Single-chip microcomputer-based weak signal frequency and phase automatic detection system and detection method thereof

Abstract

The invention discloses a single-chip microcomputer-based weak signal frequency and phase automatic detection system and a detection method thereof. The single-chip microcomputer-based weak signal frequency and phase automatic detection system includes a coupler and a power source module; the coupler is connected with a first-stage amplification circuit, a second-stage amplification circuit, a shaping circuit, a frequency division circuit and a single-chip microcomputer system sequentially; one end of the single-chip microcomputer system is connected with a display module and a storage module respectively; the first-stage amplification circuit is connected in series with an amplitude detection circuit which is connected in parallel with the second-stage amplification circuit; one end of the amplitude detection circuit is connected with the single-chip microcomputer system; the coupler is connected with a phase detection circuit; one end of the phase detection circuit is connected with the single-chip microcomputer system; and the power source module supplies power for the whole system. According to the single-chip microcomputer-based weak signal frequency and phase automatic detection system and the detection method thereof of the invention, single-chip microcomputer control is adopted, and multi-stage amplification technology is utilized, and a frequency divider and a trigger are combined with each other, and therefore, the detection method can be realized, and high-performance intelligent signal automatic detection can be realized. The system and method of the invention have the advantages of high automation degree, high speed, high measurement efficiency, high safety performance and convenient operation.

Description

technical field [0001] The invention relates to information detection and control technology, in particular to a single-chip microcomputer-based weak signal frequency and phase automatic detection system and a detection method thereof. Background technique [0002] In electronic technology, frequency is one of the most basic parameters, so the measurement of frequency is particularly important, and a frequency meter is an electronic measuring instrument specially used to measure the frequency of the signal under test. [0003] In electronic technology, frequency and phase are the most important and basic parameters, and are closely related to the measurement scheme and measurement results of many electrical parameters. other fields are very important. [0004] At present, most common frequency meters are composed of signal input circuit, signal processing circuit and counting display circuit. This type of frequency meter has fast response speed and low cost. In 2010, Qian ...

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Problems solved by technology

[0005] The above existing technologies have certain use value, but the frequency band of these systems is narrow, the performance is unstable, and the frequency of complex and variable signals cannot be measured, and the waveform of the signal cannot be accurately measured by many technical methods in the measurement process , the shaping of the signal is not ideal, and the phase of the signal cannot be measured at the same time. Therefore, the application of these systems and methods is narrow, which limits their application in electronic measurement

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