陀螺定向的测时精度研究

ON THE TIME MEASURING ACCURACY IN GYROSCOPICORIENTATION

由于“跟踪逆转点法”存在一些缺点，所以近来照准部处于固定状态的各种记时法得到重视与应用，从而有必要对测时精度进行实验研究。本文采用录相机录下陀螺仪灵敏部的摆动情况，然后反复播放录相，由不同人员用电子秒表对光标通过不同分划线的时间进行测定，对大量观测数据进行方差分析和计算，求出测时精度m_t。在此基础上，提出合理的测时限差规定和一些实用结论。

Owing to the fact that there exist some shortcomings in the tracking-of-reversal- points method. various time recording methods by keeping fixed the alidade of the gyro- theodolite have received considerable appreciation and application recently. The need thus arises to test the time measuring accuracy. This paper describes the test and pre- sents the results therefrom. In the test. a video tape recorder is used to record severa1 swing cycles of the sensitive part of the gyrotheodolite. The tapes are then played. sev- eral persons observe and measure the time when the optical mark passes different divi- sion lines by means of electronic stopwatch. Time measuring accuracy is estimated by variance analysis of a large amount of observation data. On this basis. some useful con- clusions are drawn and reasonable tolerance for time measuring proposed.