Single station infrasonic wave signal recognition and extraction method

A technology of infrasonic signal and extraction method, which is applied in the measurement of ultrasonic/sonic/infrasonic waves, instruments, measuring devices, etc., can solve the problems of affecting the recognition accuracy, and achieve the effect of improving the recognition rate, improving the accuracy and reducing the cost.

Active Publication Date: 2017-02-08
NAT INST OF NATURAL HAZARDS MINISTRY OF EMERGENCY MANAGEMENT OF CHINA
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects of existing infrasound signal discrimination methods that the recognition accu

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  • Single station infrasonic wave signal recognition and extraction method
  • Single station infrasonic wave signal recognition and extraction method
  • Single station infrasonic wave signal recognition and extraction method

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Embodiment Construction

[0028] The present invention will be further described now in conjunction with accompanying drawing.

[0029] The single-station infrasonic signal rapid identification and extraction method of the present invention is based on the infrasonic signal received by a single infrasound monitoring station, based on the energy flow peak, zero-crossing rate, wind speed and wind noise, wavelet time-frequency characteristics, and effective event history signal characteristics. Five types of elements to realize the identification and extraction of abnormal signals. Wherein, the infrasound monitoring station includes at least: an infrasound sensor and a wind speed sensor.

[0030] Such as figure 1 As shown, the single-station infrasonic signal rapid identification and extraction method of the present invention specifically includes the following steps:

[0031] Step 1), a single infrasound monitoring station receives the infrasound wave signal;

[0032] Step 2), the received infrasonic ...

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Abstract

The invention relates to a single station infrasonic wave signal recognition and extraction method, which comprises the steps that a single infrasonic sound monitoring station receives infrasonic wave signals; abnormality recognition is performed on the received infrasonic wave signals based on four elements such as the energy flow peak, the zero-crossing rate, the wind speed and noise and wavelet time-frequency characteristics so as to find out a time period in which an abnormal moment is distributed, thereby acquiring four groups of time period sequences; comparative analysis is performed on the four groups of time period sequences to find out overlapped time periods in the four groups of time period sequences, the overlapped time period sequence is marked on the waveform of the infrasonic wave signals so as to be used for indicating the waveform and the location of valid event suspected signals, and then further recognition and classification are performed on the valid event suspected signals by using valid event historical signal characteristics, so that the type or the source of the infrasonic wave signals is judged.

Description

technical field [0001] The invention relates to the field of infrasonic wave monitoring, in particular to a single-station infrasonic wave signal identification and extraction method. Background technique [0002] There are always various infrasound waves in the air in the natural state. These infrasound waves come from a variety of infrasound wave sources, including wind cooling, typhoons, heavy rains, mountain torrents, mudslides, meteor showers, avalanches, ground subsidence, bolides, volcanoes, earthquakes, tsunamis and other natural Events are the main source of natural infrasound waves, as well as a variety of artificial infrasound sources, including artificial pulse infrasound sources such as nuclear explosions and chemical explosions. Infrasound waves propagate in the atmosphere with small attenuation and long distances, and can travel far and be monitored by infrasound observation equipment. Therefore, infrasound monitoring has become an effective means to study the...

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Application Information

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IPC IPC(8): G01H17/00
CPCG01H17/00
Inventor 郭泉杨选辉
Owner NAT INST OF NATURAL HAZARDS MINISTRY OF EMERGENCY MANAGEMENT OF CHINA
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