National benchmark controlled local time standard generating system and method

A time standard and generation system technology, which is applied to radio-controlled timers, instruments and instruments using atomic clocks, etc., can solve the problems of no related application of time value transfer and inability to transmit time value of satellite navigation products, etc. The effect of passing

Active Publication Date: 2014-12-24
北京市计量检测科学研究院
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Problems solved by technology

At present, the GPS common-view technology has developed quite maturely, but domestically, the common-view method has not yet been used to trace the driving time scale of the national benchmark, while the foreign GPS common-view tech

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  • National benchmark controlled local time standard generating system and method
  • National benchmark controlled local time standard generating system and method
  • National benchmark controlled local time standard generating system and method

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Embodiment Construction

[0045] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0046] The present invention uses the rubidium atomic frequency standard, GPS dual-frequency receiver and time interval counter to build a set of GPS common-view time transfer system to generate a standard format file conforming to the International Bureau of Weights and Measures; use the locally generated standard file to compare with the standard file of the China Institute of Metrology Yes, generate Beijing local standard time UTC (BIM), and make UTC (BIM) synchronize with national time reference UTC (NIM) within ±10ns.

[0047] The GPS receiver is connected to the computer through the serial port 1, and the time interval counter is connected to the computer through the serial port 2. The GPS receiver and the rubidium atomic frequency standard (ie figure 1The local atomic clocks in ) are respectively connected to the time interval counters. The time interval count...

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Abstract

The invention provides a national benchmark controlled local time standard generating system and method and belongs to the field of time frequency calibration. The national benchmark controlled local time standard generating system comprises a GSP (global position system) receiver, a time-interval counter, a local atomic clock and a computer; the GSP receiver and the time-interval counter are respectively connected with the computer; the GSP receiver and the local atomic clock are respectively connected with the time-interval counter; the time-interval counter takes a 1pps (pulse per second) signal outputted by the local atomic clock as a door opening pulse and a 1pps signal outputted by the GSP receiver as a door closing pulse, the difference value between the two pulses per second is measured to be the time-interval measurement value; the computer generates a local standard format file by the aid of the different value and information acquired by the GSP receiver; the local standard format file and a standard file generated according to national standard are then compared to generate local standard time.

Description

technical field [0001] The invention belongs to the field of time-frequency calibration, and in particular relates to a system and method for generating a local time standard controlled by a national standard. Background technique [0002] Time is one of the seven basic physical quantities in the International System of Units, and it is the physical quantity with the highest accuracy among all physical quantities at present. The applications of time frequency range from major scientific experiments to daily life consumption, and their uses are very wide. With the rapid development of the satellite navigation industry, the demand for testing of navigation-related products continues to expand. The accuracy and stability of navigation products and equipment are based on the accurate time value of the satellite receiving module, so the accurate time value of the satellite receiving module is the basis for ensuring the accuracy and reliability of navigation equipment data. The ...

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Application Information

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IPC IPC(8): G04R20/02G04F5/14
Inventor 姚和军黄艳高源张晗梁炜许原吴锦铁高春柳
Owner 北京市计量检测科学研究院
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