''Beidou No.1'' satellite navigation system and GPS mutually preparing time service method and apparatus |
Title： |
| ''Beidou No.1'' satellite navigation system and GPS mutually preparing time service method and apparatus |
|
Application Number： |
200410009685 |
Application Date： |
2004/10/20 |
Announcement Date： |
2005/04/27 |
Pub. Date： |
|
Publication Number： |
1609628 |
Announcement Number： |
|
Grant Date： |
|
Granted Pub. Date： |
|
ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
G01S 5/02, H02J 13/00, G04G 7/00, G04G 7/02, G06F 1/12, G06F 13/38 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Xie Xiaorong, Li Jian, Wu Jingtao |
Key Words： |
''Beidou No.1'', satellite navigation system, GPS, mutually preparing time service method, apparatus |
Abstract： |
The present invention is the interactive BD and GPS time transmission equipment and method and belongs to the field of automation of electric power system. The present invention features that BD minute pulse and GPS second pulse are led into monochip computer and compared with the frequency doubled vibration to obtain the accumulated error between the integral minute clock of the crystal vibrator and the integral minute clock of BD and the accumulated error between the second clock of the crystal vibrator and the second clock of GPS; the deviation of crystal vibrator clock to the standard clock is estimated in second interval in the time transmission algorithm; the crystal vibrator vibration number of the next second is determined based on the deviation and written into the counter; and precise second pulse is formed and output when the frequency doubled vibration count and the count in the counter is equal. The corresponding equipment is also proposed. |
Claim： |
|
Priority： |
|
PCT： |
|
LegalStatus： |
|
Relevancy information
