Study Of Position System Based On Acceleration Sensor

With the development of MEMS (Micro Electrical Mechanical System), Micro-Inertial Measurement Unit (MIMU) has gradually showed its excellent performance. The measurement of acceleration plays a very important part in the field of Inertial Measurement. By measuring the acceleration of the carrier, the navigation information such as the speed and position of the carrier can be obtained. So it is of great significance to start researching and developing in this field. This paper mainly focuses on the two-dimensional space orientation system which uses the accelerometer as the core. We discuss the character and signal output of the MIMU. So, the paper mainly includes the following contents:1. Build the hardware system according to the characteristic of ADXL203 and the device we have. This step main includes setting the bandwidth of ADXL203,matching the impedance between ADXL203 and the subsequent circuit,filter the noise in the output signal.2. Complete and optimized the arithmetic of the system and design the architecture of the software. By analyzing the output signal of ADXL203,an integral method based on relative acceleration has been put forward. It helps reduce the offset of the system. By setting the threshold of the acceleration and updating the static output of accelerometer automatically, the precision of the system has been improved.3. Develop the software which is used to collect and process the output data of ADXL203 according to the hardware system using VC++6.0 platform.4. Test and debug the system and analyze the result. One-dimensional motion and two-dimensional translational motion experiments have been carried out here and a conclusion that the orientation error is below 5% in both experiments has been made.5. Make a conclusion and bring forward the works that can be further developed next steps.