The Application Of The Generalized Phase Measurement And Processing In The Time-frequency Measurement And Link

All of the measuring system or measurement equipment have the problem of limited resolution, improving the resolution of the measurement equipment has been dedicated to solving the key job in the measurement and instrument field. A prominent advantage of the phase measurement and processing in time and frequency measurement field even more widely in the field of physical measurement is higher resolution. The traditional phase measurement and processing can only be done under the condition of the same nominal value and it contains complex frequency transformation,so its applications are restricted. This paper puts forward a method of generalized phase measurement and processing, discusses the phase relationship between the periodic signals in detail, and expounds the relation between the new concepts and the theory of group cycle. Finally the paper illustrates the application of the generalized phase measurement and processing in time and frequency measurement and control and frequency link, realizes directly phase or time comparison between the big difference frequency signals. Compared with the traditional comparison method, this expands the scope of frequency measurement and improves the accuracy of the measurement.This paper introduces in detail the application of the generalized phase processing technology in time and frequency measurement and control technology and frequency link from three directions. In the high-resolution frequency measurement, according to the fuzzy area and its edge stability, three methods of conversing discrete fuzzy area to focus fuzzy zone conversion are proposed, and high-precision frequency measurement solutions are given through one of the three methods.In the high-precision phase measurement, the intermediary source frequency is added and the phase measurement principle is analyzed, and combined with the self-calibration test in same frequency and source and interoperable test in different sources and frequency, the feasibility of the program is verified and the measurement accuracy is improved. In the frequency connection technique, the measurement principle and experimental programs of special high-frequency are given,and by analyzing the frequency link improvement program in rubidium atomic clock, the application of generalized phase processing technology gets discussed. In short, these three application examples described the role and the specific value of the generalized phase process. And all of them have achieved a direct phase comparison for frequency signals with great frequency differences. This makes the hardware circuit eliminates the need for mixing links, and reduces the local noise of the system. Finally, the generalized phase processing concept is extended to the field of the physical measurements out of time-frequency measurements. The example of measuring small voltage by AD converter illustrates the application prospect of generalized phase process, and gives the relationship between the fuzzy zone edges and measurement error. The generalized phase measurement and processing provides a new way of thinking for the future high-precision physical measurements.