CN101609144A - Three-dimensional positioning system of lightning radiation source - Google Patents
Three-dimensional positioning system of lightning radiation source Download PDFInfo
- Publication number
- CN101609144A CN101609144A CNA2009100901153A CN200910090115A CN101609144A CN 101609144 A CN101609144 A CN 101609144A CN A2009100901153 A CNA2009100901153 A CN A2009100901153A CN 200910090115 A CN200910090115 A CN 200910090115A CN 101609144 A CN101609144 A CN 101609144A
- Authority
- CN
- China
- Prior art keywords
- module
- lightning
- antenna
- broadband
- signal acquisition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005855 radiation Effects 0.000 title claims abstract description 79
- 230000005684 electric field Effects 0.000 claims abstract description 15
- 230000001427 coherent effect Effects 0.000 claims abstract description 9
- 230000004044 response Effects 0.000 claims description 11
- 239000013078 crystal Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000005305 interferometry Methods 0.000 claims 6
- 230000008859 change Effects 0.000 abstract description 12
- 230000001360 synchronised effect Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 34
- 230000004807 localization Effects 0.000 description 26
- 230000008569 process Effects 0.000 description 18
- 238000004422 calculation algorithm Methods 0.000 description 17
- 230000005670 electromagnetic radiation Effects 0.000 description 10
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 238000005070 sampling Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000002123 temporal effect Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000006854 communication Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 101000746134 Homo sapiens DNA endonuclease RBBP8 Proteins 0.000 description 1
- 101000969031 Homo sapiens Nuclear protein 1 Proteins 0.000 description 1
- 102100021133 Nuclear protein 1 Human genes 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Landscapes
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
本发明涉及一种闪电辐射源三维定位系统，该系统将宽带相干信号采集模块、快、慢天线信号采集模块、时钟模块和控制计算机模块构成的闪电辐射源三维定位系统分别安装在至少两个站点上；对于每个闪电辐射源，宽带相干信号采集模块将同时提供一组方位角、仰角信号，快、慢天线采集模块也将同步记录电场变化信号，时钟模块将同步给宽带相干信号采集模块和计算机提供精确的时间基准信号，上述信号也将同步传送给控制计算机模块；由各站点计算机内的软件控制程序控制各站点中的相应模块协调工作；各站点通过网络进行数据传输；由计算机中的三维定位处理软件，计算出各站点得到闪电辐射源方位角和仰角数据，交汇后得到辐射源的空间位置。
The invention relates to a three-dimensional positioning system for lightning radiation sources. The three-dimensional positioning system for lightning radiation sources composed of a broadband coherent signal acquisition module, fast and slow antenna signal acquisition modules, a clock module and a control computer module is respectively installed in at least two sites Above; for each lightning radiation source, the broadband coherent signal acquisition module will provide a set of azimuth and elevation angle signals at the same time, the fast and slow antenna acquisition modules will also record the electric field change signals synchronously, and the clock module will be synchronized to the broadband coherent signal acquisition module and The computer provides precise time reference signals, and the above signals will also be synchronously transmitted to the control computer module; the software control program in the computer of each station controls the corresponding modules in each station to coordinate; each station transmits data through the network; The three-dimensional positioning processing software calculates the azimuth and elevation data of the lightning radiation source obtained by each station, and obtains the spatial position of the radiation source after the intersection.
Description
Technical field
The present invention relates to be used for the equipment of meteorologic analysis, be specifically related to a kind of with the system of interferometric method to the lightning radiation source three-dimensional localization.
Background technology
The breakdown process of lightning can produce a series of wide band electromagnetic radiation, if think a radiation source in the corresponding lightning channel of each pulses of radiation, so by just can obtain the evolution of lightning channel to the continuous location of pulses of radiation.Utilize to receive VHF band (VHF) electromagnetic radiation that the lightning breakdown process produces, the location of carrying out lightning radiation source is an important means in current lightning detection, the THE PHYSICS OF LIGHTNING research.Divide from principle, VHF radiation source localization method mainly contains VHF radiation source time-of-arrival loaction and the VHF radiation source is interfered two kinds of localization methods.Time-of-arrival loaction is suitable for locating isolated short pulse electromagnetic radiation source, and interferes localization method also to have station-keeping ability preferably for continuous ELECTROMAGNETIC RADIATION SIGNATURE.
Interfering localization method is that the phase differential that utilizes lightning magnetic radiation signal to arrive between a plurality of antennas positions radiation source.The lightning interferometer of single website can provide position angle and the elevation angle of radiation source with respect to our station by by four three short baselines constituting of the antenna on same straight line not.In the technology in early days because the restriction of receiver bandwidth, narrow bandwidth is the earliest interfered in the localization method, ELECTROMAGNETIC RADIATION SIGNATURE only can receive the narrow band electromagnetic radiation signal of a certain particular frequency range by wave filter the time, along with the breakthrough on the high-speed high capacity digitized record equipment and technology, sample frequency and writing time length allowed the lightning magnetic radiation is carried out time domain observation in the broad frequency range, Shao X.M. in 1996 have proposed the model of broadband interferometer, Ushio[1997 afterwards first], Dong Wansheng [2000] has developed separately on this basis and has been used for two-dimensional localization lightning broadband interferometer system.
Lightning broadband interferometer system is with the broadband electromagnetic radiation signal of very high sample frequency Direct Sampling from antenna, after then these signals being made fast fourier transform, can obtain the narrow band signal of a series of different frequencies, so just be equivalent to have the narrow-band interference instrument system of a plurality of different length baselines.This will make that the selection of broadband interference system location frequency is more flexible, and it is simple compact that system architecture becomes, and can also obtain broader frequency spectrum information when the lightning electromagnetic radiation source is positioned, thereby become the important tool of lightning detection and research.
Yet, present broadband interferometer system mainly also rests in two dimension (position angle, the elevation angle) observation at single station, can not provide the three-dimensional spatial information of lightning, this makes people have very big inconvenience and uncertain to the understanding of lightning discharge feature, has limited the performance of broadband system advantage.The Manabu AKITA (2007 ICAE) of Japan had once reported the stereo observing system that they are integrated, and this system can gather interferometer antenna and slow electric field change aerial information simultaneously.But because its acquisition mode, both do not accomplish synchronous completely, make and can not determine for the physical process of lightning discharge; Simultaneously, because its location algorithm is more coarse, three-dimensional localization result is also undesirable.
Summary of the invention
The objective of the invention is to overcome defective of the prior art, provide a kind of with the system of interferometric method to the lightning radiation source three-dimensional localization, the three dimensions that it can disclose lightning radiation source with the temporal resolution of microsecond level develops feature, realized between a plurality of websites simultaneous observation to Lightning Process, the information of broadband interferometer record is synchronous fully with the information of fast, slow electric field change record in the website, and can provide lightning discharge high frequency (spectrum information of 30MHz～300MHz), thus provide means more intuitively for understanding the lightning discharge process.
For achieving the above object, technical scheme of the present invention is that employing is a kind of with the system of interferometric method to the lightning radiation source three-dimensional localization, comprising:
Broadband interference signal acquisition module, be used to measure the position angle and the elevation angle of lightning radiation source, the input end of this module is connected with the broadband interferometer antenna, and the data of the output of this module are transferred to the control computer module by gpib bus, carries out the data necessary pre-service;
Hurry up, slow aerial signal acquisition module, be used for surveying size and the polarity that lightning causes that ground electric field changes from the different time yardstick, the input end of this module is connected with fast, slow antenna respectively, the output terminal of this module is connected to data acquisition card, and capture card is installed in the pci bus slot of control computer module;
The gps clock module is used for providing the precise time benchmark to system, and the input end of this module is connected with gps antenna, and this module sends to broadband interference signal acquisition module and computer module respectively with time reference signal;
Computer module, be used to control the co-ordination of described broadband interference signal acquisition module, fast, slow aerial signal acquisition module, clock module, be provided with the image data Control Software in the described computing machine, in described computing machine, also be provided with and be used to calculate cross three localization process softwares of coordinate of at least two website image data;
Described broadband interference signal acquisition module, fast, slow aerial signal acquisition module, clock module are set at least two observation websites respectively, and the computing machine between the described website connects by network, realizes data transmission.
Wherein, in the interference signal acquisition module of described broadband, comprise 4 broadband interferometer antennas that are used to receive lightning high frequency radiation signal, described broadband interferometer antenna is connected with Hi-pass filter by concentric cable, and described Hi-pass filter is connected with four-way high-speed figure acquisition module.
Wherein, described broadband interferometer antenna is a plate aerial, and the response band of described broadband interferometer antenna is 0～300MHz.
Wherein, the cutoff frequency of described Hi-pass filter is 25MHz.
Wherein, the time constant of fast antenna is 2ms in described fast, slow aerial signal acquisition module, frequency response range 1kHz～5MHz, and the time constant of slow antenna is 6s, frequency response range 10Hz～2MHz, the dynamic range of output voltage is ± 10V.
Wherein, in described clock module, be provided with high stability crystal oscillator, in described clock module, also be provided with 1 the tunnel and trigger input port and mark output serial ports; Described clock module can provide the sine wave signal of 10MHz to acquisition module, and to the rough correcting delay signal of computing machine.
Advantage of the present invention and beneficial effect are: owing to the invention provides a kind of with the system of interferometric method to the lightning radiation source three-dimensional localization, by measuring the phase differential that the lightning radiation signal arrives different antennae, utilize computer software to calculate the position angle and the elevation angle that the lightning radiation arrives website, utilize different websites to obtain the position angle and the elevation angle between the lightning radiation source again, crossing calculates Rendezvous Point, the three-dimensional localization of realization lightning radiation source that just can be real.The detailed three-dimensional structure that cloud dodges and ground sudden strain of a muscle passage develops can be described by this system, can be used for regional lightning monitoring and early warning.Simultaneously, this system can obtain the broader frequency spectrum and fast, the slow electric field change information of lightning channel development synchronously, in conjunction with three-dimensional localization result of calculation, can provide abundant data for the discussion of the physical mechanism of lightning discharge process, the research of thunder and lightning physics.
Description of drawings
Fig. 1 is three location model figure of lightning radiation source among the present invention;
Fig. 2 is a three-dimensional positioning system of lightning radiation source structured flowchart of the present invention;
Fig. 3 is an oscillograph block sampling mode chart among the present invention;
Fig. 4 a is an oscillograph sampling software flow pattern of the present invention;
Fig. 4 b is a clock serial communication process flow diagram among the present invention;
Fig. 5 is two stations algorithm mathematics illustraton of model that crosses among the present invention;
Fig. 6 is radiant matching algorithm mathematical model figure among the present invention;
Fig. 7 is that two websites are laid illustraton of model among the present invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is further described.Following examples only are used for technical scheme of the present invention more clearly is described, and can not limit protection scope of the present invention with this.
To shown in Figure 7, the concrete technical scheme of implementing of the present invention is as accompanying drawing 1:
A kind of with the system of interferometric method to the lightning radiation source three-dimensional localization, this system comprises: high-frequency wideband coherent signal acquisition module 4, be used to measure the position angle and the elevation angle of lightning radiation source, this module receives the lightning electromagnetic radiation signal by high-frequency wideband interferometer antenna 4-1, the signal input part of this module is broadband interferometer antenna 4-1, this module is sent to computing machine 5 by output terminal after treatment with the lightning electromagnetic radiation signal that receives, and promptly the output terminal of this module is connected with signal receiving end.This system also comprises soon, slow aerial signal acquisition module 6, this module causes that by fast 6-1, the slow detectable lightning of 6-2 antenna ground electric field changes, the input signal of this module is respectively the detectable signal that fast 6-1, slow antenna 6-2 receive, after treatment through data acquisition card PCI, the signal receiving end that the detectable signal that fast 6-1, slow antenna 6-2 are received is transferred to computing machine 5 connects this module with the signal that receives.This system also comprises clock module 7, this clock module is used for providing the precise time benchmark to other module of system and computing machine, in this clock module 7, be provided with clock antenna 7-1, this clock module 7 can send to broadband interference signal acquisition module 4 and computing machine 5 respectively with the output terminal of time reference signal by this module.Computing machine 5, be used to control the co-ordination of described broadband interference signal acquisition module 4, fast, slow aerial signal acquisition module 6, clock module 7, in described computing machine 5, the software that various image data are controlled is installed, in described computing machine 5, also is equipped with and is used to calculate cross three localization process softwares of coordinate of lightning radiation data that at least two websites gather.Will be by described broadband interference signal acquisition module 4, hurry up, slow aerial signal acquisition module 5, the three-dimensional positioning system of lightning radiation source (broadband interferometer) that clock module 7 and control computer module 5 constitutes is installed in respectively at least two websites, and computing machine between the described website 5 connects by network.
In the present embodiment, in described broadband interference signal acquisition module 4, comprise 4 broadband interferometer antenna 4-1 that are used to receive lightning high frequency radiation signal, described broadband interferometer antenna 4-1 is connected with Hi-pass filter 4-2 by concentric cable, and described Hi-pass filter 4-2 is connected with four-way high-speed figure storage oscilloscope 4-3.
In the present embodiment, described broadband interferometer antenna 4-1 is a plate aerial, and the response band of described broadband interferometer antenna 4-1 is 0～300MHz.
In the present embodiment, the cutoff frequency of described Hi-pass filter 4-2 is 25MHz.
In the present embodiment, the time constant of fast antenna 6-1 is 2ms in described fast, slow aerial signal acquisition module 6, frequency response range 1kHz～5MHz, and the time constant of slow antenna 6-2 is 6s, frequency response range 10Hz～2MHz, the dynamic range of output voltage is ± 10V.
In the present embodiment, in described clock module 7, be provided with high stability crystal oscillator, in described clock module, also be provided with 1 the tunnel and trigger input port and mark output serial ports; Described clock module 7 can provide 10MHz the sinusoidal wave output signal reference frequency of stablizing to oscillograph 4-3, and to the rough correcting delay signal of computing machine 5.
In the present embodiment, described three-dimensional lightning radiation source is located framework and is based on position angle, the elevation information that existing broadband interferometer system can provide radiation source.The present invention is by to a plurality of distributed sites simultaneous observations, and for each radiation source, each website all can provide a prescription parallactic angle, the elevation angle, can obtain the three-dimensional space position of lightning radiation source by a plurality of websites at the joint in space, as Fig. 1.For realizing three-dimensional localization, need to be provided with 2 websites at least.
Yet lightning is the spontaneous phenomenon of a kind of moment, and the interval in lightning between the different frequency radiation source is very short, can reach several microseconds.Can point to same radiation source for the data that make a plurality of websites, need the trace routine high precision synchronous of each observation station; Simultaneously, in order from each group angle, to calculate the volume coordinate of radiation source, need design that rational location algorithm is arranged.
The integrated and data acquisition of hardware to single station system
List station system is the least unit of whole 3 D positioning system.Total system can be divided into 4 modules: broadband coherent signal acquisition module 4, and fast 6-1, slow 6-2 electric field change antenna (being called for short fast, slow antenna) acquisition module 6, clock module 7 and computing machine 5 control ends, the composition frame chart of system is as shown in Figure 2.
Broadband interference signal acquisition module 4 is mainly used in the record of realizing broadband lightning radiation signal, and its working method is similar with interferometer system in the past.4 broadband interferometer antenna 4-1, response band 0～300MHz.Antenna is continued to use plate aerial, is used to receive the high frequency radiation signal of lightning.Utilize 4 identical concentric cable to link to each other with a four-way high-speed figure storage oscilloscope 4-3 for 25MHz Hi-pass filter 4-2 by low-end cut-off frequency.Described oscillograph 4-3 adopts unique " limiting triggering mode (Qualify trigger mode) " to reduce false triggering: when after the external trigger in limiting time and internal trigger condition first section lightning radiation signal of oscillograph 4-3 opening entry when satisfying simultaneously, and the triggering of back segment is only by the internal trigger conditional decision.
Hurry up, slow aerial signal acquisition module 6 is used for synchronous recording electric field change curve.Fast 6-1, slow 6-2 antenna (electric field change instrument) can be surveyed size and the polarity that lightning causes that ground electric field changes from different time scales, time constant is respectively 2ms and 6s, frequency response range is respectively 1kHz～5MHz and 10Hz～2MHz, and out-put dynamic range is ± 10V.The data collecting card PCI 5-1 of speed aerial signal by being connected with computing machine gathers the detectable signal that fast, slow antenna receives.
For realizing the collaborative work of total system, need control program reasonable in design and trigger flow process.In Fig. 2, solid line is a data stream, and dotted line represents to trigger stream.Wherein, one road signal of fast 6-1 antenna inserts the auxiliary input end (AUX IN) of oscillograph 4-3 and imports as external trigger, the signal of broadband interferometer antenna 4-1 then is used as internal trigger, like this, when satisfying " limit and trigger " condition of oscillograph 4-3, trigger first section lightning radiation signal of opening entry as oscillograph 4-3, auxiliary output terminal (AUX OUT) the outputting standard trigger pip of while oscillograph 4-3, trigger PCI capture card 5-1 and clock module 7 on the computing machine simultaneously, PCI capture card 5-1 on the computing machine detects opening entry after the external trigger, the split-second precision that clock module 7 then produces this trigger pip stabs information 7-2, is gathered by computing machine 5 by serial ports.
This process is by computing machine 5 control operations.By data acquisition software control oscillograph 4-3, the capture card PCI5-1 of computing machine 5 control ends and the co-ordination of clock module 7, realize the synchronous acquisition and the demonstration in real time of single website internal interference instrument antenna 4-1, fast 6-1, slow 6-2 aerial signal, and acquired signal is deposited to hard disk.Main flow process such as Fig. 4 of image data Control Software in the computing machine 5.Wherein capture card is similar with oscillographic collecting flowchart, as Fig. 4 (a) expression, and the software control flow process of clock serial communication such as Fig. 4 (b).
By trigger pip shown in Figure 2 by after producing the trigger pip input on the clock module, clock module produces the time corresponding label information immediately and exports COM1 to, at this moment will produce a serial ports callback events, computing machine 5 writes the thread secure variant by reading serial ports with timestamp.After collecting device was adopted its internal storage with data, inquiry thread secure variant was with the temporal information that the obtains filename as these lightning data.Because the oscillograph 4-3 of U.S. power section is arranged under the working method of branch segment record, the triggering of each section all can produce a trigger pulse at auxiliary output terminal (AUX OUT) simultaneously, because in a Lightning Process, can produce a lot of trigger pulses, at this moment can control capture program and in a Lightning Process, only allow to adjust back the generation time label for the first time, and other pulse of soft shielding.
The location algorithm of three-dimensional lightning radiation source
In the present invention, after a plurality of websites collect synchronous observation signal, on each single station, utilize the derivation algorithm of former broadband interferometer, just can obtain position angle, the elevation angle time series of one group of radiation source separately.Because the geographical environment that each station is positioned at, all inequality with the distance of lightning radiation source, therefore, each website has nothing in common with each other to distance, the position angle of radiation source.This just needs Data Matching algorithm reasonable in design to seek the corresponding mutually radiant in each station, and then finds the solution the three-dimensional coordinate of radiation source by the three-dimensional localization algorithm.In practical operation, need both cooperatively interacting, to find best radiation source positions.At last, in order to guarantee alignment quality, need the rationality of positioning result be made an estimate.
Field test process below in conjunction with a summer describes working condition of the present invention in detail
1, the laying of website
According to the minimum requirement of three-dimensional localization, lay two website A, B.As shown in Figure 7, at a distance of 8.15km, sea level elevation is respectively 37m and 74m between the two measurement websites.Respectively lay 4 broadband interferometer antennas in each website, be positioned at foursquare four summits, by the 1-4 numbering, short base length is respectively 10m and 15m according to clockwise.The baseline of 1-4 antenna all points to positive north.In addition, each website respectively has the fast 6-1 of a cover, slow 6-2 electric field change instrument, is used for the electric field change of this website of simultaneous observation.
2, acquisition parameter setting
Oscillograph 4-3 adopts the 7100A of U.S. power section.The bandwidth of oscillograph 4-3 is 1GHz, resolution 8bit, and 50 Ω are selected in input impedance, the storage space of the built-in 8M of every passage, sampling rate is set to 1GS/s.For effectively utilizing storage space, the sampling pattern of " segmentation collection " that the employing oscillograph provides as shown in Figure 3, only just can trigger a segment record when signal satisfies given threshold value.Preset 4000 sections, every section 2K sampled point, every section keeps 20% pre-triggering, and intersegmental " dead time (dead time) " is in 1 microsecond.It is 300ms that adjacent two intersegmental largest intervals are set, the overtime radiation source end of record (EOR) that then makes this time lightning.
Capture card 5-1 adopts the external trigger pattern, and two passages are gathered fast 6-1, slow 6-2 electric field change antenna respectively, and sampling rate is preset as 1MS/s, and a sampling time 1s triggers 20% in advance.
Other Instruments connects with reference to accompanying drawing 2.Open each instrument power source, afterwards, click acquisition software " exploitation truck ", " driving oscillograph ", " opening COM " successively, obtain connection.Treat separately pilot lamp turn green after, click " beginning to gather ", system enters automatic acquisition phase.In addition, the acquisition parameter of the various parameter regulation collecting devices in the panel can be passed through to change, and manually record and self registering working method can be selected.After gathering end, click " stopping to gather " and stop gatherer process, point " withdraws from " and withdraws from acquisition system.
3, two station three-dimensional localization
Be example with this pair station system below, analyze crossing and matching algorithm of two station radiation sources.
1), two stations algorithm that crosses
Suppose to have calculated a prescription parallactic angle and the elevation angle respectively, need algorithm reasonable in design to find the solution the three-dimensional coordinate of radiation source, to reduce positioning error as much as possible with respect to our station by the data that two stations A, B gather.The present invention uses for reference the three-dimensional coordinate that two transit baseline wind observation algorithms (existing known technology) are found the solution radiation source, now algorithm principle is summarized as follows:
As shown in Figure 5, set up coordinate system, getting station A is true origin, and AB is projected as the y axle on surface level, and the position angle at two stations is 0 ° with the forward of y axle all, and clockwise direction increases, and the forward of x axle points to 90 °, and the z axle vertically points to zenith.AD, BC are respectively two rays along position angle, two stations, the elevation angle, and CD is the common vertical line of different surface beeline AD and BC.Then the radiation source maximum possible is positioned at certain the some P place on the CD, and the position of P point in line segment CD is relevant with the length of AD, BC, and length is more little, and corresponding reliability is high more, like this, according to Fig. 5, utilizes the space vector relation, just can obtain the three-dimensional coordinate that P is ordered.The P point is just more near this end, thereby satisfies
In addition, by the length of common vertical line CD, can reflect the error size after each three-dimensional localization, this coupling and fail-safe analysis for data is very meaningful.
2), radiant matching algorithm
Matching algorithm is mainly according to temporal information, the position that obtains according to the location after the coupling and the mistiming of match point are judged the correctness of coupling, in-plant should the generation earlier, if same point has a plurality of combination Satisfying Matching Conditions, choose the less combination of error, after the coupling, matched line can not intersect.
As shown in Figure 6, t is a time shaft, and each stain on it is represented the position of radiant on time shaft that each website obtains.To seek the corresponding point at A station and B station now.Suppose that it is 0 this point that the B station has matched sequence number, maximum time difference Δ t_max that allow according to two stations at first, 0～4 that establishes the A station all meets the requirements.At this moment, respectively these 5 combinations are obtained the estimation space position of radiation source with the described method of 3.1 joints, again by the range difference at radiation source to two station and the anti-correctness that pushes away coupling of relation of the mistiming that receives, if 0～3 all satisfies correctness condition, the coupling 0-0 that then chooses the error minimum is as optimum matching.
In addition, in matching process, according to the time order and function relation, matched line can not intersect.If obtained one group of point of crossing matched line, as shown in phantom in FIG., because the point 3 at A station is early than point 4, the point 2 at B station is early than point 3, if so think the point 3 and the B website 3 corresponding same radiation sources at A station, from the time order and function relation, it is a radiation source that the point 4 at the point 2 at A station and B station just can not mate.At this moment, need remove wherein one group according to both errors.
3), quality control
In order to make the radiant position that obtains reliable, also need further to do quality control.
Because system has the high accuracy clock subsystem, when each radiation source record, all can write down high-precision triggering constantly.As if the three-dimensional coordinate that has obtained the corresponding same radiation sources in two stations by above algorithm, then the range difference of two websites of this radiation source distance is also just definite, thereby the mistiming also just is easy to obtain.The mistiming of the radiant separately of the mistiming that obtains thus and two stations system clocks record relatively, if differ too big, then think this time locate unreasonable, thereby should reject.
In addition, according to the existing understanding of forefathers to lightning channel, the position of radiation source is generally zero in tens kms, if fragmentary radiation source exceeded this zone, think unreasonable being rejected equally.
Above algorithm has constituted the three-dimensional localization handling procedure, and this program can be finished the three-dimensional localization and the demonstration of lightning radiation source automatically.
The advantage of present embodiment and being, owing to the invention provides a kind of with the system of interferometric method to the lightning radiation source three-dimensional localization, simultaneous observation by a plurality of websites, the three-dimensional localization of realization lightning radiation source that can be real, the detailed three-dimensional structure that cloud dodges and ground sudden strain of a muscle passage develops can be described by this system, can be used for regional lightning monitoring and early warning.Simultaneously, this system can obtain the broader frequency spectrum and fast, the slow electric field change information of lightning channel development synchronously, in conjunction with the three-dimensional localization result, can provide abundant data for the discussion of the physical mechanism of lightning discharge process, the research of thunder and lightning physics.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100901153A CN101609144B (en) | 2009-07-29 | 2009-07-29 | Three-dimensional positioning system of lightning radiation source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100901153A CN101609144B (en) | 2009-07-29 | 2009-07-29 | Three-dimensional positioning system of lightning radiation source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101609144A true CN101609144A (en) | 2009-12-23 |
| CN101609144B CN101609144B (en) | 2011-12-21 |
Family
ID=41482969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100901153A Active CN101609144B (en) | 2009-07-29 | 2009-07-29 | Three-dimensional positioning system of lightning radiation source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101609144B (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435978A (en) * | 2011-11-23 | 2012-05-02 | 华中科技大学 | Direction finding device for phase interferometer and phase spectrum interferometer based on multiple baselines |
| CN102937671A (en) * | 2012-10-24 | 2013-02-20 | 中国人民解放军理工大学气象学院 | Integrated device for lightning and ground electric field monitoring |
| CN103235284A (en) * | 2013-03-29 | 2013-08-07 | 中国气象科学研究院 | Multi-station lightning VHF (very high frequency) radiation source three-dimensional positioning method and system |
| CN103630760A (en) * | 2012-08-28 | 2014-03-12 | 国家广播电影电视总局无线电台管理局 | Field intensity data process system and method |
| CN106405253A (en) * | 2016-08-24 | 2017-02-15 | 中国气象科学研究院 | Method and apparatus for positioning object lightning radiation source |
| CN107037272A (en) * | 2017-06-20 | 2017-08-11 | 云南电网有限责任公司昆明供电局 | Lightning Location Method based on thunder and lightning multivariate data peak-seeking Shicha algorithm |
| CN107525974A (en) * | 2017-09-06 | 2017-12-29 | 武汉旗云高科工程技术有限公司 | A kind of Lightning Warning method and speed antenna integral type electric field change measuring instrument |
| CN108845188A (en) * | 2018-07-11 | 2018-11-20 | 云南电网有限责任公司电力科学研究院 | A kind of mono-station location method and system of remote cloud-to-ground flash |
| CN110174557A (en) * | 2019-01-11 | 2019-08-27 | 南京信息工程大学 | A kind of thunder cloud positioning calibration method based on three-dimensional atmospheric electric field instrument observation visual angle |
| CN112651427A (en) * | 2020-12-03 | 2021-04-13 | 中国科学院西安光学精密机械研究所 | Image point fast and efficient matching method for wide-base-line optical intersection measurement |
| CN112965147A (en) * | 2021-02-09 | 2021-06-15 | 珠海复旦创新研究院 | System error simulation and optimization method of broadband interferometer lightning positioning system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1847876A (en) * | 2005-04-13 | 2006-10-18 | 中国科学院寒区旱区环境与工程研究所 | Ultrahigh frequency lightning radiation source detecting and locating system based on short base line time difference method |
-
2009
- 2009-07-29 CN CN2009100901153A patent/CN101609144B/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435978A (en) * | 2011-11-23 | 2012-05-02 | 华中科技大学 | Direction finding device for phase interferometer and phase spectrum interferometer based on multiple baselines |
| CN103630760A (en) * | 2012-08-28 | 2014-03-12 | 国家广播电影电视总局无线电台管理局 | Field intensity data process system and method |
| CN102937671A (en) * | 2012-10-24 | 2013-02-20 | 中国人民解放军理工大学气象学院 | Integrated device for lightning and ground electric field monitoring |
| CN103235284A (en) * | 2013-03-29 | 2013-08-07 | 中国气象科学研究院 | Multi-station lightning VHF (very high frequency) radiation source three-dimensional positioning method and system |
| CN106405253A (en) * | 2016-08-24 | 2017-02-15 | 中国气象科学研究院 | Method and apparatus for positioning object lightning radiation source |
| CN107037272A (en) * | 2017-06-20 | 2017-08-11 | 云南电网有限责任公司昆明供电局 | Lightning Location Method based on thunder and lightning multivariate data peak-seeking Shicha algorithm |
| CN107525974A (en) * | 2017-09-06 | 2017-12-29 | 武汉旗云高科工程技术有限公司 | A kind of Lightning Warning method and speed antenna integral type electric field change measuring instrument |
| CN108845188A (en) * | 2018-07-11 | 2018-11-20 | 云南电网有限责任公司电力科学研究院 | A kind of mono-station location method and system of remote cloud-to-ground flash |
| CN110174557A (en) * | 2019-01-11 | 2019-08-27 | 南京信息工程大学 | A kind of thunder cloud positioning calibration method based on three-dimensional atmospheric electric field instrument observation visual angle |
| CN110174557B (en) * | 2019-01-11 | 2021-12-21 | 南京信息工程大学 | Thunderstorm cloud positioning and calibrating method based on three-dimensional atmospheric electric field instrument observation visual angle |
| CN112651427A (en) * | 2020-12-03 | 2021-04-13 | 中国科学院西安光学精密机械研究所 | Image point fast and efficient matching method for wide-base-line optical intersection measurement |
| CN112651427B (en) * | 2020-12-03 | 2024-04-12 | 中国科学院西安光学精密机械研究所 | Image point rapid and efficient matching method for wide-baseline optical intersection measurement |
| CN112965147A (en) * | 2021-02-09 | 2021-06-15 | 珠海复旦创新研究院 | System error simulation and optimization method of broadband interferometer lightning positioning system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101609144B (en) | 2011-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101609144A (en) | Three-dimensional positioning system of lightning radiation source | |
| CN201548622U (en) | Three-dimensional Lightning Radiation Source Locating System with Broadband Interferometer | |
| CN111257700B (en) | Power distribution network single-phase earth fault positioning device and method based on edge calculation | |
| CN102565542B (en) | Capacitive equipment medium loss online monitoring method based on IEC61850-9-2 standard | |
| CN107748317B (en) | A kind of Precise Position System of buried cable high resistive fault | |
| CN105466453B (en) | A kind of navigation equipment on-line monitoring system and method | |
| CN112946424B (en) | Method and device for accurately positioning fault | |
| CN104991167B (en) | A kind of fault positioning system of power line and method based on overvoltage on-line monitoring | |
| CN102508031B (en) | Fourier series based measurement method of phase angle of partial discharge pulse | |
| CN110927510B (en) | A frequency domain method for double-ended traveling wave fault location of transmission lines | |
| CN202433482U (en) | Portable partial discharge acoustic-electric joint detection apparatus for GIS | |
| CN101609145A (en) | Full Lightning Locating System Combining VLF and VHF | |
| CN105807182B (en) | A double-ended traveling wave fault location method for transmission lines | |
| CN103389441A (en) | Fault detection and positioning system for power line | |
| Ma et al. | A Method of line fault location based on traveling wave theory | |
| CN103809156A (en) | Regional high-resolution lightening radiation source locating system | |
| CN101231323A (en) | Distributed high-precision transmission line travelling wave positioning system | |
| CN106405253A (en) | Method and apparatus for positioning object lightning radiation source | |
| CN105807183A (en) | Power transmission line fault positioning method based on non-contact sensor | |
| CN101609136A (en) | Measuring instrument for voltage transformer secondary voltage drop and method for measuring phase angle difference | |
| CN105445614B (en) | Double-end traveling wave fault positioning method and system based on wavelet analysis | |
| CN114325250A (en) | Partial discharge detection device and method integrating localization detection and map detection functions | |
| CN107894552A (en) | A kind of fault traveling wave detection method | |
| CN117192292A (en) | Lightning grounding electrode line fault distance measurement method and system | |
| CN103823157A (en) | GPS synchronous timing-based XLPE cable partial discharge positioning device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |