Vibration signal grading judgment recognition method, rockfall energy scale computing method and rockfall risk early warning method

Abstract

The invention discloses a vibration signal grading judgment recognition method. On account of defects of lack of combination and using of multiple analysis methods and aiming at improving vibration signal analysis precision, the invention provides the vibration signal multistage recognition method achieving improving identification precision by adopting different signal analysis indexes and analysis methods on different identification stage layers and combining amplitude analysis, energy analysis and frequency analysis into one. According to the method, a computing center executes the steps of de-noising processing, signal I level identification of an amplitude index, signal II level identification based on FFT transformation and signal III level identification based on STFT transformation after subtracting an amplitude signal with an initial time, and finally judges whether target vibration occurs or not. The invention further discloses a rockfall energy scale computing method and a rockfall risk early warning method. The vibration signal grading judgment recognition method, the rockfall energy scale computing method and the rockfall risk early warning method have the advantages of being reliable in theory, scientific and simple in computing process, simple in implement apparatus, convenient to install, high in measuring result precision, and especially suitable for the demand of the engineering field.

Description

technical field [0001] The invention relates to a vibration signal grading judgment and recognition method, a rockfall energy scale calculation method and a rockfall hazard early warning method, belonging to the technical fields of vibration signal monitoring and measurement, disaster monitoring and early warning, and civil engineering. Background technique [0002] The vibration signal refers to the signal generated by the non-stationary object, and since the non-stationary state is the absolute state of the object, the vibration characteristics and the generated vibration signal become the inherent characteristics of the object. In the excited state, if the excitation of the vibration source is the same or close to the intrinsic characteristic parameters of the object, a resonance response will occur. The vibration response of an object is the superposition of the characteristic information of each frequency. The time-domain characteristics of the vibration signal are mai...

AI Technical Summary

Problems solved by technology

Missed recognition and false positives may lead to slow response, resulting in personal and property losses, and false recognition and false positives may result in ineffective response, resulting in unnecessary emergency investment, especially causing psychological fatigue and reduced vigilance of personnel.

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