CN104749429A - Lightning overvoltage signal losslessly compressing and recording system - Google Patents
Lightning overvoltage signal losslessly compressing and recording system Download PDFInfo
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Abstract
The invention provides a lightning overvoltage signal losslessly compressing and recording system and aims to solve the problem that multiple data is lost during recording of the lightning overvoltage signal. The lightning overvoltage signal losslessly compressing and recording system comprises a voltage signal collecting unit, an overvoltage judging module, a compressing unit and a joint unit. The voltage signal collecting unit collects a voltage signal of a measuring field and converts the voltage signal into real-time data in the digital signal form. The digital signal is stored and covered through a shift register. The overvoltage judging module judges whether or not the real-time data is transient overvoltage and selects transmission processes according to the judgment results. The transmission processes include a special compressing process and a non-compressing process which are selected by a transient overvoltage signal arbitration channel. The real-time data is compressed by the compressing unit. After the transmission is converted, data packages of the two processes are jointed by the joint unit. According to the arrangement, in case of the typical interval between two lightnings is 200 ms, the key signal is automatically identified and losslessly transmitted.
Description
Technical field
The present invention relates to a kind of on-the-spot test of lightning surge signal, intelligent discrimination, dynamic compression and packed data splicing field, provide a kind of lightning surge signal lossless packed record system.
Background technology
The digital automatic recording mode development of overvoltage signal test macro forward, utilizes up-to-date microelectronics integrated technology, electronic circuit technology and computer technology, makes overvoltage signal test macro gently little, portable, carry powered battery, and multiple functional.
Most current overvoltage signal test macro can meet typical lightning surge requirement of withstand voltage substantially, but the frequency of lightning surge signal higher (being interposed between about 200ms between typical thunder-strike phenomenon), therefore, we must adopt the ability of data acquisition at a high speed can completely to capture this signal.The problem brought thus is that data volume is excessive and cannot, data acquisition and end of transmission between twice thunderbolt, make to lose data of being repeatedly struck by lightning in data acquisition.
Mention above, the frequency of lightning surge signal is higher, because we must adopt the ability of data acquisition at a high speed can completely to capture this signal.Under normal circumstances, we adopt the sampling rate of more than 40MHz to carry out work.If the problem brought thus is the signal (100ms) with 40MHz frequency collection 5 power frequency periods, single channel just has the data of 8M byte, if there are 8 road signal demand records, then has the data of 64M byte to produce.Under normal circumstances, so huge data volume is from having collected the transmission needs time of more than 0.5 second, and during this period, equipment to carry out new record.And twice typical thunder-strike phenomenon is spaced apart about 200ms, therefore, in the process of record lightning surge, repeatedly data can be lost.
Summary of the invention
For above-mentioned technical matters, this law invention provides the special signal lossless packed record system of a kind of lightning surge, and its fundamental purpose is:
One, solve in lightning surge data acquiring and recording process, the problem of data can be lost repeatedly.
Two, secondly by achieving a kind of distinctive signal loss-free compression process based on hardware-compressed algorithm.Owing to measuring in application in lightning surge, user is only concerned about that the data details in the certain hour of front and back occurs thunder and lightning signal, and therefore, the application adopts intelligent compression process, reduces the data that record produces, and improves running efficiency of system.
The present invention is by the following technical solutions to achieve these goals:
A kind of lightning surge signal lossless packed record system, it comprises:
Voltage signal acquisition unit: the voltage signal gathering measure field, and the voltage signal collected is converted to the real time data of digital signals format, this digital signal is undertaken storing, covering by shift register;
Superpotential judge module: whether be that transient overvoltage distinguishes to real time data, and according to distinguishing that result selects transmitting procedure; Transmitting procedure comprises special compression process and non-compression process, and these two kinds of transmitting procedures are by transient overvoltage signal arbitration channel selecting;
Compression processing unit: compression process is realized to real time data;
Data concatenation unit: after transmitting procedure changes, the packet of two kinds of processes is spliced, exports final packed data.
In technique scheme, when being determined as transient overvoltage, real time data adopts not compression process, obtains the not compressed data packets comprising packet header and packet;
After binary channels streamline compression unit switching channel, compression process no longer will produce data, self-assembling formation bag tail.This compressed data packets continuous arrangement in units of section, have obvious difference, therefore this bag tail can be judged with the packet header of not compressed data packets by agreement.And packed data length is not fixed, therefore judge data handbag tail by counter.
When being determined as non-transient overvoltage signal and occurring, special compression process is adopted to real time data, obtain the compressed data packets comprising packet header and packet.
In technique scheme, after binary channels streamline compression unit switching channel, compression process no longer will produce data, self-assembling formation bag tail.This compressed data packets continuous arrangement in units of section, have obvious difference, therefore this bag tail can be judged with the packet header of not compressed data packets by agreement.And packed data length is not fixed, therefore judge data handbag tail by counter.
When being determined as non-transient overvoltage signal and occurring, special compression process is adopted to real time data, obtain the compressed data packets comprising packet header and packet.
In technique scheme, data packet head only contains the start information of packet, and does not comprise the information such as length, bag tail of compressed package, and the afterbody of packet can judge according to agreement.
In technique scheme, when testing lightning surge signal, the mode that data concatenation unit will be judged by agreement, finds the bag tail of the compressed data packets after special compression process, and waits for the packet header of not compressed data packets, the two splicing is exported.And do not need special splicing after packed data end-of-packet.Because the end of compressed data packets, i.e. the generation of overvoltage signal is random occurrence, in Channel-shifted process, there is sequential time delay, therefore needs to splice to come cover part repeating signal by data.And the length of compressed data packets is not fixed, namely system avoids the repetition of not packed data and packed data by counter.So compressed data packets not after compressed data packets directly in memory address continuously just can, and do not need special splicing.
In technique scheme, special compression process is based on LZRW compression algorithm.
In technique scheme, superpotential judge module, according to the data peaks of real time data, carries out Intelligent Dynamic and switches transmitting procedure.
In technique scheme, when transient overvoltage signal being detected, the data in shift register by whole disposable feedings not compression process, to realize negative delay.
Specific implementation process of the present invention is, in gatherer process, when non-transient overvoltage signal occurs, adopts special compression process, and this compression process is based on hardware-compressed algorithm realization process; When differentiating generation lightning surge, adopt not compression process, to ensure accuracy and the integrality of raw data.These two kinds of processes are intelligent switching at runtime when system cloud gray model, ensure that key signal is not lost, and data volume significantly reduces.After tested, the data volume originally once gathered is up to 64M, and after special signal lossless compression process, only have 7M byte, data volume is reduced to 1/10th of former mode.By this design, under can be implemented in intensive thunderbolt situation (twice thunderbolt interval representative value 200ms), ensure that the complete documentation of lightning surge signal each time.
Below technical scheme of the present invention and invention main points:
One, whether the application can have superpotential to produce by intellectual determination, by specialized hardware compression algorithm integrated in system FPGA and logic, realizes the signal lossless compression special to transient state lightning surge and stores, improve the transfer rate of data.The present invention is the sophisticated equipment of superpotential field of test instrument based on dynamic compression technology.
Two, negative delay technology.Signal differentiates and automatic data logging technology, is one and easily realizes and the technology generally applied.But in igh-speed wire-rod production line process, when equipment Inspection is to signal, signal may terminate.Especially as thunder and lightning overvoltage signal detects, tester may be interested in whole lightning waveform, therefore after lightning strike signals being detected, needs to transmit partial history data, introduces negative delay technology thus." lightning surge signal lossless packed record system " has used this technical concept just, and according to system own situation and lightning performance, determines negative delay duration, optimizes the read-write sequence of negative delay, to improve its read-write efficiency.
Three, special compression process.At present, the existing case much being improved data transmission efficiency by compression algorithm in industry, and be mostly applied to Practical Project.My company considers singularity and the specific aim of lightning surge collection for the compression process based on hardware-compressed algorithm designed by " lightning surge signal lossless packed record system ".Its concrete property shows and is realized by hardware pipeline, and the crucial sampling point of superelevation compression ratio, fundamental frequency is demarcated and spliced the process of mouth.
Four, not compression process.The not packed data transmitting procedure designed by " lightning surge signal lossless packed record system " of the application has its special characteristics, and it is in particular in the data volume size of applicable thunder and lightning signal and the process of splicing mouth.
Five, compression and not packed data splicing.In order to simplify decompression procedure, being convenient to the exploitation of client's secondary software, a kind of Digital Logic method that above-mentioned two kinds of data can be stitched together of my company designs, by increasing the method for data packet head, data being realized seamless spliced.
Six, by these four gordian techniquies of above one at least five, the integrality of lightning surge collection and degree of accuracy is made all to meet engine request.
Therefore, " lightning surge signal lossless packed record system " is actually analog line design and the Design of Digital Circuit of ingenious advanced person, the crystallization of a series of mathematical measures such as the negative delay of deformation based register.
Accompanying drawing explanation
Fig. 1 is fundamental diagram of the present invention;
Fig. 2 is working timing figure of the present invention;
Fig. 3 is compression process sequential chart of the present invention;
Fig. 4 is that data of the present invention send into schematic diagram;
Fig. 5 is compression process compressed package figure of the present invention;
Fig. 6 is packed data of the present invention splicing schematic diagram;
Fig. 7 is top-level module pinouts of the present invention;
Fig. 8 is simulation result schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, also by best embodiment, the present invention is described in detail.
Lightning surge signal lossless packed record system provided by the invention by following process implementation from simulating signal input, distinguish overvoltage signal, compression process, splice to data export whole acquisition function:
(1) collect voltage signal: by the voltage signal at high-speed signal acquisition unit testing scene, this voltage signal, under the process gathering steering logic, is converted into the discernible digital signal of computing machine.This digital signal is undertaken storing, covering by shift register.
(2) whether the differentiation of overvoltage signal and compression process: by binary channels streamline compression unit is that transient overvoltage distinguishes and according to distinguishing that result selects transmitting procedure to the data in shift register.This unit has two kinds of transmitting procedures, i.e. special compression process and non-compression process, and the former can reach 93% ± 2% by compression ratio, compresses for non-critical signals; The latter is the special lossless data transmitting procedure with data packet head, transmits for key signal.These two transmitting procedures, by transient overvoltage signal arbitration channel selecting, when there is transient overvoltage, adopt not compression process, in addition, use special compression process.
(3) after compression process changes, system is spliced by the packet of packed data concatenation unit to two kinds of processes, and the final packed data that this unit exports can pass through a kind of algorithm decompress(ion), without the need to difference decompress(ion).
Consult Fig. 1, first set forth whole lightning surge signal lossless packed record System Working Principle.
By the voltage signal at high-speed signal acquisition unit testing scene, this voltage signal, under the process gathering steering logic, is converted into the discernible digital signal of computing machine.This digital signal is undertaken storing, covering by shift register.
At binary channels streamline compression unit, whether transient overvoltage signal arbitration passage will be that transient overvoltage distinguishes and according to distinguishing that result selects transmitting procedure to live signal.When there is transient overvoltage, adopting not compression process, in addition, adopting special compression process.
After transmitting procedure changes, system is spliced by the packet of packed data concatenation unit to two kinds of processes, this splicing can be subject to the control from transient overvoltage signal arbitration passage, the special signal lossless packed data that this unit exports can pass through a kind of algorithm decompress(ion), without the need to difference decompress(ion).
Consult Fig. 2, set forth emphatically the special sequential of the course of work of the present invention.
Common collection/the transmitting procedure generally used in a kind of industry is illustrated in figure.In this process, we adopt 40MHz sampling rate, gather the signal (100ms) of 5 power frequency periods, by producing the data of single channel 8M byte, if 8 road signals gather jointly, then have the data of 64M byte to produce.So huge data volume spends altogether nearly 500ms time tranfer complete, and for intensive thunderbolt situation (the interval representative value that is namely struck by lightning is 200ms), this will miss part lightning strike signals.
And by the special signal lossless compression collection/transmitting procedure designed by my company, find after tested, complete and equally once transmit the time used and more than 120ms, the integrality of intensive thunder and lightning signal can not be significantly improved.This has benefited from two reasons:
1. the significantly minimizing of data volume.Find after tested, by the special signal lossless compression process designed by my company, one time 8 channel acquisition data volumes are only 7M byte.
2., owing to have employed hardware pipeline technology, so do not need to wait for that total data compression is complete, but compression and transmitting synchronous are carried out.
Consult Fig. 3, set forth emphatically the work schedule of binary channels streamline compression unit.
Measure in application in lightning surge, user is only concerned about that the data details in the certain hour of front and back occurs thunder and lightning signal, and therefore, we adopt intelligent compression process, reduce the data that record produces, and improve running efficiency of system.
Specific implementation process is, in gatherer process, when non-transient overvoltage signal occurs, adopts special compression process, and this compression process is a kind of compression process based on hardware-compressed algorithm, and its compressibility is 93% ± 2%; When differentiating generation lightning surge, adopt not compression process, this process can produce a packet with data packet head.These two kinds of processes are intelligent switching at runtime when system cloud gray model, ensure that accuracy and the integrality of key signal, and data volume significantly reduces, and achieves special signal lossless compression.
When compression process changes, two groups of data are spliced by system automatically.
Consult Fig. 4, set forth data packet format emphatically.
No matter be special compression or do not compress, packet is by data packet head and packet composition, and data packet head only contains the start information of packet, and does not comprise the information such as length, bag tail of compressed package, and the afterbody of packet can judge according to agreement.
Consult Fig. 5, when setting forth emphatically compact model transformation, the principle of work of data input.
When not having transient overvoltage signal, last data of shift register will send into special compression process.When transient overvoltage signal being detected, the data in shift register by whole disposable feedings not compression process, to realize negative delay.
Consult Fig. 6, emphasis has set forth the joining method of two transmitting procedures.
When system testing comes then to lightning surge signal, the mode that packed data concatenation unit will be judged by agreement, finds the compressed package tail of special packed data, and waits for the packet header of not packed data, after this two splicing is exported.
Introduce the specific implementation details of special compression module below:
The major design object of this special compression module has:
1, high speed compression.Can accomplish that signals collecting terminates, compression terminates immediately, and its delay can not more than 1ms.
2, UHV (ultra-high voltage) shrinkage.Compressibility reaches more than 90%.
3, namely press and namely read.Flow line flow path, in compression process, data just start transmission.
The design adopts a slice FPGA to complete all logic functions.In FPGA design, have employed the top-down modular design method of FPGA, first the function of top-level module is analyzed, again by its Function Classification refinement, be assigned to different submodules to go to realize, then bottom-up elder generation progressively completes the design of each submodule, finally submodule is interconnected generation top-level module.The mode that method for designing adopts Graphics Input to be combined with hardware description language.
Following table and figure below are top-level module pin instruction cards:
| Pin | Function | Pin | Function |
| clk | Clock signal | reset_n | Reset signal |
| go_bit | Module enable signal | stop_bit | Module stop signal |
| wrclk_in_fifo | Input fifo writes clock | data_in_fifo | 64 input signals |
| Wrreq_in_fifo | Input fifo writes enable | rdclk_out_fifo | Export fifo and read clock |
| rdreq_out_fifo | Exporting fifo reads enable | q_out_fifo | 32 output signals |
| done_bit | Compression end signal | wrfull_in_fifo | The full state of input fifo |
| rdempty_out_fifo | Export fifo dummy status |
Fig. 8 is simulation result schematic diagram:
Packed data only reads when rdempty_out_fifo pulse signal occurs, by when can find out in Fig. 8 that a large amount of data input (data_in_fifo), rdempty_out_fifo pin only has part Decentralized Impulse, proves that compression ratio is very high.In addition, after the conveying of data_in_fifo data, just no longer produce rdempty_out_fifo pulse signal very soon, prove that data acquisition terminates rear compression process and terminates immediately.
Claims (7)
1. a lightning surge signal lossless packed record system, is characterized in that comprising:
Voltage signal acquisition unit: the voltage signal gathering measure field, and the voltage signal collected is converted to the real time data of digital signals format, this digital signal is undertaken storing, covering by shift register;
Superpotential judge module: whether be that transient overvoltage distinguishes to real time data, and according to distinguishing that result selects transmitting procedure; Transmitting procedure comprises special compression process and non-compression process, and these two kinds of transmitting procedures are by transient overvoltage signal arbitration channel selecting;
Compression processing unit: compression process is realized to real time data;
Data concatenation unit: after transmitting procedure changes, the packet of two kinds of processes is spliced, exports final packed data.
2. a kind of lightning surge signal lossless packed record system according to claim 1, it is characterized in that: when being determined as transient overvoltage, real time data adopts not compression process, obtains the not compressed data packets comprising packet header and packet;
When being determined as non-transient overvoltage signal and occurring, special compression process is adopted to real time data, obtain the compressed data packets comprising packet header and packet.
3. a kind of lightning surge signal lossless packed record system according to claim 2, it is characterized in that: data packet head only contains the start information of packet, and not comprising the information such as length, bag tail of compressed package, the afterbody of packet judges according to agreement.
4. a kind of lightning surge signal lossless packed record system according to claim 1, it is characterized in that: when testing lightning surge signal, the mode that data concatenation unit will be judged by agreement, find the bag tail of the compressed data packets after special compression process, and wait for the packet header of not compressed data packets, the two splicing is exported.
5. a kind of lightning surge signal lossless packed record system according to claim 4, is characterized in that: special compression process is the compression process based on hardware-compressed algorithm.
6. a kind of lightning surge signal lossless packed record system according to claim 1, is characterized in that: superpotential judge module, according to the data peaks of real time data, carries out switching at runtime transmitting procedure.
7., according to the arbitrary described a kind of lightning surge signal lossless packed record system of claim 1-6, it is characterized in that: when transient overvoltage signal being detected, the data in shift register by whole disposable feedings not compression process, to realize negative delay.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107807271A (en) * | 2017-09-29 | 2018-03-16 | 中国电力科学研究院 | A kind of method and system for being compressed automatically to over-voltage monitoring data |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2082869U (en) * | 1990-12-27 | 1991-08-14 | 四川省电力工业局试验研究所 | High voltage multifunctional testing instrument |
| US6552524B1 (en) * | 2001-09-20 | 2003-04-22 | Square D Company | High speed power system high voltage transient damage assessment |
| CN1808132A (en) * | 2006-02-09 | 2006-07-26 | 中国电力科学研究院 | Real-time waveform compressing and storing method for recording transient state process of electric power system |
| CN102035200A (en) * | 2009-09-29 | 2011-04-27 | 西门子公司 | Method and device for processing signals |
| CN102169134A (en) * | 2010-12-17 | 2011-08-31 | 中国电力科学研究院 | A hardware-based transient voltage recording method |
| CN102461195A (en) * | 2009-04-28 | 2012-05-16 | 韦尤拜茨印度私人有限公司 | Method and apparatus for splicing a compressed data stream |
| CN103023509A (en) * | 2012-11-14 | 2013-04-03 | 无锡芯响电子科技有限公司 | Hardware LZ77 compression implementation system and implementation method thereof |
| CN202931289U (en) * | 2012-11-14 | 2013-05-08 | 无锡芯响电子科技有限公司 | Hardware LZ 77 compression implement system |
| CN103235241A (en) * | 2013-04-27 | 2013-08-07 | 国家电网公司 | Thunder and lightning electromagnetic wave distribution monitoring device for electric power line |
| CN203259588U (en) * | 2013-05-16 | 2013-10-30 | 广州供电局有限公司 | Lightning overvoltage measuring system |
| CN104202054A (en) * | 2014-09-16 | 2014-12-10 | 东南大学 | Hardware LZMA (Lempel-Ziv-Markov chain-Algorithm) compression system and method |
| CN104483626A (en) * | 2014-12-30 | 2015-04-01 | 成都恒锐智科数字技术有限公司 | Device and system for testing characteristics of transformer on-load tap-changer |
-
2015
- 2015-04-08 CN CN201510160650.7A patent/CN104749429A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2082869U (en) * | 1990-12-27 | 1991-08-14 | 四川省电力工业局试验研究所 | High voltage multifunctional testing instrument |
| US6552524B1 (en) * | 2001-09-20 | 2003-04-22 | Square D Company | High speed power system high voltage transient damage assessment |
| CN1808132A (en) * | 2006-02-09 | 2006-07-26 | 中国电力科学研究院 | Real-time waveform compressing and storing method for recording transient state process of electric power system |
| CN102461195A (en) * | 2009-04-28 | 2012-05-16 | 韦尤拜茨印度私人有限公司 | Method and apparatus for splicing a compressed data stream |
| CN102035200A (en) * | 2009-09-29 | 2011-04-27 | 西门子公司 | Method and device for processing signals |
| CN102169134A (en) * | 2010-12-17 | 2011-08-31 | 中国电力科学研究院 | A hardware-based transient voltage recording method |
| CN103023509A (en) * | 2012-11-14 | 2013-04-03 | 无锡芯响电子科技有限公司 | Hardware LZ77 compression implementation system and implementation method thereof |
| CN202931289U (en) * | 2012-11-14 | 2013-05-08 | 无锡芯响电子科技有限公司 | Hardware LZ 77 compression implement system |
| CN103235241A (en) * | 2013-04-27 | 2013-08-07 | 国家电网公司 | Thunder and lightning electromagnetic wave distribution monitoring device for electric power line |
| CN203259588U (en) * | 2013-05-16 | 2013-10-30 | 广州供电局有限公司 | Lightning overvoltage measuring system |
| CN104202054A (en) * | 2014-09-16 | 2014-12-10 | 东南大学 | Hardware LZMA (Lempel-Ziv-Markov chain-Algorithm) compression system and method |
| CN104483626A (en) * | 2014-12-30 | 2015-04-01 | 成都恒锐智科数字技术有限公司 | Device and system for testing characteristics of transformer on-load tap-changer |
Non-Patent Citations (1)
| Title |
|---|
| 李方泽等编著: "《工程振动测试与分析》", 31 October 1992, 北京：高等教育出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107807271A (en) * | 2017-09-29 | 2018-03-16 | 中国电力科学研究院 | A kind of method and system for being compressed automatically to over-voltage monitoring data |
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