Materials - Piezoelectric Sensors - Guidance [Weikewei]

Piezoelectric materialThe main indicators are:

1) Piezoelectric coefficient: a parameter that measures the strength of a material's piezoelectric effect and affects the sensitivity of piezoelectric output.

2) Elasticity coefficient: determines the natural frequency and dynamic characteristics of piezoelectric devices.

3) Dielectric constant: affects the inherent capacitance of piezoelectric elements, which in turn affectsPiezoelectric sensorThe frequency is offline.

4) Electromechanical coupling coefficient: refers to the square root of the ratio of the converted output energy to the input energy before conversion in the piezoelectric effect. The electromechanical coupling coefficient is used to measure the energy conversion efficiency of piezoelectric materials in the piezoelectric effect.

5) Resistance: The insulation resistance of piezoelectric materials will reduce charge leakage, thereby improving the low-frequency characteristics of piezoelectric sensors.

6) Curie point: When the temperature rises to a certain level, the piezoelectric effect of the material will disappear. The temperature at which piezoelectric materials begin to lose their piezoelectric properties is called the Curie temperature or Curie point.

Choose the appropriate onePiezoelectric materialIt is the key to designing and manufacturing high-performance sensors. Generally, conversion performance should be considered; Mechanical performance; Electrical performance; Good temperature and humidity stability; Time stability;