Design of Data Acquisition and Processing for IMU

Inertia measurement unit (IMU), which is mainly used to measure triaxial acceleration and angular velocity, is an important part of the navigation control system. Data acquisition for gyroscopes and acceleration in IMU is primarily explored. A design scheme based on AT91RM9200 and embedded Linux operating system is introduced. Before analogy signals from IMU are imported into A/D converter, they should be filtered by pre-treatment circuit, and then processed by Micro-computer. Lastly, direction and attitude can be exported through RS232. System driver is developed by Linux, and software compiler mainly employs U-boot 1.3. When the supply power is V, compare with the data from system and Fluke 8845A with high accuracy. It´s proved that the data acquisition system is achieved the needs of design. Moreover, the system is small in size, low in power consumption, and good in stability and practicality. In the military field, it has a wide use.