KR102009501B1 - Method and Apparatus for Converting Symbol Signal for Radar System - Google Patents

Abstract

Embodiments of the present invention convert analog symbol shape signals and position signals used in a PPI scope to digital, match symbol images generated from stored symbol images and digital symbol shape signals, and based on symbol positions calculated from digital symbol position signals. The present invention provides a symbol signal converting apparatus and method of a radar system capable of generating an image signal input to a digital display by converting the matched symbol image into an image signal.

Description

{Method and Apparatus for Converting Symbol Signal for Radar System}

TECHNICAL FIELD The present embodiment pertains to an apparatus and method for converting an analog symbol signal into a digital image signal in a radar system.

The contents described in this section merely provide background information on the present embodiment and do not constitute a prior art.

Radar system display methods include A scope, B scope, and PPI scope. Plane Position Indicator (PPI) scope method detects the material of object by scanning line rotating clockwise on circular indicator. The scan line indicates the direction in which the antenna emits a probe and receives reflected waves.

The input signal of the PPI scope is inputted with various signals separated from the general CRT input signal. The input signal of the PPI scope includes a video signal, a blank signal, a symbol shape signal, a symbol condition signal, and a symbol position signal. On the other hand, the general CRT method displays a signal input by an electron gun and a deflection coil on a glass panel. A typical CRT input signal has an RGB input value input to the electron gun and a positional pixel value input to the deflection coil.

As the PPI scope exhibitor or parts are discontinued, it is difficult to operate the existing radar system. There is a need for a converter that can convert an analog signal input to an existing PPI scope into a digital signal and display it in a digital display such as an LCD.

Embodiments of the present invention convert the analog symbol shape signals and position signals used in the PPI scope to digital, match symbol images generated from stored symbol images and digital symbol shape signals, and calculate symbol positions calculated from digital symbol position signals. The main purpose of the present invention is to generate an image signal input to a digital display by converting the matched symbol image into an image signal based on the.

Still other objects of the present invention may be further considered without departing from the following detailed description and effects thereof.

According to an aspect of the present embodiment, a symbol signal receiving unit for receiving an analog symbol shape signal, an analog symbol position signal, and an analog symbol condition signal used in a planar scope scope, the analog symbol shape signal, and the analog signal An analog symbol digital converter for converting a symbol position signal and the analog symbol condition signal into the digital symbol shape signal, the digital symbol position signal, and the digital symbol condition signal, and storing a plurality of preprocessed first symbol images A second symbol image is generated by using a first symbol image storage unit, the digital symbol shape signal, and the digital symbol condition signal, and the second symbol image is stored among the first symbol images stored in the first symbol image storage unit. A second symbol image matching unit configured to select a symbol image matching the at least one symbol image; A symbol position calculator for calculating a symbol position from a symbol position signal and the digital symbol condition signal, and an image signal converter for converting the matching symbol image into an image signal input to a digital display based on the symbol position; Provided is a symbol signal conversion apparatus of a radar system.

According to another aspect of the present embodiment, in a symbol signal conversion method by a symbol signal conversion apparatus of a radar system, an analog symbol shape signal, an analog symbol position signal, and an analog symbol condition used in a PLAN scope (Scope Position Scope) Receiving a signal, converting the analog symbol shape signal, the analog symbol position signal, and the analog symbol condition signal into the digital symbol shape signal, the digital symbol position signal, and the digital symbol condition signal, preprocessing Storing the plurality of first symbol images stored in a first symbol image storage unit of the symbol signal conversion apparatus, generating a second symbol image by using the digital symbol shape signal and the digital symbol condition signal, and generating the first symbol image. The second symbol among first symbol images stored in a symbol image storage unit; Selecting a symbol image matching the image, calculating a symbol position from the digital symbol position signal and the digital symbol condition signal, and an image signal capable of inputting the matching symbol image to a digital display based on the symbol position It provides a symbol signal conversion method comprising the step of converting and outputting.

According to another aspect of the present embodiment, an analog symbol shape signal, an analog position signal, and an analog symbol condition signal used in a PPI scope are converted into a digital symbol shape signal, a digital position signal, and a digital symbol condition signal, and stored in advance. Selecting a symbol image by matching and matching a symbol image and a second symbol image generated from the digital symbol shape signal, and converting the matched symbol image to an image signal based on a symbol position calculated from the digital symbol position signal. A symbol signal conversion device, a video signal conversion device for converting an analog video signal used in the PPI scope into a digital video signal, and adjusting the brightness of the digital video signal, and synthesizing the image signal and the adjusted digital video signal. Radar system signal including image synthesizer Provide a converter.

As described above, according to embodiments of the present invention, an analog symbol shape signal and a position signal used in a PPI scope are converted to digital, a symbol image generated from a stored symbol image and a digital symbol shape signal is matched, and digital By converting the matched symbol image into an image signal based on the symbol position calculated from the symbol position signal, there is an effect of generating an image signal input to the digital display.

Even if the effects are not explicitly mentioned herein, the effects described in the following specification and the tentative effects expected by the technical features of the present invention are treated as described in the specification of the present invention.

1 is a block diagram illustrating a signal conversion apparatus of a radar system according to an embodiment of the present invention.
2 is a diagram illustrating a signal used by the signal conversion apparatus of the radar system according to an embodiment of the present invention.
3 is a diagram illustrating a display form of a PPI scope.
4 is a diagram illustrating a symbol shape signal of a PPI scope.
5 is a diagram illustrating a symbol position signal of a PPI scope.
6 is a block diagram illustrating a symbol signal conversion apparatus of a radar system according to another embodiment of the present invention.
7 is a diagram illustrating an operation of matching a symbol shape by a symbol signal conversion apparatus of a radar system according to another exemplary embodiment of the present invention.
8 is a diagram illustrating an operation of calculating a symbol position by a symbol signal conversion apparatus of a radar system according to another exemplary embodiment of the present invention.
9 is a block diagram illustrating a video signal conversion apparatus of a radar system according to another embodiment of the present invention.
10 is a flowchart illustrating a symbol signal conversion method of a radar system according to another embodiment of the present invention.

Hereinafter, in the following description of the present invention, if it is determined that the subject matter of the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted and some embodiments of the present invention will be omitted. It will be described in detail with reference to the exemplary drawings.

1 is a block diagram illustrating a signal conversion apparatus of a radar system according to an embodiment of the present invention.

As shown in FIG. 1, the signal conversion apparatus 100 of the radar system includes a symbol signal conversion apparatus 200 of the radar system, a video signal conversion apparatus 300 of the radar system, and an image synthesizer 400. The signal conversion apparatus 100 of the radar system may omit some of the various components illustrated in FIG. 1 or further include other components.

The signal conversion apparatus 100 of the radar system converts an analog symbol shape signal and a position signal used in a PPI scope into digital, matches a symbol image generated from a stored symbol image and a digital symbol shape signal, and The device converts the matched symbol image into an image signal based on the calculated symbol position, synthesizes a digitally converted video signal, and outputs the synthesized video signal to the digital display device 400.

The symbol signal conversion apparatus 200 of the radar system converts analog symbol shape signals, analog position signals, and analog symbol condition signals used in the PPI scope into digital symbol shape signals, digital position signals, and digital symbol condition signals. Selecting and matching a symbol image by matching the second symbol image generated from the stored first symbol images with the digital symbol shape signal, and converting the matched symbol image into a symbol image signal based on a symbol position calculated from the digital symbol position signal. To convert.

The video signal converter 300 of the radar system converts an analog video signal used in a PPI scope into a digital video signal and adjusts the brightness of the digital video signal.

The image synthesizer 400 synthesizes the symbol image signal and the adjusted digital video signal. The image synthesizer 400 may synthesize the radar signal of the symbol image signal and the digital video signal. The image synthesizer 400 may overlay signals.

The digital display 500 is a device that receives a digital video signal and displays it on a panel. The digital display device 500 may be implemented as an LCD panel, but this is only an example and the present invention is not limited thereto. A suitable digital panel may be used according to a design to be implemented.

A signal input to the signal conversion apparatus of the radar system will be described with reference to FIGS. 2 to 5. 2 is a diagram illustrating a signal used by the signal conversion apparatus of the radar system according to an embodiment of the present invention.

The signal conversion device of the radar system replaces an existing PPI scope with a digital display, and thus processes the input signal of the PPI scope. The signal conversion apparatus of the radar system receives a video signal, a blank signal, a symbol shape signal, a symbol condition signal, and a symbol position signal. The signal input to the PPI scope is inputted separately from the symbol signal and the video signal.

2, the analog symbol shape signal includes a symbol deflection X voltage and a symbol deflection Y voltage, and the analog symbol position signal includes a main deflection X voltage and a main deflection Y voltage. The analog symbol valid signal is set high or low.

3 is a diagram illustrating a screen of a PPI scope. In FIG. 3, the symbol shape corresponding to the number 3 is displayed at the intersection of the bars. When the bar is rotated 360 degrees and intersects the line on the screen of the PPI scope, symbol and coordinate information is input. When crossed, the signal is input at the input frequency of the signal. If necessary, symbols and coordinate signals may be input regardless of the screen.

In FIG. 4, an input signal having a symbol shape corresponding to the number 3 is illustrated. During the time that the symbol valid signal is set to a logic low, the PPI scope combines the symbol deflection X voltage and the symbol deflection Y voltage to form a symbol.

In FIG. 5, the formed symbol is shown at a specific position on the screen. During the time that the symbol valid signal is set to a logic low, the PPI scope combines the main deflection X voltage and the main deflection Y voltage to set the position of the symbol.

Each symbol signal has a period of more than 1.8 Mhz and is continuously displayed until the symbol disappears from the position.

Hereinafter, a symbol signal conversion apparatus of a radar system will be described with reference to FIG. 6. 6 is a block diagram illustrating a symbol signal conversion apparatus of a radar system according to another embodiment of the present invention.

As shown in FIG. 6, the symbol signal conversion apparatus 200 of the radar system includes a symbol signal receiver 210, a symbol noise remover 220, an analog symbol digital converter 230, and a first symbol image storage unit ( 240, a second symbol image matching unit 250, a symbol position calculator 260, and a symbol image converter 270. Apparatus 100 includes and. The symbol signal conversion apparatus 200 of the radar system may omit some of the various components illustrated in FIG. 6 or further include other components. For example, the symbol noise remover 220 may be omitted.

The symbol signal receiving unit 210 receives an analog symbol shape signal, an analog symbol position signal, and an analog symbol condition signal used in a planar scope scope.

The symbol noise removing unit 220 removes noise of the analog symbol shape signal, the analog symbol position signal, and the analog symbol condition signal. The analog signal input to the PPI scope includes noise, and the symbol noise remover 220 performs filtering on the noise. The symbol noise remover 220 minimizes the flow of the protruding or recessed noise signal.

The analog symbol digital converter 230 converts an analog symbol shape signal, an analog symbol position signal, and an analog symbol condition signal into a digital symbol shape signal, a digital symbol position signal, and a digital symbol condition signal. The analog symbol digital converter 230 minimizes distortion generated during the conversion process.

The first symbol image storage unit 240 stores a plurality of preprocessed first symbol images. The first symbol image is a digital image signal input to a digital display, and has a shape defined for use on a radar system. The first symbol image storage unit 240 may store an image using dual ported RAM (DPRAM) capable of reading and writing at the same time.

The second symbol image matching unit 250 generates a second symbol image by using the digital symbol shape signal and the digital symbol condition signal, and matches the second symbol image among the first symbol images stored in the first symbol image storage unit. The symbol image to be selected is selected. The second symbol image matching unit 250 generates a symbol by combining the digital symbol deflection X voltage and the digital symbol deflection Y voltage for a time when the digital symbol condition signal is set to a valid value, and stores the generated symbol in the first symbol. The symbol is read by performing a comparison operation with the image symbol stored in the unit 240.

The second symbol image matching unit 250 may recognize a pattern by measuring similarity by performing template matching between the second symbol image and the stored first symbol images. The template matching moves a region having a specific size to the search region and calculates a difference in features. Template matching may be performed by comparing the brightness of relative images or converting them into feature spaces such as edges, corner points, and frequency conversion. The image can be normalized before matching. In FIG. 7, an operation of matching a symbol shape by a symbol signal conversion apparatus of a radar system is illustrated.

The symbol position calculator 260 calculates a symbol position from the digital symbol position signal and the digital symbol condition signal. The symbol position calculator 260 calculates a symbol position by combining the digital main deflection X voltage and the digital main deflection Y voltage for a time when the digital symbol condition signal is set to a valid value. The symbol position calculator 260 corrects the position signal. Since the input position signal is an analog signal, there is a possibility that the position value is changed every time the position value is input during the analysis process.

When the digital symbol shape signal and the digital symbol position signal are input at the same time, the symbol position calculator 260 samples the digital symbol position signal for a set position signal storage time shorter than a preset position signal input period based on the digital symbol condition signal. Save it. Sampling and storing location information by time. The symbol position calculator 260 calculates an average of the stored digital symbol position signals and determines the average of the calculated position signals as the positions of the matching symbol images.

In FIG. 8, an operation of calculating a symbol position by a symbol signal conversion apparatus of a radar system is illustrated. When the digital symbol shape signal and the digital symbol position signal are input at the same time, time-dependent signal processing is required. Since the location information is input at a period of 1.8 Mhz or more, it is 1/1800000 seconds (0.56 microseconds) when the symbol signal is input, so the location information (x, y) is stored for less time (t microseconds) than the corresponding period. do. Average the stored location information for a certain time (t microseconds). The average processed position information (x + a, y + b) is determined as the position of the signal processed symbol shape.

The symbol image converter 270 converts the matching symbol image into an image signal input to the digital display based on the symbol position and outputs the converted image. It processes the image so that it can be displayed on the digital display screen after receiving the matched symbol and location information. For example, the image may be improved, compressed, reconstructed, synthesized, etc. in accordance with the signal convention of the digital display.

9 is a block diagram illustrating a video signal conversion apparatus of a radar system according to another embodiment of the present invention.

As shown in FIG. 9, the video signal converter 300 of the radar system includes a video signal receiver 310, a video noise canceller 320, an analog video to digital converter 330, and a video signal controller 340. ). The video signal conversion apparatus 300 of the radar system may omit some of the various components illustrated in FIG. 9 or may further include other components.

The video signal receiver 310 receives an analog video signal and an analog blank signal used in a planar scope scope.

The video noise remover 320 removes noise of the analog video signal and the analog blank signal. The video noise remover 320 filters the noise to minimize the flow of the protruding or recessed noise signal.

The analog video digital converter 330 converts the analog video signal and the analog blank signal into a digital video signal and a digital blank signal. The analog video to digital converter 330 minimizes distortion generated during the conversion process.

The video signal controller 340 identifies the brightness of the digital video signal and filters the intensity of the digital video signal to adjust the signal intensity, interval, and the like. The video signal controller 340 identifies the radar ring signal included in the digital video signal and filters the radar ring signal to adjust the strength, interval, and the like of the signal.

Although components included in the signal conversion apparatus, the symbol signal conversion apparatus, and the video signal conversion apparatus of the radar system are illustrated separately in FIGS. 1, 6, and 9, the plurality of components may be combined with each other to form at least one It can be implemented as a module. The components are connected to the communication path connecting the software module or the hardware module inside the device and operate organically with each other. These components communicate using one or more communication buses or signal lines.

The signal conversion device, symbol signal conversion device, and video signal conversion device of the radar system may be implemented in a logic circuit by hardware, firmware, software, or a combination thereof, or may be implemented using a general purpose or special purpose computer. . The device may be implemented using a hardwired device, a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or the like. In addition, the device may be implemented as a System on Chip (SoC) including one or more processors and controllers.

The signal conversion device, the symbol signal conversion device, and the video signal conversion device of the radar system may be mounted in the form of software, hardware, or a combination thereof in a computing device provided with hardware elements. The computing device includes various or all communication devices such as a communication modem for performing communication with various devices or wired and wireless communication networks, a memory for storing data for executing a program, a microprocessor for executing and operating a program, and the like. It can mean a device.

10 is a flowchart illustrating a symbol signal conversion method of a radar system according to another embodiment of the present invention. The symbol signal conversion method of the radar system may be performed by a symbol signal conversion device.

In step S1010, the symbol signal conversion apparatus receives an analog symbol shape signal, an analog symbol position signal, and an analog symbol condition signal used in a PPI scope. The analog symbol shape signal includes a symbol deflection X voltage and a symbol deflection Y voltage, the analog symbol position signal includes a main deflection X voltage and a main deflection Y voltage, and the analog symbol valid signal is high ( It can be set to High or Low.

In step S1020, the symbol signal conversion apparatus converts the analog symbol shape signal, the analog symbol position signal, and the analog symbol condition signal into a digital symbol shape signal, a digital symbol position signal, and a digital symbol condition signal.

In operation S1030, the apparatus for converting symbol signals stores a plurality of preprocessed first symbol images in a first symbol image storage unit.

In operation S1040, the symbol signal conversion apparatus generates a second symbol image by using the digital symbol shape signal and the digital symbol condition signal, and matches the second symbol image among the first symbol images stored in the first symbol image storage unit. Select the symbol image. In the selecting of the symbol image (S1040), template matching is performed between the second symbol image and the stored first symbol images to recognize the image pattern based on the similarity.

In step S1050, the symbol signal conversion apparatus calculates a symbol position from the digital symbol position signal and the digital symbol condition signal. In operation S1050, when the digital symbol shape signal and the digital symbol position signal are input at the same time, the digital symbol position signal is generated for a position signal storage time set to be shorter than a preset position signal input period based on the digital symbol condition signal. Sample and save. In the calculating of the symbol position (S1050), the average of the stored digital symbol position signals is calculated, and the average of the calculated position signals is determined as the position of the matching symbol image.

In operation S1060, the apparatus for converting a symbol signal converts a matching symbol image based on a symbol position into an image signal input to a digital display and outputs the converted image.

The symbol signal conversion method of the radar system may further include removing noise of the analog symbol shape signal, the analog symbol position signal, and the analog symbol condition signal.

Although each process is described as being sequentially executed in FIG. 10, this is merely illustrative, and a person skilled in the art may change the order described in FIG. 10 without departing from the essential characteristics of the exemplary embodiment of the present invention. It may be possible to apply various modifications and variations, or to execute one or more processes in parallel or to add other processes.

The operations according to the embodiments may be implemented in the form of program instructions that may be executed by various computer means and may be recorded in a computer readable medium. Computer-readable media refers to any medium that participates in providing instructions to a processor for execution. Computer-readable media can include program instructions, data files, data structures, or a combination thereof. For example, there may be a magnetic medium, an optical recording medium, a memory, and the like. The computer program may be distributed over networked computer systems so that the computer readable code is stored and executed in a distributed fashion. Functional programs, codes, and code segments for implementing the present embodiment may be easily inferred by programmers in the art to which the present embodiment belongs.

The present embodiments are for describing the technical idea of the present embodiment, and the scope of the technical idea of the present embodiment is not limited by these embodiments. The scope of protection of the present embodiment should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present embodiment.

100: signal conversion device of the radar system
200: symbol signal conversion apparatus of the radar system
300: video signal conversion device of the radar system
400: video synthesizer 500: digital display
210: symbol signal receiving unit 220: symbol noise removing unit
230: analog symbol digital converter 240: first symbol image storage unit
250: second symbol image matching unit 260: symbol position calculating unit
270: symbol image conversion unit 310: video signal receiving unit
320: video noise canceller 330: analog video to digital converter
340: video signal controller

Claims (13)

A symbol signal receiver configured to receive an analog symbol shape signal, an analog symbol position signal, and an analog symbol condition signal used in a PPI scope;
An analog symbol digital converter for converting the analog symbol shape signal, the analog symbol position signal, and the analog symbol condition signal into a digital symbol shape signal, a digital symbol position signal, and a digital symbol condition signal;
A first symbol image storage unit configured to store a plurality of first processed symbol images;
A second symbol image is generated using the digital symbol shape signal and the digital symbol condition signal, and a symbol image matching the second symbol image is selected from among the first symbol images stored in the first symbol image storage unit. A second symbol image matching unit;
A symbol position calculator for calculating a symbol position from the digital symbol position signal and the digital symbol condition signal; And
An image signal converter for converting the matching symbol image into an image signal input to a digital display based on the symbol position and outputting the converted image signal
Symbol signal conversion apparatus of the radar system comprising a. The method of claim 1,
And a symbol noise removing unit which removes noise of the analog symbol shape signal, the analog symbol position signal, and the analog symbol condition signal. The method of claim 1,
The analog symbol shape signal includes a symbol deflection X voltage and a symbol deflection Y voltage, the analog symbol position signal includes a main deflection X voltage and a main deflection Y voltage, and the analog symbol valid signal. The symbol signal conversion apparatus of the radar system, characterized in that is set to High or Low. The method of claim 1,
The second symbol image matching unit,
And performing a template matching between the second symbol image and the stored first symbol images to recognize a pattern on a similarity scale. The method of claim 1,
The symbol position calculation unit,
When the digital symbol shape signal and the digital symbol position signal are simultaneously input, the digital symbol position signal is sampled and stored for a position signal storage time set to be shorter than a preset position signal input period based on the digital symbol condition signal. A symbol signal conversion device of a radar system. The method of claim 5,
The symbol position calculation unit,
And calculating the average of the stored digital symbol position signals and determining the average of the calculated position signals as the positions of the matching symbol images. In the symbol signal conversion method by the symbol signal conversion apparatus of the radar system,
Receiving an analog symbol shape signal, an analog symbol position signal, and an analog symbol condition signal for use in a Planar Indicator Scope;
Converting the analog symbol shape signal, the analog symbol position signal, and the analog symbol condition signal into a digital symbol shape signal, a digital symbol position signal, and a digital symbol condition signal;
Storing the plurality of processed first symbol images in a first symbol image storage unit of the symbol signal conversion apparatus;
Generating a second symbol image by using the digital symbol shape signal and the digital symbol condition signal, and selecting a symbol image matching the second symbol image from among first symbol images stored in the first symbol image storage; step;
Calculating a symbol position from the digital symbol position signal and the digital symbol condition signal; And
Converting the matching symbol image into an image signal input to a digital display based on the symbol position and outputting the converted image signal
Symbol signal conversion method comprising a. The method of claim 7, wherein
And removing noise of the analog symbol shape signal, the analog symbol position signal, and the analog symbol condition signal. The method of claim 7, wherein
The analog symbol shape signal includes a symbol deflection X voltage and a symbol deflection Y voltage, the analog symbol position signal includes a main deflection X voltage and a main deflection Y voltage, and the analog symbol valid signal. Is a high or low symbol signal conversion method characterized in that it is set. The method of claim 7, wherein
Selecting the symbol image,
And performing a template matching between the second symbol image and the stored first symbol images to recognize an image pattern based on similarity. The method of claim 7, wherein
Computing the symbol position,
When the digital symbol shape signal and the digital symbol position signal are simultaneously input, the digital symbol position signal is sampled and stored for a position signal storage time set to be shorter than a preset position signal input period based on the digital symbol condition signal. A symbol signal conversion method. The method of claim 11,
Computing the symbol position,
And calculating the average of the stored digital symbol position signals and determining the average of the calculated position signals as the positions of the matching symbol images. Converts analog symbol shape signals, analog position signals, and analog symbol condition signals used in the PPI scope into digital symbol shape signals, digital position signals, and digital symbol condition signals, and stores previously stored first symbol images and the digital symbol shapes. A symbol signal conversion device that selects a matching symbol image by matching a second symbol image generated from a signal, and converts the matched symbol image into an image signal based on a symbol position calculated from the digital symbol position signal;
A video signal conversion device for converting an analog video signal used in the PPI scope into a digital video signal and adjusting brightness of the digital video signal; And
An image synthesizer for synthesizing the image signal and the adjusted digital video signal
Signal conversion device of the radar system comprising a.

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