Research and Implementation of Parallel Data Acquisition System for Inertial Sensor Array

Arrays can improve the performance of inertial sensors, but the lack of synchronization in acquisition times among sensors is a significant challenge. To address this issue, a data acquisition system has been developed that uses parallel I2C and SPI buses to enhance measurement precision. This study compares the impact of serial and parallel bus architectures and sensor quantity on the efficacy of inertial sensor arrays. The performance indices used for evaluation include zero bias, zero bias stability, and Allan variance. The experiment indicates that the parallel bus significantly enhances the zero bias stability of the sensors. The incorporation of additional sensors reduces stochastic errors, such as angle random walk, quantization noise, and zero bias. The use of a parallel bus configuration enables easy expansion of the sensor count within the array, thereby significantly enhancing the applicative merit of the inertial sensor array.