Infrasound source orientation method based on PMCC algorithm

An infrasound source and infrasound technology, applied in the direction of electrical components, can solve problems such as misorientation, and achieve the effect of avoiding misorientation

Inactive Publication Date: 2013-10-23
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] At present, foreign CTBTO organizations use the PMCC algorithm to orient the infrasound source through the infrasound sensor network. However, in the PMCC algorithm, the variance index of speed and direction is set based on empirical values, resulting in the possibility of misorientation.

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  • Infrasound source orientation method based on PMCC algorithm
  • Infrasound source orientation method based on PMCC algorithm
  • Infrasound source orientation method based on PMCC algorithm

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Embodiment Construction

[0039] Such as figure 1 Shown, the process of the present invention is as follows:

[0040]In the first step, 15 infrasound calibrators will be used to generate 15 calibration signals to calibrate the infrasound sensor. The 15 calibration signals output by the infrasound calibrator are sinusoidal signals with an amplitude P of 5 Pa and a period Ti (i=1 , 2,...,15) are 1s, 1.74s, 3.06s, 5.99s, 8.53s, 10s, 17.4s, 30.6s, 59.9s, 85.3s, 100s, 174s, 306s, 599s, 853s, respectively. The calibration signal measured by the infrasound sensor is used to calculate the frequency sensitivity curve of the infrasound sensor. The calculation method of the frequency sensitivity curve is to divide the peak values ​​Vi (i=1, 2, ..., 15) of the obtained 15 sets of calibration sinusoidal signals by P to obtain Ti (i = 1, 2, ..., 15 ) corresponding frequency sensitivity Ki (i=1, 2, ..., 15), carry out cubic spline interpolation to 15 groups of frequency sensitivities Ki to obtain the frequency sens...

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Abstract

The invention relates to an infrasound source orientation method based on a PMCC algorithm. The method is characterized in that an infrasound sensor is calibrated through a number of calibration signals generated by an infrasound calibrator, high frequency points and low frequency points of cut-off frequency points on an infrasound sensor frequency sensitivity curve are obtained through calibration data, further diaphragm performance constant error and phase error of a single infrasound sensor are calculated, speed error and phase error generated by a single sensor and speed error and phase error of a sensor network consisting of a number of infrasound sensors are obtained, finally the speed error and the phase error are used as parameters for calculating weighting distance among detection elements in the PMCC algorithm, and an infrasound source orientation graph is obtained based on the PMCC algorithm. The infrasound source orientation method based on the PMCC algorithm is characterized in that the speed error and phase error of a network are objectively described, orientation faults which are caused because the speed error and phase error are conventionally set according to experience in the PMCC algorithm can be prevented, the calculation is simple, and convenience of project realization is realized.

Description

technical field [0001] The invention relates to a PMCC infrasound source directional algorithm, which realizes the purposes of infrasound propagation monitoring and infrasound source location produced by natural or artificial disasters. Background technique [0002] Long-term observations and research at home and abroad have shown that infrasound waves are generated during natural disaster events and man-made disaster events, and different types of disaster events can generate infrasound waves of different frequency bands. By arranging infrasound sensors in a large area to form a network monitoring system, real-time monitoring of infrasound information and mining of infrasound information can be achieved to monitor disaster events. [0003] At present, foreign CTBTO organizations use the PMCC algorithm to orient the infrasound source through the infrasound sensor network. However, in the PMCC algorithm, the variance indicators of speed and direction are set by empirical valu...

Claims

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Application Information

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IPC IPC(8): H04R29/00
Inventor 冯浩楠杨亦春
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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