Acceleration sensor is a kind of electronic devices that can measure acceleration. Acceleration is the object in the process of acceleration forces acting on an object that can be either constant or variable. General acceleration sensor according to the principle of piezoelectric effect, acceleration sensor generated by its internal crystal deformation due to the acceleration voltage, just calculate the applied voltage and the relationship between the acceleration and acceleration can be converted into voltage output. There are many other methods for acceleration sensors, such as the capacitance effect and heat effect, light effect, but its basic principle is due to the acceleration make some medium deformation, through measuring the deformation and the related circuit is converted into voltage output.

Voltage output type acceleration sensor and a piezoelectric acceleration sensor signal output voltage is not charge. The sensors inside contains a charge amplifier. Voltage mode sensor has 3 line (signal, power supply) and 2 line (signal/power). 2 line is also known as integrated circuit type piezoelectric sensor (IEPE). The adoption of coaxial line can easily (2 line, conductor and shielded wire) connection, IEPE is very popular. In this mode, the ac signal superimposed on the dc power supply. On the output side series coupling capacitance can remove the dc bias voltage of sensor, thus the sensor output signal only. Many modern instruments provide IEPE/ICP input interface, which can direct connection and IEPE sensors. If an IEPE power supply interface is not available, need persistence current source signal amplifier and IEPE sensors use a period. 3 line type sensor requires a separate dc power supply. Unlike charge output type acceleration sensor, piezoelectric ceramic element, in addition to the voltage output type acceleration sensor consists of a miniature circuit, circuit of the working temperature range limit the whole operating temperature range of the sensor, usually no more than 125 ° C. There are also some design increased to 175 ° C, but its performance in other aspects will be declined. The available dynamic range - because of the piezoelectric ceramic element has a very wide dynamic range, type electric charge output acceleration sensor is very flexible in terms of range definition, because of its full scale can through the remote charge amplifier adjust freely by the user. And voltage output type acceleration sensor has established full scale, its depends on the internal charge amplifier, once produced by the factory, will no longer be able to change.