Device and method for automatically repairing rubidium atom frequency-standard frequency drift

Abstract

The invention discloses a device for automatically repairing rubidium atom frequency-standard frequency drift, which comprises an A / D (analog to digital) sampling module, a frequency drift detection module, a control module, a D / A (digital to analog) conversion module, and a constant current source driving module, wherein the A / D sampling module is used for sampling voltage of a C field coil and performing analog-to-digital conversion; the frequency drift detection module is used for calculating frequency drift; the control module is used for establishing a reference table of the frequency drift and digital voltage signals of the C field coil and choosing the digital voltage signal of the C field coil from the reference table and outputting the chosen digital voltage as a voltage preset value according to the frequency drift detected in real time; the D / A conversion module is used for obtaining an analog voltage preset value by performing digital-to-analog conversion for the voltage preset value; and the constant current source driving module is used for acquiring the voltage of the C field coil, amplifying the voltage value of the C field coil at the same phase, and then comparing the amplified voltage value with the analog voltage preset value to obtain a difference value, and generating a regulated voltage according to the amplified difference value to act on the C field coil. By using the device provided by the invention, the rubidium atom frequency-standard frequency drift can be automatically repaired and the stability of system can be increased. The invention also discloses a method for automatically repairing rubidium atom frequency-standard frequency drift.

Description

technical field [0001] The invention relates to the field of passive rubidium atomic frequency standards, in particular to an automatic repair device and method for frequency drift of rubidium atomic frequency standards. Background technique [0002] With the development of modern technology, more stable and precise time-frequency signals are required in many fields, and traditional mechanical timing and crystal oscillator timing can no longer meet the needs. The atomic frequency standard has extremely high stability and accuracy, so it has been used more and more widely. Among them, the rubidium atomic frequency standard is small in size, light in weight and good in performance, thus occupying a large market share. [0003] The rubidium atomic frequency standard mainly includes voltage-controlled crystal oscillators, physical systems and electronic circuits. The physical system specifically includes a spectral lamp that generates pumping light, an integrated filter resona...

AI Technical Summary

Problems solved by technology

However, on the one hand, since the temperature of the spectral lamp or the temperature of the microwave cavity has a great relationship with the short-term stability of the rubidium atomic frequency standard, changing the temperature of the spectral lamp or the temperature of the microwave cavity will seriously affect the short-term stability of the rubidium atomic frequency standard

On the other hand, since the existing methods for correcting frequency drift cannot automatically correct the rubidium atomic frequency standard, the rubidium atomic frequency standard will still have frequency drift after long-term work

On the other hand, for different rubidium atomic frequency standards, their physical systems and electronic circuit structures are different, and the existing methods for correcting frequency drift cannot be used to correct rubidium atomic frequency standards with different structures, thus making the existing methods for correcting frequency drift unique very limited

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