We know that acceleration sensors are electronic devices that can measure acceleration forces. Most accelerometers work on the principle of piezoelectric effect. The piezoelectric effect mentioned is that the external force added to the crystal for the non-existent symmetric crystal is not only to deform the crystal, but also to change the polarization state of the crystal and establish an electric field inside the crystal. This is due to the mechanical force. The phenomenon of polarization of the medium, acceleration sensor is to take advantage of its internal crystal deformation due to acceleration this characteristic, the crystal deformation will generate voltage, as long as the relationship between the generated voltage and the acceleration is calculated, the acceleration can be Convert to voltage output.

In the accelerometer, there is a triaxial accelerometer. Similarly, he is based on the basic principle of acceleration. The acceleration is a space vector. On the one hand, to accurately understand the motion of an object, one must measure its three axes. On the other hand, in the case where the direction of motion of the object is not known in advance, only the triaxial acceleration sensor is used to detect the acceleration signal. Triaxial accelerometers have small size and light weight, can measure spatial acceleration, can fully and accurately reflect the motion properties of objects, and are widely used in aerospace, robotics, automotive and medical fields.

The current three-axis accelerometers mostly use piezoresistive, piezoelectric, and capacitive working principles, and the resulting acceleration is proportional to changes in resistance, voltage, and capacitance, and is acquired through corresponding amplification and filtering circuits. This and the common acceleration sensor are based on the same principle, so in a certain technology the three single axes can be turned into a three axis. For most sensor applications, two-axis accelerometers can already meet most applications. However, some applications are still focused on triaxial accelerometers such as data acquisition equipment, valuable asset monitoring, collision monitoring, building vibration measurement, wind turbines, wind turbines and other sensitive large-scale structural vibrations.

The advantage of a three-axis acceleration sensor is that only the three-dimensional acceleration sensor is used to detect the acceleration signal when the object motion direction is not known in advance. The three-dimensional accelerometer has the characteristics of small size and light weight, can measure spatial acceleration, and can fully and accurately reflect the motion properties of the object.