CN102004262A - Electromagnetic sky wave earthquake monitoring method - Google Patents
Electromagnetic sky wave earthquake monitoring method Download PDFInfo
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- CN102004262A CN102004262A CN 201010516230 CN201010516230A CN102004262A CN 102004262 A CN102004262 A CN 102004262A CN 201010516230 CN201010516230 CN 201010516230 CN 201010516230 A CN201010516230 A CN 201010516230A CN 102004262 A CN102004262 A CN 102004262A
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Abstract
The invention relates to an electromagnetic sky wave earthquake monitoring method. A short wave time service signal transmitted by a short wave time service station is received by a short wave receiving antenna and a short wave receiver; the short wave receiver receives a time service signal modulated by Schumann resonance (SR) in a communication process and mixes and filters a received signal to acquire a signal with a zero intermediate frequency; and an analogue to digital (A/D) convertor samples the signal, transmits the sampled signal to a data processing computer, extracts a demodulated SR signal, analyzes parameters such as the frequency, bandwidth, intensity and the like of each order, displays the signal on a display in the forms of graphic and table, compares the signal with a standard SR signal so as to judge whether the signal is the warning of abnormity and realize earthquake monitoring. High-frequency electromagnetic waves are received actively in a radio detection mode so as to acquire a disturbance signal related to an earthquake activity and provide earthquake forewarning information. The method has simple steps, can conveniently monitor earthquakes and is reliable. An earthquake is monitored by detecting the abnormity of the SR at the bottom of an ionized layer through high-frequency radio waves, so that electromagnetic sky wave earthquake monitoring is realized.
Description
Technical field
The present invention relates to a kind of earthquake electromagnetic monitoring technology, is a kind of sky wave earthquake electromagnetic monitoring method specifically.
Background technology
The affirmation that the earth's crust that takes place before macroseism and the volcano and troposphere electromagnetic coupled have obtained scientific circles in the time of not waiting in several days to several hours before the shake, can produce various anomalous of the ionosphere phenomenons around the tectonic stress zone.The multiple country of earthquakes such as Japan, Russia has proposed earthquake radio detection method, obtains the preceding various unusual coupled signal of shake.
Earthquake radio detection method, be also referred to as the active probe method, this method is monitored the electromagnetic signal of a certain fixed launching pad by spatial transmission, as navigation and broadcast singal etc., analyzing earthquake to atmosphere and ionospheric disturbance relation, is a kind of indirect earthquake electromagnetic observation method.The advantage of this method is to concentrate monitoring, assembles the quantity of seismic events easily, and any earthquake takes place near the great circle path of transmitted from transmitter to receiver in other words, all can embody in receiving data.
The radio detection method is divided into monitoring lower ionosphere ultralow frequency/extremely low frequency (VLF/LF) and propagates two kinds of methods of VHF broadcast singal exploration seismic-ionospheric disturbance on exploration seismic-ionospheric disturbance and the observation water plane according to the difference of monitor signal frequency range.Russia has carried out the observational study of artificial source's very low frequency (VLF)/low frequency (VLF/LF) signal the earliest.The radiowave of this frequency range is mainly used in radio broadcasting and navigational system, in earth-ionosphere waveguide, propagates, so the electromagnetic anomaly of portability seismic region on the travel path.Began the research of this project from 1996, Japan has used a VLF/LF network that is made of 7 receiving stations.Each station can receive the signal from 4 VLF transmitters and a LF transmitter.(30-300MHz) frequency range is used to do earthquake-atmospheric disturbance monitoring in Japan to VHF equally for Very High Frequency, very high frequency(VHF), and this method called after observation VHF above water transmits.Kushida etc. have found the abnormal occurrence of many broadcasting FM signals relevant with earthquake.They at first advise lacking with this VHF signal above water and face earthquake prediction, and afterwards, a lot of scientific research group of Japan has all begun the exploratory development to the mechanism and the reliability of this method.But these methods all the stable normal signal of neither one as a reference, the unusual judgement that seismic activity causes is fuzzy.Can find very tangible corresponding abnormal signal after the shake, and before shake, but be difficult to distinguish be before the shake unusually or other radio wave propagations unusual.
Summary of the invention
Technical matters to be solved by this invention is to overcome above-mentioned the deficiencies in the prior art, provide that a kind of monitoring is convenient, method is reliable, the sky wave earthquake electromagnetic monitoring method of carrying out seismic monitoring unusually by high frequency radio wave ionization detection layer bottom Schumann resonance (SR).
The technical scheme that the present invention solves the problems of the technologies described above employing is: a kind of sky wave earthquake electromagnetic monitoring method, it is characterized in that: radiothermy receiving antenna and short-wave receiver, receive time service platform shortwave time signal, this signal is in communication process, through d-layer when bottom and Schumann resonance SR signal interaction, and modulated by SR; Short-wave receiver receives the time signal after modulated, with the received signal mixing and filtering to zero intermediate frequency; After the A/D converter sampling, be delivered to data handling machine, extract the SR signal after the demodulation and analyze the parameters such as frequency, bandwidth and intensity on its each rank, on display, show, relatively judge whether to be unusual omen, thereby realize seismic monitoring with standard SR signal with figure and forms mode.
The present invention initiatively receives frequency electromagnetic waves by the radio detection mode, obtains the disturbing signal relevant with seismic activity so that information of earthquake to be provided, and observation signal is the Schumann resonance after the demodulation.Against existing technologies, the present invention is a kind of active earthquake electromagnetic monitoring means, step is simple, monitoring is convenient, method is reliable, carries out seismic monitoring unusually by high frequency radio wave ionization detection layer bottom Schumann resonance (SR), realizes sky wave earthquake electromagnetic monitoring.
Description of drawings
The present invention is further described below in conjunction with accompanying drawing.
Fig. 1 principle of work synoptic diagram of the present invention.
Label among the figure is: 1. short-wave antenna, 2. short-wave receiver, 3. data handling machine, 4. display.
Embodiment
A kind of sky wave earthquake electromagnetic monitoring method is set up 5M-10MHz short-wave antenna 1, is connected with short-wave receiver 2, receives the BPM shortwave time signal of China national time service center broadcast.This signal through d-layer when bottom and Schumann resonance SR signal interaction, and is modulated by SR in communication process.
The formation principle of Schumann resonance SR is: the earth and ionosphere have constituted a resonant cavity, the resonance frequency of this cavity is mainly determined by the size of the earth, the lightning activity that whole world thunderstorm produces produces wide band electromagnetic radiation, be equivalent to a current feedback circuit, global current balance type and ionosphere current potential have been kept in charging to ionosphere.The terrestrial waveguide effect is just as a resonator, and the electromagnetic wave of resonance frequency correspondence is at earth-ionosphere waveguide generation resonance, and the lightning radiation is exaggerated, and has promptly produced the earth-ionosphere cavity resonance.This resonance is Schumann resonance (SR).Table 1 is the Partial Feature parameter of Schumann resonance.The frequency stabilization of Schumann resonance, the side-play amount of each eigenfrequency is generally about 0.2Hz.As shown in table 1, the spectral density of each eigenfrequency correspondence of Schumann resonance presents variation diurnal periodicity, but amplitude of variation is little, numerical stability.
The characteristic parameter of table 1 Schumann resonance
| Characteristic | Vertical electric field | Horizontal magnetic field |
| Eigenfrequency | 7.8,14,20,26,33,39,45Hz | 7.8,14,20,26,33,39,45Hz |
| The eigenfrequency diurnal variation | ±0.5Hz | ±0.5Hz |
| Amplitude | ~100-200μVm -1Hz -1/2 | ~0.5-1pTHz -1/2 |
| The amplitude diurnal variation | ±50-100μVm -1Hz -1/2 | ~0.25-0.5pTHz -1/2 |
| Polarization | Linear (vertically) polarization | Linear (ellipse) polarization |
Schumann resonance can be measured in any place on earth, and its magnetic field intensity generally adopts the magnetic-field component in the low noise inductive coil measurement Dong-Xi Henan-north of two levels much smaller than the intensity of terrestrial magnetic field; Electric field generally adopts the vertical electric dipole antenna measurement.Because SR has parameter attributes such as stable frequency and intensity, daily observation can obtain stable normative reference signal.
BPM shortwave time signal of the present invention through d-layer when bottom and the interaction of Schumann resonance, and is modulated by SR in communication process.Short-wave receiver 2 receives the BPM signal after modulated, with the received signal mixing and filtering to zero intermediate frequency; By being delivered to data handling machine 3 after 24 the AD7734 sampling, extract the preceding 4 rank SR signals after the demodulation, correspondence analysis has also shown each rank centre frequency, bandwidth and time-dependent variation in intensity.The seismic activity meeting causes the SR abnormal parameters, obtains this abnormal signal and standard SR signal on ground and relatively judges whether to be unusual omen, thereby realize seismic monitoring.
The present invention initiatively receives frequency electromagnetic waves by the radio detection mode, obtains the disturbing signal relevant with seismic activity so that information of earthquake to be provided, and observation signal is the Schumann resonance after the demodulation.The present invention is a kind of active earthquake electromagnetic monitoring means, and step is simple, monitoring is convenient, method is reliable, carries out seismic monitoring unusually by high frequency radio wave ionization detection layer bottom Schumann resonance (SR), realizes sky wave earthquake electromagnetic monitoring.
Claims (1)
1. a sky wave earthquake electromagnetic monitoring method is characterized in that: radiothermy receiving antenna and short-wave receiver, the time signal of reception shortwave time service platform broadcast; This shortwave time signal through d-layer when bottom and Schumann resonance SR signal interaction, and is modulated by SR in communication process; Short-wave receiver receives the time signal after modulated, with the received signal mixing and filtering to zero intermediate frequency; By being delivered to data handling machine after the A/D converter sampling, extract the SR signal after the demodulation and analyze frequency, bandwidth and the intensive parameter on its each rank, on display, show, relatively judge whether to be unusual omen, thereby realize seismic monitoring with standard SR signal with figure and forms mode.
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| CN 201010516230 CN102004262A (en) | 2010-10-22 | 2010-10-22 | Electromagnetic sky wave earthquake monitoring method |
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| CN 201010516230 CN102004262A (en) | 2010-10-22 | 2010-10-22 | Electromagnetic sky wave earthquake monitoring method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301632A (en) * | 2015-11-30 | 2016-02-03 | 江苏省地震局 | Earthquake precursor Schumann resonance vertical electric field receiving device |
| CN108594315A (en) * | 2018-04-20 | 2018-09-28 | 江苏省地震局 | Electromagnetism of Earthquake disturbance observation system and observation procedure based on induction type magnetic sensor |
| CN109471158A (en) * | 2019-01-22 | 2019-03-15 | 张银海 | A method of it is predicted an earthquake using the variation of monitoring VLF electromagnetic radiation intensity |
| CN113406609A (en) * | 2021-06-04 | 2021-09-17 | 哈尔滨工业大学 | Method for detecting ionosphere burst abnormal structure by sky-wave radar |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997002499A1 (en) * | 1995-07-05 | 1997-01-23 | Geoforschungszentrum Potsdam | Earthquake monitoring |
| JP3188609B2 (en) * | 1995-07-13 | 2001-07-16 | 廣 加藤 | Electromagnetic noise detection and analysis equipment |
| CN2696211Y (en) * | 2003-12-19 | 2005-04-27 | 中国科学院国家授时中心 | Digital short-wave receiver |
| JP2006153830A (en) * | 2004-12-01 | 2006-06-15 | Kazuhide Meguro | Earthquake prediction device |
| CN101614825A (en) * | 2009-06-12 | 2009-12-30 | 余志鹏 | Earthquake monitoring and forecasting system |
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2010
- 2010-10-22 CN CN 201010516230 patent/CN102004262A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997002499A1 (en) * | 1995-07-05 | 1997-01-23 | Geoforschungszentrum Potsdam | Earthquake monitoring |
| JP3188609B2 (en) * | 1995-07-13 | 2001-07-16 | 廣 加藤 | Electromagnetic noise detection and analysis equipment |
| CN2696211Y (en) * | 2003-12-19 | 2005-04-27 | 中国科学院国家授时中心 | Digital short-wave receiver |
| JP2006153830A (en) * | 2004-12-01 | 2006-06-15 | Kazuhide Meguro | Earthquake prediction device |
| CN101614825A (en) * | 2009-06-12 | 2009-12-30 | 余志鹏 | Earthquake monitoring and forecasting system |
Non-Patent Citations (2)
| Title |
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| 《中国地震学会空间对地观测专业委员会2009年学术研讨会论文摘要集》 20091231 乔晓林 舒曼谐振波异常地震先兆监测技术 全文 1 , * |
| 《电子与信息学报》 20100831 曹丙霞，乔晓林 低电离层舒曼谐振观测 第1-5部分 1 第32卷, 第8期 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301632A (en) * | 2015-11-30 | 2016-02-03 | 江苏省地震局 | Earthquake precursor Schumann resonance vertical electric field receiving device |
| CN108594315A (en) * | 2018-04-20 | 2018-09-28 | 江苏省地震局 | Electromagnetism of Earthquake disturbance observation system and observation procedure based on induction type magnetic sensor |
| CN109471158A (en) * | 2019-01-22 | 2019-03-15 | 张银海 | A method of it is predicted an earthquake using the variation of monitoring VLF electromagnetic radiation intensity |
| CN113406609A (en) * | 2021-06-04 | 2021-09-17 | 哈尔滨工业大学 | Method for detecting ionosphere burst abnormal structure by sky-wave radar |
| CN113406609B (en) * | 2021-06-04 | 2022-11-29 | 哈尔滨工业大学 | Method for detecting ionosphere burst abnormal structure by sky-wave radar |
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Application publication date: 20110406 |