RU81342U1 - VIDEO AND GRAPHIC INFORMATION BLOCK - Google Patents

Abstract

The utility model relates to computer technology and can be used to display analog radar information from radar stations and mobile radio altimeters on a rectangular raster scan monitor.

The technical result consists in combining and simultaneously displaying analog and graphic information on one monitor, which improves the automated workplace of the operator of the radar information processing post.

The technical result is achieved by the fact that the radar bus interface unit, the scaling unit, the coordinate system converter unit, the memory arbiter, the display memory unit are allocated to a separate channel for preparing the radar data for display, duplicated by a second channel of the same composition and an additional radar selector block is added to each channel in azimuth and range, the radar detector selector block, the afterglow control unit, and then the display control block are introduced into the two channels for preparing the radar data for display, a background image forming unit, a coordinate system converter unit, a graphic primitives memory unit, a monitor interface signal generating unit.

Description

The utility model relates to computing and can be used to display analog information from radar stations and radar altimeters (PRV) on a rectangular raster scan monitor.

A device for the combined display of radar and sign information (Trusilov V. The device for the combined display of radar and sign information / V. Trusilov, V. Sharov, V. Maidanik, M. Sedov // Modern automation technology. -1998. - No. 1. - with .88-90.) Containing the interface of the radar line, the interface of the host processor, the radar processor, the image buffer, the video multiplexer, the radar buffer, a digital signal processor, a digital-to-analog converter.

The disadvantages of this device are:

- the ability to use only if you have a computer with an expansion interface;

- high demands on the speed of the central computer processor.

The closest analogue (prototype) of the claimed device is a video adapter for the radar situation (patent for utility model RU No. 33655, application 2003117183 dated June 11, 2003, IPC: 7 G01S 7/12, published October 27, 2003, bulletin No. 30, part 3) containing a radar bus interface unit, a system interface unit, the input of which is connected to the computer system bus, an image memory unit, a digital-to-analog video signal converter, a coordinate system converter, a memory arbiter, a scaling unit, a pixel frequency generator, regeneration, the input and output unit monitor interface.

The disadvantages of the prototype are:

- the possibility of use only in the presence of an electronic computer with a monitor bus;

- display of analogue radar information (RLI) from two antenna radars, display of analogue radar information from two radars simultaneously or from radar and PRV on one monitor, together with graphic information, it is possible only by cascading devices;

- the impossibility of selecting an analogue radar image display (inconvenience when working with drop-down windows and forms);

- new information is entered without taking into account the stored information, so it is impossible to track the history of analogue radar data.

The technical task of the proposed utility model is to improve the automated workplace of the operator of the radar processing station.

The problem is solved by creating the proposed utility model, which along with the parameters of the prototype has the following tactical and technical data:

- Autonomous operation is provided (without an input monitor interface);

- reduced requirements for the computer (no video card required);

- the combination and simultaneous display of the analogue radar from two antenna radars, the display of the analogue radar simultaneously from two radars or from the radar and PRV on one monitor, together with graphic information;

- selection of the displayed analogue radar image was provided (forms with coordinates in azimuth and range separately for each channel were introduced);

- Improved work with drop-down windows and forms (additional blanks per frame with horizontal and vertical coordinates have been introduced);

- information storage is provided for less and more than one revolution of the radar antenna (information is stored in the memory taking into account the stored information and stored taking into account the afterglow parameters);

- threshold levels and brightness adjustment for displaying analogue echo signals, active response signals, general recognition signals, bearing signals were introduced;

- information can be displayed with inversion - an echo signal with adjustable brightness is displayed on a dark background (positive) or on a light background (negative).

The known unit for combining video and graphic information (BSVGI) contains a radar bus interface unit, a scaling unit, the output group of which is connected to the coordinate system converter unit, a memory arbiter, a display memory unit, a digital radar control and reception command unit, the input group of which is connected to the system computer bus, three-channel digital-to-analog video signal converter, output unit of the monitor interface, the output of which forms the output bus of the monitor interface.

To achieve the technical result, the radar bus interface unit, the scaling unit, the coordinate system converter unit, the memory arbiter, and the display memory block are allocated to a separate channel for preparing the radar data for display, duplicated by a second channel of similar composition and an additional radar selector block is added to each channel azimuth and range, the input group of which is connected to the radar bus interface unit, the first group of outputs is connected to the scaling unit, the second group the outputs are connected to the coordinate system converter unit, the radar detector selector block for the frame, the input group of which is connected to the coordinate system converter unit, the output group is connected to the memory arbiter, the afterglow control unit, whose first input / output group is connected to the memory arbiter, and the input group -exit of each additional

the input unit is connected to the local control and data exchange bus, and then a display control unit, the first and second group of inputs of which is connected to the afterglow control unit of the first and second channels, respectively, is introduced into the two channels for preparing the radar data for display, the group of inputs and outputs is connected to the local control and data exchange bus, and the output is connected to a three-channel digital-to-analog video signal converter, a background image forming unit, a coordinate system converter unit, bl to the memory of graphic primitives, a monitor interface signal generation unit, the input group of which is the input interface of the monitor interface, the input-output group is connected to the local control and data exchange bus, the first group of outputs is connected to the afterglow control units and the radar selector units according to the frames of the first and second channels for preparing radar data for display, and the second group of outputs is connected to the output unit of the monitor interface, the first and second group of inputs and outputs of the background image forming unit connected to the coordinate system converter unit and to the graphic primitives memory block, respectively, the third group of inputs and outputs is connected to the local control and data exchange bus, the fourth group of inputs and outputs is connected to the signal conditioning unit of the monitor interface, the group of outputs is connected to the output unit of the monitor interface .

The proposed utility model is presented in the drawing in the form of a structural diagram.

The unit for combining video and graphic information (Fig.) Consists of the first and second channels for preparing an analogue radar image for display and contains: a bus for radar information from radar station 1, a system bus 2, an input bus for the monitor interface 3, an output bus for the monitor interface 4, local control and data exchange bus 5, radar bus interface unit 6, radar selector unit in azimuth and distance 7, coordinate system converter unit 8, block

scaling 9, radar detector selector block 10, memory arbiter 11, display memory block 12, afterglow control unit 13, digital radar sensor control and reception unit 14, display control unit 15, three-channel digital-to-analog video signal converter 16, interface signal generating unit monitor 17, a unit for generating a background image 18, a memory unit for graphic primitives 19, an output unit for the interface of the monitor 20.

The radar information bus 1 is designed to receive a group signal containing information about the launch pulse, the position code of the radar antenna (in the horizontal plane) or the PRV (in the horizontal and vertical planes), the amplitude codes of the analog echo signals, active response signals, general recognition, bearing , individual identification and indication signals of the radar / PRV modes.

The computer system bus 2 is designed to receive digital radar data (a graphic primitive code with the coordinates of the display zone is transmitted), commands to control the display modes from the host computer or controller, and transmit the status of the display device to the host computer or controller.

The input bus of the monitor 3 interface connects the BSVGI input to the output of the computer graphic adapter. The mode is used to combine analogue radar data with graphic information of a computer complex. Bus 3 has a standard set of circuits, including: frame and lowercase clock signals, analog components of R, G, B computer images (secondary information), it does not contain pixel frequency circuits.

The output bus of the monitor 4 interface, standard in circuit composition and exchange discipline, is intended for data exchange between the BSVGI and the monitor (for example, SVGA).

The local control and data exchange bus 5 provides transmission of control commands and reception of information about the state of the blocks.

The radar bus interface unit 6 is intended for receiving signals from bus 1 and decoding a group analogue radar in a form convenient for processing.

The azimuth and range 7 radar detector selector block is designed to prohibit the display of radar information in a given range of coordinates in azimuth and distance, set the display threshold and amplify echo signals, set the display brightness of active response signals and general recognition. The azimuth and range 7 radar detector selector block is also used to cut off jamming directions, specify responsibility sectors, and to set one of the display modes of an analog radar from radars with different scales of operation. If the analogue radar of one of the radars is displayed in the near field, then the analog radar of the second radar is displayed in the far zone. It is possible to install up to six azimuthal forms and up to two radial forms in range per channel.

The coordinate system converter unit 8 together with the scaling unit 9 provides the coordinate conversion from the polar system to the Cartesian system and the preparation of the radar image with a given center and scale in a given window of the air situation.

The radar detector selector block for frame 10 provides blanking of display areas for pop-up menus, tips or forms.

The memory arbiter 11 is designed to provide read and write access to a shared memory resource.

The display memory unit 12 is designed to store radar data from analog stations depending on the parameters set in the afterglow control unit 13.

The afterglow control unit 13 reduces the value of the brightness code of the radar display by the value i through j frames.

The block of control commands and reception of digital RRL 14 provides pairing with a standard data exchange line of the control computer or controller and the organization of the local bus 5.

The display control unit 15 provides a choice of a color palette and a way of displaying radar images taking into account the standing point of the radar stations.

The three-channel digital-to-analog video signal converter 16 is intended for generating color analog signals of a monitor interface for displaying an analogue radar image.

The signal generation block of the monitor interface 17 determines the presence of input frame and line sync pulses of the monitor interface and, if absent, forms its own frame and line sync pulses with a preset resolution. By default, a mode with a resolution of 1204x768 pixels and a frame rate of 60 Hz is set.

The background image forming unit 18, together with the memory unit of the graphic primitives 19 and the coordinate system converter unit 8, provides the display of the digital radar image received from the control and reception unit of the digital radar image 14.

The output unit of the monitor interface 20 is designed to integrate the same color analog signals coming from the background imaging unit 18 and the three-channel digital-to-analog converter 16 and outputs the result to the output bus 4 of the monitor interface. When displaying radar data in positive - summation of signals, when displaying radar data in negative - multiplication or subtraction.

Let us consider the operation of the unit for combining video and graphic information with the example of one of the channels for preparing an analogue radar image for display, since the operation of the channels is identical.

Group radar information on the radar information bus 1 is fed to the interface module of the radar bus 6, which provides decoding and allocation of the azimuthal code of the radar antenna or codes of the elevation position of the PRV antenna, the coordinate amplitude data

echo signal, determines the presence of active response signals, general recognition, bearing and information transfer to the radar selector unit in azimuth and range 7.

The azimuth and range 7 radar detector selector block provides radar radar blanking in the polar coordinate system, adjusts the brightness of the display of coordinate echo signals, sets the values in the range from 0 to 255 corresponding to the brightness of the display of data signals to monitor screen. It also allows you to set a threshold for the noise component and integrates the codes of coordinate echo signals, active response signals and general recognition.

The complex code of coordinate echo - signals, active response signals and general recognition from the output of the radar selector block in azimuth and range 7 goes to the scaling unit 9, which determines the frequency and magnitude of the coordinate conversion steps for the coordinate system transformer 8.

The code of the azimuthal position of the radar antenna or the code of the elevation position of the PRV antenna, depending on the operating mode, is supplied to the coordinate system conversion unit 8, which provides the conversion of the coordinates of the coordinate echo signal from the polar to the Cartesian system.

The RLI code after the block of the coordinate system converter 8 is sent to the RLI selector block on frame 10, which prohibits the display of radar data in forms with coordinates specified in the command registers.

Next, the RRL code is sent to the memory arbiter 11, which provides a record of new information, taking into account the previously stored information. The radar amplitude code is recorded, the value of which exceeds the value of the stored information.

To reduce performance requirements, the memory is organized from several random access memory chips with integrated

address lines. Thus, reading and writing is carried out simultaneously of several words corresponding to the same number of pixels.

In addition, the afterglow control unit 13, together with the memory arbiter 11, reduces the stored information code value by i through j frames, thereby simulating the afterglow effect.

The memory arbiter 11 organizes the four-stroke operation of the display memory block 12. In the first clock cycle, the values of the memory words are read at the address corresponding to the current pixels, in the second clock, the values are written taking into account the parameters i and j at the same address.

In this case, the averaged over j value of the afterglow parameter t is calculated by the following formula:

t = 255j / (i × f);

where: t is the afterglow parameter value in seconds;

255 - the maximum value that the code of the amplitude of the echo signal can take;

j is a number indicating the number of frames cyclically subtracting the value of i;

i is the number subtracted from the stored information code for one frame;

f- frame rate in Hz.

Parameters j and i can take values in the range from 0 to 255, when setting j = l and i = 255, the display memory block 12 is cleaned (zeroed) in one frame, when set to i = 0, information is stored regardless of j setting a different value i.

The weakening trace from the echo - signal will be displayed on the screen of the video monitor over time:

t = A _ec × j / (i × f);

where: And _es is the code of the amplitude of the echo signal.

For example, at A _es = 255, j = 1, i = 1, f = 60 Hz, a weakening trace of the echo signal can be observed over time:

t = 255 × 1 / (1 × 60) = 4.25 seconds.

In the third step, data is read at the address that corresponds to the address of the new radar data, data is compared and in the fourth step, if the value of the new data is greater, new data is recorded at the same address.

Another organization of the work of the arbiter of memory is possible. For example, recording in reverse scan by line and / or frame. In this case, it is necessary to buffer the input data for the time period of the forward scanning stroke per line and / or frame, which will reduce the exchange rate with memory by half.

From the outputs of the afterglow control units 13 of the first and second channels, the radar image is transmitted to the display control unit 15, which provides the complexation of the radar data of the first and second channels and determines the color palette of the information displayed on the screen of the video monitor and, if necessary, allows you to invert the data, thereby providing a radar image in negative .

The integrated data is fed to a three-channel digital-to-analog converter 16, from the output of which analog signals are fed to the output unit of the monitor interface 20.

The signal generation unit of the monitor interface 17 provides the detection of external frame and line sync pulses and, in the absence, forms its own. The output frame and horizontal sync pulses are fed to the radar selector block by frame 10 and the background image generation block 18, in addition, the frame sync pulses are fed to the afterglow control unit 13 ..

The background image forming unit 18 together with the memory unit of graphic primitives 19 and the coordinate system converter unit 8 provides the formation of a coordinate grid in polar or Cartesian

system and the preparation of digital radar, coming from the computer system bus 2, through the control unit and receiving digital radar 14, for display.

The output unit of the monitor interface 20 provides a combination of analog signals from the three-channel digital-to-analog converter 16 and the background image forming unit 18 or analog signals coming from the input bus of the monitor 3 interface (from the video output of the computer) through the signal generating unit of the monitor interface 17 and generates a set of signals with the required parameters of the output bus of the monitor interface 4.

The proposed technical solution allowed us to improve the automated workplace of the operator of the radar processing station by improving the tactical and technical data and operational characteristics. The use of BSVGI is possible in automated air traffic control systems and in radar processing stations.

Information sources:

1. Trusilov V. The device for combined display of radar and sign information / V. Trusilov, V. Sharov, V. Maidanik, M. Sedov // Modern automation technologies. - 1998. - No. 1. - p. 88-90.

2. Patent for utility model RU No. 33655, application 2003117183 dated June 11, 2003, IPC: 7 G01S 7/12, published on October 27, 2003 newsletter No. 30, part 3.

Claims (1)

A unit for combining video and graphic information containing a radar bus interface unit, a scaling unit, the group of outputs of which is connected to the coordinate system converter unit, a memory arbiter, a display memory unit, a digital radar control and reception command unit, the input group of which is connected to the computer system bus , a three-channel digital-to-analog video signal converter, an output unit of a monitor interface, the output of which forms an output bus of a monitor interface, characterized in that the interface unit is glad the location bus, the scaling unit, the coordinate system converter unit, the memory arbiter, the display memory block are allocated to a separate channel for preparing the radar data for display, duplicated by a second channel of the same composition and an additional radar selector block in azimuth and distance, an input group which is connected to the radar bus interface unit, the first group of outputs is connected to the scaling unit, the second group of outputs is connected to the coordinate system converter unit, the unit with a radar detector for a frame whose input group is connected to the coordinate system converter unit, the output group is connected to a memory arbiter, an afterglow control unit, whose first input-output group is connected to a memory arbiter, and the input-output group of each additional input unit is connected to the local bus control and data exchange, and then in two channels for preparing the radar data for display, a display control unit is introduced, the first and second group of inputs of which are connected to the afterglow control unit In the first and second channels, respectively, the group of inputs and outputs is connected to the local control and data exchange bus, and the output is connected to a three-channel digital-to-analog video signal converter, a background image forming unit, a coordinate system converter unit, a graphic primitives memory block, a monitor interface signal generating unit, the group of inputs of which is the input bus of the monitor interface, the group of inputs and outputs is connected to the local control and data exchange bus, the first group of outputs It is connected to the afterglow control units and the radar selector blocks for the frame of the first and second channels for preparing the radar data for display, and the second group of outputs is connected to the output unit of the monitor interface, the first and second group of inputs and outputs of the background image forming unit are connected to the coordinate system converter unit and with a memory unit of graphic primitives, respectively, the third group of inputs and outputs is connected to a local control and data exchange bus, the fourth group of inputs and outputs is connected to a block m generating signals of the monitor interface, the group of outputs is connected to the output unit of the monitor interface.