System and method for synchronizing one frequency output by multiple different frequency sources
A technology of frequency output and frequency source, applied in the field of frequency fusion, can solve problems such as difficulty in unifying to the same frequency, different accuracy of frequency output, and influence of frequency use
Active Publication Date: 2019-01-04
郑州威科姆科技股份有限公司
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[0002] At present, there are many different frequency equipment in the communication, transportation and electric power industries, and there are many types of frequencies generated by them, such as 10MHz, 2Mbit, 2MHz and 1PPS, etc. Different frequency indicators are also different, and the frequency output caused by new and old equipment is accurate. The degree is also different, it is difficult to unify to the same frequency, which has a great impact on the use of the back-end frequency
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[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0033] The present invention provides a system for synchronizing one frequency output with multiple different frequency sources, see figure 1 , including the following functional units:
[0034] ① The monitoring unit is used to monitor the status of the multi-channel different-frequency frequency sources input by the system and the output frequency of the system.
[0035] It allows a variety of different frequency source inputs, and monitors the status of each frequency source. It mainly monitors whether each input frequency source and system output frequency exceed the limit, and compares the period of the frequency source with the threshold period by measuring, see figure 2 . The monitoring unit counts the time value between the two rising edges of the frequency source, and accumulates the timing T r After taking the average to...
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The present invention provides a system of synchronizing a plurality of different frequency sources into one frequency to output. The system comprises a monitoring unit, a control unit, a locking unit, an output unit and a clock unit. The present invention also provides a method of synchronizing a plurality of different frequency sources into one frequency to output. The method comprises the steps of using the monitoring unit to monitor the states of the plurality of different frequency sources inputted by a system and a system output frequency; using the control unit to select a tracking frequency source from the plurality of different frequency sources according to a state monitoring result of the monitoring unit; using the locking unit to realize the frequency locking and the phase locking of the system output to the tracking frequency source; using the output unit to enable the locked tracking frequency source to generate into an appointed frequency to output via a digital phase-locked loop. According to the present invention, the frequencies generated by different frequency devices can be unified into one frequency, the different frequency sources can be synchronized into one frequency to output, and the back-end fixed frequency output is not influenced no matter how the front-end frequency source changes.
Description
technical field [0001] The invention relates to frequency fusion, which is mainly used for the fusion of multiple frequency sources of time equipment, and in particular to a system and method for fusing multiple frequency sources of different frequencies into one fixed frequency output. Background technique [0002] At present, there are many different frequency equipment in the communication, transportation and electric power industries, and there are many types of frequencies generated by them, such as 10MHz, 2Mbit, 2MHz and 1PPS, etc. Different frequency indicators are also different, and the frequency output caused by new and old equipment is accurate. The degrees are also different, and it is difficult to unify to the same frequency, which has a great impact on the use of back-end frequencies. Therefore, there is a need for a frequency source that can synchronize different frequencies into one frequency output, no matter how the front-end frequency source changes, it wi...
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IPC IPC(8): H04L7/033H03L7/08
Inventor 贾小波陈俊杰吴淑琴李波张蕊杨振敏
Owner 郑州威科姆科技股份有限公司