CN109063302A - The high-resolution solar radio radiation data processing system and method for adaptive outburst judgement - Google Patents
The high-resolution solar radio radiation data processing system and method for adaptive outburst judgement Download PDFInfo
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Abstract
The invention discloses the high-resolution solar radio radiation data processing systems and method of a kind of adaptive outburst judgement, which includes parabola antenna, high-speed ADC collector, FPGA and computer；Parabola antenna receives solar radio radiation signal, and exports two-way aerial signal to high-speed ADC collector；High-speed ADC collector is to convert the signal into high-speed digital signal to be transferred to FPGA；High-speed digital signal is intercepted and is segmented by FPGA, respectively to every section of progress FFT operation, digital polar synthesis is carried out in frequency domain, obtain the left-handed and dextrorotation solar radio radiation signal of circular polarisation, calculate solar radio radiation signal power, integral operation is carried out according to power of the temporal resolution to solar radio radiation signal, obtains solar radio radiation spectrum signal, and be uploaded to computer；Computer carries out adaptive outburst judgement and processing to solar radio radiation spectrum signal, stores to the data containing solar burst event according to high-resolution.
Description
Technical field
The present invention relates to solar radio radiation data processing fields, and in particular to the high-resolution that outburst judges a kind of adaptively is too
Positive radio data processing system and method.
Background technique
The solar radio radiation data of high time resolution and high frequency resolution are conducive to fine and accurately measure the sun and penetrate
It electric detonation hair driving shock wave, high energy electron energy, shock wave and electronics arrival time, also can more preferably Solar Physics research and space day
Gas monitoring provides more reliable data.So time and frequency resolution are the important indicators of solar radio radiation observation system, it is the world
The important indicator that each solar radio radiation observation station is pursued.For example, Chinese Academy of Sciences king another name for Sichuan Province Juan etc. is in Nation Astronomical Observatory Huairou radio frequency
Spectrometer increases new ultrahigh resolution observation mode, and temporal resolution can be up in 1.10-1.34GHz frequency band
1.25ms, frequency resolution 4MHz, and observe solar radio radiation fine structure event, it thereby it is assumed that, coronal mass ejection
It may be related to the drift systolic structures in lower corona.
DU described a kind of observation system that solar radio radiation is realized using high-speed collection card in 2017, and system interval is quantitative
Solar radio radiation signal is acquired, time domain data is directly stored, off-line analysis.But since high speed AD sampling rate is 1Gsps, ADC
Digit is 12, and 2 channels, high-speed data-flow 4GB/s, the PCIe of computer, hard disk speed are not caught up with.In addition, computer
Disk array capacity is also limited, and all data (14.4T/H) preservation is difficult.So using interval quantitative collection
The reduction of data, data volume sacrifices the sensitivity of system, this will cause due to data volume reduces in high time resolution and height
Image resolution ratio reduces when frequency resolution.Although using the scheme for carrying out the differentiation of Breakout events in FPGA, Ke Yishi
It is intensively acquired when outburst now, the sparse acquisition data of other times, still, since FPGA is hardware computation, capacity is limited, complicated
Judgement algorithm be difficult to carry out, and solar radio radiation signal intensity is more complicated, and in practical application, there is a large amount of interference in space
Signal produces very big influence to the judgement of Breakout events, cannot effectively reduce storage data quantity, these data can occupy
A large amount of memory spaces, frequently repeatedly read-write deletes data and reduces the disk service life, and huge data analysis needs machine duration, therefore,
Effectively judge that Breakout events and the non-outburst data storage capacity of reduction are just particularly important.Yunnan Observatory uses 11m paraboloid
Antenna receives 70-700MHz solar radio radiation signal, and temporal resolution reaches 2ms, frequency resolution 200KHz, in order to reduce
Left and right polarized signal timesharing is switched to frequency spectrograph using electronic switch and is acquired by cost, and it is left-handed that this results in one section of acquisition
Signal, lower a period of time acquire right hand signal, are not the same temporal circular polarisation composite signals of stricti jurise, are lost simultaneously
50% data also reduce the sensitivity of system 50%.
Currently, the relatively advanced metric wave radio observation system of all technical surely belongs to Japanese Tohoku university in the world
In the AMATERAS (Iwai et al., 2012) of research and development in 2010.The frequency range of AMATERAS observation is 150-500MHz,
Time and frequency resolution are up to 10ms and 61kHz (frequency spectrograph channel is 16384), and Observable left-right rotary polarization signal uses
IPRT (the Iitate Planetary Raido being made of identical 16.5*31 meters of the rectangle paraboloid in two sides
Telescope) antenna system.The system seems functional, however, the station is initially to be to monitor Jupiter electric signal and build
If, it not observes and builds exclusively for solar radio radiation；Local (Fukushima area) radio frequency interference is serious, this observation number from the system
It is clearly visible in；It may be to avoid these interference, the minimum 150MHz of the considerable measured frequency of the system can not observe II
The frequency highest partial region (e.g., Cane&Erickson, 2005 occur for the sudden and violent event of type；Subramanian&Ebenezer,
It 2006), therefore can not many Breakout events of complete documentation.
In conclusion in the prior art for can not many Breakout events of complete documentation, can not effectively judge Breakout events
The problem of with non-outburst data storage capacity is reduced, still shortage effective solution scheme.
Summary of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the present invention provides a kind of high-resolution of adaptive outburst judgement too
Positive radio data processing system and method, the data of all high-speed AD acquisitions are all applied, i.e. holding system sensitivity
Highest, high-speed data-flow are first pre-processed data by FPGA, and the speed data stream being transmitted on computer reduces, too judgement
Positive burst method is realized in computer, judges whether solar radio radiation breaks out by the radio flow of noiseless frequency point,
Temporal resolution can achieve 1ms or higher when outburst, and frequency resolution reaches 16KHz；When not breaking out, signal is integrated
Accumulated process reduces temporal resolution such as 100ms or lower, can finely observe sun deflagration hair and storage is peaceful
The data volume of quiet solar radio radiation signal.
The technical scheme adopted by the invention is that:
The first object of the present invention is to provide a kind of high-resolution solar radio radiation data processing system of adaptive outburst judgement
System, which includes parabola antenna, frequency conversion card, focal plane circuit, high-speed ADC collector, FPGA and computer；
The parabola antenna is configured as receiving solar radio radiation signal, and exports two-way aerial signal to frequency converter；
The frequency conversion card is configured as two-way aerial signal frequency conversion being four road aerial signals, and is transmitted to focal plane electricity
Road；
The focal plane circuit, is configured as being filtered aerial signal and enhanced processing, will treated that signal passes
Transport to high-speed ADC collector；
The high-speed ADC collector is configured as every road aerial signal being converted into high-speed digital signal, be transferred to
FPGA；
The FPGA, be configured as according to certain word length by four road high-speed digital signals intercept be segmented, respectively to every section into
Time domain solar radio radiation signal data is converted into frequency domain data by row FFT operation, and digital polar synthesis is carried out in frequency domain, is obtained
The left-handed and dextrorotation solar radio radiation signal of circular polarisation calculates solar radio radiation signal power, according to temporal resolution to solar radio radiation
The power of signal carries out integral operation, obtains solar radio radiation spectrum signal, and be uploaded to computer；
The computer is configured as carrying out solar radio radiation spectrum signal adaptive outburst judgement, to quick-fried containing the sun
The data of hair event are stored according to high-resolution, to the data for not containing solar burst event, compression processing are carried out, according to low point
Resolution storage.
Further, the computer includes PCIe interface, virtual flash disk, CPU, memory and disk array, is passed through
Treated that data are uploaded in the virtual flash disk of computer by PCIe interface by FPGA, in the CPU detection of computer is virtual
Whether there is new data packet to generate in deposit, if virtual flash disk has the generation of new data packets, will be stored in virtual flash disk
Old packet be read into memory, carry out adaptive outburst judgement and processing, will treated that data packet is stored in disk array
In, and data packet in virtual flash disk is deleted.
Further, the focal plane circuit includes amplifying circuit and filter circuit.
The second object of the present invention is to provide a kind of high-resolution solar radio radiation data processing side of adaptive outburst judgement
Method, method includes the following steps:
Initialization, setting compression frame number and solar burst amplitude；
Solar radio radiation data are acquired, and it is pre-processed, obtain solar radio radiation frequency spectrum data, form data packet；
New data packets generation is detected whether；
When detecting that new data packet generates, then adaptive outburst judgement is carried out to old packet；
If there are solar burst events in old packet, data packet is stored to disk battle array according to high time resolution
Column；
If solar burst event is not present in old packet, according to compression frame number compressed data, according to low time resolution
Rate stores compressed data packet to disk array.
Further, carrying out pretreated step to solar radio radiation data includes:
Filtering is amplified to solar radio radiation data, and is converted to high-speed digital data stream；
The interception of high-speed digital data stream is divided into several segments according to certain word length, respectively to every section of progress FFT operation, by when
Domain solar radio radiation data conversion carries out digital polar synthesis in frequency domain, obtains the left-handed and dextrorotation of circular polarisation at frequency domain data
Solar radio radiation data calculate solar radio radiation data power, integrate according to power of the temporal resolution to solar radio radiation data
Operation obtains solar radio radiation frequency spectrum data.
Further, the method for detecting whether new data packets and generating are as follows:
It will store comprising the data packet of solar radio radiation frequency spectrum data into the virtual flash disk of computer；
Computer constantly detects new data packet whether is generated in virtual flash disk；
If virtual flash disk has the generation of new data packets, computer reads the old packet stored in virtual flash disk
Into memory, adaptive outburst judgement and processing are carried out, it will be in treated data packet deposit disk array, and by virtual memory
The data packet stored in disk is deleted.
Further, the adaptive outburst judgment method are as follows:
The frequency spectrum of solar radio radiation frequency spectrum data packet is analyzed, if average in certain intervals from measurement frequency range choose
Dry noiseless frequency point；
Calculate the solar radio radiation flow for all frequency points chosen；
The difference of the solar radio radiation flow of the separated in time of all frequency points is compared with solar burst amplitude；
If the difference of two frames is more than the solar burst amplitude of setting before and after the solar radio radiation flow of frequency point, the frequency is judged
The data of point contain solar burst event, and calculate the average value of two frame solar radio radiation flows of frequency point, using the average value as
The solar burst threshold value of the frequency point；
In subsequent period of time, if the solar radio radiation flow value of the frequency point is more than the solar burst threshold value of setting, sentence
The data of the frequency point of breaking contain Breakout events.
Further, in all frequency points of selection, if the sun for having one of frequency point radio flow to be greater than setting is quick-fried
Threshold value to be sent out, then stops judgement immediately, this data packet is outburst data, data packet is completely saved in disk array disk, and
Delete the data packet in virtual flash disk.
Further, if the radio flow number for all frequency points chosen from data packet is respectively less than solar burst threshold value,
Then this data packet does not contain solar radio burst event, carries out compression processing to data, and the data addition of every setting frame number is asked
Average, new data packets are written in disk array new data packet after being compressed.
Compared with prior art, the beneficial effects of the present invention are:
(1) present invention acquires data using high-speed ADC, is pre-processed, is transmitted to high-speed data-flow by FPGA
Speed data stream on computer reduces, and judges solar radio burst by computer, can effectively judge Breakout events；
(2) present invention judges whether solar radio radiation breaks out by the radio flow of interference frequency point, time resolution when outburst
Rate can achieve 1ms or higher, and frequency resolution reaches 16KHz；When not breaking out, integral accumulated process is carried out to signal, is reduced
Temporal resolution such as 100ms or lower, can either many Breakout events of complete documentation, and effectively reduce storage quiet solar radio radiation
The data volume of signal；
(3) present invention uploads to computer by PCIe interface, is sentenced by computer to multifrequency point solar radio radiation flow
Not, the data containing solar burst event are stored according to high-resolution, to the data for not containing solar burst event, is carried out tired
Product operation reduces its temporal resolution, reduces non-outburst data storage capacity.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is the high-resolution solar radio radiation data processing system structural block diagram of adaptive outburst judgement；
Fig. 2 is computer-internal structural block diagram；
Fig. 3 is the high-resolution solar radio radiation data processing method flow chart of adaptive outburst judgement；
Fig. 4 (a) is solar radio burst event curve figure；
Fig. 4 (b) is the corresponding radio flow curve figure of 150-500MHz frequency range；
Fig. 5 is 2017-9-9 days solar radio radiation different frequent points radio flow changing curve figures；
Fig. 6 (a) is 017-9-9 days solar radio burst event curve figures；
Fig. 6 (b) is 2017-9-26 days solar radio radiation different frequent points radio flow changing curve figures；
Fig. 7 is the Breakout events curve graph of the new system on the 26th of September in 2017 observation；
Fig. 7 (a) is 100ms temporal resolution image；
Fig. 7 (b) is 10ms temporal resolution image；
Fig. 7 (c) is 1ms temporal resolution image；
Fig. 7 (d) is 0.1ms temporal resolution image；
Fig. 8 is the Breakout events curve graph of September 26 diurnal periodicity of quantitative collection systematic observation in 2017；
Fig. 8 (a) is 10ms temporal resolution solar radio radiation dynamic spectrum figure；
Fig. 8 (b) is 1ms temporal resolution solar radio radiation dynamic spectrum figure；
Fig. 9 is the dynamic spectrum figure detail view of high frequency resolution；
Fig. 9 (a) is the intensity map (100ms) of 160-170MHz frequency range；
Fig. 9 (b) is the intensity map (10ms) of 160-170MHz frequency range；
Fig. 9 (c) is the intensity map (100ms) of 200-210MHz frequency range；
Fig. 9 (d) is the intensity map (10ms) of 200-210MHz frequency range；
Figure 10 is the dynamic spectrum figure detail view for being spaced the high frequency resolution of quantitative collection system；
Figure 10 (a) is 160-170MHz dynamic spectrum figure (100ms)；
Figure 10 (b) is 160-170MHz dynamic spectrum figure (10ms).
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As background technique is introduced, Breakout events can not effectively be judged and reduce non-outburst number by existing in the prior art
According to amount of storage, it can not observe that the highest partial region of the frequency occurs for sudden and violent event, therefore can not many Breakout events of complete documentation
Deficiency, in order to solve technical problem as above, present applicant proposes a kind of high-resolution solar radio radiations of adaptive outburst judgement
Data processing system and method.
Embodiment 1:
In a kind of typical embodiment of the application, as shown in Figure 1, providing a kind of high score of adaptive outburst judgement
Resolution solar radio radiation data processing system, the system include parabola antenna, computer, high-speed data acquisition card and frequency conversion card；
High-speed data acquisition card and frequency conversion card use PCIe card structure, and the high-speed data acquisition card is by FMC subcard and FMC master card group
At FMC subcard carries the chips such as ADC, clock chip and balun, is responsible for high-speed data acquisition；FMC master card carry FPGA, DDR and
The chips such as PROM are responsible for igh-speed wire-rod production line；The main modular realized inside FPGA has: fifo module, FFT module, FIR filtering
Device, frequency mixer (multiplier), NCO module, PCIe module, MIG module etc..
The parabola antenna, be configured as receive 150-500MHz solar radio radiation signal, mechanically tracking track of sun,
Parabola antenna is logarithm period a period of time antenna, exports two paths of signals, is all the way horizontal antenna signal, another way is vertical antenna
Signal.
The frequency conversion card, is configured as every road aerial signal being divided into 2 sections, and 150-325MHz and 325-500MHz are obtained
Four road aerial signals.
Since high-speed ADC collector sample rate is small, the frequency of 150MHz~500MHz can not be directly acquired, therefore, is used
Frequency conversion card divides the signal into two sections, two segment signals is then upconverted to 875M intermediate frequency simultaneously again, simultaneously by high-speed ADC collector
Acquisition.
The focal plane circuit is configured as four road aerial signals carrying out front end amplification and filtering processing, after processing
Signal be transferred to fast ADC collector.
Specifically, the focal plane circuit includes amplifying circuit and filter circuit.
The high-speed ADC collector is configured as to amplify through front end and tetra- road signal of Hou being filtered being converted into height
Speed digital signal, and it is transmitted to FPGA.
In the present embodiment, the high-speed ADC collector is using 500Msps sample rate, the high-speed ADC collector of 14bit.
The FPGA is configured as carrying out FFT operation to four road high-speed data signals, digital polar conjunction is carried out in frequency domain
At, and data processing is carried out, the solar radio radiation spectrum signal of 1ms grades of temporal resolutions (16KHz frequency resolution) is obtained, is passed through
PCIe interface uploads to computer.
Specifically, four road high-speed data signals are intercepted segmentation according to the word length of FFT operation by the FPGA, and FPGA is right respectively
Every section of progress FFT operation, is converted into frequency domain data for time domain solar radio radiation signal data, and digital polar conjunction is carried out in frequency domain
At obtaining the left-handed and dextrorotation solar radio radiation signal of circular polarisation, solar radio radiation signal power calculated, according to temporal resolution to too
The power of positive electric signal carries out integral operation, solar radio radiation frequency spectrum data is obtained, in addition timestamp uploads to computer.
In the present embodiment, high-speed data signal is intercepted according to 32K word length and is segmented by FPGA, according to temporal resolution to the sun
The power of electric signal carries out accumulation add operation, reduces data volume.
The computer is configured as differentiating multifrequency point solar radio radiation flow, to containing solar burst event
Data are stored according to high-resolution, and to the data for not containing solar burst event, carrying out accumulation operation reduces its temporal resolution,
Reduce the data volume of such event.
Specifically, it is uploaded in the virtual flash disk of computer, is adopted by PCIe interface by FPGA treated data
With virtual memory techniques, by Primo Ramdisk software using 32GB memory virtual ram disk as data buffer area.FPGA pairs
4 road signals carry out 32K point FFT, and after generating power signal, every road 32KB amounts to 128KB, believe in temporal resolution power
Number accumulation summation operation (such as highest 1ms is as resolution ratio) is carried out, result uploads to computer, speed data stream by PCIe
For 128MB/s, generation data are about 460GB within 1 hour, and daily observation time 12 hours, data are about 5.4TB, it is clear that tens TB
Disk array can only store tens day datas, be unfavorable for observing needs for a long time.And in these data, high-resolution is carried out to it and is ground
The solar burst data studied carefully are seldom, are largely quiet solar radio radiation signal datas, are basically unchanged, and do not need high-resolution number
According to research quiet solar radio radiation high time resolution data, can change the temporal resolution acquisition sun at any time and penetrate if necessary
Electric data save.
Computer is further processed data are uploaded, and solar radio burst and not detonator signal are distinguished, and breaks out
When, according to highest temporal resolution 1ms storing data, about 128MB/s when not breaking out, saves number according to 100ms temporal resolution
According to, about 1.28MB/s, i.e., the 1 hour about data volume of 4.6GB effectively reduces storage data quantity.The data of the computer
Processing structure block diagram is as shown in Figure 2.
The embodiment of the invention provides a kind of high-resolution solar radio radiation data processing systems of adaptive outburst judgement, should
System receives solar radio radiation signal using parabola antenna, and high-speed AD digitizes solar radio radiation signal, carries out FFT by FPGA
Operation carries out digital polar synthesis in frequency domain, and carries out data processing, obtains 1ms grades of temporal resolutions (16KHz frequency point
Resolution) solar radio radiation spectrum signal, computer is uploaded to by PCIe interface, by computer to multifrequency point solar radio radiation flow
The case where being differentiated, being suitable for different time quiet solar radio radiation instability of flow, it is automatic that solar burst threshold value is set, and certainly
Dynamic triggering to solar radio radiation data according to its outburst whether carry out different processing, to the data containing solar burst event according to
High-resolution storage, to the data for not containing solar burst event, carrying out accumulation operation reduces its temporal resolution, effectively judges
Breakout events reduce the data volume of such Breakout events.
Embodiment 2:
Another exemplary embodiment of the application, as shown in figure 3, providing a kind of high-resolution of adaptive outburst judgement
Rate solar radio radiation data processing method.
(1) solar radio radiation flow disturbing factor is analyzed.
To effectively reduce data storage capacity, data are made whether to judge containing solar burst event.The sun is quick-fried
When hair, solar radio radiation flow can be significantly raised, tends towards stability when the sun is quiet, therefore, can use solar radio radiation flow parameter
To judge the Breakout events of the sun.Due to there are a large amount of interference, such as radio signals, noise jamming in space, these interference meetings
Lead to occur impulse disturbances and PERIODIC INTERFERENCE in data, influences the size variation of solar radio radiation flow, this is to solar burst
The accuracy of judgement has an impact.Solar radio radiation flow is also fluctuating, if Fig. 4 (a) is solar radio burst event；Fig. 4 (b) is
Its solar radio radiation flow (the total radio flow of 150-500MHz frequency range) change curve when solar radio burst, ordinate number in the figure
Value is performance number, for system measurement do it is following be calculated, P=(D/32768*0.8) 2 (D is system measurement), which is
It is 1 that relative quantity, which fixes tentatively unit, can be converted to SFU after system calibrating, needs a coefficient conversion.From solar radio radiation changes in flow rate
It can be seen that when solar burst, solar radio radiation flow is increasing figure, but when solar radio radiation is not broken out, radio flow also has prominent
The spike mutation of right acute variation, it is clear that accurate judgement solar burst is only difficult by total solar radio radiation flow.
Solar radio radiation dynamic spectrum data are researched and analysed, each frequency point radio flow diagram is drawn respectively and is subject to pair
Than as shown in figure 5, counting to the radio flow of 4 frequency points of solar radio burst event in Fig. 4 (b), Fig. 5 be can be seen that
262MHz frequency point radio flowed fluctuation is very big, and other 3 frequency points 195MHz, 205Mhz, 218MHz fluctuate very little, the only sun
When outburst, solar radio radiation flow is just significantly increased.Breakout events dynamic spectrum figure can be seen that in corresponding diagram 4 (b)
There are interfering stations on 262MHz frequency point, and other 3 noiseless radio signals of frequency point.Again to the outburst thing on the 26th of September in 2017
Part analysis even if do not have Breakout events, obtains equifinality as shown in Fig. 6 (a) and Fig. 6 (b).Obviously solar radio radiation stream is caused
Amount fluctuation is mainly caused by station interference, and the radio station especially having is pulsed, is interfered more strong.
Therefore, station interference signal is solar radio radiation flow disturbing factor.
(2) it is described it is adaptive outburst judgement high-resolution solar radio radiation data processing method specifically includes the following steps:
Step 201: initialization, setting compress frame number and judge solar burst amplitude for the first time.
The compression frame number is set as 100 frames, if data packet does not contain solar radio burst event, data are handled,
The data of every 100 frame are added to be averaging and become a frame, newly-generated packet time resolution ratio reduces by 100 times, as
100ms, then in new data packets write-in disk array, effectively reduces quiet sun data volume by 100 times of size reduction.
The solar burst amplitude of setting, for judging solar burst event.
Step 202: acquisition solar radio radiation data, and it is pre-processed, obtain solar radio radiation frequency spectrum data.
The solar radio radiation data that 150-500MHz is received using 6m parabola antenna, too by high-speed data acquisition card acquisition
Positive radio data, and it is pre-processed.
Specifically, solar radio radiation data are converted to high-speed figure number by the high-speed ADC collector on high-speed data acquisition card
According to stream, the high-speed digital data stream after conversion is pre-processed by FPGA on high-speed data acquisition card, and FPGA will according to 32K word length
The interception of high-speed digital data stream is divided into several segments, and FPGA is respectively to every section of progress FFT operation, by time domain solar radio radiation data conversion
At frequency domain data, digital polar synthesis is carried out in frequency domain, obtains the left-handed and dextrorotation solar radio radiation data of circular polarisation, is calculated too
The power of positive radio data carries out cumulative addition according to power of the temporal resolution to solar radio radiation data, obtains solar radio radiation
Frequency spectrum data is uploaded in the virtual flash disk of computer by PCIe interface.
Step 203: detecting whether that new data packet generates.
High-speed data is first temporarily stored on the virtual flash disk of computer, carries out judging whether it is outburst number to its data packet
According to, carry out respective handling respectively, judge outburst whether with processing data time be less than high-speed data generation time, ability
Realize the real-time processing of data, and the plenty of time can be occupied by reading data and storing data, the present invention is passed using the high speed of memory
Defeated speed carries out the read-write operation of data in virtual flash disk, can largely reduce access time.
It is 3.5GB/s that data test speed is transmitted between virtual flash disk and memory, can satisfy the demand of high speed processing.
Data are read into memory from virtual flash disk, are judged data and are handled, its data speed of data that treated reduces,
It can be directly stored in disk array.
Specifically, the data of high speed acquisition persistently upload in the virtual flash disk of computer, and computer constantly detects
Whether there is new data packets generation in virtual flash disk, there is a buffered data packet in the virtual flash disk always, be denoted as nth
According to packet, when new data packet generates in the virtual flash disk that i.e. (n+1)th data packet is transmitted to computer, computer is started to process
Nth data packet, can not only guarantee the integrality of data packet in this way, but may be implemented transmission with handle it is parallel, it is preferably hidden
The time for having hidden data packet transmission, further increase arithmetic speed；It is deleted after having handled nth data packet, is counted until newly
Starting (n+1)th data packet of processing, is thus analyzed, at system when according in the raw virtual flash disk for beginning to transfer to computer of contracting for fixed output quotas
The speed of reason data packet needs to be greater than the speed that new data packets generate, and processing in real time just can be achieved.
Step 204: the outburst of multifrequency point solar radio radiation adaptive-flow differentiates.
It can be seen from the above, caused by being mainly station interference signal the factor that solar radio radiation flow interferes, in order to accurate
Judge solar radio burst event, could be used without the variation of the solar radio radiation flow of the frequency point of station interference, being as foundation can
Capable.And the corresponding band limits of solar radio burst is not fixed, for this purpose, analysis receives according to receiver position
To the frequency spectrum of solar radio radiation frequency spectrum data, the frequency range in the radio station that avoids interference is extracted from the measurement frequency range of 150MHz~500MHz
20 frequency points not interfered with, equispaced 17.5MHz extract a frequency point, encounter radio station frequency point, appropriate to deviate.It can be preferable
The signal of ground covering measurement frequency range, avoids omitting lesser frequency range Breakout events, and avoid and interfere more frequency range, subtract
Small judgement handles the time.
From Fig. 5 and Fig. 6 (b) as can be seen that interfering less frequency point, curve fluctuation is smaller when the sun is quiet, and breaks out
When curvilinear motion it is more obvious, be conducive to judgement.
Selected frequency point radio flow is calculated and counted, quiet solar radio radiation flow when discovery is not broken out is not
Also there is small variation with the period.According to Space Weather Services website data, statistics is randomly selected 2013
Since without breaking out some times, 245MHz frequency point solar radio radiation data are shown in Table 1, available same conclusion, although rather
Quiet solar radio radiation can be changed in long a period of time, but variation range is smaller in the short period, much smaller compared with breaking out variation.
1 245MHz frequency point quiet solar radio radiation flow of table
By observing historical data, solar burst initial phase, radio flow starts to increase, when separated in time increases
Value thinks Breakout events occur when being more than setting numerical value, this setting value is set to solar burst amplitude, which can
It is arranged by system, for judging solar burst event.
Solar radio burst typically lasts for event greater than 1S, and in order to reduce operand, system interval 500ms is once compared
Compared with judgement, it both ensure that the solar burst event of short period can effectively judge, it is too short in turn avoid interval time, judgement time
Number excessively will affect processing speed.The interval time may be alternatively provided as 100ms.
When the solar radio radiation flow difference of two frames of frequency point interval 500ms is more than the solar burst amplitude of setting, then sentence
This data of breaking contain Breakout events, and the numerical value of two frames is averaging, this average value is set as to the solar burst threshold value of the frequency point,
For judging next Breakout events.Each settable independent solar burst threshold value of frequency point, as long as one of frequency point
When solar radio radiation flow value is more than the threshold value of setting, then judges that the data packet of this frequency point contains Breakout events, this data packet is pressed
According to highest temporal resolution storing data.Until solar burst terminates, radio flow parameter declines and tends to be steady, and acquires data
Lower than solar burst threshold value, it is judged as non-outburst data.The method is suitable for different time quiet solar radio radiation instability of flow
The case where, the threshold value of resetting outburst daily, when breaking out, setting breaks out threshold value automatically.
But when the sun is in and persistently breaks out, radio flow can be for a long time steadily in higher numerical value, numerical value at this time
Fluctuation be not above the solar burst amplitude of setting, if occurring the case where sun is persistently broken out at the very start in acquisition, on
It states method to be then difficult to judge, to avoid this extreme case, the present invention will be higher solid to each frequency point radio flow set one
Determine threshold value and assist judgement, when solar radio radiation flow value is more than this fixed threshold, then also thinks that current data contains Breakout events.
Specifically, after detecting that new data packet uploads in virtual flash disk, system is from data packet every 500 frames
20 specified frequency point datas in 1 frame read data packet are taken, are judged according to the method described above, in 20 frequency points of selection,
If there is one of frequency point radio flow to be greater than setting solar burst threshold value, stop judgement immediately, this data packet is outburst number
According to data packet being completely saved in disk array disk, and delete the data packet in virtual flash disk；If being taken out from data packet
The radio flow number of all frequency points taken is less than solar burst threshold value, then this data packet does not contain solar radio burst event,
Data are handled, averaging is added to the data of every 100 frame and becomes a frame, newly-generated packet time resolution ratio drop
It low 100 times, as 100ms, 100 times of size reduction, then in new data packets write-in disk array, effectively reduces peaceful
Quiet sun data volume.
Non- outburst data are handled, and outburst data are maintained at high time resolution, when both realizing high in this way
Between observation under resolution ratio to solar radio burst, and reduce the data volume of quiet sun time, saved disk space, and
Which can differentiate more intuitively as the data containing Breakout events in the data analysis in later period, reduce analysis time.
The embodiment of the invention provides a kind of high-resolution solar radio radiation data processing methods of adaptive outburst judgement, should
Method all applies the data of all high-speed AD acquisitions, i.e., holding system sensitivity highest, high-speed data-flow first by
FPGA pre-processes data, and the speed data stream being transmitted on computer reduces, and judgement solar radio burst forwarding method is being counted
It realizes in calculation machine, judges whether solar radio radiation breaks out by the radio flow of noiseless frequency point, temporal resolution can when outburst
To reach 1ms or higher, frequency resolution reaches 16KHz；When not breaking out, integral accumulated process is carried out to signal, reduces the time
Resolution ratio such as 100ms or lower can finely observe the number of sun deflagration hair and storage quiet solar radio radiation signal
According to amount.
The present invention is suitable for the case where different time quiet solar radio radiation instability of flow, automatic that solar burst threshold is arranged
Value, and automatic trigger to solar radio radiation data according to its outburst whether carry out different processing, in all frequency points of selection, if
There is one of frequency point radio flow to be greater than the solar burst threshold value of setting, then stop judgement immediately, this data packet is outburst number
According to data packet being completely saved in disk array disk, and delete the data packet in virtual flash disk；If being selected from data packet
The radio flow number of all frequency points taken is respectively less than solar burst threshold value, then this data packet does not contain solar radio burst thing
Part carries out compression processing to data, and the data of every setting frame number are added and are averaging, new data packet after being compressed will be new
Data packet is written in disk array.
Embodiment 3:
A specific Application Example is set forth below.
After test, system starts trial operation in the observation station Cha Shan.In order to be spaced quantitative sampling protocol with original
Comparison, after aerial signal amplification filtering, power splitter is respectively connected to 2 systems, carries out while acquiring reception work.Fig. 7 is
The solar radio radiation dynamic spectrum figure that the new observation system on the 26th of September in 2017 observes, wire part is identification in Fig. 7 (a)
Breakout events, the area data are 1ms resolution ratio, 100ms resolution ratio around other, in order to further analyze the event, wire
The interior high time resolution that can carry out is analyzed, in order to be become using solar radio radiation before and after high time resolution analysis Breakout events
Change situation, system is improved, can set front and back save how long the data of high time resolution.Fig. 7 (b) is its 10ms
Dynamic spectrum figure, Fig. 7 (c), Fig. 7 (d) be 1ms portion dynamic spectrum figure.As can be seen from the figure different time
The difference of dynamic spectrum figure clarity under resolution ratio, can be clearly from the dynamic spectrum figure of highest temporal resolution 1ms
Subtle variation during to solar burst meets the requirement of high time resolution analysis.
For comparative illustration problem, quantitative collection will be spaced and receive the signal that system receives, according to same time resolution
Rate draws identical dynamic spectrum figure to same period solar radio radiation.Fig. 8 (a), Fig. 8 (b) respectively with Fig. 9 (b), Fig. 9 (c) phase
Corresponding, temporal resolution is the same, it can be seen that Fig. 8 (a), Fig. 8 (b) solar radio radiation dynamic spectrum figure are obviously unintelligible, details point
Distinguish thick grain, significance is substantially reduced, and is mainly spaced a large amount of data of quantitative collection system loss.
The frequency resolution of system is counted by system ADC sample rate and FFT operation and is determined, sample rate 500Msps, FFT
Points are 32K, frequency resolution 16KHz.It, can be by the frequency range exhibition of care in order to observe sun exit point frequency variation details
It opens.In order to keep must sensitivity, when high frequency resolution, accordingly to reduce temporal resolution.Fig. 9 is same band frequency model
Solar radio radiation signal is enclosed, in the comparison of different time resolution ratio, Fig. 9 (a) and Fig. 9 (b) figure are 100ms the and 10ms time point respectively
The dynamic spectrum figure of 160-170MHz frequency range under resolution, Fig. 9 (c) and Fig. 9 (d) are also under 100ms and 10ms temporal resolution
200-210MHz frequency range dynamic spectrum figure.It can be seen that Fig. 9 (a) seems more clear with Fig. 9 (c) since temporal resolution is low
It is clear, more it is observed that frequency changes details, that is, to see the details of the dynamic spectrum figure of more clearly frequency resolution,
Reduce temporal resolution.By can according to need and obviously observe to different time resolution ratio and frequency field expansion observation
The fine structure of various solar radio radiations.
Figure 10 is that interval quantitative collection systematic observation data are analyzed, it can also be seen that Figure 10 (a), Figure 10 (b) points
Not corresponding with Fig. 9 (a), Fig. 9 (b), the significance of the dynamic spectrum figure of Figure 10 is significantly lower than Figure 10.
The present invention judges whether realizing to the outburst of solar radio radiation signal, is suitable for different time quiet solar radio radiation
It is the case where instability of flow, automatic that solar burst threshold value is set, it solves the problems, such as to judge using fixed threshold insensitive.And from
Dynamic triggering to solar radio radiation data according to its outburst whether carry out different processing, when outburst, protects according to 1ms high time resolution
Deposit data analyzes the fine structure under its high time resolution convenient for studying solar radio solar radio burst, helps to understand the sun
The understanding of solar flare and coronal mass ejection (CME) process and its dynamic process；When not breaking out, according to low temporal resolution
100ms saves data, reduces storage data quantity, as storage of history data P, to study solar radio radiation signal change in long term rule
Rule.By Experimental comparison, the program will receive solar radio radiation signal all of, than interval quantitative sampling system obtain the sun
Radio dynamic spectrum figure sensitivity is higher.
Resolution ratio of the invention can be further improved, and in order to keep corresponding clarity, if improving temporal resolution, need
Reduce frequency resolution.The present invention has carried out the FFT operation of 32K word length to solar radio radiation signal, and frequency resolution is
16KHz, highest temporal resolution reach 1ms, if reducing FFT operation word length, frequency resolution are reduced, such as 3.2K word length FFT
Operation, when frequency resolution is 160KHz, under conditions of same data volume, the temporal resolution of 0.1ms is may be implemented in system.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (9)
1. a kind of high-resolution solar radio radiation data processing system of adaptive outburst judgement, characterized in that including paraboloid day
Line, frequency conversion card, focal plane circuit, high-speed ADC collector, FPGA and computer；
The parabola antenna is configured as receiving solar radio radiation signal, and exports two-way aerial signal to frequency converter；
The frequency conversion card is configured as two-way aerial signal frequency conversion being four road aerial signals, and is transmitted to focal plane circuit；
The focal plane circuit, is configured as being filtered aerial signal and enhanced processing, will treated that signal is transmitted to
High-speed ADC collector；
The high-speed ADC collector is configured as every road aerial signal being converted into high-speed digital signal, is transferred to FPGA；
The FPGA is configured as that four road high-speed digital signals are intercepted segmentation according to certain word length, respectively to every section of progress FFT
Time domain solar radio radiation signal data is converted into frequency domain data by operation, and digital polar synthesis is carried out in frequency domain, obtains circular polarisation
Left-handed and dextrorotation solar radio radiation signal, solar radio radiation signal power is calculated, according to temporal resolution to solar radio radiation signal
Power carries out integral operation, obtains solar radio radiation spectrum signal, and be uploaded to computer；
The computer is configured as carrying out solar radio radiation spectrum signal adaptive outburst judgement, to containing solar burst thing
The data of part are stored according to high-resolution, to the data for not containing solar burst event, compression processing are carried out, according to low resolution
Storage.
2. the high-resolution solar radio radiation data processing system of adaptive outburst judgement according to claim 1, feature
It is that the computer includes PCIe interface, virtual flash disk, CPU, memory and disk array, by FPGA treated data
It is uploaded in the virtual flash disk of computer, whether is had in the CPU detection virtual flash disk of computer new by PCIe interface
Data packet generates, if virtual flash disk has the generation of new data packets, the old packet stored in virtual flash disk is read
In memory, adaptive outburst judgement and processing are carried out, it will be in treated data packet deposit disk array, and by virtual flash disk
Middle data packet is deleted.
3. the high-resolution solar radio radiation data processing system of adaptive outburst judgement according to claim 1, feature
It is that the focal plane circuit includes amplifying circuit and filter circuit.
4. a kind of high-resolution solar radio radiation data processing method of adaptive outburst judgement, characterized in that the following steps are included:
Initialization, setting compression frame number and solar burst amplitude；
Solar radio radiation data are acquired, and it is pre-processed, obtain solar radio radiation frequency spectrum data, form data packet；
New data packets generation is detected whether；
When detecting that new data packet generates, then adaptive outburst judgement is carried out to old packet；
If there are solar burst events in old packet, data packet is stored to disk array according to high time resolution；
It, will according to low temporal resolution according to compression frame number compressed data if solar burst event is not present in old packet
Compressed data packet is stored to disk array.
5. the high-resolution solar radio radiation data processing method of adaptive outburst judgement according to claim 4, feature
It is to carry out pretreated step to solar radio radiation data to include:
Filtering is amplified to solar radio radiation data, and is converted to high-speed digital data stream；
The interception of high-speed digital data stream is divided into several segments according to certain word length, respectively to every section of progress FFT operation, too by time domain
Positive radio data conversion carries out digital polar synthesis in frequency domain, obtains the left-handed and dextrorotation sun of circular polarisation at frequency domain data
Radio data calculate solar radio radiation data power, carry out integral operation according to power of the temporal resolution to solar radio radiation data,
Obtain solar radio radiation frequency spectrum data.
6. the high-resolution solar radio radiation data processing method of adaptive outburst judgement according to claim 4, feature
It is the method for detecting whether new data packets and generating are as follows:
It will store comprising the data packet of solar radio radiation frequency spectrum data into the virtual flash disk of computer；
Computer constantly detects new data packet whether is generated in virtual flash disk；
If virtual flash disk has the generation of new data packets, computer reads the old packet stored in virtual flash disk interior
In depositing, progress adaptively outburst judgement and processing, by treated, data packet is stored in disk array, and will be in virtual flash disk
The data packet of storage is deleted.
7. the high-resolution solar radio radiation data processing method of adaptive outburst judgement according to claim 4, feature
It is the adaptive outburst judgment method are as follows:
The frequency spectrum of solar radio radiation frequency spectrum data packet is analyzed, averagely chooses several in certain intervals from measurement frequency range
Noiseless frequency point；
Calculate the solar radio radiation flow for all frequency points chosen；
The difference of the solar radio radiation flow of the separated in time of all frequency points is compared with solar burst amplitude；
If the difference of two frames is more than the solar burst amplitude of setting before and after the solar radio radiation flow of frequency point, the frequency point is judged
Data contain solar burst event, and calculate the average value of two frame solar radio radiation flows of frequency point, using the average value as the frequency
The solar burst threshold value of point；
In subsequent period of time, if the solar radio radiation flow value of the frequency point is more than the solar burst threshold value of setting, judgement should
The data of frequency point contain Breakout events.
8. the high-resolution solar radio radiation data processing method of adaptive outburst judgement according to claim 7, feature
It is in all frequency points of selection, if there is one of frequency point radio flow to be greater than the solar burst threshold value of setting, to stop immediately
Only judge, this data packet is outburst data, and data packet is completely saved in disk array disk, and is deleted in virtual flash disk
Data packet.
9. the high-resolution solar radio radiation data processing method of adaptive outburst judgement according to claim 7, feature
It is that, if the radio flow number for all frequency points chosen from data packet is respectively less than solar burst threshold value, this data packet is free of
There is solar radio burst event, compression processing is carried out to data, the data of every setting frame number are added and are averaging, after obtaining compression
New data packets are written in disk array new data packet.
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