Inertial sensor is a kind of sensor, which mainly detects and measures acceleration, tilt, impact, vibration, rotation and multi-degree-of-freedom movement, and is an important component to solve navigation, orientation and motion carrier control.
Inertial sensors include accelerometers (or accelerometers) and angular velocity sensors (gyroscopes), and their single-axis, two-axis and three-axis combinations IMU (inertial measurement unit) and AHRS (attitude reference system including magnetic sensors).
MEMS accelerometer is a sensor which uses the inertial force of sensing mass to measure, and usually consists of a standard mass (sensing element) and a detection circuit. IMU is mainly composed of three MEMS acceleration sensors, three gyroscopes and resolving circuits.
Extended data
As a consumer electronic product, low-precision MEMS inertial sensors are mainly used in mobile phones, GPS navigation, game machines, digital cameras, music players, wireless mice, PD, hard disk protectors, smart toys, pedometers and anti-theft systems. Because of its basic measurement functions such as acceleration measurement, tilt measurement, vibration measurement and even rotation measurement, consumer electronics applications to be tapped will continue to emerge.
As an industrial and automotive product, the intermediate MEMS inertial sensor is mainly used in GPS-aided navigation system of automotive electronic stability system (ESP or ESC), automobile airbag, vehicle attitude measurement, precision agriculture, industrial automation, large medical equipment, robots, instruments and meters, construction machinery, etc.
As a military and aerospace product, high-precision MEMS inertial sensor mainly requires high precision, full temperature range, impact resistance and other indicators. Mainly used for stability applications such as communication satellite wireless, missile seeker and optical aiming system; Aircraft/missile flight control, attitude control, yaw damping and other control applications, as well as medium-range missile guidance, inertial GP battlefield robots and so on.
References:
Baidu encyclopedia-inertial sensor