What is a piezoelectric sensor?
The piezoelectric sensor is a device that measures pressure or voltage by piezoelectric, which is a phenomenon in which certain materials can generate electrical current when deforming. Thus, the piezoelectric sensor can convert them to them that develops on it by compression, impact, acceleration or vibrations to an electrical signal whose strength is proportional to the force of force. There are a number of naturally occurring materials that show this effect, especially quartz and tourmalines. Piezoelectric materials can also be synthesized industrially. Synthetic piezoelectric materials can be monocrystal materials similar to natural crystal, but with increased properties such as Gallium phosphate crystals; Piezocereramic materials such as lead zirconate titanate (PZT), which can be cheaply produced by saliva or heating of powder ingredients in the furnace; And polymers such as Polyvinylidene fluoride (PVDF) that can be made for thin, flexible movies.
Electrical signal generated by piezoelectric sensors rapidly pAda after the first application of force. This means that they are inappropriate for measurement of static force; However, they are excellent in measuring the forces of very short duration, such as impact forces. One crystals and piezoceramic sensors are very rigid and have a very high natural frequency. The natural frequency of the sensor imposes a limitation of its use because there is a measurement error when the frequency of vibration is measured to be measured by the sensor frequency. However, the high natural frequency of the piezoelectric sensor allows you to accurately measure very high frequencies. This means that it can be used to detect unusual vibration formulas that could be caused by defects of materials and components.
High rigidity of monocrystals and piezocoraminic sensors means that they often have similar physical properties to materials such as a stuster from which tools and machines are made. Sensors can therefore be incorporated into tools and machines as part of their structure so that they can be constructed with built -in sensors. This typeThe piezoelectric sensor is also very robust, it is able to handle heavy impact forces and work effectively at high temperatures and is used in many industrial applications for pressure measurement and material stress. They can also be used to measure acceleration - when the object accelerates, it develops strength in the opposite direction that can be measured by the sensor.
Piezoelectric sensors have a wide range of other applications. One common application is in microphones, where the force developed by sound waves is converted to electrical signals and recorded or reinforced. Flexible, light piezoelectric materials such as PVDF can be used on touch screens and touch pads and also have applications in scientific research. For example, small sensors can be connected by animals and even insects to monitor their activity and behavior.