CN201555946U - Full-lightning positioning system of combination of extremely low frequency and extremely high frequency - Google Patents
Full-lightning positioning system of combination of extremely low frequency and extremely high frequency Download PDFInfo
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- CN201555946U CN201555946U CN2009201729140U CN200920172914U CN201555946U CN 201555946 U CN201555946 U CN 201555946U CN 2009201729140 U CN2009201729140 U CN 2009201729140U CN 200920172914 U CN200920172914 U CN 200920172914U CN 201555946 U CN201555946 U CN 201555946U
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Abstract
The utility model relates to a full-lightning positioning system of combination of extremely low frequency and extremely high frequency, which is characterized by comprising at least four lightning positioning and monitoring stations. An extremely low-frequency lightning radiation receiver, an extremely high-frequency lightning radiation receiver, a GPS receiver and an industrial personal computer are arranged inside each lightning positioning and monitoring station; and the stations provide a time reference by the GPS receiver, obtain time and wave form for reaching each station of lightning field change pulse and VHF radiation pulse, preprocess obtained wave form data by the industrial personal computer, and then transmit the obtained data to the industrial personal computer used for analyzing and processing the pulse wave form in real-time manner through internet to realize monitoring in real-time manner and positioning in three-dimensional manner for lightning discharge accidents. Under the matching of hardware and software, the system can be used for determining the number, types, characteristic parameters and statistical characteristic of the lightning discharge accidents happening within a designated area, and monitors and pre-warn thunder and lightning.
Description
Technical field
The utility model relates to meteorological observation equipment, is specifically related to very low frequency (VLF) and very high frequency(VHF) all-lightning positioning system.
Background technology
Lightning is one of serious main disaster, can cause forest and oil depot fire, cause power supply and communication information system fault or damage, and space flight and aviation, mine and hi-tech equipment that some are important and responsive etc. are had significant threat.After the eighties, the harm that lightning causes significantly increases, field particularly in close relations with new and high technology, as Aero-Space, national defence, communication, electric power, computing machine, electronics industry etc. because widespread use causes thunderstruck probability to increase greatly to the very responsive extensive and VLSI (very large scale integrated circuit) of lightning electromagnetic interference (EMI); According to conservative estimation, China surpasses several hundred million units because of the direct economic loss that damage to crops caused by thunder causes every year, and indirect economic loss that causes thus and influence are difficult to estimate, have brought great difficulty to its research, forecast and control rapidly because it causes disaster.
And lightning detection and positioning system can be carried out early warning to lightening activity, thereby reduce the deleterious effect that lightning causes.Because lightning positioning system can be monitored the development of " dodge " and differentiation of " cloud sudden strain of a muscle " space-time even discharge channel incessantly, so these systems also can be used for determining to take place in the appointed area quantity of lightning, and the statistical nature of discharge parameter, therefore developing new lightning detection technology is current very urgent task.
The utility model content
The purpose of this utility model is to overcome defective of the prior art, design the all-lightning positioning system that a kind of very low frequency (VLF) combines with very high frequency(VHF), this system is according to the real needs of radiation of lightening discharge characteristics and lightning detection, specialized designs radiation of lightening discharge signal processing and analysis register system.This system can be used for determining to take place in the appointed area quantity of lightning, and the statistical nature of discharge parameter, and can carry out early warning to lightening activity.
For achieving the above object, all-lightning positioning system of the present utility model is the technical scheme that adopts a kind of very low frequency (VLF) to combine with very high frequency(VHF), this system comprises at least five lightning location monitoring stations, is provided with very low frequency (VLF) lightning radiation receiver, very high frequency(VHF) lightning radiation receiver, GPS receiver, industrial computer and pci data capture card in the described lightning location monitoring station; Be provided with peak value of pulse acquisition channel, data segment acquisition channel, second synchronization module, sampling clock module and pci controller in the described pci data capture card; Described very low frequency (VLF) lightning radiation receiver links to each other with described data segment acquisition channel, gathers the signal that described very low frequency (VLF) lightning radiation receiver detects by described data segment acquisition channel; Described very high frequency(VHF) lightning radiation receiver links to each other with described peak value of pulse acquisition channel, gathers the signal that described very high frequency(VHF) lightning radiation receiver detects by described peak value of pulse acquisition channel; Described GPS receiver links to each other with described second synchronization module; Described GPS receiver links to each other with described sampling clock module by the gps clock module; Described GPS receiver inserts the serial ports of described industrial computer, input GPS Serial Port Information; Described pci data capture card inserts the PCI slot that is provided with on the described industrial computer, by the pci bus Data transmission.
Wherein, described very low frequency (VLF) lightning radiation receiver comprises receiving antenna, integrating amplifier, wave filter, driving output circuit, mould/number conversion circuit and the recording unit that connects successively, and described receiver is used to survey the transient electric field that receives the lightning generation to be changed.
Wherein, described very high frequency(VHF) lightning radiation receiver comprises receiving antenna, preselection filter, frequency converter, intermediate-frequency filter, logarithmic amplifier, driving output circuit, mould/number conversion circuit and the recording unit that connects successively, and described receiver is used to survey the VHF radiation signal that the small scale discharge process produces.
Wherein, be provided with described data acquisition module and data processing software in the described industrial computer, described data processing software is used for analyzing, handling the lightning waveform, and obtains the timestamp that the lightning radiation signal arrives.
Wherein, described GPS receiver, described very low frequency (VLF) lightning radiation receiver, described very high frequency(VHF) lightning radiation receiver are integrated in the described industrial computer, described GPS receiver is used for frequency reference to be proofreaied and correct, and exports frequency signal accurately, also provides the precise time benchmark to system simultaneously.
Wherein, the antenna in the described very high frequency(VHF) lightning radiation receiver is a discone antenna, and described discone antenna is the linearly polarized wideband omnidirectional antenna.
Wherein, described data acquisition parts are provided with 2 independently sample channel, and the maximum data sampling rate of described two channels is respectively 5MS/s and 50MS/s.
Wherein, be provided with trigger circuit and storer in the described industrial computer, described trigger circuit are used for after signal that acquisition component receives is greater than preset threshold, described trigger circuit are triggered and gather lightning waveform, lightning radiation intensity and signal time stamp, and, simultaneously described signal storage is arrived in the described storer by the internet transmission data.
Advantage of the present utility model and beneficial effect are: under the cooperation of above-mentioned hardware and software, this system can be used for determining to take place in the appointed area quantity of lightning (cloud dodges and ground dodges), lightning space-time develops feature, electric discharge type, and the statistical nature of discharge parameter, and can carry out early warning to lightening activity.
Description of drawings
Fig. 1 is the all-lightning positioning system block diagram that the utility model very low frequency (VLF) combines with very high frequency(VHF);
Very low frequency (VLF) lightning radiation receiver system chart in the all-lightning positioning system that Fig. 2 is the utility model very low frequency (VLF) with very high frequency(VHF) combines;
Very high frequency(VHF) lightning radiation receiver system chart in the all-lightning positioning system that Fig. 3 is the utility model very low frequency (VLF) with very high frequency(VHF) combines;
Gps clock modular structure block diagram in the all-lightning positioning system that Fig. 4 is the utility model very low frequency (VLF) with very high frequency(VHF) combines;
Tuning voltage control algolithm software flow pattern in the all-lightning positioning system that Fig. 5 is the utility model very low frequency (VLF) with very high frequency(VHF) combines; Err among Fig. 5: frequency error absolute value; Nzflag: error current polarity; Preig: last time error polarity; Zlag: continuous zero error number; Incre: controlled quentity controlled variable increment;
The structured flowchart of data collecting card in the all-lightning positioning system that Fig. 6 is the utility model very low frequency (VLF) with very high frequency(VHF) combines.
Embodiment
Below in conjunction with drawings and Examples, embodiment of the present utility model is further described.Following examples only are used for the technical solution of the utility model more clearly is described, and can not limit protection domain of the present utility model with this.
To shown in Figure 5, the concrete technical scheme of implementing of the utility model is as accompanying drawing 1:
The all-lightning positioning system that a kind of as shown in Figure 1 very low frequency (VLF) combines with very high frequency(VHF), this system comprises at least five lightning location monitoring stations, be provided with very low frequency (VLF) lightning radiation receiver in the described lightning location monitoring station, very high frequency(VHF) lightning radiation receiver, the GPS receiver, industrial computer, described website utilizes the GPS receiver that the absolute time benchmark is provided, obtain time and waveform that lightning VLF/LF pulses of radiation and VHF pulses of radiation arrive each website, utilize industrial computer that the acquisition Wave data is carried out pre-service, by the internet data in real time that is obtained is transferred to then and is used for analyzing, handle the industrial computer of described pulse, realize real-time monitoring and three-dimensional localization the lightning discharge incident.
In general, the signal that the very low frequency (VLF) system surveys often corresponding in the lightning discharge process than large scale electric current process, usually only can obtain an effective position, and the very high frequency(VHF) system surveys the more radiation signal of the breakdown process generation of small scale, it can detect processes such as initial breakdown that cloud dodges discharge process, guide's discharge, also can depict lightning channel.Therefore, the utility model is in conjunction with these two kinds of lightning positioning system characteristics, adopt the scheme of very low frequency (VLF) and very high frequency band detection system associating, development has been finished this cover and can have been dodged with surveying, also can survey the full lightning sounding equipment that cloud dodges (comprising that some occur in the special discharge incident in the cloud).
Lightning has bigger discreteness, can produce the pulses of radiation of enormous amount in the intensive period in the moment of lightning, if want complete monitoring thunder and lightning incident, the characteristic parameter of necessary each the lightning discharge incident of accurate recording of system and generation are constantly, promptly must design a very high system architecture of data throughput and realize the reliable record of intensive period of thunder and lightning whole incidents, and the result who does so singly is not that to obtain thunder and lightning details Wave data amount huge, make that also the time and the cost of post analysis are also very high, under most monitoring purpose and be unworthy.Therefore, the utility model is according to the real needs of radiation of lightening discharge characteristics and lightning detection, and specialized designs has been developed radiation of lightening discharge signal processing and analysis register system.
The scheme that this cover lightening detection system very low frequency (VLF) combines with the very high frequency(VHF) radiation.Mainly constitute by very low frequency (VLF) lightning radiation receiver, very high frequency(VHF) lightning radiation receiver, gps clock synchro system and radiation of lightening discharge signal data acquisition system.The transient electric field that the lightning that very low frequency (VLF) lightning radiation receiver is used to survey produces changes, and its principle is similar to fast electric field change instrument commonly used, and working frequency range is 200Hz～3MHz; Very high frequency(VHF) lightning radiation receiver is mainly used to survey the radiation signal that the small scale discharge process produces, disturb for avoiding local wireless communication signal, it is adjustable continuously that this receiver centre frequency is set to 30-300MHz, bandwidth 8MHz, the radiation of lightening discharge signal through processing such as preliminary election filtering, frequency conversion, intermediate frequency filtering, logarithm amplifications, is made it become the signal that adapts to data sampling and sends data acquisition system (DAS) to.Precision clock information obtains from the GPS receiver, and local oscillator is undertaken by the 1PPS reference signal of GPS synchronously.On the system board as required and voluntarily the digital integrated circuit of constitutive logic function (CPLD) handle the feature of mould/number (A/D) image data in two kinds of time windows in real time, and write down the precise time mark.Data acquisition unit is respectively with sampling rate digitizing electric field change and the VHF radiation signal of 5Msps and 50Msps, after this signal compares with predefined numerical value activation threshold value continuously, when signal intensity surpasses given threshold value, electric field change waveform after the digitizing by capture card (industrial computer I) bus transfer to the industrial computer internal memory, catch each electric field change pulse and without any the dead time, and extract real-time waveform character parameter, original waveform and waveform parameter are written into storage medium subsequently.To the very high frequency(VHF) signal, utilize on-site programmable gate array FPGA on the data collecting card (
FIeld
PRogrammable
GAte
ARray), the radiation field signal after the digitizing is carried out the window processing, tracer signal peak value, time, and other primary waves shape parameter, the braning format data output to a buffer (FIFO), and industrial computer extracts data from FIFO and writes storage medium then.
As shown in Figure 1, total system hardware is made up of very low frequency (VLF) lightning radiation receiver, very high frequency(VHF) lightning radiation receiver, GPS receiver, data collecting card and industrial computer.
As shown in Figure 2, comprise receiving antenna, integrating amplifier, wave filter, driving output circuit, mould/number conversion circuit and the recording unit that connects successively at the lightning of very low frequency (VLF) described in the utility model radiation receiver, described receiver is used to survey the transient electric field that receives the lightning generation to be changed.
As shown in Figure 3, described very high frequency(VHF) lightning radiation receiver comprises receiving antenna, preselection filter, frequency converter, intermediate-frequency filter, logarithmic amplifier, driving output circuit, mould/number conversion circuit and the recording unit that connects successively, and described receiver is used to survey the radiation signal that the small scale discharge process produces.Lightning at the radiation signal of very high frequency band mainly by producing than the small scale breakdown process, may detect the process such as initial breakdown, guide's discharge of lightning, the lightning of depicting that can be more detailed develops passage, and this to THE PHYSICS OF LIGHTNING mechanism, lightning development space-time differentiation The Characteristics and lightning Characteristics and thunder cloud Characteristics of Precipitation takes place and concerns to study that very high practical value is arranged.But in this frequency range, also have various wireless communication signal, and these signals because of in different regions or the different period different, these signals have a strong impact on very high frequency(VHF) lightning detection system operate as normal sometimes.Based on above-mentioned situation, the utility model has been developed tuner-type lightning very high frequency(VHF) signal receiver specially.By control computer RS232 interface, its centre frequency can be regulated arbitrarily in 30MHz～300MHz.This function makes the installation of lightning location detection system set up and is more prone to, flexible, and needn't understand near the electromagnetic environment of installing the website in advance.This receiver has local vibration source (FS0330) and receiver (RE0330) two parts to constitute, and logarithmic detector output and intermediate frequency output are arranged, and wherein the video output bandwidth is 8MHz, and the intermediate frequency output bandwidth is wideer to be 20MHz.
For cooperating the tuner-type ultra-high frequency receiver, adopt discone antenna, this is a kind of linearly polarized wideband omnidirectional antenna.
The gps clock modular design
The GPS receiver is selected the M12T high-precision GPS time service module of motorola inc for use.This module can be followed the tracks of 12 satellites simultaneously, exports the serial data of high-precision 1PPS pulse signal and NEMA-0183.The second that the 1PPS signal can be used for the calibration of sampling clock and capture card synchronously.Serial data comprises information such as the UTC moment, longitude, latitude, height above sea level and receiver state, for acquisition system provides the accurate moment and gathers environmental information.
The 1PPS pulse that the gps clock module is sent with the GPS receiver is reference, produces the 100M clock signal of high precision high stability degree, for the pci data capture card provides high-quality sampling clock source, to reduce time error, improves the bearing accuracy of thunder and lightning.
The GPS receiver module is formed and principle
The gps clock module adopts the scheme structure that a kind of modulus mixes, software is phase-locked, and its structure as shown in Figure 4.The output of 10M Voltage-Controlled Temperature Compensated Crystal Oscillator (VCTCXO) obtains the 100M clock through frequency multiplication, this clock is 10 as the mould of FPGA inside, the clock of 000 counter, FPGA latchs the value of counter at each 1PPS rising edge of a pulse, and interrupt to the application of M6759 single-chip microcomputer, industrial computer after reading count value with on once count value make comparisons and draw the error of this second output clock, in industrial computer, error is converted to the digital tuning voltage of Voltage-Controlled Temperature Compensated Crystal Oscillator according to the tuning voltage control algolithm, control VCTCXO forms closed-loop control after digital-to-analogue (D/A) conversion.
The benefit of this scheme is the 1PPS signal assurance of the long-term stability of output frequency by GPS, and short-term stability depends on the VCTCXO crystal oscillator.The temperature stability of the Voltage-Controlled Temperature Compensated Crystal Oscillator of choosing is ± 0.5ppm that annual aging characteristic is 1ppm.
Because the degree of stability of Voltage-Controlled Temperature Compensated Crystal Oscillator be ± 0.5ppm, after tested, crystal oscillator is-200～300Hz in the frequency change that 0～5V controls under the voltage, so select for use 10,000 to leave sufficient allowance for the counter of mould.It is 10 that the clock of 50MHz is sent into mould on the one hand, 000 counter is as count pulse, on the other hand as the clock rising edge of 1PPS pulse that goes to sample, the rising edge signal that collects just can be removed interrupt request singal as the interruption application signal with single-chip microcomputer of latching of counter automatically when count value is read in the outside.
The temperature stability of the actual Voltage-Controlled Temperature Compensated Crystal Oscillator of choosing is ± 0.5ppm, the old 1ppm that turns to, and the range of adjustment of control voltage is 0～5V, it is 12 TLC5618 that D/A selects conversion accuracy for use.The tuning voltage control algolithm is calculated tuning voltage according to the size of frequency error and zero error several two characteristic quantities second continuously, can be approximately the proportional component of band disturbance at the error model of place, equilibrium position Voltage-Controlled Temperature Compensated Crystal Oscillator, its control law is greater than 2 times of increments as tuning voltage getting error at 1 o'clock at frequency error, tabling look-up according to continuously zero error number and error polarity smaller or equal to 1 o'clock in error obtains the increment of tuning voltage, and the software flow of this part as shown in Figure 5.
The expansion of gps clock module peripheral hardware
For expanding the gps clock module more easily, the gps clock module comprises RS232 serial ports and PC104 bus with the avenues of communication of outside, can read the NEMA-0183 data of serial by RS232, can directly read NEMA-0183 data after the parsing by the PC104 bus, wherein the parsing of NEMA-0183 data realizes in single-chip microcomputer.
Data collecting card
The pci data capture card that native system uses is that parallel two channel data capture card transformations form.The pci data capture card is a second synchronizing signal, is output as sampling clock with the gps clock module with the 1PPS pulse, and two passages are independently finished the peak value of pulse collection apparatus and the lightning waveform acquisition of lightning radiation, by pci bus image data are delivered to industrial computer.
The data collecting card hardware configuration
Pci data capture card core algorithm has adopted the FPGA design, integrated level and reliability height.The highest sample frequency of the A/D converter that this machine uses is 70Msps, resolution is 12, peak value of pulse acquisition channel sample frequency is fixed as 50MHz, and Wave data section acquisition channel sample frequency is that 200K, 500K, 1M, 2M, 5M can establish, and the structure of data collecting card as shown in Figure 6.
Synchronous and peak value of pulse collection second
Second synchronously and the peak value of pulse acquisition principle as shown in Figure 7.Capture card is the sampling clock period counter in the rising edge of each 1PPS pulse resets second of capture card, make the count value of this counter can represent the accurate moment of certain peak value of pulse in this second, make the data of each distribution node that the unified time reference point arranged, realized that internodal timing is synchronous, and can eliminate the accumulated time error of system's long term monitoring effectively.The time window maximum value process is adopted in the identification of peak value of pulse, at first according to the characteristic of reality, for suitable time window width and triggering level are chosen in the peak value of pulse collection, capture card from second section start be search unit segment lookup maximal value with the window width, sequence number second of record maximal value correspondence, amplitude, pulse width and second interior sampling period count value, and be combined into pulse recording with four, if this maximal value amplitude is greater than the triggering level that sets then this pulse recording is pressed into the buffer memory of capture card, otherwise abandon this record.
The sampling time window method of searching may make a pulse of input produce two peak value of pulse records, when input pulse just may be exported several pulses during across several window, though this has brought the increasing of input quantity, but, when the data fusion of multi-site, thunder and lightning location Calculation, reduce the erroneous judgement of mistake or signal properties etc. for the identification of thunder discharge pulse has increased information.
The peak value of pulse collection greatly reduces data volume.For the peak value of pulse acquisition systems of 50MHz sample frequency, 12 A/D conversion, continuous wave is gathered second of time data throughout and is 100M slightly, the transmission of data, preserves and all there is very big difficulty in analysis.When adopting peak value of pulse to gather, if seclected time, window width was 10us, then conference produces 100,000 peak value of pulse record, each peak value of pulse record accounts for 6 bytes, and 1/166 when it always takes up room and gathers into continuous wave greatly reduces storage, transmission and the intractability of data.
Data segment is gathered
The data segment acquisition channel is used to gather fast electric field change signal, and the sample frequency of this passage is lower, and generally at 2MHz, but requirement can be carried out continuous acquisition to input under this frequency.For reducing the data volume of this passage, adopted the section acquisition mode, this passage has a triggering level and the sampling depth set according to actual conditions, the each triggering, a data segment of the set degree of depth of capture card meeting continuous acquisition.Each section is made up of section beginning flag, section initial second sequence number, the initial second interior moment of section, valid data and a section end mark.The beginning flag of section and end mark are to determine according to the attribute of signal, capture card A/D is 12, when capture card passes number to the upper strata, the number that continuous two collection values is spliced into one 24 passes to industrial computer by pci bus, the A/D value of corresponding 0 data of capture card is 0x0, the A/D value of corresponding full scale is 0xfff, then under normal circumstances can be double occur minimum to maximum or be up to the fusion of minimum, therefore the data of this passage are got the beginning flag that 0x000fff, 0x000fff are a section, get 0xfff000, the 0xfff000 end mark for section.
The data transfer of data collecting card and industrial computer
Adopt the pci bus Data transmission between capture card and industrial computer.Because gps data is passed to industrial computer by serial ports, image data is passed to industrial computer by pci bus, for the pci bus data that guarantee a certain second serial data and this second the time engrave can be correctly corresponding, the data transfer of pci data capture card must guarantee hard real time, therefore the data acquisition rising edge that is stuck in each 1PPS pulse all can interrupt to the industrial computer application, arrive in data volume and also can interrupt when a certain amount of to the industrial computer application, the industrial computer response is interrupted, and the data on the pci data capture card are all read industrial computer.
The above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model know-why; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (8)
1. all-lightning positioning system that very low frequency (VLF) combines with very high frequency(VHF), it is characterized in that, this system comprises at least four above lightning location monitoring stations, is provided with very low frequency (VLF) lightning radiation receiver, very high frequency(VHF) lightning radiation receiver, GPS receiver, industrial computer and pci data capture card in the described lightning location monitoring station; Be provided with peak value of pulse acquisition channel, data segment acquisition channel, second synchronization module, sampling clock module and pci controller in the described pci data capture card; Described very low frequency (VLF) lightning radiation receiver links to each other with described data segment acquisition channel, gathers the signal that described very low frequency (VLF) lightning radiation receiver detects by described data segment acquisition channel; Described very high frequency(VHF) lightning radiation receiver links to each other with described peak value of pulse acquisition channel, gathers the signal that described very high frequency(VHF) lightning radiation receiver detects by described peak value of pulse acquisition channel; Described GPS receiver links to each other with described second synchronization module; Described GPS receiver links to each other with described sampling clock module by the gps clock module; Described GPS receiver inserts the serial ports of described industrial computer, input GPS Serial Port Information; Described pci data capture card inserts the PCI slot that is provided with on the described industrial computer, by the pci bus Data transmission.
2. the all-lightning positioning system that very low frequency (VLF) as claimed in claim 1 combines with very high frequency(VHF), it is characterized in that, described very low frequency (VLF) lightning radiation receiver comprises receiving antenna, integrating amplifier, wave filter, the driving output circuit that connects successively, described receiver sends the signal that receives in the industrial computer mould/number conversion circuit and data recording equipment, and described receiver is used to survey and receives the transient electric field that lightning produces and change.
3. the all-lightning positioning system that very low frequency (VLF) as claimed in claim 1 combines with very high frequency(VHF), it is characterized in that, described very high frequency(VHF) lightning radiation receiver comprises receiving antenna, preselection filter, frequency converter, intermediate-frequency filter, logarithmic amplifier, the driving output circuit that connects successively, described receiver sends the signal that receives in the industrial computer mould/number conversion circuit and recording unit, and described receiver is used to survey the VHF radiation signal that lightning small scale discharge process produces.
4. the all-lightning positioning system that combines with very high frequency(VHF) as claim 2 or 3 described very low frequency (VLF)s, it is characterized in that, be provided with lightning impulse Wave data Acquisition Circuit and data processing software in the described industrial computer, described data processing software is used for analyzing, handles and extract lightning waveform, lightning waveform character parameter and lightning time of arrival (toa).
5. the all-lightning positioning system that very low frequency (VLF) as claimed in claim 4 combines with very high frequency(VHF), it is characterized in that, described GPS receiver, described very low frequency (VLF) lightning radiation receiver, described very high frequency(VHF) lightning radiation receiver are integrated in the described industrial computer, described GPS receiver is used for frequency reference and proofreaies and correct, export frequency signal accurately, also provide the precise time benchmark simultaneously to system.
6. the all-lightning positioning system that very low frequency (VLF) as claimed in claim 5 combines with very high frequency(VHF) is characterized in that, the antenna in the described very high frequency(VHF) lightning radiation receiver is a discone antenna, and described discone antenna is the linearly polarized wideband omnidirectional antenna.
7. the all-lightning positioning system that very low frequency (VLF) as claimed in claim 6 combines with very high frequency(VHF) is characterized in that, described data acquisition parts are provided with 2 independently sample channel, and the maximum data sampling rate of described two channels is respectively 5MS/s and 50MS/s.
8. the all-lightning positioning system that combines with very high frequency(VHF) as claim 2 or 3 described very low frequency (VLF)s, it is characterized in that, be provided with trigger circuit and storer in the described industrial computer, described trigger circuit are used for after monitor signal that capture card receives is greater than preset threshold, described trigger circuit are triggered and write down the lightning impulse waveform, extract the timestamp of lightning waveform character parameter and corresponding lightning incident, described data storage is arrived in the described storer, and send to the computing machine that is used for the lightning location processing by the internet simultaneously.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103278704A (en) * | 2013-05-30 | 2013-09-04 | 重庆绿色智能技术研究院 | Three-dimensional lightning detection system and method based on Beidou |
| CN103743958A (en) * | 2013-12-31 | 2014-04-23 | 国网电力科学研究院武汉南瑞有限责任公司 | Thunder and lightning detection device on basis of Beidou satellite timing system |
| CN106093601A (en) * | 2016-08-09 | 2016-11-09 | 中国气象科学研究院 | A kind of target lightning electric field change signal acquiring system and method |
| CN108594024A (en) * | 2017-12-11 | 2018-09-28 | 海南电网有限责任公司琼海供电局 | For the Lightning Warning method and apparatus of power supply area |
| CN110268774A (en) * | 2017-01-20 | 2019-09-20 | 谐振公司 | Use the communication control processor of multiple band transmission block filter |
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2009
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103278704A (en) * | 2013-05-30 | 2013-09-04 | 重庆绿色智能技术研究院 | Three-dimensional lightning detection system and method based on Beidou |
| CN103278704B (en) * | 2013-05-30 | 2016-04-06 | 中国科学院重庆绿色智能技术研究院 | A kind of three-dimensional lightning detection system based on the Big Dipper and method |
| CN103743958A (en) * | 2013-12-31 | 2014-04-23 | 国网电力科学研究院武汉南瑞有限责任公司 | Thunder and lightning detection device on basis of Beidou satellite timing system |
| CN106093601A (en) * | 2016-08-09 | 2016-11-09 | 中国气象科学研究院 | A kind of target lightning electric field change signal acquiring system and method |
| CN110268774A (en) * | 2017-01-20 | 2019-09-20 | 谐振公司 | Use the communication control processor of multiple band transmission block filter |
| CN110268774B (en) * | 2017-01-20 | 2021-06-04 | 谐振公司 | Communication receiver using multi-band transmission blocking filter |
| CN108594024A (en) * | 2017-12-11 | 2018-09-28 | 海南电网有限责任公司琼海供电局 | For the Lightning Warning method and apparatus of power supply area |
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