Rapid measurement method and device of super-low-frequency vibration parameter quantity value

Abstract

The invention relates to a rapid measurement method and device of a super-low-frequency vibration parameter quantity value and belongs to the technical field of mechanical measurement. The measurement method utilizes a partial waveform which is less than one waveform period to obtain the amplitude value and frequency of a vibration signal so as to realize rapid measurement of super-low-frequency vibration. The measurement device comprises vibration sensing equipment, a data collection system and computer data processing equipment. According to the method and the device, a virtual instrument manner is utilized to realize the rapid measurement of a super-low-frequency sine vibration signal amplitude value and a frequency value, so that the quantity values of the vibration amplitude, the frequency and the like can be obtained by only using one part of the waveform which is less than one cycle to achieve the effect of super-low-frequency rapid measurement and real-time refreshing data; and the condition in a traditional vibration measurement method that the measurement of the amplitude and the frequency can be carried out by sampling a plurality of waveform periods is avoided; and according to the invention, a super-low-frequency vibration measurement system, measurement equipment and the like can be manufactured, and the method and the device can be used for measurement calibration of super-low-frequency vibration parameters.

Description

technical field [0001] The invention relates to a method and device for quickly measuring ultra-low frequency vibration parameter values, belonging to the technical field of mechanical measurement. Background technique [0002] Vibration is a very basic physical phenomenon in nature. Vibration measurement technology is one of the basic technologies in the field of mechanical measurement and testing, which is of great significance and far-reaching influence. The measurement of many application occasions needs to obtain the value of velocity, displacement and acceleration. Most of these sensors are calibrated and calibrated by means of vibration measurement. In the field of mechanics, the fatigue characteristics test of materials with far-reaching influence and the fixed life test of large equipment such as aircraft Equivalence is achieved through vibration and how it is measured. Other occasions such as seismic monitoring, oil exploration, nuclear test monitoring, etc. requi...

AI Technical Summary

Problems solved by technology

[0004] In vibration measurement, the mathematical expression is represented by a sine wave, and the determination of its amplitude, frequency and other parameters usually requires multiple cycles of the vibration waveform. In most cases, good results can be obtained, but in the face of super When measuring low-frequency vibrations, there is a problem that the measurement response time is too long

For example, the ultra-low frequency vibration table used in earthquake monitoring technology has a vibration cycle of 1000s, and it takes a long time to generate a cycle waveform. According to the traditional vibration measurement method, the measurement system cannot obtain relevant vibration in such a long time. The parameter information can only be measured to obtain a section of vibration waveform

This also makes it difficult to quickly obtain information such as the amplitude and frequency of ultra-low frequency vibration, and it is difficult to achieve real-time refresh of the measured values ​​of parameters such as vibration amplitude and frequency

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