An offset-drift correcting device is designed for a gyro-sensor mounted on an object and outputting a signal representing an angular speed of the object. The device includes a first section for detecting whether or not the object is rotating. A second section connected to the gyro-sensor is operative for smoothing the angular speed represented by the output signal of the gyro-sensor, and deriving an average angular speed of the object from the angular speed represented by the output signal of the gyro-sensor. A third section connected to the first section and the second section is operative for estimating an offset level of the output signal of the gyro-sensor in response to the average angular speed derived by the second section in cases where the first section detects that the object is not rotating. The third section includes an adaptive filter processing an output signal of the second section which represents the derived average angular speed. A fourth section connected to the gyro-sensor and the third section is operative for subtracting the offset level estimated by the third section from the output signal of the gyro-sensor to convert the output signal of the gyro-sensor into an offset-free signal. <IMAGE>
申请公布号
DE69507200(D1)
申请公布日期
1999.02.25
申请号
DE1995607200
申请日期
1995.06.01
申请人
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., KADOMA, OSAKA, JP