What Are The Classifications Of Acceleration Sensors?

Acceleration sensor is a simple and practical detection device, which can sense the acceleration and convert it into other forms of signal for output. Acceleration sensors are used in more and more scenarios, such as game control, automobile safety and other fields, which is due to its flexible and stable working principle, and with the development of acceleration sensor horizontal technology, its product types are also developing in a diversified direction.

Classification

Piezoelectric

Piezoelectric acceleration sensor is also called piezoelectric accelerometer.It also belongs to the inertial sensor.The principle of piezoelectric acceleration sensor is to utilize piezoelectric effect of piezoelectric ceramic or quartz crystal. When the accelerometer is vibrated, the force of mass block on piezoelectric element changes accordingly.When the measured vibration frequency is much lower than the natural frequency of the accelerometer, the force change is proportional to the measured acceleration. ER-QA-03A is a high-performance quartz accelerometer based on the piezoelectric principle, with bias repeatability of 10-50μg, proportional coefficient repeatability of 15-50 PPM, Class II nonlinear repeatability of 10-30μg/g2. Its special flexible construction enables it to adapt to high acceleration applications under various environmental conditions, such as high temperature, high pressure and high vibration environments. In addition to being widely used in aerospace and military fields, quartz flexible accelerometers are also widely used in automotive, medical and scientific research fields. In the automotive sector, they can help automakers improve the performance and safety of their vehicles while improving their fuel efficiency. In the medical field, quartz flexible accelerometers can be used to monitor and diagnose human movement and physiological processes. In the field of scientific research, they can be used to study earthquakes, crustal movements, cosmology, and microgravity environments.

Piezoresistive type

Based on the world's leading MEMS silicon micromachining technology, piezoresistive acceleration sensors are characterized by small size and low power consumption, which are easy to be integrated into various analog and digital circuits and widely used in automobile collision experiments, test instruments, equipment vibration monitoring and other fields.

Capacitive

The capacitive acceleration sensor is a capacitive sensor based on the capacitive principle.Capacitive accelerometer/capacitive accelerometer is a general purpose accelerometer.In some areas, there is no substitute, such as airbags, mobile phones and other mobile devices.The capacitive accelerometer/capacitive accelerometer USES the microelectromechanical system (MEMS) process to become economical in mass production, thus ensuring lower cost. MEMS accelerometers have a wide frequency response capability. Piezoresistive acceleration sensors are suitable for pulse and crash tests, where the frequency and acceleration are usually high. As a sensor with DC response ability, the user can obtain the velocity and displacement information without integral error through its acceleration output. The ER-MA-5 bias repeatability of 5 ug, scaling for several months repeatability of 300ppm, suitable for both volume and accuracy requirements of the carrier. MEMS accelerometers, combined with gyroscopes and magnetometers, can also form inertial measurement units (IMUs).

Servo type

The servo acceleration sensor is a closed loop testing system, which has the characteristics of good dynamic energy, large dynamic range and good linearity.Its working principle, the vibration of the sensor system is composed of "m - k" system, the same as the general accelerometer, but also the quality m and an electromagnetic coil, when the base has the acceleration input, the quality of the piece of deviating from the equilibrium position, the displacement detected by displacement sensor, the size of the servo amplifier amplification after converted into current output, the electric current flows through the electromagnetic coil, electromagnetic restoring force in the magnetic field of permanent magnet, trying to keep quality of the original balance position in the instrument housing, so servo accelerometer in closed-loop state job.The servo acceleration measurement technology is widely used in inertial navigation and inertial guidance system, as well as in high-precision vibration measurement and calibration, due to its feedback effect, enhanced anti-interference ability, improved measurement accuracy and expanded measurement range.

If you want to get more details about accelerometer ,pls visit https://www.ericcointernational.com/accelerometer/