#PIEZO ACTUATOR AND SENSOR PORTABLE#

The signal condition would be done and this includes the conversion of the signal to a low impedance voltage, amplification, and filtering.Actuator applications of piezoelectrics started in late 1970s, and enormous investment was installed on practical developments during 1980s, aiming at consumer applications such as precision positioners with high strain materials, multilayer device designing and mass-fabrication processes for portable electronic devices, ultrasonic motors for micro-robotics, and smart structures. The micro-electric circuit will process the signal and this would be done either internally or externally. Mechanical stress would be applied to the crystal and the crystal would produce a signal proportional to the stress. So by using this property of the piezoelectric material we can measure displacement pressure etc. If we stretch or squeeze a piezoelectric crystal then the structure could be deformed and an electric charge will appear. If a piezoelectric material is exposed to an electric field, then it could be lengthened or shortened according to the voltage. If we are using these sensors for high-temperature applications then we must either use recess mounting, baffled diaphragm, or thermal protection coating. We must not use this type of sensor for high-temperature applications. By doing the proper alignment of the sensor the sensor will be highly sensitive.

In order to do the proper operation of the sensor then the sensor alignment must be done properly. Mostly these sensors are used to measure the dynamic pressure and they are not used for static pressure measurement. What are the factors that must be considered while using a piezoelectric sensor? The electric charge that reaches the face of the crystal would be of opposite polarity and it would be proportional to the strain. The diaphragm would cause a strain on the piezoelectric crystal when flexing due to the change in pressure. These sensors can detect the pressure by the displacement of a thin metal diaphragm. The major part of a piezoelectric pressure sensor would be a diaphragm and a piezoelectric crystal. A piezoelectric transducer is used for atomizing liquids, medical diagnostics, etc. The piezoelectric effect is reversible so the transducer can create ultrasonic sound from electrical energy and also it can convert the incoming sound into electrical energy. In the case of a piezoelectric transducer, it would convert the electrical energy into vibrational mechanical energy and it could be vice versa too. The actuator can also be useful to control the hydraulic valves. In a piezoelectric actuator, the electric signal is converted into a physical displacement and this will be used to control the precision of the machine tool.

What is a piezoelectric actuator and transducer? What is Diaphragm seal? Application of diaphragm seal.What is a manometer and for what purpose it is used?.What is a magnetic proximity sensor? What are the types of magnetic position sensors?.What is a magnetostrictive displacement sensor? What are the uses of a magnetostrictive material?.What is triangulation and explain triangulation sensor?.In some sensors, the physical parameters would directly act on the piezoelectric element while in the other device an acoustical signal establishes vibrations in the element and this vibration would be converted into an electric signal. The major function of a piezoelectric sensor is to convert the physical parameters such as acceleration or pressure into an electric signal. The electric charge which is created will be proportional to the mechanical stress. The crystals that are mostly used will be quartz, and barium titanate. These sensors operate according to the piezoelectric effect, the piezoelectric effect is the formation of electric potential in a crystal if it is subjected to mechanical pressure. A piezoelectric sensor can be used to measure the displacement, pressure, temperature, force, and strain.

Piezo actuator and sensor