"Piezoelectric effect" in piezoelectric ceramic sheets

When it comes to the piezoelectric effect, many professional people often cannot understand the meaning of the word. The following is a general knowledge to explain the "piezoelectric effect." The piezoelectric effect is divided into two aspects, one is the positive piezoelectric effect, and the other is the inverse piezoelectric effect; if the piezoelectric itself is operated, it will affect the potential. If the potential is operated, the piezoelectric is The corresponding force will be generated, and the two together are the piezoelectric effect.

The main applications of piezoelectric effect: 1) force-sensitive sensors: measurable force, pressure acceleration, etc.; 2) vibration shock sensors: seismographs, machinery, bridges and buildings; 3) ultrasonic sensors: sonar systems. 4) Piezoelectric microphone. 5) Ignition device: lighter, gas stove igniter, projectile detonation.

Piezoelectric ceramic sheet with piezoelectric effect: If pressure is applied to the piezoelectric ceramic, it will produce a potential difference called a positive piezoelectric effect. On the contrary, when a voltage is applied, a mechanical stress is generated, which is called an inverse piezoelectric effect. If the pressure is a high frequency vibration, then a high frequency current is produced. When a high-frequency electric signal is applied to the piezoelectric ceramic, a high-frequency sound signal, that is, mechanical vibration is generated. This is what we usually call ultrasonic signals. That is to say, piezoelectric ceramics have the function of conversion and inverse conversion between mechanical energy and electrical energy.

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"Piezoelectric effect" in piezoelectric ceramic sheets