Fast frequency measuring system and method

Abstract

The present invention relates to a quick frequency measurement system and its method, belonging to the field of communication technology. Said system includes frequency regulator, frequency measurer and control processor. Said invention utilizes the frequency regulator to regulate tested signal and reference signal, prolong testing time length of tested signal, raise frequency of reference signal so as to obtain high-frequency count pulse, then the frequency measurer can utilize the above-mentioned high-frequency count pulse to measure regulated tested signal.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a fast frequency measurement system and method. Background technique [0002] At present, more and more attention is paid to the research of frequency measurement methods in measurement and control systems, because frequency signals are strong in anti-interference, easy to transmit, and can achieve high measurement accuracy. Therefore, various non-frequency sensing signals must be converted To measure the frequency, the commonly used frequency measurement methods are: direct frequency measurement method and multi-cycle synchronous frequency measurement method. [0003] The direct frequency measurement method is the simplest frequency measurement method, which is to fill in pulses in a given gate signal, and obtain the number of filled pulses through necessary counting circuits, thereby calculating the frequency or period of the signal to be measured . [0004] In the mea...

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Problems solved by technology

[0007] The main disadvantage of this direct frequency measurement method is: due to the existence of ±1 word error, it is difficult to achieve equal accuracy measurement at both low frequency and high frequency, so the measurement accuracy is low

[0013] Under the requirements of fast measurement, in order to achieve higher measurement accuracy, the gate time needs to be shortened, so a higher time base frequency must be used, which may increase the cost. At the same time, the frequency of the time base pulse cannot be increased without limit. Therefore, the multi-period synchronous frequency measurement method cannot take into account the fast and high-accuracy frequency measurement requirements

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