| 摘要 |
PURPOSE:To enable accurate measurement of a compass direction angle, by installing liquid wedge that can be assumed as absence of pendulum length and photoelectric automatic collimator. CONSTITUTION:A liquid wedge 16 is arranged in parallel light beam baths composed of a reflecting mirror M2 fixed in the 1st symbals frame 3 and an integrally constructed photoelectric automatic collimator 14 and by the collimator 14 and the liquid wedge 16 an inclination of the earth rotation is measured photoelectrically and by amplifying this signal, an electric power proportional to the inclination angle is applied to a torque motor 10 and magnetic exciting coil 9 and by this arrangement a period of the precession is accelerated pronouncedly and the true and false error by the horizontal velocity is removed. When the gyromotor starts the recession, when an output of the collimator 14 exceeds a certain value in the neighborhood of a point where the true ratio compass direction is passed, an instantaneous braking electric current proportional to the inclined output is introduced or the braking electric current of the constant pulse width and the constant current intensity is introduced with a frequency proportional to the angle of inclination to a torque motor for setting the precession to the true ratio direction at one or several trials.
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