CN107831472A - A kind of method of PPI display pixels mapping echo information - Google Patents

A kind of method of PPI display pixels mapping echo information Download PDF

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Publication number
CN107831472A
CN107831472A CN201710947941.XA CN201710947941A CN107831472A CN 107831472 A CN107831472 A CN 107831472A CN 201710947941 A CN201710947941 A CN 201710947941A CN 107831472 A CN107831472 A CN 107831472A
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mrow
msub
pixel
ppi
display
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CN107831472B (en
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陈斯
林游
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WUHAN BINHU ELECTRONIC CO Ltd
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WUHAN BINHU ELECTRONIC CO Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/04—Display arrangements
    • G01S7/06—Cathode-ray tube displays or other two dimensional or three-dimensional displays
    • G01S7/10—Providing two-dimensional and co-ordinated display of distance and direction
    • G01S7/12—Plan-position indicators, i.e. P.P.I.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

The invention belongs to the content of terminal display field, spy is related to a kind of method of PPI display pixels mapping echo information.The present invention simplifies the mapping relations between echo data and screen pixels, according to PPI display modes and display range, the relation between the mapping relations and display pixel point and distance between display pixel point and orientation is obtained respectively, it is ensured that each display pixel point corresponding range cell.Method orderliness of the invention is clear, operand is small, positive effect, simplifies redundant computation step, is beneficial to implement in engineering.

Description

A kind of method of PPI display pixels mapping echo information
Technical field
The invention belongs to the content of terminal display field, spy is related to a kind of method of PPI display pixels mapping echo information.
Background technology
Plane coordinates position indicator (Plan Position Indicator, PPI), is to sit echo information with right angle Target form output display, but the scan mode based on electric pulse, echo information change for polar form.PPI is shown in When carrying out display renewal, display output need to be carried out to PPI display pictures according to echo-signal and PPI display pixel mapping relations.
Conventional method is when establishing echo information with PPI display pixel mapping relations, by each range cell in each orientation It is respectively mapped in PPI displays on corresponding pixel, multiple range cells easily occurs while be mapped in a pixel PPI In display point, and mapping processing being carried out to each data echo information point, data processing amount is big, system data processing time length, Increasing for current echo information amount, data processing speed easily causes system operation clamping stagnation or even often occurs what is crashed slowly Situation.
For example, with the development of technology, the range resolution ratio and azimuth resolution of radar echo signal are stepping up, thunder The raw radar data amount that Danone receives also increases therewith, and a large amount of Coordinate Conversion fortune need to be carried out when carrying out PPI display renewals The mapping for realizing echo data and pixel is calculated, a large amount of cpu resources is taken, influences treatment effeciency.
On the other hand, PPI shows that the function of required realization becomes increasingly abundant, and can not only adjust display range, while also have There are the multiple display modes such as hollow, eccentric, delay, if the pixel for only mapping to echo data in display, may go out Existing some pixels are without corresponding echo mapping relations, the problem of causing display content to lack.And change show range or During switching display mode, it is required to re-establish mapping relations, consumes plenty of time resource.
The content of the invention
In view of the shortcomings of the prior art, the invention provides a kind of method of PPI display pixels mapping echo information.This hair Mapping relations between bright simplified echo data and screen pixels, according to PPI display modes and display range, display is obtained respectively The relation between mapping relations and display pixel point and distance between pixel and orientation, it is ensured that each display pixel point is equal Corresponding range cell.Method orderliness of the invention is clear, operand is small, positive effect, simplifies redundant computation step, It is beneficial to implement in engineering.
The technical scheme is that：A kind of method of PPI display pixels mapping echo information, it is characterised in that：Comprising Following steps：
Step 1：The pixel point set that need to carry out showing renewal is shown according to PPI display modes and display resolution calculating PPI Conjunction P, pixel point set P=(x, y) | 0≤y ＜ H, (x-x0)2+(y-y0)2≤R2, wherein (x0,y0) be centre point pixel Coordinate, H are the height of PPI display resolutions, and R is PPI display resolution radiuses, and R=H/2, x, y represent to meet to require respectively The abscissa and ordinate of pixel；
Step 2：PPI is shown the pixel point set P that need to show renewal for into pixel-orientation description collections A, gathering A includes multiple subset An, wherein n=Ang(x,y), localizer unit Ang(x,y)=θ(x, y)2 π of ÷ × B, B are localizer unit quantity； θ(x, y)The polar angle of pixel is
Step 3：According to PPI display mode and display range, each distance corresponding to pixel under current state is known Unit number；
Step 4：According to the localizer unit a of echo information, knowing that PPI is shown need to carry out showing renewal to the localizer unit The set of range cell r corresponding to pixelN is each Range cell number corresponding to pixel；R is range cell
Step 5：After terminal software receives echo information, according to the localizer unit information a of echo information, in set UaIn The range cell r corresponding to the pixel coordinate (x, y) and pixel that need to carry out display renewal is found out, due to a pixel pair N number of range cell is answered, therefore the unit scope that need to adjust the distance is compared for the echo information in [r-N/2, r+N/2], chooses echo (x, y) pixel is carried out correspondingly during the maximum or most strong range cell of amplitude is shown with PPI.
The method of echo information is mapped according to PPI display pixels as described above, it is characterised in that：In described step 3, When having M range cell under current display range, then range cell number corresponding to each pixel is N=M/R.
The method of echo information is mapped according to PPI display pixels as described above, it is characterised in that：Described echo information For radar return information or optical signal information.
The beneficial effects of the present invention are：First, establishing a kind of pixel-map relation, calculating operation is not only greatly decreased, together Shi Tigao drawing efficiencies；Second, the present invention shows certain loss of signal be present for radar terminal software PPI, but do not influence to see Survey；Third, the method for the present invention significantly reduces system resources consumption, treatment effeciency is improved, improves system entirety work( Energy；Fourth, for during display range or switching display mode is changed, it is only necessary to which consuming a small amount of time resource can be real It is existing；Five are a cancellation black region, i.e., each area data has renewal, and comparatively method of the invention is shown more It is true to nature.
Brief description of the drawings
The existing PPI display pixels mapping method schematic diagrames of Fig. 1；
Fig. 2 polar coordinate system schematic diagrames；
Fig. 3 obtains display renewal pixel schematic diagram；
Fig. 4 establishes pixel-orientation description collections schematic diagram；
Fig. 5 terminal software PPI display pixels map echo information flow chart；
The original method display effects of Fig. 6；
Fig. 7 the inventive method display effects.
Embodiment
Explanation of nouns：
Polar coordinate system refers to the coordinate system being planar made up of limit, pole axis and polar diameter.As shown in Fig. 2 in the plane Take a fixed point O, referred to as limit.Go out to carry out the coffin upon burial a ray OY, referred to as pole axis from O, then takes a fixed unit length, generally provides angle Degree is taken counterclockwise as just.So, in plane any point P position can with line segment OP length r and from OX to OP Angle, θ determine, be designated as P (r, θ)；R is referred to as the polar diameter of P points, and θ is referred to as the polar angle of P points.
In the present invention, echo information must include range cell and localizer unit, and localizer unit is that echo information is sat in pole Polar angle resolution ratio in mark system, range cell are echo information distinguishable minimum unit in distance in each localizer unit.
In order that technical problems, technical solutions and advantages to be solved are more clearly understood.Tie below Closing accompanying drawing, the present invention will be described in detail by step.
The invention provides a kind of PPI display pixels mapping echo information method, as shown in figure 5, this method include with Lower step：
Step 1：Display renewal need to be carried out as shown in figure 3, calculating PPI according to PPI display modes and display resolution and showing Pixel point set P=(x, y) | 0≤y ＜ H, (x-x0)2+(y-y0)2≤R2, wherein (x0,y0) sat for the pixel of centre point Mark, H are the height of PPI display resolutions, and R is PPI display resolution radiuses, and has R=H/2, and x, y represent to meet to require respectively The abscissa and ordinate of pixel.
We understand that set P is actually by P1To PHCommon H subset composition, and each subset is satisfied by Pn=(x, y) | y =n-1, (x-x0)2+(y-y0)2≤R2, the set of all pixels point as on y=n-1 string.
As shown in figure 3, y=y1When, string X1X2Corresponding pixel wide isCorresponding subset
Step 2：PPI is shown the pixel point set P that need to show renewal for into pixel-orientation description collections A.
As shown in figure 4, to be up to 8192 localizer units under polar coordinate system, OY directions represent 0 °, and polar angle is passed clockwise Example is increased to, the pixel point set P obtained in traversal step 1, the pixel of pixel coordinate (x, y) and the center of circle in set is sat Mark (x0, y0) polar angle of the pixel can be calculated
I.e. residing localizer unit Ang(x,y)=θ(x, y)π × 8192 of ÷ 2, and the pixel coordinate (x, y) is put into set A's Subset AnIt is central, and have n=Ang(x,y).In Fig. 4, in mapping matrix, localizer unit Gi=Ang(x1, y1), Gi=Ang(x2, y2), Gj=Ang(x3, y3), i.e., (x1, y1), (x2, y2) belongs to mapping point set corresponding to same localizer unit, and (x3, y3) belongs to Mapping point set corresponding to another localizer unit.
Understand that set A is by subset A0To A8191Totally 8192 subset compositions, and each subset is satisfied by An=(x, y) | n =Ang(x, y), (x, y) ∈ P }.
Step 3：According to PPI display mode and display range, would know that under current state, corresponding to each pixel away from From unit number.
Exemplified by currently showing and have M range cell under range, then range cell number corresponding to each pixel is N=M/R It is individual.
Step 4：The information obtained according to step 2 and step 3, PPI can be known according to the localizer unit a of echo information Showing need to carry out showing the set of the range cell r corresponding to the pixel of renewal to the localizer unitEstablish a kind of localizer unit, range cell and screen Mapping relations between pixel.
Step 5：After terminal software receives echo information, according to the localizer unit information a of echo information, in set UaIn The range cell r corresponding to the pixel coordinate (x, y) and pixel that need to carry out display renewal is found out, due to a pixel pair N number of range cell is answered, therefore the unit scope that need to adjust the distance is compared for the echo information in [r-N/2, r+N/2], chooses echo (x, y) pixel carries out display renewal during the maximum or most strong range cell of amplitude is shown with PPI.
This method establishes a kind of pixel-map by way of PPI display pixels are mapped into echo data azran Relation, calculating operation is not only greatly decreased, while improves drawing efficiency.The present invention method know in certain radar by test, Whole mapping process has a large amount of echo data azrans to be mapped without corresponding pixel, but due between adjacent orientation data frame In the presence of certain similitude, while the echo corresponding to general flight path target has larger orientation span, therefore the present invention is used for Radar terminal software PPI, which is shown, has certain loss of signal, but does not influence to observe.But the method for the present invention significantly reduces System resources consumption, treatment effeciency is improved, improve system allomeric function.Show that range or switching are aobvious simultaneously in change During showing mode, it is only necessary to consume a small amount of time resource and can be achieved.
From Fig. 6 and Fig. 7 real effects, shown in the range of 300km, existing method, which is shown, has black region Domain, the i.e. area data do not update, and after using this method, black region is eliminated, i.e., each area data has more Newly, comparatively of the invention method shown it is more true to nature.
The echo information of the present invention can be radar return information, optical signal information, as need the rectangular of collection Shape information is converted into the information of circular display, and the situation of reflective information information content is less than particularly suitable for circular display pixel.This The range cell of invention is one kind of reflective information information content.

Claims (3)

  1. A kind of 1. method of PPI display pixels mapping echo information, it is characterised in that：Comprise the steps of：
    Step 1：The pixel point set P that need to carry out showing renewal is shown according to PPI display modes and display resolution calculating PPI, Pixel point set P=(x, y) | 0≤y ＜ H, (x-x0)2+(y-y0)2≤R2, wherein (x0,y0) be centre point pixel coordinate, H is the height of PPI display resolutions, and R is PPI display resolution radiuses, and R=H/2, x, y represent that satisfaction requires pixel respectively The abscissa and ordinate of point；
    Step 2：PPI, which is shown, need to show the pixel point set P of renewal for into pixel-orientation description collections A, set A bags Include multiple subset An, wherein n=Ang(x,y), localizer unit Ang(x,y)=θ(x, y)2 π of ÷ × B, B are localizer unit quantity；θ(x, y) The polar angle of pixel is
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    Step 3：According to PPI display mode and display range, each range cell corresponding to pixel under current state is known Number；
    Step 4：According to the localizer unit a of echo information, know that PPI shows the pixel that need to carry out showing renewal to the localizer unit Corresponding range cell r setN is each pixel Corresponding range cell number；R is range cell
    Step 5：After terminal software receives echo information, according to the localizer unit information a of echo information, in set UaIn find out The range cell r corresponding to the pixel coordinate (x, y) and pixel of renewal need to be carried out showing, because a pixel corresponds to N Individual range cell, therefore the unit scope that need to adjust the distance is compared for the echo information in [r-N/2, r+N/2], chooses echo amplitude (x, y) pixel is carried out correspondingly during maximum or most strong range cell is shown with PPI.
  2. 2. the method for PPI display pixels mapping echo information according to claim 1, it is characterised in that：Described step 3 In, it is current to show that then range cell number corresponding to each pixel is N=M/R when having M range cell under range.
  3. 3. the method for PPI display pixels mapping echo information according to claim 1, it is characterised in that：Described echo Information is radar return information or optical signal information.
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Cited By (4)

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CN106908772A (en) * 2017-03-06 2017-06-30 中国人民解放军海军航空工程学院青岛校区 The method that regional area signal is extracted from radar echo signal
CN110940978A (en) * 2019-12-09 2020-03-31 上海眼控科技股份有限公司 Radar PPI image display method and device, electronic equipment and storage medium
CN111537991A (en) * 2020-05-20 2020-08-14 北京无线电测量研究所 Processing method for displaying target containing azimuth information in radar view
CN111551930A (en) * 2020-05-18 2020-08-18 南京众博达电子科技有限公司 Radar image display method based on layered display

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106908772A (en) * 2017-03-06 2017-06-30 中国人民解放军海军航空工程学院青岛校区 The method that regional area signal is extracted from radar echo signal
CN106908772B (en) * 2017-03-06 2019-04-09 中国人民解放军海军航空工程学院青岛校区 The method of regional area signal is extracted from radar echo signal
CN110940978A (en) * 2019-12-09 2020-03-31 上海眼控科技股份有限公司 Radar PPI image display method and device, electronic equipment and storage medium
CN111551930A (en) * 2020-05-18 2020-08-18 南京众博达电子科技有限公司 Radar image display method based on layered display
CN111551930B (en) * 2020-05-18 2022-03-18 南京众博达电子科技有限公司 Radar image display method based on layered display
CN111537991A (en) * 2020-05-20 2020-08-14 北京无线电测量研究所 Processing method for displaying target containing azimuth information in radar view
CN111537991B (en) * 2020-05-20 2022-07-15 北京无线电测量研究所 Processing method for displaying target containing azimuth information in radar view

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