A high-precision frequency measurement system based on moving radiation source

Abstract

The invention discloses a high-precision frequency measurement system based on a moving radiation source, which belongs to the technical field of frequency measurement. It includes a reference signal source module, a measured signal source module, a first frequency conversion module, a second frequency conversion module, an analog signal processing module, a frequency divider module, a phase-locked frequency multiplication module, a pulse edge extraction module, and different frequency quantization Phase detection module, phase difference pulse processing module, pulse counting module and counting value storage module. The invention adopts the different-frequency quantization phase identification processing method, which can greatly improve the accuracy of frequency measurement, and strengthen the survivability and safety reliability of the system under complex backgrounds, which is an important improvement on the prior art.

Description

technical field [0001] The invention relates to the technical field of frequency measurement, in particular to a high-precision frequency measurement system based on a moving radiation source. Background technique [0002] Frequency measurement is one of the key problems to be solved in the field of precision measurement physics. The solution of this problem is helpful for the transmission and comparison of time and frequency, the measurement and suppression of phase noise, and the improvement of the accuracy of the new atomic frequency standard, and is beneficial to the entire satellite navigation system and The further development of equipment technology plays a strong role in promoting. The current traditional frequency measurement system is based on pulse counting, and there are two main defects: one is limited by the filling pulse frequency, and the other is the counting error of ±1 word. In order to reduce this defect and improve the measurement accuracy, it is more p...

AI Technical Summary

Problems solved by technology

At present, the traditional frequency measurement system is based on pulse counting, and there are two main defects: one is limited by the filling pulse frequency, and the other is the counting error of ±1 character

In order to reduce this defect and improve the measurement accuracy, it is more popular in the world to use various frequency measurement methods comprehensively. For example, combining the analog interpolation method and the time cursor method can reduce the counting error of ±1 to 1 / 1000 or so, the measurement accuracy can reach the picosecond level, but the implementation of this method is complicated in circuit design and high in instrument cost, which limits its wide application

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