Detailed explanation IMU inertial measurement unit
IMU available vector attitude, velocity and displacement information, are widely used in automobiles, robots, has also been used to estimate the need for precision displacement with the attitude of the case, such as submarines, aircraft inertial navigation equipment in.
Qingdao Teng-chi mems accelerometer chip
Based on IMU MEMS technology and MEMS inertial sensors, will be the focus of future development. Inertial measurement unit referred IMU, and an apparatus for measuring a three-axis attitude angle (angular rate) acceleration. Gyroscopes and accelerometers, inertial navigation system is the core of the device. With built-in acceleration sensor and a gyro, an IMU to measure linear acceleration and angular rotation rate from three directions, the posture information obtained carrier, velocity and displacement by the resolver.
IMU The definition and functions IMU inertial measurement unit is defined as a "device can measure three-dimensional motion and angular movement of the line without an external reference." Typically, each inertial measurement unit comprising three acceleration sensors and gyroscopes, were measured three degrees of freedom of angular and linear acceleration, and initial speed by integrating the acceleration, overlay calculation of the position, the spatial position of the object to give the velocity and direction of movement, in conjunction with the trajectory set inertial navigation systems, correction of heading and speed to achieve navigation.
Currently, the existence on the market mainly IMU 6 to 9 with the shaft axis. 6-axis IMU comprises a triaxial acceleration sensor, a three-axis gyroscope; 9-axis IMU is more than a three-axis magnetometer. Further, the IMU MEMS technology generally also built with a thermometer temperature calibration in real time. Whether an IMU shaft 9 or shaft 6, can be output in real time three-dimensional angular velocity signal and the acceleration signal, this solution the current pose of the object is calculated. This has important applications in platform stabilization and navigation. IMU IMU IMU devices are widely used on the car mostly used in applications requiring motion control devices, such as cars and robots, is also used to calculate the need for precision displacement with a gesture, such as submarines, aircraft, missiles and spacecraft inertial navigation equipment. Compared with other navigation systems, inertial navigation system also has comprehensive information, completely independent, highly subtle, continuous and real-time information, and important characteristics regardless of time and geographical constraints and human factors, etc., can be in the air, water, underground, etc. variety in the work environment.
