Method of correcting zero point of gyro and apparatus therefor

Details Method of correcting zero point of gyro and apparatus therefor Method of correcting zero point of gyro and apparatus therefor

G - Physics

01

P

79/10

G01P 21/00 (2006.01) G01C 25/00 (2006.01)

Patent

CA 1325904

TITLE OF THE INVENTION "METHOD OF CORRECTING ZERO POINT OF GYRO AND APPARATUS THEREFOR" ABSTRACT OF THE DISCLOSURE A method of correcting a zero point of a gyro, comprises the steps of detecting a speed of a moving body and outputting a speed signal corresponding to the speed; determining with the speed signal whether the moving body is at a stopping condition; computing an average value of output values of the gyro within a constant time in which the moving body is at the stopping condition, and setting the average value to a new zero point of the gyro; and correcting an output value of the gyro with the new zero point. An apparatus for correcting a zero point of a gyro, comprises a speed sensor for detecting a speed of a moving body and outputting a speed pulse signal corresponding to the speed; a flip-flop circuit which is set by the speed pulse signal of the speed sensor; and a zero-point correcting circuit wherein it is determined with a level of an output of the flip-flop circuit and with an output of a timer whether the moving body is at a stopping condition and wherein a zero point of the gyro is corrected with an average value of outputs of the gyro at the time the moving body is at the stopping condition, the zero point correcting circuit outputting a clear signal to the flip-flop circuit, the flip-flop circuit being cleared by the clear signal and then set by the speed pulse signal.

611280

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