Piezo Accelerometers

An piezoelectric accelerometer is a type of sensor that measures force due to acceleration of the sensor. The piezoelectric acceleration sensor is also called the piezoelectric accelerometer. It also belongs to the inertial sensor. It is the use of certain substances such as the piezoelectric effect of quartz crystal, when accelerometer vibration, mass and the force on the piezoelectric element changed also. When the measured vibration frequency is far lower than the natural frequency of the accelerometer, the change of the force is proportional to the measured acceleration.

Piezoelectric acceleration sensor is based on the piezoelectric effect of piezoelectric crystals. Some crystal in a certain direction stress deformation, its internal will produce polarization phenomenon, at the same time on the surface of the two that it produces the opposite charge sign; When the external force to remove, and restore to the electrically neutral state, this phenomenon is called "piezoelectric effect", a "piezoelectric effect" of crystal is called the piezoelectric crystal. The commonly used piezoelectric crystal quartz, piezoelectric ceramic, etc.The basic operating principle of any accelerometer is that a mass of known quantity is suspended and constrained by a calibrated force-sensing transducer. That way, the transducer can measure all force exerted on the mass due to acceleration. In the case of a piezo accelerometer, the force is measured using an integrated piezo sensor.