Methods for compensating parameters of operating accelerometer for temperature variations

摘要

A method is disclosed in this invention for compensating a temperature dependent variation of an offset V_offset and sensitivity V_sensitivity parameters of an accelerometer. The method includes steps of a) Measuring a Sensitivity V_sensitivity(T0) and an Offset V_offset(T0) at a room temperature T0 to input to a microprocessor to calculate two tilt angles θ1 and θ2 in placing the accelerometer in a furnace for adjusting a controllable temperature therein; b) Keeping the accelerometer at the fixed tilt angle θ1 and adjusting the temperature of the furnace for measuring an output voltage at θ1 Vo(T, θ1) and keeping the accelerometer at another fixed tilt angle θ2 and adjusting the temperature of the furnace for measuring an output voltage at θ2 Vo(T, θ2); and c) solving equations to obtain the offset V_offset and sensitivity V_sensitivity parameters at different temperatures and storing these parameters in the microprocessor.