Patent ID: 7765869
Filing Date: 2010-08-03
Classification: G01C,G01P

Abstract:
1. A combined accelerometer and gyroscope system, comprising: a combined accelerometer and gyroscope that maintains vibration of a mass body at a constant amplitude using an applied drive voltage, and that detects vibration signals in directions of an acceleration axis and an angular velocity axis; an acceleration axis vibration signal obtainment unit that obtains the vibration signal in the direction of the acceleration axis detected by the combined accelerometer and gyroscope; an amplitude maintenance control unit that outputs an acceleration axis vibration maintenance control signal, required to obtain a constant vibration amplitude, using the vibration signal received from the acceleration axis vibration signal obtainment unit; an acceleration axis driving input unit that receives a voltage signal from the amplitude maintenance control unit and applies the voltage signal to the combined accelerometer and gyroscope; an angular velocity axis vibration signal obtainment unit that obtains the vibration signal in the direction of the angular velocity axis detected by the combined accelerometer and gyroscope; a force balance control unit that outputs an angular velocity axis vibration maintenance control signal, which is required to have a constant vibration amplitude, using the vibration signal received from the angular velocity axis vibration signal obtainment unit; and an angular velocity axis driving input unit that receives a voltage signal from the force balance control unit and applies the voltage signal to the combined accelerometer and gyroscope.