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Precise domestication conserving method of second-level frequency scale

A frequency standard and tame technology, which is applied in the field of precision taming and keeping of secondary frequency standards, and can solve the problems of blank precision taming and keeping technology.

Active Publication Date: 2009-10-21
西安华伟电力电子技术有限责任公司
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Problems solved by technology

Therefore, the precision taming and maintenance technology for the secondary frequency standard is basically still blank in China.

Method used

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  • Precise domestication conserving method of second-level frequency scale
  • Precise domestication conserving method of second-level frequency scale
  • Precise domestication conserving method of second-level frequency scale

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Embodiment Construction

[0023] Concrete implementation scheme of the present invention is as follows:

[0024] The traditional method is to use high-accuracy standard signals provided by satellites such as GPS or ground-based standard transmitters to calibrate the secondary frequency standard. We consider that if the satellite signal is lost due to uncertain factors, the frequency standard is in the non-calibrated state. , and automatically compensate and adjust the frequency value of the frequency standard accordingly.

[0025] We propose a method for taming and maintaining a secondary frequency scale using the satellite's second signal. In principle, it needs to be emphasized that although pre-experimental methods can often be used to determine the relevant data of the secondary frequency standard, the data such as aging of the frequency standard is always changing during the long-term use of the frequency standard. In the short period of operation of the secondary frequency standard, the influenc...

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Abstract

The invention relates to accuracy correction of second-level frequency scale on the ground or on a satellite, in particular to a precise domestication conserving method of second-level frequency scale for maintaining original lock in lock-losing situation. In the locking process, controlling and correcting voltage of local frequency scale is obtained; the controlling and correcting voltage is analyzed along with changes of time and temperature; when the second-level frequency scale enters domestication conserving state, temperature data and aging data constructed in the locking process are integrated, thereby calculating compensation voltages of the second-level frequency at various moments and temperatures. The method of the invention uses time frequency signal transmitted by a satellite positioning and timing system to lock the second-level frequency scale, thereby outputting high-precision frequency signal; short-term stability of the method keeps a level the same as that of a local oscillator; and the method effectively reproduces long-term stability and accuracy while receiving standard time frequency signal on a local controlled frequency scale.

Description

technical field [0001] The invention relates to the technical field of correcting the accuracy of secondary frequency standards on the ground and on satellites, and in particular to a precision and tame method for maintaining the accuracy of the secondary frequency standard when the secondary frequency standard is in an out-of-lock state. Background technique [0002] The satellite positioning and timing system can provide high-precision standard time signals for long-distance transmission, and has high-precision timing, positioning and speed measurement capabilities, and has been widely used in military and civilian sectors. In the establishment of a standard time scale and the comparison, synchronization and unification of high-precision time and frequency, the standard time signal in the satellite positioning system information is often used. Using the time and frequency signal (such as the second signal) remotely transmitted by the satellite positioning timing system to ...

Claims

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Application Information

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IPC IPC(8): H03L7/00
Inventor 周渭孙永红张海峰
Owner 西安华伟电力电子技术有限责任公司
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