load and leakage resistance should be larger enough such that low frequency is maintained. The value of capacitance C e is inversely proportional to the elasticity of the sensor material. An inductor is connected which produces inductance due to inertia of sensor. It consists of internal Resistance R i which is also known as insulator resistance. The piezoelectric sensor circuit is shown below.
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