Method, system, terminal equipment and readable storage medium for measuring extremely low frequency vibration by a low frequency vibration sensor

Abstract

The invention discloses a method, system, terminal equipment and readable storage medium for measuring extremely low-frequency vibration by a low-frequency vibration sensor. characteristics and phase-frequency characteristics; use the low-frequency vibration sensor to measure and obtain the time-domain waveform diagram of extremely low-frequency vibration; perform spectrum analysis on the time-domain waveform diagram of a specified period to obtain its spectrum characteristic value; use the frequency of the extremely low-frequency band of the sensor The characteristic value of the frequency spectrum of the measured extremely low-frequency vibration is corrected by the response characteristics; a set of sine waves of the fundamental frequency and the multiplier frequency are generated with the corrected frequency spectrum and superimposed on the phase to obtain the corrected time-domain waveform diagram of the extremely low-frequency vibration, thereby realizing Accurate measurement, analysis, calculation and storage of extremely low frequency vibrations. The invention solves technical problems such as large error and unreliable data in the measurement of extremely low-frequency vibration in the prior art, and improves the reliability and accuracy of extremely low-frequency vibration measurement.

Description

technical field [0001] The invention relates to the field of vibration measurement of hydraulic units, in particular to a method, a system, a terminal device and a readable storage medium for measuring extremely low-frequency vibration by a low-frequency vibration sensor. Background technique [0002] With the increase of society's demand for electricity and the improvement of people's awareness of environmental protection, the importance of hydropower has gradually increased. The hydropower reserves of my country's rivers reach 680 million kilowatts. At present, 340 million kilowatts of developed installed capacity have been developed, and the annual power generation capacity is 1.2 trillion kilowatt-hours. [0003] At present, my country has built more than 47,000 small hydropower stations with an installed capacity of less than 50,000 kilowatts, with a total installed capacity of about 79.27 million kilowatts; 479 medium-sized hydropower stations with an installed capacit...

AI Technical Summary

Problems solved by technology

However, when the existing technology center tests the vibration of the hydraulic unit, the accuracy of the detection of low-frequency or even extremely low-frequency vibration signals is not satisfactory, and the operating status of the hydraulic unit cannot be effectively monitored. The stability of the hydraulic unit during operation has a great adverse effect

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