CN103278842A - Earthquake predicting and pre-warning system based on ground source ultrasonic wave monitoring and analysis - Google Patents
Earthquake predicting and pre-warning system based on ground source ultrasonic wave monitoring and analysis Download PDFInfo
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Abstract
The invention relates to an earthquake predicting and pre-warning system based on ground source ultrasonic wave monitoring and analysis. Earthquake is one of the most serious disasters facing human, which is the most difficult to predict and high in burstiness and is probable to cause the most serious human and animal casualties and highest property loss. Historically, man can only monitor other than predict the earthquake. Forecasting and predicting the earthquake is a major problem facing the world and has not been broken through. The earthquake predicting and pre-warning system based on ground source ultrasonic wave monitoring and analysis comprises a signal acquiring system, a signal processing system and a predicting and pre-warning system, which are sequentially connected. Relatively enough reaction time for predicting and pre-warning the earthquake is provided, ultrasonic waves are converted into the audible sound waves for man in real time, and then a direct way for sensing ground source ultrasonic waves by man is established. The system is high in data relevance and reliability. The acceptability of a prediction conclusion is high.
Description
One, technical field:
The present invention relates to a kind of earthquake prediction early warning system based on source, ground monitoring ultrasonic and analysis.
Two, background technology:
Earthquake is in the disaster that faces of the mankind, be difficult to most predict, sudden strong, may cause one of disaster that people and animals' injures and deaths are the heaviest and property loss is maximum.Since the own history, the mankind can only monitor unpredictable to earthquake, and predicting and predicting an earthquake is the great difficult problem that the whole world faces, breakthrough not yet in effect still so far.
China is since Xingtai earthquake in 1966, dropped into great amount of manpower and material resources and financial resources in the earthquake prediction field in the hope of haveing breakthrough, particularly carried out several generations' hardships exploration at numerous areas such as topography, barodynamics, deformation, underground water table, ground water chemistry, geomagnetism, satellite remote sensing technology, underground radon, earthquake meteorology, but produce little effect up to now.In recent years the active source detection of Chu Xianing, technology such as GPS, INSAR also be take totally ineffective measures, the far water difficulty rescues near thirsty.The spend huge sums seismological observation net built of country also mainly is that physical wave when earthquake is taken place is observed and record, forecasts far from.Even external advanced country such as Japan also can only strive for the pre-warning time in tens seconds in earthquake temporarily, this has represented the highest level of global earthquakes early warning substantially.
In a word, by relevant domain expert's consistent view, from world wide, earthquake prediction still is in the exploratory stage, the rule of earthquake preparation development on top of not as yet, the science index is not as foundation effectively and reliably, and therefore, present forecast mainly is according to the observational data of accumulation for many years and shake example, carry out empirical forecast, rate of false alarm, rate of failing to report can be in any more, have significant limitation inevitably, in fact do not have the possibility of forecast yet.For this reason, " People's Republic of China's protection against and mitigation of earthquake disasters method " the 16 regulation: country carries out unified system of issue to earthquake prediction.
Ultrasound wave is a kind of high-frequency sound wave of the human auditory's of exceeding scope; But the frequency of sound wave scope of people's ear sense of hearing is between 20Hz～20KHz.The sound wave that is lower than this scope is called infrasonic wave, surpasses the sound wave of this scope ultrasound wave.When the frequency of sound wave exceeded this scope, people's ear had not just been heard.But some animal can be heard and be used.Utilize ultrasound wave to seek food and detecting obstacles thing as animal capables such as whale, bat, dolphins.
Ultrasound wave is a kind of mechanical wave, and ultrasonic frequency range is in 20KHz～20BHz(2 * 10
4Hz～2 * 10
13Hz) between.Velocity of sound when ultrasound wave is propagated in different media is also different, and velocity of sound maximum reaches between 2000～8000m/s in the solid.Under same intensity, the frequency of sound wave is more high, and the energy that has is just more big.Because ultrasonic frequency is very high, so ultrasound wave is compared with general sound wave, its energy is much bigger.
Ultrasound wave can be produced by harder crystal material vibration.Because the frequency of ultrasonic height, wavelength is short, so the near linear propagation, can form transmitted beam, and energy is concentrated easily, so it can form very big intensity.In application, the place that some can't utilize light observation can utilize ultrasound wave to survey sometimes.
Can launch rectilinear propagation, high directivity by bunchy owing to ultrasonic.In communication process, when running into the different formed interface of material of two kinds of specific acoustic impedances, just produce reflection and the refraction effect of sound wave.The geometrical optics rule is followed in hyperacoustic reflection and refraction.In addition, if when supersonic beam projects on male and fomale(M﹠F) and the irregular interface respectively, also can as light, focus on, defocus and scattering etc.Density and elasticity as different objects are all different, and the situation of ultrasonic reflections or absorption is also inequality, so the slight crack that utilizes hyperacoustic echo to survey metal inside has become a new industry.This reflection sounding technology also is used to check the tissue of inside of human body or the fetus in mother's body etc. in medical science.
Ultrasound wave can be can not evenly mixing by mixed uniformly liquid originally, and medically this method commonly used is made the absorbent medicine of human body.Ultrasound wave can also be used to cleaning the precision component that those are complex-shaped, porous is pickled with grains or in wine more.Along with science and technology development, hyperacoustic application will be more extensive.
The present invention utilizes earthquake crustal plate mutual extrusion in fermenting process to produce powerful stress, these stress distribution can produce powerful ultrasound wave when acting on some special material or structure as lithosphere, rock pieces such as quartz, grouan, jade, crystals on whole seismic zone.This ultrasound wave is different from our the daily ultrasound wave that contacts, our daily ultrasound wave that contacts is except the ultrasound wave that animal sends, all being artificially to convert electric energy to acoustic energy by electronic transducer to obtain, is that artificial active produces, and also is initiatively ultrasound wave.And this ultrasound wave that is produced by subsurface rock layer, rock piece does not have power supply to provide, and is passive generation, and is underground because of deriving from, still it be called the source ultrasound wave, also be passive ultrasound wave.Its characteristics are as follows: (1) wave beam is thick.Because it is generally bulky to produce hyperacoustic sillar, it is long-pending bigger that it produces hyperacoustic beam cross section, so its wave beam is also bigger; (2) frequency height even extra-high-speed.Because powerful stress and the high-energy of earth's crust extruding, the ultrasonic frequency that produces is launched to discharge it with high frequency and even ultra-high frequency and is forced to energy, its frequency becomes positive correlation with stress, and along with the progressively increasing of stress raises its frequency accordingly to embody its energy grade; (3) high directivity.Ultrasound wave is a kind of sound wave of high directivity, strengthens with raise its directivity of frequency.For receiving, ground infers that its direction provides possibility.Certainly because ultrasound wave also has the possibility of refraction and reflection, in actual monitoring, should be distinguished in order to avoid Sounnd source direction is made false judgment; (4) continuation.Because earth's crust extruding is a continuous process, it is generally long that the time is fermented in earthquake, particularly big or especially big earthquake, that the time of fermenting has even reach the several years, so the ultrasound wave duration that produces also may be longer, this just provides plenty of time and space for the disaster reduction and prevention measure of effective monitoring and forecasting and warning and even correspondence; (5) decay property.The ground hyperacoustic decay in source mainly is that the propagation attenuation in stratum media causes.Similar with the sound wave propagation law, hyperacoustic attenuation coefficient and speed cube are inversely proportional to, with square being directly proportional of frequency.
Because source, ground ultrasound wave has decay in the medium communication process, add the scrambling of its beam direction, it is very low to propagate into the ultrasound wave probability that is hunted down on the ground or receives, and detects net effectively to catch and to monitor so need make up a bigger comprehensive solid of coverage rate along seismic zone.But up to now, no matter this field still is the technical blank that still belongs to theoretically.
Three, summary of the invention:
The present invention provides a kind of earthquake prediction early warning system based on source, ground monitoring ultrasonic and analysis in order to solve the weak point in the above-mentioned background technology.
For achieving the above object, the technical solution used in the present invention is: a kind of earthquake prediction early warning system based on source, ground monitoring ultrasonic and analysis, it is characterized in that: comprise signal acquiring system, signal processing system and forecasting and warning system, described signal acquiring system, signal processing system and forecasting and warning system are connected successively.
Described signal acquiring system comprises signal capture unit and regional signal acquisition server; The structure of described signal capture unit is that nine groups of different directions inductive material sheet groups combine, wherein one group of inductive material sheet group is horizontally disposed with, its center is provided with the hollow core cable axle, other 8 groups of inductive material sheet group five equilibriums around be arranged at horizontally disposed inductive material sheet group around, and with the angle of horizontally disposed inductive material sheet group be 135 ° of angles, described every group of inductive material sheet group is made up of independent induction chip and transducer array, it is electric signal with the ultrasonic vibration signal transition that described each induction chip connects an electromagnetic transducer, described transducer converts ultrasonic signal to electric signal respectively and is aggregated into a branch of cable and is sent to the regional signal acquisition server by the hollow core cable axle, described being horizontally disposed with is provided with miniature omnidirectional motor and can drives whole unit omnidirectional and rotate between inductive material sheet group switching centre position and the hollow core cable axle, the hollow core cable axle also transmits transducer and the required power supply of micromachine is supplied with.
Described signal processing system comprises data analysis center module, central information processing system and database, and described central information processing system is connected with database with the data analysis center module respectively.
Described forecasting and warning system comprises forecast conclusion decision-making issue center and receiving terminal.
Described receiving terminal is mobile phone, TV, satellite, alarm or broadcasting.
The material of described inductive material sheet group is crystal or hard material, and induction chip is 20KHz～20BHz(2 * 10 to hyperacoustic response frequency scope of different frequency in the inductive material sheet group
4Hz～2 * 10
13Hz).
Ultrasonic signal and ripple are handled the method that ultrasound wave is converted to audible sound, namely utilize computing machine that source ultrasonic signal is primitively carried out in real time and ripple is handled, with source, the ground ultrasonic frequency of correspondence with 1000 or the multiplying power of other quantity be that unit carries out and the mode number conversion, this multiplying power is called and the ripple rate, computing machine with source, arbitrary period ground frequency of ultrasonic divided by and the ripple rate, with the weighted mean wave amplitude of this time period as new wave amplitude, just can obtain the corresponding acoustic signals in visible sound wave section and be exported (warning), if wave amplitude is excessive or too small, decayed or gained by equipment, source, ground ultrasound wave in the scope of 20KHz～20MHz is through 1000 and ripple rate and ripple like this, can be converted to people's ear audible sound of 20Hz～20KHz, source, the ultrahigh frequency ground ultrasound wave that surpasses 20MHz then can obtain the acoustic signals that people's ear can be heard equally with secondary even three grades and ripple processing, and this partial function is realized in the central information processing system.And the voice signal behind the ripple also can be used as the preceding early warning signal part of imminent earthquake.
The high frequency non-transformer passive ultrasound wave of monitoring target for producing in ragstone layer, rock piece because of earth's crust squeezing action, that is source, ground ultrasound wave.
Compared with prior art, the advantage and the effect that have of the present invention is as follows:
1, the present invention provides the comparatively abundant reaction time for the earthquake prediction early warning;
2, the present invention has realized ultrasound wave is changed into human audible sound in real time, thereby has set up the mankind's direct consciousness approach of source ultrasound wave over the ground;
3, data dependence of the present invention is strong, reliability is high, and the prediction conclusion is acceptable strong.
Four, description of drawings:
Fig. 1 is structured flowchart of the present invention;
Fig. 2 is the structural representation of signal capture of the present invention unit;
Fig. 3 is the upward view of signal capture of the present invention unit;
The side view of Fig. 4 signal capture of the present invention unit.
Reference numeral: 1-signal acquiring system, 2-signal processing system, 3-forecasting and warning system, 4-data analysis center module, 5-central information processing system, 6-database, 7-forecast conclusion decision-making issue center, 8-receiving terminal, 9-signal capture unit, 10-regional signal acquisition server.
Five, embodiment:
The present invention is described in detail below in conjunction with the drawings and specific embodiments:
Referring to Fig. 1: a kind of earthquake prediction early warning system based on source, ground monitoring ultrasonic and analysis, it is characterized in that: comprise signal acquiring system 1, signal processing system 2 and forecasting and warning system 3, described signal acquiring system 1, signal processing system 2 and forecasting and warning system 3 are connected successively.
Described signal acquiring system 1 comprises a plurality of signal captures unit 9 and regional signal acquisition server 10;
Described signal processing system 2 comprises data analysis center module 4, central information processing system 5 and database 6, and described central information processing system 5 is connected with database 6 with data analysis center module 4 respectively.
The first, signal acquiring system
Signal acquiring system comprises signal capture one-element group and regional signal acquisition server two parts.The signal capture unit is a kind of pre-buried induction of signal part, combined by the quartzy chunk of nine groups of different directions or other hard rigid material chunks (hereinafter referred to as inductive material sheet group), the impurity content of each induction chip, machining shape and thickness are different to have nothing in common with each other its ultrasonic response frequency and impedance;
Every group of inductive material sheet group is by one group 3 * 3 or 4 * 4 arrays or other combinations, respectively different supersonic ranges there are the independent sensing chip tiling of big resonance response and minimum impedance or the matrix that is formed by stacking, to cover the bandwidth from 20KHz～20BHz, their normal direction is consistent.Wherein eight groups of inductive material sheet group front face normal will directions and surface water plane form-45 ° of angles of depression, form 0 ° of (N respectively with the positive north, ground (being made as 0 °), positive north), 45 ° of (NE, northeast), 90 ° of (E, due east), 135 ° (SE, southeast), 180 ° (S, due south), 225 ° (SW, southwest), 270 ° of (W, positive western) and 315 ° of (NW, northwest) angles.The 9th group of inductive material sheet group normal overlaps, is directed downwards with the gravity perpendicular line.The 9th group is horizontally disposed with and is connected a miniature omnidirectional motor between inductive material sheet group switching centre position and the hollow core cable axle and can drives whole unit omnidirectional and rotate, and accurately adjusts direction with over against the supersonic source direction to be captured the back at source, ground ultrasound wave by the sensing chip of other sheet group.Compare with other inductive material sheet group this moment, and its signal intensity is the strongest.With this hyperacoustic accurate direction in source definitely.As shown in Figure 2.The built-in fitting of pre-buried some just can constitute the monitoring net that certain coverage rate is arranged in a monitored area.As Fig. 2～Fig. 4.Each grid represents an independent induction chip, mates the ultrasound wave of different frequency range respectively with the different performance material of different-thickness to obtain minimum impedance, peak response and peak value of response.(be not limited to 3 * 3 or 4 * 4 combination, as required can 2 * 6,5 * 8 wait other combinations all can), each induction chip connects an electromagnetic transducer vibration signal is transformed into electric signal.The electric signal that all transducers convert ultrasonic signal to is aggregated into a branch of cable and is sent to ground region signals collecting server by hollow core cable axle (in Fig. 2～4).The hollow core cable axle also transmits transducer and the required power supply of miniature omnidirectional motor is supplied with.The regional signal acquisition server is being done simple process and is being filtered namely to central information processing system combined data to signal.
Signal capture of the present invention unit (group) is not limited to built-in fitting, also can be used in the portable monitoring mode, as vehicle-mounted, portable monitor etc.
In addition, monitoring system should adopt fixing pre-buried and vehicle-mounted mobile monitoring station to combine to carry out, and is not enough with additional pre-buried coverage rate, malfunctioning or other abnormal conditions of built-in fitting.Particularly in case discovery has improper spontaneous phenomenon to take place, as the animal anomaly performance, the face of land water surface hazes unusually, seethes with excitement, and fountain etc. all should in time be rushed towards source, on-site supervision ground ultrasonic signal, in order to avoid miss valuable early warning plane meeting.
The second, signal processing system
1, signal processing system is responsible for compiling and is collected source, the ground ultrasonic signal that gets by each regional signal acquisition server or mobile monitoring point and stored, and forms the original signal database, also can gather, filters and analyze; Or for setting up mathematical model, forecasting and warning before scientific research and the shake;
After signals collecting arrives, at first need establish its direction and distance, as previously mentioned, the supersonic source direction can directly be determined by adjustment equipment, as for distance, will pass through the signal of at least two above monitoring points, and confirm two signal sources from same stress area, this can be studied and judged by the consistance that compares its STRESS VARIATION.In case consistance is established, utilize the simple geometric principle just can determine supersonic source particular location and the distance.Even can under more multidata is supported, can also determine compressive region roughly, for accurate prediction lays the first stone.These work are finished by data analysis center;
2, after sense and distance are determined, also will determine its intensity, except direction, the signal sectional area also needs to determine, just need and confirm its edge with portable signal capture and collecting unit searching.When source, general a branch of ground ultrasound wave arrives ground, can project a projection in zone on the ground and come out, represent the size of emissive source.In conjunction with its frequency size and distance, can calculate this hyperacoustic energy rank in source, bundle ground roughly and come out like this.But the size of attention emissive source and frequency also may be accumulated in the process at seismic energy and change, so the monitoring that continues is necessary;
3, the database of signal processing system, at least should include but are not limited to following data: each induction of signal unit three-dimensional coordinate (longitude, latitude, the height above sea level degree of depth), frequency, wave amplitude, signal source direction (with the ground level angle, with positive northern angle), signal gathering unit chip number or multidimensional coordinate value, with source signal North and South direction maximum distance (comprising monitoring means numbering and coordinate diagram that these data are provided), with source signal east-west direction maximum distance (comprising monitoring means numbering and coordinate diagram that these data are provided), temperature, humidity etc.Image data should select the suitable time interval to give sample record as interim or permanent raw data according to the storage volume size.Should be according to wave amplitude and frequency size or their combination setting filtercondition during automatic data collection, and after when record data, should gathering filtration to each regional signal acquisition server simultaneously, caution is provided and transmits related data in real time to the central information processing system again, the central information processing system is when obtaining related data, be X-axis with time, be Y-axis with the various types of signal, can generate various indexs and monitor trend graph in real time and be presented at terminal display screen for monitoring personnel monitoring;
4, the present invention has designed a kind of signal and ripple treatment mechanism or method in signal processing system, namely utilize computing machine that source ultrasonic signal is primitively carried out in real time and ripple is handled, with source, the ground ultrasonic frequency of correspondence with 1000 or the multiplying power of other quantity be that unit carries out and the mode number conversion, this multiplying power is called and the ripple rate.Computing machine with source, arbitrary period ground frequency of ultrasonic divided by and the ripple rate, as new wave amplitude, the acoustic signals in visible sound wave section that just can obtain correspondence is exported (warning) with the weighted mean wave amplitude of this time period.Excessive or too small as wave amplitude, can be decayed or be gained by equipment.Can add that also light signal is to distinguish different ultrasonic grades on the voice signal basis.Represent source, ground ultrasonic signal in the different frequency range scope as the light with different colours, the monitoring personnel can obtain reminding and being monitored very intuitively.These signals can be mapped with each monitoring point or equipment.Source, ground ultrasound wave in the scope of 20KHz～20MHz can be converted to people's ear audible sound of 20Hz～20KHz through 1000 and ripple rate and ripple like this.Source, the ultrahigh frequency ground ultrasound wave that surpasses 20MHz then can obtain the acoustic signals that people's ear can be heard equally with secondary even three grades and ripple processing.And the voice signal behind the ripple also can be used as the preceding early warning signal part of imminent earthquake;
5, the signal that the zone that has sometimes may collect can be a lot, but scope and energy are big inadequately, are not enough to cause a felt earthquake, are rejected so certain filtercondition need be set.
Three, forecasting and warning system
Described forecasting and warning system 3 comprises forecast conclusion decision-making issue center 7 and receiving terminal 8;
Convert the audible signal basis at ultrasound wave and add that light signal is to distinguish different ultrasonic grades.Represent source, ground ultrasonic signal in the different frequency range scope with the light of different colours, the monitoring personnel can obtain reminding and being monitored very intuitively.These signals can be mapped with each monitoring point or equipment.
The earthquake energy accumulation has the process of a quantitative change to qualitative change, and source, ground ultrasound wave can accurately reflect its process just, is best observation index.Local source ultrasound wave by system acquisition after, have following rule to follow, and provide possible for effectively forecast and imminent earthquake early warning:
1, the source ultrasound wave is passed in time, its intensity can strengthen gradually, frequency also can correspondingly improve; Particularly magnitude of earthquake is more big, and its intensity and frequency are just more big;
2, along with the closing on of earthquake, earth's crust pressure spot is more and more, and the signal that monitors also can get more and more; This just provides conclusive evidence and foundation for earthquake prediction;
3, source, preceding ground of imminent earthquake ultrasound wave has the process of a sudden change, turns around down suddenly on peak value exactly, even disappears, and the definite signal that earthquake that Here it is is started must be reacted, and this also is the material time point of early warning;
When 4, earthquake is started, can send infrasonic wave simultaneously, so the monitoring infrasonic wave also is one of key index of impending earthquake forecast.Because ultrasound wave and infrasonic transmission speed are slightly faster than the earthquake physical wave, this just tries to gain time precious to one for sending early warning signal;
5, success or not of the present invention depends on that the monitoring coverage rate has or not enough scopes and monitored density whether more than enough, monitoring point density is more many, the probability of catching is just more big, in case add and find certain regional monitored powerful source, ground ultrasound wave of energy that has, can strengthen its monitoring density and intensity, one the income gangster is shallow surely temporarily.And from probability, for macroseism, the great shallow earthquake of destructive power, signal can be more many more strong, also easy being captured to more, and the advantage of native system just can fully obtain performance;
6, on the actual observation basis, set up database and corresponding mathematics model, it is fully feasible setting up relevant earthquake forecasting and warning mechanism accordingly;
So, after the forecast conclusion is put into effect, should submit to relevant decision-making body according to law and determine issue opportunity, scope, channel and mode, and coordinate all quarters concerned resource according to prediction scheme implement corresponding measure with tackle various may situations or situation;
The imminent earthquake early warning is in case determine to send and will be issued with the fastest time by all channels and means, comprise approach such as SMS, TV station display by screens, radio station, public public address equipment, satellite-signal, warning horn, internet, in the hope of covering all relevant regional crowd as far as possible.
Claims (8)
1. earthquake prediction early warning system based on source, ground monitoring ultrasonic and analysis, it is characterized in that: comprise signal acquiring system (1), signal processing system (2) and forecasting and warning system (3), described signal acquiring system (1), signal processing system (2) and forecasting and warning system (3) are connected successively.
2. a kind of earthquake prediction early warning system based on source, ground monitoring ultrasonic and analysis according to claim 1, it is characterized in that: described signal acquiring system (1) comprises signal capture unit (9) and regional signal acquisition server (10); The structure of described signal capture unit is that nine groups of different directions inductive material sheet groups combine, wherein one group of inductive material sheet group is horizontally disposed with, its center is provided with the hollow core cable axle, other 8 groups of inductive material sheet group five equilibriums around be arranged at horizontally disposed inductive material sheet group around, and with the angle of horizontally disposed inductive material sheet group be 135 ° of angles, described every group of inductive material sheet group is made up of independent induction chip and transducer array, it is electric signal with the ultrasonic vibration signal transition that described each induction chip connects an electromagnetic transducer, described transducer converts ultrasonic signal to electric signal respectively and is aggregated into a branch of cable and is sent to the regional signal acquisition server by the hollow core cable axle, described being horizontally disposed with is provided with miniature omnidirectional motor and can drives whole unit omnidirectional and rotate between inductive material sheet group switching centre position and the hollow core cable axle, the hollow core cable axle also transmits transducer and the required power supply of micromachine is supplied with.
3. a kind of earthquake prediction early warning system based on source, ground monitoring ultrasonic and analysis according to claim 1 and 2, it is characterized in that: described signal processing system (2) comprises data analysis center module (4), central information processing system (5) and database (6), and described central information processing system (5) is connected with database (6) with data analysis center module (4) respectively.
4. a kind of earthquake prediction early warning system based on source, ground monitoring ultrasonic and analysis according to claim 3 is characterized in that: described forecasting and warning system (3) comprises forecast conclusion decision-making issue center (7) and receiving terminal (8).
5. a kind of earthquake prediction early warning system based on source, ground monitoring ultrasonic and analysis according to claim 4, it is characterized in that: described receiving terminal is mobile phone, TV, satellite, alarm or broadcasting.
6. a kind of earthquake prediction early warning system based on source, ground monitoring ultrasonic and analysis according to claim 5, it is characterized in that: the material of described inductive material sheet group is crystal or hard material, and induction chip is 20KHz～20BHz(2 * 10 to hyperacoustic response frequency scope of different frequency in the inductive material sheet group
4Hz～2 * 10
13Hz).
7. a kind of earthquake prediction early warning system based on source, ground monitoring ultrasonic and analysis according to claim 6, it is characterized in that: ultrasonic signal and ripple are handled the method that ultrasound wave is converted to audible sound, namely utilize computing machine that source ultrasonic signal is primitively carried out in real time and ripple is handled, with source, the ground ultrasonic frequency of correspondence with 1000 or the multiplying power of other quantity be that unit carries out and the mode number conversion, this multiplying power is called and the ripple rate, computing machine with source, arbitrary period ground frequency of ultrasonic divided by and the ripple rate, with the weighted mean wave amplitude of this time period as new wave amplitude, just can obtain the corresponding acoustic signals in visible sound wave section and be exported (warning), if wave amplitude is excessive or too small, decayed or gained by equipment, source, ground ultrasound wave in the scope of 20KHz～20MHz is through 1000 and ripple rate and ripple like this, can be converted to people's ear audible sound of 20Hz～20KHz, source, the ultrahigh frequency ground ultrasound wave that surpasses 20MHz then can obtain the acoustic signals that people's ear can be heard equally with secondary even three grades and ripple processing, this partial function is realized in central information processing system (5), and the voice signal behind the ripple also can be used as the preceding early warning signal part of imminent earthquake.
8. a kind of earthquake prediction early warning system based on source, ground monitoring ultrasonic and analysis according to claim 7, it is characterized in that: the high frequency non-transformer passive ultrasound wave of monitoring target for producing in ragstone layer, rock piece because of earth's crust squeezing action, that is source, ground ultrasound wave.
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| PCT/CN2014/071126 WO2014187165A1 (en) | 2013-05-23 | 2014-01-22 | Earthquake prediction and alert system based on underground ultrasound monitoring and analysis |
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| CN103278842B (en) | 2015-04-08 |
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