AN EXPERIMENTAL STUDY ON BASIC PERFORMANCES OF ACCELEROMETER WITH CRYSTAL OSCILLATOR

Abstract

 An accelerometer, whose sensor adopts a crystal oscillator, can be expected even with higher sensitivity, and smaller and more accurate sensor than a conventional accelerometer which consists of a pendulum. However, the crystal oscillator is strongly affected by fluctuation of temperature. We modify a manufactured product of accelerometer to a kind of oven controlled crystal oscillator (OCXO), and examine its basic performance through two types of observations. A relationship between output values of temperature and acceleration is discussed and modeled using a simple regression expression to correct acceleration with value of temperature. It is found that the accuracy of the modified sensor is less than 3 mGal in root mean square after applying the correction.