Design of Data Acquisition and Processing for IMU

Abstract

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 5 ± 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.

Design and Implementation of an On-Chip Low-Power and High-Flexibility System for Data Acquisition and Processing of an Inertial Measurement Unit

“…The Inertial Measurement Unit (IMU) is a group of sensors for measuring inertial data and typically contains three gyroscopes and three accelerometers [1,2]. Gyroscopes can be used to measure three-axis rotation angle or angular velocities, and accelerometers are used to measure three-axis acceleration.…”

A New Kind of Multiple Channels Data Acquisition Device & System Based on Sound Card

“…Multi channels data acquisition system based on computer is indispensable in industrial control and testing equipment [1]. Now there are many dedicated data acquisition cards on the market, but the application of these cards is single, the price is also more expensive, its compatibility with computer is poor, installation and disassembly are more trouble.…”