Performance of measuring vibration of MEMS sensor

Abstract

The purpose of this study is to examine the usefulness of an MEMS sensor for measuring vibration of agricultural vehicle by obtaining serial data of vibration acceleration of agricultural vehicle using an MEMS sensor and translational accelerometer and thereby calculating RMS and PSD for comparison and analysis as a step before construction of measuring system which can identify operating conditions of agricultural packaging machinery at all times. Although there are differences between vertical acceleration RMS and pitching angular acceleration measured by an MEMS sensor and translational accelerometer due to disturbance factors and computation errors, both measurements obtained by the two methods typically increase as vehicle body moves faster. For PSD, likewise RMS, there were differences in measurements, but peak frequencies were almost matched between the two methods, so it was confirmed that an MEMS sensor could exactly detect vibration characteristics. Therefore, it was considered that instead of large and costly translational accelerometer, an MEMS sensor which can measure both translational acceleration (back-and-forth, lateral, and vertical) and angular acceleration (rolling, pitching, and yawing) only with a single unit could be properly used in identifying vibration characteristics of agricultural packaging machinery.