CN101018339A - Full radar video compound technology - Google Patents
Full radar video compound technology Download PDFInfo
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- CN101018339A CN101018339A CN 200610018329 CN200610018329A CN101018339A CN 101018339 A CN101018339 A CN 101018339A CN 200610018329 CN200610018329 CN 200610018329 CN 200610018329 A CN200610018329 A CN 200610018329A CN 101018339 A CN101018339 A CN 101018339A
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Abstract
The full-radar video combining technology combines all need radar information together and records or allocates with only one video or coaxial cable. The advantages of this invention comprises: use TV video device and allocation device conveniently to synchronous record and allocate analog video and all distance/angle information, reduces cable number and allocation complexity, and improves system reliability.
Description
Technical field
The present invention relates to full radar video signal record and distribution technique field, specifically a kind of full radar video compound technology.
Background technology
The full radar video signal comprise radar simulation amount video and distance, angle synchronizing information (apart from trigger impulse, azimuth coding, orientation squeeze into pulse, orientation quenching pulse, bearing increment pulse, rotating control level, elevation angle coding, pulse, other state informations etc. are squeezed in the elevation angle), to use many group cables or channel that one group of full radar video signal is write down usually or distribute.Under the few situation of the radar information quantity of needs, generally be exactly to utilize the radar video distributor, the mode that adopts analog quantity video and distance, angle synchronizing information to distribute respectively.But in large-scale system, often need multipath radar information, if adopt traditional mode to distribute, system's cable amount is many, method of salary distribution complexity.If will use television video recording equipment record full radar video signal, except radar video signal, must reduce the angle synchronizing information, only keep the few bearing increment information of amount of information, the video, the voice-grade channel that record the television video recording equipment after the processing respectively get on.
Summary of the invention
Invent technical problem to be solved:
The television video, the row field synchronization information that are similar in the composite video signal are synthetic the same, with the analog quantity video and apart from trigger impulse, azimuth coding, orientation squeeze into pulse, orientation quenching pulse, bearing increment pulse, rotating control level, elevation angle coding, that pulse, other states etc. are squeezed in the elevation angle is information combined, only adopt one tunnel video channel or a coaxial cable to write down or distribution, reduce that radar information write down in combat system or the complexity of distributing in, assurance is write down or is distributed whole radar informations.
The technical scheme that adopts:
The conventional allocation method is that radar simulation amount video uses one tunnel video channel (as a coaxial cable), other digital quantity synchronizing information to adopt the mode of the digital channel (as many groups twisted-pair feeder) of standard to distribute, sometimes in order to reduce number of channels, the digital quantity synchronizing information is reduced, as select apart from trigger impulse, orientation quenching pulse, bearing increment pulse as basic synchronizing information, squeeze into pulse, elevation angle coding, the elevation angle and squeeze into pulse etc. and cast out the bigger azimuth coding of data volume, orientation.If will use television video recording equipment record full radar video signal, except radar video signal, only keep apart from trigger impulse and bearing increment information, the video, the voice-grade channel that record the television video recording equipment after the processing respectively get on.
The core of full radar video compound technology is exactly that the radar information that all are required is combined with each other, and only adopts one tunnel video channel or coaxial cable to write down or distributes.The scheme that realizes is:
With radar simulation slowed-down video 64uS, get after the delay apart from trigger impulse t1 to the Δ t between the t1-Δ t, as the flyback of radar simulation video.With azimuth coding, orientation squeeze into pulse, orientation quenching pulse, bearing increment pulse, rotating control level, elevation angle coding, the elevation angle is squeezed into unifications such as pulse, other state informations and is processed into one group of two-value serial code.To be processed into one group of negative pulse apart from trigger impulse, comprise t1-Δ t distance guiding pulse constantly and t1 constantly apart from trigger impulse.Positive polarity two-value serial code and one group of negative pulse add in the flyback t of the radar video after the time-delay simultaneously, add the television line field sync signal of negative polarity, so far finished analog video and synchronous digital is information combined, formed full radar composite video, its waveform is seen Fig. 1, and the detail section of flyback is seen Fig. 2.After composite video is read or is distributed, take corresponding recovery measure, therefrom isolate radar simulation amount video and distance, angle synchronizing information (apart from trigger impulse, azimuth coding, orientation squeeze into pulse, orientation quenching pulse, bearing increment pulse, rotating control level, elevation angle coding, pulse, other state informations are squeezed in the elevation angle), remove the television line field sync signal.
The advantage of full radar video compound technology of the present invention is:
After taking full radar video compound technology, can utilize television video recording equipment and television video distributing equipment synchronously to write down easily and distribute radar simulation amount video and all apart from, angle synchronizing information.Solved can't on general television video recording equipment, write down whole radar simulation amount videos and the distance, the angle synchronizing information problem; Many group radar informations are divided timing, because coaxial cable can carry radar simulation amount video and all apart from, angle synchronizing information, the number of cables minimizing of system greatly reduces the complexity of distribution, can utilize the television video distributing equipment to distribute full radar video, improve reliability.System scale is big more, and effect is obvious more.
Description of drawings
Fig. 1 full radar video composite wave-shape (complete distance triggers the cycle).
Fig. 2 full radar video composite wave-shape part-distance, angle synchronizing information composite wave-shape.
Fig. 3 full radar video composite principle block diagram.
Fig. 4 composite radar video separation theory diagram.
Embodiment
According to shown in Figure 1, in general television video record and distribution system, line synchronizing signal has also played direct current clamp and the indispensable information of restore circuit in AGC control and equipment and the module except being the lock-out pulse of television video frequency signal.Field sync signal is then essential in the videograph process, and reason is that the synchronizing information of television video video tape recorder rotating magnet head is taken from field sync signal.
Therefore, in the radar composite signal, what at first will comprise is to be the horizontal synchronizing pulse of 64 μ s in the cycle, also will take into account the field system chronizing impulse that the consideration cycle is 20ms, also will comprise the back porch blanking pulse simultaneously.
According to shown in Figure 2, for dissimilar radars, the distance by radar lock-out pulse is a pulse that repetition rate is indefinite, width differs, so if it is sneaked in the TV synchronousing signal, then be difficult to it is separated.In order to guarantee not lost apart from trigger impulse, earlier the distance by radar trigger impulse is handled with before row, field sync signal are mixed, conversion, form and mix with horizontal synchronizing pulse apart from guiding, trigger impulse.If during no distance by radar lock-out pulse, comprise row, field sync signal in the synchronizing information, in distance by radar guiding, range pulse arrive, reach for row, the field system chronizing impulse that may occur at that time with it.The result who does like this is that row, field sync signal are not lost, and distance by radar is guided, pulse also is compound among the TV synchronousing signal.
Orientation, elevation information and other information for will be compound mix it and radar video signal.But when separating, lean on time and amplitude to differentiate.In a period of time before the next one is apart from lock-out pulse, radar video (being echo) has one section so-called flyback on time shaft, the orientation sign indicating number can be recorded in this zone.In scheme,, be carved into the flyback of t1-Δ t time constantly during the distance by radar trigger impulse t1 of intercepting time-delay back as radar video to the fixed delay that the radar video signal and the distance by radar trigger impulse of various different radar repetition rates carries out 64uS.Information such as the elevation angle, orientation are by t1-Δ t distance guiding pulse enable constantly, be inserted into before the t1 distance by radar trigger impulse constantly after the delay, among the flyback of the radar video signal after promptly postponing, adopt digital delay line to carry out delay technology, can realize the DDEL of radar video signal.
This programme adopts the orientation full dose information combined, and the compound of azimuth information can be determined figure place according to desired resolution, if azimuth resolution requires 4096/360 °, then the orientation is compound should be 12, by shift register, it is become 12 long serial code.Simultaneously, consider three-dimensional radar, elevation angle sign indicating number also with orientation sign indicating number Unified coding, the length of elevation angle sign indicating number is 10.
In recombination process, coding is the synchronous serial sign indicating number, consider video bandwidth, and code check will be controlled within the specific limits, and the standard bandwidth of television video is 6MHZ, and this programme fixes on 2MHZ with the fundamental frequency of code check.Complex method is the mode of amplitude modulation sign indicating number.Compound mode and form are seen figure.Also can consider the compound scheme of width modulated and the fundamental frequency of 1MHZ.
Add the RL return loss problem that causes in order to solve line synchronizing signal, utilize the radar video digital delaying circuit, echo before postponing is detected, when discovery has on the wide position of a continuous horizontal blanking no echo, write down this moment, this on the echo channel after the delay adds constantly enters a profession and horizontal blanking signal.If (64 μ s) has echo continuously or do not have echo in a line period always, then last one-period synchronization add and enter a profession and horizontal blanking signal.Generally at this moment, echo all is land, island or strong jamming continuously.On cleaner sea, adopt this mode, line synchronizing signal is basically to not influence of echo.So both can solve the insertion problem of composite video signal, can guarantee again the influence of TV synchronousing signal to echo reduced as far as possible.
According to shown in Figure 3, full radar video recombiner basic procedure is as described below:
The various synchronizing signals of radar directly enter the FPGA circuit by input buffer, and radar video signal at first will be through can adjusting limiting amplifier, and the radar video of various different amplitudes is unified into the normal video amplitude, and then through active filter.Active filter is the low pass filter of 8M, is unlikely to produce mixed repeatedly effect with the A/D converter that guarantees the 16M clock.Enter digital delay line among the FPGA through the digital video signal after the A/D conversion, in digital delay line, the digital signal processor of being made up of RAM (DSP) is to a time T of digital video signal delay (64uS).Meanwhile, also will the digital echo in the 64uS before postponing be detected, when finding to have on the wide position of a continuous horizontal blanking no echo, this on the digital echo passage after the delay adds constantly enters a profession and horizontal blanking signal.If (64 μ s) has echo continuously or do not have echo in a line period always, then last one-period synchronization add and enter a profession and horizontal blanking signal.Delay line and testing circuit will be subjected to the synchronous of distance by radar triggering.
In FPGA, also has a timing sequencer of forming by ROM, it is started by the distance by radar trigger impulse of FPGA input, in order to produce distance guiding pulse, distance by radar trigger impulse after postponing and and orientation, elevation angle coding, distance guiding pulse and postpone after the distance by radar trigger impulse mix the formation TV synchronousing signal with row, field sync signal.Unified orientation, the parallel sign indicating number in the elevation angle of becoming of the parallel sign indicating number in bearing increment, Zheng Bei, orientation, the parallel sign indicating number in the elevation angle by the FPGA input, pass through timing sequencer, form 12 orientation of serial, 10 elevations angle and 2 other codings, again with postpone after the digital radar video signal mixture.Digital radar video before mixing will be by distance by radar lock-out pulse and the blanking of horizontal blanking signal institute.At last, all digital video signals handled and synchronizing signal form compound full radar video signal and are exported by FPGA after mixing.
Compound full radar video signal is finally by the D/A converter, become analog current signal, by a current/voltage converter, form the composite radar vision signal of simulation then, its amplitude can be determined by the parameter of adjusting a current/voltage converter.If add 75 Ω loads, its peak-to-peak value is 1V, and the ratio of video and negative polarity lock-out pulse satisfies the requirement of television video.
According to shown in Figure 4, it is as described below that compound full radar video separates basic procedure:
Row field sync signal and distance guiding, trigger impulse be by special-purpose synchronizing separator circuit, will go field sync signal and distance guiding, trigger impulse to separate.The composite video signal of recovering through direct current is sent into the orientation elevation information treatment channel among the EPLD, synchronizing separator circuit separate composite synchronizing signal send among the EPLD apart from the trigger impulse split tunnel.
In orientation elevation information treatment channel, the separation of the information such as the elevation angle, various appended synchronization signal enabling orientation that provide apart from the trigger impulse separator is provided, the information separated such as the elevation angle, orientation in the composite video signal are come out.Orientation of separating and elevation angle serial code are at first passed through the outer amplitude discriminator of EPLD, form the lock-out pulse and 24 Bits Serial Code of serial, the elevation angle, the orientation decoder that enters again among the EPLD becomes 12 parallel-by-bit orientation sign indicating numbers, 10 parallel sign indicating numbers in the elevation angle and 2 other codes with it.Composite synchronizing signal enters apart from behind the trigger impulse split circuit, goes out apart from trigger impulse the filtering TV synchronousing signal by distance guiding pulse separation.
Because in record and the transmission assigning process, orientation, elevation information can be subjected to from the influence of each side and impaired.A hardware digital signal processor is set in the composite radar video separator, this processor basis is turning to and speed of antenna at that time, judge the credibility of the orientation of extracting and elevation information, rejecting is judged to underproof orientation elevation information, provide pre-interception elevation angle sign indicating number simultaneously, replace this stack orientations elevation angle sign indicating number, guarantee the continuity and the correctness of orientation elevation information.The antenna bearingt elevation information of handling provides the parallel sign indicating number in the elevation angle, orientation through an orientation and elevation signals generator, squeezes into pulse and bearing increment pulse, orientation quenching pulse etc.
Radar video at first passes through DC restoration circuit, removes various synchronizing signals.By the requirement of system, by the radar video signal of output circuit output nominal to video amplitude, impedance.In order to reject azimuth information, the azimuth information that adds in return period is carried out blanking, guaranteeing does not have other information except radar video (echo) in the signal of output.
Claims (2)
1, a kind of full radar video compound technology is characterized in that: the radar information that all are required is combined with each other, and only adopts one tunnel video channel or coaxial cable to write down or distributes.
2, full radar video compound technology according to claim 1 is characterized in that: with radar simulation slowed-down video 64uS, get after the delay apart from trigger impulse t1 to the Δ t between the t1-Δ t, as the flyback of radar simulation video.With azimuth coding, pulse is squeezed in the orientation, the orientation quenching pulse, the bearing increment pulse, the rotating control level, elevation angle coding, pulse is squeezed at the elevation angle, unifications such as other state informations are processed into one group of two-value serial code, to be processed into one group of negative pulse apart from trigger impulse, comprise t1-Δ t constantly distance guiding pulse and t1 constantly apart from trigger impulse, positive polarity two-value serial code and one group of negative pulse add in the flyback t of the radar video after the time-delay simultaneously, add the television line field sync signal of negative polarity, so far finish analog video and synchronous digital is information combined, formed full radar composite video.
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| CNB2006100183296A CN100464589C (en) | 2006-02-07 | 2006-02-07 | Full radar video compound technology |
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| CNB2006100183296A CN100464589C (en) | 2006-02-07 | 2006-02-07 | Full radar video compound technology |
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| CN101018339A true CN101018339A (en) | 2007-08-15 |
| CN100464589C CN100464589C (en) | 2009-02-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101369013B (en) * | 2008-09-11 | 2012-01-11 | 广州中南民航空管技术装备工程有限公司 | Method and system for amalgamation display of weather radar and navigation management radar information |
| CN102411552A (en) * | 2011-12-26 | 2012-04-11 | 南京鹏力系统工程研究所 | Method and system for transmitting radar signal in shipping traffic navigation system |
| CN102780854A (en) * | 2012-07-30 | 2012-11-14 | 中国船舶重工集团公司第七0九研究所 | Method for controlling centralized comprehensive video distribution based on dual-net complementary set |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0527014A (en) * | 1991-07-19 | 1993-02-05 | Mitsubishi Electric Corp | Radar device |
| JP2000065916A (en) * | 1998-08-25 | 2000-03-03 | Japan Radio Co Ltd | Radar signal processor |
| CN2458823Y (en) * | 2000-12-29 | 2001-11-07 | 李植棠 | Analog optical fibre transmission apparatus for microwave antenna receiving signal |
| CN1148067C (en) * | 2001-06-01 | 2004-04-28 | 中国科学院计算技术研究所 | Data compressing method for complex image of synthetic apertre radar |
| CN1261770C (en) * | 2002-10-16 | 2006-06-28 | 西安交通大学 | Radar video frequency data real time compression and decompression transmission method |
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2006
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101369013B (en) * | 2008-09-11 | 2012-01-11 | 广州中南民航空管技术装备工程有限公司 | Method and system for amalgamation display of weather radar and navigation management radar information |
| CN102411552A (en) * | 2011-12-26 | 2012-04-11 | 南京鹏力系统工程研究所 | Method and system for transmitting radar signal in shipping traffic navigation system |
| CN102780854A (en) * | 2012-07-30 | 2012-11-14 | 中国船舶重工集团公司第七0九研究所 | Method for controlling centralized comprehensive video distribution based on dual-net complementary set |
| CN102780854B (en) * | 2012-07-30 | 2015-06-24 | 中国船舶重工集团公司第七0九研究所 | Method for controlling centralized comprehensive video distribution based on dual-net complementary set |
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| CN100464589C (en) | 2009-02-25 |
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