A fast identification method for seismic events based on initial vibration signals

Abstract

The invention discloses a method for quickly identifying a seismic event based on an initial vibration signal. A detected initial 1.5-second vibration signal is analyzed in time domain and frequency domain; a variety of judgment criteria composed of vibration amplitude and main frequency components are established; and whether the event causing vibration is a seismic event or a non-seismic event (such as blasting, collapse, transportation, construction, mechanical work or electromagnetic interference) is quickly identified according to the judgment criteria. Through the method, whether an event is a seismic event can be accurately judged according to a 1.5-second vibration signal. The algorithm is simple and easy to use, and has good timeliness, accuracy and practicability. The method caneffectively prevent a seismic event from being missed or misreported, and is suitable for seismic monitoring and seismic warning.

Description

Technical field [0001] The invention relates to a method for quickly identifying seismic events based on initial vibration signals, which is mainly used to determine whether the initial vibration signals are generated by earthquakes. Background technique [0002] Earthquake disasters can cause casualties, destroy man-made structures, and trigger secondary disasters such as fires, floods, mudslides, tsunamis, and nuclear leaks, seriously jeopardizing social and economic development. In earthquake monitoring and earthquake early warning, after monitoring the vibration caused by the earthquake, if it can be judged in real time that the vibration is caused by the earthquake, then a warning can be issued to the public, which can make industrial equipment or civilian equipment immediately initiate emergency measures, such as the public Earthquake self-rescue can be done quickly, nuclear power plants can take emergency measures, high-speed railways can be speeded down or shut down quick...

AI Technical Summary

Problems solved by technology

[0003] 1) poor timeliness

Earthquake monitoring and earthquake early warning are both second-level real-time data processing systems. The faster the identification of earthquake events, the better. The current identification method must complete the identification after detecting the signal for 3 seconds at the earliest, which fails to give full play to the system. Timeliness;

[0004] 2) Poor accuracy

In actual application, current seismic event identification methods only identify a certain type of non-seismic event and seismic event in the application environment, but cannot take into account the identification of multiple non-seismic events, making the accuracy of seismic event identification poor;

[0005] 3) Poor practicality

The current earthquake event identification method has complex algorithm principles, difficult programming implementation, and high requirements for software and hardware support environments, so its realizable cost in practical applications is high.

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