Frequently asked questions
1. What can piezoelectric sensors measure?
Dynamic measurements (ie. measurements rapidly changing over time). Piezoelectric sensors cannot measure static measurements because the crystals of a piezoelectric pressure sensor generate a charge when pressure is applied but that charge eventually leaks to zero.
2. What are the basic structural designs used in manufacturing piezoelectric sensors?
They are the flexural, compression and shear designs. All three designs contain the basic components of the piezoelectric element, seismic mass, base, and housing.
3. What are the main materials used to manufacture piezoelectric elements?
Quartz and lead zirconate titinate (ceramic) are the two most common materials used in the manufacture of piezoelectric elements. Quartz sensors offer high voltage sensitivities and require voltage amplifiers to condition the signal. Ceramic-based sensors provide a high charge output and a high capacitance.
4. What is frequency response?
The frequency response is the frequency range over which the sensor will provide a linear response. The upper end frequency response is determined by the sensor’s resonant frequency and the low end frequency response is determined by the sensor’s discharge time constant.