数字式方位陀螺仪

Digital Gyro-Directional Finder

介绍了一种由微型计算机控制,利用双位置施矩用以消除漂移影响、提高方位测定精度的新型数字式方位陀螺仪.文中阐述了它的构造原理,并对其误差因素和关键技术问题作了简要的说明.

Magnetic compass or astronomical method is inapplicable to determining direction of underground gallering in coal mines.To satisfy the need of coal mines,the authors propose the digital gyro-directional finder and believe that it is the first time such a proposal is made.Its main feature is:making use of microcomputer control,it realizes automatic moment loading on the two positions for eliminating the day-to-day drift of gyroscope,making improved azimuth angle measurement possible. In this paper eight formulas for computing azimuth angles are given:equations(1-8).Errors of com- puted azimuth angles corresponding to the remains of gyrodrift,the errors of latitude inputted in comput- er and the leveled errors of instrument base,can be computed respectively by equations (12),(13) and (14). The author's analysis show that,only equations(13) and (14) need to be considered.For latitude(?)=60°, azimuth angle α=30°,remain of gyrodrift Δε=0.003°/h,simulation calculations show that error of computed azimuth angle Δα_(?)≈1.5'. Laboratory investigation is being conducted in order to hasten the day of the actual use of the pro- posed instrument in coal mines.