How does a piezoelectric sensor convert mechanical stress to electrical signals?
2 Answers
To understand how a piezoelectric sensor converts mechanical stress into electrical signals, let’s delve into the process. Piezoelectric materials, such as quartz or certain ceramics, have a unique property where they generate an electrical charge when subjected to mechanical stress. This is due to the internal structure of these materials: they have a crystalline lattice where positive and negative charge centers are aligned in a certain way. When mechanical stress is applied, it disrupts this alignment, causing a separation of charges and creating an electrical voltage across the material. This voltage is then measured and can be used to determine the amount of stress or pressure applied. This conversion of mechanical energy into electrical energy makes piezoelectric sensors useful in various applications, from pressure sensors to accelerometers.