Studies on time comparison technology of unified time controller of survey vessels

This paper takes the alert problem of the unified time controller as the point of penetration, and then, by analyzing the time comparison principle of the controller, it could be concluded that the time comparison mechanism is flawed. When there is not any reference source of “time comparison consensus”, two pieces of reference source time whose time flags are “reliable” are not equal, and correct discrimination could not be achieved, leading to the alert of all the time. By upgrading controller software, adding new discrimination conditions, When there is not any reference source of “time comparison consensus”, clearing all the comparison results of reference source time, comparing all the reference source time and generator time, and deciding if all the time is of consistency according to the principle of large number decision, the wrong discrimination of the correct time is avoided. This method improves the time comparison mechanism of the controller, increases the precision and correctness of time difference measurement, and is of highly popularizing value for the improvement of unified time synchronization.